Structural frame

1. A structural frame, comprising:

a bottom surface;

an oil filter port;

first and second cylinder block sidewall engaging surfaces;

the first and second cylinder block sidewall engaging surfaces positioned above the bottom surface at a height that is above a centerline of a crankshaft support included in a cylinder block when the structural frame is coupled to the cylinder block; and

the cylinder block sidewall engaging surfaces positioned at a top of the structural frame.

2. The structural frame of claim 1 , where an oil pan engaging surface is the bottom surface of the structural frame.

3. The structural frame of claim 1 , further comprising a plurality of fastener openings along the length of the first and second cylinder block sidewall engaging surfaces.

4. The structural frame of claim 1 , where the structural frame is constructed of a material having a strength to volume ratio less than a strength to volume ratio of an engine block, when the structural frame is coupled to the engine block.

5. The structural frame of claim 1 , where the first and second cylinder block sidewall engaging surfaces are positioned on opposite sides of the structural frame.

6. The structural frame of claim 1 , where first and second cylinder block sidewall engaging surfaces are part of first and second structural frame sidewalls; the first and second structural frame sidewalls including stiffening webbing.

7. The structural frame of claim 1 , further comprising a transmission bell housing engaging surface.

8. A structural frame, comprising:

an oil pan engaging surface;

first and second cylinder block sidewall engaging surfaces;

the first and second cylinder block sidewall engaging surfaces positioned above the oil pan engaging surface at a height that is above a centerline of a crankshaft when the structural frame is coupled to an engine block;

an oil pump pick-up;

and a oil filter; and

the cylinder block sidewall engaging surfaces positioned at a top of the structural frame.

9. The structural frame of claim 8 , where the structural frame is constructed of a material having a strength to volume ratio less than a strength to volume ratio of an engine block, when the structural frame is coupled to the engine block.

10. The structural frame of claim 8 , where the structural frame is part of a sidewall of a cylinder block assembly when the structural frame is coupled to the engine block.

11. The structural frame of claim 8 , further comprising a transmission bell housing engaging surface.

12. The structural frame of claim 11 , where the structural frame isolates at least a portion of an interior of an engine from a transmission when the structural frame is coupled to an engine block and a transmission.

13. The structural frame of claim 12 , further comprising a rear cover engaging surface.

14. The structural frame of claim 11 , wherein the first and second cylinder block sidewall engaging surfaces are included in a first and second structural frame exterior sidewall and supports laterally extend from the first structural frame exterior sidewall to the second structural frame exterior sidewall.

15. A structural frame comprising:

a cylinder block having a crankshaft opening with a centerline;

a structural frame coupled to the cylinder block;

the frame including an oil pan engaging surface, first and second cylinder block sidewall engaging surfaces, the first and second cylinder block sidewall engaging surfaces positioned above the oil pan engaging surface at a height that is above the centerline structural frame, at least one sensor mounting boss, and at least one fastener opening positioned to receive a fastener coupling the structural frame to a bearing cap.

16. The structural frame of claim 15 , where two fastener openings are positioned within the structural frame to receive two fasteners coupling the structural frame to a bearing cap.

17. The structural frame of claim 15 , further comprising an engine front cover engaging surface.

18. The structural frame of claim 15 , further comprising an engine oil cooler mounting boss.

19. The structural frame of claim 15 , further comprising supports extending laterally from a first structural frame exterior sidewall to a second structural frame exterior sidewall.