Q2. Unit injection is being widely used in many electronically controlled engines. Describe any one such system. What are its advantage compared to the conventional systems?
Q7. With reference to electronically controlled engines:
(a). Describe how fuel injection quantity and timing is adjusted.
(b). Describe how the exhaust valve timing may be varied.
(c). Describe how starting air valves are regulated.
Q6. Electronically controlled marine diesel engines are said to provide advantages over the traditional engines in the following areas
a) Improved fuel economy
b) Emission control
c)Engine response during manoeuvring, especially crash movements.
Explain how these are achieved.
Q8. Explain the reason, why the modern camshaft-less engines are known as intelligent engines. Describe briefly, the advantages and reliability of such an engine in comparison with the conventional marine diesel engines.
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