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Inertia Calculation for Single-Ended Inertia-Dynamometer Testing
- Ground Vehicle Standard
- J2789_201008
- Issued
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
This procedure provides methods to determine the appropriate inertia values for all passenger cars and light trucks up to 4540 kg of GVWR. For the same vehicle application and axle (front or rear), different tests sections or brake applications may use different inertia values to reflect the duty-cycle and loading conditions indicated on the specific test.
Rationale
The validity of the results of a single-ended inertia-dynamometer test depends heavily on the inertia values. The objective of this Recommended Practice is to provide a common methodology for determining the inertia values for single-ended brake dynamometer testing.
The test loads, energy levels, and rotational speeds during single-ended inertia-dynamometer testing are a function of the vehicle under evaluation. Since the majority of dynamometer tests use a single-ended configuration, a standardized methodology to determine the test inertia is necessary to ensure the consistency and usefulness of the test results. When using this Recommended Practice the value for the test inertia can be determined as a function of vehicle type, braking system configuration, vehicle parameters available, chassis dimensions, vehicle weights, center of gravity location, and deceleration level.
Recommended Content
| Book | Brake Design and Safety, Second Edition |
| Technical Paper | Antilock Brake System Application to a Motorcycle Front Wheel |
| Technical Paper | Correlation of Lining Properties with Brake Pedal Feel |
Topic
Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| TABLE 1 | INERTIA SPLIT FOR FULLY-OPERATIONAL SYSTEMS WITH FIXED BRAKE PROPORTIONING | |
| TABLE 2 | INERTIA SPLIT FOR FULLY-OPERATIONAL SYSTEMS WITH ELECTRONIC BRAKE DISTRIBUTION |
Issuing Committee
Brake Dynamometer Standards Committee
The Brake Dynamometer Standards Committee is part of the Foundation Brake Steering Committee that reports to the Motor Vehicle Council. The committee is responsible for developing standards, recommended practices, and information reports for brake dynamometer testing, for on-road vehicles below 4540 kg of Gross Vehicle Weight Rating. The committee also maintains liaison activities with other Standard Development Organizations or industry consortia.
Reference
| Number | Title |
|---|---|
| ISO611 | This document is not part of the subscrption. |
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