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Miller cycle diesel oil-natural gas dual fuel engine and control method thereof

A dual-fuel engine, Miller cycle technology, applied in engine control, combustion engine, fuel injection control and other directions, can solve the problems of natural gas engine limitation, short cruising range, etc., to reduce heat load, improve expansion ratio, flexible and simple way Effect

Active Publication Date: 2016-08-24
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention is formed in view of the above situation, and the problem to be solved is: aiming at the problems of the natural gas engine being limited by the gas filling station and the short cruising range, solving the shortcomings of the existing dual-fuel engine implementation and performance, and providing a simple implementation, economical and environmentally friendly Miller cycle diesel-natural gas dual-fuel engine with the advantages of low thermal load and good durability

Method used

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  • Miller cycle diesel oil-natural gas dual fuel engine and control method thereof
  • Miller cycle diesel oil-natural gas dual fuel engine and control method thereof

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Embodiment Construction

[0021] Embodiments of the present invention will be described below with reference to the drawings.

[0022] The main structure of the main body of the diesel-natural gas dual fuel engine of the present invention includes 1. piston; 2. cylinder; 3. combustion chamber; 4. compressor; 5. turbine; 6. wastegate valve; 7. exhaust port; Gas valve; 9. Diesel control valve; 10. Fuel pressure sensor; 11. Fuel temperature sensor; 12. Gas mass flow sensor; 13. Gas supply valve; 14. Air intake pressure sensor; 15. Air inlet; 16. Inlet Air valve; 17. Fuel injector; 18. Air intake valve adjustment mechanism; 19. Fuel tank; 20. Load signal; 21. Speed ​​signal; 22. Engine monitoring system; 23. Electronic control unit; 24. Gas storage tank; 25. Gas pressure sensor; 26. Intercooler; 27. Air filter.

[0023] In the cylinder 2 of the engine, a reciprocating piston 1 is provided, and a combustion chamber 3 is formed between the upper surface of the piston 1 and the inner surface of the cylinder ...

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Abstract

The invention discloses a Miller cycle diesel oil-natural gas dual fuel engine and a control method thereof, and relates to the technical field of engines. An early closing mode of an intake valve is realized through adjusting an intake valve adjusting mechanism; and a compression ratio is changed to separate from an expansion ratio, so that the cooling of mixed gas is facilitated, the thermal load of the engine is reduced, the positive suction power is generated in the expansion process to improve the thermal efficiency of the engine, and the fuel economy is preferably improved. The new control method is used for converting high / low compression ratio more flexibly, so that the diesel oil-natural gas dual fuel engine can achieve high-efficiency combustion operation in a full-load range.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to a Miller cycle diesel-natural gas dual-fuel engine and a control method thereof. Background technique [0002] Due to the rapid development of modern industry, the price of traditional vehicle fuel continues to rise, and engine emission standards are becoming more and more stringent. The development of clean and economical gas engines has attracted more and more attention from the society. Using natural gas as engine fuel has become a research hotspot in research institutions in various countries. . However, natural gas engines have problems such as serious power drop, short cruising range, and the need to arrange reasonable refueling stations during use, while traditional diesel engines have large torque, sufficient power, and long cruising range. Therefore, both at home and abroad have been committed to researching an economical and environmentally friendly dual-fu...

Claims

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Application Information

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IPC IPC(8): F02B69/04F02D41/00F02D41/40F02D19/06F02D13/02F02B37/18
CPCF02B37/183F02B69/04F02D13/0226F02D19/06F02D41/0007F02D41/0025F02D41/401F02D41/403F02D2013/0292F02D2041/001Y02T10/12Y02T10/30
Inventor 高莹刘洪岐麻斌徐英健李君
Owner JILIN UNIV
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