Ningbo CQ Machining Co., Ltd.
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Payment Terms: | T/T,L/C |
Place of Origin: | Zhejiang, China (Mainland) |
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Motorcycle by the engine, transmission, travel system, steering, braking system consisting of five parts and electrical instrumentation. The overall structure of the motorcycle and its parts name.
Engine
1, motorcycle engine features
(1) The engine is a two-stroke or four-stroke gasoline engine.
(2) the use of air cooling, there are two types of naturally cooled with forced air cooling. General models used to rely on moving air blowing cylinder head, cylinder fins to remove heat put on the natural air cooling mode. In order to guarantee high-speed motorcycle engine does not start running low and the engine cool before using the installed fans and wind shield, using the forced introduction of cold air blowing forced air cooling method heatsink.
(3) the engine speed is high, usually in the 5000 r / min or more. L Power (per liter of engine displacement issued effective power) large, generally at 60 kW / l. This shows a high degree of enhancement motorcycle engine, small engine dimensions.
(4) the engine crankcase and clutch, gearbox design compact structure.
all kinds of connectors for motorcycle
2, the body
The body of the cylinder head, cylinder block and crankcase composed of three parts, cylinder head casting aluminum alloy heat sink, the new four-stroke motorcycle engines are used OHV, chain drive, overhead camshaft configuration mode. Bimetallic cylinder block material (cast iron cylinder liner outer cast aluminum heat sink) as much as to get a better cooling effect. Some motorcycle using cast iron cylinder block, such as the Yangtze River 750, Jialing JH70 type, in some small mopeds, jade river YH50Q small displacement (50 cc) engine with aluminum cylinder wall plated 0.15 mm hard chrome layer structure. Crankcase made of aluminum die-cast enclosure from a combination of left and right. Some motorcycle levy plus a buffer between the heat block to suppress the vibration noise emitted heat sink.
3, crank link
Motorcycle engine crankshaft with modular, the left crank, right crank and crank pin press fit together. The left and right neck and a ball bearing spindle axle for supporting the crankshaft in the crankcase. Both ends of the crankshaft are equipped with flywheel magneto and clutch drive gear. Link structure as a whole, the bulk of an annular shape, built with a combination of needle bearings and crank pin into the crank linkage. In the two-stroke engine piston rings when installing pay attention to the opening of the piston ring piston ring groove in the alignment dowels to prevent rotation of the piston ring groove in the ring, resulting in leakage, scratched into the liner on the row port.
Cam shaft parts
4, carburetor
Motorcycle carburetor fuel supply system is an important part, is located between the air intake into the engine air cleaner. General motorcycle engine intake air flow direction are used for the flat-priming, as the plunger throttle, carburetor float chamber. The main structure consists of two parts carburetor float chamber and the mixing chamber. Located below the carburetor float chamber, there is tubing through the throttle switch to tank through a needle valve on the float, the float chamber to maintain a certain height of the oil, so oil pressure is stable. The effect of the mixing chamber is mixed with air atomizing fuel evaporation of the engine under various load and speed can be obtained the desired mixture. It consists Arts Festival valves, injection needles, injection pipe gas, oil, road and other components.
Motorcycle driven by turning the throttle handle throttle cable manipulating the needle moves up and down with the injector wire throttle system, changing the intake section of the fuel supply pipes to accommodate different speeds, you need to lower the load on the mixture. Mounted on the side of the carburetor idle adjustment screw to adjust the idle speed. Idle stop screw to prevent rotation of the minimum opening degree of the throttle valve and the throttle adjustment. The top of the throttle valve return spring, when the handle does not rotate the throttle valve is closed envoy.
On some two-stroke motorcycle engines, in order to avoid anti-spray carburetor phenomenon occurs at low speeds, between the carburetor and the cylinder block is equipped with a one-way reed valve intake. Made of thin steel leaf springs, the seat of the aluminum alloy member, the intake port is opened, the inlet plane of the contact spring member is attached with a layer of oil rubber springs to reduce shock and vibration of the valve seat . When inhale, a certain crankcase vacuum, in the role of the reed valve opening pressure of the mixture into the crankcase when the piston down, ventilation port is not open instantly, crankcase pressure increases, the reed valve closes to prevent backflow of gas mixture to improve the power and economy of movement of the engine at low speeds.
5, the lubrication system
Smooth four-stroke engine with splash lubrication and pressure smooth way of combining. Two-stroke engines typically use more mixed lubrication mixed with a certain proportion of gasoline in the gasoline engine oil level QB. But such a smooth way of mixing oil regardless of engine operating conditions, the ratio has been set according to supply lubricating oil, increased oil consumption, incomplete combustion, coke more exhaust pollution. A new generation of two-stroke engines are separated smooth way, the installation of the separate oil tank and oil pump lubricants. Generally use a reciprocating piston pump, variable volume pump oil from the crankshaft through the worm gear, worm drive. Fuel supply through the throttle grip, the throttle valve control cable to the carburetor linkage, so that the oil supply amount changes with the engine speed changes, supply more high speed, low speed less oil, reasonable fuel, lubricants mixed with ways to save more compared to oil. Oil mixed gas blown by high speed into tiny mist, smooth supply of parts needed to reduce oil into the combustion chamber, the combustion gas mixture completely, reducing coke and exhaust pollution.
6, starting
Motorcycle starting to kick the main way. Starting institutions to happiness XF250 motorcycle gear segment represented the starting mechanism. Driven sector gear shift lever kick starter ratchet clutch assembly sprocket, front chain, crank sprocket drive crankshaft rotation, start the engine. When the engine is started by starting the one-way ratchet function and effect of the return spring to restore the original position of the starter mechanism. This starting mechanism, when starting the starter lever appropriated neutral position, depressing the pedal to start.
Another pedal lever of the trigger mechanism to start introducing some models used. Unlike its predecessor, the clutch when starting first clenched hand, disengage the clutch, shift lever position can be placed in any grade, do not have to be placed in neutral, release the clutch after starting, the throttle can be started. Depress the pedal lever when starting, the starter pedal lever ratchet pawl shaft and the starter drive gear meshing pedal rod to make the drive gear, idler gear was driven gear, clutch gear, crankshaft rotation starter pinion drive start the engine. After starting, the start left foot pedal lever, the return spring so that the pedal lever is rotated reversely in the engaging pawl from the ratchet teeth and to restore the original position.
In the larger displacement motorcycles such as the Yangtze 750D brand motorcycles, Yamaha (YAMAHA) two-cylinder motorcycles, Suzuki (SUZUKI) GT750-cylinder motorcycles, Honda (HON-DA) CL1000 four-cylinder motorcycle, adopted starting motor starting.
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We are specialized in machine all kinds of hardware fitting for machinery.
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