Intake system failure detecting device and method for engines
US6752128B2 · kind B2 · utility
6Cited by
0References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 2003 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | May 19, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0404
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A throttle opening range is divided into regions corresponding to the opening positions, and a deviation between an actual intake air suction state and a predetermined suction state provided for each of the divided regions is calculated. Intake system abnormality such as air cleaner clogging or intake pipe leakage is determined, if the deviation changes in a predetermined increasing or decreasing direction over a plurality of the divided regions. The air suction state may be represented by an intake pipe pressure or intake air flow quantity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.