Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Transmission control
Patent
1997-09-04
1999-10-12
Nguyen, Tan
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Transmission control
701 66, 474 8, 477 37, F16H 900
Patent
active
059648180
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.
REFERENCES:
patent: 5766105 (1998-06-01), Fellows et al.
Kanehara Shigeru
Namerikawa Kenichi
Honda Giken Kogyo Kabushiki Kaisha
Nguyen Tan
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