• ASTM D8279-21

ASTM D8279-21

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

ASTM International, 01/01/2021

Publisher: ASTM

File Format: PDF

$44.00$88.00


Published:01/01/2021

Pages:66

File Size:1 file , 2.4 MB

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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:''

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''

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