Gasoline engine EGR stratified charge system based on flow guiding plate

Abstract

The invention discloses a gasoline engine EGR stratified charge system based on a flow guiding plate, and belongs to the technical field of engines. An exhaust pipe is fixedly connected with an intake manifold through a bypass pipe, an EGR valve, an EGR cooler and an EGR loop. An airflow cavity in the air inlet side of a cylinder cover part is respectively and correspondingly connected with an airflow cavity of an air inlet diverting cavity part, an air inlet of the cylinder cover part corresponds to branch pipes of the air inlet diverting cavity part, a throttle valve is fixedly connected with an intake manifold hole through the intake manifold, and the exhaust branch pipes of the exhaust pipe are correspondingly connected with four exhaust ways of the cylinder cover part respectively. Waste gas and fresh air can be prevented from being early mixed outside a combustion chamber and can also be prevented from being accumulated and mixed when an air inlet door is closed, the equipressure air intake of the fresh air and the pressure can be achieved, the mixed degree of the fresh air and the waste gas can be reduced, the load control of an engine can be achieved, the circulation thermal efficiency of a gasoline engine is improved, high EGR efficiency can be achieved, and the combustion economical efficiency of the gasoline engine is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of engines, more precisely, the invention relates to a gasoline engine EGR stratified air intake system based on a deflector plate. Background technique [0002] Petroleum, a non-renewable resource, occupies an important part of the world's energy structure, and my country's dependence on petroleum resources is also increasing year by year. According to statistics, my country's annual automobile oil consumption accounts for about 50% of the country's annual oil consumption. Therefore, the realization of energy-saving technological innovation in the automobile industry will make a significant contribution to my country's energy-saving and emission-reduction strategy. [0003] Compared with diesel engines, gasoline engines are widely used in passenger car engines due to their advantages of small weight, low price, and low vibration and noise. It has higher pumping loss and smaller compression ratio, thus has ...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the low tolerance of gasoline engine homogeneous EGR, the difficulty in realizing the EGR tumble flow stratification in the gasoline engine cylinder and the influence of the duct introduction on the charge coefficient in the prior art, and proposes a drainage plate-based Gasoline engine EGR stratified intake system

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