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Electric motorized brake-lock system

  • US 5,505,528 A
  • Filed: 10/03/1994
  • Issued: 04/09/1996
  • Est. Priority Date: 01/13/1993
  • Status: Expired due to Term
First Claim
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1. A method of automatically activating vehicle brakes in a vehicle of the type having a primary braking control system including a master cylinder for providing hydraulic pressure to control the vehicle brakes, the method comprising the steps of:

  • (a) fully pressurizing the vehicle brakes in response to a first predetermined vehicle operating condition, wherein the primary braking control system is removed from control of the vehicle brakes, and wherein the fully pressurizing step includes the steps of;

    (i) activating an auxiliary hydraulic fluid pump to provide a source of pressurized hydraulic fluid;

    (ii) segregating the master cylinder from the vehicle brakes in response to the pressurized hydraulic fluid, wherein the primary braking control system is not operatively connected to the vehicle brakes;

    (iii) applying pressure to the vehicle brakes in response to the pressurized hydraulic fluid; and

    (iv) deactivating the auxiliary hydraulic fluid pump when the vehicle brakes are fully pressurized; and

    (b) fully de-pressurizing the vehicle brakes in response to a second predetermined vehicle operating condition, the fully de-pressurizing step including the step of returning control of the vehicle brakes to the primary braking control system by activating the auxiliary hydraulic fluid pump in reverse to withdraw hydraulic fluid pressure and operatively reconnect the master cylinder to the vehicle brakes.

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