• Technical Consulting
• Strategic Consulting
• Software
  • Ricardo Software News
  • Products
    • All Product Flyer
    • WAVE
    • WAVE-RT
    • VECTIS
    • ENGDYN
    • VALDYN
    • FEARCE
    • PISDYN
      • Piston Dynamics
      • Finite Element Modelling
      • Case study 1
      • Case study 2
      • Available Papers
      • PISDYN Flyer
    • RINGPAK
    • SABR
    • IGNITE
    • Export Restrictions
    • Third Party Licenses
  • Events
  • Training
  • Software Careers
  • Support - Ricardo Software Log In
  • Contacts
  • Partners
  • Ricardo Software and CAE Newsletter
• Ricardo Knowledge
• Information Services
• Seminars & Training
• Environmental Consulting

Friction

Objective

• Validate the friction prediction capability of PISDYN and RINGPAK by comparing predictions with measured piston assembly friction force

 Process

• Measurements were made on a single cylinder Ricardo Hydra gasoline engine using IMEP method
• PISDYN was used to predict friction force and power loss at the interface between the piston skirt and cylinder liner
• RINGPAK was used to predict the friction force and power loss at each ring
• Total friction force and power loss due to skirt and rings was compared with the measured data

 Parametric Studies

• Engine load
• Engine speed
• Skirt surface roughness
• Oil temperature
• Liner surface texture
• Boundary friction coefficient
• Oil grade

 Result

• Graphs show good correlation between measured piston assembly friction power loss and sum of predicted values for rings and skirt
• Presented at SAE (SAE 2006-01-0426)