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EK-Motor : 2020/OCT/01 – 2022/JUL/06 – 2023/OCT/03
Question
Q1. (a) Sketch a main engine electronically controlled fuel injection system (6)
(b) Explain how fuel injector quantity and timing is changed in the fuel injection system sketched in part (a) (6)
(c) State why it may be necessary to change engine fuel timing (4)
Asked in Year/Month/Ques No.
Marker's Feedback
2020/OCT >> Sketches for part a) were often not detailed enough for the marks available and so the answer to part b) which asked for an explanation using the sketch in part a) was not very detailed. For part c) many candidates did not seem to understand that fuel ignition quality influenced injection timing.