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ASTM International - ASTM D8279-20

Standard Test Method for Determination of Timing-Chain Wear in a Turbocharged, Direct-Injection, Spark-Ignition, Four-Cylinder Engine

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Organization: ASTM International
Publication Date: 1 May 2020
Status: inactive
Page Count: 66
ICS Code (Road vehicle systems in general): 43.040.01
significance And Use:

5.1 This test method evaluates an automotive engine oil's lubricating efficiency in inhibiting timing-chain lengthening under operating conditions selected to accelerate timing-chain wear. Varying... View More

scope:

1.1 Undesirable timing-chain wear has been observed with gasoline, turbocharged, direct-injection (GTDI) engines in field service, and data from correlating laboratory engine tests have shown that chain wear can be affected by appropriately formulated engine lubricating. A laboratory engine test has been developed to provide a means for screening lubricating oils for that specific purpose. The laboratory engine test is 216 h in length, conducted under varying conditions, and the increase in timing-chain length determined at the end of test is the primary result. This test method is commonly known as the Sequence X, Chain Wear (CW) Test.

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.

1.2.1 Exception-Where there is no direct SI equivalent such as screw threads, national pipe threads/diameters, tubing size, or specified single source equipment.

1.3 Table of Contents: 

  Section
Scope 1
Referenced Documents 2
Terminology 3
Summary of Test Method 4
Significance and Use 5
Apparatus 6
 Test Engine 6.1
Reagents and Materials 7
Preparation of Apparatus 8
 Timing-chain Preparation, Installation, and Measurement 8.20
 Test Stand Installation 8.21
 Electronic Throttle Controller 8.21.17
 Temperature Measurement 8.23
 Pressure Measurement 8.24
 Flowrate Measurement 8.25
 Blowby Flowrate 8.26
Stand Calibration 9
Test Procedure 10
 Pre-Test Procedure and Engine Break-In 10.1
 Engine Start-up Procedures 10.2
 Test Sequence 10.3
 Engine Shutdown Procedures 10.4
 Blowby Flowrate Measurement 10.5
 Parameter Logging 10.6
 Oil Consumption Calculation 10.7
 General Maintenance 10.8
 Special Maintenance Procedures 10.9
 Blowby Flowrate Adjustment 10.10
Diagnostic Data Review 11
Test Results 12
Report 13
Precision and Bias 14
Keywords 15
ANNEXES  
ASTM TMC Organization Annex A1
ASTM TMC: Calibration Procedures Annex A2
ASTM TMC: Maintenance Activities Annex A3
ASTM TMC: Related Information Annex A4
Engine and Stand Parts Annex A5
Safety Precautions Annex A6
Engine Rebuild Templates Annex A7
Engine Build Records Annex A8
Cylinder Head Build A8.1
Cylinder Bore Measurement A8.2
Bearing Journal Measurements A8.3
Engine Part Photographs, Schematics and Figures Annex A9
Control and Data Acquisition Requirements Annex A10
Dipstick Oil Level to Charge Conversions Annex A11
Sequence X Report Forms and Data Acquisition Annex A12
APPENDIXES  
Sources of Materials and Information Appendix X1
Suggested Designs for Engine Fixing Brackets Appendix X2

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.

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.

Document History

January 1, 2021
Standard Test Method for Determination of Timing-Chain Wear in a Turbocharged, Direct-Injection, Spark-Ignition, Four-Cylinder Engine
1.1 Undesirable timing-chain wear has been observed with gasoline, turbocharged, direct-injection (GTDI) engines in field service, and data from correlating laboratory engine tests have shown that...
June 1, 2020
Standard Test Method for Determination of Timing-Chain Wear in a Turbocharged, Direct-Injection, Spark-Ignition, Four-Cylinder Engine
1.1 Undesirable timing-chain wear has been observed with gasoline, turbocharged, direct-injection (GTDI) engines in field service, and data from correlating laboratory engine tests have shown that...
ASTM D8279-20
May 1, 2020
Standard Test Method for Determination of Timing-Chain Wear in a Turbocharged, Direct-Injection, Spark-Ignition, Four-Cylinder Engine
1.1 Undesirable timing-chain wear has been observed with gasoline, turbocharged, direct-injection (GTDI) engines in field service, and data from correlating laboratory engine tests have shown that...
July 1, 2019
Standard Test Method for Determination of Timing-Chain Wear in a Turbocharged, Direct-Injection, Spark-Ignition, Four-Cylinder Engine
1.1 Undesirable timing-chain wear has been observed with gasoline, turbocharged, direct-injection (GTDI) engines in field service, and data from correlating laboratory engine tests have shown that...
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