Leak inspection apparatus of vehicle egr velve

Abstract

The present invention relates to a leak inspection device for an EGR valve for a vehicle, wherein a sealing shaft (20) is configured to prevent leak inspection air from leaking out through a vent hole (14) formed inside the exhaust gas circulation passage inside the EGR valve (10), by being inserted through the exhaust gas outlet (13) of the EGR valve (10) and supplying leak inspection air through the mounting part (11) and the exhaust gas inlet (12) while the mounting part (11), the exhaust gas inlet (12), and the outlet (13) of the EGR valve (10) are sealed, thereby allowing inspection of whether the supplied air leaks out after processing the EGR valve (10), thus having the effect of preventing product defects.

Description

Technology Field

[0001] The present invention relates to a leak inspection device and a leak inspection method for an EGR valve for vehicles. Background Technology

[0003] The exhaust gas recirculation system, also commonly known as EGR (Exhaust Gas Recirculation), reduces nitrogen oxides (NOx) in exhaust gases by recirculating a portion of the exhaust gas back into the intake system to lower the peak temperature during combustion of the mixture, thereby reducing the amount of NOx produced.

[0004] The exhaust gas recirculation system detects the engine's rotational speed (rpm), the temperature of the coolant, and the opening of the throttle valve through the Electronic Control Unit (ECU) installed in the vehicle, and operates the Exhaust Gas Recirculation (EGR) valve. At this time, when the EGR valve opens, the exhaust gas that was being discharged into the exhaust manifold due to the differential pressure between the intake and exhaust is supplied to the combustion chamber through the intake manifold via the exhaust gas recirculation pipe to recirculate the exhaust gas.

[0005] Since these EGR valves must maintain a vacuum state, it is essential to inspect whether gas leaks after product processing. Prior art literature

[0007] Korean Patent Publication No. 10-2018-0080031, 'EGR valve inspection device' The problem to be solved

[0008] Therefore, the objective of the present invention is to provide a leak inspection device and a leak inspection method for a vehicle EGR valve to inspect whether gas leakage occurs in the EGR valve after processing is completed. means of solving the problem

[0010] According to the above purpose, the present invention relates to a leak inspection device for an EGR valve for a vehicle, wherein a sealing shaft (20) is configured to seal the exhaust gas circulation passage formed inside the EGR valve (10) so that air supplied through the exhaust gas circulation passage formed inside the EGR valve (10) is not leaked out, by supplying leak inspection air through the mounting part (11) and the exhaust gas inlet (12) while the mounting part (11), the exhaust gas inlet (12), and the exhaust port (13) of the EGR valve (10) are sealed, and the sealing shaft (20) comprises a pair of O-rings (21) installed in the front part and positioned on each side of the vent hole (14) to seal each side of the vent hole (14), and a sealing shaft (20) installed between the pair of O-rings (21) to maintain the gap between the O-rings (21). The device is characterized by including a spacer (22), wherein the spacer (22) includes a protruding support (23) that is in close contact with the O-ring (21) installed on both sides and fixes the O-ring (21) so that it is positioned on both sides of the vent hole (14), and an open groove (24) that forms a passage for air to flow so that the vent hole (14) is not completely blocked.

[0011] delete Effects of the invention

[0013] The present invention has the effect of preventing product defects by being able to inspect whether air supplied after processing of a vehicle EGR valve leaks out. Brief explanation of the drawing

[0015] FIG. 1 is a drawing illustrating the configuration of a vehicle EGR valve according to an embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating a configuration for sealing the interior for leak testing of a vehicle EGR valve according to an embodiment of the present invention. FIG. 3 is a detailed configuration diagram of the spacer of the present invention. FIG. 4 is a flowchart illustrating a leak inspection method for a vehicle EGR valve according to an embodiment of the present invention. Specific details for implementing the invention

[0016] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings.

[0017] FIG. 1 is a diagram illustrating the configuration of an EGR valve for a vehicle according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of FIG. 1 illustrating a configuration in which the inside of the EGR valve is sealed so that a leak test can be performed.

[0018] The leak inspection device for a vehicle EGR valve of the present invention is configured with a sealing shaft (20) that is inserted through the exhaust gas outlet (13) of the EGR valve (10) and, while the mounting part (11), exhaust gas inlet (12), and outlet (13) of the EGR valve (10) are sealed, supplies leak inspection air through the mounting part (11) and the exhaust gas inlet (12) to seal the vent hole (14) formed inside the exhaust gas circulation passage inside the EGR valve (10) so that the supplied air does not leak out.

[0019] Looking at the configuration of the sealing shaft (20) above, a pair of O-rings (21) are installed in the front portion while being inserted through the exhaust gas outlet (13), and the pair of O-rings (21) are fitted through the exhaust gas outlet (13) so that they are positioned on both sides of the vent hole (14), thereby sealing both sides of the vent hole (14) so ​​that the supplied air does not leak out through the vent hole (14), allowing for accurate leak testing.

[0020] The vent hole (14) regulates the vacuum pressure of the exhaust gas circulating in the EGR valve (10) so that normal operation can be achieved when the EGR valve (10) opens or closes according to engine operating conditions, and is formed on the inside of the exhaust gas circulation passage of the EGR valve (10) and is open to the outside.

[0021] These vent holes (14) must be sealed so that air supplied during leak testing does not leak out to the outside, and to this end, a pair of O-rings (21) are fitted so that they are positioned on both sides of the vent holes (14) to achieve sealing.

[0022] A spacer (22) may be installed between a pair of O-rings (21) that are fitted on both sides of the vent hole (14) to seal it, so that the spacing between the O-rings (21) is maintained to ensure that the sealing on both sides of the vent hole (14) is maintained and the vent hole (14) is not completely blocked.

[0023] Referring to FIG. 3, the configuration of the spacer (22) is described as follows: a support member (23) is formed to be in close contact with the O-rings (21) installed on both sides so that the gap between the O-rings (21) is maintained, thereby allowing the O-rings (21) to be placed at the correct positions on both sides of the vent hole (14) so ​​that the vent hole (14) is sealed, and an open groove (24) is formed to form a passage so that the vent hole (14) is not completely blocked while both sides are sealed with respect to the vent hole (14) by the O-rings (21).

[0024] The support member (23), which is formed in the shape of a protrusion, is in close contact with the O-ring (21) installed on both sides of the spacer (22) to fix the position of the O-ring (21) so that it is positioned on both sides of the vent hole (14), and is configured so that air can flow through the open groove (24) so ​​that the vent hole (14) is not completely blocked.

[0026] FIG. 4 is a flowchart illustrating a leak inspection method for a vehicle EGR valve (10) according to an embodiment of the present invention.

[0027] The leak inspection method for a vehicle EGR valve (10) according to the present invention comprises the steps of: sealing the mounting portion (11) of the EGR valve (10); sealing the exhaust gas inlet (12) and the exhaust gas outlet (13) of the EGR valve (10); inserting a sealing shaft (20) through the exhaust gas outlet (13) so that an O-ring (21) is positioned at the front and rear of the vent hole (14) to seal it; compressing the mounting portion (11), the exhaust gas inlet (12), and the exhaust gas outlet (13) so that the inside of the EGR valve (10) is sealed; supplying air to the inside through the mounting portion (11) and the exhaust gas inlet (12) while the EGR valve (10) is sealed; maintaining a vacuum state after the inside of the EGR valve (10) reaches a predetermined pressure; and inspecting whether air leaks in the vacuum state. It is accomplished.

[0028] In order to check for leaks in the EGR valve (10), the mounting part (11), the exhaust gas inlet (12), and the outlet (13) must all be sealed to ensure that the air supplied to the inside does not leak out at a certain pressure, and for this purpose, the mounting part (11) is first sealed.

[0029] After sealing the mounting part (11), the exhaust gas inlet and exhaust gas outlet (13)(13) of the EGR valve (10) are also sealed.

[0030] At this time, a sealing shaft (20) with a pair of O-rings (21) installed at the front is inserted through the exhaust gas outlet (13) so that the O-rings (21) are positioned on both sides of the vent hole (14) formed inside the exhaust gas circulation passage, thereby achieving internal sealing.

[0031] With the mounting part (11), exhaust gas inlet (12), and exhaust port (13) sealed, they are compressed to completely seal the inside of the EGR valve (10), and air is supplied to the inside through the mounting part (11) and the exhaust gas inlet (12) while sealed.

[0032] After supplying air, check whether the inside of the EGR valve (10) reaches a set pressure and maintain a vacuum state, preferably maintaining a pressure of 2 bar.

[0033] Air is supplied to the inside of the EGR valve (10) and pressure is maintained, and a leak test is performed by checking whether the supplied air leaks out to the outside.

[0035] Although specific embodiments have been described in the foregoing description of the present invention, various modifications may be made without departing from the scope of the present invention. Accordingly, the scope of the present invention should not be determined by the described embodiments but by the claims and equivalents thereof. Explanation of the symbols

[0037] (10)-- EGR valve (11)-- Mounting part (12)-- Exhaust gas inlet (13)-- Exhaust gas outlet (14)-- Vent hole (20)-- Sealing shaft (21)-- O-ring (22)-- Spacer (23)-- Support part (24)-- Open home

Claims

Claim 1 In a leak inspection device for a vehicle EGR valve, a sealing shaft (20) is configured to seal the exhaust gas circulation passage formed inside the EGR valve (10) so that air supplied through the exhaust gas circulation passage formed inside the EGR valve (10) is not leaked out, by supplying leak inspection air through the mounting part (11) and the exhaust gas inlet (12) while the mounting part (11), the exhaust gas inlet (12), and the exhaust port (13) of the EGR valve (10) are sealed. The sealing shaft (20) includes a pair of O-rings (21) installed in the front part and positioned on each side of the vent hole (14) to seal each side of the vent hole (14), and a spacer (22) installed between the pair of O-rings (21) to maintain the gap between the O-rings (21). A leak detection device for a vehicle EGR valve, characterized in that the spacer (22) includes a protruding support (23) that is in close contact with the O-ring (21) installed on both sides and fixes the O-ring (21) so that it is positioned on both sides of the vent hole (14), and an open groove (24) that forms a passage for air to flow so that the vent hole (14) is not completely blocked. Claim 2 delete

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