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Core For Cast Crankshaft

A crankshaft and journal technology, applied in the field of core structure, can solve the problems of reduced mass and low quality

Active Publication Date: 2016-03-30
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, it would be desirable to provide a lower mass crankshaft with more mass reduction than machining methods with only limited ability to remove material from the crankshaft to form the hollow

Method used

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  • Core For Cast Crankshaft
  • Core For Cast Crankshaft
  • Core For Cast Crankshaft

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Embodiment Construction

[0016] Exemplary embodiments will now be described more fully with reference to the accompanying drawings.

[0017] Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope of the invention to those skilled in the art. Numerous specific details are disclosed, such as examples of specific components, devices, and methods, to provide a thorough understanding of embodiments of the invention. It should be understood by those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms, and that neither such specific details nor the example embodiments should be construed to limit the scope of the invention. scope. In some exemplary embodiments, known process flows, known equipment structures and known technologies will not be described in detail.

[0018] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not ...

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PUM

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Abstract

A core structure for a cast crankshaft is provided which eliminates the need to machine and install plugs in one or more of the main bearing lightening holes. This is achieved by configuring the core structure to take out all but a thin wall of material in the center of the main bearing journals.

Description

technical field [0001] The invention relates to a core structure for casting crankshafts. Background technique [0002] This section provides background information related to the present disclosure which is not necessarily prior art. [0003] Typical practice for engine dry sump lubrication systems at high RPM (8000RPM+) and high performance is to have multiple separate crankcase compartments to prevent compartment-to-compartment pumping losses. To do this on the main journals which have been formed hollow to reduce weight, the machined holes in the main journals need to be plugged to prevent compartment to compartment pumping. [0004] It would be desirable in the art to provide crankshafts that do not require such additional machining and plugging operations. In addition, it would be desirable to provide a lower mass crankshaft with more mass reduction than machining methods that have only limited ability to remove material from the crankshaft to form the hollow. Cont...

Claims

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Application Information

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IPC IPC(8): B22C9/10
CPCB22C9/103B22C9/108B22C9/10F16C3/08F16C2220/02
Inventor R.M.特卡奇E.R.罗姆布隆
Owner GM GLOBAL TECH OPERATIONS LLC