Exhaust gas recirculation valve actuator device (EGR) in an internal combustion engine and related exhaust gas recirculation valve assembly

An exhaust gas recirculation valve device in an internal combustion engine, comprising a valve body, and an actuator body housing

• a stem of an exhaust gas recirculation valve, extending along an axial direction,
• a motor of said exhaust gas recirculation valve that moves the exhaust gas recirculation valve along said axial direction, to pass from an open configuration to a closed configuration,
• a transmission, interposed between the motor and the exhaust gas recirculation valve,
• a support and guide mechanism of the exhaust gas recirculation valve,
• a heat reducing and sealing mechanism, in correspondence with a connection interface of the actuator body which is in contact with the valve body, which houses an exhaust gas passage duct, wherein the actuator body is mechanically separable from said valve body,
• wherein the stem of exhaust gas recirculation valve is made of a single integral piece with a closure valve head or poppet of the same valve,
• wherein the actuator device comprises a contactless position sensor, facing a portion of said stem provided with an emissive element, so as to detect its axial position, said contactless position sensor being housed in the actuator body;
• and
• wherein said connection interface of the actuator body comprises a recess which forms an expansion chamber or escape route for leaking exhaust gases coming from the valve body and reduces a contact surface between the connection interface and the valve body.