Control arrangement for variable power transmission

Details Control arrangement for variable power transmission Control arrangement for variable power transmission

1976-10-04

1979-12-04

Chandler, Lance

Machine element or mechanism

Gearing

With fluid drive

74753, 74730, F16H 4700, F16H 5710

Patent

active

041765648

ABSTRACT:
In a multi-speed planetary gear including a planet gear carrier connected to one of the primary or secondary shafts, planet gears mounted thereon, each including at least two gear sections at different diameters and at least three annular gears, i.e. sun or ring gears engaging said gear section, each of the annular gears including a friction coupling for fixing the same relative to the casing, and a servo-motor non-rotatatively mounted in the casing for controlling each of the friction couplings. A multi-position control valve controls the flow of pressurized fluid separately to each of the servo-motors. A low capacity high pressure pump delivers pressurized fluid to the control valve and a non-return valve connected in parallel with the low capacity high pressure pump opens when the servo-motor is filled. A torque converter, preferably of the releasable bladed component type may be included between the vehicle motor and the planetary gear, and in that case a control device for controlling the position of the releasable member can be operable in response to movement of the control valve.

REFERENCES:
patent: 2835136 (1958-05-01), Berthiez
patent: 2974766 (1961-03-01), Perkins et al.
patent: 3857303 (1974-12-01), Mouttet
patent: 3874254 (1975-04-01), Ahlen
patent: 3893551 (1975-07-01), Ahlen
patent: 3972246 (1976-08-01), Link

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