Control of belt-drive continuously variable transmission

Details Control of belt-drive continuously variable transmission Control of belt-drive continuously variable transmission

2007-09-11

2007-09-11

Ho, Ha D. (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

C477S107000

Reexamination Certificate

active

10825112

ABSTRACT:
A controller (50) controls the supply of oil pressure to a primary pulley (41) and a secondary pulley (42) of a belt-drive continuously variable transmission (1) in accordance with the depression amount of an accelerator pedal (81) of a vehicle. When slippage is detected in a V-belt (43) that is wrapped around the primary pulley (41) and secondary pulley (42), the controller (50) reduces the output torque of an engine (70) of the vehicle to stop the V-belt (43) from slipping. Meanwhile, damage to the V-belt (43) caused by slippage is prevented by reducing the oil pressure supply to the secondary pulley (42).

REFERENCES:
patent: 4680987 (1987-07-01), Morimoto
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patent: 5042325 (1991-08-01), Sawasaki et al.
patent: 6530860 (2003-03-01), Ui
patent: 6829528 (2004-12-01), Kang et al.
patent: 2001/0023216 (2001-09-01), Bolz et al.
patent: 2002/0004437 (2002-01-01), Asayama et al.
patent: 11-139184 (1999-05-01), None

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