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

A natural gas and engine technology, applied in the field of gasoline and natural gas dual-fuel dual-injection engines, can solve the problems of high emission of unburned methane, slow combustion rate, low compression ratio, etc., and achieve the goals of improved thermal efficiency, low development cost and saving oil resources Effect

Inactive Publication Date: 2015-07-29
SHANGHAI JIAO TONG UNIV
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  • Abstract
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Problems solved by technology

However, for natural gas engines converted from traditional gasoline engines, there are problems such as too low compression ratio, too slow combustion rate, and too high emissions of unburned methane.

Method used

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

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Embodiment

[0011] Such as figure 1 As shown, the present invention includes a gasoline fuel tank 1, a cooling water temperature sensor 8, a knock sensor 9, an air mass flow sensor 10, an intake pipe 11, an electronic throttle valve 13, a spark plug 15, an electronically controlled gasoline injector 16, and an exhaust pipe 17. Particulate filter 18, three-way catalytic converter 19, gasoline high-pressure oil pipe 20, gasoline high-pressure oil rail 21, gasoline high-pressure oil pump 22, gasoline oil return pipe 23, gasoline filter 24, air-fuel ratio sensor 25, intake air temperature Pressure sensor 26, natural gas storage tank 2, natural gas high pressure stop valve 3, natural gas pressure reducing valve 4, natural gas low pressure stop valve 5, natural gas injection rail 6, electronic control unit 7, natural gas pipeline 12, electronically controlled natural gas injector 14 , the cooling water temperature sensor 8 and the knock sensor 9 are respectively arranged on the engine body, the...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B69/04F02B75/10F02D15/00F02D19/08
Inventor 吕兴才钱勇
Owner SHANGHAI JIAO TONG UNIV
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