Engine after treatment cold start validation

18 avril 2023

Engine after treatment cold start validationBy: Nikolaas Van Riet

8 avril 2023 2© sirris | www.sirris.be | info@sirris.be |

Health problem:To much pollutants are released into the environment by diesel engines.

Diesel aftertreatment technologies to reduce particulate matter (PM) and NOx

After treatment devices for offroad engines result of emission regulations (Tier x standards)

8 avril 2023 5picture by http://www.equipmentworld.com/maintenance-24/ © sirris | www.sirris.be | info@sirris.be |

Aftertreatment technologies include selective catalytic reduction (SCR), diesel particulate

filters (DPFs), diesel oxidation catalysts (DOCs), and exhaust gas recirculation (EGR).

8 avril 2023 6Picture by http://www.marantmotortechniek.nl/applications/automotive/Engines/nfeatbeneafter.htm © sirris | www.sirris.be | info@sirris.be |

NH₃/urea SCR is a very effective and widely used technology for the

abatement of NOx from diesel exhaust

Problem:NH₃/urea mixtures typically freeze

around -11°C (12 deg F)

8 avril 2023 8Picture by Gentech © sirris | www.sirris.be | info@sirris.be |

Solution:The urea storage tanks, tubing, pumps,

etc., need to be heated

Solution:The dosing system components must be

protected from damage due to ice expansion, either by purging from urea solution or through freeze proof design.

Verification & ValidationThe validation of the cold start behavior of the whole system must be performed

in a climate chamber

Additional vehicle or system validation tests can be performed while in a

climate chamber

+32498919458

Nikolaas.vanriet (at) owi-lab.be

Nikolaas Van Riet

http://www.sirris.be/climatic_test_chamber.aspx

Engine after treatment cold start validation

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Transcript of Engine after treatment cold start validation

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