Automatic transmission utilizing a slider for pressure distribut

Details Automatic transmission utilizing a slider for pressure distribut Automatic transmission utilizing a slider for pressure distribut

1978-08-01

1980-10-07

Nerbun, Peter P.

Machine element or mechanism

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

Preselected indexed position

B60K 4104

Patent

active

042261422

ABSTRACT:
In a hydraulic transmission in which couplings and brake bands (servo-elements) control the gear ratio and are themselves engaged and disengaged in accordance with pressure applied thereto, a motor-driven slider is provided to connect a main pressure source directly to servo-elements which will remain engaged in the newly selected gear ratio. Solenoid operated valves are interposed between the main pressure source and a second intake port of the slider. Milled channels in the slider connect this second intake port to the servo-elements to be newly engaged during the gear shift. A known gear control unit operates the valves to control the rate of change of pressure increase at the second intake port to a selected value which will limit the jolt of the vehicle to a predetermined maximum jolt.

REFERENCES:
patent: 3949627 (1976-04-01), Murakami
patent: 3958466 (1976-05-01), Espenschied

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