SH/T 0782-2005 Diesel engine oil performance evaluation method (Caterpillar 1K/1N method)

AI-translated method card — human verification pending. This is not an official translation of the standard. Unclear source values remain unverified; check the original standard and product certificate before use.

Card type: Test method

1. Method number / full name / English name / supersession relationship

• Standard number: SH/T 0782-2005
• Chinese name: Diesel engine oil performance evaluation method (Caterpillar 1K/1N method)
• English name: Test procedure for evaluating the performance of internal combustion engine oils (Caterpillar 1K/1N procedure)
• Supersession relationship: not provided in the available source (the foreword only states modified adoption of ASTM D6750-02, and does not mention superseding an old standard number)
• Adoption relationship: modified adoption of ASTM D6750-02 "Internal combustion engine oil high-speed single-cylinder diesel engine evaluation method — 1K method [fuel sulfur content 0.4% (mass fraction)] and 1N method [fuel sulfur content 0.04% (mass fraction)]"
• Publication/implementation: published on 2005-11-28, implemented on 2006-06-01
• Issuing authority: National Development and Reform Commission of the People's Republic of China
• Technical committee: Sinopec Research Institute of Petroleum Processing
• Drafting organization: Sinopec Research Institute of Petroleum Processing
• Main drafters: Wei Litian, Li Shaoyu, Liu Shuntao, Wang Qingxin, Lu Wentong, Yang Benfeng, Zhao Yancheng

2. Scope of application and non-applicability

• 1.1 This standard specifies a method for evaluating the performance of diesel engine oils using a high-speed, single-cylinder diesel engine. The performance of diesel engine oils is evaluated by determining the tendency to form deposits on pistons and piston ring grooves, and oil consumption, etc.
• 1.2 This standard includes the 1K method [fuel sulfur content 0.4% (mass fraction)] and the 1N method [fuel sulfur content 0.04% (mass fraction)]; the only difference between the two test methods is the use of different fuels.
• 1.3 The 1K method is suitable for evaluating CF-4 grade and CH-4 grade diesel engine oils, etc.; the 1N method is suitable for evaluating CG-4 grade diesel engine oils, etc.
• 1.4 This standard uses International System of Units [SI] units.
• 1.5 This standard involves certain hazardous materials, operations, and equipment, but does not address all safety issues associated with them; therefore, users should establish appropriate safety systems and protective measures before using this standard.
• Non-applicability scope: not explicitly listed in the available source.

3. Method principle

• The test engine is a 1Y540 engine produced by Caterpillar (Caterpillar) or a modified 1Y73 engine.
• Before each test, the power-producing parts of the engine are disassembled strictly according to the method and cleaned with solvent naphtha, and new pistons, piston ring assemblies, and cylinder liners are measured and installed.
• The test system should be equipped with auxiliary equipment for controlling speed, load, and various test conditions. The engine intake supercharging system should be equipped with air filtration, humidity adjustment, supercharging, and heating, etc.
• Using the test oil as engine lubricating oil, it is added to a calibrated single-cylinder diesel engine and operated continuously for 252h under specified test conditions.
• Before each test and each time the engine is started, a special run-in procedure must be used.
• During the test, engine oil consumption must be measured periodically.
• After the test, the engine is disassembled, the nature and amount of piston deposits are evaluated, the sticking condition of the piston rings is checked, the wear amount of the piston rings and cylinder liner is measured and calculated, and the average consumption of the test oil is calculated.
• The 1K test uses fuel with a sulfur content of 0.4% (mass fraction). The 1N test uses fuel with a sulfur content of 0.04% (mass fraction).

4. Reagents and materials (purity / preparation)

• 7.1 Fuel engine coolant: use antifreeze containing 50% (volume fraction) softened water. Engine coolant can be used continuously for six tests.
  • 7.1.1 Antifreeze: ethylene glycol type engine coolant concentrate for light-duty engines (SH/T 0521—1999).
• 7.2 Test fuel:
  • 7.2.1 1K method test fuel: fuel with sulfur content 0.4%. Technical specifications are given in Table A.1 in Appendix A.
  • 7.2.2 1N method test fuel: fuel with sulfur content 0.04%. Technical specifications are given in Table A.2 in Appendix A.
• 7.3 Test oil: approximately 58L of test oil is required for each test.
  • 7.3.1 The test oil sample should be representative of the test oil formulation and uncontaminated.
• 7.4 Engine cleaning solvent: meets the requirements of No. 190 in GB 1922.
• 7.5 Engine dispersant cleaner: calcium petroleum sulfonate (industrial grade).
• 7.6 Sodium bisulfate (NaHSO₄): industrial grade.
• 7.7 Trisodium phosphate (Na₃PO₄): industrial grade.
• 7.8 Lead shot: diameter approximately 5mm (or equivalent lead wire).
• 7.9 Diesel engine piston evaluation equipment:
  • 7.9.1 Diesel engine piston rating box: a double spherical fluorescent lamp, 20W cool white. Made of plywood, dimensions 1200mm × 75mm × 648mm.
  • The remaining 7.9.x items are not provided in the available source (source-text extraction missing).

5. Instruments and equipment

• 6.1 Laboratory environment:
  • 6.1.1 Engine operation and installation area — keep the surrounding air clean, free of dust and other impurities.
  • 6.1.2 Component measurement area — it is recommended to maintain the temperature of the measurement area at 10℃~25℃; if the air temperature is not within this range, maintain the temperature difference within ±3℃. Maintain the relative humidity of the measurement area at 45%~65%.
  • 6.1.3 Parts rating area — meets the requirements of the diesel engine oil rating method.
  • 6.1.4 Parts cleaning area — no specific requirements. The cleaning area must have ventilation equipment and safety protection devices.
• 6.2 Test engine: a 1Y540 or modified 1Y73 single-cylinder four-valve direct-injection diesel engine produced by Caterpillar. Bore 137.2mm, stroke 165.1mm, displacement 2.4L, compression ratio 14.5:1.
• 6.3 Auxiliary systems and auxiliary equipment of the test engine:
  • 6.3.1 Intake system — consists of an air supercharging device, an intake heating tank with an electric heating element, soundproof hoses, and appropriate piping, etc. Intake tank volume 193L–221L, inner diameter 483mm–584mm; the intake pipe from the intake tank flange to before the engine intake elbow must not be bent and its length must be within the range of 533.4mm±12.7mm.
  • 6.3.2 Exhaust system — consists of an elbow, bellows, exhaust tank, etc. A back pressure valve is installed on the exhaust pipe after the exhaust tank. A temperature sampler is also installed.
  • 6.3.3 Cooling system — a closed-loop circulation system consisting of an engine-driven centrifugal water pump, piping, coolant tank, bypass valve, and heat exchanger, etc.
    • 6.3.3.1 Control and measurement of coolant flow — measure coolant flow with a flow meter, control the coolant flow within the range of 65L/min±2.0L/min through the bypass valve at the pump outlet, control the temperature difference between the engine coolant inlet and outlet within the range of 5.0℃±1.0℃, and control the cylinder head coolant outlet temperature within the range of 93℃±2.5℃.
    • 6.3.3.2 Cooling system cleaning requirements — when grease, scale, or rust is visually observed in the cooling system, the cooling system should be cleaned. First clean grease, then clean scale and rust.
    • 6.3.3.3 Steps for cleaning grease in the cooling system (the source lists three steps: a, b, c).
    • 6.3.3.4 Steps for cleaning scale or rust in the cooling system (the source lists steps a~f, with part of source-text extraction missing).
  • 6.3.4 Engine starting system — when the engine speed reaches 200r/min, the torque is maintained at 102N·m; at 136N·m, the starter automatically disengages from the engine starting gear.
  • 6.3.5 Fuel system — consists of a fuel pump, fuel consumption measurement system, overflow valve, float tank, fuel heat exchanger, fuel injection pump, pressure-resistant lines, etc.
    • 6.3.5.1 Fuel consumption measurement system — ensures fuel consumption is within the range required by the test.
    • 6.3.5.2 Overflow line — serves to stabilize fuel temperature and eliminate bubbles in the system. Install a throttle valve or similar device on the line to prevent fuel from flowing back during shutdown.
    • 6.3.5.3 Install a solenoid valve at the fuel pump inlet to control fuel flow.
  • 6.3.6 Engine lubrication system — consists of an oil pump, oil weighing system, oil filter, oil cooler, etc.
    • Oil pump — for ease of automatic control, the oil pump is modified by adding a bypass valve.
    • Oil weighing system — weighing range 5kg (approximately 6L of oil), weighing deviation 4.5g. The weighing system is connected to the engine by a hose, and the total length of the hose is less than 2.7m.
  • 6.3.7 Blow-by measuring instrument — a liquid flow meter with a blow-by separator and pressure regulating valve.
  • 6.3.8 Dynamometer — use a dynamometer or an appropriate load-measuring device to control engine load and speed.
  • 6.3.9 Other auxiliary engine equipment — specific installation positions of various thermocouples and pressure sensors.
    • 6.3.9.1 Thermocouples: intake thermocouple, exhaust thermocouple, coolant thermocouple, oil thermocouple, fuel thermocouple.
    • 6.3.9.2 Pressure sensors: intake pressure is measured at the top of the intake surge tank; exhaust back pressure is measured at the top of the exhaust surge tank; oil pressure is measured at the oil distributor outlet; fuel pressure is measured at the filter cover plate; crankcase vacuum is measured at the crankcase side cover plate; piston cooling nozzle pressure is measured at the housing.
    • 6.3.9.3 Flow meters and measurement positions: coolant flow is measured at the orifice plate; fuel flow is measured at the fuel consumption meter; intake humidity is measured at 76mm from the intake surge tank.
  • 6.3.10 Calibration of measuring devices — before the test bench begins calibration tests, all equipment used for reading test data should be calibrated in a timely manner.
  • 6.3.11 Calibration of standard measuring devices — all standard measuring devices for temperature, pressure, and speed themselves must be calibrated annually, traceable to national standards. Keep these calibration records for at least [specific number of years not provided in the available source].

6. Recommended operating conditions

• Test operating conditions are given in Table B.1 in Appendix B (engine run-in, warm-up, cool-down, and test conditions).
• Main parameters of Table B.1 (stable test conditions at step 5):
  • Speed: 2100r/min±10r/min
  • Power: 52kW
  • Brake mean effective pressure (BMEP): 1240kPa
  • Fuel rate: 8430kJ/min±53kJ/min
  • Fuel flow: 185kg/h±1kg/h (source-text extraction doubtful point, requires confirmation against the source standard)
  • BSFC: 0.213kg/kW·h
  • Intake air humidity: 17.8g/kg±1.7g/kg
  • Coolant outlet temperature: 93℃±2.5℃
  • Coolant inlet temperature: 88℃
  • Coolant temperature difference: 5℃±1℃
  • Main oil gallery temperature: 107℃±2.5℃
  • Oil cooler inlet temperature: 110℃
  • Intake air temperature: 127℃±2.5℃
  • Exhaust temperature: 550℃±30℃
  • Fuel temperature: 57℃±3℃
  • Main oil gallery pressure: maximum 482kPa
  • Piston cooling nozzle pressure: 360kPa±13kPa
  • Fuel pressure in filter chamber: 210kPa±20kPa
  • Coolant pressure: 50kPa
  • Intake air pressure (absolute): 240kPa±1kPa
  • Exhaust back pressure (absolute): 216kPa±1kPa
  • Crankcase vacuum: 0.7kPa±0.1kPa
  • Crankcase blow-by: maximum 23L/min
  • Coolant flow rate: 65L/min±2L/min
  • Air-fuel ratio: 29
• Operating conditions, measurement resolution, and rounding digits are given in Table B.2 in Appendix B.
• The allowable limits for the out-of-range rate and the mid-range deviation rate of test parameters are given in Table B.3 in Appendix B.
• The heating program is given in Table B.4 in Appendix B.

7. Sampling and specimen preparation

• 10.6 Test oil sampling:
  • 10.6.1 Sample according to the requirements specified in Table J.1 in Appendix J. The quantity for each sampling is 237mL.
  • 10.6.2 After sampling, top up with new test oil to the oil full mark.
• 11.3 Test oil inspection—inspect and analyze the new test oil sample and the oil samples taken during the test (Table J.5).
  • 11.3.1 Pre-test oil sample—use the test oil before the test to perform the following tests:
    • 11.3.1.1 Use GB/T 265 to analyze the kinematic viscosity of 100℃.
    • 11.3.1.2 Use SH/T 0251 to analyze the base number.
    • 11.3.1.3 For reference oil tests, use GB/T 17476 to measure the content of wear metal elements Fe, Al, Cu, Cr, Pb, or elements such as Si introduced by inflow or air.
  • 11.3.2 Oil samples taken during the test—use the oil samples taken with 24h, 204h, 252h to perform the following tests:
    • 11.3.2.1 Perform the same tests as for the pre-test oil sample (see 11.3.1).
    • 11.3.2.2 Analyze the degree of fuel dilution of the oil sample.

8. Analysis procedure

• 8 Equipment preparation:
  • 8.1 Engine inspection:
    • 8.1.1 Before the calibration test of the test bench, the engine must be fully inspected according to the requirements of the 1Y540 service manual. A newly repaired engine must be run for 24h. Ensure that the deviation of the camshaft in opening and closing the valves is within 4° (crankshaft angle). If the engine crankshaft is replaced for any reason, the bench must undergo a calibration test.
    • 8.1.2 Engine measuring devices—regularly inspect and calibrate the measuring devices in the engine oil system and cooling system.
    • 8.1.3 Piston cooling nozzle—measure the inner diameter of the piston cooling nozzle and replace piston cooling nozzles that do not meet the requirements. The outlet inner diameter of the engine piston cooling nozzle is D3.429mm±0.127mm. Use probes of different types to check the inner diameter of the cooling nozzle: the No.29 probe (D3.4544mm) is the normal size; the No.28 probe (D3.5687mm) cannot be inserted into the cooling nozzle; the No.33mm probe (D3.2995mm) can be inserted into the cooling nozzle.
  • 8.2 Cleaning of the engine lubrication system before the test:
    • 8.2.1 Solvent cleaning—before each test, use a dedicated cleaning cart, add cleaning agent to flush and clean the lubrication system. For cleaning steps, see 8.2.1.1~8.2.1.12.
    • 8.2.2 Test oil flushing—after the solvent cleaning procedure is completed, flush twice with test oil. For flushing steps, see 8.2.2.1~8.2.2.5.
  • 8.3 Pre-test measurements and inspections:
    • 8.3.1 Crankshaft angle—before the test, check the crankshaft angle when the exhaust and intake cams are at the specified lift positions.
    • 8.3.2 Technical requirements for cylinder head and valves—each test requires a new or repaired cylinder head. Measure and record the repaired cylinder head. For specific requirements, see 8.3.2.1~8.3.2.13.
    • 8.3.3 Piston and piston ring assembly—each test uses a new piston and piston ring assembly. Before installation, clean, measure, and record the piston and piston rings. For technical requirements, see Table 1.
    • 8.3.4 Cylinder liner measurement—each test uses a new cylinder liner. The measured inner diameter of the new cylinder liner should be D137.185mm±0.025mm; maximum out-of-roundness 0.038mm; maximum cylindricity 0.051mm; the flange thickness of the cylinder liner is 8.89mm±0.02mm. Measure the vertical and parallel (relative to the crankshaft direction) inner diameters of the cylinder liner at five positions 15mm, 25mm, 50mm, 130mm, 230mm from the upper surface of the cylinder liner.
    • 8.3.5 Compression ratio measurement—before each test, measure the clearance between the piston and cylinder head at top dead center (TDC) of the piston stroke to ensure the engine compression ratio is 14.5:1. Use lead pellets with a diameter of about 5mm to measure the compression ratio. The average thickness of the lead pellets should be 3.556mm±0.076mm.
    • 8.3.6 Check injection advance angle—before each test, adjust the piston stroke to 31.5°±0.5° before top dead center of the compression stroke, and check the engine injection advance angle using the bubble method or an electronic fuel timing measurement device. For the bubble method steps, see 8.3.6.1~8.3.6.9.
    • 8.3.7 Pre-test parts inspection—before conducting the reference oil test, inspect all parts and components removed when disassembling the engine. Replace parts that do not meet the requirements.
  • 8.4 Engine installation:
    • 8.4.1 Installation requirements—install engine components according to the service manual part and bolt torque requirements.
    • 8.4.2 Torque requirements for engine installation—install the engine according to the specified torque. For specific torque requirements, see 8.4.2.1 and subsequent items (source-text extraction partially missing).
    • 8.4.3 Adjust valve clearance—turn the engine to top dead center of the compression stroke, measure and adjust the valve clearance (intake valve 0.38mm±0.08mm, exhaust valve 0.76mm±0.08mm).
• 9 Calibration of the engine test bench:
  • 9.1 General calibration requirements and calibration interval—after the test bench has conducted 15 tests (1K test or 1N test), calibration with reference oil is required. One test bench can be used for calibration of both the 1K method and the 1N method. When a calibration test fails, the calibration for the other method may still be valid.
  • 9.2 Reference oil for calibration—select an appropriate reference oil as the test oil for the test (1K reference oil test or 1N reference oil test). The acceptance criteria for the calibration test are shown in Table D.1 to Table D.4 in Appendix D.
• 10 Engine operating procedure:
  • 10.1 Engine break-in: 10.1.1~10.1.5 (add new test oil to the crankcase; install a new oil filter; add coolant to the cooling system; purge air bubbles from the fuel system; start the engine and perform the 60min break-in according to the operating conditions in Table B.1 in Appendix B and the heating program in Table B.4).
  • 10.2 Cooling procedure—except for emergency shutdown and uncontrolled shutdown, after the 60min break-in is completed, cool down in the order of steps 3→2→1 in Table B.4 in Appendix B, and shut down after 20min.
  • 10.3 Heating program—same as the break-in heating program (see Table B.4 in Appendix B).
  • 10.4 Operating conditions and oil top-up: 10.4.1~10.4.6.8 (including test conditions, oil top-up, oil weighing, test time 252h, calculation of out-of-range rate and mid-range deviation rate, etc.).
  • 10.5 Measurement of oil consumption: 10.5.1~10.5.4 (use linear regression to calculate oil consumption, calculate BSOC, EOTOC, etc.).
  • 10.6 Test oil sampling: see Section 7.
  • 10.7 Shutdown, shutdown time, and deviation tolerance—report shutdowns during the test in Table I.9 in Appendix I. The maximum allowed shutdown time during the test is 125h. If an emergency shutdown occurs, it must be shut down for more than 2h.
  • 10.8 Measurement of air-fuel ratio—within the first 24h and the last 24h of the test, use a suitable measuring device to measure and calculate the engine air-fuel ratio (see Table J.2 in Appendix J). The exhaust composition-air-fuel ratio comparison table is in Appendix C.
  • 10.9 Humidity measurement—use a suitable device to control the engine intake air humidity within the specified range. Record the intake air humidity every hour.
• 11 Inspection, photography, and measurement of engine parts:
  • 11.1 Measurement of engine parts before the test—see part of Clause 8.3.
  • 11.2 Post-test evaluation—evaluate deposits and measure wear at the end of the engine test. The evaluation methods for pistons and cylinder liners are based on manuals SH/T 0031 and CRC 18.
    • 11.2.1 Deposit evaluation, photography, and measurement—refer to SH/T 0031 to inspect and evaluate the piston and piston ring assembly. Carbon deposit coefficient ratings range from 1.000 to 0.250; varnish deposit coefficient ratings range from 9.0 to 0.0.
    • 11.2.2 Side clearance of piston and piston rings—perform according to Figure 32 and Table G.2 in Appendix G.
    • 11.2.3 Piston ring end gap—measure the piston ring end gap according to Figure 32.
    • 11.2.4 Measurement and photography of cylinder liner wear and cylinder liner polishing—according to the diesel engine cylinder liner scoring method, remove the cylinder liner, clean and measure it.
  • 11.3 Test oil inspection—see Section 7.
  • 11.4 Oil consumption—calculate and record the average oil consumption for each 12h period, 0–24h period, and 0–252h period (Table I.6).
  • 11.5 Unscheduled shutdowns and out-of-limit operations—During the 252h test, if engine shutdowns or operating conditions exceed the test requirement limits, report the test hours, test time, and test date when these conditions occurred (see Table I.9 in Appendix I). If no control parameter data are obtained for more than 4 consecutive hours, the test operation is considered invalid.

9. Qualitative and Quantitative and Calculation Formulas

• 10.4.6 Calculation of the out-of-limit rate and the test parameter mid-deviation rate:
  • Formula for calculating the test parameter out-of-limit rate: Test parameter out-of-limit rate = (out-of-limit time duration / total time) × 100 Where: when the recorded value of a parameter exceeds the specified upper limit, the upper limit value is used, or when it exceeds the lower limit, the lower limit value is used; the denominator is the total time (according to the recording frequency).
  • Formula for calculating the test parameter mid-deviation rate: Test parameter mid-deviation rate = (|X - required value| / required range) × 100 Where: X—— the average of all recorded values of all measured parameters (accurate to 0.1); required value—the required value of the test measured parameter; required range—the upper limit value of the measured parameter minus the lower limit value, or twice the tolerance.
  • Allowable limits for the test parameter out-of-limit rate and the test parameter mid-deviation rate: for any operating parameter listed in the corresponding numerical value 1/3 column in this table, the test operation is invalid.
• 10.5 Measurement of oil consumption:
  • Use linear regression to calculate oil consumption (see Appendix E).
  • Using oil weighing readings, take the oil weighing reading at that time within each 12h period as a function of time, and plot graphically. Exclude the first oil weighing reading after refueling from the linear regression method.
  • Derive 12h oil consumption data points from the graph. From the data for each 12h period listed in the linear regression method, including shutdowns, calculate BSOC (do not include the first oil mass reading after shutdown in the linear regression line): (1) calculate the linear regression for the time period before the shutdown and the time period after the shutdown; (2) average the two linear regressions to obtain the oil consumption within this 12h time period. Calculate the oil consumption rate (BSOC) based on the actual average engine power over the 12h time period.
  • Calculate the average value of the oil consumption rate, and also calculate and report the average value of the oil consumption rate between 0–24h and between 0–252h. Calculate the oil consumption rate after the end of the test (EOTOC) from the last two 12h average values (BSOC) on the chart. For a normal complete test, the EOTOC value is the same as the BSOC value of 252h.
• 11.4 Oil consumption—calculate and record the average oil consumption for each 12h period, 0–24h period, and 0–252h period (Table I.6).
  • 11.4.1 For a 12h period that includes one shutdown, calculate BSOC as follows:
    • 11.4.1.1 In the linear regression method after the shutdown, do not include the first oil mass reading.
    • 11.4.1.2 Calculate the linear regression for the period before the shutdown.
    • 11.4.1.3 Calculate the linear regression for the period after the shutdown.
    • 11.4.1.4 Average the two linear regressions to obtain the oil consumption for this 12h period.
  • 11.4.2 Use the actual engine output power to calculate the specific oil consumption (BSOC) for this 12h period.
  • 11.4.3 Calculate the average oil consumption between 0 and 24h and between 0 and 252h.

10. Precision

• 13 Precision: determine the reliability of judging test results (95% confidence level).
• 13.1 Repeatability (r): the difference between two test results obtained by the same operator using the same instrument on the same sample in continuous determination shall not exceed the value in Table 2 or Table 3.
• 13.2 Reproducibility (R): the difference between results obtained by different operators using different instruments shall not exceed the value in Table 2 or Table 3.
• Table 2 1K Reference oil precision data (partial source-text extraction data, requires confirmation against the source standard):
  • Piston deposit weighting: repeatability r = 68.73, reproducibility R = 86.24
  • First ring groove carbon filling rate, %: r = 12.4, R = 46.2
  • First ring land heavy carbon rate converted value, ln(TLHC+1): r = 0.932, R = 2.369
  • Average oil consumption, g/kW·h: r = 0.089, R = 0.238
• Table 3 1N Reference oil precision data (partial source-text extraction data, requires confirmation against the source standard):
  • Piston deposit weighting: r = 89.56, R = 86.24
  • First ring groove carbon filling rate: r = 46.2, R = 46.2
  • First ring land heavy carbon rate conversion: r = 0.838, R = 2.369
  • Average oil consumption, g/kW·h: r = 0.084, R = 0.238
• Note: These statistical data are based on results obtained from TMC reference oil [number requires confirmation against the source standard (source-text extraction)].
• Note: S_r—— repeatability standard deviation; r—— repeatability; S_R—— reproducibility standard deviation; R—— reproducibility.

11. Report

• 12 Report:
  • 12.1 General description: For the report form used in the final report of Method 1K/1N, see Appendix I.
  • 12.2 Technical description:
    • 12.2.1 All test results are recorded in Table I.1 of Appendix I.
    • 12.2.2 A summary of the average operating condition data for the engine's final [specific number of hours not provided in the available source] is given in Table I.2 in Appendix I.
    • 12.2.3 Calculate the average oil consumption rate for each 12h. Report the oil consumption rate of the test in Table I.6 in Appendix I. For a normally completed test, the BSOC value of the last two 12h and the BSOC value of 0~252h are the same.
    • 12.2.4 Report the piston ring and cylinder liner wear measurement values in Table I.7 and Table I.8 in Appendix I, respectively.
    • 12.2.5 Report abnormal conditions in Table I.9 in Appendix I. If a test does not obtain test operation data for more than 4 consecutive hours, the operation is considered invalid.
    • 12.2.6 Include photographs of both sides of the piston and cylinder liner (pressure-bearing side and non-pressure-bearing side) (see Appendix I).

12. Reference Documents

• GB/T 260 Determination of water content in petroleum products
• GB/T 261 Determination of flash point of petroleum products (closed cup method) (GB/T 261-83 (91), REF ISO 2719:1973)
• GB/T 265 Determination of kinematic viscosity of petroleum products and calculation of dynamic viscosity
• GB/T 268 Determination of carbon residue of petroleum products (Conradson method) (GB/T 268-87, EQV ISO 6615:1983)
• GB/T 380 Determination of sulfur content in petroleum products (lamp method)
• GB/T 386 Determination of ignition quality of diesel fuel (cetane number method)
• GB/T 508 Determination of ash content in petroleum products (GB/T 508-85 (91), REF ISO 6245:1982)
• GB/T 511 Determination of mechanical impurities in petroleum products and additives (gravimetric method)
• GB/T 1884 Laboratory determination of density of crude oil and liquid petroleum products (hydrometer method) (GB/T 1884-2000, EQV ISO 3675:1998)
• GB/T 1885 Petroleum measurement tables (GB/T 1885-1998, EQV ISO 91-2:1998)
• GB 1922 Solvent naphtha
• GB/T 3535 Determination of pour point of petroleum (GB/T 3535-83 (91), EQV ISO 3016:1974)
• GB/T 5096 Copper strip corrosion test method for petroleum products
• GB/T 6531 Determination of sediment in crude oil and fuel oil (extraction method) (GB/T 6531-86 (91), EQV ISO 3735:1975)
• GB/T 6536 Determination of distillation of petroleum products
• GB/T 6986 Determination of cloud point of petroleum (GB/T 6986-86 (91), EQV ISO 3015:1974)
• GB/T 7304 Determination of acid number of petroleum products and lubricants (potentiometric titration method)
• GB/T 11132 Determination of hydrocarbon types in liquid petroleum products (fluorescent indicator adsorption method)
• GB/T 11139 Calculation of cetane index of distillate fuels
• GB/T 11140 Determination of sulfur content in petroleum products (X ray spectrometry)
• GB/T 17040 Determination of sulfur content in petroleum products (energy-dispersive X ray fluorescence spectrometry)
• GB/T 17144 Determination of carbon residue of petroleum products (micro method)
• GB/T 17476 Determination of additive elements, wear metals, and contaminants in used lubricating oils and certain elements in base oils (inductively coupled plasma emission spectrometry)
• SH/T 0031 Rating method for piston cleanliness of diesel engines
• SH/T 0251 Determination of base number of petroleum products (perchloric acid potentiometric titration method)
• SH/T 0521 Ethylene glycol-based engine coolant for automobiles and light-duty engines (SH/T 0521-1999)
• SH/T 0606 Determination of hydrocarbon composition of middle distillates (mass spectrometry method)
• SH/T 0694 Calculation of cetane index (four-variable formula method)
• CRC MANUAL CRC 18 manual
• ASTM D6750-02 (modified adoption of the source standard)

13. Source and verification

This page is an AI translation of the available Chinese method card. Human verification is pending. It is not an official translation of the standard. Check the source standard and product certificate before use.

14. Quick Reference Q&A