Compression ignition jet ignition combustion system and combustion control method

Abstract

The invention relates to the technical field of gasoline engine combustion control methods, and particularly relates to a compression ignition jet ignition combustion system and a combustion control method. In the compression ignition jet ignition combustion system, a manifold oil injector and a direct injection oil injector jointly form a double-injection structure, and a sparking plug does not need to be arranged in the combustion system. An injection opening of the manifold oil injector of the combustion system is connected with an air inlet channel; and a jet chamber is arranged in a maincombustion chamber, an injection opening of the direct injection oil injector is connected with the jet chamber, and the jet chamber is used for enabling fuel oil injected by the direct injection oilinjector to be compressed and ignited to form compression ignition fuel gas and dispersing the compression ignition fuel gas into the main combustion chamber. According to the combustion system, on the basis of an existing engine, complex structure modification is not needed, cost is low, combustion stability is guaranteed, and robustness is high; and compared with a traditional flame jet combustion mode in the prior art, the combustion temperature is lower, nitrogen oxide emission in the engine is reduced, the burden of a lean-burn catalyst is relieved, and time-sharing and partition-controllable spontaneous combustion of the jet chamber and the main combustion chamber is achieved.

Description

technical field [0001] The invention relates to the technical field of gasoline engine combustion control methods, in particular to a compression ignition jet ignition combustion system and a combustion control method. Background technique [0002] Energy-saving and emission-reducing automotive engines have long been a theme. Gasoline engine is the main force of passenger car engine, and its high-efficiency and clean combustion to achieve extreme thermal efficiency has become a research hotspot in recent years. Under the technical background of the increasingly obvious trend of electrification, hybrid technology makes it possible to apply some new combustion methods in traditional gasoline engines in the environment of hybrid vehicles. Major car companies and related research institutes are actively developing hybrid gasoline engines. . [0003] With the assistance of the motor, the speed and load of the gasoline engine are decoupled from the vehicle speed and power demand...

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Problems solved by technology

[0006] The embodiment of the present invention provides a compression ignition jet ignition combustion system and a combustion control method, which are used to solve the problem that the spark ignition in the existing combustion system is affected by the lean burn limit, which is prone to large cycle fluctuations, and the turbulent jet ignition is difficult to start. , high nitrogen oxide emissions defects

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