ISO 22241-5-2019 PDF

Full title and description

ISO 22241-5:2019 — Diesel engines — NOx reduction agent AUS 32 — Part 5: Refilling interface for passenger cars. This international standard defines the functional and geometric requirements of the on-board refilling interface and its compatibility with off-board refilling systems for passenger cars and light vehicles that use aqueous urea (AUS 32) for SCR NOx reduction.

Abstract

Specifies the refilling interface for the NOx reduction agent AUS 32 in conformance with ISO 22241‑1 to ensure safe, compatible and repeatable refilling of SCR reagent in passenger cars and light commercial vehicles (primarily those with a gross vehicle mass ≤ 3.5 t), while remaining usable for larger vehicles if required. The document sets essential functional and geometric requirements so on‑board and off‑board filling equipment are mutually compatible.

General information

• Status: Published.
• Publication date: July 2019 (2019-07).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 43.060.40 (Fuel systems).
• Edition / version: Edition 2 (2019).
• Number of pages: 16 pages.

Key bibliographic information above is taken from the ISO bibliographic entry for ISO 22241‑5:2019.

Scope

Applies to diesel‑engine road vehicles using selective catalytic reduction (SCR) technology; primarily intended for passenger cars and light commercial vehicles (including buses) with gross vehicle mass not more than 3.5 t, but may also be applied to heavier vehicles. The standard specifies the essential functional and geometric requirements of the refilling system to ensure compatibility between on‑board refilling systems (inlet adapters, filler necks, caps) and off‑board refilling equipment (nozzles, dispensing systems), referring to ISO 22241‑1 for reagent quality requirements.

Key topics and requirements

• Definition of the passenger‑car refilling interface geometry and essential dimensional tolerances to ensure mechanical compatibility between vehicle inlet adapters and off‑board nozzles.
• Functional requirements to minimise spillage, cross‑contamination and mis‑filling (mechanical keying and sealing considerations).
• Requirements intended to ensure safe transfer of AUS 32 (handling, shut‑off behaviour and flow control during dispensing).
• Reference to ISO 22241‑1 for AUS 32 quality characteristics and to related parts of the ISO 22241 series for complementary requirements (materials, testing and alternative refilling interfaces).

Typical use and users

Used by vehicle manufacturers (OEMs), component and filler‑neck/inlet adapter designers, refuelling equipment manufacturers, service and repair workshops, certification bodies and regulators involved in vehicle emissions control and fuel/reagent handling systems. It is applied when designing vehicle refilling hardware and when specifying off‑board dispensing equipment for AUS 32.

Related standards

ISO 22241 is a multipart series; the most relevant companion documents are ISO 22241‑1 (quality requirements for AUS 32), ISO 22241‑2 (test methods), ISO 22241‑3 (test kit and analytical procedures) and ISO 22241‑4 (refilling interface for commercial vehicles / open refilling systems). These parts provide the complementary quality, testing and interface requirements referenced by Part 5.

Keywords

AUS 32, AdBlue, Diesel NOx reduction, SCR, refilling interface, inlet adapter, filler neck, refuelling nozzle, ISO 22241, passenger cars, reagent handling.

FAQ

Q: What is this standard?

A: ISO 22241‑5:2019 is the part of the ISO 22241 series that specifies the refilling interface (functional and geometric requirements) for the NOx reduction agent AUS 32 used in passenger cars and similar light vehicles.

Q: What does it cover?

A: It covers the design and key functional aspects of the on‑board refilling interface and its compatibility with off‑board dispensing systems to ensure safe, repeatable refilling of AUS 32 into vehicle tanks. It does not redefine chemical quality (see ISO 22241‑1) or detailed laboratory test methods (see ISO 22241‑2/‑3).

Q: Who typically uses it?

A: Vehicle OEMs and suppliers designing filler necks and inlet adapters, refuelling equipment manufacturers, service organisations and regulators concerned with SCR reagent handling and vehicle refuelling compatibility.

Q: Is it current or superseded?

A: ISO 22241‑5:2019 is the second edition published in July 2019; it replaced the 2012 edition and is listed as the current published edition (ISO bibliographic record). Users should check national adoption or later amendments, but the ISO bibliographic entry shows the 2019 edition as the active international standard.

Q: Is it part of a series?

A: Yes — ISO 22241 is a multipart standard on AUS 32 (Aqueous Urea Solution) and includes at least Parts 1 through 5 covering quality, test methods and refilling interfaces; Part 5 is the passenger‑car refilling interface.

Q: What are the key keywords?

A: AUS 32, AdBlue, SCR, refilling interface, inlet adapter, filler neck, NOx reduction, ISO 22241.