Idling control system for an automatic transmission providing an

Details Idling control system for an automatic transmission providing an Idling control system for an automatic transmission providing an

1985-08-26

1987-03-10

Dorner, Kenneth J.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74867, 192 0044, 192 0055, 192 009, B60K 4118, B60K 4116

Patent

active

046482890

ABSTRACT:
An automatic transmission has a gear transmission mechanism with a forward clutch which is engaged when the gear transmission mechanism is engaged to a forward speed stage, a one way clutch which is in cooperation with the forward clutch provides a first speed stage by rotation prevention, and 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. An idling control system for the transmission includes a first mechanism for engaging the forward clutch selectively either to a maximum amount or to an intermediate amount substantially lower than the maximum amount; a second mechanism for engaging the brake, when the forward clutch is thus engaged to the intermediate amount by the first mechanism; and a third mechanism 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 mechanism thus to engage the forward clutch to the intermediate amount and the second mechanism thus to engage the brake. Thereby, rolling of the vehicle backwards down a hill while waiting in the stopped condition with the engine idling is positively prevented, and starting off of the vehicle is also facilitated.

REFERENCES:
patent: 4478108 (1984-10-01), Nishimura et al.
patent: 4495576 (1985-01-01), Ito
patent: 4513639 (1985-04-01), Hiramatsu
patent: 4526065 (1985-07-01), Rosen et al.
patent: 4561328 (1985-12-01), Hiramatsu

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