CN105781836B - The double electromagnetism hybrid fuel jet devices of the non pressurized combustion gas of combined type supercharging fuel - Google Patents

Abstract

It is an object of the invention to provide the double electromagnetism hybrid fuel jet devices of the non pressurized combustion gas of combined type supercharging fuel, including fuel pressurization part, dual-coil electromagnetic valve part, control section, crosspointer valve nozzle part and injection apparatus housing.The present invention controls the course of injection of combustion gas and fuel oil using two solenoid valves respectively, by varying two electromagnetic valve work states and job order, injection apparatus, which can be realized, only sprays fuel oil or the multiple-working modes such as combustion gas, two kinds of fuel are sprayed at the same time, two kinds of fuel sequencings spray, engine can work under pure fuel oil or oil pilot combustion gas pattern, and reliability is high.Fuel pressurization is realized using charged piston, and pressurization control and Injection Control separate, it is possible to achieve the flexible control of fuel injection characteristic, injection process any switching laws between supercharging and no charge mode, so as to obtain " boot-shaped ", " anxious after first delaying " fuel injection characteristic.

Description

Combined pressurized fuel-non-supercharged gas double electromagnetic mixed fuel injection device

technical field

The invention relates to a fuel injection device, in particular to a dual-fuel engine fuel injection device.

Background technique

With the continuous consumption of fossil fuels and the increasingly stringent emission regulations of internal combustion engines, the use of alternative fuels is an effective means to simultaneously solve the problems of energy shortage and environmental pollution faced by engine development. Natural gas and petroleum gas have become the main substitute fuels for internal combustion engines due to their abundant resources, low price, clean combustion, and high calorific value.

At present, there are two main fuel supply methods for dual-fuel engines: one is to mix the gaseous fuel with the inhaled air before it is introduced into the engine cylinder, and then directly inject a certain amount of liquid fuel near the top dead center of the combustion chamber, thereby causing Burning gas fuel, this method is likely to cause engine knocking, and in addition, when the engine is under low load, the pre-mixed gas is too thin to be conducive to combustion. Another method is to inject the gas directly into the combustion chamber, and also use the pilot amount of liquid fuel to trigger the combustion of the gas fuel. This method will not cause the engine to deflagrate prematurely, and the fuel burns in the diffusion combustion mode, and the combustion effect is good. , but it also has certain problems: First, the structure of the modern engine cylinder head is complex and there are many parts, so it is difficult to arrange two injectors. In addition, if two injectors are installed to inject dual fuel, the original The diesel engine has undergone major changes, increasing the complexity of device processing and assembly. Second, in order to improve the mixing degree of oil and gas, a high-pressure pump is often used to increase the fuel injection pressure. The structure of the high-pressure pump is complex, the transmission pipe from the pump end to the fuel nozzle is long, and the fuel pressure fluctuates greatly. Third, the injection device has high requirements for gas sealing. With the movement of the needle valve, the gas leaks upward along the gap between the needle valve coupler, and the leaked gas enters the control chamber, resulting in a decrease in the gas injection pressure and injection rate, which seriously affects the working stability of the device.

Contents of the invention

The purpose of the present invention is to provide a combined pressurized fuel-non-supercharged gas double electromagnetic mixed fuel injection device which can be switched between two modes during the fuel injection process.

The purpose of the present invention is achieved like this:

The combined pressurized fuel-non-pressurized gas dual electromagnetic mixed fuel injection device of the present invention is characterized in that it includes a fuel booster part, a gas injection part, a fuel injection part, an injection device body, a solenoid valve sleeve, an inner cylinder of the injection device, The base of the needle valve and the fuel booster part are installed above the injection device body. The solenoid valve sleeve and the inner cylinder of the injection device are installed in the injection device body from top to bottom. The base is installed under the injection device body through the nozzle cover, and the needle valve base includes a gas base and a fuel base;

The fuel booster part includes a booster solenoid valve, a booster piston, a booster piston sleeve, and an oil inlet valve, and the booster solenoid valve includes a booster solenoid valve seat, a booster electromagnet, a booster armature, and a booster solenoid valve stem. The booster solenoid valve seat is provided with a servo oil inlet port and a servo oil drain port. One end of the booster solenoid valve rod is fixed on the booster armature through a booster stop ring, and the other end passes through the booster solenoid valve seat and is in the sleeve. The pre-tightening force of the booster solenoid valve spring on it presses down on the baffle plate, the position of the booster armature forms a booster armature cavity, and the position of the booster solenoid valve spring forms a booster solenoid valve spring cavity, and the booster solenoid valve spring cavity is formed. The solenoid valve rod is provided with an annular oil belt, which realizes the connection or disconnection between the servo oil inlet port and the booster armature cavity and the connection between the servo oil drain port and the booster solenoid valve spring chamber through the movement of the booster solenoid valve rod. connected or disconnected; the booster piston is installed in the booster piston sleeve, and the booster piston sleeve is installed under the booster solenoid valve seat, and the servo oil is formed between the upper end of the booster piston, the booster piston sleeve and the booster solenoid valve seat. A booster chamber is formed between the lower end of the booster piston and the booster piston sleeve, and the booster piston spring is set on the booster piston; the oil inlet valve is a one-way valve installed in the booster piston sleeve, and the booster piston A fuel inlet is provided on the sleeve, the fuel inlet is connected to the fuel inlet valve, the outlet of the fuel inlet valve is connected to the booster chamber, and the booster chamber is connected to the central oil passage;

The gas injection part includes a control gas solenoid valve installed in the solenoid valve sleeve, a gas needle valve limit rod installed in the inner cylinder of the injection device, and a gas needle valve installed in the gas base. The control gas solenoid valve includes Gas solenoid valve body, gas solenoid, gas armature, gas valve stem upper sealing base, gas valve stem lower sealing base, gas solenoid valve spring, gas solenoid valve stem, gas solenoid valve body, gas valve stem upper sealing seat, gas The lower sealing seat of the valve stem and the limit rod of the gas needle valve are arranged from top to bottom, the gas solenoid valve cavity is formed between the gas solenoid valve body and the upper sealing base of the gas valve stem, the upper sealing base of the gas valve stem and the lower sealing base of the gas valve stem A gas groove cavity is formed between them, the gas solenoid is installed in the gas solenoid valve cavity, the gas armature is located under the gas solenoid, one end of the gas solenoid valve stem is stuck on the gas armature through the gas stop ring, and the other end runs through the gas armature The upper sealing base of the gas valve stem below is matched with the lower sealing base of the gas valve stem. The gas oil drain cavity is formed between the lower end of the gas solenoid valve stem and the lower sealing base of the gas valve stem. The gas upper sealing cone surface matched with the upper sealing base of the gas valve stem and the gas lower sealing cone surface matched with the lower sealing base of the gas valve stem are set, and the part of the valve stem of the gas solenoid valve matched with the upper sealing base of the gas valve stem forms a gas low pressure The oil ring belt, the part where the valve stem of the gas solenoid valve matches the lower sealing base of the gas valve stem forms a gas high pressure oil ring belt, the first gas oil channel and the fourth gas oil channel are set on the upper sealing base of the gas valve stem, The second gas oil channel and the third gas oil channel are arranged on the lower sealing base, the fifth oil channel is arranged in the injection device body, and the first low-pressure oil drain port, the second low-pressure oil drain port and the gas inlet are arranged on the injection device body. The first gas oil channel is connected to the gas solenoid valve cavity and the first low-pressure oil drain port, the gas center oil channel is set in the gas needle valve limit rod, the second gas oil channel is connected to the gas groove cavity and the gas center oil channel, and the third gas channel is The oil passage is connected to the gas high-pressure oil ring belt and the central oil passage, the fourth gas oil passage is connected to the gas low-pressure oil ring belt and the gas solenoid valve cavity, the gas oil drain chamber is connected to the second low-pressure oil drain port, and the gas needle valve is located at the gas needle valve limit. Below the position rod, a sealing ring and a gas chamber are respectively formed between the gas needle valve and the gas base, the sealing ring is connected to the central oil passage through the fifth gas oil passage, the gas chamber is connected to the gas inlet, and the end of the gas base is provided with a gas injection hole;

The fuel injection part includes a control fuel solenoid valve installed in the solenoid valve sleeve, a fuel piston installed in the inner cylinder of the injection device, and a fuel needle valve installed in the fuel seat. The control fuel solenoid valve includes a fuel solenoid valve body , fuel solenoid, fuel armature, fuel valve stem upper seal base, fuel valve stem lower seal base, fuel solenoid valve spring, fuel solenoid valve stem, fuel valve stem upper seal base, fuel valve stem lower seal base and fuel piston self- Arranged from top to bottom, a fuel solenoid valve cavity is formed between the fuel solenoid valve body and the upper sealing base of the fuel valve stem, and a fuel groove cavity is formed between the upper sealing base of the fuel valve stem and the lower sealing base of the fuel valve stem, and the fuel solenoid is installed on In the cavity of the fuel solenoid valve, the fuel armature is located under the fuel solenoid. One end of the fuel solenoid valve stem is stuck on the fuel armature through the fuel stop ring, and the other end runs through the sealing base of the fuel valve stem under the fuel armature. The fuel solenoid valve stem There is a lower fuel sealing tapered surface on the upper part that matches with the lower sealing base of the fuel valve stem. The fuel solenoid valve cavity and the fuel valve stem upper sealing base channel of the fuel groove cavity, the fuel solenoid valve cavity is connected to the first low-pressure oil drain port, and the fuel drain is formed between the lower end of the fuel solenoid valve stem and the lower sealing base of the fuel valve stem The fuel oil drain chamber is connected to the second low-pressure oil drain port. The upper end of the fuel piston is covered with a fuel piston sleeve. The fuel piston sleeve is located between the lower sealing base of the fuel valve stem and the fuel piston, and between the fuel piston and the fuel piston sleeve above The fuel piston control chamber is formed, the fuel piston control chamber communicates with the fuel high-pressure oil ring belt through the fuel oil passage, and the fuel piston control chamber communicates with the central oil passage, the fuel piston is covered with a fuel piston spring, and the fuel needle valve is located under the fuel piston , An oil tank is formed between the fuel needle valve and the fuel base, and the oil tank communicates with the central oil passage.

The present invention may also include:

1. The upper end of the gas needle valve is designed with a circular step. The gas needle valve control chamber is formed between the bottom of the circular step and the injection device body. The lower end of the gas needle valve limit rod is set inside the circular step of the gas needle valve. The gas needle valve control chamber communicates with the gas center oil passage.

2. When the control gas solenoid valve is not energized, the valve stem of the gas solenoid valve is pressed on the sealing base under the gas valve stem under the action of the gas solenoid valve spring, the gas high-pressure oil ring is closed, the gas low-pressure oil ring is opened, and the gas needle valve The control chamber is connected to the first low-pressure oil drain port; when the control gas solenoid valve is energized, the valve stem of the gas solenoid valve lifts up and presses on the sealing base of the gas valve stem, the gas low-pressure oil ring is closed, the gas high-pressure oil ring is opened, and the gas The needle valve control chamber communicates with the central oil passage.

3. When the control fuel solenoid valve is not energized, the fuel solenoid valve stem is pressed on the lower sealing base of the fuel valve stem under the action of the fuel solenoid valve spring, and the fuel oil channel is disconnected from the fuel groove cavity. When the control fuel solenoid valve is energized , the stem of the fuel solenoid valve lifts up, and the fuel oil channel communicates with the fuel groove cavity.

The advantage of the present invention is that: the combined pressurized fuel-non-supercharged gas dual electromagnetic hybrid fuel injection device of the present invention uses double needle valve nozzles to inject fuel and gas fuel, which saves space and simplifies the engine structure. The valves control the injection process of fuel and gas respectively. When one solenoid valve works alone, the injection device only injects one fuel; when two solenoid valves work at the same time, the two fuels are injected at the same time; , can realize sequential injection of two fuels, the injection device can work in pure diesel mode and fuel pilot gas mode, to meet the requirements of the engine for oil and gas mixing under different working conditions. In addition, the device uses a booster piston to achieve fuel boosting, and the booster control is separated from the fuel injection control, which can realize the flexible control of the fuel injection characteristics, not only can realize the arbitrary switching between booster and non-booster modes during the fuel injection process, but also It can realize the control of the start time of fuel boost regardless of the starting point of fuel injection, so as to obtain the "shoe-shaped" and "slow first and then fast" fuel injection rules.

At the same time, the device has the following beneficial effects: the device controls the oil drain circuit to flow through the upper part of the solenoid valve body, and the heat is taken away through the oil drain cycle to reduce the temperature of the solenoid valve part, ensuring the reliability and stability of the solenoid valve; A sealing ring is designed between the gas needle valve and the needle valve seat, and part of the control oil is introduced as the sealing oil to seal the gas, which can effectively prevent gas leakage. At the same time, the control oil in the control chamber and the sealing oil in the sealing ring are of the same type Oil and oil pressure are equal, which can effectively ensure that the control oil and sealing oil have no static leakage.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Figure 2a is a schematic diagram of fuel boosting, Figure 2b is a schematic diagram of a booster solenoid valve, Figure 2c is a schematic diagram of an oil inlet valve, Figure 2d is a schematic diagram of position 1 of the booster solenoid valve stem, and Figure 2e is a schematic diagram of position 2 of the booster solenoid valve stem;

Figure 3a is a schematic diagram of the double solenoid valve, Figure 3b is a schematic diagram of the gas solenoid valve control, Figure 3c is a schematic diagram of the fuel oil solenoid valve, Figure 3d is a schematic diagram of the valve stem position 1 of the gas solenoid valve, and Figure 3e is a schematic diagram of the valve stem position 2 of the gas solenoid valve ;

Fig. 4 is a schematic diagram of the control part;

Fig. 5a is a schematic diagram of a part of the nozzle, Fig. 5b is a schematic diagram of a part of a gas nozzle, and Fig. 5c is a schematic diagram of a part of a fuel nozzle.

Detailed ways

The present invention is described in more detail below in conjunction with accompanying drawing example:

1 to 5, the combined pressurized fuel-non-pressurized gas double electromagnetic mixed fuel injection device of the present invention is mainly composed of a fuel booster part 1, a double solenoid valve part 2, a control part 5, a double needle valve nozzle part 6 and The injection device body 7 is composed. The fuel booster part 1 mainly includes a booster solenoid valve 9, a booster piston 10, a booster piston spring 11, a booster piston sleeve 12, a fuel inlet valve 14, a booster chamber 15, a servo oil chamber 17, and the like. The double solenoid valve part 2 mainly includes a control gas solenoid valve 34, a control fuel solenoid valve 35, a solenoid valve sleeve 36, etc., and the control gas solenoid valve 34 and the control fuel solenoid valve 35 are all installed in the solenoid valve sleeve 36. The control part 5 mainly includes a gas needle valve limit rod 59, an injection device inner cylinder 62, a gas needle valve control chamber 63, a fuel piston spring seat 64, a fuel piston spring 65, a fuel piston 68, a fuel piston sleeve 69, and a fuel piston control chamber 70. The fuel oil passes through the solenoid valve sleeve 36 and the center oil passage on the inner tube 62 of the injection device in turn from the pressurization chamber 15 of the fuel booster part 1, and is divided into three paths at the center oil passage 67, and one path flows into the high-pressure oil that controls the gas solenoid valve 34. The ring belt 48 flows into the fuel piston control cavity 70 one way, and the other way flows into the oil groove 66 along the central oil passage 67 and continues to be divided into two branches, one flows into the oil storage groove 85 of the fuel nozzle 72, and the other flows into the sealing ring belt of the gas nozzle 81. The double needle valve nozzle part mainly includes a gas nozzle 71, a fuel nozzle 72, a needle valve base 73, a sealing ring 74, a nozzle cover 75, etc., and the gas nozzle 71 and the fuel nozzle 72 share a needle valve base 73. The gas nozzle 71 is made up of a gas needle valve spring 76, a gas needle valve 77, a gas chamber 79, a gas injection hole 80, and a sealing ring 81. An annular step is designed on the upper end of the gas needle valve 77, and a gas needle valve control chamber 63 is formed between the gas needle valve 77 and the injector body 7 under the annular step. The gas needle valve 77 and the gas needle valve limit rod 59 are installed coaxially, and the control oil enters the gas needle valve control cavity 63 through the central oil passage 60 on the gas needle valve limit rod 59 . A sealing ring 81 is designed between the gas needle valve 77 and the needle valve base 73 , and part of the control oil is introduced into the sealing ring 81 through the oil passage 82 on the needle valve base 73 .

The present invention may also include:

1. The booster solenoid valve 9 is composed of a solenoid valve seat 19, a solenoid valve spring 20, a solenoid valve rod 22, a spring washer 23, a baffle plate 24, an armature 25, a solenoid valve body 26, a stop ring 27, a coil 28, Electromagnet 29 etc. are formed. Wherein the solenoid valve rod 22 is designed with an annular oil belt 21 , the solenoid valve seat 19 is designed with a servo oil inlet 30 and a servo oil drain 18 , and the booster piston sleeve 12 is designed with a fuel inlet 13 . When the solenoid valve 9 is not energized, the annular oil belt 21 communicates with the oil drain port 18 and the servo oil chamber 17 through the oil passage; The oil inlet valve 14 is a one-way valve, installed on the booster piston sleeve 12, and mainly includes an oil inlet valve seat 31, an oil inlet valve spring 32, an oil inlet valve stem 33, and the like.

2. The control gas solenoid valve 34 mainly includes a solenoid valve body 37, an electromagnet 38, a coil 39, an armature 40, a valve stem upper sealing base 42, a solenoid valve spring 43, a solenoid valve stem 44, and a valve stem lower sealing base 46, stop ring 53 and so on. The solenoid valve stem 44 is designed with two sealing cones, and is designed with a high-pressure oil ring 48 and a low-pressure oil ring 50. When the gas solenoid valve 34 is not powered, the solenoid valve stem 44 acts on the solenoid valve spring 43. Press down on the lower sealing base 46 of the valve stem, the high-pressure oil ring 48 is closed, and the low-pressure oil ring 50 is opened; when the control gas solenoid valve 34 is energized, the solenoid valve stem 44 is lifted and pressed on the upper sealing base 42 of the valve stem, The low-pressure oil ring belt 50 is closed, and the high-pressure oil ring belt 48 is opened.

The combined pressurized fuel-non-pressurized gas dual electromagnetic mixed fuel injection device of the present invention is mainly composed of a fuel booster part 1, a double solenoid valve part 2, a control part 5, a double needle valve nozzle part 6 and an injection device body 7. The injection device body 7 has a first low-pressure oil drain port 3 , a gas inlet 4 and a second low-pressure oil drain port 8 , and a fuel oil inlet 13 is designed on the fuel booster part 1 .

The fuel booster part 1 is located above the injector body 7, and the two are connected by threads. The fuel booster part 1 mainly includes a booster solenoid valve 9, a booster piston 10, a booster piston spring 11, a booster piston sleeve 12, an oil inlet valve 14, a booster chamber 15, a servo oil chamber 17, and the like. Wherein, booster solenoid valve 9 is made of solenoid valve seat 19, solenoid valve spring 20, solenoid valve stem 22, spring washer 23, baffle plate 24, armature 25, solenoid valve body 26, stop ring 27, coil 28, electromagnet 29 and so on. The oil inlet valve 14 is a one-way valve, installed on the booster piston sleeve 12, and mainly includes an oil inlet valve seat 31, an oil inlet valve spring 32, an oil inlet valve stem 33, and the like. The solenoid valve stem 22 of the booster solenoid valve 9 is designed with an annular oil belt 21 , and the solenoid valve seat 19 is designed with a servo oil inlet 30 , a servo oil drain 18 and a fuel inlet 13 . One end of the solenoid valve stem 22 is fixed on the solenoid valve armature 25 through the stop ring 27, and can move left and right together with the armature 25. 24 on. The electromagnetic valve seat 19 can limit the lift of the electromagnetic valve rod 22, and an oil passage is designed on it, which can guide part of the servo oil to flow through the electromagnetic valve 9, cool the electromagnetic valve 9 and reduce the armature of the electromagnetic valve. 25 and the effect of the shock and vibration of valve rod 22 left and right motions. A servo oil cavity 17 is formed between the pressure surface above the large head of the booster piston 10 and the piston sleeve 12 and the solenoid valve seat 19, and a booster chamber 15 is formed between the pressure surface below the small head of the booster piston 10 and the piston sleeve 12. The return spring 32 of the oil inlet valve 14 has a small preload force and low opening pressure. When the fuel enters the oil inlet valve 14, the valve stem 33 opens under the action of the fuel, and the fuel enters the booster chamber 15; when the booster piston 10 goes down, the booster When the fuel pressure in the pressure chamber 15 rises, the fuel inlet valve 14 is closed.

The double solenoid valve part 2 is located in the injection device body 7 below the fuel booster part 1, mainly including the control gas solenoid valve 34, the control fuel solenoid valve 35, the solenoid valve sleeve 36, etc., the control gas solenoid valve 34 and the control fuel solenoid valve 35 They are all positioned and installed in the electromagnetic valve sleeve 36. Control gas solenoid valve 34 mainly includes solenoid valve body 37, electromagnet 38, coil 39, armature 40, valve stem upper sealing base 42, solenoid valve spring 43, solenoid valve stem 44, valve stem lower sealing base 46, stop ring 53 etc. A solenoid valve cavity 52 is formed between the solenoid valve body 37 and the upper sealing base 42 of the valve stem, and a groove cavity 49 is formed between the upper sealing base 42 of the valve stem and the lower sealing base 46 of the valve stem. The electromagnet 38 is installed in the solenoid valve cavity 52 of the solenoid valve body 37, the armature 40 is located below the electromagnet 38, one end of the solenoid valve stem 44 is stuck on the armature 40 through the stop ring 53, and the other end runs through the valve below the armature 40. The sealing base 42 on the stem is pressed on the sealing base 46 under the valve stem. The solenoid valve stem 44 is designed with two sealing cones, and is designed with a high-pressure oil ring 48 and a low-pressure oil ring 50. When the gas solenoid valve 34 is not powered, the solenoid valve stem 44 acts on the solenoid valve spring 43. Press down on the lower sealing base 46 of the valve stem, the high-pressure oil ring 48 is closed, and the low-pressure oil ring 50 is opened, as shown in Figure 3(d), at this time the gas needle valve control chamber 63 and the first low-pressure oil drain port 3 Connected; when the gas solenoid valve 34 is energized, the solenoid valve stem 44 lifts and presses on the sealing base 42 on the valve stem, the low-pressure oil ring belt 50 is closed, and the high-pressure oil ring belt 48 is opened, as shown in Figure 3(e), At this time, the gas needle valve control cavity 63 communicates with the central oil passage 67 . An oil passage 41 and an oil passage 51 are designed on the sealing base 42 on the valve stem. The oil passage 51 communicates with the low-pressure oil ring belt 50 and the solenoid valve chamber 52 . The oil passage 41 communicates with the solenoid valve chamber 52 and the first low-pressure oil drain port 3 . An oil passage 45 and an oil passage 47 are designed on the sealing base 46 under the valve stem. The oil passage 45 communicates with the groove cavity 49 and the central oil passage 60 of the gas needle valve limit rod 59. The oil passage 47 communicates with the high-pressure oil ring belt 48 and the injection device The central oil passage 67 on the inner barrel 62 . The drain oil circuit of the device flows through the solenoid valve, and the heat of the double solenoid valve is taken away by the fuel flow, which plays the role of cooling the solenoid valve, and reduces the impact and vibration of the armature of the solenoid valve moving up and down, thereby improving the work of the double solenoid valve. stability. The control valve stem of the control fuel solenoid valve 35 has only one sealing cone and a high-pressure oil ring belt 57. . The control part 5 is located in the injection device body 7 below the double solenoid valve part 2, and mainly includes the injection needle valve limit rod 59, the device inner cylinder 62, the gas needle valve control chamber 63, the fuel piston spring seat 64, the fuel piston spring 65, Fuel piston 68, fuel piston sleeve 69, fuel piston control chamber 70. The components of the control part 5 are installed in the inner cylinder 62 of the injection device. The inner cylinder 62 of the injection device is designed with a central oil passage 67 and an air passage 61 , and the gas needle valve limit rod 59 is designed with a central oil passage 60 . The fuel oil passes through the solenoid valve sleeve 36 and the center oil passage on the inner tube 62 of the injection device in turn from the pressurization chamber 15 of the fuel booster part 1, and is divided into three paths at the center oil passage 67, and one path flows into the high-pressure oil that controls the gas solenoid valve 34. The ring belt 48 flows into the fuel piston control cavity 70 one way, and the other way flows into the oil groove 66 along the central oil passage 67 and continues to be divided into two branches, one flows into the oil storage groove 85 of the fuel nozzle 72, and the other flows into the sealing ring belt of the gas nozzle 81. The double-needle valve nozzle part 6 is located below the injection device body 7 and mainly includes a gas nozzle 71, a fuel nozzle 72, a needle valve base 73, a sealing ring 74, a nozzle cover 75, etc., and the gas nozzle 71 and the fuel nozzle 72 share a needle valve base 73 . The gas nozzle 71 is made up of a gas needle valve spring 76, a gas needle valve 77, a gas chamber 79, a gas injection hole 80, and a sealing ring 81. An annular step is designed on the upper end of the gas needle valve 77, and a gas needle valve control chamber 63 is formed between the gas needle valve 77 and the injector body 7 under the annular step. The gas needle valve 77 and the gas needle valve limit rod 59 are installed coaxially, and the control oil enters the gas needle valve control cavity 63 through the central oil channel 60 on the gas needle valve limit rod 59 . The gas needle valve 77 is pressed on the needle valve base 73 to close the gas injection hole 80 under the pretightening force of the gas needle valve spring 76 . The gas enters the gas chamber 79 from the gas inlet 4 on the injector body 7 through the gas channel 61 and the gas channel 78 . The gas is above the gas chamber 79, and a sealing ring 81 is designed between the gas needle valve 77 and the needle valve base 73, and part of the control oil is introduced into the sealing ring 81 to seal the gas through the oil passage 82 on the needle valve base 73. The fuel nozzle 72 mainly includes a fuel needle valve 83, an oil tank 85, and a fuel injection hole 86. The fuel needle valve 83 is pressed by the fuel piston spring seat 64 on the needle valve base 73 to close the fuel injection hole 86. The fuel oil passes through the solenoid valve sleeve 36 and the center oil passage 67 on the inner cylinder 62 of the injection device in turn from the pressurization chamber 15 of the fuel pressurization part 1, and then enters the oil tank 85 through the oil passage 82 on the needle valve base 73. The nozzle cover 75 and the injection device body 7 are threadedly connected and a sealing ring 74 is designed to prevent high temperature and high pressure gas in the cylinder from entering the injection device double needle valve nozzle part.

The gas nozzle of the combined pressurized fuel-non-supercharged gas double electromagnetic hybrid fuel injection device of the present invention injects gas. When the gas needle valve is lifted and seated, the gas is easy to leak upwards with the movement of the valve stem, and the leaked gas When entering the gas needle valve control chamber 63, the gas injection characteristics will be seriously affected due to the compressibility of the gas. In order to solve this problem, the combined mixed fuel injection device of the present invention has a sealing ring 81 between the gas needle valve 77 and the needle valve base 73, and controls the oil to seal the gas through the introduction part of the oil passage, which can effectively prevent gas leakage. In addition, the control oil in the control chamber 63 of the gas needle valve and the sealing oil in the sealing ring 81 are the same oil, and the upper and lower oil pressures of the needle valve are equal, which can effectively ensure that there is no static leakage of the control oil and the sealing oil.

When the engine is working, the control unit collects the input signal of the sensor, drives the boost solenoid valve 9, controls the gas solenoid valve 34 and controls the fuel solenoid valve 35 to work, thereby respectively controlling the fuel boost, the gas injection of the gas nozzle 71 and the injection of the fuel nozzle 72. When the solenoid valve 9 is powered off, the solenoid valve stem 22 is pressed against the right side baffle plate 24 under the action of the solenoid valve spring 20. At this time, the annular oil belt 21 communicates with the oil drain port 19 and the servo oil chamber 17, as shown in the figure As shown in 2(d), the servo oil in the servo oil chamber 17 flows to the low-pressure oil drain port 19, the pressure in the servo oil chamber 17 decreases, the booster piston 10 moves upward under the action of the return spring 11, and the fuel pressure in the booster chamber 15 drops. The fuel that enters the fuel inlet valve 14 from the fuel inlet 13 pushes the valve stem 33 of the fuel inlet valve, and the booster device starts to feed oil; when the solenoid valve 9 is energized, the electromagnet 29 attracts the armature 25, and the armature 25 drives the solenoid valve stem 22 to the left At this time, the annular oil belt 21 communicates with the servo oil inlet 30 and the servo oil chamber 17, as shown in Figure 2(e), the servo oil enters the servo oil chamber 17, and the pressure in the servo oil chamber 17 gradually increases, pushing the pressurization Piston 10 descends, and the pressure in boost chamber 15 just begins to rise, and oil inlet valve 14 promptly closes, and boost piston 10 continues to descend to pressurize fuel in boost chamber 15. The fuel in the pressurization chamber 15 enters the fuel tank 79 of the fuel nozzle 72 through the air passage. When the control gas solenoid valve 34 is energized, the solenoid valve rod 44 is lifted, the high-pressure oil ring 48 is opened, the low-pressure oil ring 50 is closed, and the high-pressure oil flows through the high-pressure oil ring 48, the groove cavity 49, and the gas needle valve in sequence. The central oil channel 60 of the rod 59 flows into the gas needle valve control chamber 63, the gas needle valve 77 is lifted up rapidly under the action of the high-pressure oil in the gas needle valve control chamber 63, the gas injection hole 80 is opened, and the gas nozzle 71 starts to spray gas; When the solenoid valve 34 is powered off, the solenoid valve stem 44 is pressed against the sealing base 46 under the valve stem under the action of the solenoid valve spring 43, the high-pressure oil ring 48 is turned off, the low-pressure oil ring 50 is opened, and the gas needle valve control chamber 63 The high-pressure oil flows through the oil passage through the groove chamber 49 and the electromagnetic valve chamber 52 in sequence, and then flows from the oil passage 41 to the first low-pressure oil drain port 3, the oil pressure in the gas needle valve control chamber 63 decreases, and the gas needle valve 77 is in the position of the gas needle valve. The valve spring 76 is pressed down on the needle valve base 73 to close the gas injection hole 80, and the gas nozzle 71 stops spraying. When the control fuel solenoid valve 35 is powered off, the fuel control valve stem is pressed on the control valve seat under the action of the fuel control valve spring, and the high-pressure oil ring belt 57 is shut off. Under the action of the fuel piston spring 65, the fuel needle valve 83 is pressed by the fuel piston spring seat 64 on the needle valve base 73 to close the fuel injection hole 86, and the fuel nozzle 72 does not inject fuel; when the fuel solenoid valve 35 is energized, the fuel solenoid valve valve The lever is lifted, the high-pressure oil ring belt 34 is opened, and the high-pressure oil in the fuel piston control chamber 70 flows through the oil passage through the fuel groove chamber and the fuel solenoid valve chamber in sequence, and then flows from the oil passage 34 to the first low-pressure oil drain port 3, and the fuel oil The oil pressure in the piston control chamber 70 drops, the fuel needle valve 83 lifts up quickly to open the fuel injection hole 86, and the fuel nozzle 72 starts to inject fuel. According to the working conditions of the engine, the operating states and working sequences of the booster solenoid valve 9, the gas solenoid valve 34 and the fuel solenoid valve 35 can be selected to realize multiple oil and gas injection modes.

From the above working process, it can be seen that the combined supercharged fuel-non-supercharged gas double electromagnetic mixed fuel injection device uses double needle valve nozzles to inject fuel, which saves space and simplifies the engine structure. Two solenoid valves control the fuel of the two nozzles respectively. In the injection process, when only one solenoid valve is working, the injection device only injects fuel or gas; when two solenoid valves work at the same time, gas and fuel are injected at the same time; when two solenoid valves operate successively, the two fuels are injected sequentially. The gas injection process can be switched between supercharged and non-supercharged modes, the injection pressure is adjustable, and the fuel injection rule is flexible. Oil and gas mixing requirements under working conditions. The nozzle part of the device uses fuel oil to seal the gas, which can effectively prevent gas leakage, and the control oil and sealing oil use the same oil to effectively prevent the static leakage of fuel oil in the control chamber and the sealing ring. Therefore, the invention can make the engine meet the increasingly stringent emission regulations, and effectively improve its power, economy and reliability.

The combined pressurized fuel-non-pressurized gas dual electromagnetic mixed fuel injection device includes a fuel booster part, a double solenoid valve part, a control part, a double needle valve nozzle part and an injection device housing. There is a gas inlet and two low-pressure oil drain ports on the injection device housing, and the fuel oil inlet, servo oil inlet and servo oil drain port are provided on the pressurized part. The booster part mainly includes control booster solenoid valve, booster piston, booster piston sleeve, piston return spring, oil inlet valve, etc. The double solenoid valve part mainly includes a solenoid valve for controlling fuel oil and a solenoid valve for controlling gas. The two solenoid valves are installed in the same way, and they are both installed in the solenoid valve sleeve in the injection device body. The control part mainly includes the inner cylinder of the injection device, the gas needle valve limit rod, the gas needle valve spring, the gas needle valve control chamber, the fuel piston spring seat, the fuel piston spring, the fuel piston, the fuel piston sleeve, the fuel piston control chamber, etc. The components are all positioned and installed in the inner cylinder of the jetting device. The double needle valve nozzle part mainly includes gas nozzle, fuel nozzle, needle valve base, sealing ring, nozzle cover, etc., and the gas nozzle and fuel nozzle share a needle valve base.

The fuel booster solenoid valve includes solenoid valve body, solenoid, coil, solenoid valve stem, solenoid valve seat, armature, stop ring, solenoid valve spring, baffle, etc. The coil and the electromagnet are installed in the solenoid valve body, the armature is located on the right side of the electromagnet, one end of the valve stem of the solenoid valve is stuck on the armature through the stop ring, and the other end is pressed against the baffle under the action of the spring force. The solenoid valve seat is designed with a servo oil inlet and drain port, and the solenoid valve stem is designed with an annular oil belt. When the solenoid valve is energized, the valve stem moves to the left, and the annular oil belt connects the servo oil inlet and the servo oil chamber. Enter the servo oil chamber; when the solenoid valve is powered off, the solenoid valve stem is pushed against the right baffle, the annular oil belt is connected to the servo oil chamber and the oil drain port, and the servo oil flows to the low-pressure oil drain port.

Control gas solenoid valve mainly includes electromagnet, electromagnet, coil, armature, solenoid valve stem, valve stem upper sealing base, valve stem lower sealing base, solenoid valve spring, stop ring, etc. An electromagnetic valve cavity is formed between the electromagnetic valve body and the upper sealing base of the valve stem, and a groove cavity is formed between the upper sealing base of the valve stem and the lower sealing base of the valve stem. The electromagnet is installed in the electromagnetic valve cavity, the armature is located below the electromagnet, one end of which is stuck on the armature through the stop ring, and the other end passes through the upper sealing base of the valve stem below the armature, and is pressed on the lower sealing base of the valve stem. The sealing base on the valve stem is designed with two oil passages, one oil passage connects the groove chamber and the solenoid valve chamber, and the other oil passage connects the solenoid valve chamber and the first low-pressure oil drain port, and the drain oil passage flows through the solenoid valve body. The sealing base under the valve stem is designed with two oil passages, one oil passage connects the high-pressure oil ring belt and the gas needle valve control chamber, and the other oil passage connects the oil chamber under the valve stem of the solenoid valve and the second low-pressure oil drain port.

There are two annular oil bands designed on the valve stem of the control gas solenoid valve. The lower annular oil band is connected to the high-pressure oil inlet through the oil passage, and the upper annular oil band is connected to the low-pressure oil drain port through the oil passage.

The control gas solenoid valve stem is designed with two sealing cones, the upper sealing cone seals the low-pressure oil ring, and the lower sealing cone seals the high-pressure oil ring. The solenoid valve stem is seated, the high-pressure oil circuit is shut off, and the gas needle valve control chamber is connected to the low-pressure oil circuit; the solenoid valve stem is lifted, the low-pressure oil circuit is shut off, and the gas needle valve control chamber is connected to the high-pressure oil circuit.

The fuel control solenoid valve mainly includes electromagnet, electromagnet, coil, armature, solenoid valve stem, valve stem seal base, solenoid valve spring seat, solenoid valve spring, stop ring, etc. A solenoid valve cavity is formed between the solenoid valve body and the spring seat of the solenoid valve, and a groove cavity is formed between the spring seat of the solenoid valve and the sealing base of the valve stem. The electromagnet is installed in the solenoid valve cavity, and the armature is located under the electromagnet. The solenoid valve stem is designed with a high-pressure oil ring belt, one end of which is stuck on the armature through the stop ring, and the other end runs through the spring seat of the solenoid valve under the armature. On the stem seal seat, close the high pressure oil annulus. Two oil passages are designed on the spring seat of the electromagnetic valve, one oil passage communicates with the groove chamber and the solenoid valve chamber, and the other oil passage communicates with the solenoid valve chamber and the first low-pressure oil drain port, and the oil drain passage flows through the solenoid valve body. There are two oil passages designed on the valve stem sealing base, one oil passage connects the high-pressure oil ring belt and the fuel piston control chamber, and the other oil passage connects the oil chamber below the valve stem of the solenoid valve and the second low-pressure oil drain port.

The upper end of the gas needle valve in the control part is designed with a circular step, the gas needle valve control cavity is formed between the needle valve and the injection device body under the circular step, and the lower end of the gas needle valve limit rod is set on the circular step of the gas needle valve Inside, the gas needle valve limit rod and the gas needle valve are provided with a central oil passage along the axis, and the gas needle valve control cavity communicates with the electromagnetic valve groove cavity through the oil passage.

The gas and fuel nozzles share a single fuel inlet. Fuel enters the booster chamber from the fuel inlet valve on the booster piston bushing, passes through the solenoid valve bushing, and the central oil passage on the inner cylinder of the injection device in turn and is divided into four routes. The oil tank of the fuel nozzle flows into the high-pressure oil ring belt of the gas solenoid valve all the way, and flows into the sealing ring belt of the gas nozzle all the way.

Above the gas chamber of the gas nozzle, an annular sealing belt is designed between the gas needle valve and the needle valve base, and an annular oil groove and an oil passage are opened on the needle valve base to introduce part of the control oil into the annular sealing belt.

Claims (5)

1. the double electromagnetism hybrid fuel jet devices of combined type supercharging fuel-non pressurized combustion gas, it is characterized in that：Including fuel pressurization portion Point, fuel gas injection part, fuel oil spout part, injection apparatus body, electromagnetism valve pocket, injection apparatus inner cylinder, needle-valve base, fuel oil increase Laminate section is installed on above injection apparatus body, and electromagnetism valve pocket and injection apparatus inner cylinder are installed in injection apparatus body from top to bottom, Central oil passage is set in electromagnetism valve pocket and injection apparatus inner cylinder, needle-valve base is installed on below injection apparatus body by nozzle cage, The needle-valve base includes combustion gas base and fuel oil base；

The fuel pressurization part includes boost electromagnetic valve, charged piston, charged piston set, inlet valve, and boost electromagnetic valve includes Boost electromagnetic valve seat, supercharging electromagnet, be pressurized armature, boost electromagnetic valve bar, and servo oil oil inlet is set in boost electromagnetic valve seat With servo oil drain tap, boost electromagnetic valve bar one end is fixed on supercharging armature by being pressurized locating snap ring, and the other end is through supercharging Solenoid valve seat is simultaneously pressed on baffle under the action of the pretightning force for covering boost electromagnetic valve spring thereon, and supercharging armature institute is in place Put to form supercharging armature chamber, boost electromagnetic valve spring position forms boost electromagnetic valve spring cavity, sets on boost electromagnetic valve bar Put annular oily band, annular oil band by the movement of boost electromagnetic valve bar realize servo oil oil inlet be pressurized armature chamber connection or Disconnection and the connection or disconnection of servo oil drain tap and boost electromagnetic valve spring cavity；Charged piston is installed on charged piston set In, charged piston set is installed on below boost electromagnetic valve seat, and charged piston upper end is covered with charged piston and boost electromagnetic valve Servo oil pocket is formed between seat, pumping chamber is formed between charged piston bottom and charged piston set, is cased with increasing on charged piston Press piston spring；Inlet valve is check valve, and in charged piston set, charged piston puts on setting fuel filler, fuel oil Entrance connects inlet valve, the outlet pumping chamber of inlet valve, pumping chamber's connection central oil passage；

The fuel gas injection part include be installed on electromagnetism valve pocket in control gas electromagnetic valve, in injection apparatus inner cylinder Combustion gas needle-valve gag lever post and the combustion gas needle-valve in combustion gas base, it is described control gas electromagnetic valve include combustion gas electromagnetism Valve body, combustion gas electromagnet, combustion gas armature, sealed base, gas electromagnetic valve bullet under sealed base, combustion gas valve rod on combustion gas valve rod Spring, gas electromagnetic valve valve rod, gas electromagnetic valve body, combustion gas valve rod upper seal support, combustion gas valve rod bottom sealing socket and combustion gas needle-valve Gag lever post is arranged from top to bottom, forms gas electromagnetic valve chamber, combustion gas on gas electromagnetic valve body and combustion gas valve rod between sealed base Form combustion gas groove cavity on valve rod under sealed base and combustion gas valve rod between sealed base, combustion gas electromagnet is installed on combustion gas electromagnetism In valve chamber, combustion gas armature is located at below combustion gas electromagnet, and one end of gas electromagnetic valve valve rod is stuck in combustion gas by combustion gas locating snap ring On armature, other end sealed base on the combustion gas valve rod below combustion gas armature, and match with sealed base under combustion gas valve rod Close, form combustion gas draining chamber, gas electromagnetic valve valve under the bottom of gas electromagnetic valve valve rod and combustion gas valve rod between sealed base On bar respectively set with combustion gas valve rod on sealed base coordinate combustion gas on sealing cone and with sealed base under combustion gas valve rod Sealing cone under the combustion gas of cooperation, it is low that gas electromagnetic valve valve rod part matched with sealed base on combustion gas valve rod forms combustion gas Pressure oil annulus, gas electromagnetic valve valve rod form combustion gas high pressure oil annulus, combustion with the matched part of sealed base under combustion gas valve rod The 4th oil duct of the first oil duct of combustion gas and combustion gas is set on air valve stem on sealed base, combustion gas is set on sealed base under combustion gas valve rod The 3rd oil duct of second oil duct and combustion gas, the 5th oil duct of combustion gas is set in injection apparatus body, the first low pressure is set on injection apparatus body Drain tap, the second low pressure drain tap and fuel gas inlet, the first oil duct of combustion gas connection gas electromagnetic valve chamber and the first low pressure drain tap, Gas central oil duct, the second oil duct of combustion gas connection combustion gas groove cavity and gas central oil duct, combustion are set in combustion gas needle-valve gag lever post The 3rd oil duct of gas connects combustion gas high pressure oil annulus and central oil passage, the 4th oil duct of combustion gas connection Low Pressure Gas Network oil ring band and combustion gas electricity Magnet valve chamber, combustion gas draining chamber connect the second low pressure drain tap, and combustion gas needle-valve be located at below combustion gas needle-valve gag lever post, combustion gas needle-valve and Seal band and fuel chamber are formed between combustion gas base respectively, seal band connects central oil passage, combustion by the 5th oil duct of combustion gas Gas chamber connects fuel gas inlet, and combustion gas base end sets gas jet orifice；

The fuel oil spout part include be installed on electromagnetism valve pocket in control fuel solenoid valve, in injection apparatus inner cylinder Fuel piston and the fuel pin in fuel oil base, it is described control fuel solenoid valve include electromagnetic fuel valve body, Electromagnetic fuel iron, fuel oil armature, sealed base, electromagnetic fuel valve spring, fuel oil under sealed base, fuel oil valve rod on fuel oil valve rod Solenoid valve valve rod, sealed base and fuel piston are arranged from top to bottom under sealed base, fuel oil valve rod on fuel oil valve rod, fuel oil Electromagnetic fuel valve chamber is formed on electromagnetic valve body and fuel oil valve rod between sealed base, sealed base and fuel oil valve rod on fuel oil valve rod Fuel oil groove cavity is formed between lower sealed base, electromagnetic fuel iron is installed in electromagnetic fuel valve chamber, and fuel oil armature is located at fuel oil Below electromagnet, one end of fuel solenoid valve valve rod is stuck on fuel oil armature by fuel oil locating snap ring, and the other end is held in the mouth through fuel oil Sealed base on fuel oil valve rod below iron, is set on electromagnetic fuel valve rod and the matched fuel oil of sealed base under fuel oil valve rod Lower sealing cone, fuel solenoid valve valve rod form fuel oil high pressure oil annulus with the matched part of sealed base under fuel oil valve rod, Sealed base passage on the fuel oil valve rod of connection electromagnetic fuel valve chamber and fuel oil groove cavity is set on fuel oil valve rod in sealed base, Electromagnetic fuel valve chamber connects the first low pressure drain tap, shape between sealed base under fuel solenoid valve valve rod bottom and fuel oil valve rod Into fuel oil draining chamber, fuel oil draining chamber connects the second low pressure drain tap, and fuel piston upper end is cased with fuel piston set, and fuel oil is lived Plug sleeve is located under fuel oil valve rod between sealed base and fuel piston, fuel piston and above it fuel piston set between formed Fuel piston control chamber, fuel piston control chamber is communicated with fuel oil high pressure oil annulus by fuel oil oil duct, while fuel piston control Chamber processed is communicated with central oil passage, and fuel piston spring is cased with fuel piston, and fuel pin is located at the lower section of fuel piston, fuel oil Oil holding slot, oil holding slot connection central oil passage are formed between needle-valve and fuel oil base.

2. the double electromagnetism hybrid fuel jet devices of combined type supercharging fuel according to claim 1-non pressurized combustion gas, it is special Sign is：Combustion gas needle-valve upper end is designed with annular step, and combustion gas needle-valve is formed between injection apparatus body below annular step Control chamber, combustion gas needle-valve gag lever post lower end is sleeved on inside the annular step of combustion gas needle-valve, in combustion gas needle control chamber and combustion gas Heart oil duct communicates.

3. the double electromagnetism hybrid fuel jet devices of combined type supercharging fuel according to claim 1 or 2-non pressurized combustion gas, It is characterized in that：When control gas electromagnetic valve is not powered on, gas electromagnetic valve valve rod is pressed in combustion under the action of gas electromagnetic valve spring Under air valve stem on sealed base, combustion gas high pressure oil annulus is closed, Low Pressure Gas Network oil ring band is opened, combustion gas needle control chamber and first Low pressure drain tap connects；When controlling gas electromagnetic valve energization, gas electromagnetic valve valve rod, which lifts, is pressed in sealed base on combustion gas valve rod On, Low Pressure Gas Network oil ring band is closed, combustion gas high pressure oil annulus is opened, and combustion gas needle control chamber is connected with central oil passage.

4. the double electromagnetism hybrid fuel jet devices of combined type supercharging fuel according to claim 1 or 2-non pressurized combustion gas, It is characterized in that：When control fuel solenoid valve is not powered on, fuel solenoid valve valve rod is pressed in combustion under the action of electromagnetic fuel valve spring Under fuel tap bar on sealed base, fuel oil oil duct is disconnected with fuel oil groove cavity, when control fuel solenoid valve is powered, fuel solenoid valve valve Bar lifts, and fuel oil oil duct is connected with fuel oil groove cavity.

5. the double electromagnetism hybrid fuel jet devices of combined type supercharging fuel according to claim 3-non pressurized combustion gas, it is special Sign is：When control fuel solenoid valve is not powered on, fuel solenoid valve valve rod is pressed in fuel valve under the action of electromagnetic fuel valve spring Under bar on sealed base, fuel oil oil duct is disconnected with fuel oil groove cavity, when control fuel solenoid valve is powered, the lift of fuel solenoid valve valve rod Rise, fuel oil oil duct is connected with fuel oil groove cavity.