Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1983-02-08
1985-08-27
Herrmann, Allan D.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74869, 74752C, B60K 4102
Patent
active
045370958
ABSTRACT:
A low coast shift (LCS) valve and a low coast shift control (LCC) valve are disposed coaxially with a shift valve, and a spring is disposed between the LCS valve and LCC valve. In the range in which engine braking occurs, the LCC valve is at first displaced by the line pressure toward the LCS valve. Displacement of the LCC valve is transmitted by way of the spring to the LCS valve and the shift valve. This displacement of the LCC valve is limited by a stopper, so that displacement of the LCS valve and the shift valve following the displacement of LCC valve are dependent on the relationship of the spring with the governor pressure. When displacement of the shift valve has reached a given distance, a port opens. Since the line pressure from the port is much higher than the governor pressure, the shift valve is instantaneously downshifted as soon as the aforesaid port has opened. In the range in which the engine braking occurs, line pressure is supplied to a detent regulator valve, so that the detent regulator valve is forcibly retained at an inoperative position, thereby preventing generation of a detent pressure.
REFERENCES:
patent: 3236117 (1966-02-01), Christianson
patent: 3405575 (1968-10-01), Searles et al.
patent: 3640157 (1972-02-01), Schaefer
patent: 3927579 (1975-12-01), Golan
patent: 4139015 (1979-02-01), Sakai
patent: 4145937 (1979-03-01), Shindo et al.
patent: 4148232 (1979-04-01), Moriya
Herrmann Allan D.
Rolnicki Joseph M.
Toyota Jidosha Kogyo Kabushiki Kaisha
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