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Transportation Systems Powertrains Design Engineering and Styling Trucks Optics Truck and Bus Powertrain Committee

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Standard

Manual Transmission Efficiency and Parasitic Loss Measurement
2000-11-02
HISTORICAL
J1540_200011
Because of the intense focus on fuel economy and fuel emission standards, it has become imperative to optimize vehicle drivetrains. In light of this, component efficiencies have become an important factor in the drivetrain decision-making process. It has therefore become necessary to develop a universal standard to judge transmission efficiency. This SAE Recommended Practice specifies a test procedure which maps torque transmittal efficiency and parasitic losses for manual transmissions. The application of this document is intended for manual transmissions used in light (class 4) through heavy truck applications with both simple and compound ratio structures. This document is separated into two parts. The first compares input and output torque throughout a specified input speed range in order to determine the overall transmission efficiency. This test is used to evaluate all forward gears; testing in reverse is optional.
Standard

MANUAL TRANSMISSION AND TRANSAXLE EFFICIENCY AND PARASITIC LOSS MEASUREMENT
1992-04-01
HISTORICAL
J1540_199204
Because of the intense focus on CAFE and fuel emission standards, optimization of the automobile drivetrain is imperative. In light of this, component efficiencies have become an important factor in the drivetrain decision-making process. It has therefore become necessary to develop a universal standard to judge transmission efficiency. This SAE Recommended Practice specifies the dynamometer test procedure which maps a manual transmission’s efficiency. The document is separated into two parts. The first compares input and output torque throughout a specified input speed range in order to determine “in-gear” transmission efficiency. The second procedure measures parasitic losses experienced while in neutral at nominal idling speeds. The application of this document is intended for passenger car and light truck. All references to transmissions throughout this document include transaxles.
Standard

Manual Transmission Efficiency and Parasitic Loss Measurement
2012-11-09
CURRENT
J1540_201211
Because of the intense focus on fuel economy and fuel emission standards, it has become imperative to optimize vehicle drivetrains. In light of this, component efficiencies have become an important factor in the drivetrain decision-making process. It has therefore become necessary to develop a universal standard to judge transmission efficiency. This SAE Recommended Practice specifies a test procedure which maps torque transmittal efficiency and parasitic losses for manual transmissions. The application of this document is intended for manual transmissions used in light (class 4) through heavy truck applications with both simple and compound ratio structures. This document is separated into two parts. The first compares input and output torque throughout a specified input speed range in order to determine the overall transmission efficiency. This test is used to evaluate all forward gears; testing in reverse is optional.
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

Exhaust Brake Dynamometer Test and Capability Rating Procedure
1998-07-01
HISTORICAL
J2458_199807
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

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

Manual Transmission Shift Patterns
2017-08-15
CURRENT
J1608_201708
Provide standard shift pattern guidelines for manual transmission shift controls in light, medium, and heavy trucks and buses.
Standard

Manual Transmission Shift Patterns
2012-11-09
HISTORICAL
J1608_201211
Provide standard shift pattern guidelines for manual transmission shift controls in light, medium, and heavy trucks and buses.
Standard

ENGINE RETARDER DYNAMOMETER TEST AND CAPABILITY RATING PROCEDURE
1994-08-01
HISTORICAL
J1621_199408
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

Engine Retarder Dynamometer Test and Capability Rating Procedure
2005-12-12
HISTORICAL
J1621_200512
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

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

NOMENCLATURE AND TERMINOLOGY FOR TRUCK AND BUS DRIVE AXLES
1991-04-01
HISTORICAL
J923_199104
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

Clutch Requirements for High-Torque Truck and Bus Engines
2018-01-18
CURRENT
J2408_201801
Although not limited to, these clutch requirements are normally used on trucks considered as Heavy Duty (Class 8). This SAE Information Report defines and discusses clutch and related component configurations which will become the subject of future SAE Recommended Practices to promote standardization of clutch installations and mounting dimensions for use with pull-type heavy-duty clutches.
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