About 82 results
https://drivepatents.com/patents/1088876 · 17 Mar 2004
The control device (1) has an injector (3) having a transducer adapted to be displaced on the reception of an electric command. It includes a resonant circuit formed by an inductance (14) and a capacitor of a piezo-electric injector cell, for activating th...
https://drivepatents.com/patents/1088872 · 17 Mar 2004
The device (1) is for controlling an injector (3) having a transducer, adapted to be displaced, on receiving an electric command. It includes a cutting stage (7) having a switch (15) and units to aid the switching of this switch, and a selection stage (9) ...
https://drivepatents.com/patents/1089206 · 3 Mar 2004
The method involves monitoring the variation of the piezoelectric actuator (24) voltage at least in a closed position of the closure element (42) at which the actuator voltage is greater then null and drawing a conclusion re a leak in the coupler region fr...
https://drivepatents.com/patents/1090227 · 21 Jan 2004
The system makes it possible to control at least one piezoelectric actuator (PA) having a capacitive impedance and includes a source of voltage (VSS), a control circuit branch (5) in parallel with the source (VSS), in which the actuator (PA) is connected i...
https://drivepatents.com/patents/1090649 · 2 Jan 2004
Fuel injected by injection valve into engine combustion chamber. The injection valve nozzle needle is displaced by piezoelectric actuator (A) applying voltage for needle displacement and fuel injection. A first voltage (U1) is applied to the actuator, with...
https://drivepatents.com/patents/1091561 · 26 Nov 2003
The device has a first measurement resistance (1) with first and second voltage tappings and a measurement element (3) with a signal input and a reference input, whereby the signal input of the measurement element is connected to the first voltage tapping ...
https://drivepatents.com/patents/1095872 · 21 May 2003
A redundant reset circuit (14) is included. This can switch off the piezoelectric final stage (16), and discharge the piezoelectric components (Pxxx) without re-charging them.
https://drivepatents.com/patents/1096004 · 14 May 2003
To transfer an excursion for a piezoelectric element (PE) (10) onto an actuator, a control valve (CV) (42) is used that moves the actuator. To transfer an excursion for the PE onto the CV, a hydraulic coupler is inserted. Adjusting movement in the hydrauli...
https://drivepatents.com/patents/1096001 · 14 May 2003
Electric charge carriers are transported to a piezoelectric element (10) by a supply voltage (14) for a source (16) of direct current and vice versa in order to transfer a flexible excursion for the piezoelectric element onto an actuator (18). Relying on t...
https://drivepatents.com/patents/1095998 · 14 May 2003
A multiplier (30) uses a temperature (16) for a piezoelectric element (10) to adjust a voltage set-point (14). An adjusted voltage set-point (28) to be calculated is formed from a voltage set-point (14) through multiplication with an adjustment value/multi...