Electric Camshaft Phasing System to Meet Euro 6/BS-VI Emission Norms for Gasoline Engine 2019-26-0055
In today’s ever-changing scenario, gasoline engine is going to be more acceptable passenger vehicle prime mover, as it meets Bharat Stage-VI (BS-VI) emission standard and need less cost of up-gradation. Variable cam phasing (VCP) system is well known & proven advanced technology in automotive world, which already used by many OEMs globally to improve fuel consumption and reduce engine emissions. Electric Cam Phasing (ECP) is an integration of electro-mechanical system. In ECP, angle shifting is independent of engine oil pressure, which allows a more aggressive engine calibration of valve timing to minimize active intervention in the ignition and fuel injection sequences. Early advance timing makes it possible for the combustion engine to build up torque more quickly during acceleration, which means that ECP not only helps to achieve high operating efficiency, but also good driving performance. This paper will describe use of advanced features of ECP over Hydraulic Cam Phaser (HCP) in achieving improved fuel consumption & reduction in HC & CO emissions to meet BS-VI standard by precise controlling of valve timing at engine start condition and to enhance driving comfort, low engine vibrations during engine stop condition.