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Shift shock reducing system for continuously variable transmission

  • US 5,658,217 A
  • Filed: 09/14/1995
  • Issued: 08/19/1997
  • Est. Priority Date: 09/14/1994
  • Status: Expired due to Term
First Claim
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1. A shift shock reducing system for a continuously variable transmission powered by an engine with a fuel cut-off means for interrupting fuel supply during a coasting state, wherein the continuously variable transmission is controllable to transmit engine power output from the engine with a continuously variable speed ratio, the system comprising:

  • speed ratio detecting means for detecting the speed ratio of said transmission;

    shifting response delay setting means for setting a shifting response delay of said transmission depending upon the speed ratio detected by said speed ratio detecting means;

    driving condition transition detecting means for detecting a transition from a coasting state to a power-on driving state; and

    fuel recovery delay means for issuing a command for making said fuel cut-off means inoperative for a predetermined period derived on the basis of said shifting response delay set by said shifting response delay setting means, after detection of said transition from the coasting state to the power-on driving state by said driving condition transition detecting means for synchronizing rising of said engine output with actual initiation of shifting of said transmission.

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