About 82 results
https://drivepatents.com/patents/956953 · 14 Oct 2015
In a fuel injector including an actuator operated valve, said valve being located within a valve body, a method comprising determining the condition where, or the point when, there is or is not electrical continuity between two injector components adapted ...
https://drivepatents.com/patents/980942 · 11 Dec 2013
The arrangement (1) has a control unit (3) provided with a control signal for driving a piezoelectric actuator (2), where the control unit adapts a control signal based on detected operating temperature. A fuel injection valve (4) is provided with a nozzle...
https://drivepatents.com/patents/991606 · 24 Apr 2013
An electrical drive arrangement of a fuel injection system comprising a power supply (22) operatively connected to an injector driver stage (24) which, in turn, is operatively connected to at least one fuel injector (35). The electrical drive arrangement i...
https://drivepatents.com/patents/1004506 · 14 Mar 2012
The invention relates to a drive circuit (20a) for an injector arrangement comprising a fuel injector (12a,12b), and a method of detecting faults in the drive circuit (20a). The drive circuit (20a) comprises diagnostic means (R F ). The diagnostic means (R...
https://drivepatents.com/patents/1006832 · 28 Dec 2011
A fault detection method for detecting short circuit faults in an injector arrangement at engine start-up. The injector arrangement comprises one or more piezoelectric fuel injectors (12a, 12b), which are connected in a drive circuit (20). The potential (V...
https://drivepatents.com/patents/1011440 · 29 Jun 2011
The system (1) has a valve closing body (19) actuated by a piezoelectric actuator (10) i.e. piezoelectric multi-layer actuator, in an indirect manner and co-acting with a valve seat surface (20) at a sealing seat. A control (17) is connected with the actua...
https://drivepatents.com/patents/1015407 · 2 Mar 2011
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 (24,24) for increas...
https://drivepatents.com/patents/1067688 · 3 May 2006
A boosted voltage of a booster circuit (101) is applied to both a piezoelectric actuator (PA) through a diode (102) and to a parallel connection circuit of a capacitor (135) and a resistor (136) through a diode (133). When an operation of a controller (150...
https://drivepatents.com/patents/1069801 · 22 Feb 2006
The method for the operating of a piezo-actuator entails providing a first discharge passage (R1) between a first connection (Cp+) and a second operating potential (GND) with a charge state in which a first operating potential is applied to the first conne...
https://drivepatents.com/patents/1073219 · 19 Oct 2005
The fuel injection system for an internal combustion engine has at least one piezo-electric element for each cylinder to inject fuel into the cylinder through charging and discharging, a power supply source, and an injection control unit for the monitoring...