ToolFusion
πŸ“‹ Case Study

New Holland T9.570 Tractor β€” DPF Overloading Despite Daily Regens

DPF soot loading > 95% within 40 hrs despite active regen every 25 hrs; confirmed via differential pressure and ash accumulation scan

πŸ—οΈ Project Overview

Contract custom farming operation in Victoria, Australia

🎯 Challenge

DPF soot loading > 95% within 40 hrs despite active regen every 25 hrs; confirmed via differential pressure and ash accumulation scan

πŸ”§ Design Approach

Combustion efficiency audit β†’ identified misfiring cylinder β†’ corrected injector timing + optimized EGR valve hysteresis tuning

πŸ“ Design Diagram

New Holland T9.570 β€” DPF Overloading Diagnosis DPF Soot >95% in 40 hrs Regen every 25 hrs β€” insufficient Combustion Efficiency Audit β†’ Misfiring Cylinder Detected Corrected Injector Timing + Optimized EGR Hysteresis Soot Rate: 1.84 g/kWh SR = 0.0012 Γ— BSFC Γ— Fuel_C Γ— Load_F Ash Rate: 0.17 g/hr AR = Oil_Consumption Γ— Ash_Content DPF Recovery Confirmed

AI-generated project design illustration

πŸ“ Key Calculations

Soot Generation Rate

SR = 0.0012 Γ— BSFC Γ— Fuel_Carbon_Content Γ— Load_Factor
Result: 1.84 g/kWh
2.3Γ— higher than spec due to incomplete combustion

Ash Accumulation Rate

AR = Oil_Consumption Γ— Ash_Content
Result: 0.17 g/hr
Confirmed excessive oil burn contributing to non-regenerable ash

πŸ“Š Results

Soot loading stabilized at ≀ 45%; regen interval extended to 72 hrs; oil consumption reduced by 65%

πŸ’‘ Lessons Learned

  • β€’DPF overloading is rarely a DPF issueβ€”it’s usually upstream combustion or lubrication failure
  • β€’Ash accumulation must be tracked separately from soot in long-life DPFs

βœ… Key Takeaways

  • 1DPF overloading is rarely a DPF issueβ€”it’s usually upstream combustion or lubrication failure
  • 2Ash accumulation must be tracked separately from soot in long-life DPFs