Search Results

The purpose of this SAE Standard is to provide a standardized test procedure for generating engine performance maps in order to facilitate data reporting and data comparisons. An engine performance map is a listing of engine specific fuel consumption, specific exhaust emissions and other variables obtained at specific engine speeds and loads. Engine performance maps as specified by this code are primarily used in the light duty vehicle industry and can be used in fuel economy simulation programs. This document is applicable to both four-stroke spark-ignition (SI) and compression-ignition (CI) engines, naturally aspirated and pressure charged, with or without charge air cooling. The large number of control variables available on modern engines results in large flexibility in calibration, and it is frequently necessary to run part-load maps to explore the relative merits of different control strategies.

This procedure is specifically designed to determine a fuel rate versus torque map for heavy-duty spark ignition and diesel engines as determined at the DOT/SAE Truck & Bus Fuel Economy Measurement Conference April 21–23, 1975. This engine performance map, when combined with accessory losses, transmission and driveline losses, vehicle aerodynamics, etc., can be used with vehicle operating profiles in a computer program to simulate vehicle fuel economy. Use of this procedure results in torque and fuel rate being measured at 30 data points, minimum, and friction torque, either measured or calculated, at five data points, minimum. Testing is accomplished using a procedure very similar to SAE J816b, but actually is quite different since this is a specific test for a specific purpose rather than a general test code as specified in J816b. It is recommended that the test be run at inlet air temperatures as near as possible to the standard specified in J816b so as to minimize correction.

The purpose of this SAE code is to provide a standardized test procedure for generating engine performance maps. An engine performance map is a listing of engine fuel flow rates versus torque or power obtained at specific engine speeds and loads. Engine performance maps as specified by this code can be used in fuel economy simulation programs. This document is applicable to both four-stroke spark ignition (SI) and compression ignition (CI) engines, naturally aspirated and pressure charged, with or without charge air cooling.

This SAE Recommended Practice has been adopted by SAE to specify: a A standard procedure for chassis dynamometer testing of heavy-duty road vehicles for the purpose of determining power delivered through the drive tires. b A method of correcting observed power to reference test conditions. c A method of analyzing the test data to determine if the test results are within expected power ranges.

This SAE Standard has been adopted to provide a basis for dynamometer determination of gross engine power and torque under reference conditions. It is intended for use primarily by engine manufacturers who supply engines for installation by others in applications where the engine manufacturer may not control the induction and exhaust system design or the speed at which the engine is run.

This document has been adopted by SAE to specify:

This SAE Standard has been adopted by SAE to specify: a A basis for gross engine power rating b Reference inlet air and fuel supply test conditions c A method for correcting observed power to reference conditions d A method for determining gross full load engine power with a dynamometer

This SAE Standard has been adopted to provide a basis for dynamometer determination of gross engine power and torque under reference conditions. It is intended for use primarily by engine manufacturers who supply engines for installation by others in applications where the engine manufacturer may not control the induction and exhaust system design or the speed at which the engine is run.

This standard test code has been adopted by SAE to specify: (a) A laboratory engine dynamometer test procedure. (b) A basis for engine power rating. (c) A method for correcting observed power to standard inlet air conditions. The pressure and temperature correction formulas contained herein should be used only within the specified range of conditions (see paragraph 8.4.1) and are not intended for altitude derating.

This standard test code has been adopted by SAE to specify: (a) A laboratory engine dynamometer test procedure. (b) A basis for engine power rating. (c) A method for correcting observed power to standard inlet air conditions. The pressure and temperature correction formulas contained herein should be used only within the specified range of conditions (see paragraph 8.4.1) and are not intended for altitude derating.

This standard is intended to provide a method to obtain repeatable measurements that accurately reflect true engine performance in customer service. Whenever there is an opportunity for interpretation of the standard, a good faith effort shall be made to obtain the engine’s typical in-service performance and avoid finding the best possible performance under the best possible conditions. Intentional biasing of engine component or assembly tolerances to optimize performance for this test is prohibited.

This SAE Standard has been adopted by SAE to specify: a A basis for net engine power rating b Reference inlet air and fuel supply test conditions c A method for correcting observed power to reference conditions d A method for determining net full load engine power with a dynamometer

This standard is intended to provide a method to obtain repeatable measurements that accurately reflect true engine performance in customer service. Whenever there is an opportunity for interpretation of the standard, a good faith effort shall be made to obtain the engine’s typical in-service performance and avoid finding the best possible performance under the best possible conditions. Intentional biasing of engine component or assembly tolerances to optimize performance for this test is prohibited.

This standard has been adopted by SAE to specify:

This document has been adopted by SAE to specify:

This standard is intended to provide a method to obtain repeatable measurements that accurately reflect true engine performance in customer service. Whenever there is an opportunity for interpretation of the standard, a good faith effort shall be made to obtain the engine’s typical in-service performance and avoid finding the best possible performance under the best possible conditions. Intentional biasing of engine component or assembly tolerances to optimize performance for this test is prohibited.

This standard is intended to provide a method to obtain repeatable measurements that accurately reflect true engine performance in customer service. Whenever there is an opportunity for interpretation of the standard, a good faith effort shall be made to obtain the engine’s typical in-service performance and avoid finding the best possible performance under the best possible conditions. Intentional biasing of engine component or assembly tolerances to optimize performance for this test is prohibited.

This standard is intended to provide a method to obtain repeatable measurements that accurately reflect true engine performance in customer service. Whenever there is an opportunity for interpretation of the standard, a good faith effort shall be made to obtain the engine’s typical in-service performance and avoid finding the best possible performance under the best possible conditions. Intentional biasing of engine component or assembly tolerances to optimize performance for this test is prohibited.

The test procedures outlined in this SAE Standard are applicable to turbocharging systems having either fixed- or variable-geometry.

The test procedures outlined in this recommended practice are applicable to single rotor turbochargers having either fixed- or variable-geometry with the following caveat: At this stage in the development of variable-geometry (VG) turbochargers, it would be impractical to generate a detailed practice to cover all types of VG turbochargers which may evolve. However, there is a requirement to quote performance data within a stipulated degree of accuracy and to furnish comprehensive performance information. This will form a basis for this document where further refinements may be added as experience and necessity dictate.