Continuously variable transmission with bias springs on the driv

Details Continuously variable transmission with bias springs on the driv Continuously variable transmission with bias springs on the driv

1996-12-26

1998-09-29

Ta, Khoi Q.

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

Speed responsive

474 18, 474 28, 477 45, F16H 926

Patent

active

058139338

ABSTRACT:
A continuously variable transmission has springs, which urge the movable sheaves of primary-side and secondary-side pulleys, set to achieve a pulley ratio r.sub.1 approximate to or within a predetermined range of a neutral pulley ratio r.sub.N so that a vehicle takeoff response delay is eliminated when the driver shifts the transmission from a vehicle stop range (the P or N range) to the drive range (D range). This setting prevents a vehicle from moving backward when the driver shifts from the vehicle stop range to the D range immediately after starting the engine. The pulley ratio r.sub.1 can be achieved either before or after the minimum required fluid pressure is supplied.

REFERENCES:
patent: 3131581 (1964-05-01), Graybill
patent: 4467670 (1984-08-01), Kawamoto
patent: 4585430 (1986-04-01), Gaddi
patent: 4589858 (1986-05-01), Gaddi
patent: 4644820 (1987-02-01), Macey
patent: 4683338 (1987-07-01), Snel et al.
patent: 4990127 (1991-02-01), Roberts et al.
patent: 5050457 (1991-09-01), Takayama et al.
patent: 5334104 (1994-08-01), Schuermans
patent: 5669846 (1997-09-01), Moroto et al.
Patent Abstracts of Japan, vol. 12, No. 109 Apr. 8, 1988, 62 237166.
European Search Report, Mar. 18, 1997.
Abstract 96119290.3.

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