Bypass valve for vehicle

Abstract

A bypass valve for a vehicle with excellent durability is provided, which can be easily manufactured with a simple structure, which can allow a flap for selectively discharging exhaust gas to smoothly work, and which does not cause an erroneous operation or a deformation in a long-term use. The bypass valve includes: an intake port formed in a surface of a valve housing; a first exhaust port formed in another surface of the valve housing and connected to a cooling flow channel of an EGR cooler; a second exhaust port formed to be adjacent to the first exhaust port and connected to a bypass flow channel of the EGR cooler; a gas transfer channel formed in the valve housing and having a junction section formed in the middle so as to connect the intake port and the first and second exhaust ports; a housing cover coupled to an opened side of the junction section; a shaft of which both ends are coupled to the valve housing and the housing cover and which is rotatably disposed in the junction section; a flap coupled to the middle of the shaft so as to selectively open and close the first and second exhaust ports; and a driving mechanism disposed on one side of the valve housing so as to cause the flap to swing.

Description

technical field [0001] The present invention relates to a bypass valve for a vehicle, and more particularly, to a structure that is simple to manufacture, and a cover for selectively discharging exhaust gas that operates smoothly and has durability that does not worry about operation errors or deformation even if it is used for a long time Excellent bypass valve for vehicles. Background technique [0002] In general, exhaust gas (emisson) is a gas generated when a mixed gas is combusted and discharged to the outside through an exhaust pipe, and includes harmful substances such as carbon monoxide (CO), nitrogen oxides (NOx), and unburned hydrocarbons (HC). [0003] Among the harmful substances contained in these exhaust gases, nitrogen oxides form an inversely proportional causal relationship with carbon monoxide and hydrocarbons. That is, when the fuel is completely combusted and the emissions of carbon monoxide and hydrocarbons are the least, the generation of nitrogen oxi...

AI Technical Summary

Problems solved by technology

[0010] However, due to the complex structure of the bypass valve used in the previous exhaust gas recirculation system 10, it is difficult to manufacture, and there is also the disadvantage that it requires a lot of money to manufacture.

In addition, when used for a long period of time, there is also a problem that the durability of the cover for selectively exhausting exhaust gas and related parts for operating the cover is significantly reduced.

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