Question 95Motor Plants - Assistant Engineer70% to pass
When is fuel injected into a cylinder of diesel engines?
AI Explanation
The correct answer is B) After air in the cylinder is compressed.
In a diesel engine, fuel is injected into the cylinder after the air has been compressed. This is because diesel engines use the heat generated by the compression of air to ignite the fuel, rather than using a spark like in a gasoline engine. By injecting the fuel after the air has been compressed, the high temperature and pressure inside the cylinder allows the fuel to ignite and burn efficiently, generating the power needed to drive the engine.
The other options are incorrect because: A) Fuel is not injected before compression, as there needs to be high temperature and pressure for ignition. C) Fuel is injected during the compression stroke, not after the expansion of combustion gases. D) Fuel is not injected as air is taken into the cylinder, but rather after the air has been compressed.
Related Questions
#93 As engine RPM is increased from idle speed to full load speed, which of the conditions listed will decrease? #94 The time between injection and ignition of the fuel is known as _______________. #96 For a given fuel, a change in the compression ratio will affect the ignition lag by which of the listed means? #97 Which area of the indicator diagram illustrated, indicates the ignition delay period in a diesel engine cylinder? Illustration MO-0033 #98 The rate of pressure rise during the period following fuel ignition in a diesel engine is influenced by the length of the ignition delay period and the _______________.