Variable guide vane device for exhaust gas-turbo charger of internal combustion engine of motor vehicle, has spacer formed of bolts, where diameter of bolts is designed smaller than clearance hole to create heat isolated free space

摘要

#CMT# #/CMT# The device (1) has supporting elements (2) that are held in a distance from each other via a spacer (3), where guide vanes are arranged between the supporting elements. The spacer is formed of connection bolts (4) that grip the supporting elements due to a clearance hole (5), where diameter of the connection bolts is designed smaller than the clearance hole for creating heat isolated free space (7). The spacer has a distance sleeve (8), whose inner diameter (DI) is larger than the diameter (DD) of the connection bolts. The supporting elements exhibit a step hole as the clearance hole. #CMT#USE : #/CMT# Variable guide vane device for an exhaust gas-turbo charger of an internal combustion engine of a motor vehicle. #CMT#ADVANTAGE : #/CMT# The diameter of the connection bolts is designed smaller than the clearance hole to create small heat isolated free space between the supporting elements and the guide vanes without unwanted functional impairment due to thermal occurrence, thus preventing direct heat passage from the connection bolts to the supporting element, and avoiding failure of the variable guide vane device, and hence achieving better efficiency of the variable guide vane device. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a longitudinal sectional view of a variable guide vane device for the exhaust gas-turbo charger of the internal combustion engine of the motor vehicle. DD : Diameter of connection bolts DI : Inner diameter of distance sleeve 1 : Variable guide vane device 2 : Supporting elements 3 : Spacer 4 : Connection bolts 5 : Clearance hole 7 : Free space 8 : Distance sleeve.