US 12,264,683 B2
Method for controlling an electrically supported exhaust gas turbocharger
Rainer Weigand, Ludwigsburg (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Sep. 30, 2020, as Appl. No. 17/038,487.
Claims priority of application No. 102019215310.0 (DE), filed on Oct. 7, 2019.
Prior Publication US 2021/0102545 A1, Apr. 8, 2021
Int. Cl. F04D 27/00 (2006.01); F02B 37/18 (2006.01); F02B 37/24 (2006.01); F02D 23/00 (2006.01); F04D 25/06 (2006.01)
CPC F04D 27/002 (2013.01) [F02B 37/18 (2013.01); F02B 37/24 (2013.01); F02D 23/00 (2013.01); F04D 25/06 (2013.01); F04D 27/004 (2013.01); F05D 2220/40 (2013.01); F05D 2270/62 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for controlling an electrically supported exhaust gas turbocharger, comprising the following steps:
ascertaining a monitored effective turbine area in a monitoring path for the electrically supported exhaust gas turbocharger;
ascertaining a planned effective turbine area in a planned controlling path;
ascertaining a correction signal for the electrically supported exhaust gas turbocharger as a function of a difference between the planned effective turbine area and the monitored effective turbine area;
(i) controlling an actuator as a function of the planned effective turbine area, and/or (ii) activating an electric machine for controlling the electrically supported exhaust gas turbocharger, for a supporting operation corresponding to a boost mode of the electrically supported exhaust gas turbocharger;
taking a mechanical driving power from an exhaust gas turbine until the taking of the mechanical driving power is restricted by component protection limits;
for a recuperative operation of the electrically supported exhaust gas turbocharger, determining a difference between a maximally possible turbine power and a planned compressor power by taking into account the component protection limits;
restricting a maximally possible extracted recuperative power for obtaining electrical energy to the difference between the maximally possible turbine power and the planned compressor power; and
ascertaining the maximally possible turbine power as a function of a minimal turbine area and/or an exhaust gas back pressure and/or an exhaust gas mass flow.