Robert Boschgmbh

Rolf-Dieter Koch

Michael Bachner

Thomas Zein

Stefan Scherer

Matthias Loehr

Jonas Ernst

Holger Ziegler

Lars Engelfried

Tahir Harman

Uwe Kossatz

Wolfram Faas

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.

Method for heating an exhaust system

A method and a unit for operating or for the operation of a fuel metering system of an internal combustion engine, in particular in a motor vehicle, and it being provided, in particular, that at least one operating variable of the internal combustion engine is detected, a dynamic operating state of the internal combustion engine is detected based on the at least one detected operating variable, and a dynamic correction to the fuel metering system of the internal combustion engine is carried out for a detected dynamic operating state of the internal combustion engine, taking into account the efficiency of an NOx exhaust gas aftertreatment system.

Method and unit for operating a fuel metering system in an internal combustion engine

A method is presented for controlling an internal combustion engine (), which includes an exhaust gas system () having an exhaust gas aftertreatment component () that temporarily stores exhaust gas constituents and can be regenerated, wherein an expected value for a temperature of the exhaust gas aftertreatment component () is formed as a function of an increase in temperature, which arises as a result of exothermal reactions during the duration of an operating mode (BA) of the internal combustion engine () which is set for the regeneration of said exhaust gas aftertreatment component (), wherein the expected value is compared with an upper threshold value (T_max) and the control of said internal combustion engine () is changed when the threshold value (T_max) is exceeded, such that an expected value formed while taking the changed control into account does not exceed said threshold value (T_max). The method is thereby characterized in that a direction of change of a current temperature of said exhaust gas aftertreatment component () is taken into account when forming the expected value.

Method for controlling an internal combustion engine in connection with an exothermal regeneration of an exhaust gas aftertreatment component

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Ditzingen, Germany

Rolf-Dieter Koch