alexa Development of Variable Valve Timing System Controlled by Electric Motor
Engineering

Engineering

Advances in Automobile Engineering

Author(s): Masayoshi Hattori

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o 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.

This article was published in SAE international and referenced in Advances in Automobile Engineering

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