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Vehicular system capable of suitably controlling engine speed and gear ratio according to battery charge state

  • US 20080246285A1
  • Filed: 04/02/2008
  • Published: 10/09/2008
  • Est. Priority Date: 04/06/2007
  • Status: Active Grant
First Claim
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1. A vehicular system comprising:

  • a battery;

    an engine;

    an electric generator that is driven by the engine to generate electric power and thereby charge the battery;

    a first control apparatus that controls operations of the battery and the electric generator;

    a drive shaft;

    a Continuously Variable Transmission (CVT) that transmits rotation of the engine to the drive shaft at a continuously variable gear ratio; and

    a second control apparatus that controls operations of the engine and the CVT,wherein the first control apparatus comprises;

    means for detecting charge/discharge current of the battery;

    means for monitoring the State of Charge (SOC) of the battery based on the charge/discharge current detected by the detecting means;

    means for informing, when there is a decrease in the SOC of the battery monitored by the monitoring means, the second control apparatus of the decrease in the SOC of the battery;

    means for setting, when there is the decrease in the SOC of the battery, a target charge current of the battery for recovering the decreased SOC of the battery; and

    means for controlling the electric generator to increase the amount of the electric power generated by the electric generator, thereby supplying the battery with the target charge current set by the setting means.

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