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:
Oct. 12, 1999
Filed:
Sep. 04, 1997
Shigeru Kanehara, Wako, JP;
Kenichi Namerikawa, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A process for presuming a power-transmitted state in a metal belt-type continuously variable transmission and for controlling axial thrust in a metal belt-type continuously variable transmission wherein it is presumed that a vector sum of friction coefficients .mu..sub.TDN and .mu..sub.RDN of a driven pulley is 0.1; a friction coefficient .mu..sub.RDR of a drive pulley is 0, and a friction coefficient .mu..sub.SDR or .mu..sub.SDN of the one of the pulleys which has a smaller winding radius is 0.1. A speed ratio i, a number N.sub.IN of rotations of the drive pulley, an input torque T.sub.IN to the drive pulley and an axial thrust Q.sub.DN of the driven pulley are measured, and the measured values are introduced into relational equations of the balance of forces on various portions of a metal belt-type continuously variable transmission. In this manner, an axial thrust Q.sub.DR of the drive pulley, urging forces E.sub.1 and E.sub.2 between the blocks and the pulleys, an axis-axis force FS, ring tensions T.sub.1 and T.sub.2, a friction coefficient .mu..sub.TDR, a friction coefficient .mu..sub.TDN, a friction coefficient .mu..sub.RDN, and a friction coefficient .mu..sub.SDR or .mu..sub.SDN of the one of the pulleys which has a larger winding diameter can be calculated from the relational equations. Thus, a power-transmitted state such as the friction coefficient can be presumed without actual generation of a slipping between a metal belt and a pulley of the metal belt-type continuously variable transmission.