CN2634127Y

CN2634127Y - Motorcycle engine with trumpet type burning room

Info

Publication number: CN2634127Y
Application number: CN 02222345
Authority: CN
Inventors: 王自强; 彭斌; 刘世斌
Original assignee: Chongqing Zongshen Technology R & D Co ltd
Current assignee: Chongqing Zongshen Engine Manufacturing Co Ltd
Priority date: 2002-04-22
Filing date: 2002-04-22
Publication date: 2004-08-18
Anticipated expiration: 2012-04-22

Abstract

The utility model relates to a motorcycle engine with trumpet type burning room belonging to motorcycle manufacturing technical field, which mainly comprises a cylinder head with a valve mechanism, a cylinder body, a piston-connecting rod crankshaft assembly, a magnetogenerator, a belt, a drive change-speed gear, a driven change-speed gear, a speed reducer, a feet starting mechanism, a drive change-speed gear with a clutch and a carburettor assembly etc., wherein, the surface of the burning room arranged on the cylinder head is formed by two through connected spherical surfaces of different radii with the circle centers positioned at the same straight line through transition via an arc surface at the through connection part. The burning room of the utility model combines the advantages of wedge type burning room and hemisphere type burning room, thereby greatly improving the performance of motorcycle engine with burning room of the above shape and structure.

Description

Motorcycle engine with broadening formation firing chamber

Technical field

The utility model relates to a kind of motorcycle engine, belongs to motorcycle manufacturing technology field.

Background technique

Motorcycle engine is as the power plant of motorcycle, the performance of motorcycle played a part very important, and the shape of motor inside cylinder head upper combustion chamber structure directly influences engine power performance.Firing chamber on its cylinder head of existing motorcycle engine mainly contains wedge type firing chamber, hemisphere type firing chamber and three kinds of forms of basin shaped combustion chamber.

Wedge type chamber structure compactness can form the squish eddy current when compression stroke terminates, can arrange larger-diameter intake valve, and inflation performance is good, is specially adapted to high speed engine, but its combustion-chamber shape machining difficulty, is not easy to guarantee the volume of firing chamber.

Hemisphere type chamber structure compactness, spark plug can be arranged in firing chamber central authorities, flame travel is short and have antiknock quality preferably, the thermal efficiency is higher, is easy to machining and guarantees combustion chamber volume, also can arrange larger-diameter intake valve, inflation property and good dynamic property, but this firing chamber does not have quench area, in the cylinder air motion a little less than, Economy is relatively poor during sub load.In addition, the velocity of combustion of the type firing chamber combustion gas is too fast, and it is more rough to work, and burning Zhou noise is bigger.

The basin shaped combustion chamber compact structure, heat diffusion area is little, and mechanical processing technique is good, keeps in repair more conveniently, and but its spark plug can not be arranged in the firing chamber middle position, and the intake valve diameter is less, and inflation performance is not so good, and power character is relatively poor.

The model utility content

The purpose of this utility model provides a kind of motorcycle engine of improving the combustion-chamber shape structure, makes the firing chamber of this motor have the advantage of wedge type firing chamber and hemisphere type firing chamber concurrently, thereby improves the performance of motorcycle engine.

Motorcycle engine with broadening formation firing chamber described in the utility model mainly is made up of the active change pulley of cylinder head, cylinder block, piston rod crankshaft assembly, magnetogenerator, belt, driving change pulley, driven change pulley, retarder, pin starting mechanism and the band clutch of band distribution device and carburetor assembly etc., on cylinder head, offer the firing chamber, this combustor surface is that the sphere of two different radiis being located along the same line by the center of circle passes through mutually and connects, and passes through at it and to connect the position and form with an arc surface transition.

Motorcycle engine with broadening formation firing chamber described in the utility model, because its firing chamber has this kind shape structure and has following advantage: 1, mechanical processing characteristic is better, can control the volume of firing chamber more accurately; 2, opening area is big, can arrange larger-diameter valve, and it is good to fill its performance; 3, its surface to volume ratio is little, and heat diffusion area is little relatively, helps reducing thermal loss, thermal efficiency height; 4, combustor surface becomes streamlined, has reduced the flow resistance of gas in the firing chamber, and the gas flow loss is little, and charging efficiency improves; 5, chamber structure is more compact, and spark plug can be arranged in firing chamber central authorities as far as possible, and flame travel is short, has antiknock quality preferably.Thereby the performance of the motorcycle engine with this kind shape structure firing chamber is improved largely.

Description of drawings

Now in conjunction with the accompanying drawings the utility model is described in further detail.

Fig. 1 is that the master with motorcycle engine cylinder head of broadening formation firing chamber described in the utility model looks schematic representation;

Fig. 2 is its elevational schematic view.

Embodiment

As Fig. 1, shown in Figure 2, this motorcycle engine is mainly by the cylinder head of being with distribution device, cylinder block, the piston rod crankshaft assembly, magnetogenerator, belt, drive change pulley, driven change pulley, retarder, compositions such as the active change pulley of pin starting mechanism and band clutch and carburetor assembly, wherein, cylinder head is positioned at cylinder block top, cylinder head, cylinder block and piston rod crankshaft assembly constitute the power section of motor, the power that produces is exported by bent axle, drive the active change pulley of band clutch, and drive driven change pulley by belt, behind retarder, export by output shaft.On cylinder head, offer firing chamber 1, it is positioned at the middle part, lower end surface of cylinder head, valve-seat bore 2 is arranged in the cylinder head and with the firing chamber and connects, this 1 surface, firing chamber is that the sphere of two different radiis being located along the same line by the center of circle passes through mutually and connects, and passes through at it and to connect the position and form with an arc surface transition.

Claims

1, a kind of motorcycle engine with broadening formation firing chamber, the active change pulley of main cylinder head by the band distribution device, cylinder block, piston rod crankshaft assembly, magnetogenerator, belt, driving change pulley, driven change pulley, retarder, pin starting mechanism and band clutch and carburetor assembly etc. are formed, on cylinder head, offer the firing chamber, it is characterized in that, this combustor surface is that the sphere of two different radiis being located along the same line by the center of circle passes through mutually and connects, and passes through at it and to connect the position and form with an arc surface transition.