Air-assisted injection system for engine, cold start control method and vehicle

Abstract

The invention provides an air auxiliary injection system for an engine, a cold start control method and a vehicle, belonging to the field of engine control. The air-assisted injection system includes: a plurality of fuel injectors, each of which is provided with an air channel and an air escape port, and the air escape port is controlled to communicate with or block the outside world; and an air supply unit connected to the air duct, and the air-assisted injection system is configured to activate the hot air supply unit and open the air escape opening when receiving a preheating start command, so that the hot air The supply unit supplies heated air to each of the injectors to discharge cool air from the air escape port, and closes the air escape port upon receiving a warm-up end instruction. The air auxiliary injection system, the cold start control method and the vehicle of the present invention can ensure the successful cold start of the vehicle.

Description

technical field [0001] The invention belongs to the field of engine control, and in particular relates to an air auxiliary injection system for an engine, a cold start control method and a vehicle. Background technique [0002] For the problem of low-temperature cold start of methanol heavy trucks, the existing solution is: a small amount of methanol fuel is burned in the micro-burner to generate high-temperature flue gas, and then mixed with gas turbine intake, thereby increasing the temperature of the entering gas air, solving the problem of automobile Cold start problem. The scheme mainly includes: 1. When methanol flows through the channel of the preheating evaporator, it is preheated and evaporated into gas, and then passes through the inner injector to form a methanol steam jet; 2. The steam jet is injected into the vortex micro burner In the vortex generator, chemical reaction occurs with the air flowing in from the air inlet, and the diffusion combustion produces hi...

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Problems solved by technology

[0003] The above technical solutions can be used in small engines, but on heavy-duty engines, due to the large intake air volume per unit time and high intake pressure, it is difficult to increase the temperature in the intake manifold through the smoke heating solution, and the high-temperature smoke enters the intake manifold. The content of oxygen is diluted after the tube, which is very unfavorable for the combustion of heavy methanol engines

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