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Control systems for continuously variable ratio transmissions (CVT)

  • US 4,464,952 A
  • Filed: 06/01/1981
  • Issued: 08/14/1984
  • Est. Priority Date: 05/31/1980
  • Status: Expired due to Term
First Claim
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1. In a transmission of the type having a continuously variable ratio unit, further gearing, clutch means for operating the transmission in two regimes with synchronous shifting between the regimes, and control means for varying the transmission ratio according to a predetermined control strategy ratio in dependence on load and engine speed, the improvement comprising, means to inhibit regime changing from the synchronous ratio until the synchronous ratio differs from the predetermined control strategy ratio by at least a predetermined value.

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