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Development of Variable Valve Timing System Controlled by Electric Motor

Journal Article
2008-01-1358
ISSN: 1946-3936, e-ISSN: 1946-3944
DOI: https://doi.org/10.4271/2008-01-1358
Published April 14, 2008 by SAE International in United States
Development of Variable Valve Timing System Controlled by Electric Motor
Sector:
Citation: Hattori, M., Inoue, T., Mashiki, Z., Takenaka, A. et al., "Development of Variable Valve Timing System Controlled by Electric Motor," SAE Int. J. Engines 1(1):985-990, 2009, https://doi.org/10.4271/2008-01-1358.
Language: English

Abstract:

To meet the requirements for lower fuel consumption and emissions as well as higher performances, a “Variable Valve Timing - intelligent by Electric motor (VVT-iE)” system has been newly developed. The system has been firstly adopted to the intake valve train of the Toyota's new 4.6 and 5.0 litter V8 SI engine series. The VVT-iE is composed of a cam phasing mechanism connected to the intake camshaft and brushless motor integrated with its intelligent driver. The motor-actuated system is completely free from operating limitation caused from hydraulic conditions. This enjoys an advantage for reducing cold HC. The system also presents further reduction in fuel consumption.

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