Optimization of the diesel operating process

Diesel emissionreduction

Student: Group: EContentsTypes of emission;Ecological legislation;Emission reduction;Conclusion.

21. Types of emissionCnHmCONOxParticulatematters32. Ecological legislation

Fig. 1. Nox emission legislation for medium and low speed diesels.4

Fig. 2. Non-road NOx emission legislation.53. Emission reductionExhaust gas aftertreatment:

Selective catalytic reduction (SCR);Particulate matter filtration.

Operating process optimization:

Miller combustion cycle;Multiple injection;Electronic control;Exhaust gas recirculation (EGR).63.1. Operating process optimization

73.1.1. Miller combustion cycle

Fig. 3. Miller combustion cycle.83.1.2. Multiple injection

Fig. 4. Injection characteristic of multiple injection.93.1.2. Multiple injection

Fig. 5. Common rail fuel system.103.1.3. Electronic control

Fig. 6. ECU engine management system.11

3.1.3. Electronic controlFig. 7. MTU engine ECU evolution. (ADEC Advanced Diesel Engine Control)123.1.3. Electronic control

Fig. 8. MTU engine ECU 9.133.1.4. Exhaust gas recirculation (EGR)

Fig. 9. Schematic diagram of exhaust gas recirculation.143.2. Exhaust gas aftertreatment

153.2.1. Selective catalytic reduction (SCR)

Fig. 10. Schematic of the SCR system.

163.2.1. Selective catalytic reduction (SCR)

Fig. 11. Diagram of fuel consumption and nitrogen oxide emissions relationship.17

3.2.1. Selective catalytic reduction (SCR)

Fig. 12. Genset with a 16 cylinder engine equipped with SCR system.18

3.2.2. Particulate matter filtrationFig. 13. Integration of the diesel particulate filter in the engine concept193.2.2. Particulate matter filtration

Fig. 14. Functional diagram of the particle filtration.DOC Diesel oxidation catalyst, DPF Diesel particulate filter.204. ConclusionMain 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;21Thank you for listening22References:23