Control system for automatic gearbox - has return to neutral governed by output shaft r.p.m. plus e.g. door opening or brake signals

摘要

The control system for automatic gearbox utilises monitored radial output shaft velocities to instigate an automatic return to neutral, the return being effected when the vehicle is stationary and the radial velocity drops below a definite min. value. A prolonged stationary period is a further condition of the return to neutral, being defined by the existance of certain phenomena which are also monitored under the system. Detectors transmit signals to an AND logic processor of which certain requirements must be satisfied. Two phenomena may be used to represent a prolonged stationary period i.e. the opening of a door or the application of the brake, the accelerator and/or the brake pedal being locked until the phenomena disappear.