ISO 22241-4:2023 PDF
Diesel engines — NOx reduction agent AUS 32 — Part 4: Refilling interface
Diesel engines — NOx reduction agent AUS 32 — Part 4: Refilling interface
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 18
- Дата публикации:
- 16 октября 2023 г.
- Издание:
- ISO IS 22241 edition 3 version 1
- ICS:
- 43.060.40
This document specifies the refilling interface for the NOx reduction agent AUS 32 in conformance with ISO 22241-1, which is needed to operate converters with a selective catalytic reduction (SCR) exhaust treatment system. This document specifies the minimum functional and geometric requirements of an open refilling system, in order to ensure compatibility between the on-board refilling system and the off-board refilling system. Compatibility conditions for a sealed refilling system are provided in Annex A. This document applies to commercial vehicles and buses as defined in ISO 3833 and having a gross vehicle mass of more than 3,5 t, designed to use stationary off-board refilling systems. This document also applies to the nozzle of stationary off-board refilling systems. NOTE Throughout this document, the term “NOx reduction agent AUS 32” is abbreviated to “AUS 32”.
Abstract
Overview
ISO 22241-4:2023 - "Diesel engines - NOx reduction agent AUS 32 - Part 4: Refilling interface" specifies the refilling interface needed to dispense AUS 32 (aqueous urea solution) into on-board tanks for vehicles equipped with selective catalytic reduction (SCR) systems. The standard sets minimum functional and geometric requirements for open refilling systems (and compatibility conditions for sealed systems in Annex A) to ensure reliable, safe and compatible interaction between on-board and stationary off-board refilling equipment. It applies to commercial vehicles and buses (ISO 3833) with a gross vehicle mass > 3.5 t, and to the nozzles of stationary refilling systems.
Key technical topics and requirements
- Scope & compatibility: Ensures on-board filler necks, inlet adapters and off-board nozzles are compatible for AUS 32 refilling.
- Flow rate: Specified maximum flow range 20–40 L/min for typical refilling (excludes canister and production-line filling).
- Automatic shut-off: Nozzles must include an automatic shut-off to protect against overfill (e.g., compliant with EN 13012).
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Spillage limits: Spillage thresholds depend on filler neck angle:
Технические детали
- Технический комитет
- ISO/TC 22/SC 34 - Propulsion, powertrain and powertrain fluids
- SKU
- ISO 22241-4:2023
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