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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

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

DYNAMOMETER EFFECTIVENESS CHARACTERIZATION TEST FOR PASSENGER CAR AND LIGHT TRUCK CALIPER DISC BRAKE FRICTION MATERIALS

1995-04-01
HISTORICAL
J1652_199504
This SAE Recommended Practice establishes an inertia dynamometer test procedure, using an exemplar caliper disc brake, to characterize the effectiveness of disc brake friction materials for passenger cars and light-duty trucks, up to and including 2700 kg (5954 lb) GVW. SAE J1652 provides a method of characterizing friction material effectiveness on a full disc brake, using test conditions that approximate those for U.S. mandated new vehicle brake tests.
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.
Standard

Disc Brake Dynamometer Squeal Noise Matrix

2003-06-03
HISTORICAL
J2521_200306
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 associate with changes in environment relate to temperature and humidity variations.
Standard

Brake Rotor Thermal Cracking Procedure for Vehicles Below 4 540 kg GVWR

2018-05-16
CURRENT
J2928_201805
This recommended practice is derived from common test sequences used within the industry. This procedure applies to all on-road passenger cars and light trucks up to 4 540 kg of GVWR. This recommended practice does not address other aspects such as performance, NVH, and durability. Test results from this recommended practice should be combined with other measurements and dynamometer tests (or vehicle-level tests), and acceptance criteria to validate a given design or configuration.
Standard

Brake Rotor Thermal Cracking Procedure for Vehicles Below 4 540 kg GVWR

2012-07-03
HISTORICAL
J2928_201207
This recommended practice is derived from common test sequences used within the industry. This procedure applies to all on-road passenger cars and light trucks up to 4 540 kg of GVWR. This recommended practice does not address other aspects such as performance, NVH, and durability. Test results from this recommended practice should be combined with other measurements and dynamometer tests (or vehicle-level tests), and acceptance criteria to validate a given design or configuration.
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

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 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.
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