Patent application number | Description | Published |
20130333455 | Method For Monitoring The State Of A Piezoelectric Injector Of A Fuel Injection System - A method is disclosed for monitoring the state of a piezoelectric injector of the fuel injection system of an internal combustion engine, the piezoelectric injector having a piezoelectric actuator and a nozzle needle that can be moved by said piezoelectric actuator. The piezoelectric injector can be operated in a partial-stroke mode and a full-stroke mode. In the partial-stroke mode, the curve of an electrical parameter over time is recorded, the maximum value of the curve is determined, a constant parameter value that arises after the presence of the maximum value is determined, the duration between the presence of the maximum value and the reaching of the constant parameter value is determined, the difference between the maximum value and the constant parameter value is determined, and conclusions about the state of the piezoelectric injector are drawn on the basis of the determined duration and the determined difference. | 12-19-2013 |
20140007665 | Method For Determining The Force Conditions At The Nozzle Needle Of A Directly Driven Piezo Injector - A method is disclosed for determining the force acting on the nozzle needle of a directly driven piezo injector, in which an electrical voltage is built on the piezo actuator which drives the nozzle needle by means of a charging process. After the charging process has ended, the voltage at the piezo actuator is measured again. A voltage gradient is determined from consecutive voltage values. Conclusions of the force acting on the nozzle needle are drawn from the voltage gradients. | 01-09-2014 |
20140060488 | Method for Determining the Idle Travel of a Piezo-Injector with a Directly Actuated Nozzle Needle - A method is disclosed for determining the idle travel of a piezo-injector which has a piezo-actuator and a nozzle needle which is activated directly by the piezo-actuator. A test pulse is applied to the piezo-actuator, which pulse brings about a continuous increase in the piezo-travel. The time period is measured which passes between the starting of the test pulse and the time when the idle travel is overcome. The idle travel of the piezo-injector is then determined from the measured time period. | 03-06-2014 |
Patent application number | Description | Published |
20090021897 | ASSEMBLY WITH A HOUSING - An assembly with a housing, having a storage cell with two electrical poles, in which the storage cell is retained in the housing, with two electric lines, and each line is connected to one of the electrical poles, and the two lines are extended to two electrical contacts, having a protection device, which is disposed in the current flow of at least one of the two lines, and the protection device is disposed outside the storage cell in the housing, and the protection device protects the storage cell against overheating and/or excess current. | 01-22-2009 |
20100104226 | Electrical machine with rotor bearing - A motor, in particular an electrical machine, has a housing, a rotor, and a rotor bearing which includes at least two bearing parts which are rotatable relative to one another, one of which is assigned to the rotor, and the other of which is assigned to the housing. The rotor bearing is designed as a sintered part, and that the bearing part assigned to the housing includes a rotation lock, and/or that the bearing part assigned to the rotor includes a rotation lock. | 04-29-2010 |
20100116517 | HAND MACHINE TOOL, BATTERY PACK, AND CHARGER - The invention describes a hand machine tool, a battery pack, or a charger for at least one battery, or for a battery pack, having a housing, or part of a housing, made of at least one plastic, and having at least one indicator component mixed in with the at least one plastic. | 05-13-2010 |
20100141186 | ELECTRIC TOOL AND DEVICE SWITCH FOR AN ELECTRIC TOOL - The invention relates to a device switch for an electric tool, in particular a battery-operated electric tool. A power circuit for supplying power of a motor and an electronic circuit for monitoring the temperature, power and current is integrated into the device switch. The invention moreover relates to a method for monitoring an electric tool, in particular an electric tool with rechargeable battery operation. | 06-10-2010 |
20100172392 | MEASUREMENT ARRANGEMENT FOR MEASURING A TEMPERATURE OF A RECHARGEABLE POWER SUPPLY DEVICE - A measurement arrangement for measuring a temperature of a rechargeable power supply device, such as a battery pack, for an electrical appliance. The power supply device has at least one measurement object, such as a battery. At least one thermosensor element, such as a PTC or NTC resistor, is provided on a ribbon cable and is positioned between the measurement object and an outer sheath. | 07-08-2010 |