US 12,392,298 B2
Engine brake method for operating a vehicle with a turbocharged internal combustion engine and associated vehicle
Frank Chagnot Auclair, Saint Anne de Gervonde (FR); Herve Queret, Saint-Just Chaleyssin (FR); and Laurent Bauvir, Lyons (FR)
Assigned to VOLVO TRUCK CORPORATION, Gothenburg (SE)
Filed by VOLVO TRUCK CORPORATION, Gothenburg (SE)
Filed on Aug. 5, 2024, as Appl. No. 18/794,102.
Claims priority of application No. 23191108 (EP), filed on Aug. 11, 2023.
Prior Publication US 2025/0052188 A1, Feb. 13, 2025
Int. Cl. F02D 13/04 (2006.01); F02B 37/22 (2006.01); F02D 9/06 (2006.01); F02D 41/00 (2006.01); F02D 41/14 (2006.01)
CPC F02D 13/04 (2013.01) [F02B 37/22 (2013.01); F02D 9/06 (2013.01); F02D 41/0007 (2013.01); F02D 41/1401 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An engine brake method for operating a vehicle with a turbocharged internal combustion engine, wherein:
the engine comprises:
several cylinders, which are connected to an intake manifold, collecting fresh air, and to an exhaust manifold, collecting exhaust air from the cylinders;
a turbocharger, with a compressor driven by a turbine, the compressor being configured to increase a boost pressure of the fresh air in the intake manifold, while the turbine is configured to be driven by the exhaust air flowing from the exhaust manifold;
a boost pressure regulation device, which is configured to adjust the boost pressure in the intake manifold; and
an exhaust gas restriction device, which is located downstream from the turbine and which is configured to regulate an air exhaust pressure in the exhaust manifold,
the engine brake method comprises a dual phase during which, simultaneously:
the boost pressure regulation device regulates the air exhaust pressure in the exhaust manifold in closed loop, in order to regulate the exhaust pressure to a pre-determined first threshold, and
the exhaust gas restriction device controls the boost pressure in closed loop, in order to regulate the boost pressure to a pre-determined second threshold.