Combustion-assisted engine start/stop operation with cylinder/valve deactivation
US6935295B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 24, 2003 |
| Grant date | Aug 30, 2005 |
| Priority date | — |
| Expiry date | Sep 24, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02N11/0814
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for enabling combustion-assisted engine starting includes adjusting a throttle valve to provide an air flow rate to an engine of a vehicle that is sufficient to create starting torque. Fuel that is sufficient to create starting torque is injected into a cylinder of the engine during an intake stroke of the cylinder. A spark plug of the cylinder is disabled. An intake and exhaust valve of the cylinder are disabled. The engine is deactivated. A method for activating the engine includes enabling the spark plug. A piston of the cylinder is positioned between a TDC position of a compression stroke and a BDC position of an expansion stroke or between a TDC position of an exhaust stroke and a BDC position of an intake stroke. A fuel/air charge that is sufficient to create starting torque is ignited in the cylinder. The intake and exhaust valve are activated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.