Combustion chamber of gasoline direct injection engine

Abstract

The invention relates to a combustion chamber of a gasoline direct injection engine. The combustion chamber mainly comprises a combustion chamber top face, a combustion chamber curved top face, a combustion chamber inner wall face and a combustion chamber bottom face, five spiral flow guide faces are arranged on the combustion chamber inner wall face and the combustion chamber bottom face, the flow guide faces are in central symmetry with a protrusion of the combustion chamber bottom face, an oil sprayer is arranged over the protrusion, and spark plugs are arranged in front of and behind the oil sprayer respectively. In the operation process of the engine, fuel oil is injected into the combustion chamber through the oil sprayer, the fuel oil is guided to the flow guide faces at the bottom of the combustion chamber through the combustion chamber protruding structure, the fuel oil and air are mixed in the combustion chamber and upwards roll to the spark plugs through the spiral flow guide faces, the spark plugs flash over to ignite mixed gas, the two spark plugs are ignited at the same time, so that the combustion speed and ignition reliability are improved, the flame propagation speed is increased, and emission is reduced.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a combustion chamber of an in-cylinder direct injection gasoline engine. Background technique [0002] In-cylinder direct injection (GDI) engine can precisely control the fuel injection volume in the cylinder of the automobile engine, effectively control the mixing process of oil and gas in the cylinder, realize lean combustion, and improve the thermal efficiency and fuel economy of the engine. However, in-cylinder direct injection has brought problems such as fuel collision to a certain extent, and lean combustion is often accompanied by problems such as unreliable fire and high levels of particulate matter emissions, resulting in poor engine performance. [0003] The combustion chamber has an important influence on the mixing and combustion of oil and gas. Therefore, optimizing the structure of the combustion chamber and implementing a reasonable oil-gas cha...

AI Technical Summary

Problems solved by technology

The existing combustion chamber structure will cause fuel to accumulate after hitting the wall, thereby reducing the mixing rate of oil and gas and the combustion rate

In addition, the existing combustion chamber structure increases the amount of secondary fuel injection to ensure a richer mixture near the spark plug, which in turn increases the amount of oil film produced, leading to a series of problems such as increased fuel consumption and unburned CH

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