System and method of making a crankshaft with alternate materials
A crankshaft for an internal combustion engine is provided. The crankshaft comprises at least four main journals aligned on a crankshaft axis of rotation defining a centerline. The crankshaft further comprises at least three pin journals. Each pin journal is disposed about a respective pin journal axis and positioned between the main journals. Each of the pin journals is joined to a pair of crank arms. Each pair of crank arms is joined to a respective main journal. Each of the main journals, pin journals, and crank arms is made of a first metallic material. Each crank arm has an over-molded counterweight metallurgically bonded thereto. Each counterweight is disposed opposite a respective pin journal relative to the centerline for balance and stability. Each counterweight is made of a second metallic material. The crankshaft has a weight ratio of the second metallic material to the first metallic material of between 0.20 to 0.50.
- Research Organization:
- GM Global Technology Operations, LLC, Detroit, MI (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EE0008877
- Assignee:
- GM Global Technology Operations LLC (Detroit, MI)
- Patent Number(s):
- 11,619,255
- Application Number:
- 17/698,410
- OSTI ID:
- 1998258
- Country of Publication:
- United States
- Language:
- English
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