ENGINE SUPERCHARGING DEVICE BY PARALLEL DOUBLE TURBOCHARGER

摘要

PPROBLEM TO BE SOLVED: To double action effect of a variable nozzle provided in a supercharging device by a double turbocharger operating with switching between single turbocharger operation and parallel double turbocharger operation. PSOLUTION: A variable nozzle type turbocharger is used for a turbocharger which is operated independently in a low engine speed zone to increase supercharging efficiency in low engine speed zone by adjustment of variable nozzle opening. At a time of switching from single turbocharger operation to double turbocharger operation, the variable nozzle is throttled once to prevent sudden drop of engine back pressure and supercharging pressure. PCOPYRIGHT: (C)2005,JPO&NCIPI