Motor tricycle engine decompression starting mechanism

Abstract

The invention discloses a motor tricycle engine decompression starting mechanism. An axial arch-shaped groove is formed in the surface of a base circle of a cam and extends to an extension section of the base circle of the cam. An arc-shaped groove corresponding to the arc-shaped groove in the extension section of the base circle of the cam is formed in an inner hole wall of a timing driven gear, a round hole is formed by enclosure of the two arc-shaped grooves, and a decompression eccentric pin is arranged in the round hole. One end of the decompression eccentric pin penetrates out of the round hole and is placed in the arc-shaped groove in the surface of the base circle of the cam, the other end of the decompression eccentric pin penetrates out of the timing driven gear and then is connected with an eccentric block, and a reset spring is arranged between the eccentric block and the timing driven gear. One section of the decompression eccentric pin, placed in the arc-shaped groove in the surface of the base circle of the cam, is provided with an eccentric portion, when the eccentric block is in a reset state, the eccentric portion protrudes out of the surface of the base circle of the cam and ejects a lower rocker arm which controls an exhaust valve to open. The motor tricycle engine decompression starting mechanism can greatly reduce engine starting difficulty, and is beneficial for popularization and market acceptability of large-discharge motor tricycles.

Description

technical field [0001] The invention relates to the improvement of motorcycle engine starting technology, in particular to a three-wheeled motorcycle engine decompression starting mechanism, which belongs to the technical field of engines. Background technique [0002] In the past two years, with the implementation of the Central Rich Farmers Policy and the Western Development Strategy, three-wheeled motorcycles have become a good helper for farmers to get rich. At present, the tricycle market has higher and higher requirements on the power of the engine, and the engine is also developing in the direction of large displacement. With the increase of engine displacement, the requirements for the engine are getting higher and higher, and the engine failure rate is also increasing. Among all the failures, the starting problem has become the main problem, whether it is electric start or kick start, it is more difficult. The main reason for the difficulty in starting is that with...

AI Technical Summary

Problems solved by technology

With the increase of engine displacement, the requirements for the engine are getting higher and higher, and the engine failure rate is also increasing. Among all the failures, the starting problem has become the main problem, whether it is electric start or kick start, it is more difficult

The main reason for the difficulty in starting is that with the increase of the engine displacement, the cylinder diameter and piston area increase, the force on the piston increases, the cylinder pressure is large when starting, and the recoil force of the engine starting is relatively large, so it is difficult to start

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