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Dynamometer Global Brake Effectiveness
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Book Synopsis Dynamometer Global Brake Effectiveness by : Brake Dynamometer Standards Committee
Download or read book Dynamometer Global Brake Effectiveness written by Brake Dynamometer Standards Committee and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.The main purpose of SAE J2522 is to compare friction materials under the most equal conditions possible. To account for the cooling behavior of different test stands, the fade sections are temperature-controlled.
Book Synopsis Dynamometer Global Brake Effectiveness by :
Download or read book Dynamometer Global Brake Effectiveness written by and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamometer Global Brake Effectiveness by :
Download or read book Dynamometer Global Brake Effectiveness written by and published by . This book was released on 2014 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamometer Effectiveness Characterization Test for Passenger Car and Light Truck Caliper Disc Brake Friction Materials by : Brake Dynamometer Standards Committee
Download or read book Dynamometer Effectiveness Characterization Test for Passenger Car and Light Truck Caliper Disc Brake Friction Materials written by Brake Dynamometer Standards Committee and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Dynamometer Effectiveness Characterization Test for Passenger Car and Light Truck Brake Friction Products by : Brake Dynamometer Standards Committee
Download or read book Dynamometer Effectiveness Characterization Test for Passenger Car and Light Truck Brake Friction Products written by Brake Dynamometer Standards Committee and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 This Recommended Practices has been replaced by the SAE J2784 based on (1) SAE J2784's ability to better reproduce the FMVSS sequences for vehicles with Gross Vehicle Weight Rating of 4,540 kg or less, (2) industry consensus to simplify the number of dynamometer testing for performance evaluation, and (3) availability of more specific procedures to assess friction behavior (sensitivity) as a function of speed, pressure, temperature, and braking history like SAE J2522 and ISO 26867, which are used on a regular basis by the automotive industry.
Book Synopsis Wear Test Procedure on Inertia Dynamometer for Brake Friction Materials by : Brake Dynamometer Standards Committee
Download or read book Wear Test Procedure on Inertia Dynamometer for Brake Friction Materials written by Brake Dynamometer Standards Committee and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This SAE Recommended Practice specifies a dynamometer test procedure to be used for the measurement of automotive service brake linings and disc brake pads wear. The SAE J2707 Recommended Practice is widely used or referenced by multiple companies around the globe. It is part of regular testing activities with no changes indicated or requested by the industry. Newer testing methodologies and equipment do not affect the test execution. Also, there are no issues presented to the SAE Brake Dynamometer Committee to justify a formal review process.
Book Synopsis Low-duty Inertia Dynamometer Hydraulic Brake Wear Test Procedures for Vehicles Above 4536 Kg (10 000 Lb) of GVWR by : Truck and Bus Hydraulic Brake Committee
Download or read book Low-duty Inertia Dynamometer Hydraulic Brake Wear Test Procedures for Vehicles Above 4536 Kg (10 000 Lb) of GVWR written by Truck and Bus Hydraulic Brake Committee and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Recommended Practice is derived from OEM and tier-1 laboratory tests and applies to two-axle multipurpose passenger vehicles, or trucks with a GVWR above 4536 kg (10 000 pounds) equipped with hydraulic disc or drum service brakes. Before conducting testing for a specific brake sizes or under specific test conditions, review, agree upon, and document with the test requestor any deviations from the test procedure. Also, the applicable criteria for the final test results and wear rates deemed as significantly different require definition, assessment, and proper documentation; especially as this will determine whether or not Method B testing is needed.This Recommended Practice does not evaluate or quantify other brake system characteristics such as performance, noise, judder, ABS performance, or braking under extreme temperatures or speeds. Minimum performance requirements are not part of this recommended practice. Consistency and margin of pass/fail of the minimum requirements related to wear rates and wear behavior can be assessed as part of the project in coordination with the test requestor.NOTE: This Recommended Practice uses the unit conversion and rounding techniques from the NIST Special Publication 811. This to ensure the use of standard conversion factors and to determine the appropriate number of significant digits to ensure the Rounding Error (RE) of the converted unit is smaller than or similar to the RE of the original English or Imperial unit. Certain vehicle applications (like flat-bed recovery vehicles) have driving patterns which are considered light-duty with (a) friction material temperatures remaining under 232.0 °C (450 °F) 2.03 to 2.54 mm (0.08 to 0.1 inch) below the braking surface for at least 90% of the time, and (b) brake applications which require 2690 kPa (390 lbf/in2) or less of hydraulic pressure. This Recommended Practice provides two inertia-dynamometer test procedures, which are repeatable and cost-effective to assess, screen, benchmark, troubleshoot, or fingerprint a given foundation brake regarding low-duty brake wear. The first procedure (or Method A) is a wear versus temperature test from 93.0 to 427.0 °C (200 to 800 °F) to determine if there are potential wear rate issues under low temperature conditions and a low-duty driving cycle. If deemed required after the initial wear versus temperature test (Method A), or upon direct customer request, the second procedure (or Method B) provides an extensive wear test at a constant temperature of 79.0 °C (175 °F) to determine the wear rates and behavior of the friction couple. Data from this Recommended Practice may be combined with other brake system and vehicle characteristics for a comprehensive product characterization program.Since other wear test procedures cover a different (higher) range of operating temperatures, kinetic energies, and levels, the accelerated wear rate behavior of certain friction materials under low-duty regimes is not properly determined or estimated using test conditions which can affect the transfer layer behavior. The wear test method implemented in this Recommended Practice was derived from prior field testing and correlation investigation. Hence, careful attention was given to not alter the sequence and test conditions which have demonstrated correspondence to the vehicle behavior.The SAE Truck and Bus Hydraulic Brake Committee considers laboratory test procedures useful in supporting harmonization to improve the overall performance, durability, and safety of motor vehicle braking systems using relevant and cost-effective protocols.
Book Synopsis FMVSS 105 Inertia Brake Dynamometer Test Procedure for Vehicles Above 4 540 Kg GVWR by : Truck and Bus Hydraulic Brake Committee
Download or read book FMVSS 105 Inertia Brake Dynamometer Test Procedure for Vehicles Above 4 540 Kg GVWR written by Truck and Bus Hydraulic Brake Committee and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Recommended Practice is derived from the FMVSS 105 vehicle test and applies to two-axle multipurpose passenger vehicles, trucks and buses with a GVWR above 4 540 kg (10 000 lbs) equipped with hydraulic service brakes. There are two main test sequences: Development Test Sequence for generic test conditions when not all information is available or when an assessment of brake output at different inputs are required, and FMVSS Test Sequence when vehicle parameters for brake pressure as a function of brake pedal input force and vehicle-specific loading and brake distribution are available. The test sequences are derived from the Federal Motor Vehicle Safety Standard 105 (and 121 for optional sections) as single-ended inertia-dynamometer test procedures when using the appropriate brake hardware and test parameters. This recommended practice provides Original Equipment Manufacturers (OEMs), brake and component manufacturers, as well as aftermarket suppliers, results related to brake output, friction material effectiveness, and corner performance in a laboratory-controlled test environment.The test sequences include different dynamic conditions (braking speeds, temperature, and braking history as outlined in the FMVSS 105); inertia loads equivalent to the vehicle's LLVW and GVWR; fully operational, partial failure, and failed system conditions. All applicable sections of the FMVSS 105 are included. Optional sections include: parking brake output, water recovery, TP-121D dynamometer retardation, and 32 km/h (20 mph) stops to simulate Federal Motor Carrier Safety (FMCS) requirements.This Recommended Practice does not evaluate or quantify other brake system characteristics such as wear, noise, judder, ABS performance, or braking under extreme temperatures or speeds. Minimum performance requirements are not part of this recommended practice. Consistency and margin of pass/fail of the minimum requirements related to stopping distance or equivalent deceleration levels of the FMVSS 105 vehicle test can be assessed as part of the project in coordination with the test requestor when using the appropriate vehicle information and vehicle dynamics modeling. Nevertheless, this procedure and its results do not replace the vehicle-level test to demonstrate compliance to FMVSS (105 for hydraulic brake systems or 121 for air-over-hydraulic brake systems), or other mandatory regulations (like ECE R13 or equivalents). Vehicle and braking systems development is fast-paced, and involves a global supplier base. This Recommended Practice provides an inertia-dynamometer test procedure that is repeatable and cost-effective. It evaluates the performance of the brake corner and its components (including friction material) by following the test procedure and sequence as indicated in the Federal Motor Vehicle Safety Standard (FMVSS) 105. Data from this Recommended Practice may be combined with other brake system and vehicle characteristics to predict vehicle performance.Since the first release of the FMVSS 105, there have been numerous inertia-dynamometer test protocols developed and used by the industry with different approaches and levels of detail. The SAE Truck and Bus Hydraulic Brake Committee considers laboratory test procedures useful in supporting harmonization to improve the overall performance and safety of motor vehicle braking systems.
Book Synopsis Low-Duty Inertia Dynamometer Hydraulic Brake Wear Test Procedures for Vehicles Above 4536 Kg (10000 Pounds) of GVWR by : Truck and Bus Hydraulic Brake Committee
Download or read book Low-Duty Inertia Dynamometer Hydraulic Brake Wear Test Procedures for Vehicles Above 4536 Kg (10000 Pounds) of GVWR written by Truck and Bus Hydraulic Brake Committee and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Recommended Practice is derived from OEM and tier-1 laboratory tests and applies to two-axle multipurpose passenger vehicles, or trucks with a GVWR above 4536 kg (10 000 pounds) equipped with hydraulic disc or drum service brakes. Before conducting testing for a specific brake sizes or under specific test conditions, review, agree upon, and document with the test requestor any deviations from the test procedure. Also, the applicable criteria for the final test results and wear rates deemed as significantly different require definition, assessment, and proper documentation; especially as this will determine whether or not Method B testing is needed.This Recommended Practice does not evaluate or quantify other brake system characteristics such as performance, noise, judder, ABS performance, or braking under extreme temperatures or speeds. Minimum performance requirements are not part of this recommended practice. Consistency and margin of pass/fail of the minimum requirements related to wear rates and wear behavior can be assessed as part of the project in coordination with the test requestor.NOTE: This Recommended Practice uses the unit conversion and rounding techniques from the NIST Special Publication 811. This to ensure the use of standard conversion factors and to determine the appropriate number of significant digits to ensure the Rounding Error (RE) of the converted unit is smaller than or similar to the RE of the original English or Imperial unit. SAE J3006 has been reaffirmed to comply with the SAE Five-Year Review policy.
Book Synopsis FMVSS 135 Inertia Dynamometer Test Procedure by : Brake Dynamometer Standards Committee
Download or read book FMVSS 135 Inertia Dynamometer Test Procedure written by Brake Dynamometer Standards Committee and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.This Recommended Practice is the result of an industry effort to develop an inertia-dynamometer test procedure based upon the FMVSS 135 vehicle test. Results from this test provide a laboratory assessment of the brake corner performance. Data from this Recommended Practice may be combined with other brake system and vehicle characteristics to predict vehicle performance. The conditions defined in this Recommended Practice are drawn from FMVSS 135 vehicle test experience. The deceleration levels are not necessarily based on those needed to meet the requirements of the FMVSS 135. This procedure is intended to properly represent the lining conditioning which occurs during an FMVSS 135 vehicle test.
Book Synopsis Brake Effectiveness Marking for Brake Blocks - Truck and Bus by : Truck and Bus Foundation Brake Committee
Download or read book Brake Effectiveness Marking for Brake Blocks - Truck and Bus written by Truck and Bus Foundation Brake Committee and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This SAE Recommended Practice provides the method to assign numerical values of brake effectiveness, using data from single station inertia dynamometer effectiveness tests, and to identify a uniform procedure to mark these values on the edge of brake blocks in excess of 12.7 mm (0.51 in) in thickness. The procedure is set and should not be changed to keep the integrity and intent of the testing that was performed.
Book Synopsis FMVSS Inertia Dynamometer Test Procedure for Vehicles Below 4540 Kg GVWR by : Brake Dynamometer Standards Committee
Download or read book FMVSS Inertia Dynamometer Test Procedure for Vehicles Below 4540 Kg GVWR written by Brake Dynamometer Standards Committee and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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. This revised document takes into consideration new technologies for braking systems like (a) vacuum assist, (b) electric parking brake (EPB), and (c) regenerative braking. The inertia calculation references the latest version of the SAE J2789 to calculate the test inertia, including two methods to reflect the brake blending for the regenerative system. This revision also addresses formatting and grammatical corrections and clarifies items about FMVSS 105, FMVSS 135, or both. Other aspects of the rationale from previous revisions of this SAE Recommended Practice (RP) are still applicable.
Book Synopsis FMVSS 105 Inertia Brake Dynamometer Test Procedure for Vehicles Above 4540 Kg GVWR by : Truck and Bus Hydraulic Brake Committee
Download or read book FMVSS 105 Inertia Brake Dynamometer Test Procedure for Vehicles Above 4540 Kg GVWR written by Truck and Bus Hydraulic Brake Committee and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Recommended Practice is derived from the FMVSS 105 vehicle test and applies to two-axle multipurpose passenger vehicles, trucks, and buses with a GVWR above 4540 kg (10000 pounds) equipped with hydraulic service brakes. There are two main test sequences: Development Test Sequence for generic test conditions when not all information is available or when an assessment of brake output at different inputs are required, and FMVSS Test Sequence when vehicle parameters for brake pressure as a function of brake pedal input force and vehicle-specific loading and brake distribution are available. The test sequences are derived from the Federal Motor Vehicle Safety Standard 105 (and 121 for optional sections) as single-ended inertia-dynamometer test procedures when using the appropriate brake hardware and test parameters. This recommended practice provides Original Equipment Manufacturers (OEMs), brake and component manufacturers, as well as aftermarket suppliers, results related to brake output, friction material effectiveness, and corner performance in a laboratory-controlled test environment.The test sequences include different dynamic conditions (braking speeds, temperature, and braking history as outlined in the FMVSS 105); inertia loads equivalent to the vehicle's LLVW and GVWR; fully operational, partial failure, and failed system conditions. All applicable sections of the FMVSS 105 are included. Optional sections include: parking brake output, water recovery, TP-121D dynamometer retardation, and 32 km/h (20 mph) stops to simulate Federal Motor Carrier Safety Administration (FMCSA) requirements.This recommended practice does not evaluate or quantify other brake system characteristics such as wear, noise, judder, ABS performance, or braking under extreme temperatures or speeds. Minimum performance requirements are not part of this recommended practice. Consistency and margin of pass/fail of the minimum requirements related to stopping distance or equivalent deceleration levels of the FMVSS 105 vehicle test can be assessed as part of the project in coordination with the test requestor when using the appropriate vehicle information and vehicle dynamics modeling. Nevertheless, this procedure and its results do not replace the vehicle-level test to demonstrate compliance to FMVSS (105 for hydraulic brake systems, or 121 for air-over-hydraulic brake systems), or other mandatory regulations (like ECE R13 or equivalents). The current version of this Recommended Practice: (a) addresses proper and consistent use of units of measure and numerical values per NIST 811:2008, and (b) clarifies thermocouple location and temperature controls during the test. The technical content, the test conditions, and the test sequences remain unchanged.
Book Synopsis Estimation of Transport Efficiency for Brake Emissions Using Inertia Dynamometer Testing by : Carlos Agudelo
Download or read book Estimation of Transport Efficiency for Brake Emissions Using Inertia Dynamometer Testing written by Carlos Agudelo and published by . This book was released on 2018 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Air Brake Performance and Wear Test Code Commercial Vehicle Inertia Dynamometer by : Truck and Bus Foundation Brake Committee
Download or read book Air Brake Performance and Wear Test Code Commercial Vehicle Inertia Dynamometer written by Truck and Bus Foundation Brake Committee and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This SAE Standard provides test procedures for air and air-over-hydraulic disc or drum brakes used for on-highway commercial vehicles over 4536 kg (10 000 lb) of GVWR. This recommended practice includes the pass/fail criteria of Standard No. 121. This revision of the SAE J2115 includes several enhancements and fine-tuning relative to the previous version. The main objectives for the revision were to bring it closer to the FMVSS 121 dynamometer test, focus on air brake systems, and to update the wear sections to reflect current industry practices for durability testing. This revision limits the scope to air-braked vehicle applications only. There are provisions for disc and drum brakes. The test conditions include parameters and response characteristics for the servo controller on the inertia-dynamometer. The test setup provides an alternate method for measuring drum or disc bulk temperature using a 9-thermocouple array. Wear sections reflect better current industry practice for assessing wear characteristics versus temperature. The wear sections include intermediate effectiveness evaluation at the corresponding temperature step as well as a baseline temperature of 100 °C. These effectiveness sections help assess any changes or trends on brake output as an effect of the material wear and the temperature history during previous sections. Temperature steps are better harmonized with International Standards for disc brakes. Lastly, Appendix A indicates the FMVSS 121 performance requirements during the different test sections for air brake systems used on different tractors, trailers or other commercial vehicle applications.
Book Synopsis Brake Effectiveness Marking for Brake BlocksTruck and Bus by : Truck and Bus Foundation Brake Committee
Download or read book Brake Effectiveness Marking for Brake BlocksTruck and Bus written by Truck and Bus Foundation Brake Committee and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This SAE Recommended Practice provides the method to assign numerical values of brake effectiveness, using data from single station inertia dynamometer effectiveness tests, and to identify a uniform procedure to mark these values on the edge of brake blocks in excess of 12.7 mm (0.51 in) in thickness. J1801 has been reaffirmed to comply with the SAE five-year review policy.
Book Synopsis Inertia-dynamometer Disc Brake Drag Measurement Test Procedure for Vehicles Less Than 4540 Kg GVWR by : Brake Dynamometer Standards Committee
Download or read book Inertia-dynamometer Disc Brake Drag Measurement Test Procedure for Vehicles Less Than 4540 Kg GVWR written by Brake Dynamometer Standards Committee and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Recommended Practice applies to on-road vehicles with a GVWR below 4540 kg equipped with disc brakes. This Recommended Practice is the result of an industry effort to develop inertia-dynamometer test procedures to assess brake drag under a series of speed, pressure, and temperature conditions. The test allows the project or application engineer to determine or compare the amount of brake drag for a given design level or configuration. The test provides a standard method to better quantify and better understand the parasitic (drag) torque generated by the brake corner during the off-brake condition under repeatable laboratory conditions.This inertia-dynamometer test procedure provides a method to quantify brake drag measurements combining light, moderate, and severe braking with a brake drag matrix. This matrix combines increasing static preconditioning pressure applications before measuring brake drag at increasing braking speeds. Data from this test is useful to assess the influence of certain design features, determine brake sensitivity to braking conditions, and support a comprehensive brake performance evaluation in conjunction with other measurements for pedal feel, noise, performance, and durability. Elements from this recommended practice are also applicable or useful for other laboratory test procedures to assess brake drag following standard fuel economy cycles. To better characterize the brake drag behavior of a given brake corner, include other brake drag procedures which rely more on vehicle-level evaluations. These inertia dynamometer evaluations use speed profiles and test sequences to replicate coast-down testing from proving ground testing.Due to the novelty of this Recommended Practice, the Task Force encourages users of this document to contact the SAE Staff Representative for Ground Vehicle; Motor Vehicle Council; Chassis Systems Group; Foundation Brake Steering Committee, or the Chairman of the Brake Dynamometer Standards Committee with questions and comments. This feedback will prove valuable for future revisions and updates to the Recommended Practice. The Task Force is working on developing an example of the test output to present the recommended report layout.This SAE Recommended Practice is intended as a guide towards standard practices and is subject to change to keep pace with experience and technical advances.
