Patent application number | Description | Published |
20120152207 | METHOD FOR OPERATING A FUEL INJECTOR OF AN INTERNAL COMBUSTION ENGINE, AND CONTROL DEVICE FOR AN INTERNAL COMBUSTION ENGINE - In a method for operating a fuel injector, a transition range of the characteristics curve of the injector is detected individually and adapted continuously, so that a monotonous characteristics curve is formed, with whose aid high metering precision of the injector is achieved. | 06-21-2012 |
20120158271 | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - A method for operating an internal combustion engine, in particular, of a motor vehicle. The internal combustion engine includes an injector having a nozzle needle for injecting fuel into a combustion chamber of the internal combustion engine, as well as an output stage component. A desired signal is specified for a lift characteristic of the nozzle needle. The injector is activated by the output stage component. A lift signal is ascertained that corresponds to the actual lift characteristic of the nozzle needle. An actual signal is ascertained from the lift signal. A deviation signal is ascertained in response to a deviation of the actual signal from the desired signal. | 06-21-2012 |
20120191327 | METHOD AND CONTROL TOOL FOR OPERATING A VALVE - A method for operating a valve actuated by way of an actuator, in particular a fuel injection valve of an internal combustion engine of a motor vehicle, in which a first delay time is identified, which time characterizes a time difference between a point in time of a first change in an energization signal for the actuator and a point in time of a first change in the operating state of the valve corresponding to the first change in the energization signal. According to the present invention, from the first delay time at least one second delay time of the valve is inferred, which latter time characterizes a time difference between a point in time of a second change, different from the first change, in the energization signal and a point in time of a second change in the operating state of the valve corresponding to the second change in the energization signal. | 07-26-2012 |
20120271536 | METHOD AND DEVICE FOR RECOGNIZING UNCONTROLLED COMBUSTIONS IN AN INTERNAL COMBUSTION ENGINE - A method for recognizing uncontrolled combustions in an internal combustion engine which occur independently of the ignition by a spark plug. The pressure oscillations in the combustion chamber triggered by the combustion are detected and evaluated. To allow identification at any time of an uncontrolled combustion prior to ignition by the spark plug and/or prior to the normal combustion initiation for a given ignition point, the rotational speed of a crankshaft of the internal combustion engine which is influenced by the pressure oscillations, is evaluated. | 10-25-2012 |
20120291757 | METHOD AND CONTROL UNIT FOR OPERATING A VALVE - A method for operating a valve, in particular a fuel injector of an internal combustion engine of a motor vehicle, in which an auxiliary variable is obtained as a function of at least one electrical operating variable of an electromagnetic actuator driving a component of the valve, in particular a valve needle, and in which the auxiliary variable is checked for the presence of a predefinable characteristic. A reference variable which characterizes the operating behavior of the electromagnetic actuator is ascertained, the auxiliary variable is modified as a function of the reference variable to obtain a modified auxiliary variable, and the modified auxiliary variable is checked for the presence of the predefinable characteristic. | 11-22-2012 |
20120296554 | Method for operating an internal combustion engine - A method for operating an internal combustion engine in which a speed-based feature of the internal combustion engine, which is correlated with an indicated mean effective pressure of the fuel, is determined during the warm-up of the internal combustion engine and an ideal fuel quantity, which is to be injected into at least one combustion chamber of the internal combustion engine during the warm-up, is ascertained therefrom. | 11-22-2012 |
20130013170 | Method And Control Unit For Operating A Valve - A method for operating a valve, in particular a fuel injector of an internal combustion engine of a motor vehicle, in which an auxiliary variable is obtained as a function of at least one electrical operating variable of an electromagnetic actuator driving a component of the valve, in particular a valve needle, and in which the auxiliary variable is checked for the presence of a predefinable characteristic. A reference variable is ascertained as a function of the auxiliary variable, the auxiliary variable is modified as a function of the reference variable to obtain a modified auxiliary variable, and the modified auxiliary variable is checked for the presence of the predefinable characteristic. | 01-10-2013 |
20130306034 | METHOD AND DEVICE FOR ACTUATING AN INJECTOR IN A FUEL INJECTION SYSTEM OF AN INTERNAL COMBUSTION ENGINE - A device and a method for actuating an injector in a fuel-injection system of an internal combustion engine are described. Using a first calibration method and based on a control parameter, an injector parameter which characterizes the injection process is determined. Starting from this injector parameter, a first feature is determined for calibrating the injector. A second calibration method determines a second feature for calibrating the injector, based on an engine parameter. The first calibration method is monitored on the basis of the second feature. | 11-21-2013 |
20140007847 | METHOD FOR ACTIVATING AN INJECTOR IN A FUEL INJECTION SYSTEM IN AN INTERNAL COMBUSTION ENGINE - A method for activating an injector in a fuel injection system in an internal combustion engine, the fuel injection system including a plurality of injectors and a quantity of fuel injected with the aid of an injector being a function of the activation period of the injector. An injector-individual correction value for the activation period is ascertained for at least one injector as a function of a pressure and a temperature of the fuel to be injected and the activation for this injector takes place under consideration of the injector-individual correction value. | 01-09-2014 |
20140318227 | METHOD FOR ASSESSING AN INJECTION BEHAVIOUR OF AT LEAST ONE INJECTION VALVE IN AN INTERNAL COMBUSTION ENGINE AND OPERATING METHOD FOR AN INTERNAL COMBUSTION ENGINE - A method for assessing an injection behavior of at least one injection valve of an internal combustion engine includes putting the internal combustion engine into a special operating mode defined by control parameters and operating the engine in the special operating mode during a diagnostic time period, at least one operating parameter of the internal combustion engine being determined at least during the diagnostic time period, and at least one quantity characterizing the injection behavior of the at least one injection valve being evaluated at least during a segment of the diagnostic time period and being evaluated on the basis of the at least one operating parameter. | 10-30-2014 |
20140343826 | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE - A method for operating an internal combustion engine having two or more cylinders to which fuel can be supplied via an injection valve, it being possible to carry out a measurement injection for a cylinder in order to determine and/or adapt a characteristic quantity of the injection valve, and all the cylinders being ignited in the course of an ignition cycle. To improve the operating characteristics, a measurement injection is carried out for those cylinders that are contained in a specifiable selected set selected from all the cylinders. | 11-20-2014 |