DieselShip's Online Content Library

Q1. Modern low-speed engines use electronically controlled common-rail fuel systems instead of jerk pumps. Explain:

(a) How fuel metering and injection timing are achieved independently of each other in such a system. (6)

(b) The role of the Engine Control Unit (ECU), hydraulic power supply, and the Injection Control Unit (ICU)/solenoid valves in achieving this. (6)

(c) Two operational advantages this decoupling of metering and timing gives over the conventional jerk pump system. (4)