The paper presents the results of the bench tests to measure mechanical vibrations of a new aircraft opposed piston engine with reciprocating pistons. The PLZ-100 engine is a three-cylinder, six-piston, two-shaft drive unit with a two-stroke diesel cycle. This type of engine is dedicated for powering light aircraft, e.g. autogyros. The tests were carried out on a test bench at the Lublin University of Technology. The engine was loaded with constant torque, for several fixed values of rotational speed of a crankshaft. The angle of the start of diesel injection was changed for each of the rotational speeds. The mechanical vibrations that accompanied the operation of this drive unit were recorded with three measurement transducers and a National Instruments conditioning system. Each of the transducers was mounted on a different axis of the engine. The signals were analyzed from their courses with the DIAdem software. The results were the courses of effective speed and vibration acceleration to conduct a vibration-acoustic evaluation of the PLZ-100, detect and prevent various types of defects or failures.
This work has been realized in cooperation with The Construction Office of WSK "PZL-KALISZ" S.A." and is part of Grant Agreement No. POIR.01.02.00-00-0002/15 financed by the Polish National Centre for Research and Development
BROOKE, L. Advancing the OP engine on three fronts. SAE International. 2021,
CHANGMING, H., SICHUAN, X. The investigation of self-balanced property and vibration on the particular crankshaft system for an opposed piston engine. SAE Technical Paper 2016-01-1768. 2016.
CZARNIGOWSKI, J., WENDEKER, M., JAKLIŃSKI, P. et al. Model of injection system for SI radial aircraft engine. SAE Technical Paper 2007-01-1903. 2007.
CZYŻ, Z., KARPIŃSKI, P., SKIBA, K. CFD investigation of the aerodynamic characteristics of the autogyro with a double tail stabilizer. Journal of Physics: Conference Series. 2021, 1736, 1-8.
CZYŻ, Z., WENDEKER, M., RACZYŃSKI, R. Koncepcja hybrydowego statku powietrznego z napędem wielowirnikowym. Logistyka. 2014, 6, 2936-2945.
GĘCA, M., WENDEKER, M., LITAK G. Combustion variability and uniqueness in cylinders of a large power radial engine. Journal of Vibroengineering. 2012, 14(2), 582-590.
GRABOWSKI, Ł., PIETRYKOWSKI, K., KARPIŃSKI P. Energetic analysis of the aircraft diesel engine. MATEC Web of Conferences. 2019, 252, 1-6.
GRABOWSKI, Ł., SOCHACZEWSKI, R., BARAŃSKI, G. et al. Research into a fuel supply system in the aircraft diesel opposed engine. 2020 IEEE 7th International Workshop on Metrology for AeroSpace (MetroAeroSpace). 2020, 620-624.
HOFBAUER, P. Opposed piston opposed cylinder (OPOC) engine for military ground vehicles. SAE Technical Paper 2005-01-1548. 2005.
HUO, P.W., QIU, J.S. Analysis of self-balance characteristics of OPOC engine. Advanced Materials Research. 2011, 211-212, 93-96.
MAGRYTA, P., GĘCA, M. FEM analysis of piston for aircraft two stroke diesel engine. MATEC Web of Conferences. 2019, 252, 1-6.
Mechanical vibration ISO 10816. Online Browsing Platform 2021.
MIKALSEN, R., ROSKILLY, A.P. A computational study of free-piston diesel engine combustion. Applied Energy. 2009, 86(7-8), 1136-1143.
PCB, PiezoElectronics. Model 352C03 2021. 2021.
PIRAULT, J.P., FLINT, M. Opposed piston engines evolution, use and future applications. Publisher SAE International. 2010.