Three-wheel motorcycle engine decompression starting mechanism

Abstract

The invention discloses a motor tricycle engine decompression starting mechanism. An arc-shaped groove stretching to an extending segment of a cam basic circle is formed in the surface of the cam basic circle, an arc-shaped groove corresponding to the arc-shaped groove in the extending segment of the cam basic circle is formed in the inner hole wall of a time-correcting driven gear, the two arc-shaped grooves define a round hole in an enclosing mode, and a pressure reducing pin is arranged in the round hole. One end of the pressure reducing pin is located in the arc-shaped groove of the cam basic circle, the other end of the pressure reducing pin is located in a counter bore of the time-correcting driven gear. One end of a poking pin is tightly matched with the pressure reducing pin, and the other end of the poking pin is located in a fan-shaped poking groove of a centrifugal block. The segment, located in the arc-shaped groove in the surface of the cam basic circle, of the pressure reducing pin is provided with a flat part, and when the centrifugal block is in the state of returning, the flat part protrudes out of the surface of the cam basic circle and jacks up a lower rocker arm controlling an exhaust valve to open. According to the motor tricycle engine decompression starting mechanism, starting difficulty of an engine can be obviously reduced, and large-emission-amount motor tricycles are more favorable for being promoted and accepted in the market.

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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