Bypass valve having EGR valve

Abstract

A bypass valve having an EGR valve in which the bypass valve and the EGR valve are assembled into a module is provided. The bypass valve having an EGR valve includes: an intake port formed in a side surface of a valve housing; a first exhaust port formed in another side surface of the valve housing and connected to a cooling flow channel of an EGR cooler; a second exhaust port formed 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 thereof so as to connect the intake port to the first and second exhaust ports; an EGR valve coupling section formed in the top surface of the valve housing close to the intake port; the EGR valve coupled to the EGR valve coupling section and partially located at a position of the gas transfer channel close to the intake port so as to pass or intercept exhaust gas; and a flap swingably disposed in the junction section so as to selectively open and close the first and second exhaust ports.

Description

technical field [0001] The present invention relates to a bypass valve installed on an exhaust gas recirculation system (Exhaust Gas Recirculation; EGR), in particular to an exhaust gas recirculation valve integrated bypass valve which integrates the bypass valve and the exhaust gas recirculation valve into a module. valve. 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 oxides is the greatest. [0004] Therefore, the permitt...

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Problems solved by technology

[0011] However, in the conventional exhaust gas recirculation system 10, since the above-mentioned exhaust gas recirculation valve (not shown) and the bypass valve (not shown) are dispersed and installed, the number of parts used to connect them increases accordingly.

Therefore, the structure is complicated, and it is not easy to reserve space when designing the engine

[0012] And there is a problem that the cooling efficiency of the exhaust gas using the exhaust gas recirculation cooler assembly 50 is poor, thereby reducing the reduction efficiency of nitrogen oxides, and there is a problem that the durability of the bypass valve-related components decreases during long-term use.

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