Adaptive frequency estimation for pulsation removal in airpath pressure signal conditioning

TitleAdaptive frequency estimation for pulsation removal in airpath pressure signal conditioning
Publication TypeConference Paper
Year of Publication2017
AuthorsKoothuparambil, G.R.., and S.. Tripathi
Conference Name2017 IEEE International Conference on Signal Processing, Informatics, Communication and Energy Systems, SPICES 2017
Date Published2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN Number9781538638644 (ISBN)
KeywordsAdaptive frequency estimation, Air intakes, Air paths, airpath pressure, Electronic controls, Engine operations, Engines, Filtering method, Food products, Frequency estimation, Information filtering, Intake and exhaust, Internal combustion engines, Periodic properties, pulsation, Signal processing, Speed

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. The pressure signals sensed by these sensors are found to have pulsations due to construction and operation of the engine induced during 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 on the information of engine speed is the major contribution of this work. © 2017 IEEE.