CFR-A1 Gasoline Octane Rating Tester
CFR-A1 gasoline octane number tester is suitable for the octane number determination of gasoline for automobiles and spark-ignition aviation engines (including motor method and research method). The test range is 40~120 O.N. The integration of multiple patented technologies brings users superior user experience and accurate and reliable measurement results.

Applicable standards: GB/T 5487、ASTM D2699、IP 237、EN ISO 5164 GB/T 503、ASTM D2700、IP 236、EN ISO 5163

Product Features

CFR standard cast iron integral cooling jacket, cylinder and cylinder head integral casting


CFR standard crankcase, five gears with double balance module, right engine, front cranking system


The design, manufacture and inspection of major mechanical parts such as integrated cylinder, clamp, piston and carburetor components strictly comply with standards


One machine with two uses, using combined pulleys and a new mixed heater to achieve fast switching between motor method and research method


Built-in octane number and compression ratio relationship curve, simple and accurate test


Real-time automatic display of ignition angle, lubricating oil temperature, intake temperature, mixture temperature, compression ratio, cooling water temperature, speed and other working conditions, and with abnormal alarm prompt function


Precision laser displacement sensor, no delay in adjustment, accurate positioning of cylinder height, and limit safety protection function


Built-in atmospheric pressure automatic Compensation module, which performs air pressure compensation during the test


Dynamic liquid level search function, simplifies the maximum knock signal adjustment


Compression ratio automatic adjustment, limit safety protection


The vertical fuel nozzle and the fourth oil cup have refrigeration function to meet the light component oil test


The four-cup falling liquid level carburetor using the falling horizontal program, 4 independent horizontal nozzles and 1 vertical nozzle, accurately controls the fuel-air ratio


High-power dual-circulation air regulator (ice tower), effectively supports the intake requirements of large-cylinder engines


High-power cold water circulation machine, water tank capacity ≥60L, water pressure: 0.2~0.4Mpa, working water temperature: 15~25℃


High-precision knock sensor, millisecond response, cooperate with the fully automatic digital knock meter to automatically record data and calculate results


Two-stage oil filtration and lubricating oil cooling function to ensure long-term stable operation of the equipment


Standard oil preheating function to shorten the warm-up time


Automatically collect test data and save large-capacity data


Automatically record the instrument running time and give prompts according to the instrument maintenance requirements


Start-up and test cumulative time record



Technical Specifications
Test Method   
Meet GB/T 5487, GB/T 503, ASTM D2699, ASTM D2700,IP 236,IP 237,EN ISO 5163,EN ISO 5164
Octane test range40 ~ 120
Cast iron cylinder diameter82.55mm(3.250inch)
Piston stroke114.30mm(4.50inch)
Cylinder capacity0.61L(37.33in3)
Compression ratio adjustment range4:1 ~ 18:1
Engine speedMotor method: 900rpm ± 9rpm

Research method: 600rpm ± 6rpm

Inlet and exhaust valve clearance (in operation and hot state)0.20mm ± 0.025mm(0.008in ± 0.001in)
Spark plug gap0.51mm ± 0.13mm(0.020in±0.005in)
Lubricating oil pressure172 ~ 207kPa(25psi ~ 30psi)
Lubricating oil temperature57℃±8℃(135℉±15℉)
Cylinder jacket coolant temperature100℃±1.5℃(212℉±3℉)
Motor method mixture temperature149℃±1℃(300℉±2℉)
Motor method intake air temperature38℃±2.8℃(100℉±5℉)
Research method intake temperature52℃±1℃ (125℉±2℉) (under standard atmospheric pressure)

Corrected with atmospheric pressure, maintained within ±1℃

Ignition advance angle (real-time display)Motor method: 26° btdc (ε=5.0), automatically adjusted by computer according to compression ratio

Research method: 13° btdc, fixed

Communication interfaceUSB
Data OutputLIMS or Printer
Machine power15KW
Instrument use environmentTemperature: 5~35℃; Humidity: 20~90% RHTemperature: 5~35℃; Humidity: 20~90% RH
Instrument power supplyAC380V±10%,50Hz AC220V±10%,50Hz
Dimensions1650mm wide × 900mm deep × 1420mm high
Net weight of instrument1200 KG