Device and method for rapidly pre-warming air-intake of gasoline engine cold-start

Abstract

The invention relates to a device and method for realizing fast preheating intake air of a gasoline engine at cold start. The device comprises: gasoline supply and injection unit, intake unit of preheating device, ignition electrode, combustion chamber, heat exchange device, shell, temperature sensors and electronic control units. The steps of the method are: obtain the temperature T of the intake pipe before starting; compare T with the preset value T1; when T≥T1, the engine starts according to the normal mode; Open, start; 5 seconds later, ignite and start to heat the intake air; obtain the heated intake pipe temperature T; compare T with the preset value T2; when T≥T2, stop injecting fuel into the combustion chamber; start the engine ; When T<T2, continue to supply fuel to the combustion chamber until T≥T2.

Description

technical field [0001] The invention relates to a device and a method for realizing rapid preheating of intake air at a cold start of a gasoline engine, and belongs to the technology of reducing emission at a cold start of a gasoline engine. Background technique [0002] In the emission cycle test, according to the US Environmental Protection Agency's federal government test procedures, nearly 80% of the HC and CO emissions of a gasoline engine equipped with a three-way catalytic converter are generated in the first few minutes of cold start. The high emission of gasoline engine cold start causes serious pollution of ambient air quality. Therefore, it is of great significance to reduce cold start emissions of gasoline engines. [0003] Air intake preheating is one of the effective measures to effectively reduce cold start emissions of gasoline engines. There are two types of air intake preheating: centralized preheating and cylinder-specific preheating. The centralized pr...

AI Technical Summary

Problems solved by technology

And all three kinds of preheating devices are used for gasoline engine air intake preheating and all have certain defects.

First of all, the three consume a lot of power, which will inevitably increase the consumption of the battery and cause the power of the battery itself to drop, which is very unfavorable to cold starting, affecting its life and even causing starting failure, which directly leads to an increase in cold starting emissions, especially at low temperatures. in this way

Secondly, both the electric heater and the electric flame preheater are locally heated, and the intake air temperature is not only heated unevenly but also drops after the engine is started.

In addition, the electric flame preheater uses diesel fuel, which is inconvenient to use on gasoline engines

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