Control device for internal combustion engine
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0764720
(2010-04-21)
|
등록번호 |
US-8396644
(2013-03-12)
|
우선권정보 |
JP-2009-103251 (2009-04-21) |
발명자
/ 주소 |
- Kabashima, Hajime
- Urata, Yasuhiro
- Yamamoto, Kazushi
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
9 인용 특허 :
8 |
초록
▼
A control device for an internal combustion engine employing PCCI combustion, capable of realizing high-stability operation of the engine throughout a large operation area, is provided. The engine control device comprises a fuel supply system which supplies light oil or mixed fuel containing light o
A control device for an internal combustion engine employing PCCI combustion, capable of realizing high-stability operation of the engine throughout a large operation area, is provided. The engine control device comprises a fuel supply system which supplies light oil or mixed fuel containing light oil to the engine, a gas supply system which supplies hydrogen to the engine, and a required premixed gas calculating unit which previously stores and uses multiple combustion waveforms (changing depending on hydrogen addition concentration) as data. The required premixed gas calculating unit selects one of the combustion waveforms so as to achieve high thermal efficiency depending on the status of the engine and determines the hydrogen addition concentration (addition concentration of the hydrogen to be supplied to the engine) corresponding to the selected combustion waveform, by which the generation of PM and NOx can be reduced while also improving the thermal efficiency of the engine.
대표청구항
▼
1. A control device for an internal combustion engine operable with light oil or mixed fuel containing light oil, comprising: a fuel supply unit which supplies the light oil or the mixed fuel containing light oil to the internal combustion engine;a gas supply unit which supplies hydrogen to the inte
1. A control device for an internal combustion engine operable with light oil or mixed fuel containing light oil, comprising: a fuel supply unit which supplies the light oil or the mixed fuel containing light oil to the internal combustion engine;a gas supply unit which supplies hydrogen to the internal combustion engine;a combustion control unit which controls combustion in the internal combustion engine by use of combustion data related to hydrogen addition concentration previously obtained from multiple combustion waveforms changing depending on the hydrogen addition concentration; anda hydrogen addition quantity determining unit which determines the addition concentration of the hydrogen to be supplied to the internal combustion engine by selecting appropriate data from the combustion data related to the hydrogen addition concentration so as to achieve high thermal efficiency based on status of the internal combustion engine, wherein the determined addition concentration of the hydrogen is in a range of 4 to 16 volume percentage relative to intake air of the internal combustion engine. 2. The control device for an internal combustion engine according to claim 1, wherein the status of the internal combustion engine includes at least revolution speed of the internal combustion engine and required torque as torque that the internal combustion engine is required to output. 3. The control device for an internal combustion engine according to claim 1, further comprising an injection timing determining unit which determines injection timing of the light oil or the mixed fuel containing light oil based on the status of the internal combustion engine and the hydrogen addition concentration determined by the hydrogen addition quantity determining unit. 4. The control device for an internal combustion engine according to claim 3, wherein the status of the internal combustion engine includes at least revolution speed of the internal combustion engine and required torque as torque that the internal combustion engine is required to output. 5. A control device for an internal combustion engine operable with light oil or mixed fuel containing light oil, comprising: a fuel supply unit which supplies the light oil or the mixed fuel containing light oil to the internal combustion engine;a gas generating unit which generates reformed gas containing hydrogen from the light oil or the mixed fuel containing light oil;a gas supply unit which supplies the reformed gas containing hydrogen to the internal combustion engine;a combustion control unit which controls combustion in the internal combustion engine by use of combustion data related to hydrogen addition concentration previously obtained from multiple combustion waveforms changing depending on the hydrogen addition concentration; anda hydrogen addition quantity determining unit which determines the addition concentration of the hydrogen to be supplied to the internal combustion engine by selecting appropriate data from the combustion data related to the hydrogen addition concentration so as to achieve high thermal efficiency based on status of the internal combustion engine. 6. The control device for an internal combustion engine according to claim 5, wherein the status of the internal combustion engine includes at least revolution speed of the internal combustion engine and required torque as torque that the internal combustion engine is required to output. 7. The control device for an internal combustion engine according to claim 5, further comprising an injection timing determining unit which determines injection timing of the light oil or the mixed fuel containing light oil based on the status of the internal combustion engine and the hydrogen addition concentration determined by the hydrogen addition quantity determining unit. 8. The control device for an internal combustion engine according to claim 7, wherein the status of the internal combustion engine includes at least revolution speed of the internal combustion engine and required torque as torque that the internal combustion engine is required to output. 9. A control device for an internal combustion engine using light oil or mixed fuel containing light oil as fuel and igniting the fuel in each combustion chamber by compressing the fuel, comprising: a fuel supply unit which supplies the fuel to each cylinder of the internal combustion engine;a gas supply unit which supplies premixed gas containing hydrogen to each cylinder of the internal combustion engine;a required torque calculating unit which calculates required torque, as torque that should be outputted by the internal combustion engine, based on an accelerator angle and revolution speed of the internal combustion engine;a fuel injection quantity calculating unit which calculates fuel injection quantity, as quantity of the fuel to be injected into each cylinder, based on the revolution speed of the internal combustion engine and the required torque calculated by the required torque calculating unit;a fuel supply control unit which controls injection timing and injection time of the fuel injected by the fuel supply unit into each cylinder based on PCCI (Premixed Charge Compression Ignition) combustion conditions of the internal combustion engine and the fuel injection quantity calculated by the fuel injection quantity calculating unit;a hydrogen addition concentration-related combustion data storage unit which stores combustion data related to hydrogen addition concentration previously obtained from multiple combustion waveforms changing depending on the hydrogen addition concentration, while using operational status information on the internal combustion engine, including at least the revolution speed of the internal combustion engine and the required torque calculated by the required torque calculating unit, as parameters;a hydrogen addition quantity determining unit which determines the quantity of the hydrogen to be supplied to each cylinder of the internal combustion engine by calculating a target hydrogen addition concentration achieving optimum thermal efficiency of the internal combustion engine by referring to the operational status information on the internal combustion engine and using the combustion data related to the hydrogen addition concentration stored in the hydrogen addition concentration-related combustion data storage unit; anda gas supply control unit which controls injection timing and injection time of the premixed gas injected by the gas supply unit into each cylinder based on the PCCI combustion conditions of the internal combustion engine and the quantity of the hydrogen to be supplied to each cylinder determined by the hydrogen addition quantity determining unit. 10. The control device for an internal combustion engine according to claim 9, wherein the operational status information on the internal combustion engine includes at least the revolution speed of the internal combustion engine and the required torque. 11. The control device for an internal combustion engine according to claim 9, further comprising an exhaust NOX concentration storage unit which stores exhaust NOX concentration data previously estimated corresponding to at least the operational status information on the internal combustion engine and the injection timing of the fuel, wherein after the determination of the target hydrogen addition concentration achieving the optimum thermal efficiency of the internal combustion engine by the hydrogen addition quantity determining unit, the fuel supply control unit determines the injection timing of the fuel by referring to the operational status information on the internal combustion engine and using the exhaust NOX concentration data stored in the exhaust NOX concentration storage unit. 12. The control device for an internal combustion engine according to claim 11, wherein the operational status information on the internal combustion engine includes at least the revolution speed of the internal combustion engine and the required torque. 13. A control device for an internal combustion engine using light oil or mixed fuel containing light oil as fuel and igniting the fuel in each combustion chamber by compressing the fuel, comprising: a fuel supply unit which supplies the fuel to each cylinder of the internal combustion engine;a gas generating unit which generates hydrogen or reformed gas containing hydrogen as premixed gas from the fuel;a gas supply unit which supplies the premixed gas to each cylinder of the internal combustion engine;a required torque calculating unit which calculates required torque, as torque that should be outputted by the internal combustion engine, based on an accelerator angle and revolution speed of the internal combustion engine;a fuel injection quantity calculating unit which calculates fuel injection quantity, as quantity of the fuel to be injected into each cylinder, based on the revolution speed of the internal combustion engine and the required torque calculated by the required torque calculating unit;a fuel supply control unit which controls injection timing and injection time of the fuel injected by the fuel supply unit into each cylinder based on PCCI (Premixed Charge Compression ignition) combustion conditions of the internal combustion engine and the fuel injection quantity calculated by the fuel injection quantity calculating unit;a hydrogen addition concentration-related combustion data storage unit which stores combustion data related to hydrogen addition concentration previously obtained from multiple combustion waveforms changing depending on the hydrogen addition concentration, the combustion data using operational status information on the internal combustion engine, including at least the revolution speed of the internal combustion engine and the required torque calculated by the required torque calculating unit, as parameters;a hydrogen addition quantity determining unit which determines the quantity of the hydrogen to be supplied to each cylinder of the internal combustion engine by calculating a target hydrogen addition concentration achieving optimum thermal efficiency of the internal combustion engine by referring to the operational status information on the internal combustion engine and using the combustion data related to the hydrogen addition concentration stored in the hydrogen addition concentration-related combustion data storage unit; anda gas supply control unit which controls injection timing and injection time of the premixed gas injected by the gas supply unit into each cylinder based on the PCCI combustion conditions of the internal combustion engine and the quantity of the hydrogen to be supplied to each cylinder determined by the hydrogen addition quantity determining unit,wherein the gas supply unit includes: a gas compressor which compresses the premixed gas generated by the gas generating unit;a pressure accumulator tank which stores the compressed premixed gas in a pressure-accumulated state; andgas injection valves each of which injects the premixed gas supplied from the pressure accumulator tank via each gas supply pipe branching into each cylinder of the internal combustion engine. 14. The control device for an internal combustion engine according to claim 13, wherein the operational status information on the internal combustion engine includes at least the revolution speed of the internal combustion engine and the required torque. 15. The control device for an internal combustion engine according to claim 13, further comprising an exhaust NOX concentration storage unit which stores exhaust NOX concentration data previously estimated corresponding to at least the operational status information on the internal combustion engine and the injection timing of the fuel, wherein after the determination of the target hydrogen addition concentration achieving the optimum thermal efficiency of the internal combustion engine by the hydrogen addition quantity determining unit, the fuel supply control unit determines the injection timing of the fuel by referring to the operational status information on the internal combustion engine and using the exhaust NOX concentration data stored in the exhaust NOX concentration storage unit. 16. The control device for an internal combustion engine according to claim 15, wherein the operational status information on the internal combustion engine includes at least the revolution speed of the internal combustion engine and the required torque.
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Ulrey, Joseph Norman; Pursifull, Ross Dykstra, Engine with gaseous and/or liquid fuel injector.
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Watanabe, Yoshimasa; Konomi, Toshiaki; Omae, Kazuhiro, Fuel feeding device for engine.
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Shinagawa,Tomohiro; Atsumi,Takashi, Hydrogen-fueled internal combustion engine.
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Shinagawa,Tomohiro; Okumura,Takeshi, Hydrogen-used internal combustion engine.
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Klenk, Martin; Gerhardt, Juergen, Method and device for operating an internal combustion engine using a plurality of fuels.
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Kakegawa Toshiaki (Tsukuba JPX) Furuhama Shoichi (Tokyo JPX), Method to decrease black smoke of diesel.
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Lund, Morten A., Multi fuel co-injection system for internal combustion and turbine engines.
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Lange,David, System and method for operating an internal combustion engine with hydrogen blended with conventional fossil fuels.
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Moscherosch, Ben W.; Marriott, Craig D.; Cowgill, Joshua, Multi-fuel vehicle fuel control systems and methods.
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Cowgill, Joshua; Moscherosch, Ben W., System and method for adjusting fuel mass for minimum fuel injector pulse widths in multiple fuel system engines.
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