This device is what actually generates combustion and in turn provides heat to the appliance (boiler, furnace, water heater). It has a fuel pump, motor to drive an air fan, and an ignition system.
A burner that atomizes fuel oil and blows it into the combustion chamber in the form of a fine mist or vapor. Steam or mechanical motion plus air may be used as the operating medium.
An oil burner engine is a machine that uses oil as its fuel. The term is often used with reference to a train or ship engine that burns oil to produce steam that drive the turbines, from which the power is derived. Some engines of this form were originally designed to be coal powered and were converted.