Robert Boschgmbh

Thomas Zein

Klaus Winkler

Torsten Handler

Andreas Michalske

Jonas Ernst

Tahir Harman

Andreas Krautter

Enno Baars

Michael Bachner

Andreas Fritsch

Michael Walter

Frank Meier

Holger Plote

Juergen Sojka

Yunjie Lian

Jan Kappa

Sascha-Juan Moran Auth

Thomas Kirstaetter

Rolf-Dieter Koch

Matthias Stegmaier

Matthias Mansbart

Michael Stein

Markus Thanner

Gunther Kegel

Elke Baeder

Sascha Giese

Patrick Thierfelder

Albrecht Schmidt

Uwe Kossatz

Martin Elmer

Markus Willimowski

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 heating an exhaust system downstream from an internal combustion engine using an electrical heating device. The method includes an ascertainment of a current temperature in the exhaust system, an ascertainment of a current temperature of the electrical heating device and a fluid mass flow flowing through the electrical heating device, an ascertainment of a heating requirement based on the ascertained current temperature and a target temperature, a calculation of a required amount of heat depending on the heating requirement and an amount of energy required to heat up the electrical heating device, taking into account a heat input into the fluid mass flow to be expected at the ascertained current temperature of the electrical heating device, and a control of the electrical heating device to generate the calculated amount of heat. A computing unit and a computer program are also described.

Method for heating an exhaust system

A method for calculating reaction heat in an exhaust system of an internal combustion engine by means of a model, comprising a first model component and a second model component, wherein the first model component refers to a calculation of exhaust components flowing from valves of the internal combustion engine, the second model component relates to the entire exhaust system, and total masses from the first model component are divided along the exhaust system onto the individual components of the exhaust system.

Method for calculating reaction heat in an exhaust system

A method for controlling an internal combustion engine including at least one exhaust-gas aftertreatment component having an electric heating element, the electric heating element heating the exhaust-gas aftertreatment component and the exhaust gas flowing through the exhaust-gas aftertreatment component, the electric heating element briefly or permanently being acted upon by a heating current, a gas, in particular fresh air and/or exhaust gas, flowing downstream through the exhaust-gas path. In the method, a first temperature upstream from the at least one exhaust-gas aftertreatment component is ascertained, a second temperature downstream from the exhaust-gas aftertreatment component is ascertained, and the exhaust-gas mass flow of the internal combustion engine is ascertained as a function of a first temperature difference between the first and the second temperature and a heating power of the electric heating element, and the internal combustion engine is controlled as a function of the exhaust-gas mass flow.

Method for controlling an internal combustion engine including at least one exhaust-gas aftertreatment component having an electric heating element

A method for determining a conversion capability of one or multiple exhaust gas catalytic converters, downstream from an internal combustion engine. The method includes ascertaining a respective local temperature at multiple locations within the one or the multiple catalytic converters, ascertaining a local conversion capability for a section or a partial volume of the one or the multiple catalytic converters based on the local temperature, and ascertaining a global conversion capability of the one or the multiple catalytic converters based on the ascertained local conversion capabilities. A processing unit and a computer program product for carrying out such a method are also described.

Method, processing unit, and computer program for determining a conversion capability of an exhaust gas catalytic converter

A method () for heating an exhaust system () downstream of an internal combustion engine () by means of an electric heating device (). In one example, the method includes determining a current temperature (t_EHC, t_EHC{circumflex over (&#x2003;)}Us, t_Cat) in the exhaust system (), determining a heating demand (t_EHC{circumflex over (&#x2003;)}Des) based on the determined current temperature (t_Cat) and a target temperature, calculating a required amount of heat (Pwr{circumflex over (&#x2003;)}Des) on the basis of the heating demand and an amount of energy required to heat the electric heating device (), and controlling (Pwr{circumflex over (&#x2003;)}Req) the electric heating device () to generate the calculated amount of heat.

A method and device for regenerating an exhaust gas aftertreatment component for filtering soot particles in an engine having a first cylinder group, exhaust gases being guided through an exhaust gas channel and whose fuel/air mixture ratio is set via a fuel metering system, activated via a control unit, by a control loop for setting a lambda value using a signal of a first exhaust gas sensor, in the exhaust gas flow direction upstream from a catalytic converter, having at least another cylinder group, exhaust gases being guided through another exhaust gas channel and whose fuel/air mixture ratio is set via another fuel metering system by another control loop for setting another lambda value based on the signal of another exhaust gas sensor, in the exhaust gas flow direction upstream from a catalytic converter, the separate channels joined together downstream to form a shared channel, having a shared catalytic converter.

Method and device for regenerating a particle filter in a Y-exhaust gas system

A device and a method for controlling an internal combustion engine are provided, in which the fuel quantity to be injected is controlled as a function of a Lambda signal. A setpoint value for the Lambda signal is specified on the basis of at least one maximally permitted exhaust-gas temperature value.

Method and device for controlling an internal combustion engine

The invention concerns a procedure and a device for an adaptation of a dynamic model of an exhaust gas probe, which is a component of an exhaust pipe of a combustion engine and with which a lambda value is determined for regulating an air-fuel composition, whereby a simulated lambda value is calculated parallel to that in a control unit or in a diagnosing unit of the combustion engine and an application function uses the simulated and the measured lambda value. According to the invention it is thereby provided that a jump behavior of the exhaust gas probe is determined during a running vehicle operation by evaluating a signal change at a stimulation of the system and that the dynamic model of the exhaust gas probe is adapted with the aid of these results.

Procedure and device for an adaptation of a dynamic model of an exhaust gas probe

A method and device for controlling an internal combustion engine are provided. A first quantity characterizing the actually injected fuel amount and a second quantity characterizing the desired amount of fuel to be injected are determined on the basis of performance characteristics. The first quantity is compared to the second quantity. This comparison is used to define a first correction value for correcting a fuel amount and a second correction value for correcting an air amount. The first correction value is limited to a maximum value.

A method and a device for controlling an internal combustion engine, in which a first quantity characterizing the flow resistance of a first component of the exhaust-gas treatment system is determined based on a first measured quantity and a volumetric-flow quantity, and the volumetric-flow quantity is determined based on a second quantity which characterizes the flow resistance of a second component of the exhaust system.

Growing community of inventors

Sindelfingen, Germany

Thomas Zein