WO2008001610A1 - Dispositif d'amenée d'air destiné à un moteur - Google Patents

Dispositif d'amenée d'air destiné à un moteur Download PDF

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Publication number
WO2008001610A1
WO2008001610A1 PCT/JP2007/061877 JP2007061877W WO2008001610A1 WO 2008001610 A1 WO2008001610 A1 WO 2008001610A1 JP 2007061877 W JP2007061877 W JP 2007061877W WO 2008001610 A1 WO2008001610 A1 WO 2008001610A1
Authority
WO
WIPO (PCT)
Prior art keywords
passage
engine
intake
groove
auxiliary
Prior art date
Application number
PCT/JP2007/061877
Other languages
English (en)
Japanese (ja)
Inventor
Takehide Nakamura
Yasuo Hosokawa
Hirotaka Fukuta
Naruto Ito
Kenichi Murakami
Eiji Miyazaki
Takashi Yokoo
Yukihiro Inden
Original Assignee
Aisan Kogyo Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2006179481A external-priority patent/JP4920323B2/ja
Priority claimed from JP2006199464A external-priority patent/JP4818840B2/ja
Priority claimed from JP2006208755A external-priority patent/JP2008031964A/ja
Application filed by Aisan Kogyo Kabushiki Kaisha filed Critical Aisan Kogyo Kabushiki Kaisha
Publication of WO2008001610A1 publication Critical patent/WO2008001610A1/fr

Links

Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/04—Engine intake system parameters
    • F02D2200/0406—Intake manifold pressure
    • 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
    • F02D9/105—Details of the valve housing having a throttle position sensor

Definitions

  • the present invention relates to an intake device for an engine.
  • the engine intake system includes a throttle body having a throttle valve that opens and closes the body of the body that forms the intake passage of the engine, and a device block that is provided in the body of the body.
  • a device provided with a device unit formed by modularizing at least one device component (see, for example, Patent Document 1).
  • FIG. 52 is a cross-sectional view showing an air intake device that works well with Conventional Example 1 (Patent Document 1).
  • the intake device 400 of Conventional Example 1 includes a pressure sensor 432 that detects intake pressure in the intake passage as a device component.
  • the pressure sensor 432 is accommodated in a pressure sensor chamber 426 provided in the device block 421 of the device unit 401 attached to the body body 420 of the throttle body 402.
  • the body main body 420 is formed with two sampling passages 413 communicating with the intake passage 440.
  • the pressure receiving region 470 that receives the pressure in the intake passage 440 through the sampling passage 413 of the body main body 420, and the pressure received by the pressure receiving region 470 are pressure sensors 432
  • a pressure detection region 472 to be detected by the above-described structure, and a partition wall 480 that partitions the pressure receiving region 470 and the pressure detection region 472 so as to communicate with each other through a gap are formed.
  • the device block 421 is provided with a crank-shaped through-hole 498 that communicates from the pressure detection region 472 to the pressure sensor 432 disposed on the opposite side, that is, on the opposite mating surface side (upper side in FIG. 52). /!
  • the auxiliary intake air amount control device includes a valve body 312 that opens and closes an auxiliary intake passage 304 that bypasses the throttle valve 303 provided in the intake passage 302 of the engine, And an actuator 311 for operating the valve body 312.
  • the actuator 311 is a temperature sensing device disposed in the engine cooling water passage 306 and incorporates a thermo wax.
  • the temperature sensing device includes a rod 313 that expands and contracts by expansion and contraction of the thermo wax according to the temperature of the engine coolant.
  • the rod 313 and the valve body 312 are connected via a spring 314.
  • a spring 317 is interposed between the valve body 312 and the wall surface of the auxiliary intake passage 304 to urge the valve body 312 in the backward direction.
  • auxiliary intake air amount control device when the engine coolant temperature is low !, the rod 313 of the actuator 311 is in the shortened state and the valve body 312 is in the retracted position. Intake air, that is, auxiliary intake air, bypasses the throttle valve 303 through the auxiliary intake passage 304. Further, when the temperature of the engine cooling water rises, the thermostat in the actuator 311 expands and the rod 313 expands to move the valve body 312 against the urging force of the spring 317. For this reason, the amount of auxiliary intake air supplied to the engine through the auxiliary intake passage 304 is reduced.
  • auxiliary intake air amount control device is described in Patent Document 2, for example.
  • an injector also called a fuel injection valve, a fuel injection device, or the like
  • a body of a throttle body that forms an intake passage of the engine toward the intake passage.
  • Patent Document 1 International Publication Number WO 2005/116429
  • Patent Document 2 Actual Kaihei 1 152041
  • Patent Document 3 Japanese Patent Laid-Open No. 10-220325
  • the pressure detection region 472 is provided between the mating surface and the counter mating surface of the device block 421 as a pressure introduction passage communicating from the sampling passage 413 to the pressure sensor 432.
  • a crank-shaped through hole 498 communicating with the pressure sensor 432 is provided. Therefore, the device block 421 itself has a crank shape
  • the through-hole 498 must be formed, and there is a problem that it is difficult to form or process the through-hole 498. This reduces mass productivity and increases costs, so an improvement is desired.
  • Problem 1 to be solved by the present invention is to provide an engine intake device and a device unit in which a pressure introduction passage can be easily formed.
  • the outflow side passage portion 316 joined to the intake passage 302 is twisted to the rotational axis 303L of the throttle valve 303. It is formed on the straight line 316L that makes the relationship.
  • the outflow side passage portion 316 is opened and closed by the valve body 312 moving forward and backward on the straight line 316L. Therefore, the outflow side passage portion 316 has a passage shape that obstructs the flow of exhaust gas that flows back through the auxiliary intake passage 304 from the engine side (the lower side in FIG. 57).
  • Problem 2 to be solved by the present invention is to provide an auxiliary intake air amount control device and an intake device for an engine capable of inhibiting the backflow of exhaust gas in the auxiliary intake passage.
  • the injector is attached to an injector attachment passage provided in a body of the throttle body.
  • the injector mounting passage is provided separately from the auxiliary intake passage that bypasses the throttle valve in the intake passage of the engine. For this reason, there is a problem in that it is necessary to individually form an injector mounting passage and an auxiliary intake passage in the body of the throttle body, which necessitates an increase in size and cost.
  • Problem 3 to be solved by the present invention is to provide an engine fuel injection device and an intake device that can achieve compactness and low cost. Means for solving the problem
  • the problem 1 can be solved by an engine air intake device and a device unit having the structure described in claims 1 to 22 of the claims.
  • the pressure introduction passage communicating with the sampling passage force pressure detection port is formed by joining the mating surface of the body of the body and the mating surface of the device block. Therefore, the pressure introduction passage can be easily formed by the cooperation of the mating surface of the body body and the mating surface of the device block. As a result, mass productivity can be improved and low cost can be realized.
  • the passage groove provided in the mating surface of the body of the body has a closed cross-section by joining the mating surfaces of the device block. At least a part of the passage can be easily formed.
  • the passage groove provided in the mating surface of the device block has a closed cross-section by joining the mating surface of the body of the body, so that the pressure introduction passage Can be easily formed.
  • the sampling passage groove and the pressure detection passage groove provided on the mating surface of the device block, and the mating surface of the body body are provided.
  • the formed communication channel groove has a closed cross section by joining the mating surface of the body of the body and the mating surface of the device block.
  • the pressure introduction passage is constituted by three or more passage portions having different passage cross-sectional areas and Z or volumes.
  • the throttle passage portion for reducing the passage cross-sectional area is formed in the pressure introduction passage.
  • the pressure introduction passage has a labyrinth structure, so that the pulsation of the detected pressure due to the turbulence of the intake flow by the throttle valve is reduced, and the pressure sensor The detection accuracy of the intake pressure can be improved.
  • the pressure introduction passage is sealed by the seal member interposed between the mating surface of the body of the body and the mating surface of the device block. be able to. Thereby, pressure leakage in the pressure introduction passage can be prevented or reduced, and the detection accuracy of the intake pressure by the pressure sensor can be improved.
  • the seal member can be mounted in the seal member mounting groove formed on the mating surface of the device block or the mating surface of the body of the body.
  • the seal member mounting groove is mounted on the sealing member mounting groove, and the sealing member mounting groove is mounted on the sealing member mounting groove.
  • the sealing member can be easily mounted in the mounting groove for the sealing member.
  • the annular seal portion surrounding the sampling passage groove and the annular seal portion surrounding the pressure detection passage groove are formed on the body of the body. It continues with the common seal part which faces the opening surface of the channel groove for communication. Accordingly, it is possible to improve the installation of the annular seal portions that are continuous with each other of the seal member.
  • the seal member can be easily fitted into the seal member mounting groove so that the seal member can be easily fitted into the seal member mounting groove. Can be installed.
  • the retaining portion provided in the seal member elastically contacts the groove wall surface in the seal member mounting groove, thereby It is possible to prevent the sealing member from being removed.
  • the contact provided on the seal member Since the portion abuts against the groove wall surface of the mounting groove for the seal member, buckling of the seal member due to the joining of the mating surface of the body of the body and the mating surface of the device block can be prevented or reduced. Thereby, the sealing performance of the sealing member can be improved.
  • the terminal of the device component is electrically connected to the terminal portion of the device block. And the terminal of a device component or a terminal support part is positioned by the positioning part provided in the device block.
  • the terminal of the device component or the terminal support portion is easily fitted into the concave groove portion that is the positioning portion formed in the device block. Can be positioned.
  • the cost can be reduced by forming the concave groove portion simultaneously with the molding of the device block.
  • an idle control device that controls the amount of auxiliary intake air that flows through the auxiliary intake passage that bypasses the throttle valve can be provided as a device component other than the pressure sensor.
  • a throttle position sensor for detecting the opening of the throttle valve can be provided as a device component other than the pressure sensor.
  • a temperature sensor for detecting the intake air temperature can be provided as a device component other than the pressure sensor.
  • the device unit of the twenty-second aspect of the present invention it is possible to provide a device unit for use in an intake device for an engine that can easily form a pressure introduction passage.
  • the problem 2 can be solved by an engine auxiliary intake air amount control device and an intake device that are summarized in the configurations described in claims 23 to 32 of the claims. That is, according to the auxiliary intake air amount control apparatus for an engine according to the twenty-third aspect of the invention, the auxiliary intake air amount flowing through the auxiliary intake passage that bypasses the throttle valve is controlled by operating the valve body by the actuator. By the way, the auxiliary intake passage is communicated with the flow control passage portion having a valve seat portion parallel to the rotational axis of the throttle valve and corresponding to the valve body, and the flow control passage portion through the bent portion. In addition, an outflow side passage portion joined to the intake passage is provided.
  • the valve body is operated in the direction of the center line of the flow rate control passage portion. For this reason, it is possible to prevent or reduce the adhesion of foreign substances contained in the exhaust gas to the peripheral side surface of the valve element by avoiding the face-to-face collision of the exhaust gas with the peripheral side surface of the valve element.
  • the valve body fitting portion in which the valve body is housed so as to advance and retreat is provided in the flow rate control passage portion of the auxiliary intake passage.
  • the auxiliary intake air amount control device can be made compact.
  • auxiliary intake air is allowed to flow between the passage wall surface of the flow control passage portion of the auxiliary intake passage and the outer peripheral surface of the valve body fitting portion.
  • An annular circumferential flow passage is formed.
  • the diameter of the valve seat relative to the valve element can be reduced, and the pressure receiving area of the valve element can be reduced.
  • the operating force of the actuator is reduced, and the actuator is smaller.
  • foreign substances contained in the exhaust gas may pass through the wall surface of the auxiliary intake passage, Even if it adheres to the outer surface of the valve body, the foreign matter can be quickly discharged into the intake passage together with the auxiliary intake air by increasing the auxiliary intake air amount.
  • the outflow side passage portion force S is formed in a straight shape, so that the outflow side passage portion is formed by drilling, resin molding, or the like. Can be formed more easily.
  • a foreign substance reservoir that crosses the flow control passage and forms a bag path is formed at the upstream end of the outflow passage. Yes. For this reason, even if the engine side force is exhausted to blow back to the auxiliary intake passage, the backflow stops in the foreign matter reservoir portion even if it flows backward in the outflow passage portion. For this reason, foreign matters contained in the exhaust gas easily accumulate in the foreign matter reservoir, so that the back flow of the exhaust gas upstream from the bent portion of the auxiliary intake passage and the foreign matters contained in the exhaust gas can flow on the outer surface of the valve body and the valve. Reaching the seat portion can be prevented or reduced.
  • the outflow side passage portion force extends upward from the top of the intake passage. For this reason, the foreign matter accumulated in the upstream portion of the outflow side passage portion can be quickly discharged by the dropping action of gravity in addition to the suction action by the bench effect of the intake air flowing through the intake passage.
  • the outflow side passage portion force is formed in an inclined shape in which the downstream side is inclined toward the downstream side of the intake passage as compared with the upstream side.
  • a device unit is formed by modularizing an auxiliary intake air amount control device capable of inhibiting the backflow of exhaust gas in the auxiliary intake passage into a device block. Can be detachably or non-detachably installed on the throttle body.
  • the auxiliary intake passage can be easily formed by the cooperation of the throttle body and the device unit.
  • the subject 3 is an engine having the gist of the configuration described in claims 33 to 44 of the claims. This can be solved by a fuel injection device and an intake device.
  • the injector that injects the fuel into the auxiliary intake passage to the passage forming member that forms the auxiliary intake passage that bypasses the throttle valve in the intake passage of the engine Is provided. Therefore, by using the auxiliary intake passage force S as the injector mounting passage, compactness and low cost can be achieved. In addition, since the air assist effect by the auxiliary intake to the atomized fuel injected from the injector can be obtained, atomization of the atomized fuel can be promoted and the combustion efficiency can be improved.
  • the injector is directed toward the passage portion downstream of the auxiliary intake air amount control device by the auxiliary intake air amount control device in the auxiliary intake passage. It is arranged at the position to spray. For this reason, the atomized fuel injected from the injector can quickly flow into the intake passage.
  • the injector is disposed from the upstream side toward the downstream side of the straight outflow passage portion included in the passage portion on the downstream side of the auxiliary intake passage. It is arranged at the position to spray. For this reason, the atomized fuel injected from the injector can quickly flow into the intake passage.
  • the angle at which the outflow passage portion merges with respect to the intake passage is about 30 °, the atomized fuel injected from the injector is It can quickly flow into the intake passage.
  • the device block of the device unit can be detachably or non-detachably provided on the body body of the throttle body. Therefore, it becomes easy to mount at least one device component on the throttle body.
  • an auxiliary intake passage that bypasses the throttle valve is formed by using at least the body of the body and the device block as a passage forming member, and fuel is injected into the passage forming member toward the auxiliary intake passage.
  • An injector is provided. Therefore, by using the auxiliary intake passage force S as the injector mounting passage, it is possible to achieve compactness and low cost.
  • indigenous hawks also assist the injected atomized fuel Since the air assist effect by intake is obtained, atomization of atomized fuel can be promoted and combustion efficiency can be improved.
  • the auxiliary intake air amount control device that controls the auxiliary intake air amount flowing in the auxiliary intake passage can be provided as at least one device component.
  • the fuel is directed toward the downstream of the auxiliary intake air amount control position by the auxiliary intake air amount control device in the auxiliary intake air passage. It arranges in the position to inject. For this reason, the atomized fuel injected from the injector can quickly flow into the intake passage.
  • the fuel is injected from the upstream side of the straight outflow passage portion to the downstream side of the downstream passage portion of the auxiliary intake passage. It arranges in the position to inject. For this reason, the atomized fuel injected from the injector can quickly flow into the intake passage.
  • the angle at which the outflow passage portion merges with respect to the intake passage is about 30 °, so that the atomized fuel injected by the indicator force is injected into the intake passage. It can flow in quickly.
  • the outflow passage portion joins the top of the intake passage when the intake device is mounted. For this reason, the injector can be disposed on the upper portion of the intake device.
  • the auxiliary intake passage can be easily formed by the cooperation of the single body and the device block.
  • a throttle position sensor that detects the opening of the throttle valve
  • At least one of a temperature sensor for detecting the intake air temperature in the intake passage and a pressure sensor for detecting the intake pressure in the intake passage may be provided.
  • FIG. 1 is a side view showing an intake device for an engine according to a first embodiment.
  • FIG. 2 is a rear view showing the intake device of the engine.
  • FIG. 3 is a sectional view taken along line m-m in FIG.
  • FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.
  • FIG. 5 is a side view showing the device unit mounting side of the throttle body.
  • FIG. 7 is a cross-sectional view taken along line VII-VII in FIG.
  • FIG. 8 is a cross-sectional view showing the relationship between the throttle shaft of the throttle body and the throttle position sensor.
  • FIG. 9 is a cross-sectional view showing the opened state of the ISC valve with respect to the valve seat portion of the throttle body.
  • FIG. 10 is a cross-sectional view showing a closed state of the ISC valve with respect to the valve seat portion of the throttle body.
  • FIG. 11 is an exploded perspective view showing components of the device unit.
  • FIG. 12 is a cross-sectional view showing a peripheral portion of a throttle position sensor of the device unit.
  • FIG. 13 is a cross-sectional view showing the periphery of the connector portion of the device unit.
  • FIG. 14 is a front view showing a device block.
  • FIG. 15 is a rear view showing the device block.
  • FIG. 16 is an exploded sectional view showing a peripheral portion of a throttle position sensor.
  • FIG. 17 is an exploded sectional view showing the periphery of the ISC valve and pressure sensor.
  • FIG. 18 is an exploded cross-sectional view showing the periphery of the temperature sensor.
  • FIG. 19 is a cross-sectional view showing an ISC valve.
  • FIG. 20 is a front view of the ISC valve as viewed from the distal end side of the valve body.
  • FIG. 21 is a side view showing a device cover mounting side of a device block equipped with an ISC valve and a temperature sensor.
  • FIG. 22 is a cross-sectional view showing a state in which the ISC valve is mounted on the device block.
  • FIG. 23 is a cross-sectional view showing a mounted state of the temperature sensor on the device block.
  • FIG. 24 is a side view showing a device cover mounting side of a device block on which a wiring board is mounted.
  • FIG. 25 is a front view showing a wiring board. [26] FIG. 26 is a rear view showing the wiring board.
  • FIG. 27 is a cross-sectional view showing a mounting state of the pressure sensor on the device block.
  • FIG. 29 is a side view showing a throttle body mounting side of a device block equipped with a gasket.
  • FIG. 30 is a surface view showing a gasket.
  • FIG. 31 is an explanatory view showing a pressure passage.
  • FIG. 32 is a cross-sectional view taken along line XXXII-XXXII in FIG.
  • FIG. 33 is a cross-sectional view taken along the arrow line ⁇ in FIG. 31.
  • FIG. 34 is a cross-sectional view taken along the line XXXIV-XXXIV in FIG.
  • FIG. 35 is a perspective view showing the mounting surface of the unit mounting portion of the body of the body and the mounting surface of the device block in a spread state.
  • FIG. 37 is a surface view showing a contact portion of the gasket.
  • FIG. 38 is a cross-sectional view taken along the line XXXVIII-XXXVIII in FIG. 37.
  • FIG. 39 is a cross-sectional view taken along line XXXIX—XXXIX in FIG.
  • FIG. 40 is a surface view showing a retaining portion of the gasket.
  • FIG. 41 is a cross-sectional view taken along the line XXXXI—XXXXI in FIG. 40.
  • FIG. 42 is a cross-sectional view showing a fitting state of the gasket main body portion of the gasket with respect to the gasket fitting groove of the device block.
  • FIG. 43 is a cross-sectional view showing a fitting state of a contact portion of a gasket with a fitting groove for a gasket of a device block.
  • FIG. 44 is a cross-sectional view showing a fitting state of the gasket retaining portion with respect to the gasket fitting groove of the device block.
  • FIG. 45 is a cross-sectional view showing a buckled state of the gasket main body of the gasket.
  • FIG. 46 is an exploded perspective view showing the relationship between the motor fitting portion of the device block and the step motor.
  • FIG. 47 is a rear view showing a motor fitting portion of the device block.
  • FIG. 48 is a rear view showing a state in which the step motor is arranged in the motor fitting portion of the device block.
  • FIG. 49 is an exploded perspective view showing the relationship between the temperature sensor insertion hole of the device block and the thermistor.
  • FIG. 50 is a rear view showing the temperature sensor insertion hole of the device block.
  • FIG. 51 is a rear view showing a state in which the thermistor is arranged in the temperature sensor insertion hole of the device block.
  • FIG. 52 is a cross-sectional view showing an intake device according to Conventional Example 1.
  • FIG. 53 is a sectional view showing a relationship between the throttle valve and the ISC solenoid according to Supplementary Explanation 1 of Embodiment 1.
  • FIG. 54 is a cross-sectional view taken along line LIV-LIV in FIG. 53.
  • FIG. 55 is a cross-sectional view taken along line LV-LV in FIG. 54.
  • FIG. 56 is a cross sectional view taken along line LVI—LVI in FIG. 54.
  • FIG. 57 is a cross-sectional view showing an auxiliary intake air amount control apparatus according to Conventional Example 2.
  • FIG. 58 is a side view showing an engine intake apparatus according to Embodiment 2.
  • FIG. 59 is a side sectional view showing an intake device for an engine.
  • FIG. 60 is a side view showing the device unit mounting side of the throttle body.
  • FIG. 61 is a plan view showing an intake device for an engine.
  • FIG. 62 is a cross-sectional view showing a state where the injector is attached to the body of the body.
  • FIG. 63 is a side view showing the injector.
  • FIG. 64 is a cross-sectional view showing an injector mounting portion of the body of the body.
  • FIG. 65 is a cross-sectional view showing a first modification.
  • FIG. 66 is a cross-sectional view showing a second modification.
  • Communication groove (passage groove for communication)
  • ISC valve internal combustion system valve
  • Throttle position sensor device parts
  • Second communication groove (passage groove for pressure detection)
  • Embodiment 1 of the present invention will be described with reference to the drawings.
  • This example is a motorcycle, moped An engine intake device used for a two-wheeled vehicle such as a bicycle will be described.
  • the side to which the air cleaner (not shown) is connected (V, right side in Fig. 1) is the front side, and the intake hold (not shown) is attached.
  • the connected side (left side in Fig. 1) will be described as the rear side.
  • the vertical direction of the intake device 1 of the engine is the same as the vertical direction when mounted on a motorcycle.
  • the engine intake device 1 includes a throttle body 2 and a device unit 3 that is detachably provided on one side of the throttle body 2 (right side in FIG. 2). (See Figure 1). For convenience of description, explain the throttle Bode one 2, illustrating the device unit 3 subsequently.
  • the throttle body 2 is provided with a body 1 that is the main body.
  • the body body 5 is made of, for example, resin and has a substantially hollow cylindrical bore wall portion 6 penetrating in the front-rear direction (the front and back direction in FIG. 3).
  • the hollow part in the bore wall part 6 becomes the bore 7.
  • An air cleaner (not shown) is connected to the front end (the left end in FIG. 4) of the bore wall 6 and an intake bearer is connected to the rear end (the right end in FIG. 4) of the bore wall 6.
  • a hold (not shown) is connected. Therefore, the intake air flowing from the air cleaner flows through the bore 7 to the intake bear hold.
  • the bore 7 corresponds to an “intake passage” in the present specification.
  • an engine may be directly connected to the rear end side of the bore wall 6 instead of the intake bear-hold.
  • the bore wall 6 is provided with a throttle shaft 9 that crosses the bore 7 in the radial direction, that is, in the left-right direction.
  • the throttle shaft 9 is made of metal, for example. Both end portions of the throttle shaft 9 are rotatably supported in a pair of left and right bearing boss portions 10 and 11 formed integrally with the bore wall portion 6.
  • a rubber seal material 12 is interposed between the throttle shaft 9 and the bearing boss portions 10 and 11, respectively. Each seal material 12 inertially seals between the throttle shaft 9 and each bearing boss 10, 11.
  • a substantially disc-shaped butterfly throttle valve 14 that opens and closes the bore 7 is fastened on the throttle shaft 9 by a screw 15.
  • the throttle valve 14 rotates together with the throttle shaft 9, the amount of intake air flowing through the bore 7 is controlled.
  • the throttle valve 14 is closed as shown by the solid line 14 in FIG. From the closed state, it is rotated in the clockwise direction in FIG. 4 (refer to the arrow “0 (o1)” direction in FIG. 4) and opened (see the two-dot chain line 14 in FIG. 4).
  • the throttle valve 14 in the open state is closed (see the solid line 14 in FIG. 4) by rotating counterclockwise in FIG. 4 (see the arrow “S” direction in FIG. 4).
  • a throttle lever 17 is integrated with the right end portion (the right end portion in FIG. 3) of the throttle shaft 9 by insert molding.
  • a return spring 18 having a coil spring force is interposed between the throttle lever 17 and the bearing boss portion 11 facing the throttle lever 17. The return spring 18 always urges the throttle lever 17, the throttle shaft 9, and the throttle valve 14 in the closing direction.
  • the throttle lever 17 is connected with an accelerator wire connected to a throttle operating device (not shown).
  • the throttle shaft 9 Prior to fastening of the throttle valve 14, the throttle shaft 9 is passed through the bearing bosses 10, 11 of the bore wall portion 6 from the right to the left. After a washer 19 and a spacer 20 are fitted to the insertion end of the throttle shaft 9, a snap ring 21 is attached to an annular groove (not shown) formed in the end. The washer 19 is locked in an opening recess 22 that is formed in the opening side end of the bearing boss 10 and has an increased inner diameter. Thereby, the throttle shaft 9 is prevented from coming off. Further, the insertion end (left end portion in FIG. 3) of the throttle shaft 9 protrudes from the opening end face of the bearing boss portion 10. A sensor rotor connecting portion 24 having a D-shaped cross section is formed at the insertion end (see FIG. 5). Further, the sensor rotor connecting portion 24 can be connected to a sensor rotor 143 of a throttle position sensor 52 provided in the device unit 3 described later.
  • the bore wall portion 6 is formed with a flange-like unit mounting portion 26 continuous with the outer peripheral portion of the left bearing boss portion 10.
  • the unit mounting portion 26 is formed with a mounting surface 26a that forms the same plane as the opening end surface of the left bearing boss portion 10 and also has an outer end surface force that is orthogonal to the axis 9L of the throttle shaft 9 (see FIG. 2).
  • a device unit 3 to be described later can be attached to and detached from the mounting surface 26a.
  • the axis 9L of the throttle shaft 9 corresponds to the rotation axis of the throttle valve 14.
  • the mounting surface 26a of the unit mounting portion 26 is referred to as “the mating surface facing the device block” or “the alignment of the body of the body” in this specification. Corresponds to “growth surface”.
  • the unit mounting portion 26 is formed with a binos inlet hole 28 and a bypass outlet hole 30.
  • the bypass inlet hole 28 is formed by a straight circular hole that penetrates the bore wall portion 6 and the unit mounting portion 26 in the left-right direction (the front and back direction in FIG. 4).
  • the opening end on the bore side of the bypass inlet hole 28 is opened on the passage wall surface of the bore 7 at a position upstream of the throttle valve 14 in the fully closed state and closer to the top. Further, the opening end of the bypass inlet hole 28 on the side opposite to the bore is opened in the mounting surface 26a of the unit mounting portion 26 (see FIG. 5).
  • bypass outlet hole 30 is represented in FIG. 6 and FIG. 7 in addition to FIG.
  • the bypass outlet hole 30 includes a vertical hole portion 31 extending in the vertical direction at the upper portion of the unit mounting portion 26, and the upper end force of the vertical hole portion on the left side (right side in FIG. 7). It is formed in an inverted L shape by a horizontal hole portion 32 extending horizontally. As shown in FIG. 4, the opening end on the bore side, ie, the downstream end, of the longitudinal hole portion 31 is opened to the upper side portion, that is, the ceiling portion of the passage wall surface of the bore 7 on the downstream side of the throttle valve 14 in the fully closed state. And joined to its bore 7. The vertical hole 31 extends upward (upward in FIG. 7) from the top of the mounting.
  • the vertical hole 31 has a downstream side (lower side in Fig. 4) inclined toward the downstream side of the bore 7 (right side in Fig. 4) as compared to the upstream side (upper side in Fig. 4). It is formed in an inclined shape by a bottomed straight circular hole extending along a straight line 31L. Further, the lateral hole 32 is also formed in a straight shape.
  • the connecting portion between the vertical hole portion 31 and the horizontal hole portion 32 is an elbow-shaped bent portion 240 (see FIGS. 4 and 7).
  • the vertical hole portion 31 corresponds to the “outflow side passage portion” in the present specification.
  • the horizontal hole portion 32 is a straight step extending along a straight line 32L perpendicular to the straight line 31L of the vertical hole portion 31 near the upper end portion of the vertical hole portion 31. It is formed by an attached circular hole.
  • the center line of the horizontal hole portion 32 that is, the straight line 32L is parallel to the rotation axis (9L) of the throttle valve 14.
  • the horizontal hole portion 32 includes a large-diameter hole portion 32a that opens to the mounting surface 26a of the unit mounting portion 26, and a small-diameter hole portion 32b that communicates the large-diameter side hole portion 32a and the vertical hole portion 31. And have.
  • the edge portion on the side of the hole 32a is a valve seat portion 33 corresponding to a valve body 110 of an idle speed control valve (hereinafter referred to as “IS C solenoid”) 51 described later.
  • the lateral hole portion 32 corresponds to a “flow rate control passage portion” in this specification.
  • the upper end portion, that is, the upstream end portion of the vertical hole portion 31 is a foreign matter reservoir portion 35 that extends upward from the small-diameter hole portion 32b.
  • the foreign material reservoir 35 crosses the hole 32b on the small diameter side of the horizontal hole 32 and forms a bag path.
  • foreign matter such as deposits contained in the exhaust gas blown back into the vertical hole 31 can also be received and stored in the foreign substance reservoir 35 formed at the end of the vertical hole 31.
  • backflow to the upstream side of the lateral hole portion 32 can be prevented or reduced. This point will be described in detail later.
  • the open end portion of the large-diameter side hole portion 32a in the horizontal hole portion 32 corresponds to the “passage opening portion” in this specification.
  • valve body fitting portion 74 of a device block 50 to be described later is fitted into the large diameter side hole portion 32a of the lateral hole portion 32.
  • the large-diameter side hole 32a in the lateral hole 32 is referred to as a “valve fitting hole”.
  • bypass inlet hole 28 and the bypass outlet hole 30 are connected to the mounting surface 26a of the unit mounting portion 26.
  • a bypass passage groove 37 is formed (see Fig. 6).
  • both pressure inlets 38 are opened at a position that avoids the influence of the vortex flow of the intake flow generated near the outer peripheral portion on the downstream side of the throttle valve 14 when the valve is opened.
  • This “position avoiding the influence of the vortex flow of the intake flow generated near the outer peripheral portion on the downstream side of the throttle valve” means, for example, downstream of the throttle valve 14 in the fully open state (see the two-dot chain line 14 in FIG. 4). This corresponds to the peripheral portion on the downstream side of the side end portion 14a.
  • both pressure inlets 38 are opened at a position upstream of the flow of the intake air (auxiliary intake air) flowing out from the vertical hole portion 31 of the bypass outlet hole 30 and avoiding the influence of the intake air. ing.
  • the pressure inlets 38 are positions avoiding the influence of the vortex flow of the intake flow generated near the outer peripheral portion on the downstream side of the throttle valve 14, and from the vertical hole portion 31 of the bypass outlet hole 30.
  • the pressure inlet 38 reference numeral (A, (A)
  • the pressure inlet 38 is located on the ground side (for example, the lower side in FIG. 4) when the throttle body 2 is mounted on the motorcycle.
  • the unit mounting portion 26 has a straight hole having an oblong shape with a vertically long cross section that opens to the mounting surface 26a on the left side of the both pressure inlets 38 (the back side in FIG. 4).
  • a shaped sampling passage 39 is formed (see FIG. 5).
  • An upper pressure inlet 38 communicates with the upper end of the sampling passage 39, and a lower pressure inlet 38 communicates with the lower end thereof.
  • the attachment surface 26a of the unit attachment portion 26 is formed with an elongated communication groove 40 that extends from near the upper side of the sampling passage 39 to the upstream side (rightward in FIG. 5). Yes.
  • the communication groove 40 corresponds to a “passage groove” and a “communication passage groove” in the present specification. Further, the pressure inlets 38, the sampling passage 39, and the communication groove 40 constitute a part of a pressure introduction passage 187 that is applied to a pressure sensor 54 described later.
  • the bore wall 6 and the unit mounting portion 26 also have a straight circular hole that penetrates in the left-right direction (the front and back direction in FIG. 4).
  • Hole 42 is provided.
  • the intake air temperature detection hole 42 is opened on the passage wall surface of the bore 7 on the upstream side of the throttle valve 14 in the fully closed state and near the lower portion, that is, near the lower side of the bypass inlet hole 28! . Further, the opening end of the bypass inlet hole 28 on the side opposite to the bore is opened to the mounting surface 26a of the unit mounting portion 26 (see FIG. 5).
  • an appropriate number of fastening bosses (a total of three fastening bosses are shown, one on the upper side and two on the lower side on the lower side) on the outer peripheral portion of the unit mounting portion 26.
  • Part 44 is formed.
  • a screw hole 44 a is formed in the fastening boss portion 44.
  • a fastening bolt 45 (see FIG. 2) for fastening a device block 50 of the device boot 3 described later can be fastened to the screw hole 44a.
  • the device unit 3 that is detachably provided on the throttle body 2 will be described.
  • the device unit 3 has an ISC valve 51, a throttle position sensor 52, a temperature sensor 53, and a device part (specifically, device parts related to the engine) as a device component with respect to the device block 50.
  • the pressure sensor 54 is modularized together with the wiring board 55.
  • the device unit 3 is attached to the throttle body 2 (lower side in FIG. 11) as the front side, and the device cover 60 side (upper side in FIG. 11) to be described later is the rear side. This will be described as a side.
  • the device block 50 includes an ISC valve 51, a throttle position sensor 52, a temperature sensor 53, and a pressure sensor 54 as a plurality of device parts.
  • ISC valve 51 an ISC valve 51
  • throttle position sensor 52 a throttle position sensor 52
  • temperature sensor 53 a temperature sensor 53
  • pressure sensor 54 a pressure sensor 54
  • the device block 50 is made of, for example, a resin and is formed in a substantially block shape.
  • a mounting surface 50 a is formed on the front side of the device block 50.
  • the mounting surface 50a is formed so as to be able to be joined in surface contact with the mounting surface 26a (see FIG. 5) of the unit mounting portion 26.
  • the mounting surface 5 Oa of the device block 50 corresponds to “a mating surface facing the body of the body” and “a mating surface of the device block” in this specification.
  • a peripheral wall 57 along the outer periphery of the device block 50 is formed on the rear side of the device block 50.
  • a housing recess 58 is formed in the peripheral wall 57 of the device block 50.
  • the accommodating recess 58 accommodates an ISC valve 51, a throttle position sensor 52, a temperature sensor 53, a pressure sensor 54, a wiring board 55, and the like, which will be described later.
  • the housing recess 58 is closed by welding the device cover 60 (described later) to the opening end of the peripheral wall portion 57.
  • the unit mounting portion 26 As shown in FIG. 11, on the outer periphery of the device block 50, the unit mounting portion 26 A mounting boss portion 62 corresponding to each of the fastening boss portions 44 (see FIG. 5) is formed. Each mounting boss 62 is formed with a bolt insertion hole 62a (see FIGS. 14 and 15). The bolt insertion hole 62a is formed to allow the fastening bolt 45 (see FIG. 2) to pass therethrough. By fastening the fastening bolt 45 to the screw hole 44a of each fastening boss 44 through the bolt insertion hole 62a of each mounting boss 62, the device block 50 can be detachably provided in the throttle body 2. (See Fig. 1 to Fig. 3).
  • the device block 50 is formed with a hollow cylindrical rotor fitting hole 64 penetrating in the front-rear direction (vertical direction in FIG. 16).
  • An annularly projecting flange portion 65 is formed on the inner peripheral surface of the central portion of the rotor fitting hole portion 64.
  • a sensor rotor 143 of a throttle position sensor 52 which will be described later, is formed so that it can be fitted from behind (upper in FIG. 16).
  • a connecting tube portion 66 having a cylindrical shape surrounding the rotor fitting hole 64 is projected from the mounting surface 50 a of the device block 50.
  • the connecting tube portion 66 is formed so as to be able to fit in the opening recess 22 of the left bearing boss portion 10 on the mounting surface 26a of the unit mounting portion 26 (see FIG. 3).
  • a bypass passage groove 68 is formed on the mounting surface 50 a of the device block 50.
  • the bypass passage groove 68 is formed corresponding to the bypass passage groove 37 (see FIG. 5) of the mounting surface 26a of the unit mounting portion 26 (see FIG. 6).
  • the bypass passage groove 68 forms a closed cross-section in cooperation with the bypass passage groove 37 when the mounting surface 50a of the device block 50 is brought into surface contact with the mounting surface 26a of the unit mounting portion 26.
  • a bypass passage 70 is formed.
  • the bypass passage 70 forms a series of “auxiliary intake passages” that bypass the throttle valve 14 by communicating with the bypass inlet hole 28 and the bypass outlet hole 30.
  • the passage wall portion of the bypass passage 70 is formed by the cooperation of the throttle body 2 and the device block 50.
  • the device block 50 is formed with a hollow cylindrical motor fitting portion 72 penetrating in the front-rear direction (vertical direction in FIG. 17).
  • a stepped portion 73 for reducing the diameter is formed in the front end portion of the motor fitting portion 72.
  • the motor fitting portion 72 is formed so that a step motor 108 of the ISC valve 51 described later can be fitted from behind (upper in FIG. 17).
  • the motor fitting portion 72 is referred to as “actuate It corresponds to “one-fitting part”.
  • a valve body fitting portion 74 having a cylindrical shape surrounding the motor fitting portion 72 and continuing to the stepped portion 73 is formed. Further, a flange portion 75 projecting in an annular shape is formed on the inner peripheral surface of the distal end portion of the valve body fitting portion 74.
  • a valve body 110 and a valve spring 138 of an ISC valve 51 which will be described later, can be fitted to the rear (upward in FIG. 17) force! /
  • the outer peripheral surface of the valve body fitting portion 74 is composed of a large-diameter portion 236 on the base side, a small-diameter portion 238 on the distal end side, a large-diameter portion 236, and a small-diameter portion. 238 and a tapered portion 237 that gently connects 238 to each other.
  • the large-diameter portion 236 of the valve body fitting portion 74 is formed so as to be fitted in the opening end portion of the valve body fitting portion hole portion 32a of the bypass outlet hole 30 of the unit mounting portion 26 (see FIG. 6 and Figure 7).
  • an appropriate number of positioning convex portions 76 are formed at equal intervals, that is, 180 ° intervals.
  • the positioning convex portion 76 extends in the axial direction (vertical direction in FIG. 17) of the valve body fitting portion 74.
  • a hollow rectangular tube-shaped pressure sensor fitting hole 77 is formed on the bottom surface of the housing recess 58 of the device block 50. Further, a circular hole-shaped pressure detection port 78 penetrating in the front-rear direction (vertical direction in FIG. 17) is formed at the center of the bottom surface of the pressure sensor fitting hole 77.
  • a sensor body 54a of a pressure sensor 54 described later can be fitted from behind (upper in FIG. 17). Further, in the pressure detection port 78, the pressure detection part 54b of the pressure sensor 54 can be fitted.
  • the device block 50 is formed with a temperature sensor insertion hole 80 penetrating in the front-rear direction (vertical direction in FIG. 18).
  • a hollow cylindrical detection cylinder 81 surrounding the front end opening of the temperature sensor insertion hole 80 projects from the mounting surface 50 a of the device block 50.
  • the distal end portion of the detection cylinder portion 81 is closed by an end plate portion 81a.
  • the detection cylinder 81 is formed so that a thermistor 140 of the temperature sensor 53 described later can be inserted through the temperature sensor insertion hole 80.
  • the detection cylinder portion 81 is formed so as to be fitted in the intake air temperature detection hole 42 (see FIG. 5) in the mounting surface 26a of the unit mounting portion 26 (see FIG. 4). As shown in FIG.
  • the first connecting groove 84, the second connecting groove 83, and the second connecting groove 84 located near the lower part of the valve body fitting portion 74.
  • a relay groove 87 is formed.
  • the second connecting groove 83 is formed so as to be able to be aligned with the front end portion (right end portion in FIG. 5) of the connecting groove 40 (see FIG. 5) on the mounting surface 26a of the unit mounting portion 26.
  • first connecting groove portion 84 is formed to be able to be aligned with the rear end portion (left end portion in FIG. 5) of the connecting groove 40 (see FIG. 5).
  • the relay groove 87 is formed so as to be able to be aligned with the sampling passage 39 (see FIG. 5) on the mounting surface 26a of the unit mounting portion 26.
  • the first communication groove 84, the second communication groove 83, the first throttle groove 86, the second throttle groove 85, and the relay groove 87 correspond to the "passage groove” in this specification, respectively.
  • the first communication groove portion 84, the first throttle groove portion 86, and the relay groove portion 87 constitute a “sampling passage groove” in this specification.
  • the second communication groove 83 and the second throttle groove 85 constitute a “pressure detection passage groove” in the present specification.
  • these groove portions 83, 84, 85, 86, 87, the communication groove 40, and the pressure detection port 78 are well represented in FIG.
  • a gasket fitting groove 90 having a U-shaped cross section is formed on the mounting surface 50 a of the device block 50.
  • the gasket fitting groove 90 is formed in an irregular mesh shape in which a total of five first to fifth annular groove portions 91 to 95 share a part with each other.
  • the first groove portion 91 is formed in an annular shape surrounding the connecting tube portion 66.
  • the first groove portion 91 corresponds to the “annular groove portion” in this specification.
  • the second groove portion 92 is formed in an annular shape surrounding the bypass passage groove 68 and the valve body fitting portion 74 and sharing the upper portion of the first groove portion 91.
  • the third groove portion 93 is formed in an annular shape that surrounds the detection cylinder portion 81 and shares the left end portion of the lower side portion of the second groove portion 91.
  • the fourth groove portion 94 surrounds the pressure detection port 78, the second communication groove portion 83, and the second throttle groove portion 85, and is located on the right side of the first groove portion 91 and below the second groove portion 91. It is formed in an annular shape sharing the central part of the side part.
  • the fifth groove portion 95 surrounds the first connecting groove portion 84, the first throttle groove portion 86, and the relay groove portion 87, and the right end portion of the lower side portion of the second groove portion 91 and the fourth groove portion 94. Share right side It is formed in an annular shape.
  • the gasket 180 fitted in the gasket fitting groove 90 will be described later.
  • the gasket fitting groove 90 corresponds to the “sealing member mounting groove” in this specification.
  • a connector portion 97 is integrally formed on the left side of the device block 50 by a resin mold molding.
  • the connector portion 97 is a collection of connector portions for each device component, that is, the ISC valve 51, the throttle position sensor 52, the temperature sensor 53, and the pressure sensor 54.
  • a predetermined number of terminals 98 are arranged in the connector portion 97 by insert molding.
  • these terminals 98 there are two each for the A phase and B phase (described later) of the step motor 108 of the ISC valve 51 described later, for throttle opening output, intake temperature output, intake pressure output, A total of nine terminals for power supply and ground (ground) correspond.
  • the terminal portions on the connector side of these terminals 98 are projected leftward in a state of being parallel to each other.
  • the terminal 98 on the opposite side of the terminal 98 (labeled with (a)) for power supply, ground, throttle opening output, and intake pressure output is the device block 50. It is bent toward the back side (upward in Fig. 13).
  • the terminal portion 98 (a) is arranged above the temperature sensor insertion hole 80 so as to form two left and right rows.
  • terminal portions (not shown) of a total of four terminals 98 for the A phase and the B phase applied to the step motor 108 to be described later are in the housing recess 58 of the device block 50. It is connected to the two upper and lower terminal boards 99a and 99b, which are arranged so as to form two different shapes on the bottom of the left and right sides (see Fig. 11). These terminal plates 99a and 99b are arranged in the left-right direction between the motor fitting portion 72 and the pressure sensor fitting hole 77 (see FIG. 15).
  • terminal portions (not shown) of the two terminals 98 for the ground and the intake air temperature output which are powerful for intake air temperature output, are located in the housing recess 58 of the device block 50 as shown in FIG. Are connected to the two upper and lower terminal plates 100a and 100b arranged on the bottom surface of the. These terminal plates 100a and 100b are adjacent to the upper and lower sides of the temperature sensor insertion hole 80.
  • the connector portion 97 is formed so that an external connector (not shown) that is electrically connected to a control device 102 (see FIG. 1) composed of an electronic control unit (ECU) can be connected by insertion. It is.
  • the control device 102 includes various detection devices such as ISC valve 51, throttle position sensor 52, temperature sensor 53, pressure sensor 54, other sensors and switches (not shown). An output signal is input.
  • the control device 102 controls a step motor 108 (described later) of the ISC valve 51 and other various devices (not shown) based on output signals from the various detection devices.
  • both reference pins 104 are formed in a stepped pin shape having a stepped surface 104a having a base portion side having a large diameter portion and a distal end side having a small diameter portion.
  • the tip of the small diameter portion is formed in a tapered shape that tapers.
  • both mounting pins 106 are formed in a stepped pin shape having a stepped surface 106a with the base side having a large diameter portion and the tip side having a small diameter portion.
  • the tip of the small diameter portion is formed in a tapered shape that tapers.
  • stepped surface 106a of the mounting pin 106 and the stepped surface 104a of the reference pin 104 are formed on a single plane orthogonal to the axis 64L of the rotor fitting hole 64. Further, in the empty space on the inner peripheral side of the peripheral wall portion 57, a support surface 107 is formed which is flush with both stepped surfaces 104a and 106a. The same flat surface formed by both stepped surfaces 104a and 106a and the support surface 107 serves as a reference surface DL when a wiring board 55 (described later) is assembled to the device block 50.
  • the ISC solenoid 51 includes a step motor (also called a stepping motor, a stepper motor, etc.) 108 and a valve body 110 that is moved forward and backward in the axial direction by the step motor 108. ing.
  • a bipolar type step motor is used for the step motor 108 of the present embodiment.
  • the step motor 108 is described in this specification. It corresponds to “actuator”.
  • the step motor 108 includes a stator 113 housed in a bottomed cylindrical motor housing 112 made of a ferromagnetic material, and a motor rotor 114 that rotates in the stator 113. ing.
  • the stator 113 includes a bobbin 115 made of resin.
  • the bobbin 115 is formed by insert-molding four yokes 116 and four terminals 117 (see FIG. 20). Further, two yokes 116 are arranged in a stack in the axial direction as one set.
  • the bobbin 115 has a cover plate 118 covering the yoke 116 and a pair of end plate portions 119 formed in a flange shape on the opening side of the motor housing 112 and protruding in parallel with the outer peripheral surface of the end plate portion 119.
  • Terminal support portions 120 and 121 are formed. In each of the terminal support portions 120 and 121, two base portions of the terminal 117 are embedded and supported (see FIG. 11). Each terminal 117 is drawn out in a stepped manner from each terminal support 120, 121. Also, as shown in Fig. 20, out of the total of four terminals 117 of the step motor 108, the two terminals 117 for A phase are marked with symbols (Sl) and (S2), and 2 for B phase. Symbols (S3) and (S4) are attached to the terminal 117 of the book.
  • the coil wire 122 is provided on the outer periphery of the bobbin 115 in two upper and lower stages.
  • the terminal portion of the coil wire 122 is connected to each terminal 117 (see FIG. 17).
  • a metal cover plate 123 that closes the open end surface of the motor housing 112 is superposed on the end plate portion 119 of the bobbin 115.
  • a pair of driving forces 124 and 125 are provided on the bottom plate portion 112 a of the motor housing 112 and the end plate portion 119 of the bobbin 115. Both the driving rings 124 and 125 are arranged on the same axis with respect to the bobbin 115.
  • the motor rotor 114 includes a metal round bar-shaped rotor shaft 127 and a cylindrical magnet 130 provided on the outer periphery of the rotor shaft 127.
  • the rotor shaft 127 is rotatably supported by the pair of dry bearings 124 and 125.
  • An end surface of the rotor shaft 127 on the cover plate 123 side is formed in a convex spherical shape, and can be brought into point contact with the cover plate 123.
  • a convex spherical convex portion 128 is formed on the other end surface of the rotor shaft 127, and it is possible to make point contact with the bottom surface in the cylindrical portion 132 of the valve body 110 facing it.
  • the magnet 130 is attached to the rotor shaft 127.
  • the two dry bearings 124 and 125 are provided so as to surround the shaft portion between them.
  • the magnet 130 corresponds to the inner peripheral surface of the yoke 116 with a predetermined gap, and the number of N poles and S poles corresponding to each magnetic pole tooth of the yoke 116 is alternately magnetized. It is.
  • a screw shaft portion 129 is formed at the tip end portion of the rotor shaft 127 protruding outside the motor housing 112.
  • the valve body 110 is made of, for example, a resin, and has a cylindrical portion 132 having a hollow cylindrical shape, and a tapered surface formed at a tip portion (lower end portion in Fig. 19) of the cylindrical portion 132.
  • a cylindrical valve tip portion 133 having 133a and a flange portion 134 projecting in an annular shape from the outer peripheral portion of the base end portion (the upper end portion in FIG. 19) of the cylindrical portion 132 are provided.
  • an appropriate number (in FIG. 20, four are shown) of positioning grooves 134a are formed on the outer peripheral surface of the flange portion 134 at equal intervals, that is, 90 ° intervals! .
  • the cylindrical portion 132 of the valve body 110 has an opening-side half (upper half in FIG. 19) as a large-diameter hole and a bottom-side half (lower in FIG. 19). It is formed in a stepped hole shape with the half part) as a small diameter hole.
  • a nut member 136 having a screw hole is integrally inserted by press-fitting (for example, heat-fitting).
  • a screw shaft portion 129 of the rotor shaft 127 is screwed into the nut member 136 (specifically, a screw hole).
  • the small diameter hole portion of the cylindrical portion 132 is formed so that the screw shaft portion 129 of the rotor shaft 127 can be loosely fitted.
  • the rotation of the motor rotor 114 allows the valve body 110 to move forward and backward in the axial direction through screwing of the screw shaft portion 129 and the nut member 136 (movable up and down in FIG. 19).
  • the convex portion 128 force of the rotor shaft 127 and the point contact with the bottom surface in the cylindrical portion 132 of the valve body 110 Further retraction of the valve body 110 is restricted.
  • the ISC valve 51 is mounted in the housing recess 58 of the device block 50.
  • the valve body 110 is fitted in the valve body fitting portion 74, and the step motor 108 is fitted in the motor fitting portion 72.
  • a valve spring 138 made of a coral spring is interposed between the flange portion 134 of the valve body 110 and the flange portion 75 of the valve body fitting portion 74.
  • valve spring 138 An end portion on the small diameter side of the valve spring 138 is fitted in an annular recess 134 b formed in an annular shape on the flange portion 134 of the valve body 110.
  • the noble spring 138 urges the motor rotor 114 together with the valve body 110 in the backward direction (upward in FIG. 22). Thereby, the end surface (upper end surface in FIG. 22) force of the rotor shaft 127 on the cover plate 123 side is held in a point contact state with the cover plate 123.
  • the positioning groove 134a (see Fig. 17) of the flange portion 134 of the valve body 110 is slidable on the positioning convex portion 76 (see Fig. 17) in the valve body fitting portion 74 of the device block 50. To be fitted. Thereby, the valve body 110 is prevented from rotating about the axis. At this time, since the positioning groove 134a is formed with a multiple of the positioning convex portion 76 (double in this embodiment), the valve body 110 is easily fitted into the valve body fitting portion 74 of the device block 50. be able to. Further, the valve tip portion 133 of the valve body 110 is inserted into the flange portion 75 of the valve body fitting portion 74 of the device block 50, and protrudes forward (downward in FIG. 22) from the flange portion 75. ing.
  • each terminal 117 force of the step motor 108 is within the accommodating recess 58 of the device block 50. It is placed on each terminal board 99a, 99b arranged on the bottom (see Fig. 21). In this state, each terminal 117 is connected to each terminal plate 99a, 99b by resistance welding or the like. Further, the step motor 108 is prevented from coming off by a device cover 60 provided in the device block 50 (see FIG. 19). A positioning structure for positioning the terminal support portions 120 and 121 of the step motor 108 of the ISC valve 51 will be described later.
  • the temperature sensor 53 incorporated in the housing recess 58 of the device block 50 will be described. As shown in FIG. 18, the temperature sensor 53 is composed mainly of a thermistor 140.
  • the thermistor 140 is inserted into the detection cylinder 81 through the temperature sensor insertion hole 80 of the device block 50. Accordingly, thermistor 140-2 The terminal portion 141a of the terminal 141 is placed on each terminal plate 100a, 100b disposed on the bottom surface in the housing recess 58 of the device block 50 (see FIG. 21). In this state, the terminal portions 141a of the terminals 141 are connected to the terminal plates 100a and 100b by resistance welding or the like. The positioning structure for positioning the terminal portion 141a of the terminal 141 of the thermistor 140 of the temperature sensor 53 will be described later.
  • the throttle position sensor 52 incorporated in the housing recess 58 of the device block 50 will be described.
  • the throttle position sensor 52 includes a sensor rotor 143 incorporated between the device block 50 and a wiring board 55 (described later).
  • the sensor rotor 143 is made of, for example, a resin, and protrudes toward the device block 50 side (lower side in FIG. 16) of the substantially disk-shaped rotor main part 143a facing the wiring board 55 and the rotor main part 143a.
  • the substantially cylindrical connecting tube portion 143b and the support shaft portion 143c protruding to the wiring board 55 side (upper side in FIG. 16) of the rotor main portion 143a are provided on the same axis.
  • the connecting cylinder portion 143b is loosely fitted in the flange portion 65 of the rotor fitting hole 64 (see FIGS. 12 and 13).
  • a leaf spring 144 is incorporated in the connecting cylinder portion 143b.
  • the plate spring 144 inertiaally holds the sensor rotor 143 in the radial direction in the sensor rotor connecting portion 24 when the sensor rotor 143 is connected to the sensor rotor connecting portion 24 of the throttle shaft 9.
  • the support shaft portion 143 c is loosely fitted in a support shaft portion through hole 158 formed in the wiring board 55. Further, the support shaft portion 143c is rotatably supported in a bearing recess 170 formed in the device cover 60 described later.
  • a wave washer (wave spring, between the flange 65 of the rotor fitting hole 64 and the annular opposed surface between the rotor main part 143a of the sensor rotor 143 is provided. Also called wave spring washer.) 145 is interposed. The wave shutter 145 always urges the sensor rotor 143 toward the device cover 60 side.
  • the wave washer 145 corresponds to an “elastic member” in this specification.
  • the surface (the upper surface in FIG. 12) of the rotor main portion 143a on the device cover 60 side is a slider that can slide on resistor portions 150 and 151 (described later) of the wiring board 55.
  • a brush 147 is provided.
  • the throttle position sensor 52 is electrically driven by the brush 147 sliding on the resistor parts 150 and 151 of the wiring board 55 as the sensor rotor 143 rotates.
  • the contact type throttle position sensor 52 converts the signal into a signal and outputs the signal.
  • the wiring board 55 is formed with an outer shape that can be fitted into the housing recess 58 of the device block 50 (see FIG. 24).
  • a predetermined wiring pattern 148 is printed on the surface of the wiring board 55.
  • a predetermined wiring pattern 149 is printed on the back surface of the wiring board 55.
  • both internal and external resistor parts 150 and 151 that form a fan shape corresponding to the brush 147 of the sensor rotor 143 are formed, and a pressure sensor 54 (described later) is mounted. ing.
  • the wiring board 55 is formed with a pair of upper and lower reference holes 153.
  • Both mounting holes 155 correspond to both reference pins 104 of the device block 50, and are formed so that they can be fitted to the small diameter portion on the tip side of the mounting pin 106 (see FIGS. 15 and 16).
  • the reference hole 153 is also used as a reference hole when the wiring patterns 148 and 149 are printed on the wiring board 55.
  • the wiring board 55 is formed with a pair of upper and lower mounting holes 155. Both mounting holes 155 correspond to both mounting pins 106 of the device block 50, and are formed so as to be fitted to the small diameter portion on the tip side of the mounting pin 106 (see FIGS. 15 and 16).
  • terminal through holes 157 are formed in the wiring board 55 in two rows on the left and right. These terminal through holes 157 correspond to the terminal portions 98 (a) on the side opposite to the connector of each of the four terminals 98 protruding on the bottom surface in the receiving recess 58 of the device block 50, The terminal portion 98 (a) is formed so as to be fitted (see FIG. 15).
  • a support shaft through hole 158 is formed at the center of the wiring board 55.
  • the support shaft portion through-hole 158 corresponds to the support shaft portion 143c of the sensor rotor 143, and is formed so as to be freely fitted on the support shaft portion 143c (see FIG. 16).
  • a pressure sensor 54 is mounted on the back surface of the wiring board 55.
  • the pressure sensor 54 includes a sensor main body 54a that is a main body of the pressure sensor 54, and a columnar pressure detection portion 54b that protrudes on the sensor main body 54a (front side in FIG. 26).
  • the sensor main body 54 a corresponds to the pressure sensor fitting hole 77 of the device block 50, and is formed so as to be fitted into the fitting hole 77.
  • the pressure detection unit 54b corresponds to the pressure detection port 78 of the device block 50, and is formed so as to be fitted to the pressure detection port 78 (see FIG. 17).
  • the wiring board 55 is formed with a long and narrow isolation hole 160 that crosses between the resistor parts 150 and 151 and a total of four terminal through holes 157. Yes.
  • the wiring board 55 is mounted in the housing recess 58 of the device block 50 as described below. That is, the wiring board 55 is fitted in the housing recess 58 so that the back surface thereof faces the bottom surface in the housing recess 58 of the device block 50 (see FIG. 24). At this time, the small diameter portions on the tip side of both reference pins 104 of the device block 50 are relatively fitted in both reference holes 153, so that the wiring board 55 is parallel to the plate surface, that is, in the radial direction. And positioned in the direction of rotation (see Figure 12). Further, the tapered portion at the tip of the small diameter portion of both reference pins 104 guides both reference holes 153, whereby the wiring board 55 can be quickly positioned at a predetermined position.
  • both reference holes 1 53 are brought into contact with the stepped surface 104a (see FIG. 16) of both reference pins 104, whereby the wiring board 55 is supported on the reference surface DL of the housing recess 58. (See Figure 12).
  • the wiring board 55 is supported on the reference plane DL of the receiving recess 58. (See Figure 12).
  • the small-diameter portion on the tip side of both mounting pins 106 of the device block 50 is relatively fitted in both mounting holes 155, and the edge of both mounting holes 155 is the stepped surface 106a (
  • the wiring board 55 is also supported on the reference plane DL of the housing recess 58 (see FIG. 12). At this time, the wiring board 55 can be positioned at a predetermined position with high speed and force also by the tapered portion of the tip of the small diameter portion of the both mounting pins 106 guiding the both mounting holes 155.
  • the device block is placed in each terminal through hole 157 (see Fig. 25) of the wiring board 55.
  • a total of four terminal portions 98 (a) (see FIG. 24) of the four terminals 98 protruding on the bottom surface in the receiving recess 58 of the socket 50 are inserted (see FIG. 24).
  • the conductive portions (not shown) of the wiring patterns 148, 149 (see FIG. 25 and FIG. 26) around the terminal insertion holes 157 of the wiring board 55 and the terminal portions 98 (a) of the terminals 98 are soldered.
  • the reference numeral 164 is attached to the connection part by soldering (see FIGS. 13 and 24).
  • the support shaft portion 143c of the sensor rotor 143 is loosely fitted in the support shaft portion through hole 158 of the wiring board 55 (see FIGS. 12 and 13).
  • the sensor body 54a of the pressure sensor 54 is fitted into the pressure sensor fitting hole 77 of the device block 50.
  • the pressure detector 54b is fitted into the pressure detection port 78 of the device block 50.
  • a seal material (not shown) for sealing between the sensor body 54a of the pressure sensor 54 and the pressure sensor fitting hole 77 is appropriately interposed.
  • the enormous portion 162 is formed by crushing the tip end portion of the mounting pin 106 protruding on the surface of the wiring board 55 by thermal force. As a result, the wiring board 55 is prevented from being detached from the device block 50.
  • the device cover 60 that covers the device components modularized in the device block 50 will be described.
  • the device cover 60 is made of resin and is formed in a flat plate shape having an outer diameter corresponding to the peripheral wall portion 57 of the housing recess 58 of the device block 50.
  • a pair of upper and lower reference recesses 168 are formed on the back surface of the device cover 60. Both reference recesses 168 correspond to both reference pins 104 of the device block 50, and are formed so that they can be fitted to the small-diameter portion on the tip side of the mounting pin 106 (see FIG. 16). Further, a bearing recess 170 is formed at the center of the back surface of the device cover 60 (see FIG. 28). The bearing recess 170 corresponds to the support shaft portion 143c of the sensor rotor 143, and is formed so that the support shaft portion 143c can be supported (see FIG. 16).
  • a pair of upper and lower force relief recesses 172 are formed (see FIG. 28). Both escape recesses 172 are mounted on both device blocks 50. It corresponds to the pin 106 and is formed so as to be able to accommodate the enormous portion 162 (see FIG. 12) of the mounting pin 106 (see FIG. 16). Further, a terminal relief S and a recess 173 are formed on the back surface of the device cover 60 (see FIG. 28). The escape recess 173 corresponds to the connection part 164 by soldering between the wiring board 55 and the terminal part 98 (a) of each terminal 98, and is formed so as to accommodate the connection part (see FIG. 13). ).
  • a motor relief recess 174 is formed on the back surface of the device cover 60 (see FIG. 13).
  • the relief recess 174 corresponds to the motor housing 112 of the step motor 108, and is formed so as to be able to accommodate the rear portion of the motor housing 112 (see FIGS. 6 and 7).
  • the device cover 60 is placed on the device block 50 so as to close the open end surface of the accommodation recess 58.
  • the device cover 60 is oriented in a direction parallel to the plate surface by relatively fitting the small-diameter portions of the tip ends of the reference pins 104 of the device block 50 into the reference recesses 168 of the device cover 60. In other words, it is positioned in the radial and rotational directions.
  • the shaft 143c of the sensor rotor 143 is relatively fitted in the bearing recess 170 of the device cover 60, so that the sensor rotor 143 is rotatably supported by the device cover 60.
  • the enormous portion 162 of the mounting pins 106 of the device block 50 is accommodated in the escape recess 172 for both caulking portions of the device cover 60 (see FIG. 12).
  • a connection part 164 by soldering the wiring board 55 and the terminal part 98 (a) of each terminal 98 is accommodated (see FIG. 13).
  • the rear portion of the motor housing 112 of the step motor 108 is accommodated in the motor escape recess 174 of the device cover 60 (see FIGS. 6 and 7).
  • the outer peripheral part of the device cover 60 is joined to the peripheral wall part 57 of the device block 50 by the resin welding (refer FIG. 12 and FIG. 13).
  • a gasket 180 is fitted into the gasket fitting groove 90 (see FIG. 14) of the device block 50.
  • the gasket 180 is integrally formed of a rubber-like elastic material and has a shape corresponding to the gasket fitting groove 90 (see FIG. 14) of the device block 50.
  • the gasket 180 has an annular first to fifth total of five seal portions 181 to 185. Are formed in an irregular mesh shape that shares a part with each other.
  • the first seal portion 181 is formed so as to be able to be fitted into the first groove portion 91 of the gasket fitting groove 90.
  • the first seal portion 181 is attached to the first groove portion 91 of the device block 50 and serves as a reference for attaching the gasket 180 to the gasket fitting groove 90.
  • the gasket 180 corresponds to a “seal member” in this specification. Further, the first seal portion 181 corresponds to an “annular seal portion” in this specification.
  • the second seal portion 182 is formed so as to be fitted in the second groove portion 92 of the gasket fitting groove 90.
  • the third seal portion 183 is formed so as to be able to fit into the third groove portion 93 of the gasket fitting groove 90.
  • the fourth seal portion 184 is formed so as to be able to fit into the fourth groove portion 94 of the gasket fitting groove 90.
  • the fourth seal portion 184 corresponds to an annular seal portion surrounding the pressure detection passage groove (that is, the second communication groove portion 83 and the second throttle groove portion 85).
  • the fifth seal portion 185 is formed so as to be able to be fitted into the fifth groove portion 95 of the gasket fitting groove 90.
  • the fifth seal portion 185 corresponds to an annular seal portion surrounding the sampling passage groove (that is, the first communication groove portion 84, the first throttle groove portion 86, and the relay groove portion 87).
  • gasket 180 is fitted into the gasket fitting groove 90 of the device block 50 when the device block 50 is attached to the throttle body 2.
  • the detailed structure of the gasket 180 will be described later.
  • the device unit 3 is made to correspond to the unit mounting portion 26 of the throttle body 2 (see the two-dot chain line 3 in FIG. 2).
  • the mounting surface 50a of the device block 50 of the device block 50 is brought into surface contact with the mounting surface 26a of the unit mounting portion 26 of the throttle body 2.
  • the screw holes 44a see Fig. 5 of the fastening boss portions 44 of the unit mounting portion 26 and the bolt insertion holes 62a (see Fig. 29) of the mounting boss portions 62 of the device block 50 are aligned.
  • the device block 50 By tightening the fastening bolt 45 into each screw hole 44a through each bolt insertion hole 62a, the device block 50 is attached to and detached from the throttle body 14 in the 9L direction (left and right direction in FIG. 3) of the rotation axis of the throttle valve 14. Mounted as possible ( Figure 1 to Figure 3).
  • the connecting tube portion 66 of the device block 50 is placed in the opening concave portion 22 of the bearing boss portion 10 of the unit mounting portion 26. Mated.
  • the sensor rotor connecting portion 24 of the throttle shaft 9 is connected to the connecting cylinder portion 143 b of the sensor rotor 143 via the leaf spring 144.
  • the sensor rotor 143 is coupled to the throttle shaft 9 so as to be rotatable together.
  • the leaf spring 144 holds the sensor rotor 143 in a radial direction relative to the sensor rotor connecting portion 24. Therefore, the throttle position sensor 52 can detect the opening degree of the throttle valve 14 with the rotation of the sensor rotor 143.
  • bypass passage groove 68 of the device block 50 is aligned with the bypass passage groove 37 of the unit mounting portion 26.
  • a bypass passage 70 that bypasses the throttle valve 14 is formed by forming a closed section and communicating the bypass inlet hole 28 and the bypass outlet hole 30.
  • intake air (auxiliary intake air) flowing from a binos passage portion 244 (described later) on the upstream side of the bypass outlet hole 30 has a large-diameter side hole portion 32 a and a small-diameter side side portion.
  • the vertical hole 31 flows out toward the center of the downstream side of the force bore 7 (see FIGS. 4 and 7).
  • the bypass passage portion 244 extends in the radial direction of the lateral hole portion 32.
  • valve body fitting portion 74 of the device block 50 is fitted into the valve body fitting portion hole portion 32a of the lateral hole portion 32 in the bypass outlet hole 30 of the unit mounting portion 26 (FIG. 6). And Figure 7).
  • the large-diameter portion 236 of the valve body fitting portion 74 is fitted into the opening end portion of the valve body fitting portion hole portion 32a of the bypass outlet hole 30 of the unit mounting portion 26, and the valve body fitting is performed.
  • An annular peripheral flow passage portion for supplying auxiliary intake air between the small diameter portion 238 of the joint portion 74 and the hole wall surface (corresponding to the passage wall surface) of the valve body fitting portion hole portion 32a surrounding the small diameter portion 238. 242 is formed.
  • the circumferential flow passage portion 242 communicates with the bypass passage portion 244 formed by the cooperation of the grooves of the bypass passage grooves 37 and 68.
  • the peripheral flow passage 242 is well shown in FIGS. 53 to 56.
  • the valve element 110 force of the ISC valve 51 is on the same axis (32L) with respect to the valve seat portion 33 of the small diameter side hole portion 32b of the lateral hole portion 32 of the bypass passage 70.
  • the valve tip portion 133 of the valve body 110 faces the valve seat portion 33.
  • the throttle shaft 9 is arranged so as to be movable back and forth in a direction parallel to the axis 9L of the throttle shaft 9 (see FIG. 7).
  • the step motor 108 of the ISC valve 51 is driven and controlled by the control device 102 (see FIG. 1) when the engine is idle.
  • valve seat portion 33 is closed by the valve body 110 of the ISC valve 51, that is, the valve closed state.
  • the motor rotor 114 rotates (for example, forward rotation) in the valve opening direction.
  • the rotation of the rotor shaft 127 of the motor rotor 114 causes the valve body 110 to be retracted (upwardly moved in FIG. 10) via the screw shaft portion 129 of the rotor shaft 127 and the nut member 136.
  • the valve seat portion 33 is opened (see FIG. 9).
  • valve closing signal is output from the control device 102 (see Fig. 1) to the step motor 108 in the open state of the ISC valve 51 (see Fig. 9)
  • the motor rotor 114 (see Fig. 19) It is rotated (eg reverse) in the valve closing direction. For this reason, the rotation of the rotor shaft 127 of the motor rotor 114 causes the valve body 110 to advance (downward movement in FIG. 9) through the threaded engagement between the screw shaft portion 129 of the rotor shaft 127 and the nut member 136. As a result, the valve seat portion 33 is closed (see FIG. 10).
  • the ISC valve 51 corresponds to an “idle control device” and an “auxiliary intake air amount control device” in this specification.
  • the detection cylinder 81 of the device block 50 force is inserted into the intake air temperature detection hole 42 of the unit mounting part 26, and the tip of the detection cylinder 81 protrudes into the bore 7. (See Fig. 4). Therefore, the tip of the detection cylinder 81 is exposed to the intake air flowing through the bore 7.
  • the temperature of the thermistor 140 (see FIG. 23) of the temperature sensor 53 disposed in the detection cylinder portion 81 of the device block 50 can be detected to detect the temperature of the intake air flowing in the bore 7, so-called intake air temperature. it can.
  • the thermistor 140 is a device pro By detecting the temperature (intake air temperature) at the front end of the detection cylinder 81 of the hook 50, it is converted into an electrical signal and the signal is output to the control device 102 (see FIG. 1).
  • the mounting surface 50a of the device block 50 is joined in surface contact with the mounting surface 26a of the unit mounting portion 26 of the body 5 to obtain a sampling path 39 (Fig. 32), a pressure introduction passage 187 communicating with the pressure detection port 78 (see FIG. 34) is formed.
  • the relay groove portion 87 of the device block 50 is aligned with the sampling passage 39 of the unit mounting portion 26 (see FIG. 32). Further, the open end surface of the first throttle groove 86 of the device block 50 is closed by the mounting surface 26a of the unit mounting portion 26 (see FIG. 32). Further, the first connecting groove portion 84 of the device block 50 is aligned with one end portion (rear end portion) of the connecting groove 40 of the unit mounting portion 26 (see FIGS. 32 and 33). Further, the open end surface of the central portion of the communication groove 40 of the unit mounting portion 26 is closed by the mounting surface 50a of the device block 50 (see FIG. 33).
  • the second connecting groove 83 of the device block 50 is aligned with the other end (front end) of the connecting groove 40 of the unit mounting portion 26 (see FIGS. 33 and 34). Further, the open end surfaces of the second throttle groove 85 and the pressure detection port 78 of the unit mounting portion 26 are closed by the mounting surface 50a of the device block 50 (see FIG. 34). Accordingly, the sampling passage 39, the middle I groove 87, the first throttle groove 86, the first communication groove 84, the communication groove 40, the second communication groove 83, the second throttle groove 85, and the pressure detection port 78 A pressure introduction passage 187 having a series of closed cross sections is formed (see FIG. 36).
  • the intake pressure (negative pressure) in the bore 7 acts on the pressure detection part 54b of the pressure sensor 54 from the pressure intake 38 through the pressure introduction passage 187, thereby reducing the intake pressure in the bore 7 to the pressure sensor. 54 can be detected. Further, the pressure sensor 54 detects the pressure acting on the pressure detection unit 54b through the pressure detection port 78, that is, the intake pressure (negative pressure) in the bore 7 on the downstream side of the throttle valve 14, thereby detecting the detection signal. (See Fig. 1).
  • the pressure introduction passage 187 extends from the sampling passage 39 on the body main body 5 side to the relay groove portion 87, the first throttle groove portion 86, and the first communication passage on the device block 50 side. Communicating with the tangle groove 84, further communicating with the connecting groove 40 on the body 5 side, and further The second communication groove 83 on the block 50 side, the second throttle groove 85, and the pressure detection port 78 are communicated. As a result, the pressure introduction passage 187 has a labyrinth structure that moves back and forth between the body 5 side and the device block 50 side that are not formed on the same plane.
  • the pressure introduction passage 187 includes the first passage portion 261 formed by the sampling passage 39 and the relay groove portion 87, the second passage portion 262 formed by the first throttle groove portion 86, the first communication groove portion 84, and the communication thereof.
  • passage part 261-267 It is comprised by the passage part 261-267.
  • These passage portions 261 to 267 are passage portions having mutually different passage cross-sectional areas and Z or volumes.
  • FIG. 36 shows the passage range of the passage portions 261 to 267.
  • the second passage portion 262 by the first restricting groove portion 86 and the sixth passage portion 266 by the second restricting groove portion 85 correspond to the “restricted passage portion that restricts the passage cross-sectional area” in this specification.
  • the seven-stage passage portions 261 to 267 in total are formed of passage portions having different natural frequencies.
  • the second passage portion 262 is a throttle passage portion whose cross-sectional area ratio with respect to the first passage portion 261 is 1Z10 or less.
  • the sixth passage portion 266 is a throttle passage portion having a cross-sectional area specific force of 1Z10 or less with respect to the fifth passage portion 265.
  • volume change of the passage portions communicating with each other that is, the volume change of the first passage portion 261 and the second passage portion 262, the volume change of the second passage portion 262 and the third passage portion 263, and the third Volume change of the passage part 263 and the fourth passage part 264, volume change of the fourth passage part 264 and the fifth passage part 265, volume change of the fifth passage part 265 and the sixth passage part 266, It is set to 50% or more. As a result, pressure noise in the high frequency range at the detected pressure can be attenuated.
  • the volume of the first passage portion 261 (corresponding to the sum of the volume of the sampling passage 39 and the volume of the relay groove portion 87) is the sum of the second to seventh passage portions 262 to 267. It is set to more than twice the volume. Thereby, even if the passage air contracts due to the rapid cooling of the device block 50, it is possible to prevent or reduce inhalation of foreign matters such as water and deposits from the first passage portion 261 to the second passage portion 262. . That is, for example, to the normal use temperature When cooling rapidly from the highest temperature of 120 ° C to 20 ° C, the passage air contracts to about 3Z4.
  • the first passage portion 261 even if the passage air is contracted by setting the volume of the first passage portion 261 to at least twice the total volume of the second to seventh passage portions 262 to 267, the first passage portion 261 Therefore, it is possible to prevent or reduce foreign material from being sucked into the passage portion downstream from the second passage portion 262. Thereby, it is possible to prevent or reduce a decrease in accuracy of pressure detection by the pressure sensor 54.
  • the gasket 180 (see Fig. 29) mounted in the gasket fitting groove 90 of the device block 50 is attached to the mounting surface of the device block 50.
  • the mechanical connection part and communication part between 50a and the mounting surface 26a of the unit mounting part 26 are elastically sealed (see FIG. 3).
  • the shared seal portion (reference numeral 180a) of the fourth seal portion 184 and the fifth seal portion 185 of the gasket 180 is the second seal portion 182 and the fourth seal portion 185.
  • T for the common seal part (symbol, 180b) with the seal part 184 and the common seal part (symbol, 180c) for the second seal part 182 and the fifth seal part 185 It is continuous in a letter shape. For this reason, when the common seal portion 180a is not continuous with the common seal portion 180b and the common seal portion 180c, the installation of the gasket 180 with respect to the device block 50 can be improved. As shown in FIG. 33, the common seal portion 180a crosses the open end surface of the connecting groove 40 of the unit mounting portion 26 of the body body 5 and the open end surface of the connecting groove 40a. It doesn't bisect. The common seal portion 180a corresponds to the “common seal portion facing the opening surface of the connecting groove of the single body” in the present specification.
  • the device cover 60 is joined to the device block 50 by laser one welding over the entire circumference.
  • the device block 50 is formed of an absorbent resin material having a high laser light absorption rate.
  • the resin block of the device block 50 is, for example, a polybutylene terephthalate resin (PBT) mixed with approximately 30% by weight of glass fiber and a predetermined colorant such as carbon black, dye or pigment. Can be used.
  • the device cover 60 is formed of a transparent resin material having a high laser beam transmittance.
  • the resin material of the device cover 60 for example, polybutylene terephthalate resin (PBT) mixed with about 30% by weight of glass fiber can be used.
  • the gasket main body 271 is formed in a rectangular shape with a long cross section that lengthens the front and back direction (up and down in FIG. 38). As shown in FIG. 42, the gasket main body 271 is formed symmetrically with respect to a center line 271C (see FIGS. 37 and 38) aligned with the groove center 90C of the gasket fitting groove 90 of the device block 50. Has been.
  • the width 271W (see FIG. 38) in the radial direction of the gasket body 271 is set to about 0.5 to 0.7 times the groove width 90W (see FIG. 42) of the gasket fitting groove 90. As a result, the gasket body 271 is formed so as to be loosely fitted in the gasket fitting groove 90 (see FIG.
  • the thickness 271t (see Fig. 38) of the gasket body 271 in the front and back direction is set to about 1.1 to 1.3 times the depth 90d of the gasket fitting groove 90 (see Fig. 42). Yes.
  • the front end Protrudes from the mounting surface 50a of the device block 50 (see FIG. 42).
  • the abutting portion 272 has a front side (upper side in Fig. 39) or a rear side (see Fig. 39) with respect to the central portion of both side surfaces of the gasket body portion 271. 39, it is formed in an arc shape when viewed from the lower side.
  • the contact portion 272 extends in the front and back direction of the gasket body portion 271 (vertical direction in FIG. 39).
  • the contact portion 272 is formed in line symmetry with respect to the center line 271C of the gasket main body portion 271.
  • FIG. 39 the abutting portion 272 has a front side (upper side in Fig. 39) or a rear side (see Fig. 39) with respect to the central portion of both side surfaces of the gasket body portion 271. 39, it is formed in an arc shape when viewed from the lower side.
  • the contact portion 272 extends in the front and back direction of the gasket body portion 271 (vertical direction in FIG. 39).
  • the contact portion 272 is formed in line symmetry with
  • the abutting portion 272 is related to the circumferential direction of the first seal portion 181, the second seal portion 182, the fourth seal portion 184, and the fifth seal portion 185 of the gasket 180. It is formed at predetermined intervals. Further, on the inner surface of the third seal portion 183, contact portions 272 (same reference numerals) as the contact portions 272 are formed at predetermined intervals in the circumferential direction. The outer end portions of these contact portions 272 are formed so as to be close to the groove wall surface 90b of the fitting groove 90 when the gasket body portion 271 is fitted into the gasket fitting groove 90 ( (See Fig. 43)
  • the retaining portion 273 is opposed to the outer end portion of the contact portion 272.
  • The! / which is on the front side (upper side in FIG. 41), is formed in a semicircular shape when viewed from the back side (lower side in FIG. 41).
  • the retaining portion 273 extends along the outer end portion of the contact portion 272 in the front and back direction of the gasket main body portion 271 (vertical direction in FIG. 39).
  • the retaining portion 273 is formed symmetrically with respect to the center line 271C of the gasket body portion 271 as a reference.
  • the retaining portion 273 includes the retaining portion 273 of the first seal portion 181, the second seal portion 182, the fourth seal portion 184, and the fifth seal portion 185 of the gasket 180. It is formed in a retaining portion 273 selected from among them. Further, the retaining portions 273 are formed in all the retaining portions 273 in the third seal portion 183 of the gasket 180. These stoppers 273 are formed so as to be capable of elastic contact with the groove wall surface 90b of the fitting groove 90 when the gasket body 271 is fitted into the gasket fitting groove 90. (See Figure 44).
  • a pair of support wall portions 2 positioned between the motor fitting portion 72 and the two terminal plates 99a, 99b. 74 is formed on the bottom surface in the housing recess 58 of the device block 50.
  • a concave groove 275 is formed between the two support walls 274. Concave The groove portion 275 is formed so that the terminal support portion 121 on the insertion side (the lower side in FIG. 46) of the step motor 108 can be closely fitted.
  • the recessed groove portion 278 (specifically, both support wall portions 274 forming the recessed groove portion 278) is formed at the same time as the resin block forming of the device block 50.
  • the terminal support portion 121 of the step motor 108 is fitted into the concave groove portion 275 of the motor fitting portion 72. (See Figure 48). As a result, the terminal support 121 is positioned, and the terminal support 120 integrated with the terminal support 121 is positioned.
  • the recessed groove portion 275 corresponds to a “positioning portion” in the present specification.
  • the terminal plates 99a and 99b correspond to the “terminal part” in this specification.
  • a support wall 277 surrounding the opening end of the temperature sensor insertion hole 80 is formed on the bottom surface in the housing recess 58 of the device block 50.
  • a pair of concave groove portions 278 are formed in the support wall portion 277.
  • Each concave groove 278 is opened so as to communicate between the temperature sensor insertion hole 80 and each terminal plate 100a, 100b.
  • each concave groove 278 is formed so that the terminal portion 141a of the terminal 141 of the thermistor 140 can be closely fitted.
  • Each concave groove portion 278 (specifically, the support wall portion 277 forming the concave groove portion 278) is formed at the same time as the resin block molding of the device block 50.
  • a tapered guide groove 279 that gradually increases the groove width from the recessed groove portion 278 toward the opening side is formed in the opening side half of the recessed groove portion 278.
  • the terminal portions 141a of both terminals 141 of the thermistor 140 are connected to the guide grooves 279 of the support wall 277. And is fitted into the groove 278 through (see FIG. 51). As a result, the terminal portions 141a of both terminals 141 are positioned.
  • the concave groove portion 278 corresponds to a “positioning portion” in this specification.
  • the terminal plates 100a and 100b correspond to “terminal portions” in the present specification.
  • the sampling passage 39 communicates with the pressure detection port 78 by joining the mounting surface 26a of the body 5 and the mounting surface 50a of the device block 50.
  • a pressure introducing passage 187 is formed (see FIG. 36). Therefore, the pressure introduction passage 187 can be easily formed by the cooperation of the mounting surface 26a of the body 1 and the mounting surface 50a of the device block 50. As a result, mass productivity can be improved and cost reduction can be realized.
  • the connecting groove 40 provided on the mounting surface 26a of the body 1 of the body 5 has a closed cross-section by joining the mounting surface 50a of the device block 50, at least a part of the pressure introduction passage 187 can be easily formed. Can be formed (see FIG. 36).
  • the first connecting groove 84, the first narrowing groove 86, and the relay groove 87 provided on the mounting surface 50a of the device block 50 are closed to form a closed cross-section by joining the mounting surface 26a of the body body 5.
  • the pressure introduction passage 187 can be easily formed (see FIG. 32).
  • the second communication groove 83 and the second throttle groove 85 provided on the mounting surface 50a of the device block 50 are closed by joining the mounting surface 26a of the body 5 so that pressure can be introduced. At least a part of the passage 187 can be easily formed (see FIG. 34).
  • a sampling passage groove (first communication groove portion 84, first throttle groove portion 86 and relay groove portion 87) provided on the mounting surface 50a of the device block 50, and pressure detection passage groove (second portion).
  • Connecting groove 83 and second throttle groove 85), and connecting groove 40 formed on mounting surface 26a of body body 5 is attached to mounting surface 26a of body body 5 and mounting surface 50a of device block 50.
  • a series of pressure introduction passages 187 from the sampling passage 39 to the pressure detection port 78 can be easily formed.
  • the pressure introduction passage 187 includes seven passage portions 261 to 167 having different passage cross-sectional areas and Z or volumes (see FIG. 36).
  • the pulsation of the detected pressure due to the turbulence of the intake flow by the throttle valve 14 can be reduced, and the detection accuracy of the intake pressure by the pressure sensor 54 can be improved.
  • This is effective in reducing the size of the intake device 1 by making it possible to place the pressure inlet 38 close to the throttle valve 14 (see FIG. 4).
  • a second passage portion 262 and a sixth passage portion 266 that narrow the passage cross-sectional area are formed in the pressure introduction passage 187 (see FIG. 36).
  • the intake air flow by the throttle valve 14 is reduced.
  • the pulsation of the detected pressure due to turbulence can be reduced, and the accuracy of detecting the intake pressure by the pressure sensor 54 can be improved.
  • the pressure introduction passage 187 can be sealed by the gasket 180 interposed between the mounting surface 26a of the body 1 and the mounting surface 50a of the device block 50 (see FIG. 36).
  • the gasket 180 interposed between the mounting surface 26a of the body 1 and the mounting surface 50a of the device block 50 (see FIG. 36).
  • gasket 180 can be mounted in the gasket fitting groove 90 formed in the mounting surface 50a of the device block 50 (see FIG. 29).
  • the mounting of the first seal portion 181 of the gasket 180 to the first groove portion 91 of the gasket fitting groove 90 serves as a reference for the mounting of the gasket 180 to the gasket fitting groove 90.
  • the gasket 180 can be easily mounted in the gasket fitting groove 90 (see FIG. 29).
  • the connecting groove portion 83 and the second throttle groove portion 85), and the annular fourth seal portion 184 and the force seal body 5 and the common seal portion 180a facing the opening surface of the connecting groove 40 of the body 5 are continuous ( (See Figure 31). Therefore, it is possible to improve the installation of the seal portions 185 and 184 that are continuous with each other in the gasket 180.
  • the gasket body 271 of the gasket 180 fits loosely into the gasket fitting groove 90, so that the gasket 180 can be easily mounted in the gasket fitting groove 90 ( (See Figure 42).
  • the retaining portion 273 provided in the gasket 180 is abutted against the groove wall surface 90b in the gasket fitting groove 90, so that the gasket 180 is prevented from being removed in the gasket fitting groove 90. (See Figure 44).
  • the contact portion 272 provided on the gasket 180 is formed on the groove wall surface 90b of the gasket fitting groove 90.
  • buckling of the gasket 180 specifically, the gasket body 271 due to the joining of the mounting surface 26a of the body 5 and the mounting surface 50a of the device block 50 can be prevented or reduced (see FIG. 43). reference).
  • the sealing performance of the gasket 180 can be improved.
  • each terminal 117 of the step motor 108 of the ISC valve 51 is electrically connected to the terminal plates 99a, 99b of the device block 50. Then, the terminal support portion 121 (120) of the step motor 108 is positioned by the concave groove portion 275 provided in the device block 50 (see FIG. 48). As a result, it is possible to prevent or reduce the displacement of the terminals 117 when the terminals 117 are connected to the terminal plates 99a and 99b by welding or the like, thereby improving productivity.
  • terminal support portion 121 (120) of the step motor 108 can be easily positioned with respect to the concave groove portion 275 formed in the device block 50 (see FIG. 48).
  • the terminal portion 141a of the terminal 141 of the thermistor 140 of the temperature sensor 53 is electrically connected to the terminal plates 100a and 100b of the device block 50. Then, the terminal portion 141a of the terminal 141 of the thermistor 140 is positioned by the recessed groove portion 278 provided in the device block 50 (see FIG. 51). For this reason, it is possible to prevent or reduce the occurrence of the vibration of the terminal 141 of the thermistor 140 of the temperature sensor 53 and the disconnection due to the vibration due to vehicle vibration or the like.
  • the disconnection here corresponds to disconnection of the terminal 141 itself and disconnection due to breakage of the welded portion between the terminal 141 and the terminal plates 100a and 100b.
  • the terminal portion 141a of the terminal 141 of the thermistor 140 can be easily positioned with respect to the concave groove portion 278 formed in the device block 50 (see FIG. 51).
  • the cost can be reduced by forming the concave groove portions 275, 278 simultaneously with the molding of the resin of the device block 50.
  • a valve that bypasses the throttle valve 14 is used as a device component other than the pressure sensor 54.
  • An ISC valve 51 that controls the amount of auxiliary intake air flowing through the bypass passage 70 can be provided (see FIGS. 6 and 7).
  • a throttle position sensor 52 for detecting the opening degree of the throttle valve 14 can be provided (see FIG. 3).
  • a temperature sensor 53 for detecting the intake air temperature can be provided (see FIG. 23).
  • the device block 50 is detachably fastened to the throttle body 2 with fastening bolts 45 (see FIGS. 1 and 2), the fastening bolts 45 are removed as necessary. As a result, the device block 50 can be separated from the throttle body 2. Therefore, maintenance of the throttle body 2 and the device block 50 can be easily performed.
  • the device unit 3 described above it is possible to provide the device unit 3 used in the engine intake device 1 in which the pressure introduction passage 187 (see Fig. 36) can be easily formed (see Fig. 36). 1 to Figure 3).
  • an auxiliary intake air amount so-called bypass air amount flowing through a bypass passage 70 (see FIG. 6) bypassing the throttle valve 14 when the valve body 110 is operated by the step motor 108.
  • the bypass passage 70 is parallel to the rotation axis (9L) of the throttle valve 14 and has a side hole portion 32 having a valve seat portion 33 corresponding to the valve body 110, and the side hole portion 32 is bent.
  • a vertical hole portion 31 that is communicated via the portion 240 and joined to the bore 7 is provided (see FIG. 53). Therefore, even if the exhaust gas blown back from the engine side flows back through the vertical hole portion 31, the back flow is obstructed at the bent portion 240, so that the exhaust gas can be prevented from flowing back through the bypass passage 70.
  • valve body 110 is operated in the direction of the center line (straight line 32L) of the lateral hole portion 32 of the bypass passage 70 (the left-right direction in FIG. 53). For this reason, by avoiding a face-to-face collision of the exhaust gas with the peripheral side surface of the valve body 110, it is possible to prevent or reduce the adhesion of foreign substances contained in the exhaust gas to the peripheral side surface of the valve body 110.
  • the ISC valve 51 can be made compact by providing the valve body fitting portion 74 of the device block 50 in which the valve body 110 is built in the lateral hole portion 32 of the bypass passage 70 so as to be movable forward and backward. (See Figure 53 and Figure 54).
  • annular peripheral flow passage portion 242 for flowing auxiliary intake air is formed between the passage wall surface of the lateral hole portion 32 of the bypass passage 70 and the small diameter portion 238 of the outer peripheral surface of the valve body fitting portion 74. (See Figure 53 to Figure 56).
  • the auxiliary intake air flowing from the bypass passage portion 244 upstream of the peripheral flow passage portion 242 flows along the peripheral flow passage portion 242 (see arrows Y3 in FIGS. 54 to 56).
  • the joint 74 can be exposed to the auxiliary intake air over the entire circumference. For this reason, it is possible to eliminate the stagnation of the auxiliary intake air at the outer peripheral portion of the valve body fitting portion 74. Thereby, the flow of the auxiliary intake air can be smoothed and the auxiliary intake air amount can be increased.
  • the auxiliary intake volume was improved by about 20%.
  • the diameter of the valve seat portion 33 with respect to the valve body 110 can be reduced, and the pressure receiving area of the valve body 110 can be reduced.
  • the operating force of the step motor 108 is reduced.
  • the step motor 108 can be reduced in size. Even if foreign matter contained in the exhaust gas adheres to the passage wall surface of the bypass passage 70 and the outer surface of the valve body 110, the foreign matter is promptly passed along with the auxiliary intake air due to the increase of the auxiliary intake air amount. Can be put on the road.
  • the vertical hole 31 of the bypass passage 70 is formed in a straight shape, the vertical hole 31 Can be easily formed by drilling, resin molding, or the like.
  • a foreign substance reservoir 35 is formed at the upstream end (upper end in FIG. 53) of the vertical hole 31 of the bypass passage 70 so as to cross the horizontal hole 32 and form a bag path. For this reason, even if the exhaust gas that is going to blow back into the bypass passage 70 also flows back through the vertical hole 31 (see arrow Y1 in FIG. 53), the reverse flow stops in the foreign material reservoir 35. Become. For this reason, the foreign substance force contained in the exhaust gas easily accumulates in the foreign substance reservoir 35, so that the reverse flow of the exhaust gas upstream of the bent portion 240 of the bypass passage 70 and the foreign substance contained in the exhaust gas Reaching the outer surface or the valve seat 33 can be prevented or reduced.
  • the vertical hole 31 of the bypass passage 70 extends upward from the top of the bore 7 (the upper end in FIG. 53). For this reason, the foreign matter accumulated in the foreign matter reservoir 35 of the vertical hole portion 31 can be discharged by the dropping action of gravity in addition to the suction action of the intake air flowing through the bore 7 by the bench-lily effect.
  • the vertical hole portion 31 of the bypass passage 70 is formed in an inclined shape in which the downstream side inclines toward the downstream side of the intake passage as compared with the upstream side (see FIG. 4). For this reason, the suction action by the bench effect of the intake air flowing through the bore 7 is improved, and the foreign matter accumulated in the foreign matter reservoir 35 of the vertical hole 31 can be quickly discharged.
  • the ISC valve 51 that can inhibit the backflow of exhaust gas in the bypass passage 70 is modularized in the device block 50.
  • the device unit 3 can be attached to or detached from the throttle body 2.
  • bypass passage 70 (see Fig. 6) can be easily formed by the cooperation of the throttle body 2 and the device unit 3.
  • the device block 50 is detachably fastened to the throttle body 2 with fastening bolts 45 (see FIGS. 1 and 2), the fastening bolts 45 are removed as necessary. As a result, the device block 50 can be separated from the throttle body 2. Therefore, maintenance of the throttle body 2 and the device block 50 can be easily performed. [0196] [Example 2]
  • the vertical hole portion 31 of the bypass outlet hole 30 is formed by a straight circular through hole extending along the straight line 31L.
  • the opening end on the side opposite to the bore of the vertical hole 31, that is, the upstream end is opened on the upper surface side of the unit mounting portion 26.
  • An injector 210 is provided at the opening end of the vertical hole 31 on the side opposite to the bore.
  • the fuel injection device 200 is configured with the main body 5 and the injector 210 as main components (see FIG. 60).
  • a structure for mounting the injector 210 to the body 1 of the body 210 of the throttle body 12 will be described.
  • the injector 210, the injector mounting portion 230 of the body 1 to which the injector 210 is mounted, and the mounting procedure of the injector 210 will be described in this order.
  • the injector 210 is a so-called electromagnetic fuel injection valve, and includes a fuel injection unit 212 on the fuel injection side provided at one end (the right end in FIG. 63) and the other end. Connector (214 at the left end in FIG. 63), and a fuel connector portion 216 provided at one end of the other end (the back side in FIG. 63, the right side in FIG. 61). Yes.
  • Injector 210 includes a needle valve (not shown) and a solenoid for driving the needle valve. The solenoid is not shown in the figure! It is electrically connected to the cord 215 of the electrical connector 214 through an energization circuit.
  • a fuel supply pipe that supplies fuel pumped up from the fuel tank by driving a fuel pump (not shown) is connected to the fuel connector portion 216. Then, the dollar valve is driven, that is, moved axially by the solenoid in the injector 210, so that the fuel pressure-fed into the injector 210 through the fuel connector portion 216 is injected from the front end surface of the fuel injection portion 212.
  • the injector 210 sprays with a spray angle 213 ⁇ .
  • the resulting foggy fuel is indicated by a two-dot chain line 213. Further, since the injector 210 is a known one, its details U and description are omitted.
  • a base portion 218 common to the electrical connector portion 214 and the fuel connector portion 216 is formed in a block shape that bulges around the base end portion of the fuel injection portion 212.
  • An end surface of the base 218 on the fuel injection portion 212 side is a contact surface 218a corresponding to a mounting surface 232 (described later) of the body 1 (see FIG. 62).
  • the fuel injection portion 212 has a large diameter portion 212a on the proximal end side and a small diameter portion 212b on the distal end side.
  • An O-ring 220 is mounted between the large diameter portion 212a and the small diameter portion 212b.
  • an injector mounting portion 230 of the body 1 will be described. As shown in FIG. 64, an injector mounting portion 230 is integrally formed in a block shape on the upper portion of the bore wall portion 6 of the body 1 of the body. A vertical hole 31 of the bypass outlet hole 30 passes through the injector mounting part 230, and a mounting surface 2 32 perpendicular to the center line (straight line) 31L of the vertical hole 31 is formed.
  • the vertical hole portion 31 is connected to the small-diameter hole portion 32b of the horizontal hole portion 32 in an elbow shape, and has a straight outflow passage portion 221 that merges with the bore 7, and its outflow
  • a straight injector mounting hole portion 223 that communicates in a continuous manner across the small-diameter hole portion 32 b of the horizontal hole portion 32.
  • the injector mounting hole portion 223 includes a fitting hole portion 223a that continues to the outflow passage portion 221 with the same hole diameter, a seal hole portion 223b that continues to the fitting hole portion 223a and increases its hole diameter, and a seal thereof. It has a receiving hole portion 223c that is continuous with the hole portion 223b and has a large hole diameter and opens to the mounting surface 23 2 of the injector mounting portion 230.
  • the fitting hole 223a is formed with a hole diameter that allows the small-diameter portion 21 2b (see FIG. 63) of the fuel injection portion 212 of the injector 210 to be loosely inserted.
  • the seal hole portion 223b is formed with an outer diameter that allows the large-diameter portion 212a (see FIG. 63) of the fuel injection portion 212 to be loosely inserted, and that the O-ring 220 can be brought into close contact using elastic deformation.
  • the center line (straight line) 31L of the vertical hole portion 31 has a predetermined angle 31 ⁇ with respect to the center line 7L of the bore 7. The angle 31 ⁇ is set to about 30 °, for example.
  • the fuel injection portion 212 of the injector 210 is inserted into the injector mounting hole 223 in the injector mounting portion 230 of the body single body 5. Then, the contact surface 218a of the indicator 210 is brought into contact with or close to the mounting surface 232 of the injector mounting portion 230. Then, the small diameter portion 212b of the fuel injection portion 212 is inserted into the fitting hole portion 223a of the injector mounting hole portion 223.
  • the tip half of the large-diameter portion 212a of the fuel injection section 212 is inserted into the seal hole 223b of the injector mounting hole 223, and the base-side half of the large-diameter portion 212a is It is inserted into the receiving hole 223c of the injector mounting hole 223 in a loose fit. Further, since the O-ring 220 is inertially fitted into the seal hole 223b, a seal is formed between the fuel injection part 212 and the injector mounting part 230.
  • the indicator 210 is fixed to the body body 5 of the throttle body 2 by an appropriate fixing method such as screwing, snap fitting, clip, or press fitting.
  • the auxiliary intake air whose upstream side force has also flowed into the small-diameter hole 32b of the horizontal hole 32 of the bypass outlet hole 30 passes from the small-diameter hole 32b of the horizontal hole 32 to the vertical hole. It flows into the bore 7 through the outlet passage part 221 of 31. At this time, the atomized fuel (refer to the two-dot chain line 213 in FIG.
  • valve seat portion 33 in the binos outlet hole 30 corresponds to the “control position of the auxiliary intake air amount” in the present specification. Further, the valve seat portion 33 (see FIG. 7) force at the bypass outlet hole 30 is also the passage partial force from the small diameter side hole portion 32b to the downstream end of the outflow passage portion 221. This corresponds to the “downstream passage section”.
  • the bypass passage 70 in the body 1 of the throttle body 2 that forms the bypass passage 70 (see Fig. 6) that bypasses the throttle valve 14 in the bore 7 of the engine.
  • An injector 210 for injecting fuel into the bypass outlet hole 30 is provided (see FIG. 62). Therefore, the bypass outlet hole 30 of the bypass passage 70 also serves as the injector mounting passage, so that compactness and low cost can be achieved. That is, as described in the prior art, the bypass passage 70 and the Compared to the case where the projector mounting passages are set individually, the number of passages is one, so compact toy can be achieved and the processing man-hours required to form the passages can be reduced. Costs required can be reduced. Further, since only one passage is required, the angle 310 (see FIG. 62) at which the outflow passage 221 joins the bore 7 can be set to about 30 ° or less.
  • the engine side force can also prevent or reduce the exhaust gas blowback into the outflow passage 221. For this reason, it is possible to prevent or reduce foreign matter force such as deposits contained in the exhaust gas from adhering to the wall surface of the outflow passage portion 221 and backflow to the ISC solenoid 51 side through the outflow passage portion 221. it can.
  • the injector 210 is connected to the passage portion downstream of the control position (valve seat portion 33) of the auxiliary intake air amount by the ISC valve 51 in the bypass passage 70 (see Fig. 6) (specifically, the outflow passage portion 221). It is arranged at a position where fuel is injected inward (see Fig. 62). For this reason, the atomized fuel injected from the injector 210 (see the two-dot chain line 213 in FIG. 62) can quickly flow into the bore 7.
  • the injector 210 is disposed at a position for injecting fuel from the upstream side to the downstream side of the straight outflow passage portion 221 of the passage portion on the downstream side of the bypass passage 70 (see FIG. 62). ). For this reason, the atomized fuel injected from the injector 210 (refer to the two-dot chain line 213 in FIG. 62) can quickly flow into the bore 7.
  • the vertical hole portion 31 of the bypass outlet hole 30 of the bypass passage 70 is formed in a straight shape, the vertical hole portion 31 can be easily formed by drilling, resin molding, or the like. Further, the vertical hole portion 31 can be easily formed by forming the vertical hole portion 31 in the mounting surface 232 side force of the indicator mounting portion 230 toward the bore side.
  • the device block 50 of the device unit 3 can be detachably or non-detachably provided on the body 1 of the throttle body 2. it can. Therefore, it becomes easy to mount at least one device component (ISC solenoid 51) on the throttle body 2.
  • a no-pass passage 70 (see Fig. 6) that bypasses the throttle valve 14 is formed by using the body body 5 as a passage-forming member, and fuel is directed toward the inside of the bypass passage 70 in the body body 5. Is provided (see FIG. 62). Therefore, as described above, since the no-pass outlet hole 30 of the no-pass passage 70 also serves as the injector mounting passage, compactness and low cost can be achieved. In addition, since the air assist effect by auxiliary intake to the atomized fuel injected from the injector 210 (see the two-dot chain line 213 in FIG. 62) is obtained, atomization of the atomized fuel is promoted and combustion efficiency is improved. be able to.
  • an ISC valve 51 for controlling the amount of auxiliary intake air flowing in the bypass passage 70 can be provided.
  • the injector 210 is connected to a passage portion downstream of the control position (valve seat portion 33) of the auxiliary intake air amount by the ISC valve 51 in the bypass passage 70 (see FIG. 6) (specifically, the outflow passage portion 221). It is arranged at a position where fuel is injected inward (see Fig. 62). For this reason, the atomized fuel injected from the injector 210 (see the two-dot chain line 213 in FIG. 62) can quickly flow into the bore 7.
  • the injector 210 is arranged at a position for injecting fuel from the upstream side to the downstream side of the straight outflow passage portion 221 of the passage portion on the downstream side of the bypass passage 70 (see FIG. 62). ). For this reason, the atomized fuel injected from the injector 210 (refer to the two-dot chain line 213 in FIG. 62) can quickly flow into the bore 7.
  • the vertical hole portion 31 of the bypass outlet hole 30 of the bypass passage 70 is formed in a straight shape, the vertical hole portion 31 can be easily formed by drilling, resin molding, or the like. Further, the vertical hole portion 31 can be easily formed by forming the vertical hole portion 31 in the mounting surface 232 side force of the indicator mounting portion 230 toward the bore side.
  • the angle 31 ⁇ (see Fig. 62) at which the outflow passage 221 joins the bore 7 is approximately 30 °. Therefore, the atomized fuel injected from the injector 210 (see the two-dot chain line 213 in FIG. 62) can quickly flow into the bore 7.
  • the outflow passage portion 221 joins the top of the bore 7 when the intake device 1 is mounted (see FIG. 62). For this reason, the injector 210 can be placed on the upper portion of the intake device 1 on which it is mounted.
  • bypass passage 70 (see FIG. 6) can be easily formed by the cooperation of the body 1 and the device block 50.
  • a throttle position sensor 52 that detects the opening of the throttle valve 14
  • a temperature sensor 53 that detects the intake air temperature in the bore 7, and an intake pressure in the bore 7 is detected.
  • a pressure sensor 54 may be provided.
  • the device block 50 Since the device block 50 is detachably fastened to the throttle body 2 with fastening bolts 45 (see Figs. 58 and 2), the fastening bolts 45 are removed as necessary. As a result, the device block 50 can be separated from the throttle body 2. Therefore, maintenance of the throttle body 2 and the device block 50 can be easily performed.
  • the injector 210 is arranged in the body 1 so as to inject fuel into the outflow passage 221. For this reason, it is possible to increase the diameter 8d of the seal 8 of the bore 7 corresponding to the throttle valve 14 when fully closed without changing the mounting position of the injector 210 with respect to the body 5 of the body. (See Fig. 62). If the body body 5 is a resin molded product, this can be easily handled by changing the core of the molding die. For example, in the case where the injector 210 is disposed in the body 5 of the body so that the fuel injection part 212 is located near the wall surface of the bore 7, the diameter 8d of the seal part 8 of the bore 7 is increased to reach the bore 7. Although the length of the injector mounting passage is almost eliminated, there arises a problem that the design must be changed. According to this embodiment, such a problem can be solved.
  • a recess 225 is formed in the passage wall surface at the downstream end of the outflow passage 221. This prevents the fuel spray injected from the indicator 210 (see the two-dot chain line 213 in FIG. 65) from colliding with the passage wall surface of the outflow passage portion 221. Can be reduced.
  • the injector mounting portion 230 can also be formed by mounting the separately mounted injector mounting member 234 on the body 5 of the body. Togashi.
  • the device unit 3 and the engine intake device 1 of the present invention can be applied to an engine other than the engine employed in a motorcycle.
  • the device unit 3 can be installed in an air passage forming member other than the throttle body 2.
  • the device block 50 can be provided in the throttle body 2 so that the device block 50 cannot be attached or detached.
  • the device unit 3 may be any device in which the pressure sensor 54 is modularized as at least one device component in the device block 50.
  • the resin welding of the device cover 60 to the device block 50 is not limited to laser welding, so-called hot plate welding using a hot plate, so-called vibration welding using vibration, or so-called welding using a resistance wire. It can be replaced with resistance wire welding. Further, instead of the resin cover welding of the device cover 60 to the device block 50, it can be replaced with adhesive bonding, screwing, clipping, snap-fit bonding, or the like. Instead of the contact type throttle position sensor 52, a non-contact type throttle position sensor can be used.
  • the actuator of the ISC valve 51 a DC motor, a brushless motor, an electromagnetic solenoid, a temperature sensing device incorporating a thermowax, or the like can be employed instead of the step motor 108 of the above embodiment.
  • the wave washer 145 provided between the device block 50 and the sensor rotor 143 can be replaced with a disc spring, a coil spring, a rubber-like elastic material, or the like.
  • the pressure inlet 38 is not limited to two, but may be one or three or more.
  • the pressure introduction passage 187 is composed of a total of seven passage portions 261 to 267. However, in order to reduce the pulsation of the detected pressure, it is sufficient to comprise at least three passage portions. Good Preferably, it is composed of four or more passages, and more desirably, it is composed of as many stages as possible. Further, at least one of the second passage portion 262 and the sixth passage portion 266 as the throttle passage portion of the pressure introduction passage 187 can be omitted. Further, three or more throttle passage portions can be set in the pressure introduction passage 187.
  • the cross-sectional area ratio of the second passage portion 262 to the first passage portion 261 is 1Z10 or less, but the cross-sectional area ratio can be set as appropriate, and preferably 1Z5 or less. The bottom is desirable. Further, in the above-described embodiment, the force that sets the cross-sectional area ratio of the sixth passage part 266 to the fifth passage part 265 to 1Z10 or less can be set as appropriate, and preferably 1Z5 or less. It is desirable.
  • the pressure introduction passage 187 is not limited to the labyrinth structure that moves back and forth between the body body 5 side and the device block 50 side, but may be formed on the same plane.
  • the gasket fitting groove 90 is formed on the mounting surface 26a of the force body body 5 in which the gasket 180 is attached to the gasket fitting groove 90 of the mounting surface 50a of the device block 50, A gasket 180 can be mounted in the fitting groove. Further, when a sheet-like gasket 180 is used, the gasket fitting groove 90 can be omitted.
  • a dedicated retaining portion 273 can be provided separately from the force abutting portion 272 provided with the retaining portion 273 on the outer surface of the abutting portion 272 of the gasket 180. Further, the abutting portion 272 and Z or the retaining portion 273 of the gasket 180 can be omitted.
  • the cross section of the gasket 180 is formed in line symmetry with respect to the center line 271C, but may be formed in asymmetric form.
  • the concave groove 275 of the device block 50 is fitted to only the terminal support 121 of the step motor 108 of the ISC valve 51, but the two terminal support 121, 120 are fitted. It is good.
  • the positioning force formed separately is attached to the force device block 50 formed with the concave groove portions 275 and 278 as positioning portions at the same time as the resin block molding of the device block 50.
  • the device block 50 can be provided with the recessed groove portion 275 and the Z or recessed groove portion 278.
  • [0233] [Means for Solving the Problem 2] of the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention.
  • the device of the present invention The chair unit 3 and the engine intake device 1 can also be applied to engines other than the engines used in motorcycles.
  • the device unit 3 can be installed in an air passage forming member other than the throttle body 2.
  • the device block 50 can be provided in the throttle body 2 so that the device block 50 cannot be attached or detached.
  • the device unit 3 may be any device unit in which at least two device components are modularized in the device block 50.
  • the resin welding of the device cover 60 to the device block 50 is not limited to laser welding, so-called hot plate welding using a hot plate, so-called vibration welding using vibration, or so-called welding using a resistance wire. It can be replaced with resistance wire welding. Further, instead of the resin cover welding of the device cover 60 to the device block 50, it can be replaced with adhesive bonding, screwing, clipping, snap-fit bonding, or the like. Instead of the contact type throttle position sensor 52, a non-contact type throttle position sensor can be used.
  • the actuator of the ISC valve 51 a DC motor, a brushless motor, an electromagnetic solenoid, a temperature sensing device incorporating a thermo wax, or the like can be employed instead of the step motor 108 of the above-described embodiment.
  • the wave washer 145 provided between the device block 50 and the sensor rotor 143 can be replaced with a disc spring, a coil spring, a rubber-like elastic material, or the like.
  • the pressure inlet 38 is not limited to two, but may be one or three or more.
  • the outflow side passage portion communicated with the lateral hole portion 32 via the bent portion 240 is replaced with a curved shape, or instead of the straight vertical hole portion 31 of the embodiment. It can be set as the composite channel
  • the operating direction of the valve body 110 can be changed to a force or other direction that is the direction of the center line (straight line 32L) of the lateral hole portion 32.
  • the foreign material reservoir 35 of the vertical hole 31 can be omitted.
  • the outflow side passage portion (vertical hole portion 31) extends upward from the top of the bore 7 where the bore 7 is mounted. It can be extended in any direction. Further, in the above embodiment, the circumferential flow formed between the passage wall surface of the lateral hole portion 32 of the bypass passage 70 and the outer peripheral surface of the small diameter portion 238 of the valve body fitting portion 74. The road portion 242 can be omitted.
  • the device unit 3 and the engine intake device 1 of the present invention can be applied to an engine other than the engine employed in a motorcycle.
  • the device unit 3 can be installed in an air passage forming member other than the throttle body 2.
  • the device block 50 can be provided in the throttle body 2 so that the device block 50 cannot be attached or detached.
  • the device unit 3 may be any device in which at least one device component is modularized in the device block 50.
  • any device component other than the ISC solenoid 51 may be provided with one of the forces including the throttle position sensor 52, the temperature sensor 53, and the pressure sensor 54.
  • device parts other than the throttle position sensor 52, the temperature sensor 53, and the pressure sensor 54 can be provided.
  • the resin welding of the device cover 60 to the device block 50 is not limited to laser welding, but also welding using a hot plate, so-called hot plate welding, vibration welding, so-called vibration welding, and so-called welding using a resistance wire. It can be replaced with resistance wire welding. Further, instead of the resin cover welding of the device cover 60 to the device block 50, it can be replaced with adhesive bonding, screwing, clipping, snap-fit bonding, or the like. Further, instead of the contact type throttle position sensor 52, a non-contact type throttle position sensor 52 is used.
  • a DC motor, a brushless motor, an electromagnetic solenoid, a temperature sensing device incorporating a thermowax, or the like can be employed instead of the step motor 108 of the above-described embodiment.
  • the operation direction of the valve body 110 of the ISC valve 51 is the center line (straight line 32L) direction of the lateral hole portion 32 in the above-described embodiment, it can be changed to other directions.
  • the wave washer 145 provided between the device block 50 and the sensor rotor 143 can be replaced with a disc spring, a coil spring, a rubber-like elastic material, or the like.
  • the pressure inlet 38 is not limited to two, but may be one or three or more.
  • outflow passage portion 221 may be curved or It can be set as the composite-shaped channel
  • the outflow passage portion 221 has a force that extends upward from the top of the bore 7.
  • the outflow passage portion 221 can also extend the region force other than the top of the bore 7 in any direction.
  • the injector 210 can be provided in the device block 50 of the device unit 3 in which the injector 210 is provided in the body 1 of the throttle body 2.
  • the injector 210 is located at any position in the bypass passage 70 (see FIG. 6) as long as it is in the passage portion downstream of the auxiliary intake air amount control position (valve seat portion 33) by the ISC valve 51. It can arrange
  • the vertical hole portion 31 in the downstream passage portion from the valve seat portion 33 to the bore 7 can be changed to an appropriate shape instead of a straight shape.
  • the angle 31 ⁇ at which the vertical hole portion 31 of the bypass outlet hole 30 joins the bore 7 is desirably set to an arbitrary angle that is desirably set to about 30 ° (30 ⁇ 3 °).
  • the bypass passage 70 (see FIG. 6) is formed using the body body 5 and the device block 50 as the passage forming member. However, it is possible to form the binos passage using at least the body body 5 as the passage forming member. it can.

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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)

Abstract

L'invention concerne un dispositif d'amenée d'air destiné à un moteur. Dans ce dispositif, une trajectoire d'introduction de pression peut être facilement formée. Le dispositif d'amenée d'air de l'invention présente un corps de commande de gaz 2 dans lequel un papillon de gaz 14 est monté au niveau du corps 5 dans lequel un alésage 7 d'un moteur est formé, et également une unité de dispositif 3 dans laquelle un capteur de pression 54 est modularisé avec un bloc de dispositif 50 monté sur le corps 5. Dans le corps 5, est formée une ouverture d'amenée de pression 38 s'ouvrant sur l'alésage 7 et une trajectoire d'échantillonnage 39 communiquant avec l'ouverture d'amenée de pression 38 et s'ouvrant sur une surface d'installation 26 opposée au bloc de dispositif 50. Dans le bloc de dispositif 50, est formée une ouverture de détection de pression 78 dans laquelle une partie de détection de pression 54b du capteur de pression 54 est définie et s'ouvre sur une surface d'installation 50 opposée au corps 5. La surface d'installation 26a du corps 5 et la surface d'installation 50a du bloc de dispositif 50 sont assemblées pour former la trajectoire d'introduction de pression 187 offrant une communication entre la trajectoire d'échantillonnage 39 et l'ouverture de détection 78.
PCT/JP2007/061877 2006-06-29 2007-06-13 Dispositif d'amenée d'air destiné à un moteur WO2008001610A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2006179481A JP4920323B2 (ja) 2006-06-29 2006-06-29 エンジンの補助吸気量制御装置及び吸気装置
JP2006-179481 2006-06-29
JP2006-199464 2006-07-21
JP2006199464A JP4818840B2 (ja) 2006-07-21 2006-07-21 エンジンの吸気装置
JP2006-208755 2006-07-31
JP2006208755A JP2008031964A (ja) 2006-07-31 2006-07-31 エンジンの燃料噴射装置及び吸気装置

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WO2008001610A1 true WO2008001610A1 (fr) 2008-01-03

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105464815A (zh) * 2014-08-29 2016-04-06 光阳工业股份有限公司 引擎节流阀体结构
GB2533012A (en) * 2014-08-26 2016-06-08 Kwang Yang Motor Co Structure of engine throttle assembly
CN110863911A (zh) * 2018-08-27 2020-03-06 福爱电子(贵州)有限公司 一种集成式电喷汽油机进气机构

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