Exhaust pressure pulse management method to raise exhaust temperature and enthalpy in internal combustion engines
US11933233B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 2023 |
| Grant date | Mar 19, 2024 |
| Priority date | — |
| Expiry date | Mar 29, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine includes multiple cylinders having at least one deactivated cylinder and at least one activated cylinder, multiple intake valves, wherein each intake valve is positioned in an intake port of each of the cylinders, multiple exhaust valves, wherein each exhaust valve is positioned in an exhaust port of each of the cylinders, and an exhaust pulse valve positioned along an exhaust main passage fluidly connected between a turbine inlet to a turbocharger and the exhaust valves. Methods are disclosed that include deactivating the deactivated cylinders and operating the activated cylinders, while the exhaust pulse valve is actuated by fully opening the exhaust pulse valve when at least one of the multiple exhaust valves to the at least one activated cylinder is open and fully closing the exhaust pulse valve when each of the multiple exhaust valves to the at least one activated cylinder is closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.