Abstract: A sliding hole is formed so that a screw portion can pass therethrough. Also, a seal member is provided at a portion, through which the screw portion placed in the sliding hole can pass and in which a sliding portion does not slide.

Abstract: A fluid control valve includes a housing defining therein a fluid passage. The fluid control valve further includes a valve member for controlling a fluid flow in the fluid passage by communicating and blocking by the fluid passage. The fluid control valve further includes a protection member being press-inserted into the housing for protecting the housing from heat of the fluid flow in the fluid passage. The housing is formed by die casting of an aluminum material. The protection member and a wall surface, which defines the fluid passage in the housing, define therebetween a thermal insulating layer for restricting thermal transmission of the fluid flow from the protection member toward the housing.

Abstract: The invention relates to a valve device comprising a valve housing (2) with a first and a second flow channel (3a, 3b), and a first and second damper shaft (8a, 8b), which are rotatable relative to the valve housing (2). A first damper (7a) is arranged in the first flow channel (3a) fixed to the first damper shaft (8a) and a second damper (7b) is arranged in the second flow channel (3b) fixed to the second damper shaft (8b). A rotatable regulating member (13) is arranged to control the rotational position of the damper shafts (8a, 8b) via two motion transfer members (20a, 20b), the respective motion transfer member (20a, 20b) being in engagement with a guiding (21) of the regulating member (13) so that the rotational position of the motion transfer member and thereby the rotational position of the associated damper shaft (8a, 8b) is controlled by the rotational position of the regulating member via this guiding (21).

Abstract: An adjustable two-way valve device is described that is embodied as a rotary valve. According to the invention the use of the rotary valve as a two-way valve is achieved by the skillful arrangement of passage openings of a valve plate with respect to control openings of a valve element. Thus it is possible to control mass or mixed flows independently of or dependent on one another with only one valve element. In particular a use in the field of exhaust gas recirculation with a bypass line and an exhaust gas cooler is advantageous, since mixed flows and thus temperatures can be run.

Abstract: A sliding hole is formed so that a screw portion can pass therethrough. Also, a seal member is provided at a portion, through which the screw portion placed in the sliding hole can pass and in which a sliding portion does not slide.

Abstract: An exhaust gas recirculation valve is provided. The exhaust gas recirculation valve has a base, a spring biasing the valve closed, and an actuator including a rotary motor and a linearly displaceable shaft that is coupled to the motor's rotor. The valve includes a valve member and valve seat disposed within a fluid conduit, and the spring is disposed between the actuator and the valve.

Abstract: The present invention is directed to an exhaust gas recirculation valve incorporating a DC motor and a dual poppet valve assembly. A motor is contained inside of the actuator housing. The motor has a rotatable motor shaft with a first gear connected to the end of the motor shaft. A second gear is engageable to the first gear and is configured to rotate in response to the movement of the first gear and the motor shaft. The second gear is also connected to a pin member disposed through the top portion of a shaft member that has two poppet valves disposed on to the shaft. The two ends of the pin member are slidably engageable to either an upwardly or downwardly sloped ramp portion. When the second gear rotates the shaft rotates and moves upward or downward to cause the valve members to move between an open and closed position.

Abstract: In an internal combustion engine comprising a cylinder-head with at least one combustion chamber in the cylinder head and the cylinder head has at least one intake passage and one exhaust passage, and an external exhaust gas recirculation line which branches off from the exhaust passage and opens at least into one of the intake passages, a pivotable flap is arranged between the exhaust gas recirculation passage and the associated intake passage in the region where the exhaust gas recirculation line is connected to the intake passage, the flap opening or closing a connection between the intake passage and the exhaust gas recirculation passage as a function of the pivoting position adjustment of the flap.

Abstract: A fluid metering valve includes a gear rack which is slidable on a valve stem in which a spring counteracts the force of an actuator to maintain a constant load on the gear mechanism to prevent backlash. Corresponding stop mechanisms between the gear and the shaft of a rotary actuator come into engagement with each other near a fully closed position of the fluid metering valve for zero calibration purposes upon power loss to the actuator. A single valve member and a single actuator of the fluid metering valve provides for both a shut-off function and a metering function.

Abstract: A system is disclosed for controlling the current used by an actuator to control actuator position. A control circuit is configured to control the actuator current to a value at or near the minimum current required to sustain the actuator in a desired position in order to maintain the actuator operating temperature below a specified maximum actuator temperature.

Abstract: To protect a drive unit in a fluid valve assembly from impurities over a long term by preventing entrance of such impurities to the drive unit, a seal structure the sealing performance of which is hardly reduced is adopted around a moving part of the fluid valve assembly. The fluid valve assembly is provided with a valve member displaceably arranged in a flow passage through which a fluid is allowed to pass, a drive unit arranged outside the flow passage, a connecting member extending through a bore formed in a wall of the flow passage and connected at its end thereof to the valve member and at its opposite end to the drive unit, and a seal member arranged in gas- or water-tight relations with the wall of the flow passage and the connecting member and made of a flexible material such that the seal member does not interfere with a displacement of the valve member when the valve member is driven by the drive unit.

Abstract: An exhaust gas recirculation system including an intake passage, an exhaust passage joining the intake passage at a junction and in fluid communication with the intake passage, and a closing member having a first position and a second position. When in the first position, the closing member blocks fluid communication between the intake passage and the exhaust passage. When in the second position, the closing member permits fluid communication between the intake passage and the exhaust passage and creates a pressure differential across the junction so that the fluid is either drawn or forced into the intake passage.

Abstract: A modular exhaust gas recirculation assembly includes a flow control body, a closing member movably mounted in the manifold conduit between a first position and a second position, and an actuator assembly coupled to the closing member and driving the closing member between the first position and the second position. The flow control body includes a manifold conduit having a recirculation opening, and an inlet conduit in fluid communication with the manifold conduit. The inlet conduit includes a wall common with the manifold conduit. When in the first position, the closing member closes the recirculation opening and blocks fluid communication between the inlet conduit and the manifold conduit. When in the second position, the closing member opens the recirculation opening and permits fluid communication between the inlet conduit and the manifold conduit and creates a pressure differential across the recirculation opening so that fluid is drawn from the inlet conduit into the manifold conduit.

Abstract: A modular exhaust gas recirculation assembly includes a flow control body, a closing member movably mounted in the manifold conduit between a first position and a second position, and an actuator assembly coupled to the closing member and driving the closing member between the first position and the second position. The flow control body includes a manifold conduit and an inlet conduit in fluid communication with the manifold conduit. The manifold conduit includes manifold conduit a recirculation opening, a first open end having a first cross-sectional shape, and a second open end having a second cross-sectional shape. The closing member includes a boundary defining an operative surface. The boundary has a configuration that is different from the first cross-sectional shape and the second cross-sectional shape. When in the first position, the closing member closes the recirculation opening and blocks fluid communication between the inlet conduit and the manifold conduit.

Abstract: A system of operating an internal combustion engine is disclosed. The engine includes an engine block, an exhaust air system in fluid communication with the engine block, the exhaust air system having an exhaust air conduit, an intake air system in fluid communication with the engine block, the intake air system having an intake air conduit, and an intake air compressing device, an EGR system extending between the exhaust air system and the intake air system upstream of the intake air compressing device, and an ECM in communication with the EGR system. The EGR system includes an EGR injector, the EGR injector includes an EGR injector valve, an intermediate portion of intake air conduit, a throat portion positioned coaxially with the intermediate portion of intake air conduit.

Abstract: A control method of an EGR system of an engine capable of effectively performing an EGR control at a time of rapid acceleration. For this purpose, an intake air flow rate of the engine is obtained, and from a target EGR valve opening degree and a difference in pressure in front of and behind the EGR valve, a virtual EGR gas flow rate is arithmetically operated. A virtual EGR rate is obtained from the intake air flow rate, the fuel flow rate and the virtual EGR gas flow rate, and a difference from or a ratio to a target EGR rate obtained from the engine speed and the fuel flow rate is obtained. A command EGR valve opening degree is obtained from an EGR valve opening degree correction coefficient obtained from the difference or the ratio, and the target EGR valve opening degree, whereby the EGR vale is driven.

Abstract: A modular exhaust gas recirculation assembly includes a flow control body, a closing member movably mounted in the manifold conduit between a first position and a second position, and an actuator assembly coupled to the closing member and driving the closing member between the first position and the second position. The flow control body includes a manifold conduit and an inlet conduit in fluid communication with the manifold conduit. The manifold conduit includes manifold conduit a recirculation opening, a first open end having a first cross-sectional shape, and a second open end having a second cross-sectional shape. The closing member includes a boundary defining an operative surface. The boundary has a configuration that is different from the first cross-sectional shape and the second cross-sectional shape. When in the first position, the closing member closes the recirculation opening and blocks fluid communication between the inlet conduit and the manifold conduit.

Abstract: The detection of a valve-opening starting position of an exhaust gas recirculation (EGR) valve which is disposed in an exhaust gas recirculation system is surely made, and the amount of movement of a motor shaft of an electric motor in a valve-closing direction is restricted. In this manner, the motor shaft is prevented from striking a stopper which restricts the operating range of the electric motor.

Abstract: A valve including a wall, a closure member, a motive force device, and a coupling member. The wall defines a flow passage that is disposed along a longitudinal axis. The closure member is disposed in the flow passage and is rotatable on a first axis that is oblique to the longitudinal axis. The closure member is rotatable between a first position that substantially prevents flow through the flow passage and a second position that generally permits flow through the flow passage. The motive force device rotates the closure member between the first position and the second position. The device includes a rotor that is rotatably supported by a bearing, a stator that is proximate to the rotor, and an overmolded housing that positions the stator with respect to the bearing. The coupling member conveys motive force from the device to rotation of the closure member.

Abstract: Exhaust gas recirculation device for controlling recirculation of exhaust gases to the intake channels of an internal combustion engine. The device has a housing containing a rotary slide valve having a disk-shaped element attached to a rotatable drive shaft. The disk-shaped element controls flow of exhaust gas through openings in a stationary control element. A drive module is mounted on the housing for turning the rotary slide valve.

Abstract: An electrical flow control valve is provided which comprises a retention section for centering a ball retained between one end of a rotor and a surface facing the end. A boss is provided which projects from a motor housing towards a motor holder, is integrated with said motor housing, and retains a bearing in a fixed position. This arrangement allows the greater axial alignment accuracy of the rotor and the stator and greater axial alignment and simplification of the structure of the motor.

Abstract: A modular exhaust gas recirculation assembly includes a flow control body, a closing member movably mounted in the manifold conduit between a first position and a second position, and an actuator assembly coupled to the closing member and driving the closing member between the first position and the second position. The flow control body includes a manifold conduit having a recirculation opening, and an inlet conduit in fluid communication with the manifold conduit. The inlet conduit includes a wall common with the manifold conduit. When in the first position, the closing member closes the recirculation opening and blocks fluid communication between the inlet conduit and the manifold conduit. When in the second position, the closing member opens the recirculation opening and permits fluid communication between the inlet conduit and the manifold conduit and creates a pressure differential across the recirculation opening so that fluid is drawn from the inlet conduit into the manifold conduit.

Abstract: A valve that includes a wall, a closure member, a motive force device, a coupling member, and a sensor. The wall defines a flow passage that is disposed along a longitudinal axis. The closure member is disposed in the flow passage and is rotatable on a first axis that is oblique to the longitudinal axis. The closure member is rotatable between a first position that substantially prevents flow through the flow passage and a second position that generally permits flow through the flow passage. The motive force device rotates the closure member between the first position and the second position. The device includes a rotor that is rotatable with the closure and includes a stator that is disposed proximate to the rotor. The coupling member conveys motive force of the device to rotation of the closure member. And the sensor detects the angular position of the rotor with respect to the stator.

Abstract: An exhaust gas recirculation system including an intake passage, an exhaust passage joining the intake passage at a junction and in fluid communication with the intake passage, and a closing member having a first position and a second position. When in the first position, the closing member blocks fluid communication between the intake passage and the exhaust passage. When in the second position, the closing member permits fluid communication between the intake passage and the exhaust passage and creates a pressure differential across the junction so that the fluid is either drawn or forced into the intake passage.

Abstract: An EGR valve for use in an engine includes a valve body defining an internal passage for the passage of exhaust gas through the valve and a bearing supported in the passage having a bearing surface including an end portion adjacent to the internal passage, with at least one groove formed within the bearing surface sufficient to create an air pocket that resists fluid intrusion into the bearing. A valve member is movable in the valve body for controlling exhaust gas flow through the passage and includes a shaft supported for reciprocating motion along the bearing surface of the bearing. A lubricious insert may also be provided in the bearing surface of the bearing adjacent the end portion of the bearing surface for inhibiting the formation of coking within the bearing.

Abstract: The present invention provides a method and apparatus for controlling an internal combustion engine. The engine includes a variable flow exhaust gas recirculation (EGR) system. The method includes providing a variable geometry turbocharger (VGT) in communication with the EGR system for controlling exhaust gas recirculation. The geometry of the VGT is varied by adjustably controlling a rotary electric actuator (REA) operatively connected to the VGT. A position-adjustable proportional flow EGR valve is adjusted by adjustably controlling a second rotary electric actuator (REA) operatively connected to the position-adjustable proportional flow valve.

Abstract: An exhaust gas recirculation valve device is provided with a motor shaft, a stepping motor main body driving the motor shaft, a valve shaft having a tip functioning as a proximal end which faces one end of the motor shaft and a distal end provided with a valve, a spring pushing the valve shaft in a closing direction, and a spring holder retaining the spring. In the case that the valve is cloned, the tip of the valve shaft and the spring holder are caulked together at a distance between the tip of the valve shaft and the one end of the motor shaft so that a distance between the facing ends of the motor shaft and the valve shaft is equivalent to a difference between a stroke of the motor shaft of the stepping motor main body and a stroke of the valve on opening.

Abstract: An EGR valve control apparatus is provided which is capable of controlling an amount of exhaust gas to be recirculated in a precise and proper manner by using a step motor, as well as improving the durability of an EGR valve. The EGR valve control apparatus adjusts an opening of the EGR valve for opening and closing an exhaust gas recirculation passage connecting between an exhaust passage and an intake passage by means of the step motor.

Abstract: An EGR system using pressure-based feedback control includes an actuator for moving an EGR valve between a closed position and an open position, and a position sensor for detecting the position of the EGR valve and generating a position output signal. A processing circuit receives the position output signal and transmits electrical control signals to energize the actuator and move the EGR valve. A controller includes control logic operative to determine the position for the EGR valve using open loop control during transient behavior and closed loop control for steady state accuracy.

Abstract: A malfunction-detecting-device for an EGR stepping motor is provided wherein a circuit structure is furthermore simple and also more detailed malfunction information can be obtained by detecting the malfunction of the stepping motor during initialization drive of the stepping motor when an engine is just started. In order to determine that excitation coils of the EGR stepping motor have wire breaks, a driving-signal monitoring circuit is provide for monitoring a voltage surge as a monitoring signal generated by turning off a switching element for driving each of the excitation coils so as to cause self induction in the excitation coil. Malfunction detecting means of the EGR stepping motor is also provided for counting the number of monitoring inputs to the driving-signal monitoring circuit during initialization driving of the EGR stepping motor so as to determine the presence of wire breaks in the excitation coils when the number counted is less than the number of times the coils are driven.

Abstract: An apparatus and method for reducing heat transfer between a motive force device and a valve. The apparatus consists of a regulator valve. The valve comprises a wall defining a flow passage disposed along a longitudinal axis. A closure member is disposed in the flow passage for rotation about an axis oblique to the longitudinal axis. The closure member is movable to a first position to prevent flow in the flow passage and the closure member is also movable to a second position to permit flow in the flow passage. A motive force device is disposed along the axis and coupled to the closure member by an insulator member. The motive force device is disposed such that it can rotate the closure member between the first position and the second position about the axis. The valve also comprises a spacing chamber having an inner wall and an outer wall. The inner wall forms a volume that houses the insulator member, the outer wall of the spacing chamber is coupled to the motive force device and the flow passage.

Abstract: An electrical flow control valve is provided which comprises a retention section which has a function of centering a ball which should be retained between one end of a rotor and the opposing face of the end. A boss is provided which projects from a motor housing towards a motor holder, which is integrated with said motor housing and which retains a bearing in a fixed position. This arrangement allows the greater axial alignment accuracy of the rotor and the stator and greater axial alignment and simplification of the structure of the motor.

Abstract: An adjusting unit for actuating a device for variable control of valves of an internal combustion engine for load control of the engine via the inlet stroke function of the valves. The adjusting unit includes a gear unit with a cylindrical worm, on whose circumferential surface a thread is embodied. A displacement element that meshes with the thread of the worm is guided displaceably on the worm, and the displacement element is in communication with an actuating element of the device. A drive unit sets the worm into a rotary motion about its longitudinal axis which drives the displacement element.

Abstract: A flow control valve is provided with a spring which is compressed in the direction of closure of the valve which opens and closes the valve housing, a protruded part which projects towards the valve drive side into the indented part provided on the upper surface of the bracket mounted on the valve drive housing, a protective member projecting from the valve drive housing towards the bracket, and an aperture formed in the bracket so as to communicate the lower face of the bracket with the outside. As a result, a reduction in the adverse effects of heat from the valve housing and in the entry of foreign objects from outside is achieved.

Abstract: Disclosed is a motor-operated flow control valve for internal combustion engines which has a longer useful life and does not cause a drop of torque generated by a motor at the start-up. A rotor shaft (9) is reciprocated with rotating motion of a motor (32), whereupon a valve head (2a) is moved to open and close an orifice for control of a flow rate. Specific frequency of a rotor unit (33) of the motor (32) is set to be higher than the secondary vibration frequency of rotation of a 4-cycle internal combustion engine. The rotor unit (33) comprises an integral magnet (25), a single ball bearing (27) and a resin-made magnet holder (26) for supporting these two members, the magnet, the ball bearing and the magnet holder being formed into an integral structure. The rotor unit is supported such that an outer race (27c) of the ball bearing (27) is held at its one end against an inner peripheral wall of a housing resin (14) and a preload is applied to the other end of the outer race (27c).

Abstract: A device for latching a rotatable shaft. A lever arm is coupled with the shaft and rotates the shaft between a first and second positions when the lever arm rotates between respective first and second positions. A latching device latches the lever arm, in response to receiving an activation signal, when the lever arm is in the first position. The latching device holds the lever arm in the first position. A biasing device is coupled with the lever arm and exerts a biasing force on the lever arm that biases the lever arm towards the second position.

Abstract: When a valve lift control signal is received from a control unit 10, two coils from amongst the coils 18a-18d in a step motor 18 are excited and an aperture of a valve 14 is regulated. When the aperture regulation of the valve 14 is completed and a fixed period of time elapses, the excitation mode of the step motor 18 is switched from 2-phase to 1-phase.

Abstract: An exhaust gas recirculation (EGR) assembly (23) for an internal combustion engine, including an EGR valve (54) having a valve stem (55) reciprocating within a housing (61), between open (FIG. 3) and closed positions. Preferably, the EGR assembly is mounted on the exhaust manifold (15), and the EGR valve can communicate exhaust gas back to the intake manifold (13) in a known manner. The EGR assembly includes an electric motor (41), and a gear train (65) to move the EGR valve (54) in response to changes in an electrical input signal. A plurality of power electronic components (97) are disposed within a controls housing (91), which defines a slot (99) in face-to-face relation to a cooling chamber (81) defined by the housing (61) surrounding the valve stem (55).

Abstract: Disclosed is a motor-operated flow control valve for internal combustion engines which has a longer useful life and does not cause a drop of torque generated by a motor at the start-up. A rotor shaft (9) is reciprocated with rotating motion of a motor (32), whereupon a valve head (2a) is moved to open and close an orifice for control of a flow rate. Specific frequency of a rotor unit (33) of the motor (32) is set to be higher than the secondary vibration frequency of rotation of a 4-cycle internal combustion engine. The rotor unit (33) comprises an integral magnet (25), a single ball bearing (27) and a resin-made magnet holder (26) for supporting these two members, the magnet, the ball bearing and the magnet holder being formed into an integral structure. The rotor unit is supported such that an outer race (27c) of the ball bearing (27) is held at its one end against an inner peripheral wall of a housing resin (14) and a preload is applied to the other end of the outer race (27c).