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The Variable Rocker-Arm Mechanism

[+] Author Affiliations
Madhusudan Raghavan

General Motors R&D Center, Warren, MI

Paper No. DETC2005-85150, pp. 359-366; 8 pages
  • ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 7: 29th Mechanisms and Robotics Conference, Parts A and B
  • Long Beach, California, USA, September 24–28, 2005
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 0-7918-4744-6 | eISBN: 0-7918-3766-1
  • Copyright © 2005 by ASME


We present an investigation of a novel variable valve-lift mechanism known as the Variable Rocker-Arm mechanism (VR-Arm, for short). This mechanism has simple construction, low friction due to rolling contact, and provides continuously variable lift. Dynamic analysis of the mechanism using ADAMS shows that frictional losses at the intake camshaft are of the order of 1 Newton-meter for a four-cylinder engine.

Copyright © 2005 by ASME
Topics: Mechanisms



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