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DPF 的控制及耐久性DPF Control and Durability
湛日景
Reggie Zhan, Ph.D., Principal Engineer
Engine and Vehicle Technology
Southwest Rearch Institute
欧美一对一外教
Performance
Filtration Efficiency
Pressure drop performance
Thermal survivability –Normal thermal cycle –Thermal shock
Loading and regeneration
Catalyst efficiencyg开头的英文名
Durability
Thermal aging Ash accumulation
On -vehicle durability
Validation
Thermal & mechanical
–“hot vibration ”–“Liquid spray ”
Application
Control strategy Calibration
OBD
Component
magnetic
worth it
Asmbly
世界大学最新排名
System
How to predict DPF soot loading level (g/L) to direct active DPF regeneration?
–Integrate major elements –ideal robust soot model:
Steady-state 3-D (RPM, Torque, EGR) maps
–PM and SOFpc什么意思
–NO
x
–Temperatures (DOC-in and DPF-in)
–Exhaust Flowrate
Estimate “transient PM rate”(“Driver variability”) –
Most dominating factor!
Establish DOC efficiencies (SOF, NO-to-NO2)
Establish DPF soot rate
–(DOC-out minus passive regeneration)
compliance
–Re-calibrate system for NO
2
–Add safety factors, build control models to initiate DPF active regeneration
–Controls to avoid runaway regenerations, handles incomplete regenerations
Challenges
How to incorporate DPF aging into model?
化妆培训中心–cDPF Thermal Aging–uncontrolled regeneration
may not follow typical TWC/DOC thermal aging
threshold (Arrhenius Rate Law)
–cDPF Poisoning–lubricant poisoning and ash
accumulated may affect DOC light-off and efficiency
(e.g., passive regeneration), as well as cDPF
成长的烦恼第二季efficiency (e.g., BPT)
–Need a realistic DF estimate at different vehicle
mileage, with realistic estimate of uncontrolled
regenerations and oil consumption.
考研政治预测
Rpersonalcomputer
Develop methodologies to achieve safe DPF regeneration
