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ASTM D7468 - 13


ASTM D7468 - 13 Standard Test Method for Cummins ISM Test


Active Standard ASTM D7468 Developed by Subcommittee: D02.B0 |Book of Standards Volume: 05.04

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ASTM D7468

Significance and Use

5.1 This test method was developed to assess the performance of an engine oil to control engine wear and deposits under heavy-duty operating conditions selected to accelerate soot generation, valve train wear, and deposit formation in a turbocharged, aftercooled four-stroke-cycle diesel engine equipped with exhaust gas recirculation hardware.

5.2 This test method can be used for engine oil specification acceptance when all details of this test method are in compliance. Applicable engine oil service categories are included in Specification D4485.

5.3 The design of the engine used in this test method is representative of many, but not all, modern diesel engines. This factor, along with the accelerated operating conditions needs to be considered when extrapolating test results.

1. Scope

1.1 The test method covers a heavy-duty diesel engine test procedure conducted under high soot conditions to evaluate oil performance with regard to valve train wear, top ring wear, sludge deposits, and oil filter plugging in an EGR environment. This test method is commonly referred to as the Cummins ISM Test.2

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.2.1 Exception—The only exception is where there is no direct SI equivalent such as screw threads, national pipe threads/diameters, tubing sizes, or where there is a sole source of supply equipment specification.

1.3 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 and health practices and determine the applicability of regulatory limitations prior to use. See Annex A1 for general safety precautions.

1.4 Table of Contents:

 

Section

Scope

1

Referenced Documents

2

Terminology

3

Summary of Test Method

4

Significance and Use

5

Apparatus

6

 Test Engine Configuration

6.1

  Test Engine

6.1.1

  Oil Heat Exchanger, Adapter Blocks, Block Off Plate

6.1.2

  Oil Filter Head Modification

6.1.3

  Oil Pan Modification

6.1.4

  Engine Control Module (ECM)

6.1.5

  Engine Position Sensor

6.1.6

  Intake Manifold Temperature Sensor

6.1.7

  Barometric Pressure Sensor

6.1.8

  Turbocharger Controller

6.1.9

  Power Supply Voltage

6.1.10

  Air Compressor and Fuel Pump

6.1.11

  Engine Block Preparation

6.1.12

 Test Stand Configuration

6.2

  Engine Mounting

6.2.1

  Intake Air System

6.2.2

  Aftercooler

6.2.3

  Exhaust System

6.2.4

  Exhaust Gas Recirculation System

6.2.5

  Fuel System

6.2.6

  Coolant System

6.2.7

  Pressurized Oil Fill System

6.2.8

  External Oil System

6.2.9

  Crankcase Aspiration

6.2.10

  Blowby Rate

6.2.11

 System Time Responses

6.3

 Oil Sample Containers

6.4

 Mass Balance

6.5

Engine and Cleaning Fluids

7

 Test Oil

7.1

 Test Fuel

7.2

 Engine Coolant

7.3

 Pentane

7.4

 Solvent

7.5

Preparation of Apparatus

8

 Cleaning of Parts

8.1

  General

8.1.1

  Engine Block

8.1.2

  Cylinder Head

8.1.3

  Rocker Cover and Oil Pan

8.1.4

  External Oil System

8.1.5

  Crosshead Cleaning and Measurement

8.1.6

  Rod Bearing Cleaning and Measurement

8.1.7

  Ring Cleaning and Measurement

8.1.8

  Injector Adjusting Screw Cleaning and Measurement

8.1.9

 Engine Assembly

8.2

  General

8.2.1

  Parts Reuse and Replacement

8.2.2

  Build-Up Oil

8.2.3

  Coolant Thermostat

8.2.4

  Oil Thermostat

8.2.5

  Fuel Injectors

8.2.6

  New Parts

8.2.7

 Operational Measurements

8.3

  Units and Formats

8.3.1

  Instrumentation Calibration

8.3.2

  Temperatures

8.3.3

  Pressures

8.3.4

  Flow Rates

8.3.5

  Intake and Exhaust CO2 Measurement

8.3.6

Engine/Stand Calibration and Non-Reference Oil Tests

9

 General

9.1

 New Test Stand

9.2

  New Test Stand Calibration

9.2.1

 Stand Calibration Period

9.3

 Stand Modification and Calibration Status

9.4

 Test Numbering System

9.5

  General

9.5.1

  Reference Oil Tests

9.5.2

  Non-Reference Oil Tests

9.5.3

 Reference Oil Test Acceptance

9.6

 Reference Oil Accountability

9.7

 Last Start Date

9.8

 Donated Reference Oil Test Programs

9.9

 Adjustments to Reference Oil Calibration Periods

9.10

  Procedural Deviations

9.10.1

  Parts and Fuel Shortages

9.10.2

  Reference Oil Test Data Flow

9.10.3

  Special Use of the Reference Oil Calibration System

9.10.4

Test Procedure

10

 Engine Installation and Stand Connections

10.1

 Coolant System Fill

10.2

 Oil Fill for Break-in

10.3

  Engine Build Committed

10.3.3

 Fuel Samples

10.4

 Engine Warm-up

10.5

  Shutdown During Warm-up

10.5.1

 Engine Break-in

10.6

 Shutdown and Maintenance

10.7

  Normal Shutdown

10.7.1

  Emergency Shutdown

10.7.2

  Maintenance

10.7.3

  Downtime

10.7.4

 200-h Test Procedure

10.8

  Oil Fill for Test

10.8.2

  Operating Conditions

10.8.4

  Injection Timing Change

10.8.5

  Mass % Soot Validity

10.8.6

  Test Timer

10.8.7

  Operational Data Acquisition

10.8.8

  Oil Sampling

10.8.9

  Oil Addition

10.8.10

 End of Test (EOT)

10.9

  Engine Disassembly

10.9.3

Calculations, Ratings and Test Validity

11

 Crosshead Mass Loss

11.1

  Crosshead Mass Loss Correction Factor

11.1.8

 Injector Adjusting Screw Mass Loss

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D524 Test Method for Ramsbottom Carbon Residue of Petroleum Products

D613 Test Method for Cetane Number of Diesel Fuel Oil

D664 Test Method for Acid Number of Petroleum Products by Potentiometric Titration

D976 Test Method for Calculated Cetane Index of Distillate Fuels

D1319 Test Method for Hydrocarbon Types in Liquid Petroleum Products by Fluorescent Indicator Adsorption

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D2622 Test Method for Sulfur in Petroleum Products by Wavelength Dispersive X-ray Fluorescence Spectrometry

D2709 Test Method for Water and Sediment in Middle Distillate Fuels by Centrifuge

D4052 Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter

D4175 Terminology Relating to Petroleum, Petroleum Products, and Lubricants

D4294 Test Method for Sulfur in Petroleum and Petroleum Products by Energy Dispersive X-ray Fluorescence Spectrometry

D4485 Specification for Performance of Active API Service Category Engine Oils

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D5453 Test Method for Determination of Total Sulfur in Light Hydrocarbons, Spark Ignition Engine Fuel, Diesel Engine Fuel, and Engine Oil by Ultraviolet Fluorescence

D5967 Test Method for Evaluation of Diesel Engine Oils in T-8 Diesel Engine

E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

E178 Practice for Dealing With Outlying Observations

National Archives and Records Administration

Code of Federal Regu Title 40 Part 86.310-79 Available from Superintendent of Documents, Attn: New Orders, P.O. Box 371954, Pittsburgh, PA 15250-7954. Charge orders may be telephoned to the Government Printing Office order desk.


Keywords

crosshead wear; Cummins ISM; de-rate protocols; diesel engine oil; exhaust gas recirculation; lubricants; oil filter delta pressure; sludge; top ring mass loss; valve train;


ICS Code

ICS Number Code 27.020 (Internal combustion engines); 75.100 (Lubricants, industrial oils and related products)


DOI: 10.1520/D7468-13

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