Engine_2014 : Motor Plants and Auxiliary Boilers - 318/2614
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| During the fuel injection period, fuel pressure must exceed cylinder gas pressure to __________ . |
| A) ensure penetration and distribution of the fuel in the combustion chamber |
| B) ensure the needle valve is flushed clean during each injection |
| C) allow combustion gas blowback into the open needle valve |
| D) prevent reflected pressure waves when the needle valve closes |
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