ISO TR 13487-1997 PDF

Full title and description

St ISO/TR 13487-1997 — ISO/TR 13487:1997, "Braking of road vehicles — Considerations on the definition of mean fully developed deceleration". This technical report discusses the meaning, measurement and recommended calculation approaches for the mean fully developed deceleration (MFDD) used in vehicle braking performance assessment.

Abstract

This technical report (1997) provides guidance and considerations for defining the mean fully developed deceleration (MFDD) used in braking tests of road vehicles. It explains conceptual and practical aspects of MFDD measurement, describes the speed ranges and distance windows commonly used to calculate MFDD, and offers recommendations intended to improve consistency between test methods and laboratories. The MFDD concept (average deceleration between ~0.8 and ~0.1 of initial test speed) is widely used in vehicle braking performance work.

General information

• Status: Withdrawn (withdrawal processed effective 29 November 2022).
• Publication date: July 1997 (published 09–10 July 1997).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 43.040.40 (Braking systems).
• Edition / version: Edition 1 (1997).
• Number of pages: 22 pages.

Core bibliographic details above are taken from the ISO catalogue entry for ISO/TR 13487:1997; the withdrawal effective date is recorded in ISO lifecycle notices.

Scope

The report addresses conceptual and measurement issues around the definition of mean fully developed deceleration (MFDD) for road-vehicle braking tests. It focuses on clarifying the MFDD speed and distance limits used for calculating average deceleration, discusses practical test conditions and data processing considerations, and aims to promote consistency in how MFDD is reported and interpreted across laboratories and regulations.

Key topics and requirements

• Definition and rationale for mean fully developed deceleration (MFDD) as a metric for braking performance.
• Recommended speed-range and distance-window conventions for MFDD calculation (typically the deceleration averaged between ~0.8 and ~0.1 of initial test speed).
• Guidance on measurement instrumentation, signal filtering and data processing to obtain repeatable MFDD values.
• Discussion of test conditions and vehicle/road factors that influence MFDD and interpretation of results.
• Notes on harmonisation with related braking test methods and regulatory procedures.

Typical use and users

Primary users include vehicle test laboratories, automotive OEM test engineers, regulatory and type‑approval authorities, researchers in vehicle dynamics and road vehicle safety, and organisations developing or harmonising braking test methods. The report is used as background guidance where consistent interpretation of MFDD is required.

Related standards

Relevant and related documents in the braking / vehicle dynamics space include UN/ECE braking regulations (example: UN/ECE R13 definitions used for MFDD calculations), ISO braking test standards and methods such as ISO 611 (braking vocabulary) and later ISO work on stopping-distance and ABS test methods (for example standards from ISO/TC 22/SC 33). ISO/TR 13487 is listed in the braking systems ICS group alongside these related documents.

Keywords

MFDD, mean fully developed deceleration, braking, braking test, vehicle deceleration, ISO/TR 13487, braking measurement, vehicle dynamics, test procedure, braking performance.

FAQ

Q: What is this standard?

A: ISO/TR 13487:1997 is a technical report from ISO titled "Braking of road vehicles — Considerations on the definition of mean fully developed deceleration", providing guidance on the MFDD metric used in braking tests.

Q: What does it cover?

A: It covers conceptual definitions, recommended speed/distance windows for calculation, measurement and data‑processing considerations, and guidance intended to improve consistency of MFDD reporting for vehicle braking performance assessment.

Q: Who typically uses it?

A: Vehicle test labs, OEM test engineers, regulatory authorities, researchers in vehicle dynamics and road safety professionals who need a consistent basis for MFDD calculations and interpretation.

Q: Is it current or superseded?

A: ISO/TR 13487:1997 has been withdrawn (ISO lifecycle stage 95.99); the withdrawal was processed with an effective date recorded as 29 November 2022. National distributors and standards bodies list the item as withdrawn and indicate it was withdrawn without replacement. Users should consult current ISO/TC 22/SC 33 outputs and relevant regulations for the presently applicable test methods.

Q: Is it part of a series?

A: It is a standalone ISO Technical Report within the braking systems subject area (ICS 43.040.40) and was prepared under ISO/TC 22/SC 33 (vehicle dynamics and chassis components); related ISO and regulatory documents address detailed test methods and stopping‑distance/ABS test procedures.

Q: What are the key keywords?

A: MFDD (mean fully developed deceleration), braking, braking tests, vehicle stopping performance, deceleration measurement, ISO/TR 13487.