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As the quantification of fluid inertance, the suction flow characteristic is the crucial performance indicator for efficiency improvement. To explore the discrepancy between the passive inertance hydraulic converter featured by the check valve and the active inertance hydraulic converter driven by an equivalent 2\/3 way fast switching valve in regard to suction flow characteristics, analytical models of the inertance hydraulic converters were established in MATLAB\/Simulink. The validated models of the respective suction components were incorporated in the overall analytical models and their suction flow characteristics were theoretically and experimentally discussed. The analytical predictions and experimental measurements for the current configurations indicated that the active inertance hydraulic converter yields a larger transient suction flow rate than that of the passive inertance hydraulic converter due to the difference of the respective suction components. The suction flow characteristic can be modulated using the supply pressure and duty cycle, which was confirmed by experimental measurements. In addition, the suction flow characteristics are heavily affected by the resistance of the suction flow passage and switching frequency. There is a compromise between the resistance and switching frequency for inertance hydraulic converters to achieve large suction flow rate.<\/jats:p>","DOI":"10.1177\/09596518211024878","type":"journal-article","created":{"date-parts":[[2021,6,28]],"date-time":"2021-06-28T07:01:23Z","timestamp":1624863683000},"page":"3-25","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":2,"title":["Investigation of suction flow characteristic in the inertance hydraulic converters for efficiency improvement"],"prefix":"10.1177","volume":"236","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3759-1441","authenticated-orcid":false,"given":"Xiaoming","family":"Chen","sequence":"first","affiliation":[{"name":"National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics and Astronautics, Nanjing, China"},{"name":"College of Engineering, University of Saskatchewan, Saskatoon, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7399-1656","authenticated-orcid":false,"given":"Yuchuan","family":"Zhu","sequence":"additional","affiliation":[{"name":"National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics and Astronautics, Nanjing, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4624-9285","authenticated-orcid":false,"given":"Travis","family":"Wiens","sequence":"additional","affiliation":[{"name":"College of Engineering, University of Saskatchewan, Saskatoon, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Doug","family":"Bitner","sequence":"additional","affiliation":[{"name":"College of Engineering, University of Saskatchewan, Saskatoon, 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