System for improving engine performance and reducing emissions

Details System for improving engine performance and reducing emissions System for improving engine performance and reducing emissions

F - Mech Eng,Light,Heat,Weapons

02

D

F02D 41/34 (2006.01) F02D 41/26 (2006.01)

Patent

CA 2493760

A method of correcting engine performance in response to assembly deviations includes the steps of measuring the physical characteristics of each cylinder of the engine, and storing the resulting data in the associated ECM. The engine is then operated in accordance with the stored data. The physical characteristics that are measured include, inter alia, a distance of axial displacement of each piston within its associated cylindrical bore; a timing characteristic of the camshaft; a timing of a fuel injection interval; the rate of fuel flow as a function of crankshaft angle of rotation, and a timing characteristic of the crankshaft. Some of the operating parameters that are controlled during engine operation in response to the data stored in the ECM include, inter alia, the air:fuel ratio and the timing of a fuel injection interval for each piston. These corrections result in increased power, decreased emissions, better mileage, a smoother running engine, and less costly components.

L'invention porte sur un procédé de correction des performances d'un moteur ayant subi des "déviations" au montage consistant: à mesurer les caractéristiques physiques de chaque cylindre; à stocker les données recueillies dans le module électronique de commande du moteur associé; puis à faire fonctionner le moteur en prenant en compte les données stockées. Les caractéristiques physiques mesurées comprennent notamment: la course de chaque piston dans son cylindre, le calage de l'arbre à came, la durée des injections de carburants, le débit de carburant en fonction de l'angle de rotation du vilebrequin, et le calage du vilebrequin. Les paramètres de fonctionnement, réglés pendant la marche du moteur en fonction des données stockées dans le module électronique de commande, sont notamment la richesse du mélange et la durée des injections de carburants pour chaque piston. Ces corrections se traduisent par: une augmentation de la puissance, une réduction des émissions, un accroissement du kilométrage, une régularité accrue du moteur, et des composants moins onéreux.

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