Hydraulic control system for automatic transmission with shiftin

Details Hydraulic control system for automatic transmission with shiftin Hydraulic control system for automatic transmission with shiftin

1988-02-10

1989-11-28

Diehl, Dwight G.

Machine element or mechanism

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

Preselected indexed position

74866, B60K 4106

Patent

active

048829528

ABSTRACT:
A hydraulic control system for an automatic transmission has a shifting shock reducing device capable of regulating the transitional oil pressure applied to the frictionally engaging devices of the automatic transmission, and provided between a shift valve and the frictionally engaging devices. The shifting shock reducing device is controlled on the basis of a signal representative of the torque of the engine, and a signal representative of the transitional shift state to regulate the transitional oil pressure. Thus, the hydraulic control system is highly reliable, is capable of compensating for variations of the functions thereof over time, and is capable of maintaining a high control accuracy.

REFERENCES:
patent: 3956947 (1976-05-01), Leising et al.
patent: 4570511 (1986-02-01), Nishimura et al.
patent: 4633739 (1987-01-01), Ogasawara et al.
patent: 4674364 (1987-06-01), Shindo et al.
patent: 4713989 (1987-12-01), Hayakawa et al.
patent: 4722247 (1988-02-01), Shindo et al.
patent: 4727774 (1988-03-01), Sumiya et al.
patent: 4730521 (1988-03-01), Hayasaki et al.
patent: 4745826 (1988-05-01), Nishikawa et al.
patent: 4751858 (1988-06-01), Iwatsuki

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