Exhaust leakage management

Patent metadata

Field	Value
Publication number	US-9103271-B2
Application number	US-201313857045-A
Country	US
Kind code	B2
Filing date	Apr 4, 2013
Priority date	Apr 4, 2013
Publication date	Aug 11, 2015
Grant date	Aug 11, 2015

Abstract

Embodiments may provide an exhaust gas management arrangement for an engine. The exhaust gas management arrangement may include a port disposed to capture an exhaust gas leaked from a movable portion of an exhaust gas flow directing mechanism. The arrangement may also include a passage to direct the leaked exhaust gas to a crankcase of the engine.

First claim

The invention claimed is:

1. An exhaust gas management arrangement for an engine comprising:
a port disposed to capture an exhaust gas leaked from a movable portion of an exhaust gas flow directing mechanism,
the movable portion being disposed within a pair of bushings and the port including an enclosure in sealing engagement with the exhaust gas flow directing mechanism and defining a volume around the bushings; and
a passage to direct the leaked exhaust gas to an engine crankcase, and
wherein the passage is fluidically coupled with the crankcase via a breather passage of positive crankcase ventilation (PCV) system.

2. The exhaust gas management arrangement of claim 1 , wherein the gas leak is from a turbocharger wastegate.

3. The exhaust gas management arrangement of claim 1 , wherein the exhaust gas flow directing mechanism is a turbocharger wastegate.

4. The exhaust gas management arrangement of claim 1 , wherein the passage is fluidically coupled with the crankcase via an oil return line for a bearing of a turbocharger.

5. The exhaust gas management arrangement of claim 1 , wherein the passage is fluidically coupled with the crankcase via a cam cover.

6. The exhaust gas management arrangement of claim 1 , wherein the passage is fluidically coupled with the crankcase via a cylinder head.

7. The exhaust gas management arrangement of claim 1 , wherein the movable portion is a rod disposed for movement within the pair of bushings, the passage including a groove intersecting with the rod between the bushings.

8. The exhaust gas management arrangement of claim 1 , wherein the port is the enclosure in sealing engagement with the exhaust gas flow directing mechanism and defines a volume around a leak possible portion of the exhaust gas flow directing mechanism.

9. A turbocharger wastegate for an engine comprising:
an enclosure in sealing engagement with a leakage possible portion of the wastegate; and
a fluid path from the enclosure to a positive crankcase ventilation (PCV) system to move exhaust gas leaked from the wastegate to a crankcase of the engine wherein the fluid path includes an oil return line for a bearing of a turbocharger.

10. The turbocharger wastegate of claim 9 , wherein the leakage possible portion of the wastegate is a rod disposed within a bushing to transmit movement from an actuator to a valve.

11. The turbocharger wastegate of claim 10 , wherein the rod is actuated by a lever.

12. The turbocharger wastegate of claim 10 , wherein the rod is actuated by a diaphragm.

13. The turbocharger wastegate of claim 10 , wherein the fluid path is a groove disposed to intersect with the rod.

14. The turbocharger wastegate of claim 10 , wherein the fluid path includes a gap between two portions of the bushing.

15. The turbocharger wastegate of claim 9 , further comprising two bushings having a space therebetween a rod disposed for translational movement within the two bushings, the fluid path including a groove in line with the space between the bushings and disposed to intersect with the rod.

16. A turbocharger wastegate for an engine comprising:
an enclosure in sealing engagement with a leakage possible portion of the wastegate and in fluidic communication with a crankcase of the engine, wherein the enclosure is in fluid communication with a positive crankcase ventilation system via a turbocharger bearing oil return line.

Assignees

• Ford Global Tech Llc

Inventors

• Bidner David Karl
• House Christopher
• Stateler Chad

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F02B39/14

  Lubrication of pumps; Safety measures therefor · CPC title

• F02B37/183 Primary

  Arrangements of bypass valves or actuators therefor · CPC title

• F01M13/00

  Crankcase ventilating or breathing · CPC title

• Y02T10/144

  Cross-Sectional Technologies · mapped topic