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Method of automatic gear selection in a vehicle power transmission

  • US 4,517,646 A
  • Filed: 07/27/1982
  • Issued: 05/14/1985
  • Est. Priority Date: 11/28/1980
  • Status: Expired due to Fees
First Claim
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1. A method for generating a gear selection signal in a vehicle having an engine, a mechanical power transmission which includes a plurality of gears, and a storage means for storing a plurality of gear selection tables, each said gear selection table including a respective upper and lower speed limit for each of said gears, said method comprising the steps of:

  • storing for each of a plurality of time intervals, a set of values representative of the speed of said vehicle, the acceleration of said vehicle, and the load of said engine during the respective time interval;

    selecting one of said gear selection tables as a function of said stored values which relate to the engine load and acceleration of said vehicle at least 0.5 seconds before the most recently stored speed value; and

    generating a gear selection signal indicative of that gear whose respective upper and lower speed limits, as defined by said selected gear selection table, encompasses the most recently sensed speed value.

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