Interrelated power delivery controls – including engine control – Transmission control – With clutch control
Reexamination Certificate
2005-10-18
2005-10-18
Lewis, Tisha (Department: 3681)
Interrelated power delivery controls, including engine control
Transmission control
With clutch control
C477S174000, C477S180000
Reexamination Certificate
active
06955628
ABSTRACT:
A change-speed system for a utility vehicle includes a gear change-speed device operated for change speed in response to an operation of an actuator, a hydraulic clutch for selectively engaging/disengaging power transmission to the gear change-speed device, a current-controlled valve mechanism for feeding pressure oil to the hydraulic clutch and a hydraulic clutch controlling portion for controlling oil pressure in the hydraulic clutch by controlling a value of electric current to the valve mechanism. The hydraulic clutch controlling portion is operable to initiate a disengaging process of the hydraulic clutch based on initiation of the operation of the actuator and operable also to initiate an engaging process of the hydraulic clutch based on completion of the operation of the actuator. The engaging process of the hydraulic clutch includes a first engaging sub-process for rapidly raising the oil pressure to the hydraulic clutch for a predetermined period and a second engaging sub-process for gradually raising the oil pressure to the hydraulic clutch which has been temporarily dropped subsequent to the first sub-process. There is provided a manual setting device for adjusting the value of the electric current to the valve mechanism from the hydraulic clutch controlling portion in the second engaging sub-process.
REFERENCES:
patent: 5806640 (1998-09-01), Kale
patent: 6112870 (2000-09-01), Fukumoto
patent: 6692409 (2004-02-01), Fukumoto et al.
patent: 7-208595 (1995-08-01), None
Adachi Norifumi
Fukumoto Toshiya
Kubota Corporation
Lewis Tisha
LandOfFree
Change-speed system for utility vehicle does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Change-speed system for utility vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Change-speed system for utility vehicle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3451510