Patent application number | Description | Published |
20090177365 | INJECTOR CALIBRATION METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - A method for operating an internal combustion engine has the steps: (a) during an overrun phase of the internal combustion engine, activating an injector of a first combustion chamber for a predetermined activation time τ | 07-09-2009 |
20100101544 | Method and Device for Determining an Operating Characteristic of an Injection System - In a method and a device for determining an operating characteristic of an injection system, to determine an operating characteristic ( | 04-29-2010 |
20100139620 | METHOD FOR CONTROLLING AN INJECTION SYSTEM OF AN INTERNAL COMBUSTION ENGINE - In a method for pressure control in an injection system of an internal combustion engine, a pump efficiency dependent upon the type of pump is taken into account in the control of a high-pressure stored value. To this end, the pump efficiency may be determined based on a stored table or a proximity function. | 06-10-2010 |
20100258083 | FUEL PRESSURE REGULATING SYSTEM - A fuel pressure regulating system for an internal combustion engine has a pressure accumulator which is used to store fuel under pressure and to feed the combustion chambers of the internal combustion engine by fuel-supplying injectors, a high-pressure pump which supplies a fuel mass flux to the pressure accumulator, a first valve via which the fuel can be guided out of the pressure accumulator, and a second valve for restricting the fuel mass flux. The system is provided with a first control loop having the first valve as an actuator for regulating the pressure in the pressure accumulator, and a second control loop having the second valve as an actuator for regulating the pressure in the pressure accumulator, and the two control loops are embodied as cascade regulators, the first control loop being a master regulator and the second control loop being a follower regulator. | 10-14-2010 |
20100286894 | METHOD AND DEVICE FOR ADAPTING AN INJECTION CHARACTERISTIC CURVE - When the internal combustion engine is in an injection-free operating mode, a selected injector is open for injecting a small fuel amount, whereby at least one working cycle with injector control follows or precedes one cycle without control, a differential of two subsequent segment times of the cylinder associated with the selected injector or another variable, that reproduces a temporal crankshaft angle speed modification, is determined as a measurement value respectively for the cycle with and without control, and a relation is formed between the values of the cycles with or without control and used to correct the injection characteristic curve. The engine operates with active ignition and the value for the cycle with control is tested by taking into account ignition faults and the relation is only used to correct the curve if the value in the cycle with control significantly deviates from the one without control. | 11-11-2010 |
20110308499 | METHOD AND DEVICE FOR OPERATING AN INTERNAL COMBUSTION ENGINE - Each cylinder bank of the internal combustion engine is assigned in each case one injection event memory (EES), an injection determining process (EEP) and an injection execution process (EAP). In the respective injection determining process (EEP), desired injection events (EE) are determined for the associated cylinder bank. These injection events are stored in succession in the respectively associated injection event memory (EES). In the respective injection execution process (EAP), injection events (EE) are retrieved in succession from the associated injection event memory (EES) and executed in a sequence in which they were stored in the associated injection event memory (EES) by the associated injection determining process (EEP) (FIFO: first in first out). The in each case next injection event (EE) is executed only after the end of an execution of the in each case previously executed injection event (EE). | 12-22-2011 |
20120180755 | Injector - An injector includes a control valve for opening a connection between a control chamber for controlling a nozzle needle position and a prechamber of a fluid return line, wherein a pressure compensation device is arranged in the prechamber for compensating a change in a prechamber pressure. | 07-19-2012 |
20120234298 | CLASSIFICATION METHOD FOR AN INJECTOR, CALIBRATION METHOD FOR A CHARACTERISTIC MAP OF AN INJECTOR, AND TEST BENCH DEVICE FOR AN INJECTOR - A classification method for an injector may include: actuating the injector by means of a predefinable test control signal, detecting a quantity of liquid dispensed by the injector on the basis of the test control signal, classifying the injector as a function of the detected dispensed quantity of liquid, and determining a required control signal on the basis of the classification of the injector considering a reduced injector stroke. A calibration method for a characteristic map of an injector, and a test bench device for performing the injector classification method are also provided. | 09-20-2012 |