Malfunction diagnostic apparatus and malfunction diagnostic method for combustion improvement device
US7654133B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2007 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Nov 30, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A malfunction diagnostic apparatus for a combustion improvement device that is disposed in an intake passage connected to each of combustion chambers in an internal combustion engine to improve a combustion state, includes a detector that detects an average crank angular acceleration or a correlated value correlated with the average crank angular acceleration in each of cylinders in the internal combustion engine; an operating state detector that detects a current operating state of the combustion improvement device; and a malfunction determination device that determines whether a malfunction occurs in the combustion improvement device for each of the cylinders, based on the average crank angular acceleration or the correlated value and the current operating state of the combustion improvement device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.