Download - Diesel emission reduction
Diesel emissionreduction
Student: Group: E
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Contents
1) Types of emission;2) Ecological legislation;3) Emission reduction;4) Conclusion.
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1. Types of emission
CnHm
CONOx
Particulatematters
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2. Ecological legislation
Fig. 1. Nox emission legislation for medium and low speed diesels.
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Fig. 2. Non-road NOx emission legislation.
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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).
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3.1. Operating process optimization
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3.1.1. Miller combustion cycle
Fig. 3. Miller combustion cycle.
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3.1.2. Multiple injection
Fig. 4. Injection characteristic of multiple injection.
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3.1.2. Multiple injection
Fig. 5. Common rail fuel system.
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3.1.3. Electronic control
Fig. 6. ECU engine management system.
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3.1.3. Electronic control
Fig. 7. MTU engine ECU evolution. (ADEC – Advanced Diesel Engine Control)
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3.1.3. Electronic control
Fig. 8. MTU engine ECU 9.
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3.1.4. Exhaust gas recirculation (EGR)
Fig. 9. Schematic diagram of exhaust gas recirculation.
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3.2. Exhaust gas aftertreatment
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3.2.1. Selective catalytic reduction (SCR)
Fig. 10. Schematic of the SCR system.
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3.2.1. Selective catalytic reduction (SCR)
Fig. 11. Diagram of fuel consumption and nitrogen oxide emissions relationship.
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3.2.1. Selective catalytic reduction (SCR)
Fig. 12. Genset with a 16 cylinder engine equipped with SCR system.
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3.2.2. Particulate matter filtration
Fig. 13. Integration of the diesel particulate filter in the engine concept
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3.2.2. Particulate matter filtration
Fig. 14. Functional diagram of the particle filtration.DOC – Diesel oxidation catalyst, DPF – Diesel particulate filter.
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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;
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Thank you for listening
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References: