ABSTRACT
The modes of gaseous fuel introduction into dual-fuel engines vary widely in complexity of design and operation. These modes are of much importance and can control the progress of the combustion process and associated engine performance. In general, it is required that the admission of the gaseous fuel into the engine cylinder and its mixing with the required air should produce a homogeneous mixture with uniform properties at the time of pilot injection. This may not be an easy task to accomplish fully, especially when relatively simple approaches are adopted, while the alternative option for resorting to diesel engine operation is retained.
