A REVIEW STUDY ON VARIABLE VALVE TIMING SYSTEMS

Authors

  • Aniruddha Joshi Student, Department of Mechanical Sandwich Engineering,Indira College of Engineering and Management, Pune.
  • Prof. Puspendra Upadhyay Assistant Professor, Department of Mechanical Engineering,Indira College of Engineering and Management, Pune.

Keywords:

variable valve timing,, compression ratio, valve overlap, SI engines

Abstract

Variable valve timing(VVT)is the process of alternating Timing of a valve liftevent. In internal combustion engines particularly for spark ignition (SI) engines, valve events and their timings have a major influence onthe engine’s overall efficiency and its exhaust emissions Because the conventional SIengine has fixed timing and synchronization between the camshaft and crankshaft, a compromise results between engine efficiency, performance and its maximum power. By using variable valve timing (VVT) technology it is possible to control the valve lift, phase, and valve timing at any point on the engine map, with the result of enhancing the overall engine performance. During the last two decades, remarkable developments have been seen in the field of VVT. This paper reviews theliterature in the technology of intake and exhaust philosophies of VVT and their effects on the pressure–volume (P.V.) cycle of the engine.

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Published

2021-03-27

Issue

2018: i – MESCON 18

Section

Articles

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