CN202417722U - Marine diesel oil/natural gas mixed combustion system - Google Patents
Marine diesel oil/natural gas mixed combustion system Download PDFInfo
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- CN202417722U CN202417722U CN2012200286325U CN201220028632U CN202417722U CN 202417722 U CN202417722 U CN 202417722U CN 2012200286325 U CN2012200286325 U CN 2012200286325U CN 201220028632 U CN201220028632 U CN 201220028632U CN 202417722 U CN202417722 U CN 202417722U
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Abstract
The utility model discloses a marine diesel oil/natural gas mixed combustion system which comprises a gas inlet system, a gas supply system, an oil supply system and an electric control system, wherein an engine body is provided with a revolution speed transducer; the gas inlet system comprises an air filter, a turbosupercharger, and a mixer; the mixer is communicated with the engine body; a pressure sensor is arranged between the turbosupercharger and the mixer; the air supply system comprises a gas storage bottle, a pressure reduction valve and a natural gas injection valve; the natural gas injection valve is communicated with the engine body through the mixer; the oil supply system comprises an oil injection pump; an accelerator actuator is installed on the oil injection pump; and the electric control system is an electric control unit which is respectively connected with an electromagnetic valve, a natural gas injection valve, a control valve, the revolution speed transducer, the pressure sensor, the accelerator actuator and an oil gas conversion switch electrically. According to the utility model, a power system can be optimized, the influences on the environment and ecology can be lowered, and the proportion between diesel oil and natural gas can be controlled accurately.
Description
Technical field
The utility model relates to a kind of diesel engine system, is that a kind of marine diesel oil/rock gas mixes the combustion system concretely.
Background technique
World today's petroleum resources plaque day by day are weary, and environmental pollution is severe day by day, and diesel engine is widely used as the power of various machineries owing to its good and economic and power character.But the soot of diesel engine and oxynitrides discharging are but relatively more serious, and very big to urban environment and human health risk, if do not adopt effective measures to solve, the application of diesel engine will receive the restriction of the Abgasgesetz of increasingly stringent.In recent years; Rock gas is paid close attention to international and domestic all receiving widely as a kind of novel energy; Exploitation and internal-combustion engine technology development along with natural gas resource; The motor of natural gas fuel can have lower discharging than equal petrol engine and diesel engine through better controlling, helps solving serious day by day atmosphere polluting problem.When diesel engine is mixed when burning rock gas, because rock gas is all gaseous state during with air mixing in motor, mix more evenly, it is also more complete to burn.Therefore, mix and burn the rock gas rear engine and compare with DENG and can obviously reduce emission of harmful substances, particularly granular material discharged.In addition, it also can eliminate serious harm things such as lead, benzene and aromatic hydrocarbon fully.Rock gas is a kind of fuel of cheapness simultaneously; And distribution extensively has good resource distribution; To reduce the degree of dependence of country with rock gas as substitute fuel, so rock gas is the ideal substitute of traditional fuel as the engine power energy to Imported oil.Rock gas was used for for the 30's as the motor fuel beginning, but receiving the natural gas storage technology limitation fails to be used widely.At present, duel fuel engine mainly takes gasoline or diesel engine refitted to improve, and can be divided into two kinds by its ignition mode:
(l) adopt Spark ignition type: the diesel engine that installs spark plug after this mode is used for petrol engine more or is used to remove oil nozzle additional.Comparatively simple when this mode is used for petrol engine, and need when being used for diesel engine reequip it, general way is that oil nozzle is dismantled, and installs spark plug additional in position.This method repacking rear engine can only be burnt rock gas.Though directly do not install spark plug additional and can keep former machine performance and do not tear oil nozzle open, implement comparatively difficulty.
(2) take diesel oil ignited mode: spray into a certain amount of diesel oil rock gas that ignites on the basis of burning rock gas simultaneously mixing.This mode both can be moved under dual fuel mode, also can under pure diesel fuel mode, work, and former machine changed little.But existing duel fuel engine is under overload condition; Particularly motor uses a period of time and after producing mechanical wear; Setting value under parameters such as the actual speed of duel fuel engine, actual throttle position and the corresponding operating mode can produce deviation; Thereby cause fuel delivery that bigger variation takes place; Finally make supply proportioning, fuel between two kinds of fuel of diesel oil and rock gas always consume control accuracy decline, do not reach the purpose of stable engine power, raising fuel economy and reduction exhaust emissions, the working life of having reduced motor when serious.
The model utility content
The purpose of the utility model is exactly the defective that exists to existing technology; Provide a kind of simple in structure, can optimize power system, reduce fuel cost; Can reduce environment and ecological influence, and can accurately control the mixed combustion system of marine diesel oil/rock gas of proportioning between diesel oil and the rock gas.
Its technological scheme is: marine diesel oil/rock gas mixes the combustion system, comprises gas handling system, air supply system, oil supply system that is connected with engine body and the automatical control system that is used to control engine body, and said engine body is provided with speed probe; Said gas handling system comprises air-strainer, turbosupercharger and the mixer that order is communicated with, and said mixer is communicated with engine body, is provided with pressure transducer between said turbosupercharger and the mixer; Said air supply system comprises air cylinder, reduction valve and the natural gas injection valve that is linked in sequence through pipeline, and said natural gas injection valve is communicated with engine body through mixer; Said oil supply system comprises the Injection Pump that is communicated with engine body, on the said Injection Pump throttle actuator is installed; Said automatical control system is an electronic control unit, and said electronic control unit is electrically connected with solenoid valve, natural gas injection valve, control valve, speed probe, pressure transducer and throttle actuator respectively, and said electronic control unit is electrically connected with oil-gas change-over switch.
Said natural gas injection valve is communicated with each cylinder of engine body through mixer.
Said engine body is provided with the temperature transducer that is electrically connected with electronic control unit.
After having adopted technique scheme; The beneficial effect that the utility model is obtained is: the utility model is simple in structure, does not change the motor original structure, and it is two kinds of fuel of incendivity rock gas/diesel oil both; The also pure diesel oil of burning; When not having enough gaseous fuel sources, duel fuel engine is easy to extensive recovery machine working method, and repacking is simple, cost is low.
Description of drawings
Fig. 1 is the utility model embodiment's a working principle flow chart.
Embodiment
As shown in Figure 1, marine diesel oil/rock gas mixes the combustion system, comprises gas handling system, air supply system, oil supply system that is connected with engine body and the automatical control system that is used to control engine body, and said engine body is provided with speed probe; Said gas handling system comprises air-strainer, turbosupercharger and the mixer that order is communicated with, and said mixer is communicated with engine body, is provided with pressure transducer between said turbosupercharger and the mixer; Said air supply system comprises air cylinder, reduction valve and the natural gas injection valve that is linked in sequence through pipeline, and said natural gas injection valve is communicated with engine body through mixer; Said oil supply system comprises the Injection Pump that is communicated with engine body, on the said Injection Pump throttle actuator is installed; Said automatical control system is an electronic control unit, and said electronic control unit is electrically connected with solenoid valve, natural gas injection valve, control valve, speed probe, pressure transducer and throttle actuator respectively, and said electronic control unit is electrically connected with oil-gas change-over switch.
Said natural gas injection valve is communicated with each cylinder of engine body through mixer.
Said engine body is provided with the temperature transducer that is electrically connected with electronic control unit.Through temperature transducer can monitor engine working state, thereby avoid damage to motor.
The working principle of automatical control system: when ECU experienced the engine load varies signal, the emitted dose respective change of control diesel engine diesel oil was to adapt to the requirement of engine operating condition when changing the natural gas injection amount.Sensor is used for signals such as perception throttle, engine speed and delivery temperature.These signals are used for confirming the emitted dose of rock gas and the fuel limit of desired diesel oil.The control mechanism that is adopted is to pass through the control fuel cut-off handle by the throttle actuator that ECU controls; Or directly control the fuel delivery that oil pump is controlled in oil pump ratch position by ECU control throttle actuator, make the emitted dose of diesel oil change to some extent to satisfy system and must control oily requirement according to the difference of rotating speed.
Throttle position switch, engine rotation speed sensor send to automatical control system with signal, and automatical control system is confirmed diesel injection amount and natural gas injection amount according to the engine operating condition of sensor impression.The emitted dose of rock gas is to be determined by the delivery pressure of decompressor setting and the switch of natural gas injection valve.
Because rock gas is spray to get into rather than negative pressure is drawn in the intake duct, when getting into air stream, the rock gas disturbance air, make to have the good mixing effect each other.According to engine type, watt level and application mode, choose the injection valve of 3 or 3 above different models, to satisfy the maximum fuel consumption of different motors.
The working principle of the utility model:
The gas decompression back of LNG gasification gets into mixer, mixes with fresh air.Also need for supercharged engine the mixed gas charge inter cooling.Mixed gas after the supercharging gets in the engine cylinder through intake manifold again.When piston stroking upward during with the near top dead center of mixed pressure reducer coupling, the high temperature that compression produces makes the mixed gas in an amount of diesel oil ignited cylinder that sprays into, and mixes combustion with it, promotes piston motion work.Can also between full diesel oil working method and double fuel working method, change easily through oil-gas change-over switch.
This system is through the diesel oil output control to the original fuel pump of diesel engine, and the method that is adopted is motor is adjusted in employing by the throttle actuator closed loop control of the band Displacement Feedback of ECU control a oil pump.ECU relies on the variation of sensor senses engine speed and load, increases or reduce the emitted dose of fuel oil and rock gas.Rock gas is ejected in the engine inlets after through the accurate measurement of natural gas injection valve.When oil-gas change-over switch places double fuel work shelves; The control CPU of system confirms engine operating condition according to tach signal and throttle position signal; And show with gas control mapping (MAP) according to the oil control that former CPU demarcates; Send electrical signal respectively to throttle actuator and rock gas nozzle; The rock gas nozzle is controlled and controlled to pump rack open and close the time, with accurate control fuel oil and rock gas delivery volume, the rock gas that sprays into fully mixes the back through mixer and air and gets in the engine inlets.The natural gas injection amount is decided according to the electrical signal of CPU and through effective aperture of controlling injection valve by controller, to obtain required rotating speed and power.In order to improve the control accuracy of natural gas injection amount, system adopts a plurality of valves to participate in the mode of work successively, thereby improves the working resolution of injection valve and the control accuracy of combustion gas.
Because the control of the diesel oil amount of this system realizes that through throttle actuator control fuel pump this is a known technology, repeats no more at this; When turning back to full diesel fuel mode, natural air-air source cuts off, and throttle actuator returns to original state; So when pure diesel oil mode of operation; Engine working mode and former machine that this system is installed are identical, can not influence the fuel feeding of motor, and be in full accord before fuel delivery and the installation system not.
The double fuel state is just made pilot fuel with a small amount of diesel oil down, and mainly is to use gas fuel.The power character of motor and fuel always consume the level that has kept former diesel engine, and discharging is greatly improved.In case bifuel system breaks down or has not had rock gas, then can return to the work of diesel engine state, has reduced the user cost of safeguarding of motor, has prolonged the boats and ships continual mileage.
The conversion of the utility model system realizes diesel oil and oil/gas double fuel working mode change through oil-gas change-over switch flexibly, makes motor both can use pure diesel fuel mode work, can use diesel oil and the work of rock gas mixed combustion mode again.Realize accurate control through CPU control software, to reach the balance of power character and Economy to diesel oil oil mass and rock gas tolerance.
Claims (3)
1. marine diesel oil/rock gas mixes the combustion system, comprises gas handling system, air supply system, oil supply system that is connected with engine body and the automatical control system that is used to control engine body, and it is characterized in that: said engine body is provided with speed probe; Said gas handling system comprises air-strainer, turbosupercharger and the mixer that order is communicated with, and said mixer is communicated with engine body, is provided with pressure transducer between said turbosupercharger and the mixer; Said air supply system comprises air cylinder, reduction valve and the natural gas injection valve that is linked in sequence through pipeline, and said natural gas injection valve is communicated with engine body through mixer; Said oil supply system comprises the Injection Pump that is communicated with engine body, on the said Injection Pump throttle actuator is installed; Said automatical control system is an electronic control unit, and said electronic control unit is electrically connected with solenoid valve, natural gas injection valve, control valve, speed probe, pressure transducer and throttle actuator respectively, and said electronic control unit is electrically connected with oil-gas change-over switch.
2. marine diesel oil/rock gas according to claim 1 mixes the combustion system, it is characterized in that: said natural gas injection valve is communicated with each cylinder of engine body through mixer.
3. marine diesel oil/rock gas according to claim 1 mixes the combustion system, and it is characterized in that: said engine body is provided with the temperature transducer that is electrically connected with electronic control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200286325U CN202417722U (en) | 2012-01-29 | 2012-01-29 | Marine diesel oil/natural gas mixed combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200286325U CN202417722U (en) | 2012-01-29 | 2012-01-29 | Marine diesel oil/natural gas mixed combustion system |
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| Publication Number | Publication Date |
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| CN202417722U true CN202417722U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200286325U Expired - Fee Related CN202417722U (en) | 2012-01-29 | 2012-01-29 | Marine diesel oil/natural gas mixed combustion system |
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| CN (1) | CN202417722U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103057396A (en) * | 2012-09-28 | 2013-04-24 | 浙江省海洋开发研究院 | Modified type dual-fuel power system of diesel engine |
| CN103321782A (en) * | 2013-07-11 | 2013-09-25 | 烟台杰瑞石油服务集团股份有限公司 | Dual-fuel modified system |
| CN104500277A (en) * | 2014-12-01 | 2015-04-08 | 中海石油气电集团有限责任公司 | LNG/diesel dual-fuel mixer for marine engine |
| CN105370418A (en) * | 2014-08-25 | 2016-03-02 | 武汉维思艾克软件有限公司 | Control method for blending combustion of diesel and natural gas |
| CN107120185A (en) * | 2017-06-07 | 2017-09-01 | 广西九壹动力科技有限公司 | Gas engine peculiar to vessel |
| CN109057978A (en) * | 2018-06-25 | 2018-12-21 | 重庆科克发动机技术有限公司 | A kind of control system of dual fuel engine |
| CN110219733A (en) * | 2019-06-27 | 2019-09-10 | 西华大学 | A kind of natural gas/gasoline double fuel GDI engine and its control method |
-
2012
- 2012-01-29 CN CN2012200286325U patent/CN202417722U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103057396A (en) * | 2012-09-28 | 2013-04-24 | 浙江省海洋开发研究院 | Modified type dual-fuel power system of diesel engine |
| CN103321782A (en) * | 2013-07-11 | 2013-09-25 | 烟台杰瑞石油服务集团股份有限公司 | Dual-fuel modified system |
| CN103321782B (en) * | 2013-07-11 | 2016-03-23 | 烟台杰瑞石油服务集团股份有限公司 | A kind of dual-fuel conversion system |
| CN105370418A (en) * | 2014-08-25 | 2016-03-02 | 武汉维思艾克软件有限公司 | Control method for blending combustion of diesel and natural gas |
| CN105370418B (en) * | 2014-08-25 | 2018-07-13 | 武汉维思艾克软件有限公司 | A kind of diesel oil mixes the control method of burning natural gas |
| CN104500277A (en) * | 2014-12-01 | 2015-04-08 | 中海石油气电集团有限责任公司 | LNG/diesel dual-fuel mixer for marine engine |
| CN107120185A (en) * | 2017-06-07 | 2017-09-01 | 广西九壹动力科技有限公司 | Gas engine peculiar to vessel |
| CN109057978A (en) * | 2018-06-25 | 2018-12-21 | 重庆科克发动机技术有限公司 | A kind of control system of dual fuel engine |
| CN110219733A (en) * | 2019-06-27 | 2019-09-10 | 西华大学 | A kind of natural gas/gasoline double fuel GDI engine and its control method |
| CN110219733B (en) * | 2019-06-27 | 2024-01-23 | 西华大学 | Natural gas/gasoline dual-fuel GDI engine and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20150129 |
|
| EXPY | Termination of patent right or utility model |