Automatic shift line switchover system for automatic transmission

Claim 1

An automatic shift line switchover system for use in an automatic transmission for a vehicle comprising a signal generator unit for generating signal voltages which are fixed functions of the vehicle speed and throttle position for determining a plurality of automatic shift lines, a first and a second comparing amplifier for carrying out the comparison between the vehicle speed responsive signal and the throttle position responsive signal applied from said signal generator unit so as to discriminate as to whether the vehicle speed and the throttle position lie in a region in which an output signal is generated from said comparing amplifiers or in a region in which no output signal is generated from said comparing amplifiers, a switching section including two transistors which have their collectors connected respectively to the output terminals of said comparing amplifiers and their emitters connected to a common output terminal to constitute an emitter follower circuit, a switch and a transistor circuit in said switching section for selectively applying a switching signal to the input terminals of said emitter follower circuit for selecting one of the output signals delivered from said first and second comparing amplifiers so as to derive the selected output signal from said output terminal of said switching section, aNd an actuator means connected to said output terminal of said switching section.