Norm

ASTM D8256 - 20 en

Standard Test Method for Evaluation of Automotive Engine Oils for Inhibition of Deposit Formation in the Sequence VH Spark-Ignition Engine Fueled with Gasoline and Operated Under Low-Temperature, Light-Duty Conditions

105,04 114,49 Incl BTW

Over deze norm

Status Definitief
Aantal pagina's 90
Gepubliceerd op 01-05-2020
Taal Engels

1.1 This test method is commonly referred to as the Sequence VH test, and it has been correlated with the Sequence VG test. The Sequence VG test was previously correlated with vehicles used in stop-and-go service prior to 1996, particularly with regard to sludge and varnish formation.3 It is one of the test methods required to evaluate oils intended to satisfy the API SN, SN Plus performance category.

1.2 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this 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 A table of contents follows:

 

Section

Scope

1

Referenced Documents

2

Terminology

3

Summary of Test Method

4

Significance and Use

5

Apparatus (General Description)

6

Apparatus (The Test Engine)

7

Sequence VH Test Engine

7.1

Required New Engine Parts

7.2

Reusable Engine Parts

7.3

Specially Fabricated Engine Parts

7.4

Special Engine Measurement and Assembly Equipment

7.5

Miscellaneous Engine Components—Preparation

7.6

Solvents and Cleaners Required

7.7

Assembling the Test Engine—Preparations

7.8

Assembling the Test Engine—Installations

7.9

Engine Installation on the Test Stand

7.10

Engine Fluids (Supply/Discharge Systems)

8

Intake Air

8.1

Fuel and Fuel System

8.2

Engine Oil and Engine Oil System

8.3

Coolants

8.4

Measurement Instrumentation

9

Temperatures

9.1

Pressures

9.2

Flow Rates

9.3

Fuel Consumption

9.4

Speed and Torque

9.5

Exhaust Gas

9.6

Humidity

9.7

Miscellaneous Laboratory Equipment

10

Test Stand Calibration

11

Test Procedure

12

Pre-Test Procedure

12.1

Engine Operating Procedure

12.2

Periodic Measurements and Functions

12.3

Special Maintenance Procedures

12.4

Diagnostic Data Review

12.5

End of Test Procedure

12.6

Interpretation of Test Results

13

Parts Rating Area—Environment

13.1

Sludge Ratings

13.2

Varnish Ratings

13.3

Clogging

13.4

Sticking

13.5

Used Oil Analyses

13.6

Assessment of Test Validity

14

General

14.1

Used Oil Analyses—Interpretation

14.2

Blowby Flow Rate

14.3

Manifold Absolute Pressure (MAP)

14.4

Fuel Consumption Rate

14.5

Oil Consumption

14.6

Engine Parts Replacement

14.7

Quality Index

14.8

Final Test Report

15

Report Forms

15.1

Precision and Bias

16

Keywords

17

ANNEXES

 

ASTM TMC: Organization

Annex A1

ASTM TMC: Calibration Procedures

Annex A2

ASTM TMC: Maintenance Activities

Annex A3

ASTM TMC: Related Information

Annex A4

Safety Precautions

Annex A5

Control and Data Acquisition Requirements

Annex A6

Detailed Specifications and Photographs of Apparatus

Annex A7

Test Engine Part Number, Classification, and Usage Guidelines

Annex A8

External Oil Heat Exchanger Cleaning Technique

Annex A9

Sequence VH Report Forms and Data Dictionary

Annex A10

Dipstick Calibration

Annex A11

Critical Part Supplier List

Annex A12

Operational Data Log—Engine Oil

Annex A13

Rating Worksheets

Annex A14

Fuel Injector Flow Measurements

Annex A15

APPENDIXES

 

Piston and Ring Measurements Record Forms

Appendix X1

Sources of Materials and Information

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. Specific hazard statements are given in 7.7, 7.7.1, 7.7.2, 7.7.3, 7.7.4, 7.7.5, A5.3.4, and A5.3.5.5.

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.

Details

ICS-code 75.100
Engelse titel Standard Test Method for Evaluation of Automotive Engine Oils for Inhibition of Deposit Formation in the Sequence VH Spark-Ignition Engine Fueled with Gasoline and Operated Under Low-Temperature, Light-Duty Conditions
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