ASTM-D8279 2022

$67.71

D8279-22a Standard Test Method for Determination of Timing-Chain Wear in a Turbocharged, Direct-Injection, Spark-Ignition, Four-Cylinder Engine

Published By	Publication Date	Number of Pages
ASTM	2022	63

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Categories: 43.040.01 - Road vehicle systems in general, ASTM

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Description

ASTM D8279-22a

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

ASTM D8279

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:

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.

Keywords

blowby; chain elongation; chain wear; engine oil; ramp; timing chain; turbocharger;

ICS Code

ICS Number Code 43.040.01 (Road vehicle systems in general)

DOI: 10.1520/D8279-22A

Additional information

Significance and Use	5
ASTM TMC Organization	Annex A1
Temperature Measurement	8.23
Blowby Flowrate Adjustment	10.10
ASTM TMC: Related Information	Annex A4
Blowby Flowrate Measurement	10.5
Test Engine	6.1
Preparation of Apparatus	8
Reagents and Materials	7
Terminology	3
Keywords	15
Engine Part Photographs, Schematics and Figures	Annex A9
Engine Rebuild Templates	Annex A7
Suggested Designs for Engine Fixing Brackets	Appendix X2
APPENDIXES
Precision and Bias	14
Test Sequence	10.3
Report	13
Sources of Materials and Information	Appendix X1
Pressure Measurement	8.24
Special Maintenance Procedures	10.9
Scope	1
Test Procedure	10
Electronic Throttle Controller	8.21.17
Stand Calibration	9
Blowby Flowrate	8.26
Timing-chain Preparation, Installation, and Measurement	8.20
Engine Shutdown Procedures	10.4
ANNEXES
Cylinder Bore Measurement	A8.2
Pre-Test Procedure and Engine Break-In	10.1
Sequence X Report Forms and Data Acquisition	Annex A12
ASTM TMC: Calibration Procedures	Annex A2
ASTM TMC: Maintenance Activities	Annex A3
Engine and Stand Parts	Annex A5
Safety Precautions	Annex A6
Engine Start-up Procedures	10.2
General Maintenance	10.8
Diagnostic Data Review	11
Parameter Logging	10.6
Summary of Test Method	4
	Section
Bearing Journal Measurements	A8.3
Control and Data Acquisition Requirements	Annex A10
Apparatus	6
Test Stand Installation	8.21
Engine Build Records	Annex A8
Flowrate Measurement	8.25
Test Results	12
Dipstick Oil Level to Charge Conversions	Annex A11
Referenced Documents	2
Oil Consumption Calculation	10.7
Cylinder Head Build	A8.1
ICS Codes	43.040.01 - Road vehicle systems in general