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Method and device for determining the starting capability of a vehicle

  • US 7,026,787 B2
  • Filed: 03/05/2002
  • Issued: 04/11/2006
  • Est. Priority Date: 05/26/2001
  • Status: Expired due to Term
First Claim
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1. A method for determining the ability of a vehicle to start, comprising the steps of:

  • sensing current values (I) and voltage values (U) of a battery during a predefined time window,determining an internal resistance (RI) of the battery by reference to the current values (I) and the voltage values (U) by means of linear regression,determining a reference resistance value (RS) for the starting behavior of the vehicle by reference to a maximum value (IMAX) for the current (I) and a minimum value (UMIN) for the voltage (U) which are sensed within the predefined time window anddetermining a value which represents the ability to start by reference to a comparison between the internal resistance (RI) and the reference resistance value (RS).

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