US20100071642A1 - Exhaust valve device - Google Patents
Exhaust valve device Download PDFInfo
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- US20100071642A1 US20100071642A1 US12/591,009 US59100909A US2010071642A1 US 20100071642 A1 US20100071642 A1 US 20100071642A1 US 59100909 A US59100909 A US 59100909A US 2010071642 A1 US2010071642 A1 US 2010071642A1
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- Prior art keywords
- exhaust valve
- electric actuator
- exhaust
- valve
- valve device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
Definitions
- the present invention relates to an exhaust valve that opens and closes an exhaust passage of a vehicle engine, for example, and an exhaust valve device including an actuator that drives the exhaust valve to open and close.
- An exhaust valve device including a butterfly type exhaust valve that functions as an exhaust brake valve and a warm-up valve and an actuator that drives the exhaust valve is provided in an exhaust pipe of a vehicle such as a motorcycle or an automobile.
- Japanese Patent Application Laid-open No. H11-108207 proposes a device provided with a duty ratio control change-over valve that is subjected to duty ratio control by a controller in order to adjust a valve opening thereof and an ON-OFF change-over valve that switches a warm-up valve from an operative state to an inoperative state by performing a simple ON-OFF operation, wherein a large diameter passage having a large flow passage area is used on the ON-OFF change-over valve side to reduce pressure loss and a small diameter passage is used on the duty ratio control change-over valve side to prevent the controller from hunting, and by connecting the duty ratio control change-over valve and the ON-OFF change-over valve in parallel to an operating pressure chamber, the responsiveness of the warm-up valve to a rapid accelerator depression operation is increased, thereby suppressing the generation of black smoke from an engine.
- Japanese Patent Application Laid-open No. 2002-047949 proposes a constitution for accurately and reliably detecting an opening/closing position of a valve over an entire operating region of a valve main body, in which an angle sensor serving as valve element rotation position detecting means is fixed in a position removed from an end portion of a valve stem via a bracket, rotation transmitting means is formed from an input rubber fixed to an input shaft of the angle sensor and a pin, and a lever connected to an output rod of an actuator and the input shaft of the angle sensor are mechanically connected via the rotation transmitting means.
- a rod for transmitting a position of a valve element that rotates within an exhaust pipe to position detecting means is not connected to the position detecting means at all times, and therefore the position of the valve element cannot be detected over the entire operation region of the valve element.
- valve stem is disposed coaxially with the actuator and the angle sensor, leading to an increase in the size of the device.
- a negative pressure actuator is used, and therefore a negative pressure tank for storing negative pressure, which serves as a power supply, a solenoid valve for controlling the negative pressure that is supplied to the negative pressure actuator, and so on are required, leading to increases in the complexity, size and cost of the system.
- a negative pressure actuator it is difficult to open/close-control the exhaust valve with a high degree of responsiveness.
- an exhaust valve device including: an exhaust valve formed by mounting a valve element, which opens and closes an exhaust passage provided in a valve body, on a valve stem that is inserted into and supported rotatably by the valve body; and an actuator that drives the exhaust valve to open and close, wherein the actuator is constituted by an electric actuator, and opening detecting means is provided to detect an opening of the exhaust valve.
- the electric actuator and the opening detecting means may be disposed coaxially.
- a connecting shaft that connects the electric actuator to the opening detecting means may be disposed parallel to and offset from the valve stem of the exhaust valve, and the connecting shaft and the valve stem may be connected by rotation transmitting means.
- the rotation transmitting means may be constituted by a link mechanism including levers attached respectively to the connecting shaft and the valve stem, and a rod connecting the levers.
- the lever attached to the connecting shaft may be disposed between the electric actuator and the opening detecting means in an axial direction.
- biasing means to bias the exhaust valve in an opening direction at all times may be provided on the connecting shaft.
- the electric actuator and the opening detecting means may be covered by a protective cover.
- a slit or an opening portion to release air may be formed in a ceiling portion of the protective cover.
- At least one of the exhaust valve and the electric actuator may be fixed via thermal insulation packing.
- a magnitude relationship of ⁇ 1 ⁇ 2 ⁇ 3 may be established between an operating angle ⁇ 1 of the exhaust valve, an operating angle ⁇ 2 of the electric actuator, and a detection angle ⁇ 3 of the opening detecting means.
- the actuator to drive the exhaust valve to open and close may be constituted by an electric actuator, and therefore the exhaust value can be open/close-controlled with a high degree of responsiveness and driven to open and close even when the engine is stopped.
- the opening of the exhaust valve can be detected by the opening detecting means.
- the electric actuator and the opening detecting means may be disposed coaxially, and the shaft that connects the electric actuator and the opening detecting means may be disposed parallel to and offset from the valve stem of the exhaust valve, and therefore the entire device can be reduced in size and increased in compactness.
- the electric actuator and opening detecting means are removed from the valve stem (a high-temperature portion), and therefore an air layer exhibiting high heat resistance is formed between the valve stem and the electric actuator and opening detecting means, thereby preventing the electric actuator and opening detecting means from receiving an adverse thermal effect generated by radiation heat from the high-temperature exhaust pipe.
- the operating stability of the electric actuator and opening detecting means can be improved, and a cost reduction can be achieved by using a reasonably priced, lightweight resin material as the material thereof.
- the rotation transmitting means to connect the connecting shaft that connects the electric actuator and the opening detecting means to the valve stem may be constituted by the structurally simple link mechanism, and therefore the flow rate and pressure of exhaust gas flowing through an exhaust passage can be adjusted as desired by transmitting the rotation of the electric actuator to the valve stem via the link mechanism such that the valve stem and a valve element mounted thereon rotate.
- the lever attached to the connecting shaft that connects the electric actuator to the opening detecting means may be disposed between the electric actuator and the opening detecting means in the axial direction, and therefore the electric actuator and opening detecting means can be provided on either side of the connecting shaft after the lever is attached to a central portion thereof, thus improving ease of assembly.
- the exhaust valve may be biased in the opening direction at all times by the biasing means, and therefore the exhaust valve may remain open even when an abnormality occurs in the electric actuator.
- the exhaust valve may be biased in the opening direction at all times by the biasing means, and therefore the exhaust valve may remain open even when an abnormality occurs in the electric actuator.
- a defective situation in which the exhaust passage is closed, thereby choking the flow of exhaust gas, is prevented and a favorable failsafe property is secured.
- backlash from the exhaust valve is absorbed by the biasing means, leading to an improvement in the responsiveness of the exhaust valve.
- the electric actuator and opening detecting means may be covered by the protective cover, and therefore the electric actuator and opening detecting means of the exhaust valve device, which is often disposed on a lower surface of a vehicle, can be protected from flying stones and the like such that damage thereto is prevented.
- the slit or opening portion to release air may be formed in the ceiling portion of the protective cover, and therefore air warmed by the exhaust gas is not held inside the protective cover.
- temperature increases in the electric actuator and opening detecting means covered by the protective cover are suppressed, and a high degree of operational stability is secured therein.
- At least one of the exhaust valve and the electric actuator may be fixed via the thermal insulation packing, and therefore thermal conduction from a high-temperature exhaust pipe to the electric actuator is blocked effectively by the thermal insulation packing. As a result, adverse thermal effects on the electric actuator are eliminated, and the operational stability of the electric actuator is improved.
- the exhaust valve device when a transmission mechanism is constituted by the link mechanism, for example, and a rod of the link mechanism breaks, the exhaust valve enters a fully open state and does not rotate beyond the operating angle ⁇ 1 , whereas the electric actuator rotates beyond the operating angle ⁇ 1 of the exhaust valve.
- the opening detecting means detect a larger rotation angle than ⁇ 1 , the opening detecting means can determine that an abnormality has occurred in the device.
- FIG. 1 is a block diagram showing a system constitution of an exhaust system for a vehicle engine, which includes an exhaust valve device according to an embodiment
- FIG. 2 is a perspective view of the exhaust valve device according to the embodiment
- FIG. 3 is a cutaway front view showing a state in which a protective cover is removed from the exhaust valve device according to the embodiment
- FIG. 4 is a side view showing the exhaust valve device according to the embodiment from an opening detection sensor side;
- FIG. 5 is a perspective view showing the exhaust valve device according to the embodiment from the opening detection sensor side;
- FIG. 6 is a side view showing the exhaust valve device according to the embodiment from an electric actuator side
- FIG. 7 is an exploded perspective view showing a connection structure for connecting the electric actuator and the opening detection sensor of the exhaust valve device according to the embodiment.
- FIG. 8 is a view showing a relationship between a position detection output of the opening detection sensor of the exhaust valve device according to the embodiment and an operating angle of an exhaust valve, an operating angle of the electric actuator, and a detection angle of the opening detection sensor.
- FIG. 1 is a block diagram showing a system constitution of an exhaust system for a vehicle engine, which includes an exhaust valve device according to an embodiment of the present invention.
- An intake manifold 51 is connected to an intake side of a vehicle engine 50 according to this embodiment, and an exhaust manifold 52 is connected to an exhaust side.
- an air cleaner is connected to the intake manifold 51 via a throttle body and a surge tank.
- a catalytic converter 53 , an exhaust valve device 1 , a filter 54 , and a muffler 55 are connected in sequence to an exhaust pipe extending from the exhaust manifold 52 .
- the exhaust valve device 1 is drive-controlled by a control device (ECU) 60 .
- An engine rotation speed detected by an engine rotation sensor 61 , a cooling water temperature detected by a water temperature sensor 62 , an accelerator opening (throttle opening) detected by an accelerator opening sensor 63 , and an engine load detected by a load sensor 64 are input into the control device 60 , and the control device 60 drive-controls the exhaust valve device 1 on the basis of these values.
- intake air fresh air
- fuel is injected into the intake air to form an air-fuel mixture
- the air-fuel mixture is burned in a combustion chamber of each cylinder.
- High-temperature exhaust gas generated upon combustion of the air-fuel mixture is discharged to the exhaust manifold 52 from the engine 50 and purified while flowing through the catalytic converter 53 from the exhaust manifold 52 .
- the exhaust valve device 1 which is drive-controlled by the control device 60 as described above, then adjusts the flow rate and pressure of the exhaust gas, whereupon the exhaust gas is muffled while passing through the muffler 54 . Finally, the exhaust gas is discharged to the atmosphere.
- FIG. 2 is a perspective view of the exhaust valve device.
- FIG. 3 is a cutaway front view showing a state in which a protective cover is removed from the exhaust valve device.
- FIG. 4 is a side view showing the exhaust valve device from an opening detection sensor side.
- FIG. 5 is a perspective view of the same.
- FIG. 6 is a side view showing the exhaust valve device from an electric actuator side.
- FIG. 7 is an exploded perspective view showing a connection structure for connecting the electric actuator and the opening detection sensor of the exhaust valve device.
- the exhaust valve device 1 is constituted by an exhaust valve 2 , an electric actuator 3 that drives the exhaust valve 2 to open and close, and an opening detection sensor 4 that detects an opening of the exhaust valve 2 .
- the electric actuator 3 and the opening detection sensor 4 are covered by a rectangular box-shaped protective cover 5 .
- the protective cover 5 is formed from a metallic material exhibiting high corrosion resistance and high heat resistance, and a plurality of air releasing slits 5 a are formed in a ceiling portion thereof. Note that a simple opening portion may be formed in the ceiling portion of the protective cover 5 instead of the slits 5 a.
- the exhaust valve 2 is formed by mounting a disc-shaped valve element 9 that opens and closes an exhaust passage 8 provided in a circular pipe-shaped valve body (an exhaust pipe in this embodiment) 6 on a valve stem 7 that is inserted into and supported rotatably by the valve body 6 using two hinges 10 .
- a mounting bracket 11 having a U-shaped transverse section is attached to one side portion of the valve body 6 , and the valve body 6 is mounted on a base plate 14 by a plurality of bolts 12 inserted into the mounting bracket 11 and nuts 13 screwed to the bolts 12 .
- thermal insulation packing 15 is interposed between the mounting bracket 11 and the base plate 14 .
- valve stem 7 respective axial ends of the valve stem 7 are supported rotatably by bearings, not shown in the drawings, one end portion thereof (the right end portion in FIG. 3 ) extends horizontally through the base plate 14 , and a lever 16 is attached to this end portion by a nut 17 .
- two engagement projections 16 a , 16 b are formed integrally with the lever 16 so as to project from predetermined angular positions on an outer periphery thereof, and by engaging the engagement projections 16 a , 16 b with a stopper 14 a formed on the base plate 14 , a rotation angle of the valve element 9 (in other words, the opening of the exhaust valve 2 ) is restricted.
- valve element 9 (the exhaust valve 2 ) is in a fully open state, as shown in FIG. 3 , and when the other engagement projection 16 b is engaged with the stopper 14 a , the valve element 9 (the exhaust valve 2 ) is in a fully closed state.
- a return spring 18 serving as biasing means is wound between the base plate 14 of the valve stem 7 and the lever 16 .
- One end of the return spring 18 is latched to the valve stem 7 and the other end is latched to the base plate 14 such that the valve stem 7 and the valve element 9 (exhaust valve 2 ) mounted thereon are constantly biased in an opening direction by the return spring 18 .
- a connecting shaft 19 is disposed rotatably on an upper portion of the base plate 14 so as to be parallel to and upwardly offset from the valve stem 7 of the exhaust valve 2 , and the electric actuator 3 and opening detection sensor 4 are mounted on respective axial ends of the connecting shaft 19 .
- the electric actuator 3 and the opening detection sensor 4 are disposed coaxially and connected by the connecting shaft 19 .
- the electric actuator 3 is constituted by a DC motor and drive-controlled by the control device 60 shown in FIG. 1 .
- the electric actuator 3 is mounted on the upper portion of the base plate 14 by two bolts 20 , and as shown in FIG. 7 , a sector gear 21 is attached to an output shaft of the electric actuator 3 .
- thermal insulation packing may be interposed between the electric actuator 3 and the base plate 14 .
- a mounting flange 22 and a mounting bracket 23 are mounted on a surface of the base plate 14 on which the electric actuator 3 is mounted and an opposite surface thereto by two bolts 24 and nuts 25 screwed to the bolts 24 .
- the mounting flange 22 is a flat plate-shaped member with a circular hole 22 a formed in a central portion thereof.
- the mounting bracket 23 takes a three-dimensional shape in which two leg portions 23 B extend integrally from either end of a flange-shaped mounting portion 23 A and a circular hole 23 a is formed in a central portion of the mounting portion 23 A (see FIG. 7 ).
- the opening detection sensor 4 is mounted on the mounting portion 23 A of the mounting bracket 23 by two bolts 26 , and as described above, the opening detection sensor 4 is connected to the electric actuator 3 by the connecting shaft 19 .
- the opening detection sensor 4 is a variable resistance type sensor which outputs an electric resistance variation generated by rotation of the connecting shaft 19 as an output voltage variation and transmits a corresponding output signal to the control device 60 shown in FIG. 1 .
- a lever 27 is attached to an axial intermediate position of the connecting shaft 19 , or in other words a site of the connecting shaft 19 located between the electric actuator 3 and the opening detection sensor 4 in an axial direction, by left and right nuts 28 , 29 .
- the lever 27 and the lever 16 attached to the end portion of the valve stem 7 are connected by a rod 30 , and together the levers 16 , 27 and the rod 30 constitute a link mechanism 31 that serves as rotation transmitting means for transmitting the rotation of the electric actuator 3 to the valve stem 7 of the exhaust valve 2 .
- another desired transmission mechanism such as a belt transmission mechanism or a gear transmission mechanism may be used as the rotation transmitting means.
- the rotation angle of the electric actuator 3 is detected by the opening detection sensor 4 , and as described above, a corresponding detection signal (voltage signal) is fed back to the control device 60 shown in FIG. 1 .
- the control device 60 determines the opening of the exhaust valve 2 from the detection signal input from the opening detection sensor 4 , and feedback-controls the electric actuator 3 such that the opening thereof equals a set value.
- FIG. 8 shows a relationship between a position detection output (voltage) of the opening detection sensor 4 and an operating angle ⁇ 1 of the exhaust valve 2 , an operating angle ⁇ 2 of the electric actuator 3 , and a detection angle ⁇ 3 of the opening detection sensor 4 .
- a magnitude relationship of ⁇ 1 ⁇ 2 ⁇ 3 is established between ⁇ 1 , ⁇ 2 and ⁇ 3 .
- position detection outputs V 1 , V 2 , V 3 shown on the ordinate of FIG. 8 denote output voltage values corresponding respectively to the operating angle ⁇ 1 of the exhaust valve 2 , the operating angle ⁇ 2 of the electric actuator 3 , and the detection angle ⁇ 3 of the opening detection sensor 4 .
- the opening detection sensor 4 detects a larger rotation angle than ⁇ 1 , the opening detection sensor 4 can determine that an abnormality has occurred in the exhaust valve device 1 .
- the opening detection sensor 4 cannot detect an abnormality such as breakage of the rod 30 of the link mechanism 31 during the feedback control.
- an abnormality can be detected by issuing a maximum operation command unrelated to position control to the electric actuator 3 immediately after an ignition switch of the engine is switched ON or OFF such that the electric actuator 3 rotates at a maximum limit. Note that when feedback control is not performed, an abnormality in the exhaust valve device 1 can be detected at any time without performing the operation described above.
- the actuator for driving the exhaust valve 2 to open and close is constituted by the electric actuator 3 , and therefore the exhaust valve 2 can be open/close-controlled with a high degree of responsiveness and driven to open and close even when the engine is stopped. Moreover, the opening of the exhaust valve 2 can be detected by the opening detection sensor 4 .
- the electric actuator 3 and the opening detection sensor 4 are disposed coaxially while the connecting shaft 19 that connects the two is disposed parallel to and upwardly offset from the valve stem 7 of the exhaust valve 2 , and therefore the entire exhaust valve device 1 can be reduced in size and increased in compactness.
- the electric actuator 3 and opening detection sensor 4 are removed from the valve stem 7 (a high-temperature portion), and therefore an air layer exhibiting high heat resistance is formed between the valve stem 7 and the electric actuator 3 and opening detection sensor 4 , thereby preventing the electric actuator 3 and opening detection sensor 4 from receiving an adverse thermal effect generated by radiation heat from the high-temperature exhaust pipe.
- the operating stability of the electric actuator 3 and opening detection sensor 4 can be improved, and a cost reduction can be achieved by using a reasonably priced, lightweight resin material as the material thereof.
- the rotation transmitting means to transmit the rotation of the electric actuator 3 to the valve stem 7 of the exhaust valve 2 can be constituted by the structurally simple link mechanism 31 , and therefore the flow rate and pressure of the exhaust gas flowing through the exhaust passage 8 can be adjusted as desired by transmitting the rotation of the electric actuator 3 to the valve stem 7 via the link mechanism 31 such that the valve stem 7 and the valve element 9 mounted thereon rotate.
- the lever 27 attached to the connecting shaft 19 that connects the electric actuator 3 to the opening detection sensor 4 is disposed between the electric actuator 3 and the opening detection sensor 4 in the axial direction, and therefore the electric actuator 3 and opening detection sensor 4 can be provided on either side of the connecting shaft 19 after the lever 27 is attached to the central portion thereof, thus improving ease of assembly.
- the exhaust valve 2 is biased in the opening direction at all times by the return spring 18 , and therefore the exhaust valve 2 remains open even when an abnormality occurs in the electric actuator 3 .
- a defective situation in which the exhaust passage 8 is closed, thereby choking the flow of exhaust gas, is prevented and a favorable failsafe property is secured.
- backlash from the exhaust valve 2 is absorbed by the return spring 18 , leading to an improvement in the responsiveness of the exhaust valve 2 .
- the electric actuator 3 and opening detection sensor 4 are covered by the protective cover 5 , and therefore the electric actuator 3 and opening detection sensor 4 of the exhaust valve device 1 , which is often disposed on a lower surface of the vehicle, can be protected from flying stones and the like such that damage thereto is prevented.
- the air releasing slits 5 a are formed in the ceiling portion of the protective cover 5 , and therefore air warmed by the exhaust gas is not held inside the protective cover 5 .
- temperature increases in the electric actuator 3 and opening detection sensor 4 covered by the protective cover 5 are suppressed, and a high degree of operational stability is secured therein.
- the thermal insulation packing 15 is interposed between the mounting bracket 11 for mounting the high-temperature valve body 6 on the base plate 14 and the base plate 14 , and therefore thermal conduction from the high-temperature exhaust pipe to the electric actuator 3 is blocked effectively by the thermal insulation packing 15 .
- adverse thermal effects on the electric actuator 3 are eliminated, and the operational stability of the electric actuator 3 is improved.
- the present invention may be applied to another valve device such as an EGR cooler passage change-over valve device or an EGR introduction amount control valve device.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Characterised By The Charging Evacuation (AREA)
Abstract
An exhaust valve device includes an exhaust valve formed by a valve body, a valve stem and a valve element, which opens and closes an exhaust passage provided in the valve body, mounted on the valve stem that is inserted into and supported rotatably by the valve body; and an actuator that drives the exhaust valve to open and close. The actuator includes an electric actuator, and an opening detection sensor to detect an opening of the exhaust valve. Further, the electric actuator and the opening detection sensor are disposed coaxially, a connecting shaft that connects the two is disposed parallel to and offset from the valve stem of the exhaust valve, and the connecting shaft and valve stem are connected by a link mechanism.
Description
- This application is a continuation, filed under 35 U.S.C. §111(a), of PCT international application No. PCT/JP2008/057723, filed Apr. 22, 2008, which application claims the priority benefit of Japanese patent application No. 2007-122019, filed May 7, 2007, the disclosures of which are incorporated herein by reference.
- 1. Field
- The present invention relates to an exhaust valve that opens and closes an exhaust passage of a vehicle engine, for example, and an exhaust valve device including an actuator that drives the exhaust valve to open and close.
- 2. Description of the Related Art
- An exhaust valve device including a butterfly type exhaust valve that functions as an exhaust brake valve and a warm-up valve and an actuator that drives the exhaust valve is provided in an exhaust pipe of a vehicle such as a motorcycle or an automobile.
- With regard to this exhaust valve device, Japanese Patent Application Laid-open No. H11-108207 proposes a device provided with a duty ratio control change-over valve that is subjected to duty ratio control by a controller in order to adjust a valve opening thereof and an ON-OFF change-over valve that switches a warm-up valve from an operative state to an inoperative state by performing a simple ON-OFF operation, wherein a large diameter passage having a large flow passage area is used on the ON-OFF change-over valve side to reduce pressure loss and a small diameter passage is used on the duty ratio control change-over valve side to prevent the controller from hunting, and by connecting the duty ratio control change-over valve and the ON-OFF change-over valve in parallel to an operating pressure chamber, the responsiveness of the warm-up valve to a rapid accelerator depression operation is increased, thereby suppressing the generation of black smoke from an engine.
- Further, Japanese Patent Application Laid-open No. 2002-047949 proposes a constitution for accurately and reliably detecting an opening/closing position of a valve over an entire operating region of a valve main body, in which an angle sensor serving as valve element rotation position detecting means is fixed in a position removed from an end portion of a valve stem via a bracket, rotation transmitting means is formed from an input rubber fixed to an input shaft of the angle sensor and a pin, and a lever connected to an output rod of an actuator and the input shaft of the angle sensor are mechanically connected via the rotation transmitting means.
- However, in the constitution proposed in Japanese Patent Application Laid-open No. H11-108207, a rod for transmitting a position of a valve element that rotates within an exhaust pipe to position detecting means is not connected to the position detecting means at all times, and therefore the position of the valve element cannot be detected over the entire operation region of the valve element.
- Further, in the constitution proposed in Japanese Patent Application Laid-open No. 2002-047949, the valve stem is disposed coaxially with the actuator and the angle sensor, leading to an increase in the size of the device.
- Furthermore, in the constitutions proposed in Japanese Patent Application Laid-open No. H11-108207 and Japanese Patent Application Laid-open No. 2002-047949, a negative pressure actuator is used, and therefore a negative pressure tank for storing negative pressure, which serves as a power supply, a solenoid valve for controlling the negative pressure that is supplied to the negative pressure actuator, and so on are required, leading to increases in the complexity, size and cost of the system. Moreover, with a negative pressure actuator, it is difficult to open/close-control the exhaust valve with a high degree of responsiveness.
- With the foregoing in view, it is an aspect of the present invention to provide an exhaust valve device with which a reduction in size, an increase in compactness, and an increase in responsiveness can be realized.
- Additional aspects and/or advantages will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the invention.
- The foregoing and/or other aspects of the present invention are achieved by an exhaust valve device including: an exhaust valve formed by mounting a valve element, which opens and closes an exhaust passage provided in a valve body, on a valve stem that is inserted into and supported rotatably by the valve body; and an actuator that drives the exhaust valve to open and close, wherein the actuator is constituted by an electric actuator, and opening detecting means is provided to detect an opening of the exhaust valve.
- In the exhaust valve device, the electric actuator and the opening detecting means may be disposed coaxially.
- In the exhaust valve device, a connecting shaft that connects the electric actuator to the opening detecting means may be disposed parallel to and offset from the valve stem of the exhaust valve, and the connecting shaft and the valve stem may be connected by rotation transmitting means.
- In the exhaust valve device, the rotation transmitting means may be constituted by a link mechanism including levers attached respectively to the connecting shaft and the valve stem, and a rod connecting the levers.
- In the exhaust valve device, the lever attached to the connecting shaft may be disposed between the electric actuator and the opening detecting means in an axial direction.
- In the exhaust valve device, biasing means to bias the exhaust valve in an opening direction at all times may be provided on the connecting shaft.
- In the exhaust valve device, the electric actuator and the opening detecting means may be covered by a protective cover.
- In the exhaust valve device, a slit or an opening portion to release air may be formed in a ceiling portion of the protective cover.
- In the exhaust valve device, at least one of the exhaust valve and the electric actuator may be fixed via thermal insulation packing.
- In the exhaust valve device, a magnitude relationship of θ1<θ2<θ3 may be established between an operating angle θ1 of the exhaust valve, an operating angle θ2 of the electric actuator, and a detection angle θ3 of the opening detecting means.
- In the exhaust valve device, the actuator to drive the exhaust valve to open and close may be constituted by an electric actuator, and therefore the exhaust value can be open/close-controlled with a high degree of responsiveness and driven to open and close even when the engine is stopped. Moreover, the opening of the exhaust valve can be detected by the opening detecting means.
- In the exhaust valve device, the electric actuator and the opening detecting means may be disposed coaxially, and the shaft that connects the electric actuator and the opening detecting means may be disposed parallel to and offset from the valve stem of the exhaust valve, and therefore the entire device can be reduced in size and increased in compactness. Moreover, the electric actuator and opening detecting means are removed from the valve stem (a high-temperature portion), and therefore an air layer exhibiting high heat resistance is formed between the valve stem and the electric actuator and opening detecting means, thereby preventing the electric actuator and opening detecting means from receiving an adverse thermal effect generated by radiation heat from the high-temperature exhaust pipe. As a result, the operating stability of the electric actuator and opening detecting means can be improved, and a cost reduction can be achieved by using a reasonably priced, lightweight resin material as the material thereof.
- In the exhaust valve device, the rotation transmitting means to connect the connecting shaft that connects the electric actuator and the opening detecting means to the valve stem may be constituted by the structurally simple link mechanism, and therefore the flow rate and pressure of exhaust gas flowing through an exhaust passage can be adjusted as desired by transmitting the rotation of the electric actuator to the valve stem via the link mechanism such that the valve stem and a valve element mounted thereon rotate.
- In the exhaust valve device, the lever attached to the connecting shaft that connects the electric actuator to the opening detecting means may be disposed between the electric actuator and the opening detecting means in the axial direction, and therefore the electric actuator and opening detecting means can be provided on either side of the connecting shaft after the lever is attached to a central portion thereof, thus improving ease of assembly.
- In the exhaust valve device, the exhaust valve may be biased in the opening direction at all times by the biasing means, and therefore the exhaust valve may remain open even when an abnormality occurs in the electric actuator. As a result, a defective situation in which the exhaust passage is closed, thereby choking the flow of exhaust gas, is prevented and a favorable failsafe property is secured. Furthermore, backlash from the exhaust valve is absorbed by the biasing means, leading to an improvement in the responsiveness of the exhaust valve.
- In the exhaust valve device, the electric actuator and opening detecting means may be covered by the protective cover, and therefore the electric actuator and opening detecting means of the exhaust valve device, which is often disposed on a lower surface of a vehicle, can be protected from flying stones and the like such that damage thereto is prevented.
- In the exhaust valve device, the slit or opening portion to release air may be formed in the ceiling portion of the protective cover, and therefore air warmed by the exhaust gas is not held inside the protective cover. As a result, temperature increases in the electric actuator and opening detecting means covered by the protective cover are suppressed, and a high degree of operational stability is secured therein.
- In the exhaust valve device, at least one of the exhaust valve and the electric actuator may be fixed via the thermal insulation packing, and therefore thermal conduction from a high-temperature exhaust pipe to the electric actuator is blocked effectively by the thermal insulation packing. As a result, adverse thermal effects on the electric actuator are eliminated, and the operational stability of the electric actuator is improved.
- In the exhaust valve device, when a transmission mechanism is constituted by the link mechanism, for example, and a rod of the link mechanism breaks, the exhaust valve enters a fully open state and does not rotate beyond the operating angle θ1, whereas the electric actuator rotates beyond the operating angle θ1 of the exhaust valve. Hence, when the opening detecting means detect a larger rotation angle than θ1, the opening detecting means can determine that an abnormality has occurred in the device.
- These and/or other aspects and advantages will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
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FIG. 1 is a block diagram showing a system constitution of an exhaust system for a vehicle engine, which includes an exhaust valve device according to an embodiment; -
FIG. 2 is a perspective view of the exhaust valve device according to the embodiment; -
FIG. 3 is a cutaway front view showing a state in which a protective cover is removed from the exhaust valve device according to the embodiment; -
FIG. 4 is a side view showing the exhaust valve device according to the embodiment from an opening detection sensor side; -
FIG. 5 is a perspective view showing the exhaust valve device according to the embodiment from the opening detection sensor side; -
FIG. 6 is a side view showing the exhaust valve device according to the embodiment from an electric actuator side; -
FIG. 7 is an exploded perspective view showing a connection structure for connecting the electric actuator and the opening detection sensor of the exhaust valve device according to the embodiment; and -
FIG. 8 is a view showing a relationship between a position detection output of the opening detection sensor of the exhaust valve device according to the embodiment and an operating angle of an exhaust valve, an operating angle of the electric actuator, and a detection angle of the opening detection sensor. - Reference will now be made in detail to the embodiments, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below to explain the present invention by referring to the figures.
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FIG. 1 is a block diagram showing a system constitution of an exhaust system for a vehicle engine, which includes an exhaust valve device according to an embodiment of the present invention. - An
intake manifold 51 is connected to an intake side of avehicle engine 50 according to this embodiment, and anexhaust manifold 52 is connected to an exhaust side. Although not shown in the drawing, an air cleaner is connected to theintake manifold 51 via a throttle body and a surge tank. - A
catalytic converter 53, anexhaust valve device 1, afilter 54, and a muffler 55 are connected in sequence to an exhaust pipe extending from theexhaust manifold 52. - The
exhaust valve device 1 is drive-controlled by a control device (ECU) 60. An engine rotation speed detected by anengine rotation sensor 61, a cooling water temperature detected by awater temperature sensor 62, an accelerator opening (throttle opening) detected by anaccelerator opening sensor 63, and an engine load detected by aload sensor 64 are input into thecontrol device 60, and thecontrol device 60 drive-controls theexhaust valve device 1 on the basis of these values. - When intake air (fresh air) is supplied to respective cylinders of the
engine 50 from theintake manifold 51, fuel is injected into the intake air to form an air-fuel mixture, and the air-fuel mixture is burned in a combustion chamber of each cylinder. High-temperature exhaust gas generated upon combustion of the air-fuel mixture is discharged to theexhaust manifold 52 from theengine 50 and purified while flowing through thecatalytic converter 53 from theexhaust manifold 52. Theexhaust valve device 1, which is drive-controlled by thecontrol device 60 as described above, then adjusts the flow rate and pressure of the exhaust gas, whereupon the exhaust gas is muffled while passing through themuffler 54. Finally, the exhaust gas is discharged to the atmosphere. - Next, the
exhaust valve device 1 will be described in detail on the basis ofFIGS. 2 to 7 . -
FIG. 2 is a perspective view of the exhaust valve device.FIG. 3 is a cutaway front view showing a state in which a protective cover is removed from the exhaust valve device.FIG. 4 is a side view showing the exhaust valve device from an opening detection sensor side.FIG. 5 is a perspective view of the same.FIG. 6 is a side view showing the exhaust valve device from an electric actuator side.FIG. 7 is an exploded perspective view showing a connection structure for connecting the electric actuator and the opening detection sensor of the exhaust valve device. - As shown in
FIG. 3 , theexhaust valve device 1 is constituted by anexhaust valve 2, anelectric actuator 3 that drives theexhaust valve 2 to open and close, and anopening detection sensor 4 that detects an opening of theexhaust valve 2. As shown inFIG. 2 , theelectric actuator 3 and theopening detection sensor 4 are covered by a rectangular box-shapedprotective cover 5. Here, theprotective cover 5 is formed from a metallic material exhibiting high corrosion resistance and high heat resistance, and a plurality ofair releasing slits 5 a are formed in a ceiling portion thereof. Note that a simple opening portion may be formed in the ceiling portion of theprotective cover 5 instead of theslits 5 a. - As shown in
FIG. 3 , theexhaust valve 2 is formed by mounting a disc-shaped valve element 9 that opens and closes anexhaust passage 8 provided in a circular pipe-shaped valve body (an exhaust pipe in this embodiment) 6 on avalve stem 7 that is inserted into and supported rotatably by thevalve body 6 using two hinges 10. - Here, as shown in
FIG. 3 , a mountingbracket 11 having a U-shaped transverse section is attached to one side portion of thevalve body 6, and thevalve body 6 is mounted on abase plate 14 by a plurality ofbolts 12 inserted into the mountingbracket 11 andnuts 13 screwed to thebolts 12. Note that in this embodiment, thermal insulation packing 15 is interposed between the mountingbracket 11 and thebase plate 14. - Further, respective axial ends of the
valve stem 7 are supported rotatably by bearings, not shown in the drawings, one end portion thereof (the right end portion inFIG. 3 ) extends horizontally through thebase plate 14, and alever 16 is attached to this end portion by anut 17. Here, as shown inFIGS. 4 and 5 , twoengagement projections lever 16 so as to project from predetermined angular positions on an outer periphery thereof, and by engaging theengagement projections stopper 14 a formed on thebase plate 14, a rotation angle of the valve element 9 (in other words, the opening of the exhaust valve 2) is restricted. When one of theengagement projections 16 a is engaged with thestopper 14 a, as shown inFIGS. 4 and 5 , the valve element 9 (the exhaust valve 2) is in a fully open state, as shown inFIG. 3 , and when theother engagement projection 16 b is engaged with thestopper 14 a, the valve element 9 (the exhaust valve 2) is in a fully closed state. - Further, a
return spring 18 serving as biasing means is wound between thebase plate 14 of thevalve stem 7 and thelever 16. One end of thereturn spring 18 is latched to thevalve stem 7 and the other end is latched to thebase plate 14 such that thevalve stem 7 and the valve element 9 (exhaust valve 2) mounted thereon are constantly biased in an opening direction by thereturn spring 18. - Meanwhile, a connecting
shaft 19 is disposed rotatably on an upper portion of thebase plate 14 so as to be parallel to and upwardly offset from thevalve stem 7 of theexhaust valve 2, and theelectric actuator 3 andopening detection sensor 4 are mounted on respective axial ends of the connectingshaft 19. In other words, theelectric actuator 3 and theopening detection sensor 4 are disposed coaxially and connected by the connectingshaft 19. - Here, the
electric actuator 3 is constituted by a DC motor and drive-controlled by thecontrol device 60 shown inFIG. 1 . As shown inFIGS. 3 and 6 , theelectric actuator 3 is mounted on the upper portion of thebase plate 14 by twobolts 20, and as shown inFIG. 7 , asector gear 21 is attached to an output shaft of theelectric actuator 3. Note that thermal insulation packing may be interposed between theelectric actuator 3 and thebase plate 14. - Further, as shown in
FIGS. 3 to 5 andFIG. 7 , a mountingflange 22 and a mountingbracket 23 are mounted on a surface of thebase plate 14 on which theelectric actuator 3 is mounted and an opposite surface thereto by twobolts 24 andnuts 25 screwed to thebolts 24. Here, the mountingflange 22 is a flat plate-shaped member with acircular hole 22 a formed in a central portion thereof. The mountingbracket 23, meanwhile, takes a three-dimensional shape in which twoleg portions 23B extend integrally from either end of a flange-shaped mountingportion 23A and acircular hole 23 a is formed in a central portion of the mountingportion 23A (seeFIG. 7 ). - The
opening detection sensor 4 is mounted on the mountingportion 23A of the mountingbracket 23 by twobolts 26, and as described above, theopening detection sensor 4 is connected to theelectric actuator 3 by the connectingshaft 19. Theopening detection sensor 4 is a variable resistance type sensor which outputs an electric resistance variation generated by rotation of the connectingshaft 19 as an output voltage variation and transmits a corresponding output signal to thecontrol device 60 shown inFIG. 1 . - As shown in
FIG. 7 , alever 27 is attached to an axial intermediate position of the connectingshaft 19, or in other words a site of the connectingshaft 19 located between theelectric actuator 3 and theopening detection sensor 4 in an axial direction, by left andright nuts FIGS. 4 and 5 , thelever 27 and thelever 16 attached to the end portion of thevalve stem 7 are connected by arod 30, and together thelevers rod 30 constitute alink mechanism 31 that serves as rotation transmitting means for transmitting the rotation of theelectric actuator 3 to thevalve stem 7 of theexhaust valve 2. Note that another desired transmission mechanism such as a belt transmission mechanism or a gear transmission mechanism may be used as the rotation transmitting means. - In the
exhaust valve device 1 constituted as described above, when theelectric actuator 3 is driven by the control device shown inFIG. 1 , rotation of theelectric actuator 3 is transmitted to thevalve stem 7 of theexhaust valve 2 from the connectingshaft 19 via thelink mechanism 31, whereupon thevalve stem 7 and the valve element 9 mounted thereon rotate in an identical direction and by an identical angle. By rotating the valve element 9 within the valve body (exhaust pipe) 6 in this manner, the flow rate and pressure of the exhaust gas flowing through theexhaust passage 8 in thevalve body 6 are adjusted. Meanwhile, the rotation angle of theelectric actuator 3, or in other words the opening of theexhaust valve 2, is detected by theopening detection sensor 4, and as described above, a corresponding detection signal (voltage signal) is fed back to thecontrol device 60 shown inFIG. 1 . Thecontrol device 60 then determines the opening of theexhaust valve 2 from the detection signal input from theopening detection sensor 4, and feedback-controls theelectric actuator 3 such that the opening thereof equals a set value. -
FIG. 8 shows a relationship between a position detection output (voltage) of theopening detection sensor 4 and an operating angle θ1 of theexhaust valve 2, an operating angle θ2 of theelectric actuator 3, and a detection angle θ3 of theopening detection sensor 4. As shown inFIG. 8 , a magnitude relationship of θ1<θ2<θ3 is established between θ1, θ2 and θ3. Note that position detection outputs V1, V2, V3 shown on the ordinate ofFIG. 8 denote output voltage values corresponding respectively to the operating angle θ1 of theexhaust valve 2, the operating angle θ2 of theelectric actuator 3, and the detection angle θ3 of theopening detection sensor 4. - Therefore, in cases such as when the
rod 30 of thelink mechanism 31 breaks, for example, theexhaust valve 2 enters the fully open state and does not rotate beyond the operating angle θ1, whereas theelectric actuator 3 remains capable of rotating up to the operating angle θ2, which is larger than the operating angle θ1 of theexhaust valve 2. Hence, when theopening detection sensor 4 detects a larger rotation angle than θ1, theopening detection sensor 4 can determine that an abnormality has occurred in theexhaust valve device 1. - When feedback control is performed, as in this embodiment, the
opening detection sensor 4 cannot detect an abnormality such as breakage of therod 30 of thelink mechanism 31 during the feedback control. However, an abnormality can be detected by issuing a maximum operation command unrelated to position control to theelectric actuator 3 immediately after an ignition switch of the engine is switched ON or OFF such that theelectric actuator 3 rotates at a maximum limit. Note that when feedback control is not performed, an abnormality in theexhaust valve device 1 can be detected at any time without performing the operation described above. - In the embodiment described above, the actuator for driving the
exhaust valve 2 to open and close is constituted by theelectric actuator 3, and therefore theexhaust valve 2 can be open/close-controlled with a high degree of responsiveness and driven to open and close even when the engine is stopped. Moreover, the opening of theexhaust valve 2 can be detected by theopening detection sensor 4. - Further, in this embodiment, the
electric actuator 3 and theopening detection sensor 4 are disposed coaxially while the connectingshaft 19 that connects the two is disposed parallel to and upwardly offset from thevalve stem 7 of theexhaust valve 2, and therefore the entireexhaust valve device 1 can be reduced in size and increased in compactness. Moreover, theelectric actuator 3 andopening detection sensor 4 are removed from the valve stem 7 (a high-temperature portion), and therefore an air layer exhibiting high heat resistance is formed between thevalve stem 7 and theelectric actuator 3 andopening detection sensor 4, thereby preventing theelectric actuator 3 andopening detection sensor 4 from receiving an adverse thermal effect generated by radiation heat from the high-temperature exhaust pipe. As a result, the operating stability of theelectric actuator 3 andopening detection sensor 4 can be improved, and a cost reduction can be achieved by using a reasonably priced, lightweight resin material as the material thereof. - Furthermore, according to this embodiment, the rotation transmitting means to transmit the rotation of the
electric actuator 3 to thevalve stem 7 of theexhaust valve 2 can be constituted by the structurallysimple link mechanism 31, and therefore the flow rate and pressure of the exhaust gas flowing through theexhaust passage 8 can be adjusted as desired by transmitting the rotation of theelectric actuator 3 to thevalve stem 7 via thelink mechanism 31 such that thevalve stem 7 and the valve element 9 mounted thereon rotate. - Further, in this embodiment, the
lever 27 attached to the connectingshaft 19 that connects theelectric actuator 3 to theopening detection sensor 4 is disposed between theelectric actuator 3 and theopening detection sensor 4 in the axial direction, and therefore theelectric actuator 3 andopening detection sensor 4 can be provided on either side of the connectingshaft 19 after thelever 27 is attached to the central portion thereof, thus improving ease of assembly. - Moreover, in this embodiment, the
exhaust valve 2 is biased in the opening direction at all times by thereturn spring 18, and therefore theexhaust valve 2 remains open even when an abnormality occurs in theelectric actuator 3. As a result, a defective situation in which theexhaust passage 8 is closed, thereby choking the flow of exhaust gas, is prevented and a favorable failsafe property is secured. Furthermore, backlash from theexhaust valve 2 is absorbed by thereturn spring 18, leading to an improvement in the responsiveness of theexhaust valve 2. - Further, in this embodiment, the
electric actuator 3 andopening detection sensor 4 are covered by theprotective cover 5, and therefore theelectric actuator 3 andopening detection sensor 4 of theexhaust valve device 1, which is often disposed on a lower surface of the vehicle, can be protected from flying stones and the like such that damage thereto is prevented. Moreover, theair releasing slits 5 a are formed in the ceiling portion of theprotective cover 5, and therefore air warmed by the exhaust gas is not held inside theprotective cover 5. As a result, temperature increases in theelectric actuator 3 andopening detection sensor 4 covered by theprotective cover 5 are suppressed, and a high degree of operational stability is secured therein. - Moreover, in this embodiment, the thermal insulation packing 15 is interposed between the mounting
bracket 11 for mounting the high-temperature valve body 6 on thebase plate 14 and thebase plate 14, and therefore thermal conduction from the high-temperature exhaust pipe to theelectric actuator 3 is blocked effectively by the thermal insulation packing 15. As a result, adverse thermal effects on theelectric actuator 3 are eliminated, and the operational stability of theelectric actuator 3 is improved. - The present invention may be applied to another valve device such as an EGR cooler passage change-over valve device or an EGR introduction amount control valve device.
- Although a few embodiments have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (10)
1. An exhaust valve device comprising:
an exhaust valve formed by a valve body, a valve stem and a valve element, which opens and closes an exhaust passage provided in the valve body, mounted on the valve stem that is inserted into and supported rotatably by the valve body; and
an actuator that drives the exhaust valve to open and close, the actuator comprising an electric actuator, and an opening detection sensor to detect an opening of the exhaust valve.
2. The exhaust valve device according to claim 1 , wherein the electric actuator and the opening detection sensor are disposed coaxially.
3. The exhaust valve device according to claim 2 , further comprising:
a connecting shaft to connect the electric actuator to the opening detection sensor, the connecting shaft being disposed parallel to and offset from the valve stem of the exhaust valve; and
a rotation transmitter to connect the connecting shaft and the valve stem.
4. The exhaust valve device according to claim 3 , wherein the rotation transmitter comprises:
a link mechanism including levers attached respectively to the connecting shaft and the valve stem; and
a rod to connect the levers.
5. The exhaust valve device according to claim 4 , wherein the lever attached to the connecting shaft is disposed between the electric actuator and the opening detection sensor in an axial direction.
6. The exhaust valve device according to claim 3 , further comprising a return spring to bias the exhaust valve in an opening direction at all times provided on the connecting shaft.
7. The exhaust valve device according to claim 1 , further comprising a protective cover to cover the electric actuator and the opening detection sensor.
8. The exhaust valve device according to claim 7 , wherein the protective cover includes a slit or an opening portion to release air that is formed in a ceiling portion of the protective cover.
9. The exhaust valve device according to claim 1 , wherein at least one of the exhaust valve and said electric actuator is fixed via thermal insulation packing.
10. The exhaust valve device according to claim 1 , wherein a magnitude relationship of θ1<θ2<θ3 is established between an operating angle θ1 of said exhaust valve, an operating angle θ2 of said electric actuator, and a detection angle θ3 of said opening detection sensor.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007-122019 | 2007-05-07 | ||
JP2007122019A JP2008274893A (en) | 2007-05-07 | 2007-05-07 | Exhaust valve device |
PCT/JP2008/057723 WO2008139849A1 (en) | 2007-05-07 | 2008-04-22 | Exhaust valve device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2008/057723 Continuation WO2008139849A1 (en) | 2007-05-07 | 2008-04-22 | Exhaust valve device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100071642A1 true US20100071642A1 (en) | 2010-03-25 |
Family
ID=40002067
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/591,009 Abandoned US20100071642A1 (en) | 2007-05-07 | 2009-11-04 | Exhaust valve device |
Country Status (3)
Country | Link |
---|---|
US (1) | US20100071642A1 (en) |
JP (1) | JP2008274893A (en) |
WO (1) | WO2008139849A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10920678B2 (en) * | 2017-04-11 | 2021-02-16 | Faurecia Systemes D'echappement | Valve and exhaust system comprising such a valve |
CN112377313A (en) * | 2020-11-09 | 2021-02-19 | 一汽解放汽车有限公司 | Automatically controlled exhaust management valve and vehicle |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5729218B2 (en) * | 2011-08-26 | 2015-06-03 | 株式会社デンソー | Electronic throttle |
JP7401407B2 (en) | 2020-07-28 | 2023-12-19 | 株式会社ミクニ | engine throttle device |
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US4674464A (en) * | 1984-09-25 | 1987-06-23 | Aisin Seiki Kabushiki Kaisha | Electric exhaust gas recirculation valve |
US4872435A (en) * | 1987-08-26 | 1989-10-10 | Mitsubishi Denki Kabushiki Kaisha | Throttle valve controlling apparatus including relative position limiting means for throttle valves |
US6135415A (en) * | 1998-07-30 | 2000-10-24 | Siemens Canada Limited | Exhaust gas recirculation assembly |
US6422223B2 (en) * | 1999-03-11 | 2002-07-23 | Borgwarner, Inc. | Electromechanically actuated solenoid exhaust gas recirculation valve |
US20040244768A1 (en) * | 2003-04-04 | 2004-12-09 | Takashi Udono | Throttle valve opening control device and layout structure thereof |
US20060124106A1 (en) * | 2003-05-29 | 2006-06-15 | Tsutomu Ikeda | Throttle control devices |
US7428947B2 (en) * | 2004-02-12 | 2008-09-30 | Emcon Technologies Llc | Electrically controlled in-muffler exhaust valve for use during cylinder deactivation |
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JPH01211645A (en) * | 1988-02-18 | 1989-08-24 | Yamaha Motor Co Ltd | Throttle controller of vehicle |
JP2505116Y2 (en) * | 1990-05-18 | 1996-07-24 | 株式会社クボタ | Engine muffler cover |
JP3313376B2 (en) * | 1991-01-31 | 2002-08-12 | スズキ株式会社 | Exhaust control device for two-stroke engine |
JP2002021534A (en) * | 2000-07-04 | 2002-01-23 | Bosch Braking Systems Co Ltd | Exhaust emission control device |
JP4394962B2 (en) * | 2004-01-08 | 2010-01-06 | 本田技研工業株式会社 | Throttle valve opening / closing control device for motorcycle engine |
-
2007
- 2007-05-07 JP JP2007122019A patent/JP2008274893A/en active Pending
-
2008
- 2008-04-22 WO PCT/JP2008/057723 patent/WO2008139849A1/en active Application Filing
-
2009
- 2009-11-04 US US12/591,009 patent/US20100071642A1/en not_active Abandoned
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US4674464A (en) * | 1984-09-25 | 1987-06-23 | Aisin Seiki Kabushiki Kaisha | Electric exhaust gas recirculation valve |
US4872435A (en) * | 1987-08-26 | 1989-10-10 | Mitsubishi Denki Kabushiki Kaisha | Throttle valve controlling apparatus including relative position limiting means for throttle valves |
US6135415A (en) * | 1998-07-30 | 2000-10-24 | Siemens Canada Limited | Exhaust gas recirculation assembly |
US6422223B2 (en) * | 1999-03-11 | 2002-07-23 | Borgwarner, Inc. | Electromechanically actuated solenoid exhaust gas recirculation valve |
US20040244768A1 (en) * | 2003-04-04 | 2004-12-09 | Takashi Udono | Throttle valve opening control device and layout structure thereof |
US20060124106A1 (en) * | 2003-05-29 | 2006-06-15 | Tsutomu Ikeda | Throttle control devices |
US7428947B2 (en) * | 2004-02-12 | 2008-09-30 | Emcon Technologies Llc | Electrically controlled in-muffler exhaust valve for use during cylinder deactivation |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US10920678B2 (en) * | 2017-04-11 | 2021-02-16 | Faurecia Systemes D'echappement | Valve and exhaust system comprising such a valve |
CN112377313A (en) * | 2020-11-09 | 2021-02-19 | 一汽解放汽车有限公司 | Automatically controlled exhaust management valve and vehicle |
Also Published As
Publication number | Publication date |
---|---|
JP2008274893A (en) | 2008-11-13 |
WO2008139849A1 (en) | 2008-11-20 |
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Owner name: MIKUNI CORPORATION,JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KUBOTA, KENJI;REEL/FRAME:023511/0972 Effective date: 20091103 |
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