Speed responsive electronic controls for transmissions

摘要

An automatic electronic remote control system is provided which is particularly adapted to control the operation of clutches for a hydraulic torque converter in a vehicle. Responsive to operating conditions, the system produces different control signals depending on whether the ratio of the frequencies of two series of pulses is above or below a predetermined value, the pulse frequencies being related to the rotational speeds of the input and output axes of the converter. The system includes two n-bit binary ring counters which respectively receive the two series of pulses, one of the countersbeing effective to control the other so that a signal representing the actual value of the ratio in question is produced in binary form. This signal is decoded to produce the control signal referred to above.