Operating method for actuator with capacitive element used for fuel injector for automobile IC engine with function monitoring of parallel resistor

• Main Authors: RUEGER, JOHANNES-JOERG, HUBER, ANDREAS, KNICKER, RAINER, SCHULZ, UDO
• Format: Patent
• Language: English; German
• Published: 26.02.2004
• Edition: 7
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; ELECTRICITY; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

The operating method has an ohmic resistor connected in parallel across the capacitive element of the actuator e.g. a piezoactuator (28), the value of the ohmic resistor used for determining the timing point, the correct function of the ohmic resistor monitored for provision of a fault signal by monitoring its value during a start phase of a control device (24) for the capacitive element. Also included are Independent claims for the following: (a) a computer program for operation of an actuator with a capacitive element; (b) a control and/or regulation device for operating an actuator with a capacitive element; (c) an IC engine with at least one fuel injector having an actuator with a capacitive element and a parallel ohmic resistor Ein Steller umfasst ein kapazitives Element, zu dem parallel ein ohmscher Widerstand geschaltet ist. Zu bestimmten Zeitpunkten wird der Wert des ohmschen Widerstands erfasst. Um die Betriebssicherheit beim Betrieb des Stellers zu erhöhen, wird die korrekte Funktion des ohmschen Widerstands überwacht und bei einer erkannten Fehlfunktion ein Fehlersignal ausgegeben.