Invention Grant
- Patent Title: Valve lifter and surface treatment method thereof
- Patent Title (中): 气门挺杆及其表面处理方法
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Application No.: US12291120Application Date: 2008-11-05
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Publication No.: US08109248B2Publication Date: 2012-02-07
- Inventor: In Woong Lyo , Sung Moom Choi , Woong Kim , Jeong Uk An , Hyung Ick Kim , Seung Gyun Ahn , Hong Kil Baek , Jin Won Jung
- Applicant: In Woong Lyo , Sung Moom Choi , Woong Kim , Jeong Uk An , Hyung Ick Kim , Seung Gyun Ahn , Hong Kil Baek , Jin Won Jung
- Applicant Address: KR Seoul
- Assignee: Hyundai Motor Company,Kia Motors Corporation
- Current Assignee: Hyundai Motor Company,Kia Motors Corporation
- Current Assignee Address: KR Seoul
- Agency: Edwards Wildman Palmer LLP
- Agent Peter F. Corless
- Priority: KR10-2008-0070306 20080718
- Main IPC: F01L1/14
- IPC: F01L1/14
Abstract:
The present invention provides a valve lifter, including a buffer layer, a Me diamond-like carbon layer having a thickness of 0.3˜0.6 μm, and a diamond-like carbon layer having a thickness of 1˜1.5 μm and a SP3 bonding fraction of 60˜70%, which are sequentially formed on a base body which is subjected to carbonitriding treatment. The valve lifter can exhibit superior low-friction characteristics and wear resistance.
Public/Granted literature
- US20100012064A1 Valve lifter and surface treatment method thereof Public/Granted day:2010-01-21
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