The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 2021
Filed:
Mar. 02, 2017
Toyota Motor Engineering & Manufacturing North America, Inc., Erlanger, KY (US);
Luke A. Rippelmeyer, Canton, MI (US);
Nicholas S. Vernon, Brighton, MI (US);
Toyota Motor Engineering & Manufacturing North America, Inc., Plano, TX (US);
Abstract
A continuously variable transmission, a vehicular powertrain that includes a continuously variable transmission and a method of limiting belt slippage in a continuously variable transmission in a vehicle. The continuously variable transmission includes a pulley assembly, shafts, a clutch and hydraulic system. The hydraulic system is cooperative with both the clutch and the pulley assembly so that hydraulic pressures and associated clamping forces sent to both allow the clutch to preferentially absorb any driving load coming from the axle and wheels that is in excess of the normal load experienced at the continuously variable transmission. This in turn means that any additional load that would ordinarily cause slippage in the belt is instead experienced by the clutch. By providing such a clutch, the pump of the hydraulic system does not need to be oversized in order to provide excess clamping force, as any excess load experienced by the shaft that is coupled to the wheels of the vehicle will be taken up by slippage in the clutch so that slippage-related wear to the belt is avoided.