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: