192 clutches and power-stop control – Vortex-flow drive and clutch – Including drive-lockup clutch
Patent
1983-08-15
1984-05-29
Krizmanich, George H.
192 clutches and power-stop control
Vortex-flow drive and clutch
Including drive-lockup clutch
192 358, 192103R, F16H 4502
Patent
active
044509413
ABSTRACT:
A transmission control system is provided for use with a transmission assembly having a torque converter which couples a power input member with a transmission speed ratio section. A lock-up clutch is provided to selectively bypass the torque converter and couple the input member directly with the transmission speed ratio section. Some systems provide converter lock-up and lower transmission control pressure resposive to positioning of the transmission speed selector valve while others require additional complicated controls to operate the lock-up clutch of the converter and reduce transmission control pressure relative to the vacuum level of the prime mover. In the subject arrangement, a single valve (112) that is responsive to the output speed of the transmission (10) simultaneously actuates the lock-up clutch (32) of the torque converter (14) and lowers the operating pressure level of a dual stage pressure relief valve (72) by directing a fluid pressure signal to an actuating chamber (106) of the dual stage pressure relief valve (72). This arrangement ensures that the output speed of the transmission is operated at a sufficient low torque level before the lock-up clutch is actuated and furthermore does not require numerous complicated controls to lower the transmission control operating pressure and actuate the lock-up clutch.
REFERENCES:
patent: 2978928 (1961-04-01), Tuck et al.
patent: 3321056 (1967-05-01), Winchell et al.
patent: 3386540 (1968-06-01), Horsch et al.
patent: 3390594 (1968-07-01), Gillespie
patent: 3505907 (1970-04-01), Fox et al.
patent: 3693478 (1972-09-01), Malloy
patent: 3857302 (1974-12-01), Morris
patent: 3985046 (1976-10-01), Morris et al.
patent: 4095486 (1978-06-01), Ohnuma
patent: 4270636 (1981-06-01), Sunohara et al.
patent: 4281676 (1981-08-01), Morris
patent: 4294140 (1981-10-01), Iwanaga et al.
Burrows J. W.
Caterpillar Tractor Co.
Krizmanich George H.
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