US 12,276,220 B2
Method for heating an exhaust system
Jonas Ernst, Stuttgart (DE); Michael Bachner, Stuttgart (DE); Tahir Harman, Tamm (DE); and Thomas Zein, Sindelfingen (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Mar. 18, 2024, as Appl. No. 18/607,919.
Claims priority of application No. 102023202447.0 (DE), filed on Mar. 20, 2023.
Prior Publication US 2024/0328334 A1, Oct. 3, 2024
Int. Cl. F01N 3/20 (2006.01); F01N 3/035 (2006.01)
CPC F01N 3/2013 (2013.01) [F01N 3/035 (2013.01); F01N 2900/12 (2013.01); F01N 2900/1402 (2013.01); F01N 2900/1406 (2013.01); F01N 2900/1411 (2013.01); F01N 2900/1602 (2013.01); F01N 2900/1631 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for heating an exhaust system downstream of an internal combustion engine using an electric heating device, comprising the following steps:
ascertaining a current temperature in the exhaust system;
ascertaining a current temperature of the electrical heating device and a fluid mass flow flowing through the electrical heating device;
ascertaining a heating requirement based on the ascertained current temperature in the exhaust system and a target temperature,
calculating a required amount of heat depending on the heating requirement and an amount of energy required for heating 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
controlling the electric heating device to generate the calculated amount of heat.