Multi-mode multi-fuel combustion system

Abstract

A multi-mode multi-fuel combustion system in the technical field of internal combustion engines, comprising: a diesel fuel tank, a diesel filter, a diesel high-pressure common rail injection system, a first auxiliary fuel tank, a first common rail gas port injection system, a second auxiliary fuel tank, Second common rail port injection system, cooled exhaust gas recirculation and electronic control unit. The invention can avoid the problems of ignition and combustion instability, poor combustion efficiency, and high emissions of hydrocarbons and carbon monoxide in the low-temperature cold start stage of the spark ignition combustion mode; it can realize smooth switching of various modes; as long as the existing engine is simply operated High-efficiency and ultra-low emissions in the full load range are achieved through technological transformation.

Description

technical field [0001] The invention relates to a system in the technical field of internal combustion engines, in particular to a multi-mode multi-fuel combustion system. Background technique [0002] The traditional diesel engine adopts the working mode of direct injection in the cylinder near the top dead center, high compression ratio, and spontaneous combustion. Features. The traditional gasoline engine adopts port injection homogeneous charge, low compression ratio, spark ignition, and most working conditions work under the condition of equivalence ratio. Combined with three-way catalysis, a very low emission level can be obtained, but the thermal efficiency is not high. On the other hand, due to the international energy shortage, countries around the world are developing and researching alternative fuels for internal combustion engines. Methanol, ethanol, butanol, natural gas, liquefied petroleum gas, and dimethyl ether have been extensively researched and initially ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a multi-mode multi-fuel combustion system, which can avoid ignition and combustion instability, poor combustion efficiency, hydrocarbon and carbon monoxide emissions in the low-temperature cold start stage of the spark ignition combustion mode high-efficiency problems; various modes can be switched smoothly; only a simple technical transformation of the existing engine is required to achieve high efficiency and ultra-low emissions within the full load range

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