Novel two-stroke gasoline engine silencer

Abstract

The invention discloses a novel two-stroke gasoline engine silencer and belongs to the technical field of air exchange of a gasoline engine. The novel two-stroke gasoline engine silencer comprises a left shell, a right shell, a middle partition, an air storage cavity, a flow distribution plate, a flow guide cover, an exhaust flange, a supporting column and an exhaust pipe. The closed air storage cavity with certain volume and shape is added inside or outside the silencer, so that waste gas entering the closed air storage cavity generates exhaust resonant wave at specific frequency when encountering the inner wall of the air storage cavity, and the resonant wave is enabled to return to an air inlet of the exhaust flange from a moment when an air sweeping port is closed to a moment when an exhaust port is closed to conflict with waste gas and flammable mixed gas which are on the way of being discharged outwards so as to stop fresh unburnt mixed gas at an extra exhaust stage from being discharged. By the novel two-stroke gasoline engine silencer, short-out loss of exhausting can be lowered, tail gas emission is improved, fuel oil consumption is reduced, and fuel oil economy is improved.

Description

technical field [0001] The invention relates to the technical field of gasoline engine ventilation, in particular to a muffler device for reducing the emission of a two-stroke gasoline engine by using harmonic shock waves. Background technique [0002] Two-stroke engines are widely used in many product fields such as agriculture, forestry, gardening, and households due to their remarkable advantages such as compact structure, small size, light weight, and fast operation speed. [0003] In view of the fact that European and American countries are increasingly strict on engine exhaust emissions, gasoline engines entering the European and American markets in the future must comply with environmental protection emissions. The scavenging process of a two-stroke gasoline engine is divided into three stages: free exhaust, scavenging, and additional exhaust. Free exhaust stage: the exhaust port is opened until the fresh charge enters the cylinder. The exhaust port is generally open...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems of poor gas exchange quality, large short-circuit loss, and poor exhaust emission of two-stroke gasoline engines, the internal structure of the muffler was improved through the research and calculation of the exhaust pressure fluctuation effect, and a certain volume of airtight gas storage was added inside the muffler. The cavity produces exhaust harmonic waves of a specific frequency. The harmonic waves of this frequency affect the exhaust of the engine in the extra exhaust stage, reducing the discharge of fresh unburned mixture in this stage, reducing fuel consumption and improving exhaust gas emissions

Images