Apparatus and method for estimating residual gas amount of internal combustion engine, and apparatus and method for controlling intake air amount of internal combustion engine using estimated residual gas amount
US6999864B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2003 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Jul 14, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In an internal combustion engine provided with a variable valve mechanism that variably controls at least an operating characteristic (valve lift amount and the like) of an intake valve, a valve opening area AWm at a valve overlap time is calculated based on a valve lift amount (VCS-ANGL) and opening timing IVO of the intake valve, and a spit-back gas amount Wm at the valve overlap time is calculated based on the valve opening area AWm. On the other hand, a volume flow ratio (basic actual engine volume flow ratio) RQH0VEL1 in the intake valve, equivalent to an actual intake air amount of the engine, is calculated based on the valve lift amount and closing timing of the intake valve, and a basic residual gas amount Wcyl is calculated based on the basic actual engine volume flow ratio RQH0VEL1. Then, a resultant obtained by adding the spit-back gas amount Wm and the basic residual gas amount Wcyl, is set as a total residual gas amount of the engine. Further, in the case where an intake air amount control is performed by the variable valve mechanism, a target valve operating characteristic is set based on a target intake air amount which is set according to an operating condition of t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.