Siemens Vdo Automotive Corporation

Franz Dietl

Holger Rukwid

Bennaceur Manssouri

Jae-Bong Koo

According to this method, a) a series of sparks is emitted into an engine cylinder ( ), filled with an air/fuel mixture to be ignited, at predetermined successive instants, b) one of the sparks that initiates the ignition of the mixture is identified, c) the difference separating the instant of emission of the spark from a predetermined ignition instant able to ensure that the engine supplies a predetermined mechanical power is evaluated, and d) the instant of opening of the fuel injector ( ) is corrected as a function of the difference, so as to initiate subsequent ignitions of the air/fuel mixture in the cylinder ( ) at the predetermined instant.

Method and device for adjusting opening time of a fuel injector for mounting a direct injection internal combustion engine

Method for correcting the signal ( ) of a sensor corresponding to the passage of teeth ( ) and of hollows ( ) of a target ( ) secured to an engine camshaft, characterized in that duration measurement is used to evaluate the angular values (&agr; ,&agr; ) of the alternations ( ) of the signal corresponding to the teeth and to the hollows, these angular values are compared with the mechanical angles (&ggr; ,&ggr; ) of the teeth and of the hollows, and from this a phase shift (&agr; ,&agr; ) of the rising ( ) and falling ( ) fronts of the signal with respect to the corresponding flanks ( ) of the teeth of the target is deduced. When said teeth and hollows extend over equal angular sectors, the phase shifts are calculated directly by comparing the duration measurements of two consecutive alternations ( ) of the signal.

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Wuppertal, Germany

Franz Dietl