Lab instruments Gasoline octane number Tester by Spark-Ignition method ASTM D2700
Available standards:
Gasoline octane number measuring machine for the determination of antiknock performance of automobile and spark
ignition type aeroengine gasoline.
GB/T503 Gasoline octane number measuring machine (Motor method), ASTM D2700 Gasoline octane number
measuring machine (Motor method)
GB/T5487 Gasoline Octane Number Measuring Machine (Research Method), ASTM D2699 Gasoline Octane Number
Measuring Machine (Research Method)
Technical indicators:
1.The instrument body is a standard type single-cylinder engine with variable compression ratio, equipped with
carburetor, intake air dryer, ignition system, signal sensor components, and power system.
2. Test method: support compression ratio method and interpolation method to assess oil; those two methods can meet
the national standard requirements.
3. Test standard: The instrument is a dual-purpose machine available for motor method and research method.
4. Test range: 40-120 octane numbers
5. Machine power: 12KW
6. Cast iron cylinder bore diameter: 82.55mm
7. Cast iron piston stroke: 114.3mm
8. Displacement: 0.61L
9. Valve clearance: 0.20mm for inlet valve; 0.25mm for exhaust valve
10. Spark plug clearance: 0.5mm
11. Compression ratio adjustment range: 4:1~18:1; the compression ratio can be automatically and manually controlled;
the compression ratio adjustment motor can rotate forward and backward, with deceleration self-locking function to
ensure that the position is fixed after adjustment to the proper place.
12. Engine speed: (900±9) r/min for motor method; (600±6) r/min for research method;
13. Oil pressure ≥0.15MPa (Indication on the oil pressure gauge) at the operating temperature;
14. Lubricating oil temperature: (57±8)ºC, with the auxiliary lubricating oil preheating function;
15. Air heating temperature: 165±1ºC for motor method: 52±1ºC for research method (Computer digital display)
16. Cooling water temperature: (100±1)ºC (Computer digital display)
17. Ignition advance angle: motor method ε 5.0 BTDC (26±1.5 °)
Research method BTDC 13°
18. Repeatability: for motor method, 80-90 octane number, with allowable tolerance of ≤ 0.3/M
For research method, 90-110 octane number, with allowable tolerance of ≤ 0.2/R
Instrument characteristics
1. Control cabinet is newly and industrially designed, with metal painting, beautiful and durable.
2. 17-inch industrial control computer touch screen is designed, with the new software operating interface based on
WIN7 system, to ensure the function options at a glance, easy to operate, having the software program built-in work
curve with proprietary intellectual property rights.
3. With the atmospheric pressure automatically compensated by computer, the atmospheric pressure compensation
curve is configured, avoiding the trouble of manual checking.
4. Two-stage oil filter is used, to provide clean oil, effective lubrication and cooling, ensuring that the engine is
running efficiently and extending the service life.
5. The combined belt pulley is used, fast and easy to achieve switchover between Research Method and Motor
Method.
6. The mixed heater with new size is used, without any dismantlement when switching between Research Method and
Motor Method.
7. Large cable connection is used, neat and artistic, with the separation of strong and weak electricity, eliminating the
electromagnetic interference to ensure stable and reliable data transmission.
8. The engine ignition advance angle can be displayed in real time, to facilitate to check the operation conditions, with
Motor Method automatically corresponded with the compression ratio.
9. Stainless steel cooling tower is used, to avoid corrosion in the internal circulating water channel, improving the
cooling effect of the cylinder liner.
10. Intake configuration: The dual-circulation refrigeration ice tower is professionally configured, to ensure 2-4ºC
temperature, with constant temperature and humidity; oil and gas mixer can be atomized fully, improving
combustion efficiency, reducing carbon deposition and improving data stability and repeatability.
11. Large-capacity high-efficient cooling circulating machine is used, to maintain the heat-sink cooling of water tower
in the test process, with water-saving and environmental protection.
12. Pressure monitoring in the engine crankcase is made, to know the sealing performances of piston, piston ring and
cylinder liner at any time and to grasp the engine running state at any time, and to check whether the instrument's
test conditions are stable intuitively in real time.
13. Exhaust configuration: the instrument is equipped with a muffler.
14. Ignition system: Hall ignition (Magnetic induction ignition) patented technology is used, with repeatability of less
than 0.2/R octane number. Magnetic knock sensor is used, to provide the stable knock signal and to improve the
knock signal display sensitivity and anti-interference ability, providing the favorable conditions for subsequent
signal conversion and processing; signal transmission setting is provided, to normalize the knock signals for
interchangeability.
15. The linear displacement sensor is used, which can directly detect the slight change of the cylinder height, to meet
the high precision and thermal stability requirements; upper and lower limits are provided for cylinder height, safe
and reliable.
16. Lubrication system: with the auxiliary lubricating oil preheating function, auxiliary heating and temperature control
are made for the engine lubricating oil, greatly speeding up the preheating speed, to allow the instrument quickly
into the test conditions to meet the test conditions.
17. Oil system: three new parallel oil tanks are configured, with floats, needle valve and liquid level tube in their own
separate space respectively, without any interface each other when adjustment. Fourth oil cup is optional for
refrigeration, suitable for the test of light component oils.
18. Safety system: with emergency stop function.
19. Control technology: with data acquisition, automatic calculation, automatic control, automatic look-up table, print
and prompts and other functions. The system is preset with "octane number ~ compression ratio" inside, to achieve
automatic look-up table function, with wide compatibility, easy to upgrade.
20. Engine running pressure negative pressure meter can display in real time.
21. Engine power indication: digital screen display.
22. Standard voltage-stabilized power supply is provide, reducing the impact of external factor on the test data.
23. 300 test records are scroll saved, with text (.tet) and spreadsheet (.xls) file save function provided.
24. The boot and test cumulative time can be automatically recorded, with the maintenance tips displayed automatically.
25. Power supply voltage: 380±10% VAC, 50±1Hz 220±10% VAC, 50±1Hz
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