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http://dx.doi.org/10.7467/KSAE.2013.21.5.169

Comparison Analysis of Dynamic Characteristics of Servo-hydraulic Piezo-driven Injector between 3-way and Bypass-circuit Type  

Jo, Insu (Department of Mechanical Engineering, Graduate School, Soongsil University)
Jeong, Myoungchul (Department of Mechanical Engineering, Graduate School, Soongsil University)
Lee, Jinwook (Department of Mechanical Engineering, Soongsil University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.21, no.5, 2013 , pp. 169-175 More about this Journal
Abstract
CRDi technology of diesel engine was developed from in the early 2000s due to a need to increase fuel efficiency and environment care. Especially, high-pressure fuel injection system in CRDi system which has a fuel injection unit including an injector, a fuel pump and common-rail, etc. becomes possible to make the exhaust gas clean as well as power improvement. In this study, comparison of dynamic characteristics of servo-hydraulic piezo-driven injector with 3-way and bypass-circuit type was analyzed by using the AMESim code. As results of this study, it found the bypass-circuit inside servo-hydraulic piezo injector can cause a faster injection response than that of the 3-way type. Also it was shown that bypass-circuit type had better control capability due to hydraulic bypass system.
Keywords
Bypass-circuit; Piezo-driven injector; CRDi; Piezo indirect acting system; Internal hydraulic modeling; Inverse piezo-electric effect; AMESim simulation code;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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