摘要:
Dans un procédé et un dispositif d'excitation d'un consommateur électromagnétique (1) monté en série avec un moyen de commutation (2), la tension appliquée au moyen de commutation (2) est amenée à un comparateur de tensions (12) et y est comparée avec la tension d'une source de tension de référence (13). En fonction de cette comparaison de tensions se produit à la connexion de sortie du comparateur de tensions (12) un signal de sortie servant à la commutation d'un dispositif coupe-circuit (4).
摘要:
A method is disclosed which allows a transition zone ÜB of the characteristic line 25 of an injection valve to be individually detected and continuously adapted such that a monotonic characteristic line can be formed that allows the injection valve to meter fuel with great accuracy.
摘要:
The invention relates to a method for operating an electromagnetic actuator, in particular of a fuel injection valve of an internal combustion engine of a motor vehicle, in which method the electromagnetic actuator is activated during an activation process in order to influence an operating state of the actuator. According to the invention, a state, which is present in particular at the start of the activation process, of a magnetic circuit (11) of the electromagnetic actuator is taken into consideration in the activation of the electromagnetic actuator.
摘要:
The invention relates to a method for determining the opening delay time of a magnetic valve. The invention further relates to a control unit for actuating at least one magnetic valve in an injection system of an internal combustion engine. In order to determine a current opening delay time of a magnetic valve, it is proposed to execute an actuation of the magnetic valve during a measuring phase, and to determine a difference from the beginning of the actuation and the opening time of the magnetic valve. In order to determine the opening time, an actuation of the magnetic valve is carried out during a measuring phase. During the actuation, the actuating current is observed. If a change in the actuating current is detected, it is assumed that the opening time has been reached. Preferably, an at least approximately constant actuating voltage is applied to the magnetic coil during the measuring phase. Specifically, the predeterminable change is a flattening of the actuating current, which preferably is determined by determining a minimum of the differentiated power signal.
摘要:
The invention relates to a method for operating a solenoid valve (10), particularly an injection valve of a fuel injection system, wherein the solenoid valve (10) comprises a valve element having a valve needle (20) and an armature (14) displaceable by means of an electromagnet (13), wherein an opening motion of the armature (14) is limited by a lift stop (18), comprising the following steps: (a) determining an actuation start of the electromagnet (13); (b) determining an end of a motion (52) (impact information) of the valve element at the end of the opening motion; (c) determining a lift delay (32) using the determined actuation start (38), the determined end of motion (52), and a previously determined time of motion (56) of the valve element.
摘要:
The invention relates to a method for operation of a fuel injection system wherein fuel enters at least one combustion chamber of the internal combustion engine from an electromagnetically actuated injection valve (1) and wherein the movement of a valve element (3) influences said injection valve (1) at least temporarily by an electromagnetic brake impulse (16). A closing delay time of said injection valve (1) or a corresponding measurement is determined and the determined closing delay time or the corresponding measurement is used to determine at least one parameter of said brake impulse (16).