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US 10,295,053 B2Granted
Method and control for operating transmission during clutch failure
AssigneeFord Global Technologies, LLC
InventorsStephen Michael Cicala, John Randall Armstead, Dongdong Dee Li, Alexander Phillip McDonnell, Bradley D. Riedle, Conor Edward Sullivan
Life of this patent
Estimating the term…
Abstract
A vehicle includes a transmission having a first neutral with a first combination of engaged clutches and a second neutral with a second combination of engaged clutches. The second neutral has more engaged clutches than the first neutral. A vehicle controller is programmed to, in response to a request to shift from the first to the second neutral and a failed-on clutch being detected, inhibit the shift to remain in the first neutral.
Claims20
A vehicle comprising:
- a transmission having a first neutral with a first combination of engaged clutches and a second neutral with a second combination of engaged clutches, the second neutral having more engaged clutches than the first;
- and
- a controller programmed to, in response to a request to shift from the first to the second neutral and a failed-on clutch being detected, inhibit the shift to remain in the first neutral.
A vehicle comprising:
- a transmission including clutches and having first and second neutrals with different combinations of the clutches engaged, the second neutral having more engaged clutches than the first;
- and
- a controller programmed to
- begin engaging one of the clutches to shift from the first to the second neutral, and
- abort engaging the one of the clutches in response to a failed-on clutch being detected to keep the transmission in the first neutral.
2 more elements
A vehicle comprising:
- an engine including a crankshaft;
- a transmission including an input shaft, an output shaft, and gear box having planetary gear sets and a plurality of clutches configured to couple select components of the planetary gear sets to establish various speed ratios between the input shaft and the output shaft, wherein the transmission has a first neutral in which a first combination of the clutches are engaged and a second neutral in which a second combination of the clutches are engaged, wherein the second neutral includes a greater number of engaged clutches than the first neutral with the second combination including all of the clutches of the first combination and at least one additional clutch;
- a torque converter including an impeller fixed to the crankshaft and a turbine fixed to the input shaft;
- and
- a controller programmed to (i) begin engaging the at least one additional clutch of the second combination to begin shifting from the first neutral to the second neutral, and (ii) abort engaging the additional clutch to remain in the first neutral in response to another of the clutches, that is not included in the first and second combinations, being failed-on.
2 more elements
Dependencies are inferred from the claim text.