Hydraulic control system for automatic transmission, incorporati

Details Hydraulic control system for automatic transmission, incorporati Hydraulic control system for automatic transmission, incorporati

1987-10-16

1989-11-14

Braun, Leslie A.

Machine element or mechanism

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

Preselected indexed position

74868, 74869, B60K 4116

Patent

active

048799254

ABSTRACT:
A hydraulic hill hold control system for an automatic transmission for a vehicle adapted for the purpose of hill hold, wherein the supply of hydraulic pressure to the brake is interlocked with the shifting of the hydraulic speed stage switching system so that the brake is engaged only when the gear transmission mechanism is at a certain speed stage at which the brake is in any event engaged and therefore the engagement of the brake for hill hold does not interfere with the forward driving operation of the gear transmission mechanism.

REFERENCES:
patent: 3771630 (1973-11-01), Koivunen
patent: 3890856 (1975-06-01), Miyauchi et al.
patent: 3893698 (1975-07-01), Fontaine
patent: 4478108 (1984-10-01), Nishimura et al.
patent: 4513639 (1983-04-01), Hiramatsu
patent: 4526065 (1985-07-01), Rosen et al.
patent: 4643049 (1987-02-01), Nishikawa et al.
patent: 4644826 (1987-02-01), Kubo et al.
patent: 4648289 (1987-03-01), Kubo et al.
patent: 4686872 (1987-08-01), Aoki et al.
patent: 4784020 (1988-11-01), Hamano et al.

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