Racing engine having trimetal bearings with a thick overlay for high speed and/or high load applications
AssigneeDana Corporation
InventorJohn F. Havel
Life of this patent
Estimating the term…
Abstract
A racing engine is provided for use in extremely high speed and/or high load applications such as drag racing. The engine includes an engine block and a crankshaft disposed within the engine block. The engine also includes a bearing disposed about and rotatably journalling the crankshaft. The bearing is of the trimetal type and has a steel backing layer, an intermediate layer, and an overlay layer. In accordance with the present invention, the overlay layer has a thickness of at least 38 μm (0.0015 inches), and preferably about 51 μm (0.002 inches).
Claims14
A drag racing engine, comprising:
- an engine block;
- a crankshaft disposed within said engine block;
- and,
- a bearing disposed about said crankshaft, said bearing including:
- a backing layer;
- an intermediate layer having a first side adjacent to said backing layer;
- and,
- an overlay layer disposed on a second side of said intermediate layer, said overlay layer having a thickness of at least 38 μm.
A drag racing engine, comprising:
- an engine block;
- a crankshaft disposed within said engine block;
- and,
- a bearing disposed about said crankshaft, said bearing including:
- a backing layer;
- an intermediate layer having a first side adjacent to said backing layer;
- and,
- an overlay layer disposed on a second side of said intermediate layer, said overlay layer having a thickness of at least 38 μm, said overlay layer having about 5-7% indium by weight with the remainder being lead.
A drag racing engine, comprising:
- an engine block;
- a crankshaft disposed within said engine block;
- and,
- a bearing disposed about said crankshaft, said bearing including:
- a backing layer;
- an intermediate layer having a first side adjacent to said backing layer;
- and,
- an overlay layer disposed on a second side of said intermediate layer, said overlay layer having a thickness of about 51 μm
- wherein said engine is configured to operate under at least one of a speed of at least 4500 rpm and a bearing load of at least 6000 psi.
Dependencies are inferred from the claim text.