Idling control system for an automatic transmission providing anti roll back action

Patent · Tue Mar 10 04:00:00 EST 1987

OSTI ID:6740492

Kubo, S; Taga, Y; Nakamura, S

An idling control system is described for an automatic transmission system for a vehicle equipped with an engine. The automatic transmission system comprises a gear transmission mechanism which comprises: a power output shaft, a forward clutch which is engaged when the gear transmission mechanism is engaged to a forward speed stage, and a one way clutch which in cooperation with the forward clutch provides a first speed stage by means of rotation prevention. The mechanism also comprises a brake which, when engaged, in cooperation with the one way clutch prevents the power output shaft of the gear transmission mechanism from rotating in the direction to allow reverse motion of the vehicle. The system comprises: a first means for engaging the forward clutch selectively either to a maximum amount or to an intermediate amount substantially lower than the maximum amount; a second means for engaging the brake, when the forward clutch is thus engaged to the intermediate amount by the first means; and a third means for, when the automatic transmission is being operated in a forward driving mode, the vehicle is substantially stationary, and the engine is in substantially idling condition, actuating the first means to engage the forward clutch to the intermediate amount and the second means to engage the brake.

• Assignee: Toyota Jidosha Kabushiki Kaisha, Toyota
• Patent Number(s): US 4648289
• OSTI ID: 6740492
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
BRAKES
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
GEARS
MACHINE PARTS
MECHANICAL TRANSMISSIONS
MOTION
ROTATION
SHAFTS
SPEED REGULATORS
VEHICLES
VELOCITY