1. Inject fuel in a chamber of high pressure at the end of compression stroke
  2. Inject fuel at a high velocity to facilitate atomization
  3. Ensure that penetration is not high
  4. All of the above
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Answer: Option 4

The injector nozzle of a compression ignition engine is required to inject fuel at a sufficiently high pressure in order to - Inject fuel in a chamber of high pressure at the end of compression stroke - Inject fuel at a high velocity to facilitate atomization - Ensure that penetration is not high

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