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.

The invention relates to a device for converting a rotational motion of a valve element into a translational motion of same with: a valve element bearing-supported such that it is translationally movable along a translation axis, a cam element with a cam curvature, wherein the cam element is rotatable about an axis of rotation, wherein connected with the valve element is a stem by means of which the valve element can be moved translationally along the translation axis and which comprises an engagement element in engagement with the cam curvature, wherein the engagement element is braced from two sides of the cam element by the stem, and wherein, by rotation of the cam element about the axis of rotation, the engagement element is guided along the cam curvature such that the stem executes a translational motion whereby the valve element executes a translational motion.

This EGR valve system is provided with a valve assembly, and a plurality of housing adapters. The valve assembly is provided with a housing including a flow passage, a valve seat provided in the flow passage, a valve element provided in the flow passage in such a way as to be capable of seating against the valve seat, a valve shaft on which the valve element is provided, and a driving unit for driving the valve shaft. The housing adapters include assembly holes, inlet flow passages which communicate with the assembly holes, and outlet flow passages. One of the housing adapters is selectively combined with the valve assembly, the housing of the valve assembly is assembled in the assembly hole of the selected housing adapter. In this assembled state, the inlet flow passage communicates with an inlet port, and the outlet flow passage communicates with an outlet port.

This EGR valve system is provided with a valve assembly, and a plurality of housing adapters. The valve assembly is provided with a housing including a flow passage, a valve seat provided in the flow passage, a valve element provided in the flow passage in such a way as to be capable of seating against the valve seat, a valve shaft on which the valve element is provided, and a driving unit for driving the valve shaft. The housing adapters include assembly holes, inlet flow passages which communicate with the assembly holes, and outlet flow passages. One of the housing adapters is selectively combined with the valve assembly, the housing of the valve assembly is assembled in the assembly hole of the selected housing adapter. In this assembled state, the inlet flow passage communicates with an inlet port, and the outlet flow passage communicates with an outlet port.

A computer control network is connected to a multiple-cylinder engine and implements aftertreatment temperature management. Processors are configured to determine an aftertreatment temperature-efficient air to fuel ratio that satisfies the sensed power output request, determine an air to fuel ratio adjustment, select an in-cylinder exhaust gas recirculation technique, select at least one EGR cylinder of the multiple-cylinder engine to implement the in-cylinder exhaust gas recirculation technique, and control the intake valves to open and the exhaust valves to close for the selected at least one EGR cylinder to adjust the oxygen and particulate content of the exhaust gas by applying at least a second compression stroke of the respective reciprocating piston of the at least one EGR cylinder to the exhaust gas to push the exhaust gas through to the intake manifold.

A computer control network is connected to a multiple-cylinder engine and implements aftertreatment temperature management. Processors are configured to determine an aftertreatment temperature-efficient air to fuel ratio that satisfies the sensed power output request, determine an air to fuel ratio adjustment, select an in-cylinder exhaust gas recirculation technique, select at least one EGR cylinder of the multiple-cylinder engine to implement the in-cylinder exhaust gas recirculation technique, and control the intake valves to open and the exhaust valves to close for the selected at least one EGR cylinder to adjust the oxygen and particulate content of the exhaust gas by applying at least a second compression stroke of the respective reciprocating piston of the at least one EGR cylinder to the exhaust gas to push the exhaust gas through to the intake manifold.

A valve includes: a drive; a plunger connected to the drive; and two closing bodies connected to the plunger and movable by the plunger such that the two closing bodies are movable into abutment against respective sealing seats or away from the respective sealing seats. The two closing bodies are arranged fixedly on a sleeve, and the sleeve is slidable onto the plunger and connected fixedly to the plunger.

A controller is used in an internal combustion engine provided with an EGR device recirculating some of exhaust gas flowing in an exhaust passage to an intake passage as EGR gas. The EGR device includes an EGR passage and an EGR valve. The controller includes a CPU that controls opening and closing of the EGR valve. The CPU executes determining process of determining whether the temperature of the internal combustion engine is about the same as the outside air temperature, and an axis displacement eliminating process of opening and closing the EGR valve when it is determined that the temperature of the internal combustion engine is about the same as the outside air temperature in the determining process during the operation stop of the internal combustion engine.

A controller is used in an internal combustion engine provided with an EGR device recirculating some of exhaust gas flowing in an exhaust passage to an intake passage as EGR gas. The EGR device includes an EGR passage and an EGR valve. The controller includes a CPU that controls opening and closing of the EGR valve. The CPU executes determining process of determining whether the temperature of the internal combustion engine is about the same as the outside air temperature, and an axis displacement eliminating process of opening and closing the EGR valve when it is determined that the temperature of the internal combustion engine is about the same as the outside air temperature in the determining process during the operation stop of the internal combustion engine.

In accordance with one aspect of the present disclosure, a turbocharger includes a compressor having a compressor wheel, a turbine provided within a housing, and an exhaust gas recirculation (EGR) flow path. The EGR flow path includes a first fluid connection in the housing and located in proximity to the turbine, a second fluid connection located in proximity to a trailing edge of the compressor wheel, an EGR control valve disposed between the first fluid connection and the second fluid connection, the EGR control valve configured to selectively operate the turbocharger in a low-heat mode having an EGR up to 50% and an operational mode having an EGR rate typically less than 35%.