Transmission controls to mitigate line pressure instability
US10746298B2 · kind B2 · utility
0Cited by
6References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 27, 2018 |
| Grant date | Aug 18, 2020 |
| Priority date | — |
| Expiry date | Nov 28, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/746
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Air ingestion into a transmission hydraulic system may lead to a number of issues. For example, the time to engage a hydraulically actuated parking mechanism may be excessive. As another example, the pump may not prime properly on a subsequent engine start. The air ingestion issue may be detected based on variability of transmission line pressure. When the line pressure variability exceeds a threshold, actions are taken to mitigate the potential issues.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.