Adaptive Frequency Estimation for Pulsation Removal in Airpath Pressure Signal Conditioning

Publication Type:

Conference Proceedings


International Conference on Signal Processing, Informatics, Communication and Energy Systems (SPICES 2017), IEEE (2017)


Dept. of Electronics and communication Engineering.


In electronic control of internal combustion engine several sensors are used in the intake and exhaust path to acquire information about pressure, temperature, air mass flow, actuator position etc., for executing optimum control of the desired engine operation. Thepressure signals sensed by these sensors are found to have pulsations due to construction and operation of the engine inducedduring intake and exhaust stroke. Thus, the frequencies of these pulsations have been correlated to vary with engine speed. As a result, filtering methods using engine speed information directly or indirectly have been currently used in the industry. The study presented in this paper aims at predicting the frequency of the pulsations in the sensed signals by using the periodic property of the pulsations and not from engine speed. Using the estimated frequency, possibility of pulsation filtering without depending onthe information of engine speed is the major contribution of this work.