WO2017179392A1 - バルブボディ、電子制御スロットルボディ、モータ駆動式スロットルボディ、及びバルブ装置 - Google Patents
バルブボディ、電子制御スロットルボディ、モータ駆動式スロットルボディ、及びバルブ装置 Download PDFInfo
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- WO2017179392A1 WO2017179392A1 PCT/JP2017/011905 JP2017011905W WO2017179392A1 WO 2017179392 A1 WO2017179392 A1 WO 2017179392A1 JP 2017011905 W JP2017011905 W JP 2017011905W WO 2017179392 A1 WO2017179392 A1 WO 2017179392A1
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- passage
- throttle body
- motor
- bearing
- throttle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/12—Arrangements for cooling other engine or machine parts
- F01P3/14—Arrangements for cooling other engine or machine parts for cooling intake or exhaust valves
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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
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
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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
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
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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
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1035—Details of the valve housing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/65—Constructional details of EGR valves
- F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/65—Constructional details of EGR valves
- F02M26/72—Housings
- F02M26/73—Housings with means for heating or cooling the EGR valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
- F16C37/007—Cooling of bearings of rolling bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/02—Intercooler
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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
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
- F02D2011/101—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles
- F02D2011/102—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles at least one throttle being moved only by an electric actuator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/91—Valves
Definitions
- the present invention relates to a valve body for adjusting the flow rate of fluid in an internal combustion engine, an electronically controlled throttle body, a motor-driven throttle body, and a valve device.
- the present invention is attached to an intake passage of an internal combustion engine, and by variably controlling the passage cross-sectional area of the intake passage, in a gasoline engine vehicle, an amount of air taken into a cylinder is adjusted, or in a diesel engine It is used to control the pressure in the intake pipe.
- the gasoline engine vehicle is used for both a so-called in-cylinder direct fuel injection type engine in which fuel is directly injected into a cylinder and a so-called port injection type engine in which fuel is injected into an intake pipe.
- this conventional configuration has a problem that the heat transmitted to the bearing of the throttle body cannot be sufficiently transferred to the cooling water, and it becomes necessary to change to a heat-resistant specification bearing.
- the present invention aims to provide a device of this kind that can properly cool the bearing of the throttle body even under conditions where the throttle body receives heat from the hot intake and exhaust gas. It solves at least one of the following.
- an engine cooling water passage is provided adjacent to the bearing peripheral wall of a member for fixing a bearing that pivotally supports the throttle shaft, and guides engine cooling water to the member for fixing the bearing.
- the heat transferred from the bearing (or trying to transfer heat to the bearing) through the member for fixing the bearing is carried away to the outside of the throttle body by the engine cooling water.
- the outer wall is integrally formed on at least a part of the outer wall of the intake passage through which intake air passes, and the engine is formed in a space formed between the inner wall and the outer wall.
- An inlet pipe that guides cooling water and an outlet pipe that discharges engine cooling water heated from this space communicate with each other, and the space can transfer heat around a pair of bearings of a throttle shaft that extends through the intake passage. It is integrally formed.
- the inlet pipe and the outlet pipe are located between the pair of bearings, and the passage cross-sectional area of the space from the position of the inlet pipe and the outlet pipe to the periphery of the bearing is the space in the portion adjacent to the bearing. It is formed larger than the passage cross-sectional area.
- the passage cross-sectional shape of the space from the position of the inlet pipe and the outlet pipe to the periphery of the bearing has a different cross-sectional shape from the passage cross-sectional shape of the space in the vicinity of the bearing.
- the space is formed on the mounting end surface of the member that fixes the bearing as an arc-shaped groove that is released in the direction of air flow.
- the arc-shaped groove is formed as an annular groove that goes around the intake passage.
- the inlet pipe and the outlet pipe are adjacent to each other across a partition wall that partitions the annular groove.
- the inlet pipe is provided on the cover side of the throttle body, and the outlet pipe is located on the non-cover side.
- the space around the bearing on the cover side of the throttle body is formed shallow in the direction of the intake air flow, and as a result, a space for arranging the spring is secured between the space and the outer periphery of the bearing.
- 1 is an exploded perspective view of a motor-driven throttle valve control device used in a gasoline engine vehicle. It is sectional drawing of the motor drive type throttle valve control apparatus used for a gasoline engine vehicle. It is the top view which removed the plate of the motor drive type throttle valve control apparatus used for a gasoline engine vehicle. It is sectional drawing of the cooling water channel
- 1 is an external perspective view of a motor-driven throttle valve control device used in a gasoline engine vehicle. It is sectional drawing of the motor drive type throttle valve control apparatus used for a gasoline engine vehicle.
- the throttle body 5 forms a bore portion 1.
- the throttle body 5 is provided with grooves 5T1 to 5T4 so as to surround the entire circumference of the bore portion 1.
- a cooling water passage is formed by the grooves 5T1 to 5T4 and the plate 30 (see FIGS. 1 and 2).
- the cooling water passage portion is connected to an inlet side cooling water pipe 29A and an outlet side cooling water pipe 29B which are connected to the throttle body 5 by press fitting, and serves as an interface with the counterpart hose.
- FIG. 4 is a cross-sectional view of the cooling water passage portion surrounded by a dotted line in FIG.
- Plate attachment portions 5F1 and 5F2 having a width wider than the groove width are provided at the ends of the groove portions 5T1 to 5T4 of the throttle body 5.
- the plate attachment portions 5F1 and 5F2 serve as pedestals when the plate 30 is attached. After the plate 30 is disposed on the pedestal, the plate 30 is connected to the throttle body 5 by, for example, friction stir welding (FSW) to form a warm water passage portion that ensures airtightness.
- FSW friction stir welding
- a wall 5W is disposed in the groove between the inlet side cooling water pipe 29A and the outlet side cooling water pipe 29B.
- the wall 5W prevents the cooling water from flowing directly from the inlet side cooling water pipe 29A to the outlet side cooling water pipe 29B without passing through the vicinity of the shaft hole.
- the groove 5T4 of the cooling water passage near the bearing 8 is shallower than the other parts in order to secure a space for arranging the return spring 14. Further, the groove portion 5T1 of the cooling water passage portion is deeper than other portions for connection from the cooling water pipe to the cooling water passage.
- the cooling water passage portion 5T3 in the vicinity of the bearing 9 is shallower than the cooling water passage portion 5T2 in order to secure a space for arranging the bearing 9.
- the relationship between the depths of the respective grooves 5T1 to 5T4 is 5T1> 5T2> 5T3> 5T4.
- an aluminum die-cast throttle valve assembly (hereinafter referred to as a throttle body) 5 has an intake passage 1 (hereinafter referred to as a bore portion) and a motor housing 20A for housing the motor 20 together. Is molded.
- a metal rotating shaft (hereinafter referred to as a throttle shaft) 3 is disposed on the throttle body 5 along one diameter line of the bore portion 1. Both ends of the throttle shaft 3 are rotatably supported by needle bearings as bearings 8 and 9. The bearings 8 and 9 are press-fitted and fixed to bearing boss portions 6 and 7 provided on the throttle body 5.
- the bearing 9 is press-fitted into the throttle body 5 after being press-fitted into the throttle shaft 3. Thereafter, the movable amount in the axial direction of the throttle shaft 3 is restricted by being pressed by a cap press-fitted into the throttle body 5.
- the throttle shaft 3 is rotatably supported with respect to the throttle body 5.
- a throttle valve (hereinafter referred to as a throttle valve) 2 composed of a metal disc is inserted into the throttle shaft 3 and inserted into a slit provided in the throttle shaft 3, and fixed to the throttle shaft 3 with a screw 4.
- a throttle valve 2 rotates, and as a result, the cross-sectional area of the intake passage changes and the intake air flow rate to the engine is controlled.
- the motor housing 20A is formed substantially in parallel with the throttle shaft 3, and the motor 20 constituted by a brush type DC motor is inserted into the motor housing 20A, so that the throttle body 5
- the flange portion of the bracket 20B of the motor 20 is fixed to the side wall of the motor 20 with screws 21.
- a wave washer 25 is disposed at the end of the motor 20 to hold the motor 20.
- the openings of the bearing boss portions 6 and 7 are sealed with a bearing 8 and a cap 10 to constitute a shaft seal portion and to be kept airtight. Further, the cap 10 on the bearing boss 7 side prevents the end of the throttle shaft 3 and the bearing 9 from being exposed. This prevents air from leaking from the bearings 8 and 9, or grease for lubricating the bearing from leaking into the outside air or into a sensor chamber to be described later.
- a metal gear 22 having the smallest number of teeth is fixed to the end of the rotating shaft of the motor 20.
- a reduction gear mechanism and a spring mechanism for rotationally driving the throttle shaft 3 are collectively arranged on the side surface of the throttle body where the gear 22 is provided. These mechanisms are covered with a resin cover (hereinafter referred to as a gear cover) 26 fixed to the side surface of the throttle body 5.
- the throttle gear 11 is fixed to the end of the throttle shaft 3 on the gear cover 26 side.
- the throttle gear 11 includes a metal plate 12 and a resin gear portion 13 formed by resin molding on the metal plate 12.
- a cup-shaped recess is provided at the center of the metal plate 12, and a gear molding flange is provided at the open end of the recess.
- a resin material gear portion 13 is molded on the flange portion by resin molding.
- the metal plate 12 has a hole in the center of the recess. A screw groove is formed around the tip of the throttle shaft 3. The tip of the throttle shaft 3 is inserted into the hole of the concave portion of the metal plate 12, and the nut 17 is screwed into the screw portion to fix the metal plate 12 to the throttle shaft 3. Thus, the metal plate 12 and the resin-made gear portion 13 molded therein rotate integrally with the throttle shaft 3.
- a default spring 15 formed of a string spring is sandwiched between the rear surface of the throttle gear 11 and the default lever 16. Further, a return spring 14 formed by a string spring is sandwiched between the back surface of the default lever 16 and the side surface of the throttle body 5.
- a default mechanism that regulates the opening of the throttle valve to a predetermined opening hereinafter referred to as the default opening
- the default opening a predetermined opening
- the initial position of the throttle valve 2 that is, the throttle valve 2 is set to the initial position when the motor 20 is turned off, and the given opening position is the default open position. Degree. Therefore, when the throttle valve 2 is opened from the default opening, the load in the closing direction toward the default opening is returned by the return spring 14, and when the throttle valve 2 is closed from the default opening, the default spring 15 is applied. A load in the opening direction toward the default opening is applied.
- the intermediate gear 23 is engaged.
- the intermediate gear 23 includes a large-diameter gear 23A that meshes with the gear 22 and a small-diameter gear 23B that meshes with the throttle gear 11. Both gears are integrally molded by resin molding.
- These gears 22, 23A, 23B, and 11 constitute a two-stage reduction gear mechanism.
- gear cover 26 made of a resin material.
- a groove into which the seal member 31 is inserted is formed on the periphery of the opening end side of the gear cover 26.
- the rotation angle detection device that is, the throttle sensor formed between the speed reduction gear mechanism configured as described above and the gear cover covering the reduction gear mechanism will be specifically described below.
- the resin holder 19 is fixed to the end of the throttle shaft 3 on the gear cover side by integral molding.
- a conductor 18 formed by pressing is attached to the flat portion at the tip of the resin holder 19 by integral molding. Therefore, when the motor 20 rotates and the throttle valve 2 rotates, the conductor 18 also rotates integrally.
- the TPS substrate 28 is fixed to the gear cover 26 at a position facing the conductor 18.
- the ASIC disposed on the TPS substrate detects the angle of the conductive pair 18 to detect the opening of the throttle valve 2 and supplies it to the ECU as a sensor output.
- Reference numerals 5P1 to 5P3 arranged on the throttle body 5 are positioning walls for the gear cover 26, and the positioning projections of the gear cover 26 are engaged with the three walls so that the TPS substrate 28 and the rotating conductor 18 are disposed. Can be positioned and a signal within the required tolerance can be output.
- the fully open stopper 11A mechanically determines the fully open position of the throttle gear 11, and is constituted by a protrusion integrally formed on the side wall of the throttle body.
- the throttle shaft 3 cannot rotate beyond the fully open position because the notch end portion of the throttle gear 11 abuts on this protrusion.
- the fully closed stopper 11B regulates the fully closed position of the throttle shaft 3.
- the throttle shaft 3 rotates beyond the fully closed position. To stop doing.
- the groove 5T4 forming the cooling water passage is close to the bearing 8 and has a function of cooling the bearing 8 by transferring heat to the throttle body 5. Further, the groove 5T3 is close to the bearing 9, and has a function of cooling the bearing 9 by transferring heat to the throttle body 5. In addition, the groove portion 5T1 to 5T4 surrounds the bore portion 1 in an annular shape, so that the thermal deformation of the bore portion 1 is made uniform, thereby reducing the risk of the throttle valve 2 and the bore portion 1 sticking.
- the throttle body 5 is integrally formed adjacent to the peripheral wall of the bearing boss 6, 7 of the throttle body 5 as a member for fixing the bearings 8, 9 supporting the throttle shaft 3.
- Grooves 5T1, 5T2, 5T3, and 5T4 are arranged.
- the 5T1 to 5T4 and the plate 30 form a cooling water passage.
- an outer wall 52 is integrally formed on at least a part of the outer side of the inner wall 51 of the intake passage 1 (bore 1) through which intake air passes, and a space formed between the inner wall 51 and the outer wall 52 (
- An inlet pipe 29A that guides engine cooling water to the grooves 5T1 to 5T4) and an outlet pipe 29B that discharges engine cooling water heated from the spaces (grooves 5T1 to 5T4) communicate with each other, and spaces (grooves 5T1 to 5T4) Is integrally formed around the pair of bearings 8 and 9 of the throttle shaft 3 extending through the intake passage 1 (bore 1) so as to be able to transfer heat.
- the bearing bosses 6 and 7 and the grooves 5T1, 5T2, 5T3, and 5T4 as the cooling water passage can be integrally formed with the throttle body 5 by aluminum die casting, the manufacturing is simple.
- the inlet pipe 29A and the outlet pipe 29B are located between the pair of bearings 8 and 9, and a space (groove portion) extending from the position of the inlet pipe 29A and the outlet pipe 29B to the periphery of the bearing bosses 6 and 7 is provided.
- 5T1, 5T2) has a passage cross-sectional area larger than the passage cross-sectional area of the space (grooves 5T3, 5T4) in the portion adjacent to the bearings 6, 7.
- the passage cross-sectional shape of the space (grooves 5T1 and 5T2) from the positions of the inlet pipe 29A and the outlet pipe 29B to the periphery of the bearing bosses 6 and 7 is the portion of the space (grooves 5T3 and 5T4) adjacent to the bearing bosses 6 and 7.
- the cross-sectional shape is different from the cross-sectional shape of the passage. Since it is aluminum die-casting, the channel cross-sectional area of the groove part can be formed into an appropriate channel cross-sectional shape according to the part.
- the space is formed on the end surface of the throttle body 5 attached to the intercooler as arc-shaped grooves 5T1, 5T2, 5T3, and 5T4 that are released in the air flow direction. For this reason, die-cutting is easy, and the die-casting die can have a simple shape. In defining the cooling water passage, the passage can be formed simply by closing the open end with a plate.
- the arc-shaped grooves 5T1, 5T2, 5T3, and 5T4 are formed as annular grooves that go around the intake passage. As a result, the flow of the cooling water becomes smooth, there is no stagnation from the entrance to the exit, and the cooling performance is stably obtained.
- the inlet pipe 29A and the outlet pipe 29B are adjacent to each other across the partition wall 5W that partitions the annular groove.
- the inlet pipe 29A is provided on the cover 26 side of the throttle body 5 and the outlet pipe 29A is located on the anti-cover 26 side.
- the motor is put on and the periphery of the bearing boss with the smaller passage cross-sectional area is cooled first, so that the heat collecting effect of the cooling water is high and the temperature or the shape of the passage is recovered. Since the difficultly shaped portion can be cooled, an efficient and uniform cooling performance can be obtained.
- the space around the bearing on the cover side of the throttle body is formed shallow in the direction of the intake air flow, and as a result, a space for arranging the spring is secured between the space and the outer periphery of the bearing.
- the functional parts as the electric throttle body can be accommodated compactly in a narrow space, and despite the provision of a cooling water passage, enlargement of the outer shell can be suppressed and the spring temperature can always be kept at the cooling water temperature.
- the fluctuation of the spring characteristic due to the change in the outside air temperature can be suppressed, and the valve opening characteristic of the throttle valve is improved.
- the motor rating can be reduced, and this also contributes to downsizing.
- the groove dimension (groove depth) in the direction along the intake air flow in the cooling water passages 5T1 to 5T4 is formed so as to surround the periphery of the throttle valve 3 when the throttle valve 3 is in the fully closed position. Therefore, it is possible to suppress the icing that occurs on the inner wall of the intake passage around the throttle valve, and in the unburned gas due to combustion products and tars in the exhaust gas recirculated to the intake passage upstream or downstream of the throttle valve by EGR. It is possible to suppress the unburned product from being stuck to the inner wall of the intake passage due to freezing and solidifying.
- a motor-driven throttle valve control device for a gasoline engine vehicle is described as having a cooling water passage.
- a motor-driven throttle for a diesel engine vehicle is described. It can also be applied to a valve control device.
- the present invention can also be applied to a mechanical engine throttle valve control device.
- the present invention can be applied to a throttle valve control device for EGR gas control and a throttle valve control device for generating negative pressure.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
Claims (21)
- 気体が流れる通路を形成する通路形成体と、
当該通路の断面積を調整するバルブのシャフトを回転可能に軸支する軸受を固定する軸受固定部と、
前記通路を囲むとともに熱交換媒体が流れる流路を形成する流路形成体と、を備えるバルブボディであって、
前記流路は、第1流路と、当該第1流路に繋がりかつ当該第1流路よりも前記軸受固定部に近い第2流路と、により構成され、
前記第2流路の流路断面形状が前記第1流路の流路断面形状と異なるバルブボディ。 - 請求項1に記載のバルブボディであって、
前記第1流路の流路断面積は、前記第2流路の流路断面積より小さいバルブボディ。 - 吸入空気が流れる吸入空気通路を形成する通路形成体と、
前記吸入空気通路を横切って配置されるスロットルシャフトを回転可能に支承するための一対の軸受を固定する一対の軸受固定部と、
前記吸入空気通路を囲むとともに熱交換媒体が流れる流路を形成する流路形成体と、を備える電子制御スロットルボディであって、
前記一対の軸受の一方の軸受固定部を包囲するように設けられかつ前記スロットルシャフトの駆動に関わる電気的要素が収納された空間につながる収納空間を形成する収納部を備え、
前記流路は、前記一対の軸受固定部の内の前記収納空間側に位置する前記一方の軸受固定部に近い第1流路と、前記一対の軸受固定部の内前記収納空間とは反対側に位置する前記一対の軸受固定部の内の他方の軸受固定部に近い第2流路と、により構成されており、
前記第2流路は前記第1流路よりも前記軸受固定部により近い位置に形成されている電子制御スロットルボディ。 - 請求項3に記載の電子制御スロットルボディであって、
前記第1流路の流路断面積は、前記第2流路の流路断面積より小さい電子制御スロットルボディ。 - 流体通路が形成された通路部材と、
前記通路部材に固定された軸受によって回動支持されるシャフトと、
前記シャフトに固定され、当該シャフトの回動によって前記流体通路の通路断面積を制御するバルブと、を備えたバルブ装置において、
前記通路部材には、前記軸受が固定される部分の壁を挟んで前記軸受を冷却する伝熱冷媒が通る冷媒通路が一体に形成されているバルブ装置。 - 請求項5に記載のバルブ装置であって、
前記バルブがEGRバルブで、流体通路が排気ガス通路で、冷却媒体がエンジン冷却水であるバルブ装置。 - 請求項5に記載のバルブ装置であって、
前記バルブがスロットルバルブで、流体通路が吸気通路で、冷却媒体がエンジン冷却水であるバルブ装置。 - 請求項7に記載のバルブ装置であって、
前記シャフトは前記吸気通路を横切って延び、
前記シャフトを回動支持する前記軸受は吸気通路を挟んで対峙する一対の軸受からなり、
前記冷媒通路は前記吸気通路を形成する壁面の外側を取り巻き、前記通路部材に一体に形成された外壁との間に形成される環状の通路として形成されているバルブ装置。 - 請求項8に記載のバルブ装置であって、
前記一対の軸受部間をつなぐ前記冷媒通路部分にエンジン冷却水の導出入部が形成されているバルブ装置。 - 請求項9に記載のバルブ装置であって、
前記エンジン冷却水の導出入部の間に前記環状の通路を分断する仕切り壁が設けられているバルブ装置。 - 請求項8ないし10のいずれかに記載されたバルブ装置であって、
前記環状の通路は空気の流れる方向に向かって解放する弧状の溝として前記通路部材の取付け端面に形成されているバルブ装置。 - モータで駆動されるスロットルバルブの回動によって通路断面積が制御される吸気通路が形成されたスロットルボディであって、
前記スロットルバルブが固定されたスロットルシャフトを軸支する一対の軸受が固定される一対の軸受固定部を備えており、
前記一対の軸受固定部の内の一方の軸受固定部を取り囲むようにして少なくとも前記モータと、前記スロットルバルブを回転方向に付勢するばねを含む前記スロットルバルブ駆動のための機能部品が収納された収納部を備え、
前記機能部品を覆うように前記スロットルボディに取り付けられたカバーを備え、
前記軸受固定部の壁に隣接して前記スロットルボディに一体にエンジンの冷却水を導くエンジン冷却水通路が形成されており、
当該軸受固定部の壁を介して前記軸受と前記エンジン冷却水とが伝熱可能に構成されているモータ駆動式スロットルボディ。 - 請求項12に記載されたモータ駆動式スロットルボディであって、
前記一方の軸受固定部の外周とそこに近接される前記エンジン冷却水通路の壁との間に前記機能部品の内の前記ばねが配置されているモータ駆動式スロットルボディ。 - 請求項12に記載されたモータ駆動式スロットルボディであって、
前記他方の軸受固定部の外周とそこに近接される前記エンジン冷却水通路の壁とは共通の一枚の壁で形成されているモータ駆動式スロットルボディ。 - 請求項12または請求項13に記載のモータ駆動式スロットルボディであって、
前記反収納部側の軸受固定部に近接するエンジン冷却水通路の断面積は前記収納部側の軸受固定部に近接するエンジン冷却水通路の断面積より大きく構成されているモータ駆動式スロットルボディ。 - 請求項12または請求項13に記載のモータ駆動式スロットルボディであって、
前記反収納部側の軸受固定部に近接するエンジン冷却水通路は前記収納部側の軸受固定部に近接するエンジン冷却水通路より軸受固定部により近接して形成されているモータ駆動式スロットルボディ。 - 請求項12ないし請求項16に記載のいずれかのモータ駆動式スロットルボディであって、
前記一対の軸受部間をつなぐ前記冷媒通路部分が前記吸気通路の周囲を取り囲む環状の通路として形成されており、当該環状の通路にエンジン冷却水の導出入部が形成されているモータ駆動式スロットルボディ。 - 請求項17に記載のモータ駆動式スロットルボディであって、
前記エンジン冷却水の導出入部の間に前記環状の通路を分断する仕切り壁が設けられているモータ駆動式スロットルボディ。 - 請求項12ないし請求項16に記載のいずれかのモータ駆動式スロットルボディであって、
前記環状の通路は空気の流れる方向に向かって解放する弧状の溝として前記通路部材の取付け端面に形成されているモータ駆動式スロットルボディ。 - インタークーラーの上流に設置され、モータで駆動されるスロットルバルブの回動によって通路断面積が制御される吸気通路が形成されたスロットルボディであって、
前記スロットルバルブが固定されたスロットルシャフトを軸支する一対の軸受が固定される一対の軸受固定部を備えており、
前記一対の軸受固定部の内の一方の軸受固定部を取り囲むようにして少なくとも前記モータと、前記スロットルバルブを回転方向に付勢するばねを含む前記スロットルバルブ駆動のための機能部品が収納された収納部を備え、
前記機能部品を覆うように前記スロットルボディに取り付けられたカバーを備え、
前記軸受固定部の壁に隣接して前記スロットルボディに一体にエンジンの冷却水を導くエンジン冷却水通路が形成されており、
当該軸受固定部の壁を介して前記軸受と前記エンジン冷却水とが伝熱可能に構成されており、
前記エンジン冷却水通路は前記吸気通路を形成する壁面の外側を取り巻き、前記通路部材に一体に形成された外壁との間に形成される環状の通路として形成されており、
当該エンジン冷却水通路にエンジン冷却水を導く入口パイプとこの空間から加熱されたエンジン冷却水を排出する出口パイプとが繋がっており、
前記入口パイプが前記収納室側の前記軸受固定部に近い側に設けられ、前記出口パイプが反収納室側の前記軸受固定部に近い側に設けられているモータ駆動式スロットルボディ。 - 請求項20に記載のモータ駆動式スロットルボディにおいて、
前記環状の通路は空気の流れる方向に向かって解放する弧状の溝として前記通路部材のインタークーラーと接続される側の取付け端面に形成され、
当該環状の溝の吸気通路に沿った方向の深さは、前記スロットルバルブが全閉開度位置に位置するとき当該スロットルバルブの少なくとも吸気通路上流側端部を含む位置まで形成されているモータ駆動式スロットルボディ。
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