Interrelated power delivery controls – including engine control – Transmission control – Continuously variable friction transmission
Patent
1997-09-30
2000-11-14
Ta, Khoi Q.
Interrelated power delivery controls, including engine control
Transmission control
Continuously variable friction transmission
477 45, 475211, F16H 3702, B60K 4100
Patent
active
061463086
ABSTRACT:
In a neutral N control for substantially equalizing axial forces to act on two pulleys, a belt type continuously variable transmission (CVT) self-converges into the gear neutral point (GN) at which the output shaft RPM takes the value 0. When the convergence is made to the GN point to establish a no-load state, the CVT establishes a force F.sub.A to converge into a pulley ratio of 1.0, in which it is stabilized by itself. A converging force F.sub.N to the GN point and the force F.sub.A toward the pulley ratio of 1.0 are repeated in a vortex shape in the load state and in the no-load state to establish a creep force. This creep force can be modified by generating a force F.sub.O against the force F.sub.A.
REFERENCES:
patent: 4990127 (1991-02-01), Roberts et al.
patent: 5011458 (1991-04-01), Kumm
patent: 5813933 (1998-09-01), Tsukamoto et al.
patent: 5961418 (1999-10-01), Taniguchi et al.
patent: 5971887 (1999-10-01), Hattori et al.
Hattori Masashi
Inuzuka Takeshi
Miyagawa Shoichi
Nozawa Hirofumi
Sakakibara Shiro
Aisin Aw Co. Ltd.
Ta Khoi Q.
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