Control system for internal combustion engine

F - Mech Eng,Light,Heat,Weapons – 02 – D

Patent

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F02D 41/18 (2006.01) F02D 13/02 (2006.01) F02D 15/02 (2006.01) F02D 45/00 (2006.01) F02P 5/15 (2006.01)

Patent

CA 2564880

A controller of an internal combustion engine capable of increasing the accuracies of fuel control and ignition timing control even when the reliability of a calculated intake air amount may be lowered and also enabling a reduction in manufacturing cost. In the controller, a first estimated intake amount is calculated according to a valve lift, a cam phase, and a compression ratio, a second estimated intake amount is calculated according to the flow of air detected by an air flow sensor, and when an estimated flow Gin_vt is within Gin_vt <= Ginl calculated based on an engine speed, the valve lift, the cam phase, and the compression ratio, a fuel injection amount is determined according to the first estimated intake amount, and when the estimated flow is within Gin2 <= Gin_vt, the fuel injection amount is determined according to the second estimated intake amount.

Un contrôleur d~un moteur à combustion interne susceptible d~augmenter les précisions du contrôle du combustible et du contrôle du réglage de l~allumage même lorsque la fiabilité d~une quantité calculée d~air d~admission peut être diminuée et permettant également une réduction du coût de fabrication. Dans le contrôleur, une première quantité d~admission estimée est calculée selon une levée de soupape, une phase de came, et un taux de compression, une deuxième quantité d~admission estimée est calculée selon le débit d~air détecté par un capteur de débit d~air, et lorsque un débit estimé Gin_vt se trouve dans la plage Gin_vt <= Ginl calculé sur la base d~une vitesse de moteur, la levée de soupape, la phase de came et le taux de compression, une quantité d'injection de combustible est déterminée selon la première quantité d~admission estimée, et lorsque le débit estimé se trouve dans la plage Gin2 <= Gin_vt, la quantité d'injection de combustible est déterminée selon la deuxième quantité d~admission estimée.

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