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1. WO2007147484 - METHOD FOR DETECTING A MISFIRE AND CORRESPONDING DEVICE

Publication Number WO/2007/147484
Publication Date 27.12.2007
International Application No. PCT/EP2007/004933
International Filing Date 04.06.2007
IPC
F02D 41/14 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
02Circuit arrangements for generating control signals
14Introducing closed-loop corrections
G01M 15/11 2006.01
GPHYSICS
01MEASURING; TESTING
MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
15Testing of engines
04Testing internal-combustion engines
11by detecting misfire
CPC
F02D 2200/1015
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
2200Input parameters for engine control
02the parameters being related to the engine
10Parameters related to the engine output, e.g. engine torque or engine speed
1015Engines misfires
F02D 41/1498
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
02Circuit arrangements for generating control signals
14Introducing closed-loop corrections
1497With detection of the mechanical response of the engine
1498measuring engine roughness
G01M 15/11
GPHYSICS
01MEASURING; TESTING
MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
15Testing of engines
04Testing internal-combustion engines
11by detecting misfire
Applicants
  • CONTINENTAL AUTOMOTIVE FRANCE [FR]/[FR] (AllExceptUS)
  • GALTIER, Frédéric [FR]/[FR] (UsOnly)
  • ROUSSEL, Damien [FR]/[FR] (UsOnly)
Inventors
  • GALTIER, Frédéric
  • ROUSSEL, Damien
Common Representative
  • CONTINENTAL AUTOMOTIVE FRANCE
Priority Data
060552621.06.2006FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) METHOD FOR DETECTING A MISFIRE AND CORRESPONDING DEVICE
(FR) PROCEDE DE DETECTION DE RATE D'ALLUMAGE ET DISPOSITIF CORRESPONDANT
Abstract
(EN)
The invention relates to a method for detecting a misfire in an internal combustion engine provided with at least two cylinders and one crankshaft, this method involving the steps consisting in: a. producing a measurement signal connected to the crankshaft travel time by supplying a succession of instantaneous values each corresponding to the difference between two successive segment times, each of these segment times corresponding to the space of time separating two characteristic instants of the movement of the pistons in two successive cylinders in the firing order, b. comparing the value of the measurement signal with a threshold value, and c. generating a signal representative of a misfire if the value of the measurement signal crosses the threshold value, the said measurement signal having, per cylinder, a mean value that is offset from a reference mean value, the method also involving a step that consists, per cylinder, in reducing this offset, the said method being characterized in that the reducing step is performed by a high-pass filtering operation on the measurement signal. The invention also covers the associated device.
(FR)
L'invention concerne un procédé de détection de raté d'allumage dans un moteur à combustion interne doté d'au moins deux cylindres et d'un vilebrequin, ce procédé comprenant les étapes consistant à : a. Elaborer un signal de mesure lié au temps de parcours du vilebrequin par la fourniture d'une succession de valeurs instantanées correspondant chacune à la différence entre deux temps de segment successifs, chacun de ces temps de segment correspondant à l'intervalle de temps qui sépare deux instants caractéristiques du mouvement des pistons dans deux cylindres successifs dans l'ordre d'allumage, b. Comparer la valeur du signal de mesure à une valeur seuil, et c. Générer un signal représentatif d'un raté d'allumage si la valeur du signal de mesure franchit la valeur seuil, ledit signal de mesure présentant, par cylindre, une valeur moyenne décalée par rapport à une valeur moyenne de référence, le procédé comprenant en outre une étape consistant à réduire, par cylindre, ce décalage, ledit procédé étant caractérisé en ce que l'étape de réduction est réalisée par une opération de filtrage passe haut du signal de mesure. L'invention couvre également le dispositif associé.
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