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Control for an electromagnetic brake for a multiple-ratio power transmission in a vehicle powertrain

  • US 7,597,651 B2
  • Filed: 03/07/2006
  • Issued: 10/06/2009
  • Est. Priority Date: 01/20/2004
  • Status: Active Grant
First Claim
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1. A control system for a power input shaft brake in a powertrain for a vehicle powered by an engine, an accelerator pedal and a transmission with a power input shaft driven by the engine, the control system comprising:

  • a brake system controller;

    a power input shaft brake switch that may be switched between a brake-on condition and a brake-off condition, wherein the conditions are provided to the controller;

    an accelerator pedal position switch that provides to the controller a signal indicative of the position of the accelerator pedal within a pedal stroke range;

    a vehicle speed sensor that provides to the controller a signal representative of vehicle speed; and

    a timer for measuring the time the brake is applied;

    the timer being characterized by a predetermined timer setpoint for limiting a duration the brake is applied;

    the controller being configured to enable the brake when the power input shaft brake switch is closed, the accelerator pedal position is less than a predetermined portion of the stroke range and the vehicle speed is below a predetermined value.

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