CN103670560A - Diesel engine and valve mechanism with valve early closing function of diesel engine - Google Patents
Diesel engine and valve mechanism with valve early closing function of diesel engine Download PDFInfo
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- CN103670560A CN103670560A CN201310574228.7A CN201310574228A CN103670560A CN 103670560 A CN103670560 A CN 103670560A CN 201310574228 A CN201310574228 A CN 201310574228A CN 103670560 A CN103670560 A CN 103670560A
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Abstract
The invention discloses a diesel engine and a valve mechanism with the valve early closing function of the diesel engine. The valve mechanism comprises a valve push rod, a plunger, a control module and a switching valve. The valve push rod and the plunger are matched to form a plunger cylinder. By the utilization of the displacement characteristic of the valve push rod relative to a cylinder cover, the control module is fixedly connected to the cylinder cover, the valve push rod and the control module are matched to form a mechanical sliding valve structure to control an oil inlet and an oil return port of the plunger cylinder to be closed or opened, and then the sliding valve structure is matched with the switching valve located between a pressure oil path and an oil inlet oil path of the control module to control the oil inlet time and the oil return time of the plunger cylinder. When an oil return oil path of a control system of the switching valve and an oil inlet oil path of a mechanical sliding valve are disconnected, a valve of the engine is normally closed; when the oil return oil path of the control system is connected with the oil return oil path of the mechanical sliding valve, the valve of the engine is closed in advance. Compared with the prior art, the structure and the control process of the valve mechanism are simple.
Description
Technical field
The present invention relates to the distribution device technical field of motor, particularly a kind of diesel engine and possess the distribution device that valve early closes function.
Background technique
Conventional engines adopts the mechanical air-distribution mechanism of camshaft actuated inlet door and exhauxt valve opens more, valve move through bent axle and camshaft, the mechanical transmission between camshaft and each valve reaches to be controlled regularly.The cam timing of mechanical air-distribution mechanism is the test by various different port timings, therefrom chooses a certain fixedly port timing and takes into account various operating modes, is a kind of half-way house of engine performance, thereby can not all reaches in all cases optimum performance.
Along with becoming increasingly conspicuous of the energy and environmental problem, how effectively utilizing the efficiency that the energy that fuel oil produces improves motor is the problem of all the time studying.In order to improve engine performance, improve the thermal efficiency and reduce hazardous emission, make the adjustable inexorable trend that become of port timing of distribution device.
Compare with fixed port timing, under rotating speed and load that variable valve timing can be in the whole operating range of motor, suitable valve timing or valve lift is provided, thereby improve motor inlet and outlet performance, the requirement of power character, Economy and toxic emission while meeting preferably high rotating speed and the slow-speed of revolution or large load and little load.
Existing variable valve actuating mechanism is that a plunger is set on the valve actuating push rod of motor, and ram lift is superimposed upon in former valve lift, realizes valve timing or lift is variable.Pressure oil turnover in plunger cavity is controlled in real time by high speed, large flow solenoid valve, circulation of the every work of each cylinder of motor, and pressure oil turnover plunger cavity is once.
Because each cylinder of motor takes turns to operate, so need to solenoid electric valve be set respectively to each cylinder, cost is high.The rotating speed of motor is very high, requires the switching response of solenoid electric valve fast, and control valve must meet traffic requirement, and manufacture difficulty is large.Each cylinder arranges respectively solenoid electric valve and has strict sequential requirement, and control system has been proposed to requirements at the higher level.
In view of this, those skilled in the art urgently provide a kind of simple in structure, operating cost is low possesses the distribution device that valve early closes, and to realize motor, at valve, normally closes mode of operation and valve is closed the switching between mode of operation in advance.
Summary of the invention
For above-mentioned defect, core object of the present invention is, provide a kind of simple in structure, operating cost is low possesses the distribution device that valve early closes function, to realize motor, at valve, normally closes mode of operation and valve is closed the switching between mode of operation in advance.On this basis, the present invention also provides a kind of diesel engine that comprises above-mentioned distribution device.
A kind of distribution device that valve early closes function that possesses provided by the present invention, comprises valve actuating push rod, and described valve actuating push rod has cylinder hole, oil inlet passage and drainback passage, also comprises:
Plunger, is positioned at described cylinder hole to form plunger case, and described valve actuating push rod is by the valve event of distribution device described in described plunger actuation, and described oil inlet passage and described drainback passage are communicated with the plunger cavity of described plunger case;
Control module, for being fixedly connected with the cylinder cap of described motor, described valve actuating push rod coordinates through described control module slipper seal, described control module offer oil-feed connecting passage and with oil return connecting passage;
Switch valve, is arranged between system oil return oil circuit and oil return connecting passage;
Described system oil return oil circuit and described oil return connecting passage disconnect, and described motor is positioned at valve normal mode of operation; Described system oil return oil circuit and the conducting of described oil return connecting passage, described motor switches to valve and cuts out in advance mode of operation.
Preferably, described cylinder hole has two limited parts, to limit described plunger with respect to the distance of axial displacement of described valve actuating push rod.
Preferably, described cylinder hole comprises three sections of holes that are communicated with successively that are interconnected, the intermediate hole aperture in three sections of described holes is greater than aperture, hole described in two other, and the plug of described plunger coordinates with described intermediate hole, and two described limited parts are formed at the joint in three sections of described holes.
Preferably, the shape of described valve actuating push rod is " T " font, and described oil inlet passage and described drainback passage are positioned at vertical portion, and described intermediate hole is positioned at horizontal part, and the aperture of described intermediate hole is greater than the external diameter of described vertical portion.
Preferably, in described oil inlet passage and described oil-feed connecting passage, at least one comprises oilhole and the oil groove being interconnected, and in described drainback passage and described oil return connecting passage, at least one comprises described in the oilhole and oil groove being interconnected;
The described oil groove of described oil inlet passage and/or described drainback passage is the circumferential hoop connected in star being opened on described valve actuating push rod outer wall, and described oil groove is communicated with described plunger cavity by described oilhole;
And/or the described oil groove of described oil-feed connecting passage and/or described oil return connecting passage is the circumferential hoop connected in star being opened on described control module and described gas push rod matching hole hole wall, described oil groove is communicated with described system pressure oil circuit by described oilhole.
Preferably, the oil sources of described system pressure fluid is provided by the oil pump being fixedly connected on described motor, and the oil inlet end of described oil pump is communicated with the sump of described motor, and its oil outlet end is communicated with described switch valve.
Preferably, described oil pump is specially the oil pump of described motor.
Engine valve actuating mechanism provided by the present invention, comprises valve actuating push rod, plunger, control module and switch valve.Wherein, valve actuating push rod has cylinder hole, oil inlet passage and drainback passage, and plunger is positioned at cylinder hole to form plunger case, and valve actuating push rod is by the valve event of plunger actuation distribution device, and oil inlet passage and drainback passage are communicated with the plunger cavity of plunger case; Control module is for being fixedly connected with the cylinder cap of motor, and valve actuating push rod coordinates through control module slipper seal, and control module offers oil-feed connecting passage and oil return connecting passage; Switch valve is arranged between system oil return oil circuit and oil return connecting passage;
System oil return oil circuit and oil return connecting passage disconnect, and motor is positioned at valve normal mode of operation; System oil return oil circuit and the conducting of described oil return connecting passage, described motor switches to valve and cuts out in advance mode of operation.
The present invention is by the improvement to existing machinery formula distribution device valve actuating push rod, be equipped with plunger and form plunger case structure, recycling gas push rod is with respect to the placement property with cylinder cap, make valve actuating push rod coordinate the mechanical type sliding valve structure forming with control module, then coordinate the oil circuit of controlling in real time plunger cavity with switch valve, realized distribution device and normally closed and close in advance the switching between mode of operation at valve.
Control plunger cavity oil circuit with available technology adopting solenoid electric valve and compare, the air distribution structure of this programme and control procedure are comparatively simple, and therefore, it is manufactured and operating cost has obtained significant reduction.In addition, the present invention only improves valve actuating push rod, can the timing of inlet and outlet door and lift independently be adjusted according to motor actual conditions needs, is particularly useful for inlet and outlet by the motor of same camshaft actuated.
The present invention also provides a kind of diesel engine, comprises engine main body and distribution device, and described distribution device is for the opening and closing of control engine valve, and described distribution device is specially distribution device as above.
Because above-mentioned distribution device has as above technique effect, therefore, comprise that the motor of this distribution device also should have identical technique effect, do not repeat them here.
Accompanying drawing explanation
Fig. 1 shows the structural representation of distribution device provided by the present invention;
Fig. 2 shows the local enlarged diagram in A place in Fig. 1;
Fig. 3 shows valve molded line schematic diagram under two all mode of operations of distribution device shown in Fig. 1.
Corresponding relation in Fig. 1 to Fig. 3 between reference character and all parts title:
1 valve actuating push rod, 11 cylinder holes, 12 oil inlet passages, 13 drainback passages, 2 plungers, 3 control modules, 31 oil-feed connecting passages, 32 oil return connecting passages, 4 switch valves, 5 oil pumps, 6 sumps.
Embodiment
Core object of the present invention is, provide a kind of simple in structure, operating cost is low possesses the distribution device that valve early closes function, to realize motor, at valve, normally closes mode of operation and valve is closed the switching between mode of operation in advance.On this basis, the present invention also provides a kind of diesel engine that comprises above-mentioned distribution device.
Without loss of generality, now with engine intake valve, close in advance as example by reference to the accompanying drawings, structure and the working principle thereof of distribution device provided by the present invention is described.
Refer to Fig. 1 and Fig. 3, wherein, Fig. 1 shows the structural representation of distribution device provided by the present invention, and Fig. 3 shows valve molded line schematic diagram under three kinds of mode of operations of distribution device shown in Fig. 1.
As shown in Figure 1, in this programme, distribution device comprises valve actuating push rod 1, plunger 22 and control module 3 and switch valve 4.Wherein, valve actuating push rod offers cylinder hole 11, oil inlet passage 12 and drainback passage 13, plunger 2 coordinates formation plunger case with this cylinder hole 11, oil inlet passage 12 and drainback passage 13 are all communicated with the plunger cavity of plunger case, and valve actuating push rod 1 drives the IO Intake Valve Opens of motors by plunger 2; Control module 3 is for being fixedly connected with the cylinder cap of motor, and valve actuating push rod 1 runs through control module 3 slipper seal cooperation with it, offers oil-feed connecting passage 31 and two oil return connecting passages 32 in control module 3; Switch valve 4 is arranged between system oil return oil circuit and oil return connecting passage 31.
Next, two kinds of mode of operations and the corresponding valve molded line of above-mentioned variable valve actuating mechanism are described in conjunction with Fig. 1 and Fig. 3:
1, intake valve is normally closed mode of operation, by switch valve 4 control oil return connecting passages 31 and system oil return oil circuit, disconnects; In the rise process of distribution device, oil inlet passage 12 is communicated with system pressure oil circuit by oil-feed connecting passage 31, plunger 2 slides into predeterminated position with respect to valve actuating push rod by initial position under pressure oil liquid effect, in backhaul process, due to oil return connecting passage 32 and the disconnection of system oil return oil circuit, distribution device cannot oil return, so plunger 2 is static with respect to valve actuating push rod 1, and IC Intake Valve Closes regularly remains unchanged.The corresponding valve molded line of this mode of operation is curve A in Fig. 2;
2, intake valve is closed mode of operation in advance, by switch valve 4, control oil return connecting passage and the conducting of system oil return oil circuit: in the rise process of distribution device, oil inlet passage 12 is communicated with system pressure oil circuit by oil-feed connecting passage 31, plunger 2 slides into predeterminated position with respect to valve actuating push rod by initial position under pressure oil liquid effect, in backhaul process, drainback passage 13 is by oil return connecting passage 32 and the conducting of system oil return oil circuit, plunger cavity inner fluid refluxes, plunger 2 is fallen after rise to initial position by precalculated position with respect to valve actuating push rod 1, and intake valve is closed in advance.The corresponding valve molded line of this mode of operation is curve B in Fig. 2.
The present invention is by the improvement to existing machinery formula distribution device valve actuating push rod, be equipped with plunger 2 and form plunger 2 cylinder structures, recycling valve 1 push rod is with respect to the placement property with cylinder cap, make valve actuating push rod 1 coordinate the mechanical type sliding valve structure forming with control module 3, then coordinate the oil circuit of plunger case is controlled in real time with switch valve 4, realized distribution device and normally closed and close in advance the switching between mode of operation at valve.
Control plunger case oil circuit with available technology adopting solenoid electric valve and compare, the air distribution structure in this programme and control procedure are comparatively simple, and therefore, manufacture and operating cost have obtained significant reduction.In addition, the present invention only improves valve actuating push rod, can inlet and outlet door independently be adjusted according to motor actual conditions needs in actual applications, is particularly useful for inlet and outlet by the motor of same camshaft actuated.
Further, this programme arranges two limited parts by interior in cylinder hole 11, to limit plunger 2 with respect to the distance of axial displacement of valve actuating push rod 1, realize distribution device and at valve, normally close valve lift under mode of operation and remain unchanged, to guarantee motor working stability under specific operation.Particularly, as shown in Figure 1, cylinder hole 11 comprises three sections of holes that are communicated with successively that are interconnected, and the intermediate hole aperture of three sector holes is greater than two other aperture, hole, and the plug of plunger 2 coordinates with intermediate hole, and two limited parts are formed at the joint of three sector holes.
Certainly, meeting on the basis of limit function, processing technology and assembly technology requirement, cylinder hole also can adopt other structural types.Be appreciated that distribution device also can flow into the fluid amount of plunger cavity by control, limit plunger 2 with respect to the distance of axial displacement of valve actuating push rod 1.
In addition, please continue referring to Fig. 1, in this programme, the shape of valve actuating push rod 1 is " T " font, and oil inlet passage 12 and drainback passage 13 are positioned at vertical portion, and intermediate hole is positioned at horizontal part, and the aperture of intermediate hole is greater than the external diameter of vertical portion.
In this programme, pass through the structure to valve actuating push rod 1, with and with the restriction of plunger 2 and control module 3 relative positions, on guaranteeing under engine work the basis of valve actuating push rod 1 rigidity requirement, guarantee as far as possible to improve rear distribution device overall volume variation less, thereby reduce, to installing, control requirement.
Certainly, meeting on the basis of adjusting valve-closing timing function, processing technology and assembly technology requirement, in this programme, valve actuating push rod 1 also can adopt other structures.
In addition, this programme also limits the concrete structure of drainback passage 13 and oil-feed connecting passage 31.Particularly, as shown in Figure 1, drainback passage 13 and oil-feed connecting passage 31 include oilhole and the oil groove being interconnected.Wherein, the oil groove of drainback passage 13 is the circumferential hoop connected in star being opened on valve actuating push rod 1 vertical portion outer wall, and this oil groove is communicated with plunger cavity by oilhole; The oil groove of oil-feed connecting passage 31 is the circumferential hoop connected in star being formed on control module 3 and valve actuating push rod 1 matching hole hole wall, and this oil groove is communicated with system pressure oil circuit by oilhole.
Obviously, this programme adopts drainback passage 13 and the oil-feed connecting passage 31 of said structure, after can avoiding valve actuating push rod 1 and control module 3 to relatively rotate on the one hand, oil inlet passage 12 and oil-feed connecting passage 31, drainback passage 13 and oil return connecting passage 32 cannot be communicated with, and cause distribution device cannot start the problem that intake valve postpones mode of operation, thereby can improve distribution device functional reliability and Security; On the other hand, in assurance, realize on the basis of intake valve normal off mode, can in oil groove, retain part fluid, when oil inlet passage 12 is communicated with the initial stage by oil-feed connecting passage 31 with system pressure oil circuit, oil groove inner fluid oil-feed oilhole flows in plunger cavity, thereby can accelerate the speed of response of distribution device.
Be appreciated that and meeting on the basis of above-mentioned functions, processing technology and assembly technology requirement, oil inlet passage 12 and oil return connecting passage 32 also can adopt said structure.
In addition, it should be noted that, in the system pressure oil circuit in this programme, pressure oil liquid is provided by the oil pump 5 being fixedly connected on motor, and the oil inlet end of this oil pump 5 is communicated with the sump of motor 6, oil outlet end is communicated with switch valve 4, and oil pump 5 is specially the oil pump of motor.
Obviously, this programme, by utilizing the self-contained oil pump of motor as the oil pump of system pressure oil circuit, is compared with independent oil pump is set, and the holistic cost of motor has obtained also corresponding reducing of reduction, volume.Certainly, satisfied, provide on the basis of the required oil sources of system pressure oil circuit, this programme is also used independently oil pump and/or oil sources.
Except above-mentioned distribution device, the present invention also provides a kind of motor, and this motor comprises cylinder body and the cylinder cap being fixedly connected with, and for opening the distribution device of valve on cylinder cap, this distribution device is specially structure as above.Be appreciated that the fundamental function parts of this motor and working principle and prior art are basic identical, those skilled in the art can realize completely based on prior art, therefore repeat no more herein.
The foregoing is only the preferred embodiment of the present invention, do not form limiting the scope of the present invention.Any any modification of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in claim protection domain of the present invention.
Claims (8)
1. possess a distribution device that early closes function, comprise valve actuating push rod (1), it is characterized in that, described valve actuating push rod (1) has cylinder hole (11), oil inlet passage (12) and drainback passage (13), and described distribution device also comprises:
Plunger (2), be positioned at described cylinder hole (11) to form plunger case, described valve actuating push rod (1) drives the valve event of described distribution device by described plunger (2), described oil inlet passage (12) and described drainback passage (13) are communicated with the plunger cavity of described plunger case;
Control module (3), for being fixedly connected with the cylinder cap of motor, described valve actuating push rod (1) coordinates through described control module (2) slipper seal, also offer oil-feed connecting passage (31) and with oil return connecting passage (32);
Switch valve (4), is arranged between system oil return oil circuit and oil return connecting passage (31);
Described system oil return oil circuit and described oil return connecting passage (32) disconnect, and motor is positioned at valve normal mode of operation; Described system oil return oil circuit and described oil return connecting passage (32) conducting, motor switches to valve and cuts out in advance mode of operation.
2. according to claim 1 possess the distribution device that valve early closes function, it is characterized in that, described cylinder hole (11) has two limited parts, to limit described plunger (2) with respect to the distance of axial displacement of described valve actuating push rod (1).
3. according to claim 2 possess the distribution device that valve early closes function, it is characterized in that, described cylinder hole (11) comprises three sections of holes that are communicated with successively that are interconnected, the intermediate hole aperture in three sections of described holes is greater than aperture, hole described in two other, the plug of described plunger (2) coordinates with described intermediate hole, and two described limited parts are formed at the joint in three sections of described holes.
4. according to claim 3 possess the distribution device that valve early closes function, it is characterized in that, the shape of described valve actuating push rod (1) is " T " font, described oil inlet passage (12) and described drainback passage (13) are positioned at vertical portion, described intermediate hole is positioned at horizontal part, and the aperture of described intermediate hole is greater than the external diameter of described vertical portion.
5. according to the distribution device that possesses valve described in claim 1 to 4 and early close function, it is characterized in that, in described oil inlet passage (12) and described oil-feed connecting passage (31), at least one comprises oilhole and the oil groove being interconnected, and in described drainback passage (13) and described oil return connecting passage (32), at least one comprises oilhole and the oil groove being interconnected;
The described oil groove of described oil inlet passage (12) and/or described drainback passage (13) is for to be opened in the circumferential hoop connected in star on described valve actuating push rod (1) outer wall, and described oil groove is communicated with described plunger cavity by described oilhole;
And/or the described oil groove of described oil-feed connecting passage (31) and/or described oil return connecting passage (32) is for being opened in the circumferential hoop connected in star on described control module (3) and described gas push rod (1) matching hole hole wall, described oil groove is communicated with described system pressure oil circuit by described oilhole.
6. possesses according to claim 5 the distribution device that valve early closes function, it is characterized in that, the oil sources of described system pressure fluid is provided by the oil pump (6) being fixedly connected on described motor, the oil inlet end of described oil pump (6) is communicated with the sump (7) of described motor, and its oil outlet end is communicated with described switch valve (4).
7. possess according to claim 6 the distribution device that valve early closes function, it is characterized in that, described oil pump (6) is specially the oil pump of motor.
8. a diesel engine, comprise engine main body and distribution device, described distribution device is used for the opening and closing of control engine valve, it is characterized in that, described distribution device is specially the distribution device that valve early closes function that possesses as described in any one in claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310574228.7A CN103670560B (en) | 2013-11-15 | 2013-11-15 | A kind of Diesel engine and possess valve and early close the valve actuating mechanism of function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310574228.7A CN103670560B (en) | 2013-11-15 | 2013-11-15 | A kind of Diesel engine and possess valve and early close the valve actuating mechanism of function |
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| Publication Number | Publication Date |
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| CN103670560A true CN103670560A (en) | 2014-03-26 |
| CN103670560B CN103670560B (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310574228.7A Active CN103670560B (en) | 2013-11-15 | 2013-11-15 | A kind of Diesel engine and possess valve and early close the valve actuating mechanism of function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167044A (en) * | 2017-12-28 | 2018-06-15 | 潍柴动力股份有限公司 | A kind of valve rocker arm assembly, variable valve actuating mechanism and engine |
| CN108240244A (en) * | 2017-12-29 | 2018-07-03 | 潍柴动力股份有限公司 | Diesel engine inlet valve variable system and diesel engine |
| CN114623008A (en) * | 2022-03-21 | 2022-06-14 | 潍柴动力股份有限公司 | Diesel engine control method, device and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108167044A (en) * | 2017-12-28 | 2018-06-15 | 潍柴动力股份有限公司 | A kind of valve rocker arm assembly, variable valve actuating mechanism and engine |
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| CN114623008A (en) * | 2022-03-21 | 2022-06-14 | 潍柴动力股份有限公司 | Diesel engine control method, device and system |
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| CN103670560B (en) | 2016-05-11 |
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