Motorcycle CYLINDER Block Gas Compression

Motorcycle CYLINDER Block Gas compression

The engine block is a space for the combustion, expansion and expansion of flammable gases. During the combustion process, the maximum temperature of the gas can reach 2 (XK) ℃ ~ 3000 ~ ℃ its inner wall directly by the high temperature and high pressure gas, and the outer wall and by the wind (or water) cooling, so that the cylinder to withstand relatively large mechanical stress And thermal stress, so the requirements of the cylinder liner to have sufficient strength and stiffness, and work less deformation. In addition, the cylinder block on the movement of the piston plays a guiding role, the cylinder wall in addition to the piston side of the pressure, but also that the high-speed movement of the piston, the cylinder wall by a strong friction, the engine wear one of the most serious surface, Require the cylinder block must have a certain wear resistance.

First, product performance

The company produced cylinder block with boron cast iron cylinder liner, bimetallic casting, with high hardness, good oil storage, wear resistance, heat dissipation and other advantages, dimensional accuracy and shape and position tolerance have reached more than 7, and honing Reticulated distribution rules, can make the film evenly distributed, reciprocating pieces of good lubrication, small oil consumption.

Second, the cylinder block disassembly

Note: Some models can be dismantled on the car, and some need to remove the engine disassembly. For the four-stage engine, remove the cylinder head assembly, unload the timing chain guide (70, 100) or the timing chain guide (type 125), remove the connecting bolts of the cylinder and the housing, ie Pull the cylinder out.

For the two-way engine, you need to first remove the exhaust muffler (if the air intake on the cylinder when the intake device will be removed at the same time), and then remove the cylinder head, remove the cylinder block and crankcase connection bolts , In order to pull out the cylinder block.

Cylinder installation in reverse order, note:

1. o-ring, gasket, locating pin to be replaced with new pieces.

2. Gas tank I inner surface coated oil.

3. Piston ring opening position to be correct.

4. Do not fall into the crankcase.

Third, the cylinder block inspection

1. Check the cylinder diameter

Measure the inner diameter of the cylinder with the 6 points of the upper, middle and lower sections in the direction of the piston pin and its vertical direction. The maximum value is the cylinder diameter. If this value has exceeded the limit, it should be boring to increase or replace the new cylinder.

2. Check the cylinder end face deformation

Check the cylinder end face with the ruler and thickness gauge (note: clean the pad and viscose marks), if the deformation is greater than the use of the limit should be grinding or replacement.