Question

How many times is the fuel being injected in one cycle of a modern automotive diesel engine?

(a) 5-7

(b) 7-10

(c) 4-5

(d) 10-12

This question was posed to me at a job interview.

Asked question is from Modern Common Rail Fuel Injection System topic in section Diesel Engine Fuel Supply System of Automotive Engine Design

Answer 1

In modern automotive diesel engines, particularly those equipped with a common rail fuel injection system, fuel is often injected multiple times during a single engine cycle to improve combustion efficiency, reduce emissions, and enhance performance. The common rail system allows for multiple injections of fuel per cycle, typically ranging from 5 to 7 injections, depending on the engine design and operational conditions.

Final Answer:

(a) 5-7.