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Standard

Inertia Dynamometer Disc and Drum Brake Effectiveness Test Procedure

2023-12-13
CURRENT
J2522_202312
This SAE Recommended Practice establishes a standard method to perform screening test sequences that identify a brake friction material’s effectiveness under various test conditions. The result is an evaluation of brake friction material effectiveness under a set of defined braking conditions considered most relevant to automobile braking system development.
Standard

Inertia Calculation for Single-Ended Inertia-Dynamometer Testing

2010-08-05
HISTORICAL
J2789_201008
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.
Standard

Inertia Calculation for Single-Ended Inertia-Dynamometer Testing

2018-09-26
HISTORICAL
J2789_201809
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.
Standard

Inertia Calculation for Single-Ended Inertia-Dynamometer Testing

2023-04-12
CURRENT
J2789_202304
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.
Standard

FMVSS Inertia Dynamometer Test Procedure for Vehicles Below 4540 kg GVWR

2021-01-27
CURRENT
J2784_202101
This document derives from the Federal Motor Vehicle Safety Standards 105 and 135 vehicle test protocols as single-ended inertia-dynamometer test procedures. The test sequences enable brake output measurement, friction material effectiveness, and corner performance in a controlled and repeatable environment. This SAE Recommended Practice (RP) also includes optional sections for parking brake output performance for rear brakes. It applies to brake corners from vehicles covered by the FMVSS 105 and 135 when using the appropriate brake hardware and test parameters. The FMVSS 135 applies to all passenger cars and light trucks up to 3500 kg of GVWR. The FMVSS 105 applies to all passenger cars, multi-purpose vehicles, buses, and trucks above 3500 kg of GVWR. This document does not include testing for school bus applications or vehicles equipped with hydraulic brakes with a GVWR above 4540 kg.
Standard

FMVSS Inertia Dynamometer Test Procedure for Vehicles Below 4540 kg GVWR

2009-09-04
HISTORICAL
J2784_200909
This document is derived from the Federal Motor Vehicle Safety Standards 105 and 135 vehicle test protocols as single-ended inertia-dynamometer test procedures. It measures brake output, friction material effectiveness, and corner performance in a controlled and repeatable environment. The test procedures also include optional sections for parking brake output performance for rear brakes. It is applicable to brake corners from vehicles covered by the FMVSS 105 and 135 when using the appropriate brake hardware and test parameters. The FMVSS 135 is applicable to all passenger cars and light trucks up to 3500 kg of GVWR. The FMVSS 105 is applicable to all passenger cars, multi-purpose vehicles, buses, and trucks above 3500 kg of GVWR. This document does not include testing for school bus applications or vehicles equipped with hydraulic brakes with a GVWR above 4540 kg.
Standard

FMVSS Inertia Dynamometer Test Procedure for Vehicles Below 4540 kg GVWR

2023-02-14
WIP
J2784
This Recommended Practice is derived from the Federal Motor Vehicle Safety Standard 135 vehicle test protocol as a single-ended inertia-dynamometer test procedure. It measures brake output, friction material effectiveness, and corner performance in a controlled and repeatable environment. The test procedure also includes optional sections for parking brake output performance for rear brakes. It applies to brake corners from vehicles covered by the FMVSS 135 when using the appropriate brake hardware and test parameters. This procedure applies to all passenger cars and light trucks up to 3500 kg of Gross Vehicle Weight Rating. This recommended practice is not applicable to evaluate the braking system performance of two-axle multipurpose passenger vehicles, trucks, and buses towing a trailer in combination. Reference SAE J2807 Recommended Practice for Performance Requirements for Determining Tow-Vehicle Gross Combination Weight Rating and Trailer Weight Rating.
Standard

FMVSS 135 Inertia Dynamometer Test Procedure

2007-12-13
HISTORICAL
J2784_200712
This Recommended Practice is derived from the Federal Motor Vehicle Safety Standard 135 vehicle test protocol as a single-ended inertia-dynamometer test procedure. It measures brake output, friction material effectiveness, and corner performance in a controlled and repeatable environment. The test procedure also includes optional sections for parking brake output performance for rear brakes. It is applicable to brake corners from vehicles covered by the FMVSS 135 when using the appropriate brake hardware and test parameters. This procedure is applicable to all passenger cars and light trucks up to 3500 kg of GVWR.
Standard

Dynamometer Global Brake Effectiveness

2003-06-11
HISTORICAL
J2522_200306
This SAE Recommended Practice defines an Inertia Dynamometer Test procedure that assesses the effectiveness behavior of a friction material with regard to pressure, temperature and speed for motor vehicles fitted with hydraulic brake actuation.
Standard

Dynamometer Global Brake Effectiveness

2013-01-21
HISTORICAL
J2522_201301
This SAE Recommended Practice defines an Inertia Dynamometer Test procedure that assesses the effectiveness behavior of a friction material with regard to pressure, temperature and speed for motor vehicles fitted with hydraulic brake actuation.
Standard

Dynamometer Global Brake Effectiveness

2014-09-09
HISTORICAL
J2522_201409
This SAE Recommended Practice defines an Inertia Dynamometer Test procedure that assesses the effectiveness behavior of a friction material with regard to pressure, temperature and speed for motor vehicles fitted with hydraulic brake actuation.
Standard

Dynamometer Effectiveness Characterization Test for Passenger Car and Light Truck Brake Friction Products

1999-08-30
HISTORICAL
J2430_199908
This SAE Recommended Practice establishes an inertia dynamometer test procedure, using exemplar caliper disc or drum brakes, to characterize the effectiveness of brake friction products for passenger cars and light trucks, up to and including 3500 kg GVW. SAE J2430 provides a method of characterizing friction material effectiveness, using vehicle specific brake hardware and test conditions that approximate those for U.S. mandated new vehicle brake tests.
Standard

Dynamometer Effectiveness Characterization Test for Passenger Car and Light Truck Brake Friction Products

2012-11-19
CURRENT
J2430_201211
Ballot to Brake Effectiveness and Dynamometer Effectiveness - 11/19/98 Results of ballot: Brake Effectiveness - A-6, D-2, W-1, NR-2 Dynamometer Test Code - A-5, D-0, W-0, NR-2 Jim Trainor will send letter to the two people who disapproved and send a copy of the letter to SAE - 7/7/1999 Transmittal sent to pubs - 8/30/1999 Pre-print sent to sponsor - 10/27/1999 Signed copy sent to pubs - 11/9/1999 Published copy (AUG99) received - 01/14/2000
Standard

Disc Brake Dynamometer Squeal Noise Matrix

2001-05-14
HISTORICAL
J2521_200105
This procedure is applicable to high frequency squeal type noise occurrences for passenger car and light truck type vehicles that are used under conventional operating conditions. The procedure does not encompass the consequences associated with changes in environment related to temperature and humidity variations.
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