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Brake Hydraulic Component Flow Rate Measurement for High Differential Pressure (>5 bar)

Hydraulic Brake Components Standards Committee
  • Ground Vehicle Standard
  • J3052_201705
  • Current
Published 2017-05-18 by SAE International in United States
This recommended practice provides a method, test set-up, and test conditions for brake hydraulic component flow rate measurement for high differential pressure (>5 bar) flow conditions. It is intended for hydraulic brake components which affect the brake fluid flow characteristics in a hydraulic brake circuit, that are part of a circuit for which the flow characteristics are important to system operation, and that are exposed to high operating pressure differentials (in the 5 to 100 bar range). Typical applications may include measurement of flow through chassis controls valve bodies, orifices in the brake system such as in flow bolts, junction blocks, and master cylinders, and through brake pipe configurations.
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Strength and Durability Testing for Automotive Hydraulic Brake Components

Hydraulic Brake Components Standards Committee
  • Ground Vehicle Standard
  • J2995_201703
  • Current
Published 2017-03-13 by SAE International in United States
To assess the strength and durability for hydraulic brake components as a function of test conditions. These conditions may include: braking torque, hill-holding, braking forces, hydraulic pressure, brake temperatures, environmental and corrosion effects, vibration, and time. This RP includes a systematic reference to other test methods and provides new test methods for durability life prediction based on the VDA 311 for operating strength for brake calipers. When using AK load collectives from vehicle testing for life prediction, the nominal vehicle life corresponds to 300000 km. Braking torques and forces take into account inputs from non-ABS, ABS, EPB, and ESC systems. It also applies to gasoline, diesel, hybrid, and electric vehicles. This RP applies to vehicles below 4540 kg of GVWR. With the appropriate engineering review and assessment for a given test program, this RP can apply (or be used) to scale the duty cycle (or special collective) to reflect regional, on-road special applications, or vehicles up to 7 tons of GVWR. Except for the AK load collectives, which have proven correlation to customer usage, the…
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Rubber Boots for Drum-Type Hydraulic Brake Wheel Cylinders

Hydraulic Brake Components Standards Committee
  • Ground Vehicle Standard
  • J1604_201512
  • Current
Published 2015-12-17 by SAE International in United States
This SAE Standard covers molded rubber boots used as end closures on drum-type wheel brake actuating cylinders to prevent the entrance of dirt and moisture, which could cause corrosion and otherwise impair wheel brake operation. The document includes performance tests of brake cylinder boots of both plain and insert types under specified conditions and does not include requirements relating to chemical composition, tensile strength, or elongation of the rubber compound. Further, it does not cover the strength of the adhesion of rubber to the insert material where an insert is used. The rubber material used in these boots is classified as suitable for operation in a temperature range of −40 to +120 °C ± 2 °C (−40 to + 248 °F ± 3.6 °F).
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Brake Hydraulic Component Low Pressure Flow Rate Measurement

Hydraulic Brake Components Standards Committee
  • Ground Vehicle Standard
  • J2994_201508
  • Current
Published 2015-08-11 by SAE International in United States
The SAE Recommended Practice specifies a standardize method and test procedure to measure low pressure differential (< 1bar) brake component brake fluid flow performance. The standard can be utilized for flow measurements across hydraulic brake components such as master cylinders, apply system to chassis controls piping, or other sources of flow restriction in the low pressure side of the hydraulic brake system. It covers materials, manufacturing processes, and general properties required to meet the wide range of service encountered in automotive application. This specification covers only low pressure differential fluid flow and does not include measurement recommended practice for High Pressure differential (> 1 bar) flows.
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Vacuum Power Assist Brake Booster Test Procedure

Hydraulic Brake Components Standards Committee
  • Ground Vehicle Standard
  • J1808_201506
  • Current
Published 2015-06-30 by SAE International in United States
This document applies to direct acting vacuum power assist brake boosters only, exclusive of the master cylinder or other brake system prime mover devices for passenger cars and light trucks [4500 kg GVW (10 000 lb)]. It specifies the test procedure to determine minimum performance and durability characteristics.
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Rubber Seals for Hydraulic Disc Brake Cylinders

Hydraulic Brake Components Standards Committee
  • Ground Vehicle Standard
  • J1603_201412
  • Current
Published 2014-12-03 by SAE International in United States
This SAE Standard describes the performance and part requirements for elastomeric seals used in highway vehicle disc brake calipers. Seals covered by this specification may be the solid section type (square, rectangular, O-ring, etc.) mounted stationary in the cylinder bore or on the movable piston. The specification contains the following major sections: a Resistance to Fluid at Elevated Temperature—Physical Stability [loose parts in 120 °C ± 2 °C (248 °F ± 3.6 °F) brake fluid for 70 h] b Resistance to Fluid at Elevated Temperature—Precipitation Characteristics [loose parts in 120 °C ± 2 °C (248 °F ± 3.6 °F) brake fluid for 70 h] c Resistance to Elevated Temperatures in Dry Air [loose parts in 175 °C ± 2 °C (347 °F ± 3.6 °F) air for 22 h] d Ambient Temperature Stroking Test [tested in brake assembly for 500 000 cycles to 7 MPa ± 0.3 MPa (1000 psi ± 50 psi)] e High Temperature Stroking Test [tested in brake assembly for 70 h (70 000 strokes) at 120 °C ± 2 °C (248…
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Brake Master Cylinder Reservoir Diaphragm Gasket

Hydraulic Brake Components Standards Committee
  • Ground Vehicle Standard
  • J1605_201411
  • Current
Published 2014-11-26 by SAE International in United States
This SAE Standard covers performance requirements and methods of test for master cylinder reservoir diaphragm gaskets that will provide a functional seal and protection from outside dirt and water.
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Structural Testing of Passenger Car and Truck Disc Brakes

Hydraulic Brake Components Standards Committee
  • Ground Vehicle Standard
  • J1713_201411
  • Current
Published 2014-11-15 by SAE International in United States
This SAE Recommended Practices specifies a procedure for determining structural strength and fatigue life of disc-brake caliper assemblies which are satisfactory for vehicle usage. It is applicable to new caliper assemblies which are employed in passenger car and truck brake systems utilizing hydraulic brake fluids. Brake design and vehicle performance requirements are not included. Specification limits are left to the discretion of the responsible manufacturer. This procedure was developed for base brake operation and does not consider some unusual effects of ABS (Anti-Lock-Brake System) or Traction Control systems which may have a significant effect on the caliper. Careful analysis of the particular type ABS and/or Traction Control should be made and additional tests may be required which are not included in this document.
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Hydraulic Wheel Cylinders for Automotive Drum Brakes

Hydraulic Brake Components Standards Committee
  • Ground Vehicle Standard
  • J101_201307
  • Current
Published 2013-07-09 by SAE International in United States
This document specifies minimum performance and durability requirements for satisfactory vehicle usage, and it is applicable to wheel cylinder assemblies from commercial production, after production shipment, shelf storage, and remanufacture (factory rebuild).
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Structural Testing of Passenger Car and Truck Disc Brakes

Hydraulic Brake Components Standards Committee
  • Ground Vehicle Standard
  • J1713_201302
  • Historical
Published 2013-02-13 by SAE International in United States
This SAE Recommended Practices specifies a procedure for determining structural strength and fatigue life of disc-brake caliper assemblies which are satisfactory for vehicle usage. It is applicable to new caliper assemblies which are employed in passenger car and truck brake systems utilizing hydraulic brake fluids. Brake design and vehicle performance requirements are not included. Specification limits are left to the discretion of the responsible manufacturer. This procedure was developed for base brake operation and does not consider some unusual effects of ABS (Anti-Lock-Brake System) or Traction Control systems which may have a significant effect on the caliper. Careful analysis of the particular type ABS and/or Traction Control should be made and additional tests may be required which are not included in this document.