Robert Boschgmbh

Frank Meier

Thomas Bleile

Wolfgang Kraemer

Peter Rupp

Gerhard Engel

Manfred Birk

Bernd Kesch

Daniel Rieker

Helmut Weyl

Michael Nau

Holger Jessen

Thomas Zein

Frank Brenner

Peter Dettling

Thomas Seiler

Martin Knopp

Yunjie Lian

Jan Kappa

Gerhard Lemke

Pascal Gladel

Bettina Schneider

Benedikt Kraus

Stefan Klein

Peter Brida

Stephan Otto

Engel Gerhard

Cyril Verdier

Alexander Baumann

Karsten Glashoff

Gunther Kegel

Miroslav Bilac

A method for determining a nitrogen oxide emission and an ammonia emission in the combustion exhaust gas of an engine system having an exhaust-gas-guided internal combustion engine using an output-side nitrogen oxide sensor having a cross-sensitivity to ammonia. The method including: detecting a measurement signal of the nitrogen oxide sensor; ascertaining a partial conversion indication for each of multiple catalytic converter segments arranged in series in the combustion exhaust gas depending on local operating conditions with the aid of a provided conversion model that maps a local operating condition on the partial conversion indication; determining a conversion indication from the multiple partial conversion indications; and ascertaining a nitrogen oxide emission and an ammonia emission depending on the measurement signal and the conversion indication.

Method and device for measuring nitrogen oxide and ammonia emissions from an exhaust gas aftertreatment system for combustion exhaust gases

A method () for operating an exhaust gas system () that includes a first catalytic converter () and at least one second catalytic converter (), which are both arranged downstream from an internal combustion engine () The internal combustion engine () is controlled to generate a rich exhaust gas having a first rich gas portion, () a fill level of the second catalytic converter () is ascertained with respect to at least one lean gas component that is storable in the second catalytic converter and, if the ascertained fill level drops below () a minimum fill level, () the internal combustion engine () is controlled to generate a lean exhaust gas. The internal combustion engine () is then controlled to generate a rich exhaust gas having a second rich gas portion, and subsequently controlled () to generate the rich exhaust gas having the first rich gas portion.

Method, processing unit, and computer program for operating an exhaust gas system

In a method for operating a motor vehicle having an internal combustion engine, pre-heating measures () for reaching operating temperatures for components of the exhaust-gas post-treatment system and/or for a lambda probe of the motor vehicle are provided prior to the departure () of the motor vehicle. The activation of a transducer () by a driver of the motor vehicle for explicitly announcing an impending departure of the motor vehicle is provided as the trigger for the pre-heating measures (), in particular for avoiding an unnecessary initiation of pre-heating measures.

Method for operating a motor vehicle

A method for operating a hybrid drive system which includes ascertaining an overall cost function that takes into account the cost function, which is a function of the operating point, for minimizing an energy usage of the hybrid drive system, and that takes into account one or more partial cost functions, which are a function of the operating point, which are each assigned to a requested special function; determining an optimized operating point of the hybrid drive system corresponding to an optimization according to the ascertained overall cost function; operating of the hybrid drive system at the operating point; and executing of those of the requested special functions for which the determined operating point is within an operating range assigned to the respective special function.

Method and device for operating a hybrid drive system

A method for operating a driving system of a motor vehicle, in particular, the driving system having an internal combustion engine and at least one electric motor, and during warm-up of the internal combustion engine, the latter being loaded with a specifiable torque; and the at least one electric motor generating a torque at least at times, to unload or load the internal combustion engine. An actual torque of the internal combustion engine is compared to a specifiable first setpoint torque of the internal combustion engine; a difference of the actual torque from the first setpoint torque being formed; and a time integral being formed over the difference formed; and a fault being detected in the warm-up of the internal combustion engine, as a function of the time integral formed.

Method for operating a driving system, in particular, of a motor vehicle

A method is described for diagnosing a heatable exhaust gas sensor of an internal combustion engine, in which a predefined chronologically varying or constant voltage or a predefined chronologically varying or constant current is generated with the aid of a voltage source, the voltage or the current is applied to terminals of the exhaust gas sensor, a current or applied voltage, which flows through the voltage source when the voltage or the current is applied, is detected, and the current or the voltage is analyzed to diagnose the exhaust gas sensor. To diagnose the exhaust gas sensor, which permits a reliable and accurate diagnosis of the exhaust gas sensor and allows a statement about the type of a possibly existing error on the exhaust gas sensor, the method is executed independently of a control and/or regulating unit of the internal combustion engine, an operating temperature of the exhaust gas sensor being regulated to a predefined temperature value with the aid of a regulating element, which is separate from the control and/or regulating unit.

Method and diagnostic device for diagnosing a heatable exhaust gas sensor of an internal combustion engine

A sensor for measuring a physical property of a measuring gas, in particular the oxygen concentration or the temperature in the exhaust gas of an internal combustion engine in a motor vehicle, has a housing, a measuring element whose end section protrudes from the housing, a connector plug mounted on the end section, and a housing shell covering the end section and connector plug with a radial clearance, one shell end of the housing shell being attached to the housing and the other shell end being sealed. To prevent electromechanical breakage in the sensor in the event of extreme vibration stresses or accelerations of the vehicle, the free space within the housing shell is completely filled with a non-conductive granulate.

Sensor

A device and a method for controlling an internal combustion engine with an air system are described. At least one variable characterizing the air system is determined on the basis of at least one correcting variable and/or at least one measured variable characterizing the state of the ambient air, using at least one model. The model includes at least one first and one second submodel. Using a submodel, the output variables are determined on the basis of input variables. As input variables of the first submodel, besides at least one output variable of a second submodel, the correcting variable and/or the measured variable are additionally taken into account.

Method and device for controlling an internal combustion engine that is provided with an air system

A method and device are for controlling an internal combustion engine. Using at least one model, an oxygen quantity flowing into the internal combustion engine is determined on the basis of at least one manipulated variable and at least one measured variable which characterizes the condition of the air in an intake manifold. The oxygen quantity is determined on the basis of at least one temperature variable, one pressure variable, one speed variable, one fuel-quantity variable and one air variable.

Method and device for controlling an internal combustion engine

The turbine of the exhaust gas turbocharger, which is located in the exhaust gas channel of the internal combustion engine, has a variable geometry. The regulation of the boost pressure is performed via an adjustment of the turbine geometry. A very rapid response of the boost pressure regulation to a variable load, with an overshoot of the specified value, which would damage the turbocharger, being avoided, is achieved by determining a manipulated variable for the turbine geometry as a function of the exhaust gas back pressure prevailing in the exhaust gas channel upstream from the turbine.

Method and device for regulating the boost pressure of an internal combustion engine

In a device for switching an exhaust gas turbocharger and an exhaust gas turbocharger having such a device, the device is used for exhaust gas turbochargers having a variable turbine geometry as well as for other turbochargers (e.g., waste-gate turbochargers) having an electronically regulated final controlling element. The exhaust gas turbocharger is switched by a switching signal P from a regulated operation A with a boost pressure regulator to an unregulated operation B with a boost pressure control, wherein a delay device is provided for generating the switching signal P with a time delay.

Growing community of inventors

Kornwestheim, Germany

Frank Meier