Abstract
Emission legislation limits have tightened in recent years. With regards to the
European Union, the new Euro 7 legislation is expected to come into force within
2025. Furthermore, discussions on zero-impact emission levels are ongoing,
which in addition are relevant for the assessment of future propulsion systems.
In this study, the exhaust aftertreatment system (EAS) of an SI DI 2 l hydrogen
engine with dedicated emission control is experimentally evaluated in stationary
operation. After that, transient experiments with both low- and high-load RDE
driving cycles are conducted. A special focus is put on the heat-up phase of the
EAS. Various heat-up measures, including retarded ignition timing, load point
shifting and an electrically heated catalyst (EHC) are considered. The 3 kW EHC
showed good performance and was further used for the EAS heat-up. The driving
cycles are then experimentally conducted with an EAS consisting of an EHC, an
SCR catalyst, an ammonia slip catalyst (ASC) and a particulate filter (PF). In the
WLTC, NOx tailpipe emissions as low as 1.7 mg/km are achieved, which means
a reduction rate of 98 %. In the low- and high-load RDE cycle NOx reduction
rates amount to 90 %. Measurement results are assessed towards upcoming Euro
7 emission limits and – in a first approach – towards recently published zeroimpact
emission levels. The obtained results underline the potential of a hydrogen
engine towards zero-impact emission propulsion technology.
European Union, the new Euro 7 legislation is expected to come into force within
2025. Furthermore, discussions on zero-impact emission levels are ongoing,
which in addition are relevant for the assessment of future propulsion systems.
In this study, the exhaust aftertreatment system (EAS) of an SI DI 2 l hydrogen
engine with dedicated emission control is experimentally evaluated in stationary
operation. After that, transient experiments with both low- and high-load RDE
driving cycles are conducted. A special focus is put on the heat-up phase of the
EAS. Various heat-up measures, including retarded ignition timing, load point
shifting and an electrically heated catalyst (EHC) are considered. The 3 kW EHC
showed good performance and was further used for the EAS heat-up. The driving
cycles are then experimentally conducted with an EAS consisting of an EHC, an
SCR catalyst, an ammonia slip catalyst (ASC) and a particulate filter (PF). In the
WLTC, NOx tailpipe emissions as low as 1.7 mg/km are achieved, which means
a reduction rate of 98 %. In the low- and high-load RDE cycle NOx reduction
rates amount to 90 %. Measurement results are assessed towards upcoming Euro
7 emission limits and – in a first approach – towards recently published zeroimpact
emission levels. The obtained results underline the potential of a hydrogen
engine towards zero-impact emission propulsion technology.
| Originalsprache | englisch |
|---|---|
| Publikationsstatus | Veröffentlicht - 28 Feb. 2023 |
| Veranstaltung | 10. Internationaler Motorenkongress 2023: Treffpunkt der Community für Antriebe und nachhaltige Kraftstoffe - Kongresshaus Baden-Baden, Baden Baden, Deutschland Dauer: 28 Feb. 2023 → 1 März 2023 https://www.atzlive.de/veranstaltungen/internationaler-motorenkongress/ |
Konferenz
| Konferenz | 10. Internationaler Motorenkongress 2023 |
|---|---|
| Land/Gebiet | Deutschland |
| Ort | Baden Baden |
| Zeitraum | 28/02/23 → 1/03/23 |
| Internetadresse |
Fields of Expertise
- Mobility & Production
- Sustainable Systems