Q5. a) Describe, with the aid of a sketch, the arrangement of the Gas and liquid fuel systems at the cylinder of a dual fuel 4-stroke engine, stating the input and output signals at the controller.
(b) Describe the arrangement of the gas fuel piping system used for a 4 stroke dual fuel engine with safety features incorporated.
Q1. Marine diesel engines run on the diesel cycle. With the introduction of natural gas as marine fuel, Otto cycle is also employed in some engines. Explain the difference between the two cycles and elaborate on the suitability of natural gas as a fuel in such engines. (16)
Q6. a. Describe, with the aid of a sketch a diesel engine fuel system which employs direct injection of liquid gas into the cylinders. (12)
b. Explain the advantages of this type of gas injection system compared with the use of gaseous fuel in the form of gas. (4)
Q1. a) Explain why pilot injection is required for a Dual fuel engine when burning natural gas. (2)
b) Describe, with the aid of a sketch, the arrangements for a dual fuel engine which is capable of burning natural gas on;
a) The otto cycle (7)
b) The Diesel cycle (7)
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