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US 10,295,054 B2Granted
Method and control for operating transmission during clutch failure when shifting from gear to neutral
AssigneeFord Global Technologies, LLC
InventorsJohn Randall Armstead, Stephen Michael Cicala, Alexander Phillip McDonnell, Dongdong Dee Li, 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 first neutral has more engaged clutches than the second. A controller is programmed to, in response to a request to shift from a drive gear to the first neutral and a clutch of the drive gear being failed-on, shift to the second neutral.
Claims20
A vehicle comprising:
- a transmission including a drive gear ratio (drive) established by a set of engaged clutches, a first neutral established by releasing a first clutch of the set, and a second neutral established by releasing the first clutch and a second clutch of the set;
- and
- a controller programmed to (i) command a shift from drive to the first neutral, and (ii) command a shift from drive to the second neutral in response to slip not being detected on the first clutch.
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 first neutral having more engaged clutches than the second;
- and
- a controller programmed to, in response to a request to shift from a drive gear to the first neutral and a clutch of the drive gear being failed-on, shift to the second neutral.
A vehicle comprising:
- a transmission including a drive gear established by a set of engaged clutches;
- and
- a controller programmed to
- command release of a first clutch of the set to shift the transmission from the drive gear to a first neutral, and
- command release of a second clutch of the drive gear, responsive to slip not being detected on the first clutch within a threshold time, to shift to a second neutral.
2 more elements
Dependencies are inferred from the claim text.