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1. WO1996005427 - METHOD FOR IGNITION TIMING CONTROL IN COMBUSTION ENGINES

Publication Number WO/1996/005427
Publication Date 22.02.1996
International Application No. PCT/SE1995/000912
International Filing Date 08.08.1995
IPC
F02D 35/02 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
35Non-electrical control of engines, dependent on conditions exterior or interior to engines, not otherwise provided for
02on interior conditions
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
F02P 5/153 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
PIGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
5Advancing or retarding electric ignition spark; Control therefor
04automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
145using electrical means
15Digital data processing
153dependent on combustion pressure
F02P 17/12 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
PIGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
17Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
12Testing characteristics of the spark, ignition voltage or current
CPC
F02D 2041/286
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
24characterised by the use of digital means
26using computer, e.g. microprocessor
28Interface circuits
286comprising means for signal processing
F02D 2200/1004
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
1002Output torque
1004Estimation of the output torque
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 35/021
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
35Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
02on interior conditions
021using an ionic current sensor
F02D 41/28
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
24characterised by the use of digital means
26using computer, e.g. microprocessor
28Interface circuits
F02P 17/12
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
PIGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
17Testing of ignition installations, e.g. in combination with adjusting
12Testing characteristics of the spark, ignition voltage or current
Applicants
  • MECEL AB [SE/SE]; P.O. Box 73 S-662 22 Åmål, SE (AllExceptUS)
  • JOHANSSON, Hans [SE/SE]; SE (UsOnly)
  • NYTOMT, Jan [SE/SE]; SE (UsOnly)
Inventors
  • JOHANSSON, Hans; SE
  • NYTOMT, Jan; SE
Agents
  • FURHEM, Hans; Mecel AB P.O. Box 73 S-662 22 Åmål, SE
Priority Data
9402686-111.08.1994SE
Publication Language English (EN)
Filing Language Swedish (SV)
Designated States
Title
(EN) METHOD FOR IGNITION TIMING CONTROL IN COMBUSTION ENGINES
(FR) PROCEDE DE COMMANDE DE REGLAGE D'ALLUMAGE DANS LES MOTEURS A COMBUSTION
Abstract
(EN)
The invention relates to an improved method applied in combustion engines, which method uses the ionisation current in the combustion chamber in order to extract a parameter representative for the pressure in the cylinder, which parameter is used for controlling the ignition timing whithin an extended range of the load and speed range. Detection of the peak pressure position by detecting when the first order derivative of the ionisation current changes sign exhibits deficiencies at certain operating cases such as low loads and speeds, due to that the first order derivative change sign a number of times during the post-ionisation phase. The inventive method is based on an integration of a parameter dependent of the ionisation current. In a first embodiment is the mass centre position of the integral calculated, which mass centre position is used as a position corresponding to the peak pressure position. The ignition timing is adjusted in such a manner that the mass centre position, and hence the peak pressure position, strives to obtain a predetermined target value. In a second embodiment an integrated value is calculated, which takes into account the mechanics of the combustion engine in such a way that the integrated value corresponds to a value representative of the torque transmitted to the crankshaft. By optimising the integrated value, the torque transmitted to the crankshaft could be optimised as well, obtaining an optimal usage of the fuel-air mixture supplied.
(FR)
Procédé perfectionné appliqué dans les moteurs à combustion, utilisant le courant d'ionisation dans la chambre de combustion afin d'extraire un paramètre représentant la pression dans le cylindre, ce paramètre étant utilisé pour réguler l'allumage dans une plage étendue de charges et de vitesses. La méthode consistant à détecter la position à la pression de crête grâce à la détection du changement de signe de la dérivée de premier ordre du courant d'ionisation présente des défauts dans certains cas, comme lors du fonctionnement à faible charge et à faible vitesse, étant donné que la dérivée de premier ordre change de signe un certain nombre de fois pendant la phase de post-ionisation. Le procédé ci-décrit se fonde sur l'intégration d'un paramètre en fonction du courant d'ionisation. Dans une première forme d'exécution, on calcule la position du centre de masse de l'intégrale, cette position étant utilisée comme position correspondant à la position à la pression de crête. Le réglage de l'allumage se fait de manière que la position du centre de masse, et partant la position à la pression de crête, tende à une valeur cible prédéterminée. Dans une deuxième forme d'exécution, on calcule une valeur intégrée prenant en compte la mécanique du moteur à combustion, de manière que la valeur intégrée corresponde à une valeur représentative du couple transmis au vilebrequin. L'optimisation de la valeur intégrée permet d'optimiser également le couple transmis au vilebrequin, ce qui se traduit par une utilisation optimale du mélange air-carburant fourni.
Also published as
DE19581041
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