×

Continuously variable transmission regulation process

  • US 5,672,132 A
  • Filed: 01/22/1996
  • Issued: 09/30/1997
  • Est. Priority Date: 07/23/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. A regulation process for a continuously variable transmission (2) which has a first pair of tapered discs on an input shaft and a second pair of tapered discs on an output shaft (6 and 7) and a slip clutch (9) protecting the variable transmission from torque shock loads and overload being situated between said second pair of tapered discs (7) and an output side of said variable transmission, said process comprising the steps of:

  • determining, during operation of said continuously variable transmission (2), an actual slip torque of said clutch (9) by lowering a pressure level of the clutch from a first level (p1) to a second level (p3) which is reached when a presettable speed difference between an input and output of the clutch is detected by means of two speed sensors; and

    comparing the pressure level difference (p1 minus p3) with a characteristic operating pressure curve to establish a correction value used for adjusting said characteristic curve and securing the transmission against torque shock loads.

View all claims
  • 5 Assignments
Timeline View
Assignment View
    ×
    ×