In-cylinder direct injection double-gas-fuel internal combustion engine capable of realizing ultra-lean combustion and control method

A dual gas fuel, lean burn technology, applied in fuel injection control, electrical control, engine control and other directions, can solve the problems of gasoline fuel combustion characteristics restricting air-fuel ratio, difficulty in further expanding the lean burn limit, and high pollution levels, and achieves a reduction in the future. The effect of burning hydrocarbons and carbon monoxide, reducing heat transfer losses, and meeting lean burn requirements

CN104948296AInactive Publication Date: 2015-09-30JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-09-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an in-cylinder direct injection double-gas-fuel internal combustion engine capable of realizing ultra-lean combustion and a control method, aims to solve the problems that combustion is unstable in an ultra-lean-combustion mode of a gas fuel spark ignition type internal combustion engine, the oil consumption is high and emission is heavy under the work conditions of cold start and small load and the like and develops a spark ignition type in-cylinder direct injection double-gas-fuel internal combustion engine capable of realizing ultra-lean combustion and a control method of the internal combustion engine. The internal combustion engine adopts an internal combustion engine technology combining in-cylinder direct injection and gas inlet channel injection based on double gas fuel, the internal combustion engine is provided with a gas flow control device which cooperates with a piston roof in a special shape, and accordingly, good mixed gas layering is realized. According to the special combustion characteristic of gas fuel, ultra-lean mixed gas in higher compression ratio can be adopted; gas flow movement of the mixed gas entering a cylinder is controlled, meanwhile, gas inflow is increased, ultra-lean combustion of the mixed gas in the cylinder is realized, the heat transfer loss is reduced, the heat efficiency is improved, and oil consumption and pollutants are reduced.
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Description

technical field

[0001] The invention relates to the technical field of internal combustion engines, in particular to an ultra-lean combustion direct-injection dual gas fuel internal combustion engine. It is suitable for vehicles with direct-injection ignition internal combustion engines with ultra-lean mixture gas and high compression ratio gas fuel. Background technique

[0002] With the depletion of traditional fossil energy and the rapid development of the automobile industry, the harmful gases emitted by automobiles after burning fossil fuels have caused more and more serious and irreversible pollution to the environment, posing a huge threat to human living environment and health. Therefore, we are looking for high-quality Alternative fuels for automobiles are gradually being valued by countries all over the world, and the country and the automobile industry have increasingly strict technical requirements for high-efficiency and energy-saving automobile internal combust...

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Embodiment Construction

[0033] The specific implementation manners of the present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0034] figure 1 It is the structural diagram of the direct-injection dual gas fuel ignition internal combustion engine system. This internal combustion engine system is made up of A fuel supply system, B fuel supply system, ignition system, air intake system, exhaust system, airflow control device, ignition type internal combustion engine 22 and internal combustion engine electric control system 29; 28. B fuel supply pipeline 25 and B fuel injector 5; A fuel supply system is composed of B fuel supply tank 27, B fuel supply pipeline 26 and B fuel injector 13; ignition system is composed of battery 30 and ignition circuit 31 Composed of spark plug 10; A fuel supply system, A fuel supply system and ignition system are connected to ignition type internal combustion engine 22 through A fuel injector 5, B fuel...