Top fire room combstion system for gasoline engine piston

Abstract

The invention relates to a kind of ignition room burning system that can utilize direct-spraying petrol machine piston roof with high compression ratio and high empty-burning ratio, which belogns to the field of forming and burning of motor combination gas. When the piston is around the to pstop point, the small burning room on the to pof the piston and the cylinder head compose the ignition room, the big burning room and the cylinder head compose the main burning room. The assistnig oil bunches from petrol spray nozzle get into the ignition room installed on the air cylinder set and form over-dense combination gas, while the main oil bunch just forms sparse combination gas in the main burning room. The swift burning high temperature and high pressure gas from the burnt dense combination gas rush into the main burning room through passage, then mix and burn for the second with the sparse combination gas in the main burning room, thus realize the swift and complete burning of high compression ratio and high empty-burning ratio. Through it utilizes high compression ratio, the total empty-burning ratio is still great, thus, in case of guaranteeing the light, it improves the economoy of the engine and the exhaust pollution.

Description

technical field [0001] The invention relates to a direct-injection gasoline engine piston apex fire chamber combustion system that can adopt high compression ratio and high air-fuel ratio, which belongs to the field of engine mixture gas formation and combustion. Background technique [0002] As we all know, gasoline is a highly volatile fuel that is difficult to spontaneously ignite, so gasoline engines have always used a homogeneous mixture and ignited by an external source. In this way, there are two problems: one is that the gas mixture range is narrow during operation, α = 0.6 ~ 1.2 (A / F = 9 ~ 18), and often works under the rich mixture gas of α < 1, which will inevitably make the gasoline engine poor in economy. And generate a lot of HC and CO; Second, both theory and practice have proved that increasing the compression ratio is the most effective way to improve the thermal efficiency of gasoline engines, but it is limited by abnormal combustion such as deflagration...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned problems of narrow gas mixture concentration range and the inability to use higher compression ratios in gasoline engines, the present invention provides a gasoline engine piston apex fire chamber combustion system. The low air-fuel ratio ensures normal ignition and rapid combustion to achieve the purpose of improving the thermal efficiency of gasoline engines and reducing exhaust pollution

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