Four-stroke gasoline engine exhaust displacement device and gasoline engine

Abstract

The invention relates to the technical field of automobile engines, in particular to a four-stroke gasoline engine exhaust displacement device, which comprises a piston cylinder, and a displacement valve and a charging device, wherein a cylinder body is provided with an intake valve, an exhaust valve, an intake pipe and an exhaust pipe, the displacement valve and the charging device are arranged on the cylinder body, the charging device comprises a displacement valve control device, a booster pump and a pressure vessel, a booster pump inlet is communicated with the atmosphere, and a booster pump outlet is connected with an air inlet of the displacement valve and is provided with the pressure vessel; the displacement valve control device comprises a drive device synchronized with an exhaustvalve control cam. The invention also discloses a gasoline engine comprising an engine block, four piston cylinders in the engine block, and the engine exhaust displacement device. The engine exhaustdisplacement device has the beneficial effect that the effective volume of a combustion chamber of the engine can be effectively increased by the sufficient discharge of exhaust generated during eachcombustion, thereby improving the overall driving capability.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to a four-stroke gasoline engine exhaust gas replacement device and an engine. Background technique [0002] The four-stroke engine belongs to the reciprocating piston internal combustion engine. According to the type of fuel used, it is divided into three categories: gasoline engine, diesel engine and gas fuel engine. Piston internal combustion engines fueled by gasoline or diesel are called gasoline engines or diesel engines, respectively. Taking a piston cylinder of a gasoline engine as an example, its working process has four strokes; they are power stroke, exhaust stroke, intake stroke, and compression stroke; the rotation angles corresponding to the engine crankshaft are 1-180 degrees, 180-360 degrees, 360-540 degrees, 540-720 degrees, that is, the crankshaft completes a work process every two revolutions; in a four-stroke gasoline engine, the combustible mixture e...

AI Technical Summary

Problems solved by technology

In the exhaust stroke, when the piston moves to the top dead center, the exhaust stroke is about to end, and the exhaust valve is closed, there will be a certain amount of exhaust gas remaining in the top combustion chamber. If there is exhaust gas remaining, the subsequent effective combustible mixture capacity will actually be reduced. Small, resulting in loss of power stroke power

If these exhaust gases can be completely discharged, it will actually increase the working capacity of each compression, or increase the next intake capacity

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