Car intercooler pipe having low vibration properties

Abstract

A car intercooler pipe includes an inlet of the intercooler pipe positioned at an upper side of the car intercooler pipe, an upper corrugated portion having upper corrugated bodies protruding in a rib shape from a surface of a pipe body extending in a direction toward the inlet, an outlet of the intercooler pipe positioned at a lower side of the car intercooler pipe, a lower corrugated portion, and an intermediate portion bent downward from the upper corrugated portion and having the pipe body connected to the lower corrugated portion, wherein a thickness of the pipe body of the intermediate portion is greater than a thickness of the upper corrugated body of the upper corrugated portion and a thickness of the lower corrugated body of the lower corrugated portion, and wherein disconnection portions having corrugations with different heights are formed in the upper corrugated body and the lower corrugated body.

What is claimed is: 
     
       1. An intercooler pipe for a vehicle, comprising:
 an inlet at an upper portion of the intercooler pipe; 
 an upper bellows portion having an upper bellows body which protrudes in a rib shape from a surface of a pipe body extending in a direction toward the inlet; 
 an outlet at a lower portion of the intercooler pipe; 
 a lower bellows portion having a lower bellows body which protrudes in a rib shape from a surface of the pipe body extending in a direction toward the outlet; and 
 an intermediate portion, which has the pipe body, bent downward from the upper bellows portion toward the lower bellows portion and connected to the lower bellows portion, 
 wherein each of the upper bellows body and the lower bellows body has disconnection portions having corrugations with different heights; 
 wherein a thickness of the pipe body of the intermediate portion is greater than a thickness of the upper bellows body and a thickness of the lower bellows body, such that mass of the intermediate portion is larger than those of the upper bellows portion and the lower bellows portion to have variable mass between the inlet and the outlet, 
 wherein the upper bellows portion and the lower bellows portion include a thermoplastic polyester elastomer (TPC-ET) synthetic resin having dicarboxylate-diol polymer and glycol polymer as a soft synthetic resin material, 
 wherein the intermediate portion includes a thermoplastic polyester synthetic resin as a hard synthetic resin material such that stiffness varies between the inlet and the outlet, and 
 wherein the amount of change in impedance of the intercooler pipe increases as amounts of mass and stiffness vary between the inlet and the outlet, so that a progressive wave of vibration is reflected and vibration transmitted through the intercooler pipe is reduced. 
 
     
     
       2. The intercooler pipe of  claim 1 , wherein the disconnection portions are disposed in rows in the form of straight lines in a longitudinal direction of the intercooler pipe so that force required to bend the intercooler pipe in a particular direction and force required to bend the intercooler pipe in another direction are different from each other. 
     
     
       3. The intercooler pipe of  claim 2 , wherein the rows, which are constituted by the disconnection portions, include two or more rows disposed to be adjacent to one another in the longitudinal direction on each of the upper bellows body and the lower bellows body, and the rows are formed at positions spaced apart from each other around each of the upper bellows body and the lower bellows body. 
     
     
       4. The intercooler pipe of  claim 1 , comprising:
 a connector having a stopper protruding from an inner circumferential surface of the connector and coupled to an end of the intercooler pipe to fasten the intercooler pipe to a connecting port of a throttle body, 
 wherein when the connecting port is inserted into the connector, the stopper is engaged with and fastened to a catching projection protruding from an outer circumferential surface of the connecting port, and the connector permits a rotation of the intercooler pipe in the connecting port. 
 
     
     
       5. The intercooler pipe of  claim 4 , wherein a rubber seal, which seals a portion between the connector and the connecting port when the connector is fastened to the connecting port, is mounted in the connector, and at least one of a frictional force between the rubber seal and the connector and a frictional force between the rubber seal and the connecting port is set to be small enough to permit the rotation of the connector.