ASTM D6201 : 25

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

Standard Details

1.1 This test method covers an engine dynamometer test procedure for evaluation of intake valve deposit formation of unleaded spark-ignition engine fuels.2 This test method uses a Ford Ranger 2.3 L four-cylinder engine. This test method includes detailed information regarding the procedure, hardware, and operations.

1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

1.3 This test method is arranged as follows:

Subject	Section
Scope	1
Referenced Documents	2
Terminology	3
Summary of Test Method	4
Significance and Use	5
Apparatus	6
Laboratory Facilities	6.1
Engine and Cylinder Head Build-Up and Measurement Area	6.1.1
Engine Operating Area	6.1.2
Fuel Injector Testing Area	6.1.3
Intake Valve Rinsing and Parts Cleaning Area	6.1.4
Parts Rating and Intake Valve Weighing Area	6.1.5
Test Stand Laboratory Equipment	6.2
Test Stand Configuration	6.2.1
Dynamometer Speed and Load Control System	6.2.2
Intake Air Supply System	6.2.3
Exhaust System	6.2.4
Fuel Supply System	6.2.5
Engine Control Calibration	6.2.6
Ignition System	6.2.7
Engine Coolant System	6.2.8
External Oil System	6.2.9
Temperature Measurement Equipment and Locations	6.2.10
Pressure Measurement Equipment and Locations	6.2.11
Flow Measurement Equipment and Locations	6.2.12
Speed and Load Measurement Equipment and Locations	6.2.13
Exhaust Emissions Measurement Equipment and Location	6.2.14
DPFE (EGR) Voltage Measurement Equipment and Location	6.2.15
Ignition Timing Measurement Equipment and Location	6.2.16
Test Engine Hardware	6.3
Test Engine Parts	6.3.1
New Parts Required	6.3.2
Reusable Engine Parts	6.3.3
Special Measurement and Assembly Equipment	6.4
Reagents and Materials	7
Hazards	8
Preparation of Apparatus	9
Test Stand Preparation	9.1
Engine Block Preparation	9.2
Preparation of Miscellaneous Engine Components	9.3
Cylinder Head Preparation	9.4
Cylinder Head Assembly	9.5
Cylinder Head Installation	9.6
Final Engine Assembly	9.7
Calibration	10
Instrumentation Calibration	10.1
Procedure	11
Pretest Procedure	11.1
Engine Operating Procedure	11.2
Periodic Measurements and Functions	11.3
End of Test Procedures	11.4
Determination of Test Results	12
Post-Test Intake Valve Weighing Procedure	12.1
Photographs of Parts—General	12.2
Induction System Rating	12.3
Determination of Test Validity-Engine Conformance	12.4
Report	13
Precision and Bias	14
Keywords	15
Annexes
Detailed Specifications and Photographs of Apparatus	Annex A1
Engine Part Number Listing	Annex A2
Statistical Equations for Mean and Standard Deviation	Annex A3

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific warning statements are given throughout this test method.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.