Operation control method of a gasoline direct compression ignition engine

Abstract

The invention discloses an operation device of a direct gasoline compression ignition engine. According to the operation device, an electric heating plug is arranged in a cylinder; an air inlet by-pass pipe is arranged in an air inlet pipe passing through an intercooler in a bypassed mode; the flow direction of a pipeline is controlled by an air inlet control valve; an ECU judges the operation load of the engine according to a read rotation speed and a read accelerator position signal; when cold start is carried out, the electric heating plug is controlled to heat mixed gas in the cylinder, and high-temperature compressed air is controlled to be cooled without using the intercooler; when the load is small, a negative air valve overlapping angle mode is adopted to solve the problem that the gasoline compression ignition engine carries out partial combustion under a small-load working condition; when the load is medium, high-efficiency clean combustion of the gasoline compression ignition engine is realized by utilizing the collaborative control of internal EGR and external EGR; and when the load is high, small internal EGR and large external EGR are adopted to inhibit the maximum pressure rise rate in the cylinder. According to the operation device and a control method of the direct gasoline compression ignition engine, the high-efficiency clean combustion of the gasoline compression ignition engine in a wide load range can be realized, the fuel consumption rate is increased, and low emission of nitrogen oxide and carbon smoke is kept.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to an operating device and a control method for a gasoline direct compression ignition engine. Background technique [0002] With the development of gasoline engine technology and the stricter emission regulations, the existing gasoline engine technology poses more serious challenges. The current relatively advanced technologies, such as stratified lean-mixture combustion and in-cylinder direct injection of gasoline engines, as well as exhaust gas recirculation, exhaust gas catalytic conversion, etc., are difficult to meet the requirements of the new regulations. [0003] In recent years, in order to achieve new breakthroughs in gasoline engine technology in terms of performance and emissions, a gasoline compression ignition technology is being actively studied at home and abroad. Various technologies such as homogeneous mixture compression ignition combustion (...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide an operating device and a control method for a gasoline direct compression ignition engine, to solve the problem of difficult starting during cold start; to solve the problem of partial combustion under low load conditions; Solve the problem of knocking under heavy load conditions

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