ISO 10521-2-2006 PDF

Full title and description

ISO 10521-2:2006 — Road vehicles — Road load — Part 2: Reproduction on chassis dynamometer. Specifies methods for setting the target road load on chassis dynamometers for subsequent tests (for example fuel consumption or exhaust-emission measurements), including procedures that depend on road-load determination methods such as coastdown, torquemeter or wind-tunnel/chassis-dynamometer methods.

Abstract

ISO 10521-2:2006 gives detailed instructions for reproducing the road load on chassis dynamometers from values obtained by the measurement methods defined in ISO 10521-1:2006. It is applicable to chassis dynamometers able to set road load at a minimum of three speed points and to motor vehicles (as defined in ISO 3833) with a gross vehicle mass up to 3 500 kg.

General information

• Status: Published (International Standard; under systematic review as listed by ISO).
• Publication date: 2006 (ISO lists October 2006).
• Publisher: International Organization for Standardization (ISO). National/adopted editions (for example BSI) are also available.
• ICS / categories: 43.020 — Road vehicles in general.
• Edition / version: Edition 1 (2006).
• Number of pages: ISO metadata lists 12 pages; some national/adoption PDFs (e.g., BSI) include additional front/back matter and show 22 pages. Users should check the specific publisher PDF for exact page count.

Scope

This part of ISO 10521 specifies methods of setting the target road load on chassis dynamometers for the purpose of subsequent tests (for example fuel consumption or exhaust-emission measurements). The procedures depend on the road-load measurement method used (coastdown, torquemeter or wind-tunnel/chassis-dynamometer) and provide the detailed setting methods required to reproduce road-load values on dynamometers. It is intended for chassis dynamometers that can set road load at a minimum of three speed points and applies to motor vehicles (ISO 3833) up to 3 500 kg gross vehicle mass.

Key topics and requirements

• Procedures for transferring road-load values (from coastdown, torquemeter or wind-tunnel/chassis-dynamometer methods) to chassis dynamometer settings.
• Minimum dynamometer capability: ability to set road load at a minimum of three speed points.
• Required overall measurement accuracy and preparation steps for chassis-dynamometer tests (roller and room conditions, inertia/mass setting, preconditioning).
• Vehicle preparation requirements (tyre pressure, vehicle settings, preconditioning) and adjustment methods for dynamometer settings.
• Normative calculation and adjustment annexes giving formulas and procedures for calculating and adjusting road load on the dynamometer.

Typical use and users

Used by vehicle test laboratories, OEM test engineers, emissions and fuel-consumption test facilities, homologation bodies and testing-equipment manufacturers to reproduce on a chassis dynamometer the road-load conditions required for standardized tests. Also used by research organizations and consultants involved in vehicle performance, emissions and fuel-economy testing.

Related standards

ISO 10521-1:2006 — Road vehicles — Road load — Part 1: Determination under reference atmospheric conditions (defines the measurement methods whose results Part 2 uses for dynamometer reproduction). ISO 3833:1977 (vehicle definitions/terms referenced). ISO 10521:1992 is the withdrawn predecessor replaced by the 2006 two-part revision.

Keywords

road load, chassis dynamometer, coastdown method, torquemeter method, wind-tunnel, vehicle road-load reproduction, fuel consumption test, exhaust-emission measurement, ISO 10521, road vehicles.

FAQ

Q: What is this standard?

A: ISO 10521-2:2006 is Part 2 of the ISO 10521 series and specifies how to reproduce measured road-load values on a chassis dynamometer for vehicle testing purposes.

Q: What does it cover?

A: It covers procedures for setting dynamometer load from road-load measurement methods (coastdown, torquemeter, wind-tunnel/chassis-dynamometer), required dynamometer capabilities (minimum speed points), preparation of equipment and vehicle, accuracy requirements and calculation/adjustment methods (normative annexes).

Q: Who typically uses it?

A: Vehicle test laboratories, OEM and supplier test engineers, emissions and fuel-economy testing facilities, homologation bodies and dynamometer/equipment manufacturers.

Q: Is it current or superseded?

A: ISO 10521-2:2006 is the published edition from 2006 and replaced the earlier ISO 10521:1992 as part of a two-part 2006 revision. ISO’s record shows the 2006 parts as published and under periodic systematic review. Users should check ISO or their national standards body for any later amendments or withdrawals.

Q: Is it part of a series?

A: Yes — it is Part 2 of ISO 10521. Part 1 (ISO 10521-1:2006) defines road-load determination under reference atmospheric conditions; Part 2 defines reproduction on chassis dynamometers.

Q: What are the key keywords?

A: Road load, chassis dynamometer, coastdown, torquemeter, wind-tunnel, fuel consumption testing, exhaust-emission testing, ISO 10521.