US 12,258,915 B2
Engine system
Oscar Garnemark, Torslanda (SE); Ulf Aronsson, Lund (SE); and Fredrik Rahm, Hörby (SE)
Assigned to VOLVO TRUCK CORPORATION, Gothenburg (SE)
Filed by VOLVO TRUCK CORPORATION, Gothenburg (SE)
Filed on Dec. 18, 2023, as Appl. No. 18/543,640.
Claims priority of application No. 22215767 (EP), filed on Dec. 22, 2022.
Prior Publication US 2024/0209807 A1, Jun. 27, 2024
Int. Cl. F02D 41/00 (2006.01); F02B 37/00 (2006.01); F02B 37/007 (2006.01); F02B 37/10 (2006.01); F02B 37/12 (2006.01); F02B 37/16 (2006.01); F02B 39/10 (2006.01); F02D 41/18 (2006.01)
CPC F02D 41/0007 (2013.01) [F02B 37/001 (2013.01); F02B 37/007 (2013.01); F02B 37/10 (2013.01); F02B 37/162 (2019.05); F02B 39/10 (2013.01); F02D 41/18 (2013.01); F02B 2037/122 (2013.01); F02B 2037/125 (2013.01); F05D 2220/40 (2013.01); F05D 2270/101 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An engine system for a vehicle, the engine system comprising:
a first electrically controlled turbo arrangement comprising a first turbine and a first compressor operably connected to each other by a first turbo shaft, wherein the first turbo arrangement comprises a first electric machine configured to control a rotational speed of the first turbo shaft, the first turbine being configured to be arranged in downstream fluid communication with a first exhaust manifold coupled to a first cylinder package of an internal combustion engine,
a second electrically controlled turbo arrangement comprising a second turbine and a second compressor operably connected to each other by a second turbo shaft, wherein the second turbo arrangement comprises a second electric machine configured to control a rotational speed of the second turbo shaft, the second turbine being configured to be arranged in downstream fluid communication with a second exhaust manifold coupled to a second cylinder package of the internal combustion engine and in parallel with the first turbine, wherein the first and second electrically controlled turbo arrangements are individually controllable, and
a control unit comprising a processor device operable to individually control a rotational speed of the first and second electrically controlled turbo arrangements by controlling the first and second electric machines, respectively, the processor device being configured to:
determine a first pressure and a first mass flow of air pressurized by the first compressor, and a second pressure and a second mass flow of air pressurized by the second compressor,
determine a first compressor map position of the air pressurized by the first compressor, the first compressor map position being a position, defined by the first pressure and the first mass flow, within a compressor map, the compressor map defining a surge line, and
control the first electric machine to control the rotational speed of the first electrically controlled turbo arrangement in response to a distance between the first compressor map position and the surge line being below a predetermined threshold distance.