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US 10,221,940 B2Granted
Neutral state movement protection for an automatic transmission
AssigneeFord Global Technologies, LLC
InventorKenneth Paul Wozniak
Life of this patent
Estimating the term…
Abstract
A controller is provided to, in response to a speed of the vehicle exceeding an allowable speed based on a measured grade while the vehicle is running and in neutral or park, actuating a vehicle holding mechanism to stop the vehicle.
Claims18
A system for a vehicle comprising:
- a controller configured to, in response to a speed of the vehicle exceeding an allowable speed based on a measured road grade while an engine is running and a shift lever is in a neutral or park position, actuating a vehicle holding mechanism to stop the vehicle.
A method of preventing inadvertent movement of a vehicle while running with neutral or park selected comprising:
- outputting a signal from a gradient sensor;
- outputting a signal from a speed sensor;
- and
- initiating a command to stop the vehicle in response to the speed and gradient signals wherein the command causes engagement of at least two clutches to induce a transmission tie-up.
1 more element
A system for a vehicle comprising:
- a controller configured to, in response to the vehicle moving in a direction opposite to a direction indicated by a road grade sensor while the vehicle is running and a shift lever is in a neutral or a park position, actuating a vehicle holding mechanism to stop the vehicle;
- and
- a push/tow button and associated logic, wherein actuating the vehicle holding mechanism is disabled in response to actuation of the push/tow button.
Dependencies are inferred from the claim text.