Apparatus of diagnosing an internal combustion engine and a method of diagnosing of an internal combustion engine
US6457353B1 · kind B1 · utility
27Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2000 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Jan 11, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
By employing command value signals for controlling the opening timing of an exhaust valve or an intake valve and means for measuring flow rates of an intake air of a flow direction which flows through an intake manifold of an internal combustion engine, an air flow rate corresponding to the command value signal is measured. A valve mechanism includes the intake valve and the exhaust valve for each cylinder of the internal combustion engine and is controlled by a valve control means for controlling the valve mechanism. A failure diagnosis of an operating status of the valve mechanism can be performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.