Patent ID: 6769255
Filing Date: 2004-08-03
Classification: F02B,F02D,Y02T

Abstract:
A variable nozzle opening control unit for an exhaust turbine supercharger comprising:a nozzle opening adjuster for adjusting an opening of a variable nozzle of said exhaust turbine supercharger; a load detector for detecting a load of an internal combustion engine with said exhaust turbine supercharger connected thereto; and a control unit for controlling operations of said nozzle opening adjuster, wherein said control unit is previously set to provide controls so that an opening of said variable nozzle is set to and maintained at the substantially maximum value when the load of said internal combustion engine is in the low load region and also so iliac the opening of said variable nozzle is gradually made smaller, when the load is not less than a first prespecified load value, as the load becomes higher; and the opening of said variable nozzle in the original high load mode is maintained or made smaller, after the load of said internal combustion engine shifts from the high load region to the low load region, for a first prespecified period of time, and then is set to a preset opening after the first prespecified period of time has passed.