Dual-fuel spark-ignition internal combustion engine based on variable air channel, and control method

Abstract

The invention designs a dual-fuel spark-ignition internal combustion engine based on a variable air channel, and a control method, aims at solving the problem that effective adjustment cannot be carried out on an intake flow and an airflow direction in an air channel, of an internal combustion engine adopting the traditional intake structure, and in particular, an internal combustion engine adopting a four-valve structure, and solving the problems of instable combustion, difficult ignition, fire and the like generated during lean combustion, and develops a dual-fuel spark-ignition internal combustion engine based on a variable air channel, and a control method. The invention provides a variable intake system. According to the variable intake system, the optimal airflow movement under different working conditions is obtained through control for the opening and closing of a swirl control valve, and in combination with a piston top surface with a special shape. The invention discloses a combined internal combustion engine technology for carrying out in-cylinder direct injection and intake channel injection respectively on the basis of two fuels. The different combustion modes of an in-cylinder mixed gas are realized through control for an injection time and an injection pulse width, and in combination with an airflow movement, and then the working efficiency of the internal combustion engine under different working conditions is improved, and oil consumption and emission are reduced.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to the application of variable gas passages in dual-fuel ignition internal combustion engines. Background technique [0002] In recent years, with the increasing number of automobiles and the continuous development of the automobile industry, the demand for oil has continued to increase. However, the environmental and energy problems caused by this have become more and more serious. Therefore, the formulation of automobile emission regulations in various countries is becoming more and more strict, and higher requirements are put forward for the economy of automobiles. [0003] In an internal combustion engine, the quality of the intake and exhaust system is one of the keys to determine the formation of the mixture, the quality of the combustion process and the replacement of the charge. The amount of air entering the cylinder and the flow state of the intake air...

AI Technical Summary

Problems solved by technology

[0007] The present invention designs a dual-fuel ignition-type internal combustion engine based on variable air passages and a control method thereof. At the same time, it solves the problems of unstable combustion, ignition difficulty and misfire caused by lean combustion, and develops an engine that can meet the requirements of different loads on the airflow movement mode in the cylinder. Dual fuel ignition type internal combustion engine and control method

Images