Method for determining switch-off time of solenoid valve of rail-diesel engine, involves providing reference characteristic as simulation characteristic by solenoid valve simulation circuit that imitates reference measurement characteristic

• Main Author: DEGLER, TRAUGOTT
• Format: Patent
• Language: English; German
• Published: 31.03.2011
• Subjects: BASIC ELECTRIC ELEMENTS; BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; ELECTRICITY; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INDUCTANCES; LIGHTING; MAGNETS; MECHANICAL ENGINEERING; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS; WEAPONS

The method involves detecting solenoid valve-voltage characteristic, and comparing the detected solenoid valve-voltage characteristic with a reference voltage characteristic. The reference voltage characteristic is provided as simulation voltage characteristic by a solenoid valve simulation circuit that imitates a reference measurement voltage characteristic. The simulation voltage characteristic is assigned to the reference measurement voltage characteristic, where the simulation circuit is designed as a resistor capacitor (RC) element (130) with a capacitor (C11) and resistors (R11, R12). An independent claim is also included for a device for determining a switch-off time of a single solenoid valve. Bei einem Verfahren zur Bestimmung des Ausschaltzeitpunkts eines Magnetventils, insbesondere eines Magnetventils einer Einspritzeinrichtung einer Common Rail-Dieselbrennkraftmaschine, bei dem ein Magnetventil-Spannungsverlauf (331) erfasst und mit einem Referenz-Spannungsverlauf verglichen wird, wird vorgeschlagen, den Referenz-Spannungsverlauf als Simulations-Spannungsverlauf (333) durch eine das Magnetventil nachbildende Magnetventil-Simulationsschaltung (130) bereitzustellen. Eine entsprechende Vorrichtung ist ebenfalls Gegenstand der Erfindung.