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.
Область применения1.1 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.
Section
Scope
Referenced Documents
Terminology
Summary of Test Method
Significance and Use
Apparatus
Test Engine Configuration
Test Engine
Oil Heat Exchanger, Adapter Blocks, Block Off Plate
Oil Filter Head Modification
Oil Pan Modification
Engine Control Module (ECM)
Engine Position Sensor
Intake Manifold Temperature Sensor
Barometric Pressure Sensor
Turbocharger Controller
Power Supply Voltage
Air Compressor and Fuel Pump
Engine Block Preparation
Test Stand Configuration
Engine Mounting
Intake Air System
Aftercooler
Exhaust System
Exhaust Gas Recirculation System
Fuel System
Coolant System
Pressurized Oil Fill System
External Oil System
Crankcase Aspiration
Blowby Rate
System Time Responses
Oil Sample Containers
Mass Balance
Engine and Cleaning Fluids
Test Oil
Test Fuel
Engine Coolant
Pentane
Solvent
Preparation of Apparatus
Cleaning of Parts
General
Engine Block
Cylinder Head
Rocker Cover and Oil Pan
External Oil System
Crosshead Cleaning and Measurement
Rod Bearing Cleaning and Measurement
Ring Cleaning and Measurement
Injector Adjusting Screw Cleaning and Measurement
Engine Assembly
General
Parts Reuse and Replacement
Build-Up Oil
Coolant Thermostat
Oil Thermostat
Fuel Injectors
New Parts
Operational Measurements
Units and Formats
Instrumentation Calibration
Temperatures
Pressures
Flow Rates
Intake and Exhaust CO2 Measurement
Engine/Stand Calibration and Non-Reference Oil Tests
General
New Test Stand
New Test Stand Calibration
Stand Calibration Period
Stand Modification and Calibration Status
Test Numbering System
General
Reference Oil Tests
Non-Reference Oil Tests
Reference Oil Test Acceptance
Reference Oil Accountability
Last Start Date
Donated Reference Oil Test Programs
Adjustments to Reference Oil Calibration Periods
Procedural Deviations
Parts and Fuel Shortages
Reference Oil Test Data Flow
Special Use of the Reference Oil Calibration System
Test Procedure
Engine Installation and Stand Connections
Coolant System Fill
Oil Fill for Break-in
Engine Build Committed
Fuel Samples
Engine Warm-up
Shutdown During Warm-up
Engine Break-in
Shutdown and Maintenance
Normal Shutdown
Emergency Shutdown
Maintenance
Downtime
200-h Test Procedure
Oil Fill for Test
Operating Conditions
Injection Timing Change
Mass % Soot Validity
Test Timer
Operational Data Acquisition
Oil Sampling
Oil Addition
End of Test (EOT)
Engine Disassembly
Calculations, Ratings and Test Validity
Crosshead Mass Loss
Crosshead Mass Loss Correction Factor
Injector Adjusting Screw Mass Loss
Injector Adjusting Screw Correction Factor
Ring Mass Loss
Sludge Ratings
Oil Filter Plugging
Oil Analyses
Oil Consumption
Fuel Analyses
Additional Analysis
Assessment of Operational Validity
Assessment of Test Interpretability
Test Report
Report Forms
Reference Oil Test
Electronic transmission of Test Results
Precision and Bias
Precision
Intermediate Precision Conditions
Reproducibility Conditions
Bias
Keywords
Annexes
Safety Precautions
Intake Air Aftercooler
Engine Build Parts Kit
Sensor Locations, Special Hardware, and Engine Block Modifications
External Oil System
Fuel Specification
Cummins Service Publications
Specified Units and Formats
Report Forms and Data Dictionary
Sludge Rating Worksheets
Oil Analyses
Determination of Operational Validity
Exhaust CO2 Sampling Probe
ISM Merit Rating Calculation
Appendix
Typical System Configurations