CN2781017Y

CN2781017Y - Cylinder head of motorcycle engine

Info

Publication number: CN2781017Y
Application number: CN 200520101967
Authority: CN
Inventors: 林华中; 郭东劭; 孙勇; 蒋祖能
Original assignee: Zhejiang Qianjiang Motorcycle Co Ltd
Current assignee: Zhejiang Qianjiang Motorcycle Co Ltd
Priority date: 2005-04-30
Filing date: 2005-04-30
Publication date: 2006-05-17
Anticipated expiration: 2015-04-30

Abstract

The utility model relates to the improvement of a cylinder end of a motorcycle engine. An inlet valve conduit, an inlet valve seat, an exhaust valve conduit, an exhaust valve seat, a gas inlet and an exhaust outlet are arranged on a body of the cylinder end. The utility model is characterized in that a plane on which an inlet valve is positioned and a plane on which an exhaust valve is positioned are staggered into a section of distances H, and an inner curved surface of a combustion chamber is formed into a combined curved surface by S1, S2, S3 and S4 four curved surfaces. Because the inside of the combustion chamber of the utility model is designed into a bifacial structure, the fluidity of a gas flow is enlarged in the process of the intake charge and the exhaust of the gas flow, and gas flow is more sufficiently combusted; therefore, the power of the utility model is enlarged, the discharge of exhaust gas is decreased, and effects are more obvious particularly under the condition of low-speed operation.

Description

A kind of cylinder head of motorcycle engine

Technical field

The utility model relates to motor, particularly to the improvement of engine cylinder head.

Background technique

The cylinder head of existing motorcycle engine, on the cylinder head body, be shaped on suction port, suction valve cone and relief opening, exhaust valve seat, basically be on the same section, the negative camber of its firing chamber adopts same sphere, and advantage easy to process is no doubt arranged, but can only form single air-flow, flow velocity is slower, and turbulent extent is low, and it is insufficient to cause burning, engine power can not normally be brought into play, and discharge amount of exhaust gas is higher.

Summary of the invention

The purpose of this utility model provides the cylinder head of the motorcycle engine that a kind of burning is more abundant, power improves, discharging is little.

The technical solution of the utility model is: a kind of cylinder head of motorcycle engine, on body, be shaped on intake valve conduit, suction valve cone, exhaust valve guide, exhaust valve seat, suction port, relief opening, the plane that it is characterized in that the plane at intake valve place and the exhaust valve place segment distance H that staggers.

The above-mentioned distance H that staggers is 0.2-0.4 with the ratio of cylinder diameter.

The composite surface that the negative camber of above-mentioned firing chamber is made of S1, S2, four curved surfaces of S3, S4.

The utility model is owing to be designed to the antarafacial structure in the firing chamber, and constitute composite surface by four little curved surfaces, in the process of air-flow from the air inlet to the exhaust, the turbulivity of air-flow strengthens, it is more abundant to burn, power strengthens, discharge amount of exhaust gas reduces thereby make, and especially under the low-speed running situation, effect is more obvious.

Description of drawings

Fig. 1 is the worm's eye view of the utility model embodiment motorcycle engine cylinder head;

Fig. 2 is Figure 1A-A sectional view;

Fig. 3 is the view of Fig. 1 around 180 ° of horizontal rotational shaft.

Embodiment

With reference to Fig. 1-Fig. 3, cylinder head body 6 is shaped on suction port 1, relief opening 4, suction valve cone 2a, exhaust valve seat 2b, intake valve conduit 5a and suction valve cone 2a over against, exhaust valve guide 5b and exhaust valve seat 2b over against, from Fig. 1 and Fig. 3 as can be seen, the position of suction valve cone 2a and intake valve conduit 5a will exceed exhaust valve seat 2b and exhaust valve guide 5b H distance, and this distance H is chosen at about 0.3 for good with the ratio of cylinder bore.The internal surface of firing chamber 3 constitutes composite surface by S1, S2, four curved surfaces of S3, S4, and wherein S1 and S2 form an air-flow, and S3 and S4 form another air-flow, can form strong turbulent flow, accelerates flow velocity.

Claims

1, a kind of cylinder head of motorcycle engine is shaped on intake valve conduit, suction valve cone, exhaust valve guide, exhaust valve seat, suction port, relief opening on body, the plane that it is characterized in that the plane at intake valve place and the exhaust valve place segment distance H that staggers.

2, cylinder head according to claim 1 is characterized in that the distance H that staggers and the ratio of cylinder diameter are 0.2-0.4.

3, cylinder head according to claim 1 is characterized in that the composite surface that the negative camber of firing chamber is made of S1, S2, four curved surfaces of S3, S4.