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Standard Test Method for Dynamometer Evaluation of Unleaded Spark-Ignition Engine Fuel for Intake Valve Deposit Formation

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Standard Test Method for Dynamometer Evaluation of Unleaded Spark-Ignition Engine Fuel for Intake Valve Deposit Formation


1.1 This test method coves an engine dynamometer test procedure for evaluation of intake valve deposit formation of unleaded spark-ignition engine fuels. This test uses a Ford Ranger 2.3 L four-cylinder engine. The following details the procedure, hardware, and operations used for this test.

1.2 The ASTM Test Monitoring Center (TMC) is responsible for engine test stand certification as well as issuance of information letters after test method modifications are approved by Subcommittee D02.A and Committee D02. Users of this test method shall request copies of recent information letters from the TMC to ensure proper conduct of the test method.

1.3 The values stated in SI units are to be regarded as the standard. Approximate inch-pound units are shown in parenthesis for information.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine applicability of regulatory limitations prior to use. Specific precautionary statements are given throughout this test method.

1.4 This test method is arranged as follows:

Referenced Documents2
Summary of Test Method4
Significance and Use5
Laboratory Facilities6.1
Test Stand Laboratory Equipment6.2
Test Engine Hardware6.3
Special Measurement and Assembly Equipment6.4
Reagents and Materials7
Engine Oil and Assembly Lubricant7.2
Engine Coolant7.3
Solvents and Cleaners7.4
Fuel Injector Test Fluid7.5
Valve Lapping Compound7.6
Crushed Walnut Shells7.7
Specific Hazards8.1
Reference Fuel9
Reference Base Fuel Batch Approval Process9.1
Fuel Batch Analyses9.2
Fuel Batch Shipment and Storage9.3
Preparation of Apparatus10
Test Stand Preparation10.1
Engine Block Preparation10.2
Preparation of Miscellaneous Engine Components10.3
Cylinder Head Preparation10.4
Cylinder Head Assembly10.5
Cylinder Head Installation10.6
Final Engine Assembly10.7
Test Stand Calibration11.1
Instrumentation Calibration11.2
Test Procedure12
Pretest Procedure12.1
Engine Operating Procedure12.2
Periodic Measurements and Functions12.3
End of Test Procedures12.4
Determination of Test Results13
Post-test Intake Valve Weighing Procedure13.1
Photographs of Parts - General13.2
Induction System Rating13.3
Determination of Test Validity - Engine Conformance13.4
Final Test Report14
Standard Report14.1
Data Acquisition Summary Report14.2
Photographs of Specific Parts14.3
Precision and Bias15
Detailed Specifications and Photographs of ApparatusAnnex A1
Engine Part Number ListingAnnex A2


automotive spark-ignition engine fuel; deposit control additive; deposits (in internal combustion engines); intake valve deposits; ICS Number Code 75.160.20 (Liquid fuels)

To find similar documents by ASTM Volume:

05.03 (Petroleum Products and Lubricants (III): D6138 - D6971)

05.04 (Petroleum Products and Lubricants (IV): D6973 - latest)

To find similar documents by classification:

75.160.20 (Liquid fuels Including gasoline, diesel, kerosene, etc.)

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Modification Type


Publication Date

Dec. 10, 1997

Document Type

Test Method

Page Count

28 pages

Committee Number