Pre-lubrication and skip fire operations during engine cranking
US11203954B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2020 |
| Grant date | Dec 21, 2021 |
| Priority date | — |
| Expiry date | Jul 13, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system includes a valve actuation system, a pre-lubrication pump coupled to a lubrication circuit and configured to provide oil to the valve actuation system, a catalyst for receiving and treating exhaust gasses, and a controller. The controller is configured to identify an engine start request and determine whether the catalyst temperature is below a first threshold value. In response to determining that the catalyst temperature is below the first threshold value, the controller actuates the pre-lubrication pump to direct lubricant to the valve actuation system, controls the valve actuation system to deactivate at least one cylinder of an engine, and, subsequent to deactivating the at least one cylinder of the engine, cranks the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.