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Engine speed indicator for a vehicle

  • US 6,888,448 B2
  • Filed: 05/16/2002
  • Issued: 05/03/2005
  • Est. Priority Date: 05/17/2001
  • Status: Expired due to Fees
First Claim
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1. An engine speed indicator for a vehicle combustion engine, the indicator comprising:

  • a first indicator in communication with the engine and arranged to show an actual number of revolutions of the engine, and a second indicator operative to show at which number of revolutions or within which range of number of revolutions a minimal emission of at least one emission gas is obtained from a vehicle during operation of the combustion engine thereof.

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