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Method for adjusting clutch fill command pressure for a transmission using a lubrication compensator model
US10047856B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10047856-B2 |
| Application number | US-201615350514-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 14, 2016 |
| Priority date | Nov 14, 2016 |
| Publication date | Aug 14, 2018 |
| Grant date | Aug 14, 2018 |
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- Title
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Abstract
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A method for adjusting clutch fill command pressure for a transmission using a lubrication compensator model includes determining clutch fill line pressure and lubrication compensator model pressures, and adjusting the clutch fill command pressure to achieve the lubrication compensator model pressure based on the torque converter clutch status.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for adjusting clutch fill command pressure for a transmission using a lubrication compensator model comprising: determining clutch fill line pressure based on a torque request, transmission gear ratio, transfer gain, and pressure offset; determining a torque converter clutch connection status; determining lubrication compensator model pressures based on the clutch fill line pressure, engine speed, transmission temperature, and the torque converter clutch connection status; and adjusting the clutch fill command pressure based on the lubrication compensator model pressure. 2. The method of claim 1 further comprising selecting a predetermined lubrication compensation model pressure from a first array when the torque converter clutch status is locked. 3. The method of claim 1 further comprising selecting a predetermined lubrication compensation model pressure from a second array when the torque converter clutch status is unlocked. 4. The method of claim 1 further comprising using an accelerator pedal position sensor for determining the torque request. 5. The method of claim 1 further comprising using a crankshaft position sensor for determining the engine speed. 6. The method of claim 1 further comprising using a transmission temperature sensor for determining the transmission temperature. 7. The method of claim 1 wherein a transmission control module determines the torque converter clutch status. 8. The method of claim 1 wherein adjusting further comprises varying fluid flow rate with a fill solenoid to adjust the clutch fill command pressure. 9. A method for adjusting clutch fill command pressure for a transmission using a lubrication compensator model comprising: determining clutch fill line pressure based on a torque request, transmission gear ratio, transfer gain, and pressure offset; determining a torque converter clutch connection status; using a pressure transducer to determine initial lubrication compensator model pressures based on the clutch fill line pressure, engine speed, transmission temperature, and the torque converter clutch connection status wherein an initial lubrication compensator pressure is used for determining lubrication compensator model pressures based on the torque converter clutch status; and adjusting the clutch fill command pressure based on the lubrication compensator model pressure.
Assignees
Inventors
Classifications
Clutch slip · CPC title
Fluid coupling · CPC title
Pressure · CPC title
Engaged transmission ratio · CPC title
Temperature detection of any component of the control system · CPC title
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- What does patent US10047856B2 cover?
- A method for adjusting clutch fill command pressure for a transmission using a lubrication compensator model includes determining clutch fill line pressure and lubrication compensator model pressures, and adjusting the clutch fill command pressure to achieve the lubrication compensator model pressure based on the torque converter clutch status.
- Who is the assignee on this patent?
- Gm Global Tech Operations Llc
- What technology area does this patent fall under?
- Primary CPC classification F16D48/02. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Aug 14 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). 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).