Ignition range detector for internal combustion engines
US4438647A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1982 |
| Grant date | Mar 27, 1984 |
| Priority date | — |
| Expiry date | Jan 5, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M15/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ignition range detector for an internal combustion engine is disclosed, in which at each combustion of the internal combustion engine, a pressure signal of a pressure sensor for detecting the pressure in a cylinder is integrated by a signal associated with the crank angle to produce an area S.sub.1 +S.sub.2 presenting the combustion state. At the same time, the pressure signal for a hypothetical case of misfire under the same condition is integrated to produce an area S.sub.1. It is decided whether the ratio (S.sub.1 +S.sub.2)/S.sub.1 is higher than a predetermined value .alpha. or not thereby to detect an ignition range always stably regardless of the operating conditions of the internal combustion engine including the load thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.