REVIEW ON CRITICAL SPEED IMPROVEMENT IN SINGLE CYLINDER ENGINE VALVE TRAIN

Authors

  • Sagar Gade Department of Mechanical Engineering, Pravara Rural Engineering College , Loni, Savitribai Phule Pune University, India
  • R. R. Kharde Department of Mechanical Engineering, Pravara Rural Engineering College , Loni, Savitribai Phule Pune University, India
  • Jagrit Shrivas Sr. Manager-R & D, Greaves Cotton Limited, Aurangabad

Keywords:

Computer Aided Engineering, ADAMS,, Stiffness,, Valve Spring

Abstract

The purpose of valve train is to operate the inlet and outlet valves of the engine. The valve train mainly consists of rocker arm, push rod, cam, poppet valve and spring for keep the valves closed position. The Greaves G400WG engine valve train is operated at the maximum speed of 3600 rpm. The main objective of this project is to improve the valve train speed up to safe speed limit that is up to 5000 rpm. The valve spring parameters are optimized based on space availability, stress limit, stiffness, buckling of pushrod and natural frequency of the system. The optimized valve spring configuration is used in the push rod type valve train and the valve train dynamics for different engine speed is studied using commercially available multi-body dynamic ADMAS software. A comparative valve train dynamics analysis is also carried out with the existing and optimized valve spring combinations. It is observed that valve jump engine speed with respect to optimized valve spring is enhanced to considerable amount when compared to the existing valve spring configuration. Design improvements include detail study on following topics: 1.Valve Spring Stiffness. 2.Push rod buckling. 3.Valve closing Velocity. 4.Contact stress between cam and follower

Published

2021-03-27

Issue

2015: ICITDCEME

Section

Articles

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