Misfire detecting device of multicylinder internal combustion engine
US5442955A · kind A · utility
13Cited by
4References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1994 |
| Grant date | Aug 22, 1995 |
| Priority date | — |
| Expiry date | Apr 12, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/1015
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A misfiring detecting device comprising a sensor for detecting the angular velocity of the crankshaft. The elapsed time required for the crankshaft to rotate by a certain crank angle is detected at the time of combustion at each cylinder. The difference .DELTA.T.sub.n (=T.sub.n -T.sub.n-2) of the elapsed time T between cylinders with explosion strokes one interval apart is found and it is judged that a misfire has occurred when the difference .DELTA.T.sub.n has exceeded a set value K.sub.1 and also the pattern of change of the elapsed time (.DELTA.TC) has become the pattern of change of the time of a misfire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.