Search Results

Standard

Recommended Practice for Measuring Fuel Economy and Emissions of Hybrid-Electric and Conventional Heavy-Duty Vehicles

2020-05-15

CURRENT

J2711_202005

This SAE Recommended Practice was established to provide an accurate, uniform, and reproducible procedure for simulating use of MD/HD conventional vehicles (CVs) and hybrid-electric vehicles (HEVs), as well as plug-in hybrid-electric vehicles (PHEVs) and battery electric vehicles (BEVs) on powertrain dynamometers for the purpose of measuring emissions and fuel economy. This document does not specify which emissions constituents to measure (e.g., HC, CO, NOx, PM, CO2), as that decision will depend on the objectives of the tester. While the main focus of this procedure is for calculating fuel and energy consumption, it is anticipated that emissions may also be recorded during execution of this procedure. It should be noted that most MD/HD powertrains addressed in this document would be powered by engines that are certified separately for emissions. The engine certification procedure appears in the Code of Federal Regulations, Title 40 §86 and §1065.

Standard

Recommended Practice for Measuring Fuel Economy and Emissions of Hybrid-Electric and Conventional Heavy-Duty Vehicles

2018-07-23

HISTORICAL

J2711_201807

This SAE Recommended Practice was established to provide an accurate, uniform and reproducible procedure for simulating use of heavy-duty hybrid-electric vehicles (HEVs) and conventional vehicles on dynamometers for the purpose of measuring emissions and fuel economy. Although the recommended practice can be applied using any driving cycle, the practice recommends three cycles: the Manhattan cycle, representing low-speed transit bus operation; the Orange County Transit Cycle, representing intermediate-speed bus operation; and the Urban Dynamometer Driving Schedule (UDDS) cycle representing high-speed operation for buses and tractor-trailers. This document does not specify which emissions constituents to measure (e.g., HC, CO, NOx, PM, CO2), as that decision will depend on the objectives of the tester.

Standard

Snap-Acceleration Smoke Test Procedure for Heavy-Duty Diesel Powered Vehicles

2018-02-15

CURRENT

J1667_201802

This SAE Recommended Practice applies to vehicle exhaust smoke measurements made using the Snap-Acceleration test procedure. Because this is a non-moving vehicle test, this test can be conducted along the roadside, in a truck depot, a vehicle repair facility, or other test facilities. The test is intended to be used on heavy-duty trucks and buses powered by diesel engines. It is designed to be used in conjunction with smokemeters using the light extinction principle of smoke measurement. This procedure describes how the snap-acceleration test is to be performed. It also gives specifications for the smokemeter and other test instrumentation and describes the algorithm for the measurement and quantification of the exhaust smoke produced during the test. Included are discussions of factors which influence snap-acceleration test results and methods to correct for these conditions.

Standard

Openings for Six- and Eight-Bolt Truck Transmission Mounted Power Take-Offs

2017-11-03

CURRENT

J704_201711

The accompanying mounting and gear locations are applicable for all general installations of power take-off on the transmission gear box of motor trucks and tractors where the size of the transmission permits. The heavy-duty type opening can be adapted to the regular-duty type by the use of an adapter with 6.35 mm (0.25 in) flange thickness with appropriate bolt pattern and thread engagement. (See Figures 1 and 2.)

Standard

Rating of Winches

2017-11-03

CURRENT

J706_201711

This SAE Standard applies only to new winches which are primarily designed for intermittent pulls and lifts and whose configuration and condition are the same as when they were shipped by the manufacturer. They are not intended to be used in any manner for the movement of personnel. They may be driven by any power source recommended by the manufacturer and will be capable of being powered in either direction. They will be equipped with an automatic safety brake system to control a load when lowering under power and positively hold a load when power is not being delivered to the winch. A hydraulic flow control valve or similar device may be used in the brake system to control a load when lowering under power. A clutch to release the drum for “free-spooling” may be provided and will be designed not to disengage itself under load. A drag brake may be provided to control “free-spooling,” but will not be relied on to control or hold a load.

Standard

Clutch Application Powertrain Startability Rating Requirements for Truck and Bus Applications

2017-09-19

CURRENT

J2469_201709

Although not limited to, these installations are normally used on trucks considered as Medium Duty (Class 6 and 7), as well as Heavy Duty (Class 8).

Standard

Vehicle Idle Gear Rattle Evaluation Procedure

2017-09-19

CURRENT

J2555_201709

This SAE Standard describes a procedure to be used to evaluate a disturbance known as “idle gear rattle” which can exist in vehicles equipped with manual transmissions and clutches. Other types of noises associated with operation at idle are also briefly described.

Standard

Recommended Practice for the Design and Test of Hybrid Electric and Electric Trucks and Buses for Electrical Safety

2014-04-21

CURRENT

J2910_201404

This document will cover the aspects of the design and test of Class 4 through 8 electric and hybrid-electric trucks and buses for electrical safety. The document is intended to address the safety concerns of electrical systems in commercial vehicles that employ voltages greater than 60 VDC or 30 VAC RMS.

Standard

Hydraulic Hybrid Terminology and Definitions

2012-11-21

CURRENT

J2898_201211

As the number of Hydraulic Hybrid Powertrain equipped motor vehicles has increased, the number of terms, abbreviations, and acronyms which describe various components of these systems has increased. For the sake of industry standardization and to bring some order to the proliferation of such terms, abbreviations, and acronyms, the SAE Truck and Bus Hydraulic Hybrid committee prepared this document.

Standard

Automotive Pull-Type Clutch Terminology

2012-11-09

CURRENT

J1479_201211

This SAE Standard describes the terms or names of the parts, characteristics, and parameters of automotive pull-type clutches used in trucks, and of vehicle apparatus or components related to the pull-type clutch.

Standard

Exhaust Brake Dynamometer Test and Capability Rating Procedure

2012-07-02

CURRENT

J2458_201207

This SAE Recommended Practice has been adopted by SAE to specify: a A basis for net engine retarder power rating b Reference inlet air test conditions c A method for correcting observed engine retarder power to reference conditions d A method for determining net engine retarder power with a dynamometer

Standard

Engine Retarder Dynamometer Test and Capability Rating Procedure

2012-07-02

CURRENT

J1621_201207

This SAE Recommended Practice has been adopted by SAE to specify: a A basis for net engine retarder power rating b Reference inlet air test conditions c A method for correcting observed engine retarder power to reference conditions d A method for determining net engine retarder power with a dynamometer

Standard

Clutch Application Powertrain Startability Rating Requirements for Truck and Bus Applications

2004-08-25

HISTORICAL

J2469_200408

Although not limited to, these installations are normally used on trucks considered as Medium Duty (Class 6 and 7), as well as Heavy Duty (Class 8).

Standard

Rating of Winches

2003-08-29

HISTORICAL

J706_200308

This SAE Standard applies only to new winches which are primarily designed for intermittent pulls and lifts and whose configuration and condition are the same as when they were shipped by the manufacturer. They are not intended to be used in any manner for the movement of personnel. They may be driven by any power source recommended by the manufacturer and will be capable of being powered in either direction. They will be equipped with an automatic safety brake system to control a load when lowering under power and positively hold a load when power is not being delivered to the winch. A hydraulic flow control valve or similar device may be used in the brake system to control a load when lowering under power. A clutch to release the drum for “free-spooling” may be provided and will be designed not to disengage itself under load. A drag brake may be provided to control “free-spooling,” but will not be relied on to control or hold a load.

Standard

Recommended Practice for Measuring Fuel Economy and Emissions of Hybrid-Electric and Conventional Heavy-Duty Vehicles

2002-09-20

HISTORICAL

J2711_200209

This SAE Recommended Practice was established to provide an accurate, uniform and reproducible procedure for simulating use of heavy-duty hybrid-electric vehicles (HEVs) and conventional vehicles on dynamometers for the purpose of measuring emissions and fuel economy. Although the recommended practice can be applied using any driving cycle, the practice recommends three cycles: the Manhattan cycle, representing low-speed transit bus operation; the Orange County Transit Cycle, representing intermediate-speed bus operation; and the Urban Dynamometer Driving Schedule (UDDS) cycle representing high-speed operation for buses and tractor-trailers. This document does not specify which emissions constituents to measure (e.g., HC, CO, NOx, PM, CO2), as that decision will depend on the objectives of the tester.

Standard

Manual Transmission Shift Patterns

2001-09-07

HISTORICAL

J1608_200109

Provide standard shift pattern guidelines for manual transmission shift controls in light, medium, and heavy trucks and buses.

Standard

Nomenclature and Terminology for Truck and Bus Drive Axles

2001-08-03

HISTORICAL

J923_200108

This SAE Recommended Practice outlines basic nomenclature in common use for truck and bus drive axle designs. Over a period of years there have been many different designs introduced; however, for this report, only the most common have been selected and only their general construction is illustrated to show the nomenclature of the various parts.

Standard

Axle Efficiency Test Procedure

2001-04-27

CURRENT

J1266_200104

Data from this SAE Recommended Practice permit mapping axle efficiency and/or waste energy over the operating range of trucks, busses, and other highway vehicles based on truck chasses.

Standard

Vehicle Idle Gear Rattle Evaluation Procedure

2000-11-01

HISTORICAL

J2555_200011

This SAE Standard describes a procedure to be used to evaluate a disturbance known as “idle gear rattle” which can exist in vehicles equipped with manual transmissions and clutches. Other types of noises associated with operation at idle are also briefly described.

Standard

Openings for Six- and Eight-Bolt Truck Transmission Mounted Power Take-Offs

2000-09-07

HISTORICAL

J704_200009

The accompanying mounting and gear locations are applicable for all general installations of power take-off on the transmission gear box of motor trucks and tractors where the size of the transmission permits. The heavy-duty type opening can be adapted to the regular-duty type by the use of an adapter with 6.35 mm (0.25 in) flange thickness with appropriate bolt pattern and thread engagement. (See Figures 1 and 2.)