Patent ID: 9689275
Date: 2017-06-27
CPC Classifications: F01D,F02B,F05D,Y02T

Claim:
1. A variable geometry turbo system that controls a flow of exhaust gas introduced into a turbine of a turbo charger, the system comprising: a vane base ring in which the turbine is positioned at a center thereof; a fixed vane which is fixed onto a first surface of the vane base ring to guide the exhaust gas introduced into the turbine; a variable vane which is pivotally positioned on the first surface of the vane base ring and adjacent to the fixed vane so as to vary a flow path of the exhaust gas introduced into the turbine; a vane cover ring fixed to the vane base ring with the fixed vane and the variable vane interposed therebetween; and an actuating module coupled to the variable vane and selectively actuating the variable vane, wherein a variable pin is formed at a portion where the variable vane and the fixed vane are engaged with each other and the variable pin is disposed in a middle of the vane base ring in a radial direction of the vane base ring, wherein a convex curved surface is formed on an outer end of the variable vane to correspond to an outer circumference of the variable pin, and wherein a concave curved surface is formed on an inner end of the fixed vane to correspond to the convex curved surface, and wherein the fixed vane is formed to be concavely curved toward the turbine, wherein the fixed vane and the variable vane are configured to be linearly aligned at the variable pin when the variable vane is rotated toward the turbine, and the fixed vane and the variable vane are configured to form a bent angle with respect to each other at the variable pin when the variable vane is fully rotated distally from the turbine, wherein the fixed vane is leading and the variable vane is trailing relative to the direction of the exhaust gas flow.