Hydromechanical transmission system

Details Hydromechanical transmission system Hydromechanical transmission system

1988-01-21

1989-04-25

Wright, Dirk

Machine element or mechanism

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

Preselected indexed position

74866, 123179R, F02N 1500, B60K 4100

Patent

active

048236470

ABSTRACT:
An arrangement is disclosed for push-starting of road vehicles of the type having an internal combustion engine and an automatic hydrodynamic transmission provided with a friction clutch, shift gears and a solenoid valve system for controlling the transmission, and where the vehicle is provided with a compressed air system for conventional uses, such as braking. A hydropneumatic actuator is provided for pressurizing the transmission system by means of stored compressed air. A manual control switch enables the push-start control. Thereafter, when the vehicle is pushed at a sufficient speed, a speed sensor activates the hydropneumatic actuator, engages a selected set of transmission gears, and engages the friction clutch, allowing the engine to be driven through the wheels of the vehicle. A second speed sensor, disables the push-start system when engine speed rises to a level indicating successful starting.

REFERENCES:
patent: 3926075 (1975-12-01), Kronstadt
patent: 4111074 (1978-09-01), Northup
patent: 4487173 (1984-12-01), Maucher et al.

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