Automatic transmission system for use with automobiles
AssigneeToyoto Jidosha Kogyo Kabushiki Kaisha
InventorsHiroshi Arai, Yutaka Taga
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Abstract
An automatic transmission system for use with automobiles comprising a gear wheel transmission mechanism, a hydraulic control circuit and an electric computing circuit, said gear wheel transmission mechanism being changed over by said hydraulic circuit under the control of said computing circuit, wherein said computing circuit selects the changing-over conditions of the transmission system in response to the driver's will, as well as the automobile running conditions and automatically establishes a parking condition when the automobile is to be parked, and ensures protection when a malfunction has occured in said hydraulic circuit or said computing circuit.
Claims5
An automatic transmission system for use with automobiles comprising a gear wheel transmission mechanism, a plurality of hydraulically operable engaging means to accomplish transmission meshings in said gear wheel transmission mechanism, a parking mechanism, a hydraulically operable parking actuating means to actuate said parking mechanism, hydraulic pressure shift valve means operated by a plurality of solenoids to control the supply of hydraulic pressure to said engaging means and said parking actuating means, electric switches to be manually operated, means to generate signals regarding the vehicle running condition, and a computing circuit to control energization of said solenoids of said hydraulic pressure shift valve means in response to electric signals despatched from said electric switches and said signal generating means.
Dependencies are inferred from the claim text.