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Showing 1 to 6 of 6 for “"Valvetrain"”.
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Implementation of a fully variable valve actuation valvetrain
In January 2008 the Sasol (Pty) Ltd Advisory Board identified that the Sasol Advanced Fuels Laboratory's (SAFL) single cylinder research engine was not in line with the current engine technologies, in particular Fully Variable Valve Actuation (FVVA). This project represented the first stage of the …
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New engine concept development process: from green field to friction assessment for cam-roller follower valvetrain system, through an integrate engine designmethodology
… to friction assessment for cam-roller follower valvetrain system, through an integrate engine design methodology
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Enhanced engine efficiency through subsystem lubricant viscosity investigations
… cylinder head enables the characterization of valvetrain lubrication regimes and friction contributions. A Kohler KDW-702 engine was also instrumented with pressure and torque measuring instrumentation, in addition to being modified to have two separate lubrication circuits - one to lubrication …
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Engine modelling for virtual mapping. Development of a physics based cycle-by-cycle virtual engine that can be used for cyclic engine mapping applications, engine flow modelling, ECU calibration, real-time engine control or vehicle simulation studies.
… piston pin offset on the mechanism. The derived Valvetrain model is capable of representing a variable valve lift and phasing Valvetrain which can be used while modelling most modern engines. A butterfly type throttle area model is derived as well as its rate of change which is believed to be a …
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An experimental investigation of camshaft dynamics.
… area can lead to accelerated wear of the valvetrain mechanism, causing the engine to lose power. To try and gain a better understanding of the vibration levels in the camshaft area it was decided to focus this research project on one particular aspect of valvetrain dynamics. It tried to …
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Advanced modeling ,control, and design of an electromechanical engine value drive system with a limited-angle actuator
… actuation (VVA) system ---- an electromechanical valvetrain ---- in order to provide variable valve timing (VVT) in internal combustion (IC) engines. This electromechanical valve drive (EMV) system was proposed by Dr. Woo Sok Chang and his colleagues in the Laboratory for Electromagnetic and …