Method and system for a variable displacement engine
US10221787B2 · kind B2 · utility
3Cited by
10References
19Claims
0Family size
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Key dates
| Filing date | Jun 16, 2017 |
| Grant date | Mar 5, 2019 |
| Priority date | — |
| Expiry date | Jun 16, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Methods and systems are provided for monitoring torque delivery in a variable displacement engine using air flow metered via a throttle body model. During conditions when air flow estimation can be inaccurate, such as at wide open throttle, an induction ratio applied to the engine is constrained to 1.0, even if the operator torque demand is low. VDE degradation is inferred based on the commanded induction ratio relative to an actual induction ratio estimated based on the torque delivery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.