QuestionJuly 9, 2025

What would the phase angle be on a port-helix metering injection pump fueling a 4-stroke cycle diesel engine? 30 degrees 60 degrees 120 degrees 360 degrees

What would the phase angle be on a port-helix metering injection pump fueling a 4-stroke cycle diesel engine? 30 degrees 60 degrees 120 degrees 360 degrees
What would the phase angle be on a port-helix metering injection pump fueling a 4-stroke cycle diesel engine?
30 degrees
60 degrees
120 degrees
360 degrees

Solution
4.4(352 votes)

Answer

360 degrees Explanation 1. Understand the 4-stroke cycle A 4-stroke engine completes a power cycle in 720 degrees of crankshaft rotation (2 revolutions). 2. Determine phase angle for injection The injection pump must inject fuel once every cycle, which corresponds to one injection per 720 degrees. 3. Calculate phase angle Since the pump operates on a single cycle, the phase angle is **360 degrees** for synchronization with the engine cycle.

Explanation

1. Understand the 4-stroke cycle<br /> A 4-stroke engine completes a power cycle in 720 degrees of crankshaft rotation (2 revolutions).<br /><br />2. Determine phase angle for injection<br /> The injection pump must inject fuel once every cycle, which corresponds to one injection per 720 degrees.<br /><br />3. Calculate phase angle<br /> Since the pump operates on a single cycle, the phase angle is **360 degrees** for synchronization with the engine cycle.
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