Research Octane Number (RON) / Motor Octane Number (MON) Rating Unit

CFR-specification diesel engine at the heart of the instrument: 82.55 mm cast iron cylinder, 114.30 mm piston stroke and 8:1 – 36:1 compression ratio range
CFR-48 standard crankcase with 5 gears, 2 balance modules and a large-capacity oil lubrication system
Engine mounted on the right side with the turning check system at the front, consistent with the layout specified in ASTM D613 and GB/T 386
CR adjusting handwheel located at the front of the engine (90° to the engine), with automatic adjustment and a prompt to remove carbon deposits
Cylinder head, cylinder block, piston, CR plug, injector nozzle and other major mechanical components designed and manufactured to international standards

Automatic CR adjustment, automatic switching of fuel bowls and automatic flushing of fuel pipelines; the complete test runs with a single button
Automatic detection and adjustment of fuel flow
Independent, dedicated pipeline for engine warm-up, saving fuel
Variable compression ratio piston adjusted automatically and precisely, with no manual handwheel operation

Integrated control module monitors working conditions in real time and raises an alarm in abnormal situations
Powerful cooled water circulator connected to and controlled by the host computer, with real-time display of cooling water temperature
Laser micrometer system reads the handwheel and delivers test results directly, with no manual reading or calculation
Fuel flow controlled by automatic photoelectric measurement, with the flow rate adjusted automatically by computer
Two-stage oil filtering and cooling for long-term stable operation

Integrated high-precision torque sensor detects the propulsion torque of the variable CR plug, reflecting combustion chamber carbon deposition in real time
Built-in WIFI lets the operator monitor and query data remotely
Negative-pressure sensor displays engine operating pressure in real time
Automatic overload protection for compression ratio adjustment
Start-up time and accumulated test time are recorded automatically

Engine
Test methods	ASTM D613, IP 41, EN ISO 5165, GB/T 386
Cetane number range	0 – 100 (typical testing range 30 – 85)
Cast iron cylinder bore (diameter)	82.55 mm (3.250 in)
Piston stroke	114.30 mm (4.50 in)
Cylinder displacement	611,729.10 mm³ (37.33 in³)
Compression ratio range	Adjustable 8:1 – 36:1, adjusted automatically by computer
Engine speed	900 ± 9 rpm
Operating conditions
Injection flow rate	13.0 ± 0.2 mL/min
Injection pressure	10.30 ± 0.34 MPa (1500 ± 50 psi)
Injection timing	13.0° ± 0.2° BTDC
Injector coolant passage temperature	38 ± 3 °C (100 ± 5 °F)
Intake air temperature	66 ± 0.5 °C (150 ± 1 °F)
Cylinder jacket coolant temperature	100 ± 2 °C (212 ± 3 °F)
Basic compression pressure	3275 ± 138 kPa (475 ± 20 psi)
Crankcase internal pressure	−0.25 to −1.5 kPa
Lubricating oil pressure	172 – 207 kPa (25 – 30 psi)
Lubricating oil temperature	57 ± 8 °C (135 ± 15 °F)
Intake and exhaust valve clearance (engine running and hot)	0.20 ± 0.025 mm (0.008 ± 0.001 in)
Fuel pump inlet pressure	Fuel level 635 ± 25 mm (25 ± 1 in) above the centreline of the fuel injection pump inlet
System and installation
I/O port	USB
Data export	LIMS, WIFI or printer
Machine power	15 kW
Power supply	AC 380 V ± 10%, 50 Hz AC 220 V ± 10%, 50 Hz
Ambient conditions	15 – 35 °C, 20 – 90% RH, non-condensing
Dimensions (W × D × H)	1520 × 850 × 2000 mm
Weight	1200 kg

Technical specifications