Patent application number | Description | Published |
20100301244 | POLE TUBE - A pole tube of a solenoid actuator including a non-magnetic intermediate piece having a first intermediate end face and a second intermediate end face, a pole piece having a pole end face configured to join the first intermediate end face at a first joining region, and a tube piece having a tube end face configured to join the second intermediate end face at a second joining region. At least two of the intermediate piece, the pole piece and the tube piece are configured to be connectable to each other using electric fusion. At least two of the intermediate piece, the pole piece and the tube piece have a different conductivity. A respective part of the pole and tube pieces disposed in corresponding first and second joining regions are configured to each have an electrical resistance substantially equal to an electrical resistance of a part of the intermediate piece. | 12-02-2010 |
20110147629 | SOLENOID ARRANGEMENT AND VALVE ARRANGEMENT - A solenoid arrangement comprises a pole tube which is axially subdivided into a pole core section, a transition section, and a tube section. A magnetic flux between the pole core section and the tube section is interrupted by the transition section. An armature is movably guided in the pole tube and has, at its end facing the pole core section, a flange which axially projects from an end face. According to the invention, the pole core section has a stepped depression into which the armature can plunge and which, starting from the transition section, is subdivided into an annular collar, a shoulder, and a notch which is set back axially and radially. An axial dimension of the collar exceeds an axial dimension of the flange. | 06-23-2011 |
20110168932 | SOLENOID ARRANGEMENT AND VALVE ARRANGEMENT - The invention relates to a solenoid wherein a magnetic discontinuity is formed in the pole tube by means of reducing the effective material thickness, such as by reducing the thickness, particularly the wall thickness of the magnetically active material, the front face of the armature facing the polker segment and a floor in the interior of the pole tube at the polker segment each have a contour allowing mutual axial overlapping. This enables advantageous influencing of the force-stroke characteristic curve of the solenoid with low production effort. | 07-14-2011 |
Patent application number | Description | Published |
20100095936 | METHOD AND CONTROL DEVICE FOR CONTROLLING A FUEL INJECTOR - A method for controlling a fuel injector, having a piezoelectric actuator, for an internal combustion engine. The method includes a step of controlling the actuator using an actuator current signal for a fuel injection, an actual actuator voltage being ascertained during the fuel injection. After a comparison of whether the actual actuator voltage is greater than an actuator voltage threshold value, if the actual actuator voltage is greater than the actuator voltage threshold value, the actuator current signal is controlled for an additional fuel injection, in such a way that the actual actuator voltage approaches a setpoint actuator voltage, during the additional fuel injection. Also a computer program product for carrying out the method, and a control device for controlling a piezoelectric actuator of a fuel injector for an internal combustion engine are also provided. | 04-22-2010 |
20110101992 | METHOD AND DEVICE FOR MONITORING A PIEZO ACTUATOR - The invention describes a device and a method for monitoring a piezoelectric actuator. It is checked whether a discharge time assumes an inadmissible value, whether the voltage at the piezoelectric actuator assumes an inadmissible value and whether a fault signal is present. A short circuit of a battery switch is detected if the three conditions are met. | 05-05-2011 |
20110139124 | Method for operating at least one injector of an internal combustion engine - A method for operating at least one injector of an internal combustion engine, in which a voltage applied to the injector is varied, and a rotational speed pattern of the internal combustion engine is ascertained as a function of the voltage, a setpoint voltage, suitable for operating the at least one injector, corresponding to that varied applied voltage for which a peak arises in a spectrum of the rotational speed pattern. | 06-16-2011 |
20110140685 | METHOD FOR DIAGNOSING A LOAD DROP - A method for diagnosing a load drop in a piezo actuator in an injection device, a voltage being measured and being compared to a threshold voltage ( | 06-16-2011 |
20120016572 | METHOD FOR PERFORMING A NUMBER OF INJECTIONS - In a method for carrying out a number of injections for at least one cylinder of an internal combustion engine, a reference point in time for a control application onset of an injection is ascertained for the at least one cylinder, and a target point in time for the control application onset is determined from the reference point in time plus a delay time. | 01-19-2012 |
Patent application number | Description | Published |
20100003551 | METHOD FOR OPERATING A FUEL CELL SYSTEM IN A MODE OF REDUCED POWER OUTPUT - The invention relates to a method for operating a fuel cell system in a mode of reduced power output. The fuel cell system comprises a fuel cell stack (BS) having at least one fuel cell (BZ) with an anode (A), a cathode (K), and a proton exchange membrane, anode and cathode inlets, anode and cathode outlets, and a hydrogen and air supply. In order not to adversely affect the life span of the fuel cell system, the air supply to the cathode (K) is interrupted during the changeover to the mode of reduced power output, and an electric voltage (U) of the fuel cell stack (BS) is reduced by means of a current pulse. | 01-07-2010 |
20100221632 | Method and Apparatus for Forming a Wetting Nominal Value for a Fuel Cell Unit - In a method and apparatus for wetting a fuel cell unit on the basis of a predetermined dew point nominal value as a function of the operating state of the fuel cell unit, a corrected dew point nominal value is determined using a predetermined dew point nominal value, a component-specific correction value, and a process correction value. The corrected dew point nominal value is used to set the required amount of water for optimum wetting of the fuel cell unit. | 09-02-2010 |
20110097636 | Disconnecting Procedure For Fuel Cell Systems - A method for shutting down a fuel cell system having at least one fuel cell, especially a fuel cell provided with a proton exchanging membrane, anode and cathode inlets, anode and cathode outlets, an anode recirculation circuit, a device which is operated according to the Venturi principle and is used to convey the gas in the anode recirculation circuit, and a hydrogen and air supply is disclosed. A method characterized by low emission values and high efficiency is provided. The hydrogen supply to the anode is interrupted during shutdown of the fuel cell system and the current generated from the residual hydrogen is supplied to an electric consumer. | 04-28-2011 |