Patent ID: 8011185
Filing Date: 2011-09-06
Classification: F02D,F02M,Y02T

Abstract:
1. A boost pressure control method of an internal combustion engine including a turbocharger with a compressor and a turbine which is rotationally driven by exhaust of an internal combustion engine, and an EGR device, comprising: determining a rotation speed of the turbine; determining a boost pressure of the turbine; comparing a ratio of the boost pressure of the compressor to the rotation speed of the turbine with a predetermined value; performing EGR at a time of supercharge, or increasing an EGR amount at the time of supercharge in comparison with when supercharge is not performed if the ratio of the boost pressure of the compressor to the rotation speed of the turbine is greater than the predetermined value; and adjusting opening timing of the intake valve so that an engine generated torque is within a predetermined range and an internal EGR gas amount becomes maximum,