Robert Boschgmbh

Jonas Ernst

Thomas Zein

Michael Bachner

Tahir Harman

Rolf-Dieter Koch

Uwe Kossatz

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 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.

Growing community of inventors

Stuttgart, Germany

Jonas Ernst