Process and device for determining the parameters of the fuel injectors of an internal combustion engine
First Claim
1. A process for determining a specific parameter of each fuel injector in an injector device of a multi-cylinder diesel engine having pre-injection with electronic control, comprising the steps of:
- establishing a curve of an instantaneous speed difference (DVi) of a crank shaft of the engine between a combustion top dead center point of a cylinder in question and a subsequent moment which is prior to a combustion top dead center point of a next subsequent cylinder to undergo combustion, the other functioning parameters being kept constant; and
determining an optimum value of said parameter with reference to an extreme point of said curve.
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Accused Products
Abstract
Specific parameters of each of the injectors of the injection device of a combustion engine, especially a device with pre-injection with electronic control of a diesel engine, are determined. The curve of the instantaneous speed difference (DVi) of the engine shaft between the time of transition to the combustion top dead center point of the cylinder in question and a subsequent time preceding the transition to the combustion top dead center point of the following cylinder is established as a function of the value of the parameter to be determined, the other parameters of functioning being kept constant. The optimum value of the parameter is determined which corresponds to an extremum of the curve.
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Citations
10 Claims
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1. A process for determining a specific parameter of each fuel injector in an injector device of a multi-cylinder diesel engine having pre-injection with electronic control, comprising the steps of:
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establishing a curve of an instantaneous speed difference (DVi) of a crank shaft of the engine between a combustion top dead center point of a cylinder in question and a subsequent moment which is prior to a combustion top dead center point of a next subsequent cylinder to undergo combustion, the other functioning parameters being kept constant; and determining an optimum value of said parameter with reference to an extreme point of said curve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device determining a specific parameter of each fuel injector in an injector device of a multi-cylinder diesel engine having pre-injection with an electronic control, which comprises:
a mechanism establishing a curve of an instantaneous speed difference (DVi) of a crank shaft of the engine between a combustion top dead center point of a cylinder in question and a subsequent moment which is prior to a combustion top dead center point of a next subsequent cylinder to undergo combustion, the other functioning parameters being kept constant, and determining an optimum value of said parameter with reference to an extreme point of said curve, said mechanism including a program which is integrated in an electronic control module of the injectors.
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10. A device determining a specific parameter of each fuel injector in an injector device of a multi-cylinder diesel engine having pre-injection with an electronic control module, which comprises:
a mechanism establishing a curve of an instantaneous speed difference (DVi) of a crank shaft of the engine between a combustion top dead center point of a cylinder in question and a subsequent moment which is prior to a combustion top dead center point of a next subsequent cylinder to undergo combustion, the other functioning parameters being kept constant, and determining an optimum value of said parameter with reference to an extreme point of said curve, the mechanism including a program integrated in a specific module which is connected to the electronic control module of the injectors.
Specification