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Apparatus and method for assisting gear engagement in controlling the automatic shifting of a manual-automatic transmission

  • US 5,638,271 A
  • Filed: 01/04/1995
  • Issued: 06/10/1997
  • Est. Priority Date: 01/04/1995
  • Status: Expired due to Fees
First Claim
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1. A method of assisting automatic gear engagement after gear disengagement in a vehicle having an engine with a throttle capable of operator control and of being inhibited from operator control, and a manual/automatic transmission including manually selectable gear ratios and a plurality of automatically selectable gear ratios, the method comprising the steps of:

  • inhibiting operator control of the throttle;

    fueling the engine to achieve a synchronous engine speed;

    commanding the transmission to engage one of the plurality of automatically selectable gear ratios;

    increasing the engine speed to a first speed level above said synchronous engine speed;

    decreasing the engine speed to a second speed level below said synchronous engine speed; and

    returning throttle control to the operator if the transmission engages said one of the plurality of automatically selectable gear ratios during execution of any of said commanding, increasing and decreasing steps.

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