Prestroking engine disconnect clutch in a hybrid vehicle
US-2015291144-A1 · Oct 15, 2015 · US
Methods and system for applying a driveline disconnect clutch
US2018119758A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018119758-A1 |
| Application number | US-201715802134-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 2, 2017 |
| Priority date | Jul 30, 2014 |
| Publication date | May 3, 2018 |
| Grant date | — |
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Abstract
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Systems and methods for improving operation of a driveline disconnect clutch for a hybrid vehicle shifting are presented. In one example, pressure of a working fluid supplied to the driveline disconnect clutch is adjusted in response to a rate of change in accelerator pedal position. Further, pressure of the working fluid may be decreased responsive to selected operating conditions.
First claim
Opening claim text (preview).
1 . A driveline method, comprising: increasing driveline disconnect clutch working fluid pressure in response to a rate of change in accelerator pedal position. 2 . The method of claim 1 , where increasing driveline disconnect clutch working fluid pressure provides a start of closing pressure after a driveline disconnect clutch is stroked to a position where driveline disconnect clutch friction elements begin to touch. 3 . The method of claim 2 , where the start of closing pressure is based on an engine cranking torque. 4 . The method of claim 2 , further comprising ramping an increase in driveline disconnect clutch working fluid pressure after providing the start of closing pressure. 5 . The method of claim 4 , where a ramp rate of ramping the increase in driveline disconnect clutch working fluid pressure is based on the rate of change in accelerator pedal position. 6 . The method of claim 4 , where a ramp rate of ramping the increase in driveline disconnect clutch working fluid pressure is further based on accelerator pedal position. 7 - 14 . (canceled) 15 . A driveline system, comprising: an engine; an electric machine; a driveline disconnect clutch selectively coupling the engine and the electric machine; and a controller including executable instructions stored in non-transitory memory for adjusting a pressure of a working fluid supplied to the driveline disconnect clutch based on an engine cranking torque and a rate of change in accelerator pedal position. 16 . The driveline system of claim 15 , further comprising adjusting the pressure of the working fluid in response to available DISG torque. 17 . The driveline system of claim 15 , further comprising adjusting the pressure of the working fluid in response to barometric pressure. 18 . The driveline system of claim 15 , further comprising adjusting the pressure of the working fluid in response to engine friction. 19 . The driveline system of claim 15 , further comprising additional instructions to decrease the pressure of the working fluid in response to a number of engine combustion events since engine stop. 20 . The driveline system of claim 15 , further comprising additional instructions to decrease the pressure of the working fluid in response to engine speed exceeding a threshold speed. 21 - 25 . (canceled)
Assignees
Inventors
Classifications
including control of combustion engines · CPC title
Ambient conditions, e.g. wind or rain · CPC title
Accelerator pedal position · CPC title
Speed · CPC title
Electric machine connected or connectable to gearbox input shaft · CPC title
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- What does patent US2018119758A1 cover?
- Systems and methods for improving operation of a driveline disconnect clutch for a hybrid vehicle shifting are presented. In one example, pressure of a working fluid supplied to the driveline disconnect clutch is adjusted in response to a rate of change in accelerator pedal position. Further, pressure of the working fluid may be decreased responsive to selected operating conditions.
- Who is the assignee on this patent?
- Ford Global Tech Llc
- What technology area does this patent fall under?
- Primary CPC classification F16D48/066. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Thu May 03 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).