Combustion system control method, combustion system and engine

Abstract

The invention relates to the technical field of engines, and specifically discloses a combustion system control method, a combustion system and an engine. The combustion system control method includes: injectors perform the first main injection and the second main injection at intervals, and the injection The fuel injector injects fuel to the first arc ridge during the first main injection; the fuel injector injects fuel to the second arc ridge during the second main injection. By adopting a combustion chamber with two arc ridges, and injecting fuel to the two arc ridges respectively through the injector, it can ensure that the amount of fuel shared by each arc ridge is reduced, and it can avoid more fuel accumulation at a single arc ridge. It is beneficial to play the role of arc ridges in improving the velocity field of the jet flow at the end of the oil beam; and guide and distribute the fuel of the two main injections through two arc ridges, which facilitates the distribution of oil and gas in the cylinder and improves the utilization of air in the cylinder cavity rate, and improve combustion efficiency, thereby improving the thermal efficiency of the engine.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a method for controlling a combustion system, a combustion system and an engine. Background technique [0002] The combustion organization of existing diesel engines is mainly based on diffusion combustion, and the combustion speed is largely limited by the mixing speed of oil and gas. In addition, at this stage, high-pressure common rail diesel engines all use one main injection. The entrainment effect of a single high-pressure injection mainly occurs in the atomization area, and the entrainment effect is weakened in the middle of the oil beam, and the oil-gas mixing effect is poor. Most of the combustion chambers adopt a single-step arc ridge structure, and the amount of fuel distributed at the end of the oil beam is relatively large, especially the accumulation of fuel at the arc ridge, which cannot effectively improve the impact of the arc ridge on the jet velocity field at t...

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Problems solved by technology

[0003] The object of the present invention is to provide a method for controlling the combustion system, the combustion system and the engine, so as to solve the problem that the combustion system in the related art usually adopts a single main injection, which is not conducive to the sufficient mixing of oil and gas.

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