Gasoline and natural gas double-fuel double-jetting type engine

Abstract

The invention discloses a gasoline and natural gas double-fuel double-jetting type engine and belongs to the technical field of internal combustion engines. The gasoline and natural gas double-fuel double-jetting type engine comprises a gasoline tank, an electrically controlled gasoline injector, a natural gas storage tank, a natural gas high-pressure stop valve, a natural gas reducing valve, a natural gas low-pressure stop valve, a natural gas jetting rail, an electronic control unit, and an electrically controlled natural gas injector. The electrically controlled natural gas injector is arranged on a gas inlet pipe behind an electronic gas throttling door; the natural gas jetting rail is connected with the electrically controlled natural gas injector through a natural gas pipeline. On one hand, the engine can use gasoline and natural gas at the same time, and can jet two fuels sequentially within a cycle; on the other hand, the engine can adopt a high compression ratio and ternary catalysis post-processing device to realize the purposes of high heat efficiency and nearly no particle discharge at the same time. The gasoline and natural gas double-fuel double-jetting type engine is rational in design, simple in structure and suitable for optimized design of double-fuel engines.

Description

technical field

[0001] The invention relates to an engine in the technical field of internal combustion engines, in particular to a gasoline and natural gas dual-fuel dual-injection engine capable of sequentially injecting two fuels within one cycle. Background technique

[0002] Traditional gasoline engines use port injection of homogeneous charge (or direct injection of stratified mixture), low compression ratio, spark ignition, and large throttle throttle loss under partial load. Due to the existence of flame propagation, the flame front produces more nitrogen. oxide. Gasoline engines are characterized by low thermal efficiency and high emissions of carbon monoxide and hydrocarbons. However, since gasoline engines operate under stoichiometric conditions in most operating conditions, the use of three-way catalysis can achieve very low emission levels. Therefore, the main problem for gasoline engines is how to improve and increase the effective thermal efficiency of the e...

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