Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1991-12-18
1993-05-18
Braun, Leslie A.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
747311, 192 0076, 192 33, 192 331, 474 18, 474 28, B60K 4114, F16H 6114
Patent
active
052110834
ABSTRACT:
A hydraulic control apparatus for controlling a vehicle power transmitting system including a belt-and-pulley type continuously variable transmission and a torque converter provided with a lock-up clutch. The transmission includes a pair of hydraulic actuators one of which receives a belt tensioning pressure for controlling a tension of a transmission belt. The hydraulic control apparatus includes a lock-up clutch control valve which is selectively placed in an engaging and a releasing position for engaging and releasing the lock-up clutch, respectively, a slip control valve for controlling an amount of slipping of the lock-up clutch until the clutch is fully engaged, a pressure control device for raising the belt tensioning pressure so as to increase the tension of the transmission belt; and a pilot-pressure generating device for applying a pilot pressure simultaneously to the slip control valve and the pressure control means, so that the belt tensioning pressure is raised while the slip control valve controls the amount of slipping of the lock-up clutch.
REFERENCES:
patent: 3640151 (1972-02-01), Sumiyoshi et al.
patent: 3701294 (1972-10-01), Ito et al.
patent: 4004417 (1977-01-01), Woody et al.
patent: 4274520 (1981-06-01), Van der Hardt Aberson
patent: 4468988 (1984-09-01), Hiramatsu
patent: 4478105 (1984-10-01), Yamamuro et al.
patent: 4660697 (1987-04-01), Yoneda et al.
patent: 4665773 (1987-05-01), Hiramatsu et al.
patent: 4720003 (1988-01-01), Murasugi
patent: 4747808 (1988-05-01), Moan
patent: 4843918 (1989-07-01), Morimoto
patent: 4846765 (1989-07-01), Sakai
patent: 5010990 (1991-04-01), Yoshimura et al.
patent: 5086889 (1992-02-01), Nobumoto et al.
patent: 5090527 (1992-02-01), Imamura et al.
Hattori Yuji
Kato Nobuyuki
Soga Yoshinobu
Sugaya Masami
Braun Leslie A.
Henn David E.
Toyota Jidosha & Kabushiki Kaisha
LandOfFree
Hydraulic control apparatus for power transmitting system includ does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic control apparatus for power transmitting system includ, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic control apparatus for power transmitting system includ will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-797714