Browse Publications Technical Papers 2011-36-0073
2011-10-04

System Automated for the Lifting Curves Camshaft 2011-36-0073

In internal combustion engines, gas exchange in the combustion chamber through the intake and exhaust are directly related to engine efficiency. The mechanical element responsible for handling and synchronization of the valves during cycles of intake, compression, combustion and exhaust, in Otto cycle engines and diesel cycle is the camshaft. Soon to know the characteristics of lift, duration, crossing, and the characteristics of velocity and acceleration of the valve assembly is very important to assess the performance of internal combustion engines. However, the engine manufacturers do not provide such features accurately, in order to avoid being easily modified or acquired by other manufacturers. And subtle changes between camshafts fitted the same engine family may promote different torque characteristics and power consumption as well as without, however, characterize a new engine. So that the lifting of curves camshafts is currently done manually, through a process and time-consuming labors, which, besides being inefficient and is prone to failure. The camshaft is positioned to be measured between two points, and this is mounted an encoder scale. A linear sensor is mounted on the lobe of the command to be lifted and the reading is taken linear displacement associated with the reading of the angular spin of the command, in order to get an admission to the curve and a curve for the leakage. Therefore generating an automated madder and fast curves of camshafts in the study, with appropriate precision.

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