Abstract: A method for detecting a closing moment of a valve having a coil drive includes impressing an electrical voltage in the exciter coil to generate an exciter current through the coil, which attracts the movable armature and lifts the valve element off its valve seat. After the exciter current decays to zero, the voltage profile at the exciter coil is sampled and read out over time in the form of time value/voltage value pairs. The detected voltage values and time valves are transformed by the formation of a logarithm to form a transformed function. The transformed function is subsequently derived numerically with the formation of a derivation function. A transformed time value corresponding to the valve closing moment is detected based on the derivation function of a predetermined threshold value S being undershot, and the closing moment is calculated therefrom by inverse transformation.

Abstract: In a method and a device for the calibration of internal combustion engines, in each fuel injector, at least one actuator element (1) may be activated by an electric signal interacts with at least one injection valve (3) having an injection rate for the supply of fuel to a combustion chamber (5) via injection holes, and in the case of a flow characteristic curve (12, 23, 35) of the fuel flowing through the injection holes deviating from a target characteristic curve (11, 22, 34) in a flow-time diagram, a signal characteristic curve (14a, 27, 42) of the electric signal applied to the actuator element (1) is altered in a voltage-time diagram relative to a target characteristic curve (13, 26, 41) by a controller.

Abstract: A method for detecting a closing moment of a valve having a coil drive includes impressing an electrical voltage in the exciter coil to generate an exciter current through the coil, which attracts the movable armature and lifts the valve element off its valve seat. After the exciter current decays to zero, the voltage profile at the exciter coil is sampled and read out over time in the form of time value/voltage value pairs. The detected voltage values and time valves are transformed by the formation of a logarithm to form a transformed function. The transformed function is subsequently derived numerically with the formation of a derivation function. A transformed time value corresponding to the valve closing moment is detected based on the derivation function of a predetermined threshold value S being undershot, and the closing moment is calculated therefrom by inverse transformation.

Abstract: In a method for reading and/or storing injector-specific data for controlling an injection system of an internal combustion engine, an injector is charged by a control unit according to a predeterminable voltage curve and, depending on the case, is discharged directly by the control unit or by a power element located on a data storage medium and the voltage is measured by the control unit and by the data storage medium. Dependent upon a predeterminable voltage curve, a predeterminable amount of data is stored or read on a memory unit of the data storage medium.

Abstract: In a method for reading and/or storing injector-specific data for controlling an injection system of an internal combustion engine, an injector is charged by a control unit according to a predeterminable voltage curve and, depending on the case, is discharged directly by the control unit or by a power element located on a data storage medium and the voltage is measured by the control unit and by the data storage medium. Dependent upon a predeterminable voltage curve, a predeterminable amount of data is stored or read on a memory unit of the data storage medium.

Abstract: In a method and a device for the calibration of internal combustion engines, in each fuel injector, at least one actuator element (1) may be activated by an electric signal interacts with at least one injection valve (3) having an injection rate for the supply of fuel to a combustion chamber (5) via injection holes, and in the case of a flow characteristic curve (12, 23, 35) of the fuel flowing through the injection holes deviating from a target characteristic curve (11, 22, 34) in a flow-time diagram, a signal characteristic curve (14a, 27, 42) of the electric signal applied to the actuator element (1) is altered in a voltage-time diagram relative to a target characteristic curve (13, 26, 41) by a controller.