Back to results
US 8,574,121 B1Granted
Park disengagement clunk mitigation
AssigneeFord Global Technologies, LLC
InventorKurt H. Nickerson
Life of this patent
Estimating the term…
Abstract
A method for controlling a transmission gearshift includes engaging control elements whose engagement is required for operation in first gear and reverse gear without grounding the transmission's input, grounding said input provided a range other than park is selected, grounding the transmission's output, releasing the input, producing first gear provided first gear is selected, and producing reverse gear provided reverse gear is selected.
Claims12
A method for controlling a transmission gearshift, comprising:
- (a) without grounding an input of the transmission, engaging control elements whose engagement is required for operation in first gear and reverse gear;
- (b) grounding said input provided a range other than park is selected;
- (c) grounding an output of the transmission;
- (d) releasing said input;
- (e) producing first gear, provided first gear is selected;
- (f) producing reverse gear, provided reverse gear is selected.
3 more elements
A method for controlling a transmission gearshift, comprising:
- (a) grounding an input of the transmission, provided a range other than park is selected;
- (b) grounding an output of the transmission;
- (c) releasing said input;
- (d) producing first gear, provided first gear is selected;
- (e) producing reverse gear, provided reverse gear is selected.
2 more elements
Dependencies are inferred from the claim text.