Title:
METHOD OF RETROFITTING AND ACTUATING VARIABLE PROFILE CAM FOR CONTROLLING LIFT AND TIMING OF ENGINE VALVES
Document Type and Number:
WIPO Patent Application WO/2015/177810
Kind Code:
A3
Abstract:
The invention proposed here involves fitting an axially sliding cam surface of any desired cam profile over the existing cam surface. Depending on its axial location, the sliding cam surface presents different cam profiles to the follower. The axial location of the sliding cam is changed according to the engine speed. The changing profile of the cam surface results in variable timing and lift of the valves. It is also proposed that the actuation of axial movement of the sliding cam surface be performed using a rotary governor fitted over the camshaft with an appropriate linking mechanism. The angular velocity of the camshaft actuates the radial displacement of the governor which in turn actuates the sliding cam surface.
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Inventors:
SRIKANTH VEDANTAM (IN)
PRATYUSH GARG (IN)
ANAND THIRUMALAI NALLAN CHAKRAVARTHY (IN)
PRATYUSH GARG (IN)
ANAND THIRUMALAI NALLAN CHAKRAVARTHY (IN)
Application Number:
PCT/IN2015/000212
Publication Date:
January 21, 2016
Filing Date:
May 19, 2015
Export Citation:
Assignee:
INDIAN INST TECHNOLOGY MADRAS (IN)
International Classes:
F01L1/04
Foreign References:
| US8033261B1 | 2011-10-11 | |||
| US4714057A | 1987-12-22 |
Attorney, Agent or Firm:
BRINDA MOHAN (D-4 IIIRD Floor, Ceebros Building,,New No. 32, , Cenotaph Road,,Teynampet, Chennai - 8, State of Tamil Nadu, IN)
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