Abstract
Experiment was carried out on a steady flow test bench by using constant pressure drop steady flow measurement method to explore the characteristics of intake port on diesel engine both under naturally aspirated and supercharged conditions. The results showed that: under naturally aspirated condition: with the increase of pressure drop, discharge coefficient and swirl ratio hardly varied at a certain valve lift; under supercharged condition: with the increase of pressure drop, discharge coefficient and swirl ratio decreased at a certain intake pressure; with the increase of intake pressure, discharge coefficient and swirl ratio increased at a certain pressure drop; under supercharge condition, discharge coefficient was higher than that under naturally aspirated condition and new method should be promoted to evaluate the intake port on supercharged diesel engine.
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