Shanghai Sinpar Scientific Instrument Co.,Ltd.
Engine Intake Air Humidity Control System

Engine Intake Air Humidity Control System

The Engine Air Humidity Control System is equipped with an adjustable refrigeration circulation system replacing the previous “ice tower”, used for chilling and dehumidifying intake air to research and motor method octane test engines. The air control system is connected through the humidifier tube to the carburetor for regulating the moisture content of intake air into octane engine at a constant 25-50 grains of moisture prescribed of dry air as specified by ASTM D2699, ASTM D2700, ASTM D2885.

The system provides constant filtered air, which is dehumidified through pipes and finned cooling heat exchangers in which refrigerant circulates.
The system is installed in a movable industrial cabinet, suitable for different laboratory space conditions.

Intake air humidity control system for cfr octane engine

Intake air humidity control refrigeration system

The Refrigeration System

is equipped with a separate stainless-steel reservoir of 5-liter refrigerating liquid.
The cooling temperature range could be from ambient temperature to -10°C with the stability of 0.5°C. The refrigerating temperature and time are adjustable via a digital control panel.
intake air control cooling circulation system

The Cooling Circulation System

circulates coolant to the carburetor of the octane test engine and to the fuel bowl that needs to be cooled, using a specialized pump, through coolant hoses connected with quick couplings. The system is ready to use when power is turned on.
intake air humidity control panel

The Operation Control Panel

includes a main power switch, a pump power switch, the refrigeration adjust-keys and a digital display for temperature controller.
The equipment comes with sound-light alarm, when it’s lack of cooling liquid.

Engine Air Control System Specifications

Applicable Standard
ASTM D2699, ASTM D2700, ASTM D2885
For RON and MON Methods Octane Engines
Operation Mode
Digital control panel
Temperature Cooling Range
From laboratory ambient to -10°C
Temperature Stability
Intake Air Chilling
Cooling Fluid Volume
5L liquid
Cooling Medium
Circulation Mode
A pump circulates the coolant from reservoir to engine carburetor
Connection Mode
Quick couplings
Power Switches
A main power switch and a pump power switch
Power Supply
220V 50Hz/60Hz with Single Phase
Safety System
Real-time Monitoring for Fluid Level & Temperature;
System Electrical Protection
95.00 kg
46x46x160cm (without humidifier tube)
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