Reaction type hydraulic steering control unit

Details Reaction type hydraulic steering control unit Reaction type hydraulic steering control unit

1983-01-07

1985-08-06

Garrett, Robert E.

Power plants

Pressure fluid source and motor

Expansible chamber type volumetric responsive measuring...

60386, 60475, F15B 1518

Patent

active

045327645

ABSTRACT:
The invention relates to a reaction hydraulic control unit for use in steering systems of the type having a differential type servomotor. In steering systems of this type having a differential piston type servomotor there exists a condition during the piston centering operation when the unit is in neutral wherein the servomotor piston has a slower centering speed when the transfer of medium is from the nonrod side to the rod side of the servomotor. The unequal centering times causes annoyance to drivers because that condition is transmitted to the steering wheel. This problem is addressed by providing steering controlled valving for exhausting fluid from the nonrod chamber of the servomotor to the system tank after the control unit has returned to its neutral position and during the centering operation of the servomotor piston.

REFERENCES:
patent: 3564848 (1971-02-01), Baatrup et al.
patent: 3636708 (1972-01-01), Karman et al.
patent: 4144947 (1979-03-01), Withers et al.
patent: 4432270 (1984-02-01), Kyster et al.
patent: 4462209 (1984-07-01), Thomsen et al.

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