Transmission control with limp-home function

Details Transmission control with limp-home function Transmission control with limp-home function

1992-07-31

1993-10-12

Lorence, Richard M.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 358, 192 362, 192 363, 74850, 74866, B60K 4128

Patent

active

052517330

ABSTRACT:
A control system for a vehicle powershift transmission includes a set of electrical connectors which in a normal mode, permit electrical power to be transmitted to microprocessor-controlled valve drivers for the transmission clutch control valves. These connectors may be swapped, in a limp-home mode, to permit power to be transmitted directly to the transmission clutch control valves. In both modes, a start-in-gear protection circuit including a pair of relays and switches coupled to the shift lever prevents the vehicle from being started up with a gear engaged. In the limp-home mode, a limp-home relay and a clutch disengaged switch prevents gear engagement until the operator has depressed and then released the clutch pedal, and the clutch pedal may be operated to modulate and control gear engagement.

REFERENCES:
patent: Re34064 (1992-09-01), Tury et al.
patent: 4855913 (1989-08-01), Brekkestran et al.
Deere & Company, "8560, 8760 and 8960 Schematic, Chart No. 5, RW19653", (not published).
Deere & Company, "8560, 8760 and 8960 Tractors Operation and Tests, Technical Manual", Mar. 1992, p. 240-50-17.
Ford New Holland, "Part 5-Transmission System", 1990, Chapters 5 and 6.
Ford New Holland, "Powershift Transmission Main Wiring Diagram", 1990.

Affiliated with

Also associated with

Rating

Transmission control with limp-home function does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Transmission control with limp-home function, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmission control with limp-home function will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1898487