【国外标准】 Standard Test Method for John Deere Coolant Cavitation Test

5.1 This test method was developed to evaluate the ability of a heavy-duty diesel engine coolant to provide protection against damage resulting from a phenomenon known as cylinder liner cavitation corrosion.5.2 This test method may be used for engine coolant specification acceptance when all details of this test method are in compliance.5.3 The design of the engine used in this test method is a production OEM diesel engine modified to consistently produce the operating conditions that accelerate damage from cylinder liner cavitation. This factor, along with the accelerated operating conditions needs to be considered when extrapolating test results.1.1 This test method is commonly referred to as the John Deere Cavitation Test.2 The test method defines a heavy-duty diesel engine to evaluate coolant protection as related to cylinder liner pitting caused by cavitation.1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. The only exception is where there is no direct SI equivalent such as screw threads, national pipe threads/diameters, and tubing sizes.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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. See Annex A1 for general safety precautions.1.4 Table of Contents:  1Referenced Documents 2Terminology 3Summary of Test Method 4 5Apparatus 6Test Engine Configuration 6.1Test Engine 6.1.1Test Stand Configuration 6.2Engine Mounting 6.2.1Intake Air System 6.2.2Aftercooler 6.2.3Exhaust System 6.2.4Fuel System 6.2.5Coolant System 6.2.6Oil System 6.2.7Oil Volume 6.2.7.1Pressurized Oil Fill System 6.2.7.2External Oil System 6.2.7.3Oil Sample Valve Location 6.2.7.4Unacceptable Oil System Materials 6.2.7.5Crankcase Aspiration 6.3Blowby Rate 6.4System Time Responses 6.5Clearance Measurements 6.6Engine and Cleaning Fluids 7Engine Oil 7.1Test Fuel 7.2Test Coolant 7.3Solvent 7.4Preparation of Apparatus 8Cleaning of Parts 8.1General 8.1.1Engine Block 8.1.2Cylinder Head 8.1.3Rocker Cover and Oil Pan 8.1.4External Oil System 8.1.5Rod Bearing Cleaning and Measurement 8.1.6Ring Cleaning and Measurement 8.1.7Injector Nozzle 8.1.8Pistons 8.1.9Engine Assembly 8.2General 8.2.1Parts Reuse and Replacement 8.2.2Build-Up Oil 8.2.3Coolant Thermostat 8.2.4Fuel Injectors 8.2.5New Parts 8.2.6Operational Measurements 8.3Units and Formats 8.3.1Instrumentation Calibration 8.3.2Fuel Consumption Rate Measurement Calibration 8.3.2.1Temperature Measurement Calibration 8.3.2.2Pressure Measurement Calibration 8.3.2.3Temperatures 8.3.3Measurement Location 8.3.3.1Coolant Out Temperature 8.3.3.2Coolant In Temperature 8.3.3.3Fuel In Temperature 8.3.3.4Oil Gallery Temperature 8.3.3.5Intake Air Temperature 8.3.3.6Intake Air after Compressor Temperature 8.3.3.7Intake Manifold Temperature 8.3.3.8Exhaust Temperature 8.3.3.9Exhaust after Turbo Temperature 8.3.3.10Additional Temperatures 8.3.3.11Pressures 8.3.4Measurement Location and Equipment 8.3.4.1Condensation Trap 8.3.4.2Coolant Pressure 8.3.4.3Fuel Pressure 8.3.4.4Oil Gallery Pressure 8.3.4.5Intake Air Pressure 8.3.4.6Intake Air after Compressor Pressure 8.3.4.7Intake Manifold Pressure 8.3.4.8Exhaust after Turbo Pressure 8.3.4.9Crankcase Pressure 8.3.4.10Additional Pressures 8.3.4.11Flow Rates 8.3.5Flow Rate Location and Measurement Equipment 8.3.5.1Blowby 8.3.5.2Fuel Flow 8.3.5.3Engine/Stand Calibration and Non-Reference Coolant   Tests 9General 9.1New Test Stand 9.2New Test Stand Calibration 9.2.1Stand Calibration Period 9.3Stand Modification and Calibration Status 9.4Test Numbering System 9.5General 9.5.1Reference Coolant Tests 9.5.2Non-Reference Coolant Tests 9.5.3Reference Coolant Test Acceptance 9.6Reference Coolant Accountability 9.7Last Start Date 9.8Donated Reference Coolant Test Programs 9.9Adjustments to Reference Coolant Calibration Periods 9.10Procedure Development 9.10.1Parts and Fuel Shortages 9.10.2Reference Coolant Test Data Flow 9.10.3Special Use of The Reference Coolant Calibration System 9.10.4Procedure 10Engine Installation and Stand Connections 10.1Break-in 10.2Coolant System Fill for Break-in 10.2.1Oil Fill for Break-in 10.2.2Engine Build Committed 10.2.3Break-in Conditions 10.2.4Shutdown during Break-in 10.2.5250-Hour Test Procedure 10.3Coolant System Fill for Test 10.3.1Zero-Hour Coolant Sample 10.3.1.1Oil Fill for Test 10.3.2Zero-Hour Oil Sample 10.3.2.1Warm-Up 10.3.3Warm-up Conditions 10.3.3.1Shutdown during Warm-up 10.3.3.220-Hour Steady State Extended Break-in 10.3.420-Hour Steady State Extended Break-in Conditions 10.3.4.1Shutdown during 20-Hour Extended Break-in 10.3.4.2230-Hour Cyclic 10.4230-Hour Cyclic Conditions 10.4.1Shutdown during 230-Hour Cyclic 10.4.2Shutdown and Maintenance 10.5Normal Shutdown 10.5.1Emergency Shutdown 10.5.2Maintenance 10.5.3Downtime 10.5.4Operating conditions 10.6Stage Transition Times 10.6.1Test Timer 10.6.2Operational Data Acquisition 10.6.3Operational Data Reporting 10.6.4Coolant Sampling 10.6.5Oil Sampling 10.6.6End of Test (EOT) 10.7Shutdown 10.7.1Oil Drain 10.7.2Coolant Drain 10.7.3Engine Disassembly 10.7.4Calculations, Ratings and Test Validity 11Liner Pit Count 11.1Coolant Analysis 11.2Oil Analyses 11.3Assessment of Operational Validity 11.4Report 12Report Forms 12.1Reference Coolant Test 12.2Electronic Transmission of Test Results 12.3Precision and Bias 13Precision 13.1Intermediate Precision Conditions 13.1.1Intermediate Precision Limit 13.1.2Reproducibility Conditions 13.2Reproducibility Limit 13.2.1Bias 13.3Keywords 14Annexes  Safety Precautions Annex A1Intake Air Aftercooler Annex A2Engine Build Parts Kit Annex A3Sensor Locations, Special Hardware, and Engine Block   Modifications Annex A4Fuel Specifications Annex A5John Deere Service Publications Annex A6Specified Units and Formats Annex A7Report Forms and Data Dictionary Annex A8Coolant Analysis Annex A9Oil Analysis Annex A10Determination of Operational Validity Annex A11Typical System Configurations Appendix X11.5 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.