Low noise level internal combustion engine
Cylinder block of internal combustion engine
Reinforcement of engine blocks
Crankshaft bearings for internal-combustion engines Patent #: 4693216
ApplicationNo. 245175 filed on 05/17/1994
US Classes:384/432, Block and cap type123/195R, FRAME CONSTRUCTION384/279, Porous metal384/434Block and cap type
ExaminersPrimary: Hannon, Thomas R.
Attorney, Agent or Firm
Foreign Patent References
International ClassesF16C 035/00
AbstractA bearing insert for being cast into an aluminum alloy engine block is made by a ferrous powder metal sintering process to make a skeleton structure which is permeable to the molten aluminum alloy in the block casting process. The insert is made of a material having a similar composition as the bearing cap so as to equalize machining and thermal expansion properties of the cap and block so as to provide improved roundness of the bearing in the machining operations for forming the bearing support and in operation of the engine.