Browsing by Author "MAHESH, K R"

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    Increasing The Performance of Existing Ic Engines By Free Valve Actuation Technology
    (2020-09-16T07:04:56Z) AJAY KUMAR, K V; HARI PRASAD, J; LIKITH, R S; MAHESH, K R
    The engines powering today’s vehicles whether they burn gasoline or diesel fuel rely on a system of valves to admit fuel and air into the cylinder and the exhaust gases to escape after combustion. Cam has been an integral part of internal combustion engine from its invention. Cam controls the breathing channels of the IC engines and hence maintains constant valve timing. The problem in using cam shafts is being major power wastage in accelerating and decelerating the components of the valve train. Friction of camshafts, springs, cam belts etc., also robs us of precious power and worsens fuel economy not to mention contributing to wear and tear. In response to the needs of improved engines some mechanical or hydraulic devices have been designed to achieve some variable valve timing and to reduce the disadvantages accompanied with the usage of cams. Most four-stroke piston engines today employ one or more camshafts operated poppet valves. The lobes on the camshafts operate cam followers which in turn open the poppet valves. A cam less (or, free valve engine) uses electromagnetic, hydraulic, or pneumatic actuators to open the poppet valves instead. Actuators can be used to both open and close the valves, or an actuator opens the valve while a spring closes it. In order to control the actuators, Arduino is used by programming the valve timing with respect to the specification of the engine used.