Pressure wave supercharger cooling system and method
AssigneeAntrova AG
InventorMario Skopil
Life of this patent
Estimating the term…
Abstract
A pressure wave supercharger for compressing fresh air for an internal combustion engine includes a cold gas housing, a hot gas housing, and a rotor casing inside which a rotatable cell rotor is disposed. The hot gas housing has a high-pressure exhaust gas duct and a low-pressure exhaust gas duct, while the cold gas housing has a fresh air duct and a charge air duct. The high-pressure exhaust gas duct, the low-pressure exhaust gas duct, the fresh air duct and the charge air duct are fluidically connected to the cell rotor. The hot gas housing has a heat exchanger which is designed in such a way that at least a first bearing for a rotor shaft can be cooled.
Claims19
A pressure wave supercharger for compressing fresh air for an internal combustion engine, comprising:
- a cold gas housing, a hot gas housing, and a rotor casing, which is arranged therebetween;
- wherein a rotatable cell rotor is arranged within the rotor casing;
- wherein the hot gas housing includes a high-pressure exhaust duct and a low-pressure exhaust duct;
- wherein the cold gas housing includes a fresh air duct and a charge air duct;
- wherein the high-pressure exhaust duct, the low-pressure exhaust duct, the fresh air duct and the charge air duct are fluidically connected to the cell rotor;
- wherein the hot gas housing includes a first bearing, and the cold gas housing includes a second bearing;
- wherein the cell rotor comprises a rotor shaft, which is mounted in the first and second bearings;
- the rotor casing is an integral tubular barrel casing, which is connected to the hot gas housing and the cold gas housing;
- the hot gas housing includes a heat exchanger for cooling at least the first bearing;
- wherein the heat exchanger has cooling ducts, which extend within the hot gas housing;
- wherein the hot gas housing comprises a bearing seat wall, which, on the side facing the first bearing, has a bearing seat of the first bearing, wherein the first bearing is arranged in the bearing seat, and, on a side facing away from the first bearing, the bearing seat wall forms part of a cooling duct outer wall of a cooling duct of the heat exchanger;
- wherein the bearing seat wall has an end and, starting from the end, a bearing section in the form of a hollow cylinder, wherein the end and the bearing sections forms the bearing seat, and wherein both the end and the bearing section are in the form of a hollow cylinder and form part of the cooling duct outer wall;
- and
- wherein the end and the bearing section surround an axial end of the first bearing on three sides.
A method for operating a pressure wave supercharger for compressing fresh air for an internal combustion engine, wherein the pressure wave supercharger having:
- a cold gas housing, a hot gas housing, and a rotor casing, which is arranged therebetween, wherein a rotatable cell rotor is arranged within the rotor casing, the hot gas housing including a high-pressure exhaust duct and a low-pressure exhaust duct, the cell rotor being supported by a first bearing and by a second bearing arranged in the cold gas housing, the hot gas housing being cooled by a heat exchanger so that that the first bearing is cooled by arranged in a bearing seat and the bearing seat is cooled externally by a cooling liquid;
- a temperature sensor in the high-pressure exhaust duct;
- and
- the method comprising:
- measuring a temperature in the high-pressure exhaust duct via the temperature sensor;
- changing the cooling capacity of the heat exchanger in response to the temperature measured in the high-pressure exhaust duct;
- reducing the cooling capacity of the heat exchanger during a cold start until the pressure wave supercharger reaches a minimum temperature (Tmin), and
- increasing the cooling capacity of the heat exchanger to cool the first bearing in the hot gas housing.
A pressure wave supercharger for compressing fresh air for an internal combustion engine, comprising:
- a cold gas housing, a hot gas housing, and a rotor casing, which is arranged therebetween;
- wherein a rotatable cell rotor is arranged within the rotor casing;
- wherein the hot gas housing comprises a high-pressure exhaust duct and a low-pressure exhaust duct;
- wherein the cold gas housing includes a fresh air duct and a charge air duct;
- wherein the high-pressure exhaust duct, the low-pressure exhaust duct, the fresh air duct and the charge air duct are fluidically connected to the cell rotor;
- wherein the hot gas housing includes a first bearing, and the cold gas housing includes a second bearing;
- wherein the cell rotor comprises a rotor shaft, which is mounted in the first and second bearings;
- the rotor casing is an integral tubular barrel casing, which is connected to the hot gas housing and the cold gas housing;
- the hot gas housing includes a heat exchanger for cooling at least the first bearing;
- wherein the heat exchanger has cooling ducts, which extend within the hot gas housing;
- and
- wherein an additional heat exchanger cools a high-pressure exhaust feed line;
- wherein the high-pressure exhaust feed line is arranged upstream of the high-pressure exhaust duct in the exhaust gas flow direction.
Dependencies are inferred from the claim text.