Development of an Active Regeneration System Based On Catalytic - - PowerPoint PPT Presentation

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Mar 14, 2023 19 likes •151 views

Development of an Active Regeneration System Based On Catalytic Combustion Active regeneration Based on secondary fuel injection and catalytic combustion Soot oxidation rate 400 60 Soot Oxidation Rate (g/hr) 350 4.8 g/L 50 Soot

SLIDE 1

Development of an Active Regeneration System Based On Catalytic Combustion

SLIDE 2

Active regeneration

Based on secondary fuel injection and catalytic combustion

10 20 30 40 50 60 150 200 250 300 350 400 450 Inlet Temperature (°C) Soot Oxidation Rate (g/hr) 4.8 g/L 2.4 g/L 0.6 g/L

Soot oxidation rate

50 100 150 200 250 300 350 400 600 620 640 660 680 DPF Inlet Temperature (°C) Soot Oxidation Rate (g/hr)

NO2 Regeneration 2NO2+C => 2NO +CO2 O2 Regeneration O2+C => CO2

SLIDE 3

Active regeneration

Based on secondary fuel injection and catalytic combustion Fuel consumption

100 200 300 400 500 25 50 75 100 125

Power output (kW)

Expected Temp Increase (°C)

150 kg/hr 700 kg/hr 1200 kg/hr

30 60 90 120 150 50 100 150 200 250

Fuel Injection Rate (cm3/min)

Power output (kW)

SLIDE 4

Active regeneration system

System description

Based on secondary fuel injection
Catalytic combustion
Controlled Regeneration
Ensures required Soot
xidation Rates.

SLIDE 5

Active regeneration system

Main components

Fuel supply
Injection manifold
Electronic control unit

SLIDE 6

Control Algorithm

Regeneration start parameters

Max soot loading is reached.
And/or min. regeneration time interval reached.
Acceptable exhaust temperature

SLIDE 7

Control Algorithm

Regeneration stop parameters

Injection time has elapsed.
Engine switched off.
Temperature after catalyst under low limit over time.
Temperature after catalyst over high limit.
System error.

SLIDE 8

Active regeneration system

Field trial

SLIDE 9

System description

Injection manifold / Dosing unit Combustion catalyst Fuel delivery system DPF

SLIDE 10

Field trial results

Example of regeneration event

Engine speed Engine load Fuel pressure Air pressure After catalyst Before DPF Exhaust pipe Before catalyst After DPF

SLIDE 11

Field trial results

Example with regeneration triggered by exhaust back pressure

Exhaust back pressure Temperatures After catalyst Before catalyst 140 mbar

SLIDE 12

Field trial results

DPF performance

Low temperature application
High PM application
Controlled regeneration
Succesful regeneration
Clean tailpipe

SLIDE 13

Safety features

Control system safety functions

Injection, air pressure and fuel pressure stop at system error.
System error at high catalyst outlet temp
System error at hi/lo Fuel and air pressure.
System error at Injection (PWM) feed back error.
System error at EGR error (if used)
Fuel pressure only in injection mode