EC-490 Diesel Aftertreatment System

SCR

DEF - A little chemistry

DPF

1

Taking the Mystery Out of SCR

2 (NH2)2CO + 4 NO + O2 → 4 N2 + 4 H2O + 2 CO2 and4 (NH2)2CO + 6 NO2 → 7 N2 + 8 H2O + 4 CO2

2

N78.084 %

2

O20.946 %

2

Ar0.9340 %

CO0.0407 %

2

Ne0.001818 %He0.000524 %

CH0.00018 %

4Kr0.000114 %

H0.000055 %

2

0.04338 %

https://commons.wikimedia.org/wiki/File:Atmosphere_gas_proportions.svg I, the copyright holder of this work, release this work into the public domain. This applies worldwide. Accessed 19 May 2020

3

Refer to this link –

2017 MY OBD SYSTEM OPERATION SUMMARY FOR DIESEL ENGINES

Or do a Google search for this file DOBDSM1701.pdf

4

5

Ford Document

System Architecture

2 (NH2)2CO + 4 NO + O2 → 4 N2 + 4 H2O + 2 CO2 and4 (NH2)2CO + 6 NO2 → 7 N2 + 8 H2O + 4 CO2

6

7

8

9

10

11

12

Diesel Exhaust Fluid Chemistry

Sourced here 18 May 2020: https://en.wikipedia.org/wiki/Diesel_exhaust_fluid Text is available under the Creative Commons Attribution-ShareAlike License 13

14

15

16

17

Pause 1

Text is available under the Creative Commons Attribution-ShareAlike License-https://en.wikipedia.org/wiki/Diesel_exhaust_fluid

18

Text is available under the Creative Commons Attribution-ShareAlike License - https://en.wikipedia.org/wiki/Urea

19

From cows?

Text is available under the Creative Commons Attribution-ShareAlike License 20 May 2020 https://en.wikipedia.org/wiki/Urine

20

© Bosch Automotive Service Solutions Inc. 19 May 2020 sourced here: https://www.otctools.com/products/otc-def-refractometer

21

© Bosch Automotive Service Solutions Inc. https://www.otctools.com/sites/default/files/558648_e.pdf 22

© Bosch Automotive Service Solutions Inc. https://www.otctools.com/sites/default/files/558648_e.pdf

23

© Bosch Automotive Service Solutions Inc. 19 May 2020 sourced here: https://www.otctools.com/products/def-urea-tester-%E2%80%93-electronic-refractometer

24

Sourced 18 May 2020 at: https://www.amazon.com/dp/B07DLDZFJX/ref=cm_sw_em_r_mt_dp_U_.FgXEb0E4D8CJ

25

26

27

28

Pause 2

https://youtu.be/RWeDm6QTxZE?t=659

29

30

https://ops.fhwa.dot.gov/publications/fhwahop10024/images/fig3_1.jpg

31

P Pajdowski and B Puchaka 2019 IOP Conf. Ser.: Earth Environ. Sci. 214 012114 2nd International Conference on the Sustainable Energy and Environmental DevelopmentIOP Conf. Series: Earth and Environmental Science 214 (2019) 012114 IOP Publishing doi:10.1088/1755-1315/214/1/012114 32

33

Jeff Curtis

jcurtis@consulab.com

34

35

36