SAE J2038-2000 pdf download Engine Weight, Dimensions, Center of Gravity, and Moment of Inertia
Scope-This SAE Recommended Practice has been developed to provide a uniform method for reporting theweight, dimensions, center of gravity, and moment of inertia of internal combustion engines. SAE J2038 is notintended to cover the technical interface between the engine and transmission. To locate the rear of theengine crankshaft in relationship to the rear of the flywheel housing, refer to SAE J617.
References
Applicable Publications–The following publications form a part of this specification to the extent specifiedherein. The latest issue of SAE publications shall apply.
SAE PUBLICATIONS-Available from SAE 400 Commonwealth Drive, Warrendale, PA 15096-0001
SAEJ617-Engine Flywheel Housings
SAEJ824-Engine Rotation and Cylinder Numbering
ISO PUBLICATION-Available from ANSl, 11 West 42nd Street, New York,NY 10036-8002.
ISO/DIS 1204-Reciprocating internal combustion engines-Designation of the direction of rotation and ofcylinders and valves in cylinder heads, and definition of right-hand and left- hand in-line engines andlocations of an engine.
Terminology
Basic Engine-The “basic engine” is defined as a runnable engine equipped with built-in accessories, suchas fuel, oil, and coolant pumps, emission control equipment, and includes all standard equipment as clearlydefined by each engine manufacturer, Standard equipment includes a defined or no specified SAE standardflywheel, flywheel housing, and auxiliary drives. The dry engine weight will be reported.
As Shipped Engine–The “as shipped engine” is the “basic engine” equipped with accessories required forusers’ application. A variety of options, which may include lube oil and coolant, will be included in the weightThe “as shipped engine” corresponds to the user’s specifications for a specified part number. Shipping standsand other items required for shipment are not included.
Fully Equipped Engine-A “fuly equipped engine” is an “as shipped engine” equipped with accessoriesnecessary to perform its intended service, This includes, but is not restricted to, intake air system, coolingsystem, alternator, starting motor, noise control equipment, power steering pump system, air compressor andvacuum pumps.
The manufacturer should clearly define what is included in each engine arrangement.
Weight Measurement Procedure
Engine weights should be established within t3% Various methods (actual weighing, computer analysis) maybe used to determine these weights.
Dry weight is defined as the weight of an engine that has been run and then had fluids drained. (Filters are notemptied.)
Wet weight is defined as the dry weight, plus the weight of fluids as recommended by engine manufacturer(fuel, oil, coolant). This weight may be established by weighing wet engines or by calculating weight of fluidsand adding to dry weight.
The manufacturer should clearly define what equipment is included in each engine weight, as defined in 3.2.
Dimension Measurement Procedure
Forward length of the engine is defined as the horizontal distance from the rear face of the engine cylinderblock to the front most point of the engine.
Rearward length of the engine is defined as the horizontal distance from the rear face of the engine cylinderblock to the rearmost point of the engine.
Overall length of the engine is the sum of 5,1 and 5.2
Upper height of the engine is defined as the vertical distance from the centerline of the crankshaft upward tothe highest point on the engine.
Lower height of the engine is defined as the vertical distance from the centerline of the crankshaft downward tothe lowest point on the engine.
Overall height of the engine is the sum of 5.4 and 5.5.
Left side width is defined as the horizontal distance from the centerline of the crankshaft to the widest point onthe left side of the engine.Refer to SAE J824 or SO/DIS 1204 for definition of right and left side of engine.
Riaht side width is defined as the horizontal distance from the centerline of the crankshaft to the widest pointon the right side of the engine. Refer to SAE J824 or ISO/DIS 1204 for definition of right and left side of engine
Overall width of the engine is the sum of 5.7 and 5.8.
Center of Gravity Location and Dimensioning Procedure
The center of gravity of a basic engine, as shipped engine, or fully equipped engine is the point at which all theweight of the engine or engine package can be considered to be concentrated.
The center of gravity of an engine or engine package is located from three reference planes.
SAE J2038-2000 pdf download
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