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Environment Vehicle dynamics Truck and Bus Brake Systems Committee Vehicles, Equipment, and Performance

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Standard

BRAKE FORCE DISTRIBUTION PERFORMANCE GUIDE—COMMERCIAL VEHICLES
1995-04-01
HISTORICAL
J1854_199504
This SAE Recommended Practice establishes performance guidelines for the threshold pressure and brake force output of the brakes on the axles of air-braked towing trucks, truck-tractors, truck-trailers, and converter dollies with GVWRs over 10 000 lb designed to be used on the highway in combination with other air-braked vehicles of this type in commercial operations.
Standard

BRAKE FORCE/DISTRIBUTION PERFORMANCE GUIDE - COMMERCIAL VEHICLES
1988-06-01
HISTORICAL
J1854_198806
This SAE Recommended Practice establishes performance guidelines for the threshold pressure and brake force output of the brakes on the axles of air braked towing trucks, truck-tractors, truck-trailers, and converter dollies with GVWRs over 10 000 lb designed to be used on the highway in combination with other air braked vehicles of this type in commercial operations.
Standard

BRAKE RATING HORSEPOWER REQUIREMENTS—COMMERCIAL VEHICLES
1997-02-01
HISTORICAL
J257_199702
The minimum performance values in this SAE Recommended Practice are applicable to vehicles with brake systems having typical service pressure ranges 0 to 14.1 MPa (0 to 2050 psi) hydraulic or 0 to 830 kPa (0 to 120 psi) air only. SAE J880 not only provides for determining maximum brake rating horsepower capability, but also permits verification of any desired or arbitrary level such as the requirement established herein. The determining criteria for deciding brake rating horsepower capability are: a Cold brake stopping ability. b Fade as a result of horsepower absorption. c Hot brake stopping ability following horsepower absorption. d Brake system stability following horsepower absorption. e Functional and structural integrity of brake system following test.
Standard

BRAKE RATING HORSEPOWER REQUIREMENTS—COMMERCIAL VEHICLES
1985-03-01
HISTORICAL
J257_198503
The minimum performance values in this recommended practice are applicable to vehicles with brake systems having typical service pressure ranges 0-1800 psi (0-12.4 MPa) hydraulic or 0-120 psi (0-0.8 MPa) air only. SAE J880 not only provides for determining maximum brake rating horsepower capability, but also permits verification of any desired or arbitrary level such as the requirement established herein. The determining criteria for deciding brake rating horsepower capability are: (a) Cold brake stopping ability. (b) Fade as a result of horsepower absorption. (c) Hot brake stopping ability following horsepower absorption. (d) Brake system stability following horsepower absorption. (e) Functional and structural integrity of brake system following test.
Standard

BRAKE RATING SYSTEM TEST CODE - COMMERCIAL VEHICLES
1963-11-01
HISTORICAL
J880_196311
The code provides test procedures and instructions for: Instrumentation and equipment. Vehicle preparation. Determining brake system energy absorption capacity. Calculation of a brake rating. The code includes provision for those vehicles, single unit, combinations, or special, which cannot be loaded to the manufacturer's rated gross vehicle weight, cannot be accelerated in the time interval required, or cannot attain the specified 50 mph speed. Methods for measuring energy absorption capacity, other than described herein, may be equally valid.
Standard

BRAKE RATING SYSTEM TEST CODE – COMMERCIAL VEHICLES
1970-06-01
HISTORICAL
J880A_197006
This code is intended for vehicles with brake systems having typical service pressure ranges 0-1800 psi hydraulic or 0-120 psi air and is not directly applicable to vehicles with other systems.
Standard

BRAKE SYSTEM PERFORMANCE REQUIREMENTS—TRUCK, BUS, AND COMBINATION OF VEHICLES
1985-03-01
HISTORICAL
J992_198503
This SAE Recommended Practice presents performance requirements for the brake systems of motor vehicles intended for roadway use and falling into the following classifications: Light trucks and buses: 6001–10 000 lb (2700–4500 kg) gvw Truck and bus: Over 10 000 lb (4500 kg) gvw Combination of vehicles [towing vehicle over 10 000 lb (4500 kg) gvw] Acceptable performance requirements are based on data obtained from applicable sections of SAE J786a (March, 1978).
Standard

BRAKE SYSTEM PERFORMANCE REQUIREMENTS—TRUCK, BUS, AND COMBINATION OF VEHICLES
1971-05-01
HISTORICAL
J992B_197105
This SAE Recommended Practice presents performance requirements for the brake systems of motor vehicles intended for roadway use and falling into the following classifications: Light trucks and buses: 6001-10,000 lb gvw Truck and bus: Over 10,000 lb gvw Combination of vehicles (towing vehicle over 10,000 lb gvw) Acceptable performance requirements are based on data obtained from applicable sections of SAE J786.
Standard

BRAKE SYSTEM PERFORMANCE REQUIREMENTS—TRUCK, BUS, AND COMBINATION OF VEHICLES
1978-03-01
HISTORICAL
J992B_197803
This SAE Recommended Practice presents performance requirements for the brake systems of motor vehicles intended for roadway use and falling into the following classifications: Light trucks and buses: 6001–10,000 lb (2700–4500 kg) gvw Truck and bus: Over 10,000 lb (4500 kg) gvw Combination of vehicles (towing vehicle over 10,000 lb (4500 kg) gvw) Acceptable performance requirements are based on data obtained from applicable sections of SAE J786a (March, 1978).
Standard

BRAKE SYSTEM RATING TEST CODE—COMMERCIAL VEHICLES
1985-03-01
HISTORICAL
J880_198503
This code is intended for vehicles with brake systems having typical service pressure ranges 0–1800 psi (0–12.4 MPa) hydraulic or 0–120 psi (0–830 kPa) air and is not directly applicable to vehicles with other systems.
Standard

BRAKE SYSTEM RATING TEST CODE—COMMERCIAL VEHICLES
1997-02-01
HISTORICAL
J880_199702
This code is intended for commercial vehicles over 4500 kg (10 000 lb) with brake systems having typical service pressure ranges 0 to 14.1 mPa (0 to 2050 psi) hydraulic or 0 to 830 kPa (0 to 120 psi) air and is not directly applicable to vehicles with other systems. Air over hydraulic systems are to be tested as air systems.
Standard

BRAKE SYSTEM ROAD TEST CODE — TRUCK, BUS, AND COMBINATION OF VEHICLES
1971-05-01
HISTORICAL
J786A_197105
This SAE Recommended Practice establishes a uniform procedure for the level road test of the brake systems of new trucks, buses, and combination of vehicles designed for roadway use and falling in the following classifications: Light trucks and buses: 6001-10,000 lb gvw Truck and bus: Over 10,000 lb gvw Combination of vehicles (towing vehicle over 10,000 lb gvw)
Standard

BRAKE SYSTEM ROAD TEST CODE—TRUCK, BUS, AND COMBINATION OF VEHICLES
1978-03-01
HISTORICAL
J786A_197803
This SAE Recommended Practice establishes a uniform procedure for the level road test of the brake systems of new trucks, buses, and combination of vehicles designed for roadway use and falling in the following classifications: Light trucks and buses: 6001-10,000 lb (2700-4500 kg) gvw Truck and bus: Over 10,000lb (4500 kg) gvw Combination of vehicles (towing vehicle over 10,000 lb (4500 kg) gvw)
Standard

BRAKE SYSTEM TORQUE BALANCE TEST CODE COMMERCIAL VEHICLE
1993-06-10
HISTORICAL
J225_199306
This SAE Recommended Practice provides a field test procedure and instructions for: a Instrumentation and Equipment b Vehicle Preparation c Test of air-braked single and combination vehicles d Calculation of brake force distribution e This test procedure is intended to be used as a field procedure. If a more refined method, utilizing laboratory equipment, is required, refer to SAE J1505.
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