Method and apparatus for detecting a malfunction in an intake pressure sensor of an engine
US5698780A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1996 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Sep 18, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0408
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for detecting a malfunction in an intake pressure sensor of an engine includes a first detecting unit which detects a flow rate of intake air of the engine. A second detecting unit detects an engine speed of the engine. An intake pressure estimating unit determines an intake-air specific flow rate from the intake-air flow rate and the engine speed and determines characteristic values for the intake-air specific flow rate, the characteristic values being representative of an allowable range of intake pressure of the engine for the intake-air specific flow rate. A malfunction determining unit detects whether a malfunction in the intake pressure sensor has occurred, by comparing a signal output by the intake pressure sensor with the characteristic values determined by the intake pressure estimating unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.