1. Scope--This SAE Standard has been adopted by SAE to specify:

a. A basis for gross engine power ratingb. Reference inlet air and fuel supply test conditionsc. A method for correcting observed power to reference conditionsd. A method for determining gross full load engine power with adynamometer

1.1 Field of Application--This test code document is applicable to bothfour-stroke and two-stroke spark ignition (SI) and compression ignition(CI) engines, naturally aspirated and pressure charged, with andwithout charge air cooling. This document does not apply to aircraft ormarine engines.

1.2 This test code supersedes those portions of SAE J1349 dealing withgross power rating.

1.3 Standard CI diesel fuel specifications are range mean values forType 2-D EPA test fuel per Title 40, Code of Federal Regulations, Part86.1313-87.

1.4 The corresponding test code for net power rating is SAE J1349.

1.5 The document for mapping engine performance is SAE J1312.

1.6 Relationship to ISO 2534--ISO 2534 (1972) differs from SAE J1995 inseveral areas, among which the most important are:

a. This document is not limited to road vehicles.

b. This document requires inlet fuel temperature be controlled to 40°C on CI engines.

c. This document includes a reference fuel specification and requiresthat engine power be corrected to that specification on all CI andcertain SI engines.

d. This document includes a different procedure for testing engineswith a laboratory charge air cooler (ISO method optional).

e. This document includes a different procedure for correcting power toreference atmospheric conditions on turbocharged CI engines.

1.7 Complete correlation has not been established with ISO 3046. It isexpected that this power test code will eventually align with ISO 1585and ISO 2534.

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