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US 9,777,829 B2Granted
Transmission control device
AssigneePowertrain Control Solutions, LLC
InventorCharles R. Turner
Life of this patent
Estimating the term…
Abstract
An enhanced control system for an electronic automatic transmission enables the transmission to operate in a full neutral idle, a reverse lock-out, and an inching mode. These functions improve the mileage and durability of the operation of the transmission. They also enable the inching mode for use especially in industrial applications.
Claims8
An electronic automatic four-speed transmission for a vehicle, the transmission comprising:
- an electronic automatic four-speed transmission;
- the transmission controlled by a shift lever in the vehicle and also by hydraulic valves driving the hydraulic actuation of the transmission;
- two electric solenoids operatively connected to the hydraulic valves, wherein the solenoids are adapted to control the forward and reverse positions of the hydraulic valves;
- a first electric controller operatively connected to the shift lever and to the two electric solenoids;
- further wherein the first electric controller and the shift lever interact together to activate the transmission into the forward, neutral and reverse positions;
- and
- wherein the first electric controller overrides a shift lever selection of forward and reverse operation of the transmission and electronically prevents, through control of the electric solenoids, the actuation of the forward and reverse positions of the hydraulic valves in the transmission when vehicle parameters measured by the first electric controller are not compliant with a predetermined safe operation of the transmission.
4 more elements
Dependencies are inferred from the claim text.