Mechanical Engineers

Automatic transmission There are two types of automatic transmission (gear box), namely, semi-automatic transmission and transmission and fully automatic transmission. These are distinguished according to their effect on vehicle handling dynamics. Semi-automatic transmissions are the gear boxes on which all operations normally performed by the driver when changing gear are carried out by electronically controlled actuator systems. This implies that a gear change always involves disengagement of the clutch and hence of the drive to the driving wheels. Semi-automatic transmissions are found on long distance haulage trucks, passenger coaches and more recently on small cars and sports cars. Fully automatic transmissions (normally called automatic transmission) change gear under load. This means, the power continues to flow to the driving wheels even during a gear shift operation. In this system, the drive engagement and gear ratio selection operations are performed with no ad...