Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1990-05-18
1992-05-12
Braun, Leslie A.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74866, 475205, B60K 4110
Patent
active
051117193
ABSTRACT:
An automatic transmission comprises a main gearing and an auxiliary gearing drivingly connected to the main gearing. The auxiliary gearing is shiftable from a high gear position (direct drive) to a low gear position (reduction drive) by disengagement of a direct clutch and engagement of a reduction brake. In order to enhance a response to engine braking forward running demand and a response to reverse running demand, a bypass line is arranged in parallel to an one-way orifice disposed in a hydraulic fluid line having one end communicating with the reduction brake and an opposite end connected to a shift valve. The shift valve is fluidly disposed between a pressure regulator valve, the opposite end of the hydraulic fluid line, and the direct clutch. A reduction brake timing valve opens the bypass line when a III-range hydraulic pressure or a reverse-select hydraulic pressure is present. The one-way orifice divides the hydraulic fluid line into a first portion extending between the one-way orifice and the reduction brake and a second portion extending between the one-way orifice and the opposite end. An accumulator communicates with the first portion of the hydraulic fluid line. The II-range hydraulic pressure or reverse-select hydraulic pressure is supplied as an accumulator back-up pressure to the accumulator.
REFERENCES:
patent: 4161895 (1979-07-01), Ushijima et al.
patent: 4532829 (1985-09-01), Sugano
patent: 4570511 (1986-02-01), Nishimura et al.
patent: 4680989 (1987-07-01), Sykora et al.
patent: 4706523 (1987-11-01), Nishikawa et al.
patent: 4713989 (1987-12-01), Hayakawa et al.
patent: 4722250 (1988-02-01), Sumiya et al.
patent: 4722251 (1988-02-01), Sumiya et al.
patent: 4727774 (1988-03-01), Sumiya et al.
patent: 4730521 (1988-03-01), Hayasaki et al.
patent: 4753134 (1988-06-01), Hayasaki
patent: 4776240 (1988-10-01), Miki
patent: 4833943 (1989-05-01), Bucksch
patent: 4916977 (1990-04-01), Aoki et al.
"Nissan Full-Range Electronically Controlled Automatic Transmission of the RE4R01A Type (A261C07)" published by Nissan Motor Co., Ltd., 1987.
Braun Leslie A.
Nissan Motor Co,. Ltd.
Stavish Matthew
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