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Lean-burn gas duel-fuel spark-ignition-type internal combustion engine based on EGR system and control method

An internal combustion engine, ignition-type technology, applied in fuel injection control, electrical control, engine control, etc., can solve problems such as high NOx emissions and unstable combustion

Inactive Publication Date: 2015-12-02
JILIN UNIV
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Problems solved by technology

[0005] The invention relates to a lean-burn gas dual-fuel ignition type internal combustion engine based on an EGR (exhaust gas recirculation) system and a control method, which can solve the problems of unstable combustion and high NOx emissions generated when the gas fuel ignition type internal combustion engine performs lean combustion

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  • Lean-burn gas duel-fuel spark-ignition-type internal combustion engine based on EGR system and control method
  • Lean-burn gas duel-fuel spark-ignition-type internal combustion engine based on EGR system and control method
  • Lean-burn gas duel-fuel spark-ignition-type internal combustion engine based on EGR system and control method

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Embodiment Construction

[0026] The injection quantities of the two fuels in the internal combustion engine are all realized by controlling the injection pressure and the injection pulse width. When the injection pressure and the injection pulse width are constant, the injection quantity is constant, and then the MAP map is created and stored through a calibration test. in the control system.

[0027] Such as figure 1 As shown, the lean gas dual-fuel ignition type internal combustion engine based on the EGR system is characterized in that the internal combustion engine consists of an intake system, an ignition system, a first fuel supply system, a second fuel supply system, an exhaust system, an EGR system, an ignition type The internal combustion engine and the electronic control system of the internal combustion engine are composed; the air intake system is composed of the intake port 2, the intake manifold 15, the throttle valve 1 and the control circuit 17; the ignition system is composed of the s...

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Abstract

The invention relates to a lean-burn gas duel-fuel spark-ignition-type internal combustion engine based on EGR (Exhaust Gas Recirculation) system and a control method, and can solve the problems of unstable combustion, high NOx emission and the like of a gas fuel spark-ignition-type internal combustion engine caused during lean burn. Based on the in-fuel-gas-cylinder direct injection and inlet duct spray combined duel-fuel spark-ignition-type internal combustion engine technology and the EGR technology, the internal combustion engine and the control method ensure that the duel-fuel spark-ignition-type internal combustion engine can realize stable and efficient lean burn and reduce the phenomena of cyclical variation and fire accident at a high compression ratio; meanwhile, part of exhaust gas is re-guided into the cylinder to participate in combustion, the EGR ratio is changed according to the requirements of working conditions, the in-cylinder combustion temperature is lowered, and the generation of NOx is inhibited; and besides, as lean burn and EGR co-exist, the opening degree of a throttle valve can be increased and the pumping loss is reduced. In conclusion, reduction of energy consumption and super-low emission of pollutants can be fundamentally realized.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to the application of EGR in a lean-burn gas dual-fuel ignition type internal combustion engine. Background technique [0002] With the development of the automobile industry, the number of automobiles in the market is increasing, the application of internal combustion engines is more extensive, and the demand for oil continues to increase, especially today when oil is highly dependent on foreign countries. This is not only detrimental to the country's energy security, And discharge a large amount of tail gas, cause serious air pollution. In response to the above problems, the country has also gradually increased the requirements for energy conservation and emission reduction, which has become one of the important factors affecting the automobile industry. [0003] In this environment, gas alternative fuels such as natural gas and liquefied petroleum gas have at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B69/02F02M21/02F02M25/07F02D41/30F02D41/00
CPCY02T10/30
Inventor 于秀敏牛仁旭李润增杜耀东顾家旗刘林吴海明孙平董伟何玲
Owner JILIN UNIV
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