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Brake Rating Power Requirements—Truck and Bus
- Ground Vehicle Standard
- J257_201108
- Revised
Sector:
Issuing Committee:
Language:
English
Scope
The minimum performance values in this SAE Recommended Practice are applicable to vehicles with brake systems having typical service pressure ranges 0 to 16.6 MPa (0 to 2400 psi) hydraulic or 0 to 945 kPa (0 to 135 psi) air only. SAE J880 not only provides for determining maximum brake rating power capability, but also permits verification of any desired or arbitrary level such as the requirement established herein. The determining criteria for deciding brake rating power capability are:
-
a
Cold brake stopping ability.
-
b
Fade as a result of brake power absorption.
-
c
Hot brake stopping ability following brake power absorption.
-
d
Brake system stability following brake power absorption.
-
e
Functional and structural integrity of brake system following test.
Rationale
Deletion of obsolete terminology (i.e. horsepower). Revision to the brake system service pressure ranges, both hydraulic and air, to more accurately reflect typical system service pressure ranges and governor cut-in pressure settings in accordance with current industry practices.
Recommended Content
| Technical Paper | Emergency Braking Systems for School Buses |
| Technical Paper | Evolution of the Trailer Air Brake System Under the Effect of FMVSS 121 |
Data Sets - Support Documents
No Datasets Available
Issuing Committee
Truck and Bus Brake Systems Committee
The Truck and Bus Brake Systems Committee of the Truck and Bus Brake and Stability Control Steering Committee is responsible for developing, reviewing, and approving recommended practices, standards, and information reports related to brake systems of trucks, tractor-trailer combinations and buses over 10,000 lbs (4500 Kg) GVWR designed primarily for highway use.
Reference
| Number | Title |
|---|---|
| J880_201110 | Brake System Rating Test Code - Commercial Vehicles |
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