Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1986-11-25
1988-10-25
Braun, Leslie A.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74752C, B60K 4106
Patent
active
047794925
ABSTRACT:
This hydraulic pressure transmission control device is for a vehicle with a transmission system which has, in series in the specified order in the rotational force transmission path, a first transmission mechanism which can be set to any one of several speed stages according to selective supply of hydraulic fluid pressures, and a second transmission mechanism which similarly can be set to any one of several speed stages according to selective supply of hydraulic fluid pressures. It includes a first hydraulic fluid pressure control device which has a first line pressure control valve for supplying it with a first line pressure for being then selectively supplied to the first transmission mechanism as its selective supply of hydraulic fluid pressures; and a second hydraulic fluid pressure control device which has a second line pressure control valve for supplying it with a second line pressure for being then selectively supplied to the second transmission mechanism as its selective supply of hydraulic fluid pressures. Thereby the first and second line pressures can be independently determined according to circumstances. Particularly, the second line pressure control valve may increase the line pressure which it supplies, the lower is the engaged speed stage of the first transmission mechanism, and/or the lower is the engaged speed stage of the second transmission mechanism, and/or the higher is the value of a parameter representing the load on the engine.
REFERENCES:
patent: 3895542 (1975-07-01), Miyauchi
patent: 4033203 (1977-07-01), Hirosawa et al.
patent: 4324156 (1982-04-01), Iwanaga et al.
patent: 4369571 (1983-01-01), Matsumoto et al.
patent: 4480505 (1984-11-01), Takano et al.
patent: 4481877 (1984-11-01), Takano et al.
patent: 4663992 (1987-05-01), Fujiura et al.
Fukumura Kagenori
Yasue Hideki
Braun Leslie A.
Diehl Dwight G.
Toyota Jidosha & Kabushiki Kaisha
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