A two-stroke engine with additional pulse exhaust

Abstract

The invention provides a two-stroke engine with additional pulse exhaust, which is used to solve the problems of low engine ventilation efficiency, high exhaust pollutants and high fuel consumption in the prior art. The two-stroke engine with additional pulse exhaust includes a main scavenging port, a secondary scavenging port, an exhaust port, a pulsed exhaust port, a main scavenging channel, an exhaust channel, a pulsed exhaust channel, a secondary scavenging channel, and a pulsed exhaust port. The channels are symmetrically arranged on both sides of the exhaust channel, gradually expanding to the center of the exhaust channel, and when gradually expanding to the exhaust port, the cross-sectional area of ​​the pulse exhaust channel is 1.8 to 2.6 times the area of ​​the pulse exhaust port. Negative pressure is formed through the pulse exhaust channel and the gradual expansion hole of the pulse exhaust port to reduce the discharge of fresh air. The two-stroke engine with additional pulse exhaust of the present invention is close to complete scavenging during the whole ventilation process, reduces short-circuit loss, effectively improves the fuel economy and power of the engine, and reduces the emission of HC and other exhaust gas pollutants.

Description

technical field [0001] The invention belongs to the field of engine equipment, and in particular relates to a two-stroke engine with additional pulse exhaust. Background technique [0002] The exhaust port and the air intake port are the key parts of the engine, which have an important impact on the performance and life of the engine. Common two-stroke engine exhaust port shapes are square, oval, round, double rectangular, double parallelogram, etc. [0003] In the prior art, the two-stroke engine realizes intake and exhaust through the ventilation process, and completes the conversion of thermal energy into mechanical energy. During the ventilation process of ordinary stroke cycle, the exhaust port has good craftsmanship, but the stroke loss is large; the tendency of the piston ring to bounce into the air port is small, and the stroke loss is small when the air port height is the same, but the original noise is large, the shape matching is poor, and the airflow guiding eff...

AI Technical Summary

Problems solved by technology

During the ventilation process of ordinary stroke cycle, the exhaust port has good craftsmanship, but the stroke loss is large; the tendency of the piston ring to bounce into the air port is small, and the stroke loss is small when the air port height is the same, but the original noise is large, the shape matching is poor, and the airflow guiding effect is small ; When exhausting in advance, the face value is small, the ventilation efficiency is poor, the loss of fresh gas is large during the ventilation process, there are many exhaust pollutants such as HC, and the fuel consumption is high

Images