Supercharged internal combustion engine with turbine which can be liquid-cooled, and method for controlling the cooling of said turbine

Patent metadata

Field	Value
Publication number	US-10273866-B2
Application number	US-201514831670-A
Country	US
Kind code	B2
Filing date	Aug 20, 2015
Priority date	Sep 16, 2014
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

A method for operating an engine system in an internal combustion engine comprising during a first operating condition, circulating coolant through a coolant jacket in a turbine housing at least partially enclosing a turbine rotor and during a second operating condition, replacing coolant in the coolant jacket with air from a venting reservoir.

First claim

The invention claimed is:

1. A supercharged internal combustion engine comprising:
a cylinder head with at least two cylinders;
coolant passages for the cylinder head;
at least one turbine in an exhaust-gas turbocharger in which:
each cylinder of the at least two cylinders has at least one respective outlet opening for discharging exhaust gases out of each of the at least two cylinders and each of the at least one respective outlet opening is adjoined by an exhaust line, the exhaust lines merging to form at least one overall exhaust line, the at least one overall exhaust line opens into the at least one turbine, which has a turbine housing and which has a flow duct which conducts exhaust gas through the turbine housing; and
the at least one turbine has at least one coolant jacket, which is integrated in the turbine housing;
wherein the at least one coolant jacket is connectable to the coolant passages;
the at least one coolant jacket and a venting reservoir which can be filled with air and coolant are arranged in a secondary circuit, which is separate from the coolant passages;
the venting reservoir is connectable to the at least one coolant jacket via a vent line, the vent line conducts air to the at least one coolant jacket of the turbine housing via a first port and is closable by a first shut-off valve;
a pump is provided in a return line, the return line conducts coolant and connects the at least one coolant jacket to the venting reservoir via a second port; and
a bypass line that conducts coolant and connects the venting reservoir to the at least one coolant jacket of the turbine housing via the second port.

2. The supercharged internal combustion engine of claim 1 , wherein the bypass line branches off from the return line downstream of the pump and loins the return line upstream of the pump, forming a first junction point, a junction shut-off valve opens either the return line or the bypass line or shuts off the return line and the bypass line.

3. The supercharged internal combustion engine of claim 2 , wherein the function shut-off valve, which is a 3/2-way valve, is arranged at the first junction point and which is connected to the second port of the at least one coolant jacket, to the return line and to the bypass line.

4. The supercharged internal combustion engine of claim 1 , wherein a second shut-off valve is arranged in the bypass line and a third shut-off valve is arranged in the return line.

5. The supercharged internal combustion engine in claim 1 , wherein the first port of the at least one coolant jacket is situated at a geodetically higher point than the second port of the at least one coolant jacket.

6. The supercharged internal combustion engine of claim 1 , wherein the venting reservoir is situated at a geodetically higher point than the first port of the at least one coolant jacket.

7. The supercharged internal combustion engine of claim 1 , wherein the at least one coolant jacket is at least connectable to the coolant passages of the internal combustion engine via a supply opening and via a discharge opening.

8. The supercharged internal combustion engine of claim 7 , wherein, on an inlet side, a second shut-off valve opens or shuts off the supply opening, and a third shut-off valve opens or shuts off the discharge opening on an outlet side.

9. The supercharged internal combustion engine of claim 1 , wherein the exhaust lines merge to form the at least one overall exhaust line within the cylinder head.

10. The supercharged internal combustion engine of claim 7 , wherein the at least one coolant jacket is integrated in the cylinder head.

11. The supercharged internal combustion engine of claim 10 , wherein the cylinder head can be connected to a cylinder block, and the at least one coolant jacket has a lower coolant jacket and an upper coolant jacket.

12. The supercharged internal combustion engine of claim 11 , wherein the upper coolant jacket is connectable to the supply opening and the lower coolant jacket is connectable to the discharge opening.

13. The supercharged internal combustion engine of claim 11 , wherein the upper coolant jacket is connectable to the discharge opening and the lower coolant jacket is connectable to the supply opening.

14. A method for controlling the cooling of at least one turbine:
the at least one turbine including at least one coolant jackets;
opening a return valve in a return line when the at least one coolant jacket is filled with coolant and is separated from coolant passages of a cylinder head;
activating a pump to convey coolant out of the at least one coolant jacket into a venting reservoir;
opening a first shut-off valve in a vent line to connect the venting reservoir to the at least one coolant jacket via the vent line and a first port; and
closing the return valve in the return line and the first shut-off valve in the vent line; and
deactivating the pump when a predetermined quantity of coolant has been conveyed out of the at least one coolant jacket and replaced with air.

15. The method of claim 14 , further comprising
opening a bypass valve in a bypass line to enable coolant to pass from the venting reservoir into the at least one coolant jacked under the action of gravity when the at least one coolant jacket is separated from the coolant passages;
opening the first shut-off valve to connect the venting reservoir to the at least one coolant jacket via a vent line and the first port to enable air to escape from the at least one coolant jacket into the venting reservoir; and
closing the bypass valve in the bypass line and the first shut-off valve in the vent line when a predetermined amount of coolant has been introduced into the at least one coolant jacket.

16. The method of claim 15 , where the at least one coolant jacket is filled with coolant during certain operating conditions and is connected to the coolant passages by a supply opening and a discharge opening being opened.

17. A method for operating an engine system in an engine comprising:
during a first operating condition, circulating coolant through a coolant jacket in a turbine housing at least partially enclosing a turbine rotor; and
during a second operating condition, replacing coolant in the coolant jacket with air from a venting reservoir.

18. The method of claim 17 , where the first operating condition is when the engine is above a threshold temperature and the second operating condition is when the engine is below the threshold temperature.

19. The method of claim 17 , where the venting reservoir is positioned vertically above the coolant jacket.

20. The method of claim 17 , further comprising adjusting operation of a pump positioned in a return line coupled to the venting reservoir and the coolant jacket based on turbine temperature.

Assignees

• Ford Global Tech Llc

Inventors

• Kindl Helmut Matthias
• Smiljanovski Vanco
• Kuske Andreas
• Sommerhoff Franz Arnd
• Forsting Michael
• Kemmerling Joerg

Classifications

• F05D2220/40

  in turbochargers · CPC title

• F01P2007/146

  using valves · CPC title

• F01N3/043

  without contact between liquid and exhaust gases · CPC title

• F01P2060/12

  Turbo charger · CPC title

• F02C7/16

  characterised by cooling medium · CPC title