Apparatus for diagnosing exhaust gas recirculation and method thereof
US8844343B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Jun 7, 2012 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Dec 6, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0406
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An exhaust gas recirculation diagnosis device may include an EGR module that supplies an intake manifold with exhaust gas from an exhaust manifold, a MAP (manifold absolute pressure) sensor that measures pressure of the intake manifold, and a control portion that controls the EGR module such that the flow rate of the exhaust gas that is supplied from the exhaust manifold to the intake manifold is controlled by stages and monitors the value of the MAP sensor in a fuel cut off condition to diagnose whether the EGR module is faulty. The exhaust gas recirculation diagnosis device uses MAP sensor to perform exhaust gas recirculation and to diagnose the fault of the exhaust gas recirculation device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.