192 clutches and power-stop control – Transmission control and clutch control – Interrelated
Patent
1988-02-26
1989-09-12
Braun, Leslie A.
192 clutches and power-stop control
Transmission control and clutch control
Interrelated
192 52, 192 8713, 192109F, F16D 2514
Patent
active
048651761
ABSTRACT:
Inching valves for providing controlled slow movement of a vehicle normally have a valve mechanism therein to control the pressure level of the fluid being directed to the driving clutch of the vehicle. Upon release of the pedal, a sudden jerk of the vehicle may occur. The modulating inching valve of the subject arrangement provides a housing having a valving mechanism slidably disposed therein and operative to selectively block communication between an inlet port and an outlet port. The modulating inching valve further includes an input actuator mechanism operative to selectively control the valve mechanism in response to the position of the operator's inching pedal. Through a portion of a predetermined travel distance of the input mechanism the operator controls the rate of pressure being supplied to the fluid actuated device and during the remaining portion of the predetermined travel distance the modulating relief valve automatically controls the rate of pressure rise. The modulating inching valve provides a compact arrangement allowing selective control of the pressure level to the fluid actuator device at lower torque levels within the clutch but inhibits the operator'3 s ability to control the rate of pressure rise to the clutch during higher torque levels. This eliminates undue heat and abnormal wear of the elements and further eliminates the tendency of the vehicle to jerk if the inching pedal is fully released quickly.
REFERENCES:
patent: 3137311 (1964-06-01), Rohweder et al.
patent: 3923076 (1975-12-01), Blake
patent: 4036342 (1977-07-01), Finn
patent: 4150737 (1979-04-01), Patton
patent: 4349094 (1982-09-01), Pavesi
patent: 4474082 (1984-10-01), Spokas et al.
patent: 4676348 (1987-06-01), Coutant
Blake William W.
Coutant Alan R.
Golan Kenneth F.
Morris Hugh C.
Braun Leslie A.
Burrows J. W.
Caterpillar Inc.
Testardi David A.
LandOfFree
Modulating inching valve with automatic pressure control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Modulating inching valve with automatic pressure control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modulating inching valve with automatic pressure control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-909765