1986-09-01

Enhancement of the Flat-Belt, Continuously-Variable Transmission Technology 861214

Development continued on the Kumm flat belt continuously variable transmission (ref. SAE 850488). Two prototype transmissions were built and tested. A plastic bearing material end cap and a drop center design on the belt drive elements resulted in low sliding friction and wear at the belt drive element - guideway interface. A 635 newton-meter, 10:1 speed ratio industrial CVT design was successfully tested. Efficiency of 96% was obtained over a wide power and speed ratio range. A 1.8 liter automotive powertrain 5.5:1 CVT was also built and tested with similar results. The hydraulic actuators provided responsive control and noise was not excessive. The next technical issues to be addressed are automatic controls and reliability.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: Purchase more aerospace standards and aerospace material specifications and save! AeroPaks off a customized subscription plan that lets you pay for just the documents that you need, when you need them.
X