Gasoline homogeneous charge compression ignition engine system capable of achieving high heat efficiency and low emission and method

Abstract

The invention discloses a gasoline homogeneous charge compression ignition engine system capable of achieving high heat efficiency and low emission and a method. The system comprises a compound variable pressurization system, an exhaust gas recirculation system, a variable effective compression ratio system and a fuel injection system, wherein the compound variable pressurization system comprisesa variable two-stage pressurization system, a power turbine system, an electric pressurization system, and an intake intercooler, the variable two-stage pressurization system comprises a high pressurestage turbocharger, a low pressure stage turbocharger, and an interstage intercooler, the power turbine system comprises a power turbine, an exhaust control valve, a high speed generator, and an exhaust bypass valve, the electric pressurization system comprises an electric compressor, an intake control valve, a motor, an electric compressor bypass valve, and the exhaust gas recirculation system comprises an EGR valve, an EGR intercooler, and an exhaust backpressure valve. The invention further provides the control method. The problem that gasoline homogeneous charge compression ignition is difficult to control is solved.

Description

technical field [0001] The present invention relates to an engine system and method, and more particularly, to a gasoline homogeneous compression ignition engine system and method capable of realizing high thermal efficiency and low emission. Background technique [0002] Environmental pollution, greenhouse effect, energy crisis and other issues are getting more and more attention in today's era. While achieving low emissions, internal combustion engines further improve their thermal efficiency has become the most important direction for the development of internal combustion engine technology, and the research and development of high thermal efficiency internal combustion engines has become a hot issue. After more than 100 years of development and improvement, it is also a challenging problem to further improve thermal efficiency. [0003] In the prior art, Daw et al. of Stanford University designed an engine with an ultra-high compression ratio of 100, which can create a h...

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Problems solved by technology

However, the system design that comprehensively utilizes the above technologies, as well as the proposal and clarification of the cooperative control method have not yet been seen.

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