Question 50Motor Plants - Assistant Engineer
70% to passInjection pressure in a common rail fuel system is controlled by _______________.
Aengine speed
Bvarying the fuel pump piston stroke
Cvarying the injector needle valve clearance
Da bypass valve
AI Explanation
The correct answer is D) a bypass valve. In a common rail fuel system, the injection pressure is controlled by a bypass valve. This valve regulates the pressure in the common rail by allowing excess fuel to bypass the high-pressure fuel pump, thereby maintaining the desired injection pressure. This is done independently of engine speed (option A) or the fuel pump piston stroke (option B). The injector needle valve clearance (option C) determines the amount of fuel injected, but does not directly control the injection pressure.
Related Questions
Q63:A normally operating diesel engine is shutdown by_______________. Q492:Oil accumulating in the exhaust piping or manifold of a diesel engine can be cau... Q204:A magnetic strainer is primarily used in diesel engine reduction gear oil system... Q149:The diesel engine rocker arms shown in the illustration serve to_______________.... Q322:What is the function of the aftercoolers installed in the diesel engine air inta...
Ready to test your knowledge?
Take a Motor Plants - Assistant Engineer Practice ExamOfficial Resources