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Automatic stop/restart device of vehicle engine

  • US 20010025220A1
  • Filed: 02/21/2001
  • Published: 09/27/2001
  • Est. Priority Date: 02/21/2000
  • Status: Active Grant
First Claim
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1. An engine automatic stop/restart device of a vehicle, the vehicle having a drive wheel, and a transmission mechanism which transmits a creep force to the drive wheel according to a rotation of an engine, comprising;

  • a motor for starting the engine, an inverter for supplying an exciting current and a torque current to the motor, a sensor which detects that the vehicle is stationary, a sensor which detects that a brake pedal is depressed, a sensor which detects that an accelerator pedal is depressed, and a microprocessor programmed to;

    stop the engine automatically when the vehicle is stationary with the brake pedal depressed, determine whether or not an excitation of the motor is required before startup of the motor, supply the exciting current to the motor before startup of the motor when the excitation of the motor is required before startup of the motor, inhibit supplying the exciting current to the motor before startup of the motor when the excitation of the motor is not required before startup of the motor, and restart the engine by supplying the torque current in addition to the exciting current to the motor for startup of the motor, when the accelerator pedal is depressed after the engine has automatically stopped.

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