Patent application number | Description | Published |
20100269794 | FUEL PRESSURE REGULATION SYSTEM - In a fuel pressure regulating system for an internal combustion engine, having a pressure accumulator storing fuel under pressure and feeding injectors providing the combustion chambers of the internal combustion engine with fuel, a high-pressure pump feeding a fuel mass flow into the pressure accumulator, a first valve for throttling the fuel mass flow, a second valve by means of which fuel can be discharged from the pressure accumulator, and a control unit for actuating the valves, the control unit determines a fuel mass flow required by the pressure accumulator depending on a prescribed target pressure in the pressure accumulator, divides the determined fuel mass flow into a partial mass flow fed in by the first valve and discharged by the second valve, and actuates the valves according to the partial mass flows. | 10-28-2010 |
20100292811 | METHOD FOR DETERMINING ADAPTED MEASURING VALUES AND/OR MODEL PARAMETERS FOR CONTROLLING THE AIR FLOW PATH OF INTERNAL COMBUSTION ENGINES - In a method for determining adapted measuring values and/or model parameters for controlling the air flow path of internal combustion engines, at least two measuring values and/or model parameters are simultaneously adapted, at least one total error variable which describes an inconsistency of the measuring values and model parameters being divided into individual correction variables for the measuring values and/or model parameters to be adapted, and these correction variables being applied to the measuring values and/or model parameters to be adapted. | 11-18-2010 |
20110023848 | DEVICE FOR CONTROLLING THE EXHAUST-GAS TURBOCHARGING OF AN INTERNAL COMBUSTION ENGINE, AND INTERNAL COMBUSTION ENGINE - A device for controlling the exhaust-gas turbocharging of an internal combustion engine having an exhaust-gas turbocharging device, has an estimated value unit for determining a mass flow through a turbine system, a regulating unit for determining a regulating exhaust-gas back pressure as a function of a nominal charge pressure and an actual charge pressure, and also a unit for generating at least one actuating signal for at least one actuator of the turbine system as a function of the regulating exhaust-gas back pressure and of the mass flow through the turbine system, wherein the estimated value unit has a turbine system model for determining an estimated overall efficiency of the turbine system and a model for determining an estimated overall efficiency of a compressor system having at least two compressors, and wherein the regulating unit is set up to determine the regulating exhaust-gas back pressure using the estimated overall efficiencies | 02-03-2011 |
20130166179 | Method and Device for Operating an Injection Valve - An injection nozzle has a nozzle needle that suppresses metering of fluid in a closed position and otherwise allows the metering of fluid. Furthermore, the injection valve has a solid-state actuator that acts on the nozzle needle. A first operating phase is performed for a closing operation in a first operating mode, during which first operating phase the solid-state actuator is discharged to a predefined part charge. Furthermore, a second operating phase is performed, during which the solid-state actuator is operated as a sensor. An operating duration of the second operating phase is predefined such that the closed position of the nozzle needle is reached during the operating duration. A third operating phase is performed, during which the solid-state actuator is discharged further to a predefined reference state. In a second operating mode, the first and second operating phases are carried out and the third operating phase is omitted. | 06-27-2013 |
20130233936 | Method for Controlling the Injection Quantity of a Piezoinjector of a Fuel Injection System - A method for controlling the injection quantity of a piezoinjector of a fuel injection system, which comprises a nozzle needle displaceable by a piezoactuator. Based on the instantaneous injection quantity, a selection is made among various control methods. In a ballistic injector mode, a first control method is carried out, wherein both a needle closing point in time is equalized and a needle travel time is also equalized. In a full stroke injector mode, a second control method is carried out, wherein a needle closing point in time is equalized, but the needle travel time is not equalized. | 09-12-2013 |
20140033811 | Method for Detecting Faulty Components of an Electronically Regulated Fuel Injection System of an Internal Combustion Engine - A method for detecting error-containing components of a piezo-injector in an internal combustion engine fuel-injection system is disclosed. The piezo-injector has a piezoelectric actuator and an injection needle driven thereby, and is configured for operation in a partial-stroke mode and a full-stroke mode. First, the internal combustion engine is brought to a defined operational point. Then, the time for the injector needle to strike its stop when said injector needle is opened, as well as the time for the injector needle to strike its needle seat again when said injector needle is closed, are measured. The measured times are compared to normal values determined at the test stand. Parameter(s) for the fuel-injection system are calculated, using different calculation models, and the results are stored. Finally, the calculated parameters of the different calculation models are compared to norm values determined at the test stand, and compared to one another. | 02-06-2014 |
20140346244 | Control Method For An Injection Valve And Injection System - A control method for a fuel injection valve for an internal combustion engine is disclosed, wherein at least one control signal for actuating a drive of the injection valve is generated in recurring injection cycles and as a function of a target stroke height of a closing element of the injection valve, wherein the drive is actuated by the control signal to lift the closing element to the target stroke height and the closing element is lifted to an actual stroke height by means of the drive, wherein at least one measured parameter correlated with the actual stroke height is captured and the actual stroke height is determined as a function of said at least one measured parameter, wherein the control signal is generated in at least one of the subsequent injection cycles as a function of a deviation of the actual stroke height from the target stroke height. | 11-27-2014 |