JP2008025480A - Suction device of engine, and device unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction device of an engine, which suction device can easily form a pressure introducing passage, and further to provide a device unit. <P>SOLUTION: An engine body 5 forming bores 7 of the engine comprises a throttle body 2 provided with a throttle valve 14, and a device unit 3 formed by modularizing a pressure sensor 54 on a device block 50 to be provided on the engine body 5. The engine body 5 is provided with a pressure intake port 38 opened to the bores 7, and a sampling passage 39 which is communicated with the pressure intake port 38 and is opened to the mounting surface 26a facing to the device block 50. The device block 50 is provided with a pressure detecting port 78 opened to a mounting surface 50a, which has the pressure detecting portion 54b of the pressure sensor 54 arranged thereon and faces to the engine body 5. A pressure introducing passage 187 communicating from the sampling passage 39 to the pressure detecting port 78 is formed by joining the mounting surface 26a of the engine body 5 and the mounting surface 50a of the device block 50. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an engine intake device and a device unit.

  An intake device for an engine includes a throttle body provided with a throttle valve for opening and closing the intake passage for the body main body forming the intake passage of the engine, and at least one device component for a device block provided in the body main body There is a device provided with a device unit formed by modularizing (see, for example, Patent Document 1). FIG. 52 is a cross-sectional view showing an intake device according to Patent Document 1.

  As shown in FIG. 52, the intake device 400 of Patent Document 1 includes a pressure sensor 432 that detects the 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 main body 420 of the throttle body 402. Two sampling passages 413 communicating with the intake passage 440 are formed in the body main body 420. Further, on the mating surface of the device block 421 facing the body main body 420, a 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 detected by the pressure sensor 432. A partition wall 480 is formed that partitions the pressure detection region 472, the pressure receiving region 470, and the pressure detection region 472 so as to communicate with each other through a gap. Further, the device block 421 is provided with a crank-shaped through hole 498 that leads from the pressure detection region 472 to the pressure sensor 432 disposed on the opposite side, that is, on the side opposite to the mating surface (upper side in FIG. 52).

International Publication Number WO 2005/116429

  According to the engine intake device described in Patent Document 1, 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 crank-shaped through hole 498 must be formed in the device block 421 itself, 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 that improvement is desired.

  The problem 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 above-described problems can be solved by an engine intake device and a device unit having the structure described in the claims.
In other words, according to the engine intake device of the first aspect, the pressure introducing passage communicating from the sampling passage to the pressure detecting port is formed by joining the mating surface of the body 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 cost reduction can be realized.

  Further, according to the engine intake device of the second aspect, the passage groove provided in the mating surface of the body main body has a closed cross-section by joining the mating surface of the device block, so that at least one of the pressure introduction passages is formed. The part can be easily formed.

  According to the engine intake device of the third aspect, 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 body, so that at least one of the pressure introduction passages is formed. The part can be easily formed.

  According to the engine intake device of the fourth aspect, the sampling passage groove and the pressure detection passage groove provided on the mating surface of the device block, and the communication formed on the mating surface of the body main body. The passage groove is closed by the joining of the mating surface of the body body and the mating surface of the device block. Thereby, a series of pressure introduction passages from the sampling passage to the pressure detection port can be easily formed.

  According to the engine intake device described in claim 5, the pressure introduction passage is constituted by three or more passage portions having different passage cross-sectional areas and / or volumes. Thereby, the pulsation of the detected pressure due to the turbulence of the intake air flow by the throttle valve can be reduced, and the detection accuracy of the intake air pressure by the pressure sensor can be improved. This can be said to be effective in reducing the size of the intake device by making it possible to place the pressure inlet close to the throttle valve.

  According to the engine intake device of the sixth aspect, the throttle passage portion for narrowing the passage cross-sectional area is formed in the pressure introduction passage. Thereby, the pulsation of the detected pressure due to the turbulence of the intake air flow by the throttle valve can be reduced, and the detection accuracy of the intake air pressure by the pressure sensor can be improved.

  According to the engine intake device of the seventh aspect, the pressure introduction passage has a labyrinth structure, thereby reducing the pulsation of the detected pressure due to the disturbance of the intake flow caused by the throttle valve, and detecting the intake pressure by the pressure sensor. Accuracy can be improved.

  According to the engine intake device of the eighth aspect, the pressure introduction passage can be sealed by the seal member interposed between the mating surface of the body body and the mating surface of the device block. Thereby, the pressure leakage of the pressure introduction passage can be prevented or reduced, and the detection accuracy of the intake pressure by the pressure sensor can be improved.

  According to the engine intake device of the ninth aspect, 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 body.

  According to the engine intake device of the tenth aspect, when the annular seal portion of the seal member is mounted on the annular groove portion of the seal member mounting groove, the seal member is mounted on the seal member mounting groove. By using the reference, the seal member can be easily mounted in the seal member mounting groove.

  According to the engine intake device of the eleventh aspect, the annular seal portion surrounding the sampling passage groove and the annular seal portion surrounding the pressure detection passage groove are used for communication of the body body. It continues with the common seal part which faces the opening surface of a channel groove. Therefore, it is possible to improve the installation of the annular seal portions that are continuous with each other of the seal member.

  According to the engine intake device of the twelfth aspect, the seal member can be easily mounted in the seal member mounting groove by fitting the seal member loosely in the seal member mounting groove. be able to.

  According to the engine intake device of the thirteenth aspect, the retaining portion provided in the seal member is elastically brought into contact with the groove wall surface in the seal member mounting groove, thereby sealing the seal member in the seal member mounting groove. The member can be retained.

  According to the engine intake device of claim 14, the abutment portion provided on the seal member abuts the groove wall surface of the seal member mounting groove, whereby the mating surface of the body main body and the mating surface of the device block It is possible to prevent or reduce the buckling of the seal member due to the joining with the. Thereby, the sealing performance of the sealing member can be improved.

  According to the engine intake device of the fifteenth aspect, since the cross section of the seal member is formed symmetrically with respect to the center line, the sealing performance of the seal member can be improved.

  According to the engine intake device of the sixteenth aspect, 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. For this reason, it is possible to prevent or reduce the occurrence of terminal vibration of the device component due to vehicle vibration or the like and disconnection due to the vibration.

  According to the engine intake device of the seventeenth aspect, positioning is easily performed by fitting a terminal or terminal support portion of the device component to the concave groove portion which is a positioning portion formed in the device block. be able to.

  Further, according to the engine intake device of the eighteenth aspect, the cost can be reduced by forming the concave groove portion simultaneously with the resin molding of the device block.

  According to the engine intake device of the nineteenth aspect, an idle control device that controls the amount of auxiliary air that flows through the auxiliary air passage that bypasses the throttle valve can be provided as a device component other than the pressure sensor.

  According to the engine intake device of the twentieth aspect, the throttle position sensor for detecting the opening degree of the throttle valve can be provided as a device component other than the pressure sensor.

  According to the engine intake device of the twenty-first aspect, the temperature sensor for detecting the intake air temperature can be provided as a device component other than the pressure sensor.

  According to the device unit of the twenty-second aspect, it is possible to provide a device unit used for an intake device of an engine that can easily form a pressure introduction passage.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the following examples.

  An embodiment of the present invention will be described with reference to the drawings. In this embodiment, an engine intake device used in a motorcycle such as a motorcycle or a moped bicycle will be described. 1 is a side view showing an intake system of an engine, FIG. 2 is a rear view, FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1, and FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. . For the engine intake device, the side to which an air cleaner (not shown) is connected (right side in FIG. 1) is the front side, and the side to which an intake manifold (not shown) is connected (left side in FIG. 1). Will be described as the rear side. In addition, the vertical direction of the intake device 1 of the engine is the same as the vertical direction when mounted on the motorcycle.

As shown in FIG. 2, the engine intake device 1 includes a throttle body 2 and a device unit 3 that is detachably provided on one side (right side in FIG. 2) of the throttle body 2 (see FIG. 2). 1). For convenience of explanation, the throttle body 2 will be explained, and then the device unit 3 will be explained.
As shown in FIG. 3, the throttle body 2 includes a body body 5 that forms the main body. The body 5 is made of resin, for example, and has a substantially hollow cylindrical bore wall 6 that penetrates in the front-rear direction (the front and back direction in FIG. 3). A hollow portion in the bore wall portion 6 is a bore 7. An air cleaner (not shown) is connected to the front end portion (left end portion in FIG. 4) of the bore wall portion 6, and an intake manifold (not shown) is connected to the rear end side (right end side in FIG. 4) of the bore wall portion 6. .) Are connected. Accordingly, the intake air flowing from the air cleaner flows to the intake manifold through the bore 7. The bore 7 corresponds to an “intake passage” in the present specification. Further, the engine may be directly connected to the rear end side of the bore wall portion 6 instead of the intake manifold.

  As shown in FIG. 3, 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 ends of the throttle shaft 9 are rotatably supported in a pair of left and right bearing bosses 10 and 11 formed integrally with the bore wall 6. Between the throttle shaft 9 and each bearing boss | hub part 10 and 11, the rubber-made sealing material 12 is interposed, respectively. Each sealing material 12 elastically seals between the throttle shaft 9 and the bearing boss portions 10 and 11.

  As shown in FIG. 4, a substantially disc-shaped butterfly throttle valve 14 that opens and closes the bore 7 is fastened by a screw 15 on the throttle shaft 9. When the throttle valve 14 rotates together with the throttle shaft 9, the amount of intake air flowing through the bore 7 is controlled. Note that the throttle valve 14 is in the closed state shown by the solid line 14 in FIG. 4, and rotates in the clockwise direction in FIG. 4 from the closed state (see the arrow “O” direction in FIG. 4). As a result, an open state is obtained (see the two-dot chain line 14 in FIG. 4). In addition, 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). .

  As shown in FIG. 3, a throttle lever 17 is integrated with the right end portion (right end portion in FIG. 3) of the throttle shaft 9 by insert molding. A return spring 18 made of a coil spring 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 and wound with an accelerator wire connected to a throttle operating device (not shown).

  Prior to fastening of the throttle valve 14, the throttle shaft 9 is inserted into the bearing bosses 10 and 11 of the bore wall portion 6 from the right to the left. After the washer 19 and the 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 surface 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). FIG. 5 is a side view showing the device unit mounting side of the throttle body. Further, a sensor rotor 143 of a throttle position sensor 52 provided in the device unit 3 to be described later can be connected to the sensor rotor connecting portion 24.

  As shown in FIG. 3, the bore wall 6 is integrally formed with a flange-shaped unit mounting portion 26 that is 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 formed of an outer end surface that is flush with the opening end surface of the left bearing boss portion 10 and 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 rotational axis of the throttle valve 14. The mounting surface 26a of the unit mounting portion 26 corresponds to “a mating surface facing the device block” and “a mating surface of the body body” in the present specification.

  As shown in FIG. 4, a bypass inlet hole 28 and a bypass outlet hole 30 are formed in the unit mounting portion 26. The bypass inlet hole 28 is formed by a straight circular hole that passes through 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 on the mounting surface 26a of the unit mounting portion 26 (see FIG. 5).

The bypass outlet hole 30 is shown in FIGS. 6 and 7 in addition to FIG. 4. 6 is a plan sectional view showing the bypass passage, and FIG. 7 is a sectional view taken along the line VII-VII in FIG.
As shown in FIG. 7, the bypass outlet hole 30 has a vertical hole portion 31 extending in the vertical direction at the upper portion of the unit mounting portion 26, and leftward from the upper end portion of the vertical hole portion (rightward 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 of the vertical hole portion 31 is opened on the upper side portion of the passage wall surface of the bore 7 on the downstream side of the throttle valve 14 in the fully closed state. Thus, the vertical hole portion 31 is formed by a bottomed straight circular hole extending along a straight line 31L having an upper portion inclined forward and a lower portion inclined backward (see FIG. 4).

Further, as shown in FIG. 7, the horizontal hole portion 32 is a straight stepped circular hole extending along a straight line 32 </ b> L perpendicular to the straight line 31 </ b> L of the vertical hole portion 31 near the upper end portion of the vertical hole portion 31. It is formed by. The horizontal hole portion 32 includes a large-diameter side hole portion 32 a that opens to the mounting surface 26 a of the unit mounting portion 26, and a small-diameter side hole portion 32 b that communicates the large-diameter side hole portion 32 a and the vertical hole portion 31. Have. The edge of the small-diameter hole 32b on the large-diameter hole 32a side has a valve seat portion 33 corresponding to a valve body 110 of an idle speed control valve (hereinafter referred to as “ISC valve”) 51 described later. It has become. Therefore, the hole bottom portion, which is the upper end portion of the vertical hole portion 31, is a foreign matter reservoir portion 35 that extends upward from the hole portion 32b on the small diameter side. As a result, foreign matter such as deposits contained in the exhaust gas blown back into the vertical hole portion 31 from the engine side can be received and stored in the foreign matter storage portion 35 formed at the end of the vertical hole portion 31, and the horizontal hole portion can be stored. The backflow to the upstream side of 32 can be prevented or reduced. The opening end of the large-diameter hole 32a in the horizontal hole 32 corresponds to the “passage opening” in this specification. Further, a 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. For this reason, the hole 32a on the large diameter side in the lateral hole 32 is referred to as a “valve fitting hole”.
Further, as shown in FIG. 5, a bypass passage groove that communicates the bypass inlet hole 28 and the bypass outlet hole 30 (specifically, the large-diameter side hole 32a) on the mounting surface 26a of the unit mounting portion 26. 37 is formed (see FIG. 6).

  As shown in FIG. 4, a pair of upper and lower pressure inlets 38 made of straight circular holes are formed on the passage wall surface of the bore 7. Both pressure inlets 38 are opened at a position that avoids the influence of the vortex of the intake flow generated near the outer peripheral portion on the downstream side of the throttle valve 14 when the valve is opened. The “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” is, for example, the throttle valve 14 in the fully opened state (see the two-dot chain line 14 in FIG. 4). The peripheral portion on the downstream side of the downstream end portion 14a corresponds. Furthermore, both the pressure inlets 38 are opened at a position upstream of the flow of intake air (auxiliary air) flowing out from the vertical hole portion 31 of the bypass outlet hole 30 and avoiding the influence of the intake air. Further, the pressure inlets 38 are positions where 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 is avoided, and are discharged from the vertical hole portion 31 of the bypass outlet hole 30. Among the positions on the upstream side of the flow of the intake air (auxiliary air) and avoiding the influence of the intake air, the openings are opened closest to the upstream side. Of the two pressure inlets 38, a pressure inlet 38 (reference numeral (A)) located on the ground side (for example, the lower side in FIG. 4) with respect to the top-to-bottom direction when the throttle body 2 is mounted on a two-wheeled vehicle. ) Serves as a discharge port for discharging foreign matter (for example, water) flowing into a sampling passage 39 described later into the bore 7.

  As shown in FIG. 4, the unit mounting portion 26 has a sampling hole 39 in the form of 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). Is formed (see FIG. 5). An upper pressure inlet 38 communicates with the upper end portion of the sampling passage 39, and a lower pressure inlet 38 communicates with the lower end portion thereof. Further, as shown in FIG. 5, an elongated communication groove 40 extending from near the upper side of the sampling passage 39 to the upstream side (rightward in FIG. 5) is formed on the mounting surface 26a of the unit mounting portion 26. Yes. The communication groove 40 corresponds to a “passage groove” and a “communication passage groove” in this specification.

  As shown in FIG. 4, the bore wall portion 6 and the unit mounting portion 26 are provided with an intake air temperature detection hole 42 formed of a straight circular hole penetrating in the left-right direction (the front and back direction in FIG. 4). Yes. 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 on the mounting surface 26a of the unit mounting portion 26 (see FIG. 5).

  As shown in FIG. 5, an appropriate number of fastening boss portions 44 (three in total, one on the upper side and two on the lower side on the lower side) are provided on the outer peripheral portion of the unit mounting portion 26. 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 unit 3 to be described later can be fastened to the screw hole 44a.

Next, the device unit 3 detachably provided on the throttle body 2 will be described. FIG. 11 is an exploded perspective view showing component parts of the device unit.
As shown in FIG. 11, the device unit 3 has an ISC valve 51, a throttle position sensor 52, a temperature sensor 53, and a pressure sensor as device components (specifically, device components related to the engine) with respect to the device block 50. 54 is modularized together with the wiring board 55. For the convenience of explanation, the device unit 3 will be described with the attachment side (lower side in FIG. 11) to the throttle body 2 as the front side and the device cover 60 side (upper side in FIG. 11) to be described later as the rear side.

  Therefore, 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, as will be described later, on the side opposite to the throttle body (in FIG. 11). The throttle valve 14 is assembled from the upper side (left side in FIG. 3) along the rotational axis direction of the throttle valve 14 (vertical direction in FIG. 11, horizontal direction in FIG. 3). The attachment side (lower side in FIG. 11) with respect to the throttle body 2 corresponds to the “throttle body side” in the present specification, and the device cover 60 side (upper side in FIG. 11) corresponds to the “reverse side” in the present specification. Corresponds to the "Throttle body side".

First, the device block 50 will be described. 14 is a front view showing the device block, and FIG. 15 is a rear view of the device block.
As shown in FIG. 11, the device block 50 is made of resin, for example, and is formed in a substantially block shape. As shown in FIG. 14, 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. Further, the mounting surface 50a of the device block 50 corresponds to “a mating surface facing the body” and “a device block mating surface” in the present specification.

  Further, as shown in FIG. 15, 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 resin welding of a device cover 60 (described later) to the opening end of the peripheral wall portion 57.

  As shown in FIG. 11, an attachment boss portion 62 corresponding to each fastening boss portion 44 (see FIG. 5) of the unit mounting portion 26 is formed on the outer peripheral portion of the device block 50. Each mounting boss 62 has a bolt insertion hole 62a (see FIGS. 14 and 15). The bolt insertion hole 62a is formed so that the fastening bolt 45 (see FIG. 2) can be inserted. By fastening the fastening bolt 45 to the screw hole 44a of each fastening boss portion 44 through the bolt insertion hole 62a of each mounting boss portion 62, the device block 50 can be detachably provided on the throttle body 2. (See FIGS. 1 to 3).

  FIG. 16 is an exploded cross-sectional view showing the periphery of the throttle position sensor. As shown in FIG. 16, 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). On the inner peripheral surface of the central portion of the rotor fitting hole portion 64, a flange portion 65 that projects in an annular shape is formed. In the rotor fitting hole 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). Further, a connecting tube portion 66 having a cylindrical shape that surrounds the rotor fitting hole portion 64 protrudes 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).

  As shown in FIG. 14, 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). As shown in FIG. 6, the bypass passage groove 68 forms a closed section in cooperation with the bypass passage groove 37 when the mounting surface 50 a of the device block 50 is brought into surface contact with the mounting surface 26 a of the unit mounting portion 26. A bypass passage 70 is formed. The bypass passage 70 forms a series of “auxiliary air passages” that bypass the throttle valve 14 by communicating with the bypass inlet hole 28 and the bypass outlet hole 30.

  FIG. 17 is an exploded sectional view showing the periphery of the ISC valve and the pressure sensor. As shown in FIG. 17, 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 is formed in the front end portion of the motor fitting portion 72 to reduce the diameter. The motor fitting portion 72 is formed such 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 corresponds to an “actuator fitting portion” in this specification.

  On the mounting surface 50 a of the device block 50, a valve body fitting portion 74 that surrounds the motor fitting portion 72 and is continuous with the stepped portion 73 is formed. In addition, 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. In the valve body fitting portion 74, a valve body 110 and a valve spring 138 of the ISC valve 51 described later can be fitted from behind (upper in FIG. 17). Moreover, the valve body fitting part 74 is formed so that fitting is possible in the valve body fitting part hole 32a of the bypass outlet hole 30 of the said unit mounting part 26 (refer FIG.6 and FIG.7). Further, on the inner peripheral surface of the valve body fitting portion 74, an appropriate number of positioning convex portions 76 (one is shown in FIG. 17) 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. Furthermore, a pressure detection port 78 having a circular hole shape 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. In the pressure sensor fitting hole 77, a sensor main body 54a of a pressure sensor 54, which will be described later, can be fitted from behind (upward in FIG. 17). Further, the pressure detection part 54 b of the pressure sensor 54 can be fitted into the pressure detection port 78.

  FIG. 18 is an exploded cross-sectional view showing the periphery of the temperature sensor. As shown in FIG. 18, 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 protrudes 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 portion 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. Further, the detection cylinder portion 81 is formed so as to be able to fit 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. 14, on the mounting surface 50a of the device block 50, a first connecting groove 84, a second connecting groove 83, and a second connecting groove located near the lower part of the valve body fitting portion 74. A vertically elongated second throttle groove 85 communicating with the pressure detection port 78 and a vertically elongated relay groove 87 communicating with the first throttle groove 86 below the first connecting groove 84 are formed. Has been. The second communication 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 communication groove 40 (see FIG. 5) on the mounting surface 26a of the unit mounting portion 26. The first connecting groove 84 is formed so as to be able to be aligned with the rear end (left end in FIG. 5) of the connecting groove 40 (see FIG. 5). The relay groove portion 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 portion 84, the second communication groove portion 83, the first throttle groove portion 86, the second throttle groove portion 85, and the relay groove portion 87 each correspond to a “passage groove” in the present specification. Further, the first connecting groove 84, the first throttle groove 86, and the relay groove 87 constitute a “sampling passage groove” in the present specification. The second communication groove 83 and the second throttle groove 85 constitute a “pressure detection passage groove” in the present specification. Further, these groove portions 83, 84, 85, 86, 87, the communication groove 40, and the pressure detection port 78 are well represented in FIG. FIG. 35 is a perspective view showing the mounting surface of the unit mounting portion of the body body and the mounting surface of the device block in a spread state.

As shown in FIG. 14, 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 groove portions 91 to 95 forming a ring 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 that surrounds the bypass passage groove 68 and the valve body fitting portion 74 and shares 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 the right side portion of the first groove portion 91 and the lower side of the second groove portion 91. It is formed in an annular shape that shares the central part of the part. The fifth groove portion 95 surrounds the first communication 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 right side of the fourth groove portion 94. It is formed in an annular shape that shares parts. The gasket 180 fitted in the gasket fitting groove 90 will be described later. The gasket fitting groove 90 corresponds to a “sealing member mounting groove” in this specification.

  As shown in FIG. 11, a connector 97 is integrally formed on the left side of the device block 50 by resin molding. The connector portion 97 is a collection of connector portions relating to each device component, that is, the ISC valve 51, the throttle position sensor 52, the temperature sensor 53, and the pressure sensor 54. 12 is a cross-sectional view showing the peripheral portion of the throttle position sensor of the device unit, and FIG. 13 is a cross-sectional view showing the peripheral portion of the connector portion of the device block.

  As shown in FIG. 13, a predetermined number (two are shown in FIG. 13) of terminals 98 are arranged in the connector portion 97 by insert molding. As these terminals 98, there are two each for 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 (grounding) correspond. The terminal portions on the connector side of these terminals 98 protrude leftward in a state of being parallel to each other. Further, terminal portions 98 (reference numerals, (a)) on the side opposite to the connector of each of the four terminals 98 for power supply, ground, throttle opening output, and intake pressure output are included in the device block 50. It is bent toward the back side (upward in FIG. 13). As shown in FIG. 15, the terminal portions 98 (a) are arranged in two rows on the left and right above the temperature sensor insertion hole 80. In addition, the terminal portions (not shown) of a total of four terminals 98 for the A phase and B phase applied to the step motor 108 to be described later are left and right on the bottom surface in the housing recess 58 of the device block 50. The two terminals are connected to two upper and lower terminal plates 99a and 99b arranged in a stepped manner (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). Further, the terminal portions (not shown) of the two terminals 98 for grounding and intake air temperature output for intake air temperature output are the bottom surfaces in the housing recess 58 of the device block 50 as shown in FIG. It is connected to two upper and lower terminal boards 100a, 100b arranged on the top. These terminal plates 100a and 100b are adjacent to the temperature sensor insertion hole 80 in the vertical direction.

  The connector 97 is formed such that an external connector (not shown) that is electrically connected to the control means 102 (see FIG. 1) that is an electronic control unit (ECU) can be connected by insertion. The control means 102 includes output signals from various detection means such as device parts, that is, an ISC valve 51, a throttle position sensor 52, a temperature sensor 53, a pressure sensor 54, other sensors, switches and the like (not shown). Is entered. Further, the control means 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 means.

  As shown in FIG. 15, a pair of upper and lower columnar reference pins 104 protrude on the bottom surface in the housing recess 58 of the device block 50. The upper reference pin 104 is disposed at the upper right of the motor fitting portion 72, and the lower reference pin 104 is disposed at the lower left corner of the housing recess 58. Further, as shown in FIG. 16, both reference pins 104 are formed in a stepped pin shape having a stepped surface 104a having a base portion side as a large diameter portion and a distal end side as a small diameter portion. The tip of the small diameter portion is formed in a tapered shape that tapers.

  As shown in FIG. 15, a pair of upper and lower cylindrical mounting pins 106 project on the bottom surface in the housing recess 58 of the device block 50. The upper mounting pin 106 is disposed at the upper right corner of the accommodating recess 58, and the lower mounting pin 106 is disposed adjacent to the lower left of the motor fitting portion 72. Further, as shown in FIG. 16, both mounting pins 106 are formed in a stepped pin shape having a stepped surface 106 a 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. Further, the stepped surface 106 a of the mounting pin 106 and the stepped surface 104 a of the reference pin 104 are formed on one plane perpendicular to the axis 64 </ b> L of the rotor fitting hole 64. Further, a support surface 107 is formed in the empty space on the inner peripheral side of the peripheral wall portion 57 so as to be flush with the two stepped surfaces 104a and 106a. The same plane 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.

  Next, the ISC valve 51 incorporated in the housing recess 58 of the device block 50 will be described. As shown in FIG. 17, the ISC valve 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. Yes. A bipolar step motor is used as the step motor 108 in this embodiment. The step motor 108 corresponds to an “actuator” in this specification. FIG. 19 is a sectional view showing the ISC valve, and FIG. 20 is a front view of the ISC valve as viewed from the front end side of the valve body.

  As shown in FIG. 19, 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. The stator 113 includes a resin bobbin 115. The bobbin 115 is formed by insert-molding four yokes 116 and four terminals 117 (see FIG. 20). Moreover, the yokes 116 are arranged in a laminated form in the axial direction as a set of two. The bobbin 115 includes a cover 118 that covers the yoke 116, an end plate 119 formed in a flange shape on the opening side of the motor housing 112, and a pair of terminals that protrude parallel to the outer peripheral surface of the end plate 119. Support portions 120 and 121 (see FIG. 17) are integrally formed. In each of the terminal support portions 120 and 121, two base portions of the terminals 117 are embedded and supported (see FIG. 11). Each terminal 117 is drawn out from each terminal support 120, 121 in a stepped manner. Also, as shown in FIG. 20, out of the total four terminals 117 of the step motor 108, the two terminals 117 for A phase are labeled with (S1) and (S2), and 2 for B phase. Reference numerals (S3) and (S4) are attached to the terminal 117 of the book.

  As shown in FIG. 19, a coil wire 122 is wound in two stages on the outer periphery of the bobbin 115. 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 opening end surface of the motor housing 112 is superposed on the end plate portion 119 of the bobbin 115. A pair of dry bearings 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 dry bearings 124 and 125 are disposed 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. The 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. Further, 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 the convex portion 128. The magnet 130 is provided so as to surround the shaft portion between the two dry bearings 124 and 125 in the rotor shaft 127. 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 the magnetic pole teeth of the yoke 116 are alternately magnetized. ing. Further, a screw shaft portion 129 is formed at the tip end portion of the rotor shaft 127 projecting out of 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 133a that is formed at a distal end portion (lower end portion in FIG. 19) of the cylindrical portion 132. It has a columnar valve tip part 133 and a flange part 134 projecting annularly on the outer peripheral part of the base end part (upper end part in FIG. 19) of the cylindrical part 132. Further, as shown in FIG. 20, an appropriate number (four in FIG. 20) of positioning grooves 134a are formed on the outer peripheral surface of the flange portion 134 at equal intervals, that is, at 90 ° intervals.

  As shown in FIG. 19, 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 half in FIG. 19). Is formed in a stepped hole shape having a small diameter hole portion. A nut member 136 having a screw hole is integrated into the large-diameter hole portion by press-fitting (for example, hot press-fitting). A screw shaft portion 129 of the rotor shaft 127 is screwed into the nut member 136 (specifically, a screw hole). Further, 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. Accordingly, the rotation of the motor rotor 114 (forward rotation and reverse rotation) 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). It has become. Further, when the valve body 110 is retracted, before the valve body 110 comes into contact with the motor housing 112, the convex portion 128 of the rotor shaft 127 makes point contact with the bottom surface in the tubular portion 132 of the valve body 110, thereby The backward movement of the valve body 110 is restricted.

  21 is a side view showing a device cover mounting side of a device block on which an ISC valve and a temperature sensor are mounted, and FIG. 22 is a cross-sectional view showing a mounting state of the ISC valve on the device block. As shown in FIG. 22, the ISC valve 51 is mounted in the housing recess 58 of the device block 50. Specifically, 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. At this time, a valve spring 138 made of a conical 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. The valve spring 138 has an end on the small diameter side in contact with the flange portion 134 of the valve body 110 and an end on the large diameter side in contact with the flange portion 75 of the valve body fitting portion 74. The 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 valve spring 138 elastically 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) of the rotor shaft 127 on the cover plate 123 side is held in a state of point contact with the cover plate 123.

  Further, the positioning groove 134a (see FIG. 17) of the flange portion 134 of the valve body 110 is slidably fitted to the positioning convex portion 76 (see FIG. 17) in the valve body fitting portion 74 of the device block 50. Combined. 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 (twice in this embodiment), the valve body 110 can be easily fitted into the valve body fitting portion 74 of the device block 50. Can do. 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. .

  As shown in FIG. 22, when the step motor 108 is fitted into the motor fitting portion 72, each terminal 117 of the step motor 108 is placed on the bottom surface in the housing recess 58 of the device block 50. They are placed on the terminal boards 99a and 99b, respectively (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 being detached 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.

Next, 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 mainly composed of a thermistor 140. FIG. 23 is a cross-sectional view showing a mounted state of the temperature sensor.
As shown in FIG. 23, the thermistor 140 is inserted into the detection cylinder portion 81 through the temperature sensor insertion hole 80 of the device block 50. Accordingly, the terminal portions 141a of the two terminals 141 of the thermistor 140 are placed on the terminal plates 100a and 100b disposed on the bottom surface in the housing recess 58 of the device block 50 (FIG. 21). reference.). In this state, the terminal portion 141a of each terminal 141 is connected to each terminal plate 100a, 100b by resistance welding or the like. A 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.

  Next, the throttle position sensor 52 incorporated in the housing recess 58 of the device block 50 will be described. As shown in FIG. 16, 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 is a substantially disc-shaped rotor main portion 143a facing the wiring board 55, and a substantially cylindrical shape that protrudes to the device block 50 side (lower side in FIG. 16) of the rotor main portion 143a. And a support shaft portion 143c protruding on the wiring board 55 side (upper side in FIG. 16) of the rotor main portion 143a is 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 leaf spring 144 elastically holds the sensor rotor 143 in the radial direction on 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. Further, the support shaft portion 143 c is loosely fitted into a support shaft portion insertion 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.

  As shown in FIG. 12, there is a wave washer (wave spring, wave spring washer) between the annular facing surfaces between the flange portion 65 of the rotor fitting hole portion 64 and the rotor main portion 143a of the sensor rotor 143. 145) is interposed. The wave washer 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.

  A brush 147 which is a slider that can slide on resistor parts 150 and 151 (described later) of the wiring board 55 is provided on the surface (the upper surface in FIG. 12) of the rotor main part 143a on the device cover 60 side. Is provided. The throttle position sensor 52 is a contact type throttle position in which the brush 147 slides on the resistor portions 150 and 151 of the wiring board 55 to convert it into an electrical signal and output the signal as the sensor rotor 143 rotates. A sensor 52 is provided.

Next, the wiring board 55 incorporated in the housing recess 58 of the device block 50 will be described. 24 is a side view showing the device cover mounting side of the device block on which the wiring board is mounted, FIG. 25 is a front view showing the wiring board, and FIG. 26 is a back view.
As shown in FIG. 24, 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). As shown in FIG. 25, a predetermined wiring pattern 148 is printed on the surface of the wiring board 55. Further, as shown in FIG. 26, a predetermined wiring pattern 149 is printed on the back surface of the wiring board 55. On the back surface of the wiring board 55, both internal and external resistor portions 150 and 151 having a fan shape corresponding to the brush 147 of the sensor rotor 143 are formed, and a pressure sensor 54 (described later) is mounted. .

  As shown in FIGS. 25 and 26, the wiring substrate 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 as to 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.

  As shown in FIGS. 25 and 26, 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 pins 106 (see FIGS. 15 and 16).

As shown in FIG. 25, a total of four terminal insertion holes 157 are formed in the wiring board 55 in two rows on the left and right. These terminal insertion 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 housing recess 58 of the device block 50, and the terminals The portion 98 (a) is formed so as to be fitted (see FIG. 15).
Further, as shown in FIG. 25, a support shaft insertion hole 158 is formed at the center of the wiring board 55. The support shaft portion insertion hole 158 corresponds to the support shaft portion 143c of the sensor rotor 143, and is formed so as to be loosely fitted to the support shaft portion 143c (see FIG. 16).

As shown in FIG. 26, 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 detector 54b that protrudes on the sensor main body 54a (front side in FIG. 26). The sensor 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. Moreover, the pressure detection part 54b respond | corresponds to the pressure detection port 78 of the device block 50, and is formed so that fitting to the pressure detection port 78 is possible (refer FIG. 17).
Further, as shown in FIG. 25, the wiring board 55 is formed with a long and narrow isolation hole 160 that crosses between the resistor portions 150 and 151 and a total of four terminal insertion holes 157.

  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, whereby the wiring board 55 is parallel to the plate surface, that is, the radial direction and the rotation direction. (See FIG. 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. Further, the edge portions of both reference holes 153 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 FIG. 12).

  The wiring board 55 is also supported on the reference plane DL of the housing recess 58 by bringing the outer periphery of the wiring board 55 into contact with the support surface 107 (see FIG. 16) of the housing recess 58 (see FIG. 16). 12). Further, the small-diameter portions on the distal end side of both mounting pins 106 of the device block 50 are relatively fitted in both mounting holes 155, and the edge portions of both mounting holes 155 are stepped surfaces 106a ( 16), 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 quickly positioned at a predetermined position 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.

Terminal portions 98 (a) of a total of four terminals 98 projecting on the bottom surfaces in the receiving recesses 58 of the device block 50 in the terminal insertion holes 157 (see FIG. 25) of the wiring board 55. 24 is inserted (see FIG. 24). Then, the conductive portions (not shown) of the wiring patterns 148 and 149 (see FIGS. 25 and 26) around each terminal insertion hole 157 of the wiring board 55 and the terminal portion 98 (a) of each terminal 98 are soldered. Connected by. In addition, the code | symbol 164 is attached | subjected to the connection part by soldering (refer FIG.13 and FIG.24).
Further, the support shaft portion 143c of the sensor rotor 143 is loosely fitted in the support shaft portion insertion hole 158 of the wiring board 55 (see FIGS. 12 and 13).

  FIG. 27 is a cross-sectional view showing a mounting state of the pressure sensor on the device block. As shown in FIG. 27, the sensor body 54 a of the pressure sensor 54 is fitted into the pressure sensor fitting hole 77 of the device block 50 as the wiring board 55 is mounted in the housing recess 58 of the device block 50. At the same time, the pressure detection portion 54 b is fitted into the pressure detection port 78 of the device block 50. A sealing material (not shown) for sealing between the sensor main body 54a of the pressure sensor 54 and the pressure sensor fitting hole 77 is appropriately interposed.

  Further, as shown in FIG. 12, the enormous portion 162 is formed by crushing the tip of the mounting pin 106 protruding on the surface of the wiring board 55 by heat caulking. As a result, the wiring board 55 is prevented from coming off from the device block 50.

  Next, the device cover 60 that covers the device components modularized in the device block 50 will be described. As shown in FIG. 11, 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. FIG. 28 is a rear view showing the device cover.

  As shown in FIG. 28, 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 as to be fitted to the small diameter portion on the tip side of the mounting pin 106 (see FIG. 16). 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 as to be able to support the support shaft portion 143c (see FIG. 16).

  On the back surface of the device cover 60, a pair of upper and lower caulking portion relief recesses 172 are formed (see FIG. 28). Both relief recesses 172 correspond to both mounting pins 106 of the device block 50, and are formed so as to be able to accommodate enormous portions 162 (see FIG. 12) of the mounting pins 106 (see FIG. 16). A terminal escape recess 173 is 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 escape recess 174 is formed on the back surface of the device cover 60 (see FIG. 13). The escape 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).

  As shown in FIGS. 12 and 13, the device cover 60 is placed on the device block 50 so as to close the open end surface of the receiving recess 58. 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 recesses 168 of the device cover 60, so that the device cover 60 is parallel to the plate surface, that is, radial. Positioned in the direction and rotational direction. Further, the sensor rotor 143 is rotatably supported on the device cover 60 by relatively fitting the support shaft portion 143c of the sensor rotor 143 into the bearing recess 170 of the device cover 60.

  Further, the enormous portions 162 of the both mounting pins 106 of the device block 50 are accommodated in the escape recesses 172 for both caulking portions of the device cover 60 (see FIG. 12). Further, in the terminal escape recess 173 of the device cover 60, a connection part 164 is accommodated by soldering the wiring board 55 and the terminal part 98 (a) of each terminal 98 (see FIG. 13). Further, the rear portion of the motor housing 112 of the step motor 108 is accommodated in the motor relief recess 174 of the device cover 60 (see FIGS. 6 and 7). And the outer peripheral part of the device cover 60 is joined to the peripheral wall part 57 of the device block 50 by resin welding (refer FIG.12 and FIG.13).

FIG. 29 is a side view showing a throttle body mounting side of a device block equipped with a gasket. As shown in FIG. 29, a gasket 180 is fitted into the gasket fitting groove 90 (see FIG. 14) of the device block 50. FIG. 30 is a surface view showing the gasket.
As shown in FIG. 30, 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 is formed in an irregular mesh shape in which a total of five first to fifth seal portions 181 to 185 having a ring shape share a part with each other. As shown in FIG. 29, the first seal portion 181 is formed so as to be fitted in the first groove portion 91 of the gasket fitting groove 90. The first seal portion 181 serves as a reference for mounting the gasket 180 on the gasket fitting groove 90 when mounted on the first groove portion 91 of the device block 50. The gasket 180 corresponds to a “seal member” in the present specification. The first seal portion 181 corresponds to the “annular seal portion” in this specification.

  Further, 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 in the third groove portion 93 of the gasket fitting groove 90. Further, 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).

Further, 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).
The 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.

  Next, a procedure for attaching the device unit 3 to the throttle body 2 will be described. That is, as shown in FIG. 2, 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). From this state, the mounting surface 50 a of the device block 50 of the device block 50 is brought into surface contact with the mounting surface 26 a 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. By tightening the fastening bolts 45 into the screw holes 44a through the bolt insertion holes 62a, the device block 50 can be attached to and detached from the throttle body 2 in the direction of the rotation axis (9L (see FIG. 3)) of the throttle valve 14. It is attached (see FIGS. 1 to 3).

  FIG. 8 is a cross-sectional view showing the relationship between the throttle shaft of the throttle body and the throttle position sensor. As shown in FIG. 8, when the device block 50 is brought into surface contact with the unit mounting portion 26, the connecting tube portion 66 of the device block 50 is fitted into the opening recess 22 of the bearing boss portion 10 of the unit mounting portion 26. . At the same time, 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. As a result, the sensor rotor 143 is coupled to the throttle shaft 9 so as to be integrally rotatable. The leaf spring 144 elastically holds the sensor rotor 143 in the radial direction with respect 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.

  As shown in FIG. 6, when the device block 50 is brought into surface contact with the unit mounting portion 26, the bypass passage groove 68 of the device block 50 is aligned with the bypass passage groove 37 of the unit mounting portion 26. Thus, a bypass passage 70 that bypasses the throttle valve 14 is formed by forming a closed cross section and communicating the bypass inlet hole 28 and the bypass outlet hole 30. As a result, the intake air flowing through the bore 7 flows out from the bypass outlet hole 30 through the bypass inlet hole 28 to the bore 7. In addition, in the bypass outlet hole 30, the intake air (auxiliary intake air) flowing from the upstream side passes through the large-diameter side hole portion 32 a and the small-diameter side hole portion 32 b of the horizontal hole portion 32 and then from the vertical hole portion 31. It flows out toward the center of the downstream side of the bore 7 (see FIGS. 4 and 7).

  Further, the 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 (FIGS. 6 and 7). reference.). Accordingly, the valve body 110 of the ISC valve 51 is aligned on the same axis with respect to the valve seat portion 33 of the small diameter side hole portion 32b of the lateral hole portion 32, and the valve tip portion 133 of the valve body 110 is aligned with the valve seat. Opposite the part 33. Thereby, it arrange | positions so that advancing and retreating is possible in the 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 means 102 (see FIG. 1) when the engine is idle. 9 is a cross-sectional view showing the open state of the ISC valve with respect to the valve seat portion of the throttle body, and FIG. 10 is a cross-sectional view showing the closed state of the ISC valve.

  The operation of the ISC valve 51 will be described. Now, as shown in FIG. 10, it is assumed that the valve seat portion 33 is closed by the valve body 110 of the ISC valve 51, that is, the valve closed state. In this closed state, when a valve opening signal is output from the control means 102 (see FIG. 1) to the step motor 108, the motor rotor 114 (see FIG. 19) rotates in the valve opening direction (for example, forward rotation). Is done. For this reason, the rotation of the rotor shaft 127 of the motor rotor 114 causes the valve body 110 to retreat (upward movement in FIG. 10) through the threaded engagement between the screw shaft portion 129 of the rotor shaft 127 and the nut member 136. Then, the valve seat portion 33 is opened (see FIG. 9). When the valve closing signal is output from the control means 102 (see FIG. 1) to the stepping motor 108 in the opened state of the ISC valve 51 (see FIG. 9), the motor rotor 114 (see FIG. 19) is closed. Rotated (eg, reverse) in the valve direction. For this reason, when the rotor shaft 127 of the motor rotor 114 rotates, the valve body 110 is advanced (downwardly moved in FIG. 9) via screwing between the screw shaft portion 129 of the rotor shaft 127 and the nut member 136. Then, the valve seat portion 33 is closed (see FIG. 10). As described above, the amount of intake air flowing through the bypass passage 70 is adjusted, that is, controlled by the valve body 110 moving forward and backward based on the drive control of the step motor 108. The ISC valve 51 corresponds to an “idle control device” in this specification.

  Further, the detection cylinder portion 81 (see FIG. 23) of the device block 50 is inserted into the intake air temperature detection hole 42 of the unit mounting portion 26, and the tip end portion of the detection cylinder portion 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. Accordingly, 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 is detected, so that the temperature of the intake air flowing in the bore 7 so-called intake temperature is detected. Can do. Further, the thermistor 140 detects the temperature (intake air temperature) at the tip of the detection cylinder portion 81 of the device block 50, converts it into an electrical signal, and outputs the signal to the control means 102 (see FIG. 1). .

  31 is an explanatory view showing a pressure passage, FIG. 32 is a sectional view taken along the line XXXII-XXXII in FIG. 31, FIG. 33 is a sectional view taken along the line XXXIII-XXXIII in FIG. 31, and FIG. 34 is a line XXXIV-XXXIV in FIG. It is arrow sectional drawing. As shown in FIGS. 32 to 34, the mounting surface 50a of the device block 50 is joined to the mounting surface 26a of the unit mounting portion 26 of the body main body 5 in a surface contact manner, so that the sampling passage 39 (see FIG. 32) can be used. A pressure introduction passage 187 communicating with the pressure detection port 78 (see FIG. 34) is formed. FIG. 36 is a sectional view showing the pressure introduction passage in an expanded manner.

  That is, 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 communication groove portion 84 of the device block 50 is aligned with one end portion (rear end portion) of the communication 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). Further, the second communication groove 83 of the device block 50 is aligned with the other end (front end) of the communication groove 40 of the unit mounting portion 26 (see FIGS. 33 and 34). Further, the second throttle groove 85 of the unit mounting portion 26 and the open end surface of the pressure detection port 78 are closed by the mounting surface 50a of the device block 50 (see FIG. 34). As a result, a series of operations by the sampling passage 39, the relay groove portion 87, the first throttle groove portion 86, the first communication groove portion 84, the communication groove 40, the second communication groove portion 83, the second throttle groove portion 85, and the pressure detection port 78 are performed. A pressure introduction passage 187 having a closed cross section is formed (see FIG. 36).

  The intake pressure in the bore 7 is detected by the pressure sensor 54 by the intake pressure (negative pressure) in the bore 7 acting on the pressure detector 54 b of the pressure sensor 54 from the pressure intake 38 through the pressure introduction passage 187. Can do. The pressure sensor 54 detects the pressure acting on the pressure detection unit 54 b 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, and the detection signal is controlled by the control means 102. (See FIG. 1).

  As shown in FIG. 36, the pressure introduction passage 187 communicates from the sampling passage 39 on the body body 5 side to the relay groove portion 87, the first throttle groove portion 86, and the first communication groove portion 84 on the device block 50 side. Further, it communicates with the communication groove 40 on the body body 5 side, and further communicates with the second communication groove portion 83, the second throttle groove portion 85, and the pressure detection port 78 on the device block 50 side. As a result, the pressure introduction passage 187 is not formed on the same plane, but has a labyrinth structure that moves back and forth between the body body 5 side and the device block 50 side.

  The pressure introduction passage 187 is provided in the first passage portion 261 by the sampling passage 39 and the relay groove portion 87, the second passage portion 262 by the first throttle groove portion 86, the first communication groove portion 84 and the communication groove portion 84. The third passage portion 263 by the groove portion of the corresponding connecting groove 40, the fourth passage portion 264 by the groove portion of the corresponding connecting groove 40 between the both connecting groove portions 83, 84, the second connecting groove portion 83, and the connecting groove portion 83 thereof. The fifth passage portion 265 by the groove portion of the communication groove 40 corresponding to, the sixth passage portion 266 by the second throttle groove portion 85, and the seventh passage portion 267 by the pressure detection port 78, a total of seven passage portions 261- 267. These passage portions 261 to 267 are passage portions having mutually different passage cross-sectional areas and / or volumes. In FIG. 36, the passage ranges of the passage portions 261 to 267 are shown. In addition, the second passage portion 262 formed by the first restriction groove portion 86 and the sixth passage portion 266 formed by the second restriction groove portion 85 correspond to the “restriction passage portion that restricts the passage sectional area” in this specification.

  Thus, the seven-stage passage portions 261 to 267 are formed of passage portions having different natural frequencies. The second passage portion 262 is a throttle passage portion having a cross-sectional area ratio with respect to the first passage portion 261 of 1/10 or less. Further, the sixth passage portion 266 is a throttle passage portion whose cross-sectional area ratio with respect to the fifth passage portion 265 is 1/10 or less. Further, the 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 The volume change of the passage portion 263 and the fourth passage portion 264, the volume change of the fourth passage portion 264 and the fifth passage portion 265, and the volume change of the fifth passage portion 265 and the sixth passage portion 266 are 50 % Or more is set. Thereby, the pressure noise in the high frequency region in the detected pressure can be attenuated.

  Moreover, the volume of the 1st channel | path part 261 is set to 2 times or more of the total volume of the 2nd-7th channel | path parts 262-267. Thereby, even if the passage air contracts due to rapid cooling of the device block 50 or the like, 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, when rapidly cooling from the maximum temperature of 120 ° C. to 20 ° C. at the normal use temperature, the passage air contracts to about 2/3. In this case, even if passage air contracts by setting the volume of the first passage portion 261 to be twice or more the total volume of the second to seventh passage portions 262 to 267, the first passage portion 261 is set. Therefore, it is possible to prevent or reduce foreign matter suction, that is, intrusion 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.

  Further, when the device block 50 is brought into surface contact with the throttle body 2, the gasket 180 (see FIG. 29) mounted in the gasket fitting groove 90 of the device block 50 is attached to the mounting surface 50a of the device block 50 and the unit mounting portion. The mechanical connection portion and the communication portion between the mounting surface 26a and the mounting surface 26a are elastically sealed (see FIG. 3). Thus, as shown in FIG. 31, the shared seal portion (reference numeral 180 a) 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 portion (reference numeral 180b) attached to the seal portion 184 and the common seal portion (reference numeral 180c attached) for the second seal portion 182 and the fifth seal portion 185. It is continuous in a letter shape. For this reason, the installation of the gasket 180 with respect to the device block 50 can be improved compared with the case where the common seal part 180a is not continuous with the common seal part 180b and the common seal part 180c. As shown in FIG. 33, the common seal portion 180a crosses the open end surface of the connecting groove 40a of the mounting surface 26a of the unit mounting portion 26 of the body body 5 and the open end surface thereof, but bisects the connecting groove 40. Not. The common seal portion 180a corresponds to the “common seal portion facing the opening surface of the communication groove of the body body” in the present specification.

  Thus, the device cover 60 is joined to the device block 50 by laser welding over the entire circumference. The device block 50 is made of an absorptive resin material having a high absorption rate of laser light. As the resin material of the device block 50, for example, a polybutylene terephthalate resin (PBT) mixed with about 30% by weight of glass fiber and a predetermined colorant such as carbon black, dye or pigment is mixed. Can do. The device cover 60 is made of a transparent resin material having a high laser beam transmittance. As 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.

  Next, the detailed structure of the gasket 180 will be described. As shown in FIG. 30, the gasket 180 has contact portions 272 and retaining portions 273 on both side surfaces of the gasket main body portion 271 that forms the main body. 37 is a surface view showing the contact portion of the gasket, FIG. 38 is a sectional view taken along the line XXXVIII-XXXVIII in FIG. 37, FIG. 39 is a sectional view taken along the line XXXIX-XXXIX in FIG. 37, and FIG. FIG. 41 is a cross-sectional view taken along the line XXXXI-XXXXI in FIG. 40. FIG. 42 is a cross-sectional view showing the fitting state of the gasket main body portion of the gasket with respect to the gasket fitting groove of the device block, and FIG. 43 shows the fitting state of the gasket contact portion with the gasket fitting groove of the device block. 44 is a cross-sectional view showing a fitting state of the retaining portion of the gasket with respect to the gasket fitting groove of the device block, and FIG. 45 is a cross-sectional view showing a buckled state of the gasket main body portion of the gasket.

  As shown in FIG. 38, the gasket main body 271 is formed in a rectangular shape with a long cross section that lengthens the front and back direction (vertical direction in FIG. 38). As shown in FIG. 42, the gasket main body 271 is symmetrical 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. Is formed. The radial width 271W (see FIG. 38) of the gasket main 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. . Thereby, the gasket main-body part 271 is formed in the gasket fitting groove 90 so that loose fitting is possible (refer FIG. 42). Further, the thickness 271t (see FIG. 38) in the front and back direction of the gasket main body portion 271 is set to about 1.1 to 1.3 times the depth 90d (see FIG. 42) of the gasket fitting groove 90. Has been. Thus, when the gasket main body 271 is fitted into the gasket fitting groove 90 and brought into contact with the groove bottom surface 90a of the fitting groove 90, the front end (the upper end in FIG. ) Protrudes from the mounting surface 50a of the device block 50 (see FIG. 42).

  As shown in FIGS. 37 and 38, the abutting portion 272 is from the front side (upper side in FIG. 39) or the rear side (lower side in FIG. 39) with respect to the central part of both side surfaces of the gasket main body 271. It is formed in an arc shape as seen. The contact portion 272 extends in the front and back direction of the gasket main 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. In addition, as shown in FIG. 30, the contact 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 the contact portions 272 are formed so as to be close to the groove wall surface 90b of the fitting groove 90 when the gasket main body portion 271 is fitted into the gasket fitting groove 90 ( (See FIG. 43).

  As shown in FIGS. 41 and 42, the retaining portion 273 is viewed from the front surface side (upper side in FIG. 41) or the rear surface side (lower side in FIG. 41) with respect to the outer end portion of the contact portion 272. It is formed in a semicircular shape. The retaining portion 273 extends along the outer end portion of the contact portion 272 in the front and back direction of the gasket 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. Further, as shown in FIG. 30, 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 the 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 retaining portions 273 are formed so as to be able to elastically contact the groove wall surface 90b of the fitting groove 90 when the gasket main body portion 271 is fitted into the gasket fitting groove 90 (FIG. 44.).

  When the gasket 180 is fitted into the gasket fitting groove 90 of the device block 50, the gasket main body portion 271 is loosely fitted into the gasket fitting groove 90, and the contact portion 272 is the fitting groove. 90 is adjacent to the groove wall surface 90b (see FIG. 29). Further, the retaining member 273 is elastically brought into contact with the groove wall surface 90b of the gasket fitting groove 90, so that the sealing member can be prevented from being removed in the fitting groove 90 (see FIG. 44). In this state, when 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 body 5, the end of the gasket main body portion 271 protruding from the mounting surface 50a of the device block 50 is obtained. The portion is pushed into the gasket fitting groove 90 using its elasticity. Thereby, a seal is made between the mounting surface 50a of the device block 50 and the mounting surface 26a of the unit mounting portion 26 of the body body 5. At this time, the gasket main body 271 loosely fitted in the gasket fitting groove 90 may buckle in the gasket fitting groove 90 (see FIG. 45). However, buckling of the gasket main body portion 271 can be prevented or reduced by the contact portion 272 contacting the groove wall surface 90b of the gasket fitting groove 90 (see FIG. 43).

Next, a positioning structure for positioning the terminal support portions 120 and 121 of the step motor 108 of the ISC valve 51 in the device block 50 will be described. 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 the motor fitting portion of the device block, and FIG. 48 is a motor fitting portion of the device block. It is a rear view which shows the state which has arrange | positioned the step motor.
As shown in FIGS. 46 and 47, a pair of support wall portions 274 located between the motor fitting portion 72 and the two terminal plates 99a and 99b are provided on the bottom surface in the housing recess 58 of the device block 50. Is formed. A concave groove portion 275 is formed between the both support wall portions 274. The concave groove portion 275 is formed so that the terminal support portion 121 on the insertion side (lower side in FIG. 46) of the step motor 108 can be closely fitted. Further, the recessed groove portion 278 (specifically, both support wall portions 274 forming the recessed groove portion 278) is formed simultaneously with the resin molding of the device block 50.

  When the step motor 108 is fitted into the motor fitting portion 72 of the device block 50, the terminal support portion 121 of the step motor 108 is fitted into the groove 275 of the motor fitting portion 72 (see FIG. 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. Further, the terminal plates 99a and 99b correspond to “terminal portions” in the present specification.

Next, a positioning structure for positioning the terminal portion 141a of the terminal 141 of the thermistor 140 of the temperature sensor 53 in the device block 50 will be described. 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, and FIG. 51 is the device block temperature sensor. It is a rear view which shows the state which has arrange | positioned the thermistor in the insertion hole part.
As shown in FIGS. 49 and 50, a support wall portion 277 surrounding the opening end portion 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 to communicate between the temperature sensor insertion hole 80 and each terminal plate 1000a, 110b. Each concave groove 278 is formed so that the terminal 141a of the terminal 141 of the thermistor 140 can be closely fitted. Further, each concave groove portion 278 (specifically, the support wall portion 278 forming the concave groove portion 278) is formed simultaneously with the resin molding of the device block 50. In addition, a tapered guide groove 279 that gradually widens 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.

  When the thermistor 140 is fitted into the temperature sensor insertion hole 80 of the device block 50, the terminal portions 141 a of both terminals 141 of the thermistor 140 are inserted into the recessed groove portion 278 through the guide grooves 279 of the support wall portion 277. (See FIG. 51). Thereby, the terminal part 141a of both the terminals 141 is 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.

  According to the engine intake device 1 described above, the pressure introduction passage 187 communicating from the sampling passage 39 to the pressure detection port 78 is formed by joining the mounting surface 26a of the body 5 and the mounting surface 50a of the device block 50 ( (See FIG. 36). Therefore, the pressure introduction passage 187 can be easily formed by the cooperation between the mounting surface 26a of the body 5 and the mounting surface 50a of the device block 50. As a result, mass productivity can be improved and cost reduction can be realized.

  Further, the communication groove 40 provided on the mounting surface 26a of the body 5 has a closed cross section by joining the mounting surface 50a of the device block 50, so that at least a part of the pressure introduction passage 187 can be easily formed. Yes (see FIG. 36).

In addition, the first connecting groove 84, the first throttle groove 86, and the relay groove 87 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 the pressure is reduced. At least a part of the introduction passage 187 can be easily formed (see FIG. 32).
In addition, the second communication groove 83 and the second throttle groove 85 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, so that the pressure introduction passage 187 At least a portion can be easily formed (see FIG. 34).

  Further, a sampling passage groove (first communication groove portion 84, first throttle groove portion 86 and relay groove portion 87) and pressure detection passage groove (second connection groove portion) provided on the mounting surface 50a of the device block 50 are provided. 83 and the second throttle groove portion 85), and the connecting groove 40 formed on the mounting surface 26a of the body body 5 are closed by a joint between the mounting surface 26a of the body body 5 and the mounting surface 50a of the device block 50. (See FIG. 36). Thereby, a series of pressure introduction passages 187 from the sampling passage 39 to the pressure detection port 78 can be easily formed.

  Further, the pressure introduction passage 187 is constituted by a total of seven passage portions 261 to 167 having different passage cross-sectional areas and / or volumes (see FIG. 36). Thereby, 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 can be said to be effective for making the intake device 1 compact by allowing the pressure inlet 38 to be arranged close to the throttle valve 14 (see FIG. 4).

  Further, 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). Thereby, 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.

  Further, since the pressure introduction passage 187 has a labyrinth structure, 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 (see FIG. 36). .)

  Further, the pressure introduction passage 187 can be sealed by the gasket 180 interposed between the mounting surface 26a of the body 5 and the mounting surface 50a of the device block 50 (see FIG. 36). Thereby, the pressure leakage of the pressure introduction passage 187 can be prevented or reduced, and the detection accuracy of the intake pressure by the pressure sensor 54 can be improved.

  Further, the gasket 180 can be mounted in the gasket fitting groove 90 formed on the mounting surface 50a of the device block 50 (see FIG. 29).

  Further, by fitting the first seal portion 181 of the gasket 180 with respect to the first groove portion 91 of the gasket fitting groove 90 as a reference for fitting the gasket 180 with respect to the gasket fitting groove 90, the gasket fitting is performed. The gasket 180 can be easily attached to the groove 90 (see FIG. 29).

  Further, an annular fifth seal portion 185 surrounding the sampling passage groove (first communication groove portion 84, first throttle groove portion 86 and relay groove portion 87), and pressure detection passage groove (second communication groove portion). 83 and the annular fourth seal portion 184 surrounding the second throttle groove portion 85) are continuous with the common seal portion 180a facing the opening surface of the communication groove 40 of the body body 5 (see FIG. 31). Accordingly, it is possible to improve the installation of the seal portions 185 and 184 that are continuous with each other in the gasket 180.

  Further, the gasket main body 271 of the gasket 180 is loosely fitted into the gasket fitting groove 90, so that the gasket 180 can be easily mounted in the gasket fitting groove 90 (see FIG. 42). .)

  Further, the retaining portion 273 provided in the gasket 180 elastically contacts the groove wall surface 90b in the gasket fitting groove 90, so that the gasket 180 can be prevented from being removed in the gasket fitting groove 90 (FIG. 44.).

  Further, the abutting portion 272 provided on the gasket 180 abuts against the groove wall surface 90b of the gasket fitting groove 90, whereby the gasket 180 (by joining the mounting surface 26a of the body body 5 and the mounting surface 50a of the device block 50). Specifically, the buckling of the gasket main body portion 271) can be prevented or reduced (see FIG. 43). Thereby, the sealing performance of the gasket 180 can be improved.

  Moreover, since the cross section of the gasket 180 is formed in line symmetry with respect to the center line 271C, the sealing performance of the gasket 180 can be improved (see FIGS. 37 to 41).

  Further, the terminal 117 of the step motor 108 of the ISC valve 51 is electrically connected to the terminal plates 99a and 99b of the device block 50. And the terminal support part 121 (120) of the step motor 108 is positioned by the ditch | groove part 275 provided in the device block 50 (refer FIG. 48). For this reason, it is possible to prevent or reduce the occurrence of the vibration of the terminal 117 of the step motor 108 of the ISC valve 51 and the disconnection due to the vibration due to vehicle vibration or the like. The disconnection here corresponds to disconnection of the terminal 117 itself and disconnection due to breakage of the welded portion between the terminal 117 and the terminal plates 99a and 99b.

  Moreover, it can position easily by fitting the terminal support part 121 (120) of the step motor 108 with respect to the ditch | groove part 275 formed in the device block 50 (refer FIG. 48).

  Further, the terminal portion 141 a of the terminal 141 of the thermistor 140 of the temperature sensor 53 is electrically connected to the terminal plates 100 a and 110 b of the device block 50. And the terminal part 141a of the terminal 141 of the thermistor 140 is positioned by the recessed groove part 278 provided in the device block 50 (refer FIG. 51). For this reason, it is possible to prevent or reduce the vibration of the terminal 141 of the thermistor 140 of the temperature sensor 53 due to vehicle vibration or the like and the occurrence of disconnection due to the vibration. 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.

  Moreover, it can position easily by fitting the terminal part 141a of the terminal 141 of the thermistor 140 with respect to the ditch | groove part 278 formed in the device block 50 (refer FIG. 51).

  Further, by forming the concave groove portions 275 and 278 simultaneously with the resin molding of the device block 50, the cost can be reduced.

  Further, as a device component other than the pressure sensor 54, an ISC valve 51 that controls the amount of auxiliary air flowing through the bypass passage 70 that bypasses the throttle valve 14 can be provided (see FIGS. 6 and 7).

  Further, as a device component other than the pressure sensor 54, a throttle position sensor 52 for detecting the opening degree of the throttle valve 14 can be provided (see FIG. 3).

  Further, as a device component other than the pressure sensor 54, a temperature sensor 53 for detecting the intake air temperature can be provided (see FIG. 23).

  Further, since the device block 50 is detachably fastened to the throttle body 2 by fastening bolts 45 (see FIGS. 1 and 2), the throttle body 45 can be removed by removing the fastening bolts 45 as necessary. The device block 50 can be separated from the two. For this reason, the maintenance of the throttle body 2 and the device block 50 can be easily performed.

  Further, according to the device unit 3 described above, it is possible to provide the device unit 3 used for the engine intake device 1 in which the pressure introduction passage 187 (see FIG. 36) can be easily formed (FIGS. 1 to FIG. 1). 3).

  The present invention is not limited to the above-described embodiments, and modifications can be made without departing from the gist of the present invention. For example, 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. Further, although the device block 50 is detachably provided on the throttle body 2, the device block 50 may be detachably provided on the throttle body 2. The device unit 3 may be any device in which the pressure sensor 54 is modularized in the device block 50 as at least one device component. Further, the resin welding of the device cover 60 to the device block 50 is not limited to laser welding, but is replaced by welding using a hot plate, so-called hot plate welding, vibration welding, so-called vibration welding, or resistance wire welding, so-called resistance wire welding. be able to. Moreover, it can replace with resin adhesion of the device cover 60 with respect to the device block 50, and can replace with adhesion | attachment by an adhesive agent, screwing, a clip stop, a snap fit coupling | bonding, etc. Further, instead of the contact type throttle position sensor 52, a non-contact type throttle position sensor may be employed. Further, as the actuator of the ISC valve 51, a DC motor, a brushless motor, an electromagnetic solenoid, a temperature sensitive device with a built-in thermo wax, 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. Further, the number of pressure inlets 38 is not limited to two, but may be one or three or more.

  In the above embodiment, the pressure introduction passage 187 is constituted by a total of seven passage portions 261 to 267, but in order to reduce the pulsation of the detected pressure, it may be constituted by at least three passage portions, preferably 4 It is good to comprise in the channel | path part more than a stage, and also it is desirable to comprise with 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. Moreover, in the said Example, although the cross-sectional area ratio of the 2nd channel | path part 262 with respect to the 1st channel | path part 261 was 1/10 or less, the cross-sectional area ratio can be set suitably, Preferably it is 1/5. The following is desirable. Moreover, in the said Example, although the cross-sectional area ratio of the 6th channel | path part 266 with respect to the 5th channel | path part 265 was 1/10 or less, the cross-sectional area ratio can be set suitably, Preferably it is 1/5. The following is desirable. Further, 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, and may be formed on the same plane.

  In the above embodiment, the gasket 180 is mounted on the gasket fitting groove 90 of the mounting surface 50a of the device block 50. However, the gasket fitting groove 90 is formed on the mounting surface 26a of the body 5 and the fitting is performed. A gasket 180 can also be mounted in the groove. Further, when a sheet-like gasket 180 is used, the gasket fitting groove 90 can be omitted. In the embodiment, the retaining portion 273 is provided on the outer surface of the abutting portion 272 of the gasket 180, but a dedicated retaining portion 273 can be provided separately from the abutting portion 272. Further, the contact portion 272 and / or the retaining portion 273 of the gasket 180 can be omitted. Moreover, in the said Example, although the cross section of the gasket 180 was formed in the line symmetrical shape on the basis of the centerline 271C, it can also be formed in an asymmetrical shape. Moreover, in the said Example, although the recessed groove part 275 of the device block 50 shall engage only the terminal support part 121 of the step motor 108 of the ISC valve 51, what fits both the terminal support parts 121 and 120 is used. It is good. Moreover, in the said Example, although the groove part 275,278 as a positioning part was shape | molded simultaneously with the resin molding of the device block 50, a device block 50 can also be attached by attaching the positioning member formed separately. 50 may be provided with a groove 275 and / or a groove 278.

It is a side view which shows the air intake device of the engine concerning one Example. It is a rear view which shows the intake device of an engine. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2. It is a side view which shows the device unit attachment side of a throttle body. It is a plane sectional view showing a bypass passage. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6. It is sectional drawing which shows the relationship between the throttle shaft of a throttle body, and a throttle position sensor. It is sectional drawing which shows the valve opening state of the ISC valve with respect to the valve seat part of a throttle body. It is sectional drawing which shows the valve closing state of the ISC valve with respect to the valve seat part of a throttle body. It is a disassembled perspective view which shows the component of a device unit. It is sectional drawing which shows the peripheral part of the throttle position sensor of a device unit. It is sectional drawing which shows the peripheral part of the connector part of a device unit. It is a front view which shows a device block. It is a rear view which shows a device block. It is a disassembled sectional view which shows the peripheral part of a throttle position sensor. It is an exploded sectional view showing the peripheral part of an ISC valve and a pressure sensor. It is an exploded sectional view showing the peripheral part of a temperature sensor. It is sectional drawing which shows an ISC valve | bulb. It is the front view which looked at the ISC valve from the tip side of a valve element. It is a side view which shows the device cover attachment side of the device block carrying an ISC valve and a temperature sensor. It is sectional drawing which shows the mounting state of the ISC valve | bulb with respect to a device block. It is sectional drawing which shows the mounting state of the temperature sensor with respect to a device block. It is a side view which shows the device cover attachment side of the device block which mounts a wiring board. It is a surface view which shows a wiring board. It is a back view which shows a wiring board. It is sectional drawing which shows the mounting state of the pressure sensor with respect to a device block. It is a reverse view which shows a device cover. It is a side view which shows the throttle body attachment side of the device block which mounted | wore the gasket. It is a surface view which shows a gasket. It is explanatory drawing which shows a pressure channel. FIG. 32 is a sectional view taken along line XXXII-XXXII in FIG. 31. FIG. 32 is a sectional view taken along line XXXIII-XXXIII in FIG. 31. FIG. 32 is a cross-sectional view taken along line XXXIV-XXXIV in FIG. 31. It is a perspective view which shows the attachment surface of the unit attachment part of a body main body, and the attachment surface of a device block in a spread state. It is sectional drawing which expand | deploys and shows a pressure introduction channel | path. It is a surface view which shows the contact part of a gasket. It is XXXVIII-XXXVIII sectional view taken on the line of FIG. It is XXXIX-XXXIX sectional view taken on the line in FIG. It is a surface view which shows the retaining part of a gasket. It is XXXXI-XXXXI sectional view taken on the line of FIG. It is sectional drawing which shows the fitting state of the gasket main-body part of the gasket with respect to the fitting groove for gaskets of a device block. It is sectional drawing which shows the fitting state of the contact part of the gasket with respect to the fitting groove for gaskets of a device block. It is sectional drawing which shows the fitting state of the retaining part of the gasket with respect to the fitting groove for gaskets of a device block. It is sectional drawing which shows the buckling state of the gasket main-body part of a gasket. It is a disassembled perspective view which shows the relationship between the motor fitting part of a device block, and a step motor. It is a rear view which shows the motor fitting part of a device block. It is a rear view which shows the state which has arrange | positioned the step motor in the motor fitting part of a device block. It is a disassembled perspective view which shows the relationship between the insertion hole part for temperature sensors of a device block, and a thermistor. It is a rear view which shows the insertion hole part for temperature sensors of a device block. It is a rear view which shows the state which has arrange | positioned the thermistor in the insertion hole part for temperature sensors of a device block. It is sectional drawing which shows the intake device which concerns on patent document 1.

Explanation of symbols

1 Intake device 2 Throttle body 3 Device unit 5 Body body 7 Bore (intake passage)
14 Throttle valve 26 Unit mounting part 26a Mounting surface (mating surface facing device block, mating surface of body body)
38 Pressure inlet 39 Sampling passage 40 Communication groove (passage groove for communication)
50 Device block 50a Mounting surface (Mating surface facing the body body, Device block mating surface)
51 ISC valve (idle control device, device parts)
52 Throttle position sensor (device parts)
53 Temperature sensor (device parts)
54 Pressure sensor (device parts)
70 Bypass passage (auxiliary air passage)
78 Pressure detection port 83 Second communication groove (passage groove for pressure detection)
84 First communication groove (sampling passage groove)
85 Second throttle groove (passage groove for pressure detection)
86 First throttle groove (sampling passage groove)
87 Relay groove (channel for sampling)
90 Gasket fitting groove (seal member mounting groove)
91 First groove (annular groove)
99a, 99b Terminal board (terminal part)
100a, 100b Terminal board (terminal part)
108 Step motor (actuator)
117 terminal 120, 121 terminal support part 140 thermistor 141 terminal 180 gasket (seal member)
187 Pressure introducing passage 271 Gasket body 272 Abutting portion 273 Stopping portion 275 Concave groove portion (positioning portion)
278 Concave groove (positioning part)

Claims (22)

A throttle body provided with a throttle valve for opening and closing the intake passage relative to the body body forming the intake passage of the engine;
An engine intake device comprising: a device unit formed by modularizing at least one device component with respect to a device block that is detachably or non-detachably provided on the body body;
As the device part, comprising a pressure sensor for detecting the intake pressure in the intake passage,
The body body is provided with a pressure intake opening that opens to the intake passage, and a sampling passage that opens to a mating surface that communicates with the pressure intake and faces the device block,
The device block is provided with a pressure detection port in which a pressure detection unit of the pressure sensor is arranged and opened in a mating surface facing the body body,
An engine air intake apparatus characterized in that a pressure introduction passage communicating from the sampling passage to the pressure detection port is formed by joining the mating surface of the body body and the mating surface of the device block. The engine intake device according to claim 1,
An intake air for an engine, characterized in that a passage groove that forms at least a part of the pressure introduction passage is formed in the mating surface of the body main body so as to have a closed cross section by joining the mating surfaces of the device block apparatus. The engine intake device according to claim 1 or 2,
An intake air for an engine, characterized in that a passage groove that forms at least a part of the pressure introduction passage is formed in the mating surface of the device block by forming a closed cross-section by joining the mating surfaces of the body body. apparatus. The engine intake device according to claim 1,
A sampling passage groove communicating with the sampling passage and a pressure detection passage groove communicating with the pressure detection port are provided on the mating surfaces of the device blocks.
On the mating surface of the body body, there is provided a passage groove for communication capable of communicating the passage groove for sampling of the device block and the passage groove for pressure detection,
The sampling passage groove, the pressure detection passage groove, and the communication passage groove are closed by joining the mating surface of the body body and the mating surface of the device block, whereby the sampling is performed. An intake device for an engine, characterized in that a series of pressure introduction passages extending from the passage to the pressure detection port are formed. An engine intake device according to any one of claims 1 to 4,
An intake device for an engine, wherein the pressure introduction passage is constituted by three or more passage portions having different passage cross-sectional areas and / or volumes. An engine intake device according to any one of claims 1 to 5,
An intake device for an engine, wherein a throttle passage portion for reducing a passage cross-sectional area is formed in the pressure introduction passage. An intake device for an engine according to any one of claims 1 to 6,
An intake system for an engine, wherein the pressure introduction passage has a labyrinth structure. An intake device for an engine according to any one of claims 1 to 7,
An engine intake system, wherein a sealing member for sealing the pressure introducing passage is interposed between a mating surface of the body body and a mating surface of the device block. The engine intake device according to claim 8,
An intake device for an engine, wherein a sealing groove for mounting the seal member is formed on a mating surface of the device block or a mating surface of the body body. An engine intake device according to claim 9,
The seal member is provided with an annular seal portion surrounding a predetermined portion,
An annular groove portion for attaching the annular seal portion is provided in the seal member mounting groove,
The engine intake device according to claim 1, wherein the mounting of the annular seal portion to the annular groove portion serves as a reference for mounting the seal member to the mounting groove for the seal member. The engine intake device according to any one of claims 8 to 10,
The seal member mounted in the seal member mounting groove on the mating surface of the device block includes an annular seal portion surrounding the sampling passage groove, and an annular seal portion surrounding the pressure detection passage groove; An engine intake device comprising: a common seal portion that shares a part of both the seal portions and faces an opening surface of a passage groove for communication of the body body. The engine intake device according to any one of claims 8 to 11,
An intake system for an engine, wherein the seal member can be loosely fitted into the seal member mounting groove. The engine intake device according to claim 12,
An intake device for an engine, wherein the seal member is provided with a retaining portion that elastically contacts a groove wall surface in the seal member mounting groove. An engine intake device according to claim 12 or 13,
The engine intake device according to claim 1, wherein the seal member is provided with an abutting portion that abuts against a groove wall surface of the seal member mounting groove. The engine intake device according to claim 13 or 14,
An intake system for an engine, wherein a cross section of the seal member is formed symmetrically with respect to a center line. An intake device for an engine according to any one of claims 1 to 15,
The device component modularized in the device block includes a terminal that is electrically connected to a terminal portion provided in the device block and / or a terminal support portion that supports a base portion of the terminal,
An intake device for an engine, wherein a positioning portion for positioning a terminal or a terminal support portion of the device component is provided in the device block. The engine intake device according to claim 16,
The engine intake device according to claim 1, wherein the positioning portion is a concave groove portion formed in the device block and fitted with a terminal or a terminal support portion of the device component. The engine intake device according to claim 17,
The air intake apparatus for an engine, wherein the concave groove portion is formed simultaneously with resin molding of the device block. The engine intake device according to any one of claims 16 to 18, comprising:
An engine intake system comprising an idle control device that controls an amount of auxiliary air flowing through an auxiliary air passage that bypasses the throttle valve as a device component other than the pressure sensor. An intake device for an engine according to any one of claims 16 to 19,
An engine intake device comprising a throttle position sensor for detecting an opening of the throttle valve as a device component other than the pressure sensor. The engine intake device according to any one of claims 16 to 20, comprising:
An engine intake system comprising a temperature sensor for detecting intake air temperature as a device component other than the pressure sensor. A device unit used in the engine intake system according to any one of claims 1 to 21.

Images