Fuel Ignition Tester

The Derived Cetane Number (DCN) is obtained using Fuel Ignition Tester (FIT) manufactured by Waukesha Engine Dresser, Inc. This FIT unit utilizes a unique method of determining DCN by using a constant volume combustion chamber with direct fuel injection into heated, compressed air.

The combustion chamber is pressurized to 22 bar and heated to a temperature of around 577 °C prior to liquid fuel injection. Each fuel injection produces a single-shot, compression ignition combustion cycle. The fuel self-ignites and the time from injection to the start of combustion defines the ignition delay time. This ignition delay time is recorded and then correlated to calculate DCN value.

fuel ignition tester