An EGR device has a housing defining an EGR passage through which an EGR gas flows; a shaft rotatably supported by the housing through a bearing; a valve body adjusting a flow passage area of the EGR passage by rotating along with the shaft; and an actuator connected to one end portion of the shaft to drive the shaft. The bearing has a first bearing supporting one end portion of the shaft and a second bearing supporting the other end portion of the shaft. Moreover, a sealing member preventing fluid from flowing into the actuator is disposed at one end portion of the shaft. The housing has the chamber which accommodates the second bearing and is isolated form the exterior. The second bearing is made of a PPS resin material to which a fluororesin material is added. Thus, the second bearing is not corroded even if exposed to an atmosphere of strong acid.

Exhaust gas recirculation valve actuator device in an internal combustion engine, comprising an actuator body housing where the stem of an exhaust gas recirculation valve, extends along an axial direction. A motor acts to move the recirculation valve along the axial direction X-X, to pass from an open configuration to a closed configuration. A transmission is interposed between the motor and the exhaust gas recirculation valve. The device also includes support and guide mechanism and a sealing mechanism, in correspondence of a connection interface of the actuator body with an associable valve body, which houses an exhaust gas passage duct, wherein the actuator body is mechanically separable/connectable from/to said associable valve body.

Exhaust gas recirculation valve actuator device in an internal combustion engine, comprising an actuator body housing where the stem of an exhaust gas recirculation valve, extends along an axial direction. A motor acts to move the recirculation valve along the axial direction X-X, to pass from an open configuration to a closed configuration. A transmission is interposed between the motor and the exhaust gas recirculation valve. The device also includes support and guide mechanism and a sealing mechanism, in correspondence of a connection interface of the actuator body with an associable valve body, which houses an exhaust gas passage duct, wherein the actuator body is mechanically separable/connectable from/to said associable valve body.

Exhaust gas recirculation valve actuator device in an internal combustion engine, comprising an actuator body housing where the stem of an exhaust gas recirculation valve, extends along an axial direction. A motor acts to move the recirculation valve along the axial direction X-X, to pass from an open configuration to a closed configuration. A transmission is interposed between the motor and the exhaust gas recirculation valve. The device also includes support and guide mechanism and a sealing mechanism, in correspondence of a connection interface of the actuator body with an associable valve body, which houses an exhaust gas passage duct, wherein the actuator body is mechanically separable/connectable from/to said associable valve body.

Exhaust gas recirculation valve actuator device in an internal combustion engine, comprising an actuator body housing where the stem of an exhaust gas recirculation valve, extends along an axial direction. A motor acts to move the recirculation valve along the axial direction X-X, to pass from an open configuration to a closed configuration. A transmission is interposed between the motor and the exhaust gas recirculation valve. The device also includes support and guide mechanism and a sealing mechanism, in correspondence of a connection interface of the actuator body with an associable valve body, which houses an exhaust gas passage duct, wherein the actuator body is mechanically separable/connectable from/to said associable valve body.

An assembly (1), comprising: a first pipe (11), a second pipe (12), forming a bypass for a portion of the first pipe (11), comprising a compressor (15), a flap, in one of the second pipe (12) and said portion, movable between: a first position allowing the fluid to circulate predominantly in said portion, and a second position allowing the fluid to circulate predominantly in the second pipe (12), a maintaining member configured to bring or keep the flap (3) in the first position, the flap (3) going from the first to the second position when the pressure variation generated by the compressor (15) exceeds a predefined value,
the wall of the second pipe (12) and the flap (3) being configured to define a passage section, said section increasing as soon as possible when said flap (3) closes off said portion.

An assembly (1), comprising: a first pipe (11), a second pipe (12), forming a bypass for a portion of the first pipe (11), comprising a compressor (15), a flap, in one of the second pipe (12) and said portion, movable between: a first position allowing the fluid to circulate predominantly in said portion, and a second position allowing the fluid to circulate predominantly in the second pipe (12), a maintaining member configured to bring or keep the flap (3) in the first position, the flap (3) going from the first to the second position when the pressure variation generated by the compressor (15) exceeds a predefined value,
the wall of the second pipe (12) and the flap (3) being configured to define a passage section, said section increasing as soon as possible when said flap (3) closes off said portion.