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Jackknifing-angle limiting device for articulated motor vehicle

  • US 4,366,966 A
  • Filed: 12/24/1980
  • Issued: 01/04/1983
  • Est. Priority Date: 12/28/1979
  • Status: Expired due to Fees
First Claim
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1. A jackknifing limiting device for articulated motor vehicles wherein said vehicle has a front section and a rear section which are connected by a hinge therebetween, said device acting to limit the angle between said front and rear section when said vehicle is turning, said device comprising:

  • a pair of hydraulic cylinders flanking said hinge and connected between said front and rear sections;

    a reservoir containing hydraulic fluid for said cylinders;

    respective pressure regulating valves connected between said reservoir and said cylinders and opening unidirectionally toward said reservoir;

    respective solenoid stop valves connected between said pressure regulating valves and said reservoir, said solenoid stop valves being normally open;

    respective check valves provided in respective bypass lines connected between said reservoir and said cylinders, said check valves opening unidirectionally toward said cylinders; and

    respective switches connected to said solenoid valves and being selectively operable upon the turning of said vehicle in a particular direction, said switches acting to selectively energize and close the respective solenoid valve associated with the cylinder on the side of said hinge opposite from the direction of turning, the closing of said respective solenoid valve acting to prevent the opening of the respective pressure regulating valve associated therewith.

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