Cam of camshaft for motorcycle engine

A technology for engines and motorcycles, applied in valve drive devices, valve details, etc., can solve problems such as the inability to reduce engine temperature, and achieve the effects of reducing the heat load of the body, improving cooling, and improving the scavenging effect.

Inactive Publication Date: 2008-10-22
LONCIN MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the engine temperature cannot be effectively reduced

Method used

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  • Cam of camshaft for motorcycle engine
  • Cam of camshaft for motorcycle engine
  • Cam of camshaft for motorcycle engine

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Embodiment Construction

[0020] Such as Figure 1~3 As shown, the camshaft of the present invention includes an intake cam 1 and an exhaust cam 2 arranged at intervals, and the radius of the base circle of the intake and exhaust cams of the camshaft is 10.50 mm. The maximum lift point of intake cam 1 is point N (peach tip), the maximum lift is 5.566mm, along the clockwise direction, from point a to point N is the rising section, and the included angle is 110°; from point N to point b is the falling section section, with an included angle of 87°. The maximum lift point of the exhaust cam 2 is point X (peach tip), the maximum lift is 5.377mm, along the clockwise direction, from point c to point X is the rising section, and the included angle is 90°; from point X to point d is the falling section section, with an included angle of 113°. The included angle of the intake and exhaust cam lobe is 48.8°+56.1°=104.9°. Compared with ordinary cams, the most obvious differences are: the lift value of intake ca...

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Abstract

The present invention relates to one kind of cam shaft for motorcycle engine, and the cam shaft includes separately set single cylinder inlet cam and single cylinder exhaust cam. The inlet cam has an ascending section angle of 110+ / -1 deg, the exhaust cam has a descending section angle of 113+ / -1 deg, and the base radius is 10.50 mm. The motorcycle engine with the cam shaft has increased inlet valve opening lead angle and exhaust valve delayed close angle, relatively great overlap angle between the inlet valve and the exhaust valve, improved cooling on cylinder end, piston and other parts, lowered engine heat load and raised engine power.

Description

technical field [0001] The invention relates to the field of motorcycle engines, in particular to a cam structure of a motorcycle engine camshaft which can reduce engine heat load and temperature and can increase engine power. Background technique [0002] The working cycle of the motorcycle engine is carried out at high temperature, and the maximum temperature of the combustible mixture can reach more than 2000°C. Frictional heat generated by friction between high-temperature gas and moving parts will increase the temperature of pistons, cylinder blocks, cylinder heads and other components. High temperature is easy to cause thermal deformation, reduce the mechanical strength of engine components, and change the normal fit clearance due to excessive thermal expansion. Therefore, the motorcycle engine must have a reliable cooling system to ensure the normal operation of the engine. The normal working temperature of the motorcycle engine under load should not be too low or t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/08
Inventor 孔令华
Owner LONCIN MOTOR
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