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Applicant:
Indian Institute of Technology (IIT) Madras 
Title:
System for varying valve lift and duration 
Inventor(s):
Dr. A Ramesh, Mr. Arun Vinayak 
Applicant:
Indian Institute of Technology (IIT) Madras 
Application type:
Granted - 2019-07-31 
Application Number:
317361 
Applied at:
India 
Entered by:
Indian Institute of Technology (IIT) Madras 
Abstract:
A system for varying valve lift and duration in an automobile engine is provided. The system includes a guide, a slider, a rocker, a connecting rod and an oscillating cam. The slider is connected with rocker and the slider slides in the guide and one end of rocker is in contact with a primary cam follower and other end of rocker is connected with connecting rod. The slider provides sliding motion to the rocker. The oscillating cam is connected with connecting rod, and placed above a valve stem which operates the valve. The connecting rod provides oscillating motion to the oscillating cam. The oscillating motion of the oscillating cam varies the lift and duration of the valve and the range of oscillation of said oscillating cam is governed by the relative positioning of slider with rocker and contact point between primary cam follower and one end of rocker.  

 
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