Control method and system for improving combustion stability of gasoline compression ignition under low load conditions

Abstract

The invention relates to a control method and system for improving the combustion stability of gasoline compression ignition under low-load conditions, belonging to the technical field of engines. It is characterized in that: the main air intake pipe (8) is connected with the intake heater (3) and the intake flow control valve (5) at the same time, and the intake heater (3) is connected in series with the intake heater flow control valve (2) The intake air flow control valve (5) is connected to the engine (16), and the in-cylinder pressure sensor (13) and in-cylinder direct injection injector (14) are installed in the variable valve (15), and the air intake heater flow control valve (2), intake heater (3), intake flow control valve (5), in-cylinder direct injection injector (14) and variable valve (15) are connected with the on-board computer (9). Through the control method and system for improving the combustion stability of gasoline compression ignition combustion under small load conditions, the combustion stability of gasoline compression ignition combustion mode under low load conditions is improved, and the problem of unstable combustion under low load conditions of gasoline compression ignition combustion mode is solved. .

Description

technical field [0001] The invention relates to a control method and system for improving the combustion stability of gasoline compression ignition under low-load conditions, belonging to the technical field of engines. Background technique [0002] With the rapid development of the national economy, the demand for engines in transportation, industry, agriculture and other industries continues to expand, and the negative effects of engines on energy and the environment are becoming increasingly prominent. The dual crises of energy and environment have forced domestic and foreign researchers to devote themselves to exploring technical means to achieve efficient and clean combustion of engines, so as to meet the increasingly stringent energy consumption and emission regulations. [0003] In recent years, new combustion methods characterized by "premixed, low-temperature combustion" have developed rapidly. Among them, the gasoline compression ignition (GCI) combustion method us...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide a method for improving the combustion stability of the gasoline compression ignition combustion mode under small load conditions, and to solve the problem of combustion instability of the current gasoline compression ignition combustion mode under small load conditions. Control method and system for improving combustion stability of gasoline compression ignition under low load conditions

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