Air-replenishing scavenging engine

Abstract

The invention provides an air-replenishing scavenging engine, which comprises a cylinder with a scavenging passage, an exhaust port and an air inlet, a crankshaft which is connected with a piston in the cylinder, and a crankshaft case which is used for installing the crankshaft. The air-replenishing scavenging engine additionally comprises a one-way air replenishing valve which is arranged on the external side of the top opening of the scavenging passage and is conducted from the external part to the internal side of the scavenging passage. During working, the piston moves up, the crankshaft case generates negative pressure, the one-way air replenishing valve is opened and air enters the scavenging passage; the piston moves down, the pressure of the crankshaft case is increased, the one-way air replenishing valve is closed and the air is pressed to the top of the scavenging passage by mixed oil gas; the piston moves down till the exhaust port is opened, most waste gas is exhausted; and the piston continuously moves down, the opening of the scavenging passage which is communicated with the end of a combustion chamber is opened, compressed air enters the combustion chamber to scavenge the unexhausted waste gas to the exhaust port and forms an isolating layer between mixed oil gas which subsequently enters the combustion chamber and the waste gas, the mixed oil gas which is not combusted is effectively prevented from being exhausted together with the waste gas, the loss of fuel oil is reduced and the original emission value of tail gas emission is reduced.

Description

technical field [0001] The invention relates to the technical field of engine emission reduction, and more specifically, relates to a supplementary air scavenging engine. Background technique [0002] An engine, also known as an engine, is a machine that converts another form of energy, usually chemical energy, into mechanical energy, such as a gasoline engine. Because gasoline has low viscosity and evaporates quickly, the gasoline injection system can be used to inject gasoline into the cylinder, and after being compressed to a certain temperature and pressure, it is ignited with a spark plug to make the gas expand and do work, so as to convert chemical energy into mechanical energy. The gasoline engine is characterized by high speed, simple structure, light weight, low cost, stable operation, and convenient maintenance, so it is very popular and widely used in cars, especially small cars, and gradually in recent years. It is widely used in hand-operated power machinery su...

AI Technical Summary

Problems solved by technology

In the existing technology, when the gasoline engine exhausts the exhaust gas, the internal pressure of the exhaust gas decreases, and the exhaust gas cannot be discharged cleanly, so the unburned mixed oil gas needs to enter the cylinder to sweep the exhaust gas out from the exhaust port, but the unburned mixed oil gas Oil and gas will be discharged together with the exhaust gas, which leads to high fuel consumption rate and serious exhaust pollution, which affects people's health. Today, with the increasingly stringent requirements for energy saving and environmental protection, effective measures must be taken to overcome its weaknesses in order to be better. good strengths and avoid weaknesses

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