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Hydropneumatic suspension testing of a wheeled armoured personnel carrier
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Instytut Pojazdów i Transportu, Wojskowa Akademia Techniczna, Poland
Laboratorium Badań Pojazdów Gąsienicowych, Military Instytute of Armoured and Automotive Technology, Poland
Ministry of National Defence, Poland
Zdzisław Hryciów   

Instytut Pojazdów i Transportu, Wojskowa Akademia Techniczna, Kaliskiego 2, 00-908, Warszawa, Poland
Submission date: 2023-01-19
Final revision date: 2023-02-17
Acceptance date: 2023-03-21
Online publication date: 2023-04-04
Publication date: 2023-04-04
Eksploatacja i Niezawodność – Maintenance and Reliability 2023;25(2):162497
  • Hydropneumatic (HP) suspension allows easy design of spring characteristic.
  • Simulation studies of HP suspension usually assume a polytropic gas process.
  • Static deflection decreases with increasing temperature and initial gas pressure.
  • Friction in the seals is an important source of resisting force.
  • The HP struts heat up considerably during operation of the carriers.
The purpose of this study was to determine the effect of gas pressure and temperature on the spring characteristic of a HP strut used in a wheeled armoured personnel carrier. The research was performed based on a simulation model. Data to validate the model were obtained during experimental tests. The results indicate, among other things, that the friction generated in the seals is an important source of resistance force. Comparison of the simulation results with the measured characteristics indicates a proper modelling of the strut operation. Simulation studies have indicated that it is easy to modify the required suspension parameters by adjusting the initial gas pressure. A linear effect of pressure on static deflection can be assumed. Temperature has a strong influence on the spring characteristic. When it changes, significant changes in vehicle height are observed due to the lack of a compensation system. The temperature changes are not only due to changes in ambient temperature, but also by intense heating of the HP struts caused by the vehicle moving over rough terrain.
This work was financed/co-financed by Military University of Technology under research project UGB 762/2022.
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The Archives of Automotive Engineering – Archiwum Motoryzacji