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Hybrid vehicle and method of controlling hybrid vehicle

  • US 6,784,563 B2
  • Filed: 11/25/2002
  • Issued: 08/31/2004
  • Est. Priority Date: 05/24/2000
  • Status: Expired due to Term
First Claim
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1. A hybrid vehicle with an engine, a generator, and a motor mounted thereon, said engine outputting power through combustion of a fuel, said generator generating electric power with at least part of the power output from said engine, said motor outputting power to a drive shaft of said hybrid vehicle, said hybrid vehicle comprising:

  • an engine control unit that feedback controls a quantity of the fuel injected to said engine to attain a specified target revolving speed of said engine;

    a generative energy computation unit that computes an instantaneous magnitude of generative energy to be generated by said generator by taking into account an energy balance in a system including said engine, said generator, and said motor;

    a voltage measurement unit that measures a generative voltage of said generator;

    a control variable computation unit that computes a feedback control variable corresponding to a difference between the observed generative voltage and a target generative voltage of said generator;

    a generator control unit that feedback controls said generator with the calculated instantaneous magnitude of generative energy and the calculated feedback control variable;

    a requirement detection unit that detects a requirement on a drive of said vehicle; and

    a motor driving unit that calculates an output torque of said motor based on a direct torque output from said generator, which is under control of said generator control unit, and a required torque related to the detected requirement on the drive of said vehicle, and drives said motor to attain the calculated output torque.

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