Granted Patent B1

US 7,516,728 · App. 11/930,944 · Granted Apr 14, 2009

Abstract

Claims (40)

1. A windage tray mountable within a crankcase defined by an engine block of an internal combustion engine and having a first bay and a second bay with at least a third bay disposed between the first and second bay, each having a variable volume containing gas, the internal combustion engine having a crankshaft with a rotational profile and being rotatably supported within the crankcase, the windage tray comprising:

a tray member;

wherein said tray member at least partially defines a passage in communication with the first bay and the non-adjacent second bay; and

wherein said passage is operable to allow gas transfer between the first bay and the second bay to reduce the crankcase fluid pumping losses of the internal combustion engine.

2. The windage tray of claim 1 , wherein said tray member defines a plurality of longitudinally extending slots operable to promote oil drain back within the crankcase.

3. The windage tray of claim 1 , further comprising at least one shield operatively connected to said tray member and operable to engage the engine block to direct oil draining from said engine block substantially away from said crankshaft.

4. The windage tray of claim 1 , further comprising:

a scraper operatively connected to said tray member; and

wherein said scraper is positioned substantially adjacent to the crankshaft when the windage tray is mounted within the crankcase to strip oil from the crankshaft.

5. The windage tray of claim 4 , wherein said scraper is contoured to approximate the rotational profile of the crankshaft.

6. The windage tray of claim 1 , wherein said tray member defines a first orifice operable to enable communication between the first bay and said passage and wherein said tray member defines a second orifice operable to enable communication between the second bay and said passage.

7. An internal combustion engine comprising:

an engine block partially defining a crankcase having a first bay and a second bay with at least a third bay between said first and second bays each containing a gas;

a windage tray mounted within said crankcase;

wherein said windage tray at least partially defines a passage;

wherein said passage is in communication with said first bay and said second bay; and

wherein said passage is operable to enable gas transfer between said first bay and said second bay to reduce the motoring friction of the internal combustion engine.

8. The internal combustion engine of claim 7 , further comprising:

a crankshaft rotatably supported within said crankcase by said engine bock;

a scraper operatively connected to said windage tray and positioned substantially adjacent to said crankshaft; and

wherein said scraper is operable to strip oil from said crankshaft.

9. The internal combustion engine of claim 8 , wherein said scraper is contoured to approximate the rotational profile of said crankshaft.

10. The internal combustion engine of claim 7 , wherein said windage tray defines a plurality of slots extending longitudinally along said tray member and parallel to the axis of rotation of said crankshaft and operable to promote oil drain back within the crankcase.

11. The internal combustion engine of claim 7 , further comprising:

at least one shield operatively connected to said windage tray and operable to engage the engine block to direct oil draining from said engine block substantially away from said crankshaft.

12. The internal combustion engine of claim 7 , wherein said windage tray defines a first orifice operable to enable communication between said first bay and said passage and wherein said windage tray defines a second orifice operable to enable communication between said second bay and said passage.

13. The internal combustion engine of claim 7 , further comprising:

at least one main cap operable to retain said crankshaft with respect to said engine bock;

at least one fastener operable to retain said at least one main cap with respect to said engine block; and

wherein said at least one fastener is operable to mount said windage tray within said crankcase.

14. The internal combustion engine of claim 13 , wherein said at least one fastener includes a stud having a threaded portion engagable by a nut and wherein said windage tray defines a recess operable to substantially receive at least a portion of said nut.

15. A windage tray mountable within a crankcase defined by an engine block of an internal combustion engine and having a first bay and a fourth bay separated by a second and third bay, wherein the first, second, third, and fourth bay each contain a variable volume of gas, the internal combustion engine having a crankshaft with a rotational profile and being rotatably supported within the crankcase and the internal combustion engine having an eight cylinder configuration, the windage tray comprising:

a tray member;

wherein said tray member defines a plurality of slots operable to promote oil drain back within the crankcase;

a scraper operatively connected to said tray member;

wherein said scraper is positioned substantially adjacent to the crankshaft when the windage tray is mounted within the crankcase to strip oil from the crankshaft;

wherein said tray member at least partially defines a passage in communication with the first bay and the fourth bay; and

wherein said passage is operable to allow gas transfer between the first bay and the fourth bay to reduce the motoring friction of the internal combustion engine.

16. The windage tray of claim 15 , wherein said scraper is contoured to approximate the rotational profile of the crankshaft.

17. The windage tray of claim 15 , wherein said tray member defines a first orifice operable to enable communication between the first bay and said passage and wherein said tray member defines a second orifice operable to enable communication between the fourth bay and said passage.

Assignments (12)