【国外标准】 Standard Test Method for Dynamometer Evaluation of Unleaded Spark-Ignition Engine Fuel for Intake Valve Deposit Formation

5.1 Test Method—The Coordinating Research Council sponsored testing to develop this test method to evaluate a fuel's tendency to form intake valve deposits.5.1.1 State and Federal Legislative and Regulatory Action—Regulatory action by California Air Resources Board (CARB)9 and the United States Environmental Protection Agency (EPA)10 necessitate the acceptance of a standardized test method to evaluate the intake system deposit forming tendency of an automotive spark-ignition engine fuel.5.1.2 Relevance of Results—The operating conditions and design of the engine used in this test method are not representative of all engines. These factors shall be considered when interpreting test results.5.2 Test Validity: 5.2.1 Procedural Compliance—The test results are not considered valid unless the test is completed in compliance with all requirements of this test method. Deviations from the parameter limits presented in Sections 12 – 14 will result in an invalid test. Apply engineering judgment during conduct of the test method when assessing any anomalies to ensure validity of the test results.5.2.2 Engine Compliance—A test is not considered valid unless the test engine meets the quality control inspection requirements as described in Sections 10 and 12.1.1 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 ASTM Test Monitoring Center (TMC)3 is responsible for engine test stand calibration as well as issuance of information letters after test method modifications are approved by Subcommittee D02.A0 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 standard. The values given in parentheses after SI units are provided for information only and are not considered standard.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 test method is arranged as follows:Subject Section 1Referenced Documents 2Terminology 3Summary of Test Method 4 5Apparatus 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 6.4Reagents and Materials 7Hazards 8Reference Fuel 9Preparation of Apparatus 10 Test Stand Preparation 10.1 Engine Block Preparation 10.2 Preparation of Miscellaneous Engine Components 10.3 Cylinder Head Preparation 10.4 Cylinder Head Assembly 10.5 Cylinder Head Installation 10.6 Final Engine Assembly 10.7Calibration 11 Test Stand Calibration 11.1 Instrumentation Calibration 11.2Procedure 12 Pretest Procedure 12.1 Engine Operating Procedure 12.2 Periodic Measurements and Functions 12.3 End of Test Procedures 12.4Determination of Test Results 13 Post-Test Intake Valve Weighing Procedure 13.1 Photographs of Parts—General 13.2 Induction System Rating 13.3 Determination of Test Validity-Engine Conformance 13.4Report 14Precision and Bias 15Keywords 16Annexes  Detailed Specifications and Photographs of Apparatus Annex A1Engine Part Number Listing Annex A2Statistical Equations for Mean and Standard Deviation Annex A31.6 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.