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1. (WO1998051922) METHOD FOR CLOSED-LOOP CONTROL OF INJECTION TIMING IN COMBUSTION ENGINES
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1998/051922 International Application No.: PCT/SE1998/000811
Publication Date: 19.11.1998 International Filing Date: 04.05.1998
IPC:
F02D 35/02 (2006.01) ,F02D 41/14 (2006.01) ,F02D 41/38 (2006.01) ,F02P 5/145 (2006.01) ,F02P 17/12 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
D
CONTROLLING COMBUSTION ENGINES
35
Non-electrical control of engines, dependent on conditions exterior or interior to engines, not otherwise provided for
02
on interior conditions
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
D
CONTROLLING COMBUSTION ENGINES
41
Electrical control of supply of combustible mixture or its constituents
02
Circuit arrangements for generating control signals
14
Introducing closed-loop corrections
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
D
CONTROLLING COMBUSTION ENGINES
41
Electrical control of supply of combustible mixture or its constituents
30
Controlling fuel injection
38
of the high pressure type
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
P
IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
5
Advancing or retarding electric ignition spark; Control therefor
04
automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
145
using electrical means
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
P
IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
17
Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
12
Testing characteristics of the spark, ignition voltage or current
Applicants:
RASK, Patrik [SE/SE]; SE (UsOnly)
MECEL AB [SE/SE]; P.O. Box 73 S-662 22 Åmål, SE (AllExceptUS)
Inventors:
RASK, Patrik; SE
Agent:
FURHEM, Hans; Mecel AB P.O. Box 73 S-662 22 Åmål, SE
Priority Data:
9701780-012.05.1997SE
Title (EN) METHOD FOR CLOSED-LOOP CONTROL OF INJECTION TIMING IN COMBUSTION ENGINES
(FR) METHODE RELATIVE A LA COMMANDE EN BOUCLE FERMEE DE L'AVANCE A L'INJECTION DANS DES MOTEURS A COMBUSTION
Abstract:
(EN) The invention relates to a method for closed-loop control of the positioning of a predetermined fuel amount in the working cycle of a combustion engine of the Otto-type. The predetermined amount of fuel is supplied to the combustion chamber via an injector and the ignition of the air-fuel mixture is initiated after the fuel having been supplied by using a spark plug arranged in the combustion chamber. With a biased measuring gap arranged in the combustion chamber, could a measuring voltage UION be obtained which corresponds to the degree of ionisation during the flame ionisation phase. A parameter, dUION/dt, characteristic for the basic frequency in the measuring voltage during the flame ionisation phase is detected, which parameter could be used in order to indicate if an initiated correction of the injection timing is correct if the basic frequency increases, and vice versa indicates an incorrect correction of the injection timing if the basic frequency decreases. Preferably the basic frequency is detected by derivation of the measuring voltage during the period A, B, C or D, said derivation initiated by reference to time t or crankshaft angle VC, i.e. dUION/dt or dUION/dVC respectively.
(FR) L'invention a trait à une méthode relative à la commande en boucle fermée du placement d'une quantité prédéterminée de carburant dans le cycle de travail d'un moteur à combustion du type Otto. Cette quantité prédéterminée de carburant est amenée à la chambre de combustion par un injecteur et c'est une bougie, située dans la chambre de combustion, qui, à la suite de l'alimentation en carburant, procède à l'allumage du mélange air-carburant. Grâce à une tension de polarisation appliquée à l'espace séparant les électrodes, espace où s'effectue une mesure, il est possible d'obtenir une tension de mesure UION correspondant à un degré d'ionisation durant la phase d'ionisation de flamme. Un paramètre dUION /dt, caractéristique de la fréquence de base dans la tension de mesure durant la phase d'ionisation de flamme, est détecté, lequel paramètre indique que la correction apportée à l'avance à l'injection est adaptée si la fréquence de base augmente et, à l'inverse, que cette correction est mal venue si la fréquence de base diminue. La fréquence de base est détectée, de préférence, par dérivation de la tension de mesure durant une période donnée, A, B, C ou D, cette dérivation étant établie par référence au temps t ou à l'angle VC du vilebrequin, c'est à dire dUION/dt ou dUION/dVC, respectivement.
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Designated States: DE, US
Publication Language: English (EN)
Filing Language: Swedish (SV)