摩托车专业修配知识（Motorcycle professional repair knowledge）.docVIP

摩托车专业修配知识（Motorcycle professional repair knowledge） Engine part 1. the diameter of the cylinder diameter of the cylinder bore is referred to as, cylinder diameter, unit mm. The distance between 2. piston stroke pistons running between the upper and lower dead centers. The unit is expressed by mm. 3. the position of the piston at the top stop point from the center line of the crankshaft. 4., the lowest point, the piston from the centerline of the crankshaft, the minimum distance. 5. cylinder working volume, cylinder work volume, commonly known as displacement, is the piston in the upper and lower dead point between the swept volume, the unit expressed in ml or cm3. 6. the ratio of the maximum volume to the minimum volume (including the volume of the combustion chamber) of the compression ratio, also known as the geometric compression ratio. 7. effectively compress the ratio of the cylinder volume to the minimum volume of the cylinder (including the volume of the combustion chamber) at the moment when the engine is sweeping (inlet) and the exhaust port begins to close. Apparently, the combustible mixture entering the cylinder begins to be compressed from this instant. 8. crankcase compression ratio of crankcase maximum volume to minimum volume (including sweep airway volume) ratio. 9. the working cycle consists of sweeping (into) gas, compression, combustion, expansion, exhaust and other processes of the cycle. Each work cycle completes the conversion of the fuel heat energy to the mechanical energy. At the same time, the reciprocating linear motion of the piston is changed into the rotation motion of the crankshaft through the crank connecting rod mechanism, and the output torque is achieved. 10. reciprocating piston gasoline engine using gasoline as fuel, after gasification, into a combustible mixture mixture of gasoline and air into the cylinder after compression, ignition and combustion heat release and pushes the piston linear motion, when the piston reaches BDC,