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Vehicle state analysis system and its analysis method

  • US 6,694,806 B2
  • Filed: 09/18/2001
  • Issued: 02/24/2004
  • Est. Priority Date: 09/20/2000
  • Status: Expired due to Term
First Claim
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1. A vehicle state analysis system for a vehicle with an engine, comprising:

  • means for estimating a brake specific fuel consumption under remaining running conditions based on generic brake specific fuel consumption characteristic data and a known actual brake specific fuel consumption under a certain running condition of the engine, and for generating an engine performance map which specifies the relation between the running conditions and the brake specific fuel consumption, means for computing the brake specific fuel consumption of the engine by looking up the engine performance map based on the running conditions of the vehicle being analyzed, means for computing a fuel consumption amount from the computed brake specific fuel consumption and engine output, and means for computing the fuel consumption rate from the computed fuel consumption amount and vehicle running distance.

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