Cylinder pressure estimation device of internal combustion engine
US8495909B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 2010 |
| Grant date | Jul 30, 2013 |
| Priority date | — |
| Expiry date | Feb 16, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A cylinder pressure estimation device calculates a plurality of candidate values of a possible cylinder pressure at an intake-valve-closing time, calculates a plurality of candidates of a possible movement of the cylinder pressure from the intake-valve-closing time to a post-intake-valve-closing time on the basis of the candidate values of the intake-valve-closing-time cylinder pressure, calculates a movement of the cylinder pressure detected by the cylinder pressure sensor from the intake-valve-closing time to the post-intake-valve-closing time; and calculates the candidates of the cylinder pressure movement with the detected cylinder pressure movement, determining the candidate of the cylinder pressure movement to be deemed to correspond to the detected cylinder pressure movement and determining the candidate value of the intake-valve-closing-time cylinder pressure used for calculating the determined candidate of the cylinder pressure movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.