Method and device for detecting misfires of the air/fuel mixture feeding an internal combustion engine propelling a motor vehicle and their applications
US5452699A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 13, 1994 |
| Grant date | Sep 26, 1995 |
| Priority date | — |
| Expiry date | May 13, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/1015
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The dynamic behaviour of the engine (1) is monitored and the existence of misfires is deduced from the detection of irregularities in this behaviour induced by these misses. According to the invention, forces transmitted between the engine (1) and the chassis (2) of the vehicle in which it is installed are sensed, the amplitude of these forces is compared to a predetermined threshold value, from the exceeding of this threshold the application to the engine of external forces is deduced and the detection (8) of possible misfires is inhibited when these external forces are applied to the engine (1) when the load of the latter is lower than a predetermined load value. Application is to the protection of a catalytic converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.