Engine for motorcycle

A technology for three-wheeled motorcycles and engines, which is used in engine ignition, engine components, machines/engines, etc., can solve the problems of short push rod length, increased noise, large inner diameter of cylinder block and cylinder liner, etc., so as to improve the torque at low speed , Strengthen the mixing degree and improve the effect of aeration efficiency

CN101798967AInactive Publication Date: 2010-08-11重庆动源摩托车配件销售有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2010-08-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an engine for a motorcycle. For the engine, the diameter of a gas inlet of a cylinder head is 21 to 23millimeters, and the diameter of a gas outlet is 19 to 21 millimeters; the eccentricities of left and right cranks are 30.5 to 32.5 millimeters, and the centre distances of mounting holes on both ends of a connecting rod are 104.5 to 105.5 millimeters; the height of a cylinder body is 75.5 to 77.5 millimeters, the internal diameter of a cylinder sleeve is 54 to 56 millimeters, and the height of the cylinder sleeve is 101 to 103 millimeters; the diameter of an upper end opening of a gas inlet tube is 24 to 26 millimeters, and the diameter of a lower end opening of the gas inlet tube is 21 to 23 millimeters; and the length of a convex hull of a rotor of a magnetic motor is 13 to 18 millimeters, and the included angle between the center of the convex hull and a keyway of the rotor of the magnetic motor is 50 to 60 degrees. The engine has the advantages of effectively improving gas-intake efficiency of the engine, increasing an operating stroke of the engine, reducing rotating speeds of the cranks in all strokes and the rotating speed section of the maximum torque point of the engine, ensuring that the engine can output big torques at the middle / low rotating speed and improving reliability and durability of the engine.
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Description

technical field

[0001] The invention relates to an internal combustion engine, in particular to an engine used by a three-wheeled motorcycle. Background technique

[0002] At present, the working conditions of three-wheeled motorcycles with a displacement of 125ml and above in the domestic market are harsh. Three-wheeled motorcycles are mostly used under heavy loads and poor road conditions, and their engines are mostly used at medium / low speeds. The design concept of the high-speed engine is still used in the design of important parts such as the cylinder head, cylinder block, piston, crank-connecting rod mechanism, intake pipe, valve mechanism, ignition system and transmission system of the traditional three-wheeled motorcycle engine. :

[0003] 1. The intake and exhaust passages of the engine cylinder head use a large passage structure (the diameters of the intake and exhaust ports are 28-30mm and 23-25mm respectively) to increase the intake and exhaust volume at high en...

Examples

Embodiment Construction

[0048] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0049] Such as Figure 1 to Figure 10 As shown, the present invention consists of cylinder head 1, piston 2, connecting rod 3, cylinder block 4, crank pin 5, right crank 6, primary driving gear 7, clutch combination 8, main shaft combination 9, secondary shaft combination 10, starting shaft 11 , right crankcase cover 12, right crankcase body 13, left crankcase body 14, magneto rotor 15, left crankcase cover 16, left crank 17, gas distribution cam 18, lower rocker arm combination 19, push rod 20, piston Pin 21, rocker arm bracket combination 22, intake pipe 23, exhaust valve 24, valve outer spring 25, valve inner spring 26 and intake valve 27 and other parts constitute. Wherein the left crankcase body 14 is fastened and fixed with the right crankcase body 13 to form the engine crankcase, the left crankcase cover 16 is installed at the left end of the left cra...