patent · US6840235
Internal exhaust gas recirculation amount estimation system of internal combustion engines
11 January 2005
Indexed reference — no copy held
This patent is cited by material in the archive, so it is indexed here by number, title and inventor. The archive holds no copy of its text.
Abstract
An internal exhaust gas recirculation amount estimation system calculates an in-cylinder temperature at an exhaust valve closure timing, an in-cylinder pressure at the exhaust valve closure timing, and a gas constant corresponding to a change in a composition of exhaust gas, based on an air-fuel mixture ratio. An exhaust valve closure timing in-cylinder residual gas amount is calculated based on at least the in-cylinder temperature, the in-cylinder pressure, and the gas const...
Provenance
- Collection
- Cited prior art
- Original PDF
- patentimages.storage.googleapis.com →
- Filed
- 2003-07-21
- Source
- Google Patents bibliographic record
- Granted
- 2005-01-11
- Inventors
- Takahisa Koseki; Youichi Oshimi; Hatsuo Nagaishi; Nissan Motor Co Ltd