Control method and system for improving combustion stability of gasoline compression ignition in small-load working condition

Abstract

The invention discloses a control method and system for improving combustion stability of gasoline compression ignition in a small-load working condition, and belongs to the technical field of engines. The system is characterized in that a main gas inlet pipe (8) is simultaneously connected with a gas inlet heater (3) and a gas inlet flow control valve (5), the gas inlet heater (3) is connected with a gas inlet heater flow control valve (2) in series, then the gas inlet heater (3) and the gas inlet flow control valve (5) are connected with an engine (16), an in-cylinder pressure sensor (13) and an in-cylinder direct injection oil injector (14) are installed in a variable valve (15), and the gas inlet heater flow control valve (2), the gas inlet heater (3), the gas inlet flow control valve(5), the in-cylinder direct injection oil injector (14) and the variable valve (15) are connected with a vehicle-mounted computer (9). Through the control method and system for improving the combustion stability of the gasoline compression ignition in the small-load working condition, the combustion stability of a gasoline compression ignition combustion mode in the small-load working condition isimproved, and the problem that at present, combustion of the gasoline compression ignition combustion mode in the small-load working condition is unstable 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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