Patent ID: 7404293
Filing Date: 2008-07-29
Classification: F02B,F02D,Y02T

Abstract:
1. An intake system for a supercharged engine, comprising: an intake passage configured to supply air to the engine; a supercharger disposed in the intake passage and configured to compress the air supplied to the engine; a throttle valve disposed in the intake passage downstream from the supercharger, and configured to regulate a volume of the air supplied to the engine; a blow-off passage configured to provide fluid communication between an upstream side of the throttle valve and an upstream side of the supercharger; a blow-off valve configured to open and close the blow-off passage; a throttle rate-of-change detecting device configured to detect a rate-of-change of a throttle valve opening; and a blow-off valve control system configured to control actuation of the blow-off valve based on pressure on a downstream side of the throttle valve, and to actuate the blow-off valve to close the blow-off passage when a detection value from the throttle rate-of-change detecting device when the throttle valve is opened exceeds a preset rate-of-change value.