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Lambda sensor with electric heater

  • US 5,696,313 A
  • Filed: 04/10/1996
  • Issued: 12/09/1997
  • Est. Priority Date: 04/14/1995
  • Status: Expired due to Fees
First Claim
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1. An apparatus for determining the concentration of gas components in exhaust gas from a motor vehicle, comprisinga sensor element;

  • an electric heater thermally coupled to said sensor element;

    a voltage source supplying power to said electric heater; and

    a control unit controlling supply of power to said heater;

    whereinsaid voltage source includes at least a first voltage source and a second voltage source, said control unit controlling which one of said first and second voltage sources is applied to said heater at each instant; and

    one of said first and second voltage sources being directly connected from an alternator/generator.

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