Development of the Multi Locking Hydraulic Variable Valve Timing Control System(VTC) for Hybrid Engines

Paper #:
  • 2014-01-1703

Published:
  • 2014-04-01
DOI:
  • 10.4271/2014-01-1703
Citation:
Shiozawa, K., Ariga, K., Murata, T., Ito, H. et al., "Development of the Multi Locking Hydraulic Variable Valve Timing Control System(VTC) for Hybrid Engines," SAE Int. J. Engines 7(3):1532-1538, 2014, doi:10.4271/2014-01-1703.
Pages:
7
Abstract:
The development of environmental improvement technologies in the automobile industry is underway. These technologies are also developed for internal combustion engines, which remain the mainstream power source for most vehicles. Nissan Motor Company has developed a multi-locking hydraulic VTC (Valve Timing Control) system and adopted it on the newly developed QR25DER engine of the Pathfinder and Infiniti JX hybrid vehicles.The implementation of the developed system allows for an optimized variable valve timing at both, cold engine start, and idle stop re-start from EV mode.This paper describes an outline, the principle, and effects of the multi locking hydraulic VTC system.
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