Dual clutch application area and control

Details Dual clutch application area and control Dual clutch application area and control

1987-10-09

1989-10-24

Bonck, Rodney H.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 0076, 192 85AA, 192103F, B60K 4102, F16D 2514

Patent

active

048755613

ABSTRACT:
An adaptive clutch torque capacity control for an automotive vehicle clutch utilizing a dual area apply piston for engagement of the clutch plate for accurate control over a larger than normal torque range. The use of two piston areas allows one area to be controlled in a "coarse" fashion, while the other piston area, which is generally a small area, provides a "vernier" or fine adjustment control. The small area piston is controlled by an electronic closed loop for fine adjustment of any errors occurring in the "coarse" control.

REFERENCES:
patent: 3262531 (1966-07-01), Black et al.
patent: 3273415 (1966-09-01), Frost
patent: 3753478 (1973-08-01), Shiber
patent: 4147245 (1979-04-01), Folomin et al.
patent: 4361217 (1982-11-01), Bieber et al.
patent: 4558772 (1985-12-01), Grimes et al.
patent: 4648496 (1987-03-01), Petzold et al.
patent: 4664242 (1987-05-01), Downs
patent: 4757886 (1988-07-01), Brown et al.
Werter P. Petzold et al., U.S. patent application Ser. No. 25,391 filed Mar. 13, 1987 for "Continuously Variable Transmission Clutch Control System".

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