1. Diesel emission reduction Student: Group: E Scientific adviser: Language adviser:

2. Contents 1)Types of emission; 2)Ecological legislation; 3)Emission reduction; 4)Conclusion. 2

3. 1. Types of emission CnHmCnHm CONO x Particulate matters 3

4. 2. Ecological legislation Fig. 1. No x emission legislation for medium and low speed diesels. 4

5. Fig. 2. Non-road NO x emission legislation. 5

6. 3. Emission reduction Exhaust gas aftertreatment: -Selective catalytic reduction (SCR); -Particulate matter filtration. Operating process optimization: -Miller combustion cycle; -Multiple injection; -Electronic control; -Exhaust gas recirculation (EGR). 6

7. 3.1. Operating process optimization 7

8. 3.1.1. Miller combustion cycle Fig. 3. Miller combustion cycle. 8

9. 3.1.2. Multiple injection Fig. 4. Injection characteristic of multiple injection. 9

10. 3.1.2. Multiple injection Fig. 5. Common rail fuel system. 10

11. 3.1.3. Electronic control Fig. 6. ECU engine management system. 11

12. 3.1.3. Electronic control Fig. 7. MTU engine ECU evolution. (ADEC – Advanced Diesel Engine Control) 12

13. 3.1.3. Electronic control Fig. 8. MTU engine ECU 9. 13

14. 3.1.4. Exhaust gas recirculation (EGR) Fig. 9. Schematic diagram of exhaust gas recirculation. 14

15. 3.2. Exhaust gas aftertreatment 15

16. 3.2.1. Selective catalytic reduction (SCR) Fig. 10. Schematic of the SCR system. 16

17. 3.2.1. Selective catalytic reduction (SCR) Fig. 11. Diagram of fuel consumption and nitrogen oxide emissions relationship. 17

18. 3.2.1. Selective catalytic reduction (SCR) Fig. 12. Genset with a 16 cylinder engine equipped with SCR system. 18

19. 3.2.2. Particulate matter filtration Fig. 13. Integration of the diesel particulate filter in the engine concept 19

20. 3.2.2. Particulate matter filtration Fig. 14. Functional diagram of the particle filtration. DOC – Diesel oxidation catalyst, DPF – Diesel particulate filter. 20

21. 4. Conclusion Main concepts of the modern diesel engine: -Low fuel consumption; -Low emission. It is possible due to: -Electronic control; -Interaction between all engine systems; -Exhaust gas aftertreatment; 21

22. 4. Conclusion Fig. 15. Schematic of John Deere diesel engine system. 22