Internal combustion engine having cylinder block with cast-in oil pump inlet and outlet passages
AssigneeCaterpillar Inc.
InventorsAllen Yao Chen, Thomas Lee Atwell, Jason Lee Van Farowe, Daniel Halvorson, Neil Edward Johnston, Aaron G. Heintz
Life of this patent
Estimating the term…
Abstract
An internal combustion engine includes a one-piece cylinder block casting, a flywheel supported for rotation at a front block end, and a back gear train supported for rotation at a back block end. Cast-in pump inlet and outlet passages are formed in the cylinder block casting and open in a pump mounting face at the back block end. An oil pump is clamped to the pump mounting face and includes a pump inlet and a pump outlet fluidly connected, respectively, to the cast-in pump inlet passage and the cast-in pump outlet passage.
Claims20
An internal combustion engine comprising:
- a cylinder block casting having a plurality of cylinders formed therein, the plurality of cylinders extending between a top deck surface and a bottom block surface, and arranged between a front block end, and a back block end having a pump mounting face;
- a flywheel supported for rotation at the front block end;
- a back gear train supported for rotation at the back block end and including a pump gear;
- a cast-in pump inlet passage formed in the cylinder block casting and opening in the pump mounting face;
- a cast-in pump outlet passage formed in the cylinder block casting and opening in the pump mounting face;
- an oil pump clamped to the pump mounting face and including a pump inlet and a pump outlet fluidly connected, respectively, to the cast-in pump inlet passage and the cast-in pump outlet passage;
- and
- the pump mounting face includes a compound pump mounting face having a machined inlet surface and a machined outlet surface, and the pump inlet passage and the pump outlet passage open, respectively, in the machined inlet surface and the machined outlet surface.
A cylinder block for an internal combustion engine:
- a one-piece cylinder block casting having a plurality of cylinders formed therein, the plurality of cylinders extending between a top deck surface and a bottom block surface, and arranged between a front block end, and a back block end having a pump mounting face;
- a cast-in pump inlet passage formed in the one-piece cylinder block casting and extending forwardly and downwardly from the pump mounting face to the bottom block surface;
- and
- a cast-in pump outlet passage formed in the one-piece cylinder block casting and extending forwardly from the pump mounting face.
A cylinder block for an internal combustion engine comprising:
- a one-piece cylinder block casting having a top deck surface, a bottom block surface, a front block end, and a back block end;
- the one-piece cylinder block casting further having a plurality of cylinders formed therein and each extending between the top deck surface and the bottom block surface;
- the one-piece cylinder block casting further including a pump mounting face formed on the back block end, and each of an oil inlet opening and an oil outlet opening formed in the pump mounting face;
- the one-piece cylinder block casting further including an oil module side face located between the front block end and the back block end;
- a cast-in pump inlet passage extends through the one-piece cylinder block casting from the oil inlet opening to the bottom block surface;
- and
- a cast-in pump outlet passage extends through the one-piece cylinder block casting from the oil outlet opening to the oil module side face.
Dependencies are inferred from the claim text.