Steering assistance pump

F - Mech Eng,Light,Heat,Weapons – 04 – B

Patent

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103/11, 180/55,

F04B 49/10 (2006.01) B62D 5/06 (2006.01)

Patent

CA 1245911

ABSTRACT OF THE INVENTION A steering assistance pump includes a temperature sensor valve which communicates with an inlet duct of the pump by way of an additional, normally closed outlet passage. When a pressure relief valve responds, upon blocking of the servo steering means, the temperature of the hydraulic fluid in the system increases to such a degree that it exceeds the limit value of the temperature sensor valve. The valve thus opens to cause the pilot control pressure in the control chamber of the pressure relief valve to be reduced, whereby the pump pressure itself is also reduced.

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