A motorised fluid metering valve includes an inlet pipe, a discharge pipe and a motor moving a piston that can move linearly between a closed position in which a distal end of the piston sealingly engages with a seat of matching shape, and an open position. The valve is configured to have a flow rate that varies continuously between the closed position and the open position depending on an axial position of the piston. The inlet pipe opens in a periphery of the discharge pipe, with a constant protuberance regardless of the position of the piston, the protuberance not extending radially beyond a barycentre of the discharge pipe. Also, the motor is a rotary electric motor moving the piston in translation.

A motorised fluid metering valve includes an inlet pipe, a discharge pipe and a motor moving a piston that can move linearly between a closed position in which a distal end of the piston sealingly engages with a seat of matching shape, and an open position. The valve is configured to have a flow rate that varies continuously between the closed position and the open position depending on an axial position of the piston. The inlet pipe opens in a periphery of the discharge pipe, with a constant protuberance regardless of the position of the piston, the protuberance not extending radially beyond a barycentre of the discharge pipe. Also, the motor is a rotary electric motor moving the piston in translation.

A valve device increases or decreases a flow rate of EGR gas. The valve device includes a housing, a bypass valve body, an EGR valve body. The housing includes: a first upstream passage into which the EGR gas cooled by an EGR cooler flows; a second upstream passage into which the EGR gas that bypasses the EGR cooler flows; a junction connected to each of a gas-flow downstream of the first upstream passage and a gas-flow downstream of the second upstream passage; and a downstream passage connected to the first upstream passage and the second upstream passage via the junction. The bypass valve body is provided in the second upstream passage. The EGR valve body is provided in the downstream passage.

A valve device increases or decreases a flow rate of EGR gas. The valve device includes a housing, a bypass valve body, an EGR valve body. The housing includes: a first upstream passage into which the EGR gas cooled by an EGR cooler flows; a second upstream passage into which the EGR gas that bypasses the EGR cooler flows; a junction connected to each of a gas-flow downstream of the first upstream passage and a gas-flow downstream of the second upstream passage; and a downstream passage connected to the first upstream passage and the second upstream passage via the junction. The bypass valve body is provided in the second upstream passage. The EGR valve body is provided in the downstream passage.

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.

A coupling device (32) provides a rotary coupling of a pivot shaft (18) of a flap diaphragm (16) of an exhaust gas flap (10) with a drive element (34). The pivot shaft is to be rotated about a pivot axis (A). The coupling device (32) includes a first coupling part (36) with a first coupling area configured for coupling with the pivot shaft (18) and a second coupling part (38) with a second coupling area configured for coupling with the drive element (34). The first coupling part (36) and the second coupling part (38) are in a rotary coupling positive-locking meshing state with one another in the coupled state and are supported on one another in the direction of the pivot axis (A).

A valve actuating device, in particular for an exhaust system, comprises a disk assembly, an actuating arm, and a valve actuator wherein the disk assembly is arranged between the actuating arm and the valve actuator. The disk assembly, at least in part, thermally decouples the actuating arm from the valve actuator and includes at least two identically constructed disks with axial protrusions, which in an axial direction are directly arranged one behind the other and contact each other at the protrusions.

An exhaust valve comprises a tubular body extending along an axis, and defining a flow section perpendicular to the axis, a flap arranged in the tubular body across the flow section, and a shaft rigidly connected to the flap. The shaft is rotatable between a closed orientation in which the flap closes the flow section and an open orientation in which the flap frees the flow section. A proximal, respectively distal, housing is rigidly connected to the tubular body and houses a proximal, respectively distal, bearing ensuring a rotary interface between the tubular body and a proximal, respectively distal, end of the shaft. A rotary actuator is capable of moving the shaft alternately between the closed orientation and the open orientation, and is arranged outside the tubular body and rigidly connected to the proximal end of the shaft. The proximal and/or distal housing is separate from the tubular body.

An actuator is driven by a brushless motor having a rotor with axially extended magnets, permitting axial movement of the rotor while maintaining overlap between the magnets and a stator secured in a fixed position. The rotor is engaged with a fixed structure by a connection such as a ramp or thread that translates rotation into axial movement of the rotor along a rotational axis of the actuator. A valve member coupled to the rotor moves axially between a closed position and a range of positions that regulate fluid flow through a valve. A motor control circuit applies power to the stator coils to rotate the rotor and coupled valve member to a desired axial position and maintain the rotor and valve member at the selected position. The rotor and valve member may be biased toward a rotational position corresponding to a closed position of the valve member.

An actuator is driven by a brushless motor having a rotor with axially extended magnets, permitting axial movement of the rotor while maintaining overlap between the magnets and a stator secured in a fixed position. The rotor is engaged with a fixed structure by a connection such as a ramp or thread that translates rotation into axial movement of the rotor along a rotational axis of the actuator. A valve member coupled to the rotor moves axially between a closed position and a range of positions that regulate fluid flow through a valve. A motor control circuit applies power to the stator coils to rotate the rotor and coupled valve member to a desired axial position and maintain the rotor and valve member at the selected position. The rotor and valve member may be biased toward a rotational position corresponding to a closed position of the valve member.