Speed selection means for vehicle transmission system providing either manual or fully automatic operation
A transmission is described for an automotive vehicle comprising an engine which consists of: a gear transmission mechanism which selectively provides a plurality of forward speed stages of successively different reduction gear ratios according to a control signal supplied thereto; a clutching mechanism including a clutch pedal and a power actuator for selectively power transmittingly connecting or disconnecting the gear transmission mechanism to or from the engine for the convenience of changing over of the speed stages in the gear transmission mechanism, according to operation of the pedal by a vehicle driver or a control signal supplied thereto; an operational mode selection means for operation by the vehicle driver to set operational mode of the transmission either to automatic or manual operational mode; a speed/range selection means for operation by the vehicle driver to select ranges of speed stages which are available to automatic speed change control by the gear transmission mechanism when the operational mode selection means is set to the automatic operational mode and to select any one of the plurality of forward speed stages for the gear transmission mechanism when the operational mode selection means is set to the manual operational mode.
- Assignee:
- Toyota Jidosha Kabushiki Kaisha, Toyota
- Patent Number(s):
- US 4589532
- OSTI ID:
- 5575060
- Resource Relation:
- Patent File Date: Filed date 08 Mar 1983
- Country of Publication:
- United States
- Language:
- English
Similar Records
Method for controlling a motor vehicle powertrain
Method for controlling a motor vehicle powertrain