Capacity control valve with check valve

Abstract

The present invention provides a capacity control valve with a check valve. Even if hard foreign matter accumulates on the check valve part, the check valve part will not be damaged or operate abnormally. The capacity control valve has a valve body (12), a capacity control valve portion (14) and a check valve portion (16), and is characterized in that the check valve portion is arranged on the capacity control valve in a state where the peripheral end portion is fixed. Between the valve core of the part and the outlet hole, and composed of a composite plate of the valve core support plate (46) and a rubber-like elastic valve core plate (48), the valve core support plate has an outer periphery of the valve seat for the valve core to sit on part and at least one first fluid passage hole (54) formed radially inward compared with the outer peripheral part of the valve seat, and the rubber-like elastic valve core plate is superimposed on the outlet hole side of the valve core support plate in a state of close contact The surface has at least one second fluid passage hole (56) formed at a position not overlapping with the first fluid passage hole of the overlapping valve core carrier, and is configured by making the check valve part and the capacity control valve part close as one.

Description

technical field [0001] The present invention relates to a volume control valve with a check valve arranged in a fluid path, in particular an EGR (Exhaust Gas Recirculation) path. Background technique [0002] Among the exhaust gas countermeasures of internal combustion engines, such as internal combustion engines, EGR (exhaust gas recirculation) is known to be effective and widely used. Backflow into the intake air, thereby controlling the combustion temperature at a lower level and suppressing the formation of NOx. [0003] As a conventional intake and exhaust system to which EGR is applied, for example, the following configuration can be mentioned: as described in Patent Document 1 (particularly FIG. The intake path constituted by the intake pipe for supplying intake air to the engine, the EGR path constituted by the EGR pipe branched from the exhaust path and connected to the intake path, and within the EGR path, will be used to regulate the EGR The volume EGR valve (ca...

AI Technical Summary

Problems solved by technology

The solenoid valve device described in Patent Document 2 is not suitable for EGR, but is suitable for secondary exhaust gas purification by sending air into the exhaust gas immediately after the engine is started to burn unburned components in the exhaust gas. In the air control system, the reed valve constituting the solenoid valve device has the same structure as the reed valve used in Patent Document 1, so as in the case of Patent Document 1, there are problems such as that the reed does not operate normally and the reed is damaged.

In addition, in the secondary air control system, catalysts, mufflers, etc., which become exhaust resistance, are arranged on the downstream side of the exhaust path. The fluid pressure (exhaust air pressure) on the exhaust path side) tends to become extremely high, but the reed valve described in Patent Document 2 has a structure in which the reed is fixed in a cantilever shape, so the reed may not be able to resist Such a high fluid pressure (exhaust air pressure) causes plastic deformation to cause damage to the reed valve

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