Fuel flammability tester CRU
Fuel Tech Japan Co., Ltd.

About This Product

CRU is an abbreviation for Combustion Research Unit. This model is based on FIA-100 technology and uses a common rail injection system, making it possible to conduct tests under various conditions for research on fuel combustion characteristics.

Regarding safety, high-temperature parts are covered, and various improvements have been made to make testing easier for users. CRU is based on the basic model (mk2), and various options can be selected according to each user's test and research theme. This is the latest model that can be updated even after use to support new research themes.

Please contact us regarding currently available options.

■Basic structure of fuel flammability tester (FIA-100.FCA.CRU)FIA-100 is a simple measuring instrument that injects a fixed amount of fuel into the combustion chamber by setting the combustion chamber to a fixed condition and controlling the fuel injection conditions using an electric heater and high-pressure air. The pressure and temperature of the combustion chamber can be set arbitrarily, allowing measurements under a variety of conditions. Unlike an actual engine, this measuring device can easily and accurately determine fuel combustion characteristics without being influenced by mechanical components such as pistons.

Evaluation method using fuel ignitability flammability tester
■Combustion curveUnder the specified temperature and pressure conditions, the pressure change in the combustion chamber is measured every 0.05ms up to 100ms for each fuel injection, and the pressure change caused by combustion during that time can be measured using the above definition.

■Heat release rate curveThe heat release rate can be calculated and displayed from the rate of pressure rise based on the combustion curve. By averaging data from 10 to 25 injections of the same fuel and creating a heat release rate curve, the combustion characteristics of that fuel can be accurately determined. It is also possible to calculate the amount of energy per injection amount of the fuel from the heat release rate curve.