According to standard ASTM D2699 (RON), cfr octane engines Intake Air Temperature (IAT) is set 52±1°C (125 ± 2°F). It is specified for operation at standard barometric pressure of 101.0 kPa (29.92 in. Hg).
According to standard ASTM D2700 (MON), cfr octane engines Intake Air Temperature(IAT) is set 38 ±2.8°C (100±5°F), Intake Mixture Temperature—149±1°C (300 ±2°F) maintained within 1°C (62°F). When CR or KI results used for octane determination on each fuel are collected.
It’s very convenient to set the Intake temperatures on Octane engine FTC-M2. Intake temperature is set automatically as the test method (Research/Motor) is chose. It does not need to manually set and adjust intake air/mixture temperatures during octane rating operation.
Temperature measurement of cfr engines operating conditions is performed using mercury in glass thermometers. The conditions for temperature measurement are as follows:
① Thermometer for Intake Air Temperature
② Thermometer for Intake Mixture Temperature
③ Thermometer for Jacket Coolant Temperature
The temperature controllers are constructed in operation panel of the cfr engines. The temperature controllers are as follows:
① Intake Air Temperature Controller
② Intake Mixture Temperature Controller
③ Lubricating Oil Temperature Controller
The temperatures can be adjusted manually using the temperature controllers, in addition to the automatic temperatures setting feature in the upgraded octane engines system.