The Evolution of the Electrically / Electronically Controlled Transmission

The emphasis of the last decade on vehicle safety and exhaust emissions has changed to an increased priority on lowering fuel consumption; thus, vehicle weight and drag coefficient have become decisive design parameters.

Electronic components are replacing their existing electro-mechanical counterparts, resulting in either cost advantages or better or more reliable function. In addition new functions are being introduced which were unattainable in the absence of electronics. In the future the functions made possible by electronics may become integral to the mechanical concepts of new designs.

This paper considers the transmission as the link between the engine and the vehicle. It details which directions development should follow and how large the potential in each direction is at present.