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Gasoline engine combustion control method and gasoline engine suitable for medium and heavy vehicle

A gasoline engine and control method technology, applied in the direction of engine components, engine operation, combustion engine, etc., can solve the problems of reducing the speed of flame propagation, increasing cycle fluctuations, etc., and achieve the effects of reducing heat transfer, reducing combustion temperature, and accelerating mixing

Pending Publication Date: 2018-11-20
TIANJIN UNIV
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AI Technical Summary

Problems solved by technology

However, since the use of high-concentration EGR usually reduces the flame propagation velocity and increases cycle fluctuations, it is necessary to use other methods to accelerate the combustion velocity, thereby improving the tolerance of EGR under partial load conditions

Method used

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  • Gasoline engine combustion control method and gasoline engine suitable for medium and heavy vehicle

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Experimental program
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Effect test

Embodiment 1

[0042] Small and medium load conditions:

[0043] The electronic controller 19 collects the engine speed signal i, the intake air flow signal a, and the manifold pressure sensor signal b, and analyzes and judges the load rate of the engine. When the engine load is 10%, the electronic controller 19 sends out the injector The pulse width signal e and the water injector pulse width signal d respectively control the fuel injector 4 of each cylinder to open, the water injector 6 installed on each intake manifold to close, and adjust the common rail pressure to 500bar to realize gasoline super High-pressure injection, and through the EGR valve opening signal g, the EGR valve 16 installed on the exhaust gas recirculation pipeline between the exhaust manifold 14 and the intake manifold 9 is controlled to open and adjust the opening, and the exhaust gas is introduced into the intake manifold 9, so that The EGR rate is controlled at 5%; the electronic controller 19 sends the oxygen sens...

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PUM

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Abstract

The invention discloses a gasoline engine combustion control method and a gasoline engine suitable for a medium and heavy vehicle. On a traditional diesel engine platform, a gas inlet sprinkler systemand a spark plug are reconstructed and additionally mounted on the basis of a gas inlet channel and a cylinder cover, meanwhile, a set of EGR system is arranged in a matched mode, so that the modified gasoline engine adopts EGR strategy in the small and medium load working conditions and adopts EGR and gas inlet channel and sprinkler coupling strategies in the heavy load condition. The problem oflow displacement and low thermal efficiency of a traditional gasoline engine can be overcome, the detonation can be suppressed through EGR coupling gas inlet channel and sprinkler in the heavy load condition, the range of efficient clean combustion can be effectively widened, so that the application need in the medium and heavy vehicle can be met, and meanwhile, the strict emission regulations can be met by using a ternary catalytic converter.

Description

technical field [0001] The invention relates to a combustion control method suitable for a gasoline engine, in particular to a combustion control method for a gasoline engine of a medium-heavy vehicle and an engine suitable for the method. Background technique [0002] In recent years, according to the development trend of truck energy diversification and the good application prospects of gasoline-fueled trucks, it is necessary to develop and optimize gasoline engines and extended-range hybrid power systems for medium and heavy vehicles. However, the development and optimization of gasoline engines for medium- and heavy-duty vehicles are not sufficient at present. The traditional gasoline engines have low displacement and cannot meet the needs of the medium- and heavy-duty vehicle market. [0003] With reference to the design of natural gas heavy-duty spark ignition engines, if gasoline ignition and combustion can be realized on a diesel engine platform, using the characteri...

Claims

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Application Information

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IPC IPC(8): F02B47/02F02M26/16F02M26/20
CPCF02B47/02F02M26/16F02M26/20Y02T10/12
Inventor 尧命发赵旭敏王浒郑尊清何适
Owner TIANJIN UNIV
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