| 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 |
| 20100011744 | Method And Device For The Diagnosis Of The Effectiveness Of A Catalytic Converter - In a method and a device for the diagnosis of the effectiveness of a catalytic converter in the exhaust gas line when using a very late afterinjection or secondary injection, in order to provide a sensitive and yet robust diagnostic method while saving costs for additional exhaust gas temperature sensors and with fuel consumption increased only to a minimum extent, the diagnostic method delivering reliable results with only little delay, and a corresponding device which can also easily be used in various concepts for internal combustion engines, an increased compressor output, caused in the course of the test injection, of an exhaust gas turbocharger used downstream of the catalytic converter produce a higher charge pressure or a marked increase in the air mass flow (mL) such that the effectiveness of the catalytic converter is determined from a change in the intake air quantity of the internal combustion engine. | 01-21-2010 |
| 20100037873 | INTERNAL COMBUSTION ENGINE AND ASSOCIATED OPERATING METHOD - In a method of operating an internal combustion engine having at least two combustion chambers, each combustion chamber contributes torque to the total torque of the internal combustion engine, and the internal combustion engine is designed in such a way that a quantity of exhaust gas can be recycled into combustion chambers. The method has the steps: (a) detecting the torque contributions of at least two combustion chambers, then (b) changing the quantity of exhaust gas recycled into the combustion chambers, the torque contribution of which has been detected in step (a), then (c) detecting the torque contributions of at least two combustion chambers, the torque contribution of which has been detected in step (a), then (d) determining the change in the torque contributions as a result of the change in the quantity of recycled exhaust gas, and then (e) outputting a signal as a function of the change in the torque contributions. | 02-18-2010 |
| 20100049426 | METHOD FOR DETERMINING AN UNCONTROLLED ACCELERATION OF AN INTERNAL COMBUSTION ENGINE - In a method for determining an uncontrolled acceleration of an internal combustion engine, a valve opening cross section is allocated to each load state of the internal combustion engine. In the event that a controller value is outside a limit range, an uncontrolled acceleration of the internal combustion engine is thereby detected. | 02-25-2010 |
| 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 |
| 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 |
| 20110079199 | METHOD FOR DETECTING DEVIATIONS OF INJECTION QUANTITIES AND FOR CORRECTING THE INJECTION QUANTITY, AND INJECTION SYSTEM - A method provides for detecting deviations of injection quantities for injections into internal combustion engines, as carried out for example by common-rail systems. At least one deviation of at least one injection quantity is detected by determining at least one deviation, from a predefined value in each case, of at least one value of at least one variable controlling an actuator of the injector and/or indicating at least one state of the actuator. | 04-07-2011 |
| 20110116938 | METHOD FOR CONTROLLING A HIGH-PRESSURE FUEL PUMP - In a method for controlling a high-pressure fuel pump, which comprises an electrically controllable electromechanical inlet valve ( | 05-19-2011 |
| 20110118958 | METHOD FOR ADAPTING THE PERFORMANCE OF A FUEL PREFEED PUMP OF A MOTOR VEHICLE - In a method for adapting the performance of a fuel prefeed pump of a motor vehicle which has a common rail injection system and an internal combustion engine, after the ignition is switched on and before the internal combustion engine is started, adaptation values are determined and stored which are assigned to the fuel prefeed pump and describe its individual performance. After the internal combustion engine is started, the stored adaptation values are taken into consideration during the determining of an actuating signal for the prefeed pump. | 05-19-2011 |
| 20110120417 | METHOD AND DEVICE FOR CONTROLLING THE FUEL PRESSURE IN THE PRESSURE ACCUMULATOR OF A COMMON-RAIL INJECTION - In a method and a device for controlling the fuel pressure in the pressure accumulator of a common-rail injection system, the difference between the actual engine speed and a target engine speed is established, and an injection time is determined based on the determined difference. The fuel pressure is controlled according to the determined injection time. | 05-26-2011 |
