About 82 results
https://drivepatents.com/patents/1073941 · 21 Sep 2005
The method involves forming a mean value of a measurement variable of all actuators of a given type in dependence of a parameter. A deviation dependent on the parameter is formed. A lower and upper limit values dependent on the deviation and the mean value...
https://drivepatents.com/patents/1074086 · 14 Sep 2005
The invention relates to a power supply arrangement (60,70,80) for an injector drive circuit (12) configured to operate in an energy recovery mode. The power supply arrangement receives an input voltage and includes: voltage boost means (24,124) for increa...
https://drivepatents.com/patents/1076121 · 6 Jul 2005
The method involves detecting a first maximum voltage set after charging the piezoelectric actuator and a second constant voltage just before discharging the piezoelectric actuator for different charging currents applied in the same time interval, evaluati...
https://drivepatents.com/patents/1076810 · 15 Jun 2005
The method involves loading the actuator and measuring the actuator voltage (U) before and/or after loading, determining the time of at least one turning point (G1,G2) in the time profile of the measured actuator voltage and determining an injection parame...
https://drivepatents.com/patents/1078054 · 4 May 2005
A device for controlling several ultrasonic piezo-electric drivers driven electronically from a control computer and a source of continuous voltage, incorporates an electronic system for driving some drivers fed by the continuous voltage source and deliver...
https://drivepatents.com/patents/1078214 · 27 Apr 2005
A method for driving a laminated piezoelectric device (1, 2A-2D) is provided. The device (1, 2A-2D) includes a piezoelectric stack (10) and a pair of side electrodes (151). The piezoelectric stack (10) includes a plurality of piezoelectric layers (11) and ...
https://drivepatents.com/patents/1078620 · 13 Apr 2005
There is described a voltage booster circuit (1) for powering a piezoelectric actuator of an injector, and having a first and a second input terminal (2a, 2b) supplied with an input voltage (Vi); a first and a second output terminal (3a, 3b) supplying an o...
https://drivepatents.com/patents/1078890 · 30 Mar 2005
A drive circuit (20a,20b) for an injector arrangement having at least one piezeoelectric injector (12a,12b) is described. The drive circuit comprises: a first charge storage means (C2) for operative connection with the injector (12a,12b) during a dischargi...
https://drivepatents.com/patents/1078893 · 30 Mar 2005
Detected as consumed in total by all actuators (AA) in an internal combustion engine, average electric power (P) is compared with a preset desired power (Psoll) that represents a nominal power from a control device to the AA. Electric power consumed in fut...
https://drivepatents.com/patents/1078868 · 30 Mar 2005
A valve drive mechanism is designed as a piezoelectric actuator. At a preset time, a valve element (VE) moves into a valve seating (VS) from a position away from a VS. A signal characterizes a piezoelectric voltage (VINJ) and its branching-off is determine...