Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Transmission control
Patent
1995-10-19
1998-09-15
Nguyen, Tan Q.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Transmission control
701 62, 701 67, 477 89, 477125, B60K 4108
Patent
active
058094415
ABSTRACT:
A control system for a work vehicle transmission includes a sensor for detecting the output speed of the vehicle engine and an operator-movable command device for placing the transmission in a neutral condition. The transmission includes a plurality of intermeshing gears, and clutches associated with certain of the gears for selectively placing the transmission in various gear ratios for driving the vehicle. The clutches are engaged and disengaged by fluid valving in response to energization of solenoid coils driven by valve driver circuits. The sensor, the command device and the driver circuits are coupled to a control circuit, preferably including a microprocessor, for controlling engagement and disengagement of the transmission clutches. Upon startup, the control circuit disables the driver circuits to place the transmission in a neutral condition despite the position of the command device. The control circuit maintains the driver circuits disabled until the vehicle engine is running, as indicated by the speed sensor, and a neutral command signal is received. The neutral start routine serves as a redundant system with an analog neutral start circuit that normally disables the vehicle starter unless a neutral transmission condition is commanded upon startup. The system thus provides a neutral start feature in the event the neutral start circuit fails or is defeated, such as by jump starting the vehicle engine.
REFERENCES:
patent: 2848988 (1958-09-01), Binder
patent: 3285361 (1966-11-01), Baker
patent: 3444968 (1969-05-01), Golan et al.
patent: 3574288 (1971-04-01), Barth et al.
patent: 3689775 (1972-09-01), Smith et al.
patent: 4051915 (1977-10-01), Behrens
patent: 4227598 (1980-10-01), Luft
patent: 4267804 (1981-05-01), Rypka
patent: 4421082 (1983-12-01), Katayose et al.
patent: 4425620 (1984-01-01), Batcheller et al.
patent: 4487303 (1984-12-01), Boueri et al.
patent: 4514811 (1985-04-01), Daubenmier et al.
patent: 4610179 (1986-09-01), Parker
patent: 4650048 (1987-03-01), Gregerson et al.
patent: 4718307 (1988-01-01), Yabe et al.
patent: 4916983 (1990-04-01), Amrein et al.
patent: 5082097 (1992-01-01), Goeckner et al.
patent: 5111921 (1992-05-01), Marks et al.
patent: 5251733 (1993-10-01), Falck et al.
patent: 5261456 (1993-11-01), Patton et al.
patent: 5475561 (1995-12-01), Goeckner et al.
Case Corporation
Nguyen Tan Q.
LandOfFree
Apparatus and method of neutral start control of a power transmi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method of neutral start control of a power transmi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method of neutral start control of a power transmi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-103902