To reduce NOx, to reduce THC, to reduce combustion noise, and to avoid a misfire, at the highland, in a control device of a diesel engine.
This supercharging diesel engine with an intercooler performs intercooler bypass control for bypassing the intercooler to the whole or partial suction air, when an engine load is in a predetermined low-medium load area or when supercharging pressure is a predetermined value or less, in a low atmospheric pressure environment (Step 106), and also performs swirl ratio reduction control for increasing fuel injection pressure, by reducing the swirl ratio, when the engine load is in a medium-high load area or when the supercharging pressure exceeds the predetermined value, in the low atmospheric pressure environment.
COPYRIGHT: (C)2008,JPO&INPIT
Akitoshi Tomoda
Michio Furuhashi
Naofumi Kurata
Koichiro Nakatani
Tomoyoshi Kogo
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Mamoru Takada
Hidekazu Onishi