About 82 results
https://drivepatents.com/patents/1096903 · 9 Apr 2003
A liquid injection apparatus (10) comprises an injection device (15), and an electro-magnetic injection valve (14) for ejecting pressurized fuel into the injection device. An ejection hole in the electro-magnetic injection valve is connected to a hollow cy...
https://drivepatents.com/patents/1099054 · 15 Jan 2003
The piezoelectric drive control mechanism has a dc to dc voltage converter elevator (E) providing a continuous voltage and current drive. The converter elevator has two assemblies with inductors (L1, L2) connected to switches (SW1,SW2) in parallel with dio...
https://drivepatents.com/patents/1102169 · 28 Aug 2002
A piezoelectric actuator drive circuit (2) has an abnormality detection circuit section (29E, 29F). The abnormality detection circuit section (29E, 29F) is provided with a voltage detection means (31) for detecting the voltage (Vcom) of a connection termin...
https://drivepatents.com/patents/1106399 · 27 Feb 2002
A converter (CV) is supplied with low voltage and produces a high voltage, and is connected to a ceramic load circuit (C). A discharge circuit for the inductance is made conducting until the discharge current in the inductance (L) becomes zero, speeding up...
https://drivepatents.com/patents/1109440 · 10 Oct 2001
The invention describes a method and an apparatus for charging a piezoelectric element, for example, used as an actuator in a fuel injection system of an internal combustion engine. The method and apparatus are characterized in that the piezoelectric eleme...
https://drivepatents.com/patents/1109593 · 4 Oct 2001
The invention describes a method and an apparatus for charging a piezoelectric element, for example, used as an actuator in a fuel injection system of an internal combustion engine. The method and apparatus are characterized in that the piezoelectric eleme...
https://drivepatents.com/patents/1109591 · 4 Oct 2001
The invention describes a method and apparatus for a fuel injection system with a piezoelectric element (10, 20, 30, 40, 50 or 60) for controlling the amount of injected fuel by applying a voltage to the piezoelectric element (10, 20, 30, 40, 50 or 60), ch...
https://drivepatents.com/patents/1109595 · 4 Oct 2001
The invention describes a method and an apparatus for charging a piezoelectric element, for example, used as an actuator in a fuel injection system of an internal combustion engine. The method and apparatus are characterized in that the piezoelectric eleme...
https://drivepatents.com/patents/1109589 · 4 Oct 2001
A method and apparatus for timed measurement of a voltage across a device in a charging circuit of piezoelectric element. The voltage across the device is sensed and read at a predefined time in synchronization with an injection event of the at least one p...
https://drivepatents.com/patents/1109580 · 4 Oct 2001
The invention describes a method and an apparatus for driving fuel injectors divided into a plurality of injector banks, each bank containing at least one piezoelectric element, each bank being selected for charging or discharging by a bank-selection switc...