TW200537017A - Idle air control device of fuel injection device - Google Patents

Abstract

An idle air control device of a fuel injection device is provided, wherein an air valve is driven by a motor. The air valve is accurately disposed concentrically with an air valve guide hole bored in a throttle body to improve the dynamic characteristics of the air valve. The motor (M) is disposed in a motor case (1a), a cylindrical collar (2) is fixedly disposed in an insert tube part (1b) formed integrally with the motor case (1a), and a motor output shaft (Ma) is projectedly disposed in the collar (2). A slider (3) is threaded to the outer periphery of the motor output shaft (Ma), and the air valve (4) is disposed between the outer peripheral part (3f) of the slider (3) and the inner peripheral part (2b) of the collar (2). The slider is formed such that its rotation is suppressed by the collar (2) and its axial movement only is allowed. The air valve (4) is disposed so as to be elastically pressed toward the locking stage part (3g) of the slider (3) by an air valve spring (5). The slider (3) is axially moved according to the rotation of the motor (M), and the air valve (4) is also axially moved in synchronism with the movement of the slider (3) to control the opening of a bypass air passage (54) opening in the air valve guide hole (55).

Description

200537017 IX. Description of the invention: [Technical field to which the invention belongs] This invention relates to a fuel injection device for boosting fuel in a fuel tank by a fuel pump and injecting the boosted fuel to an engine through a fuel injection valve. In particular, it relates to an idle air control device that can control the amount of idle air supplied to the engine when the engine is idling (id 1 ing) or when the engine is idling (offid 1 ing). [Prior art]

Fig. 4 shows an idle air control device of a conventional fuel injection device. In the description with reference to FIG. 4, 50 is a throttling fluid provided with an intake passage 51 inside, and the intake passage 5 1 is turned on and off by the rotation of a butterfly throttle valve 5 3 installed on a throttle broad shaft 5 2. control. In addition, the intake passage 51 is divided by the throttle valve 5 3 into the intake passage 5 1 a from the upstream side of the throttle valve 5 3; and the intake passage 51 from the downstream side of the throttle valve 5 3. 5 1 b; while the upstream air intake path 5 1 a is connected to an air cleaner (not shown), the downstream air intake path 5 1 b is connected through an intake pipe.

5 4 is a bypass air passage, one end of which is open to the intake air passage 5 1 a on the upstream side, and the other end is open to the intake passage 5 1 b on the downstream side. The bypass air passage 54 is bypassed to the throttle valve 5 3 and The intake passage 51 is connected to the upstream side and the downstream side. 55 is a valve guide hole connected to the bypass air path 54, and one end thereof is opened at one end 50a of the throttle body 50 through the insertion hole 56. The idling air control device 60 is configured as follows. Wax case 61 has PTC heaters 62 and 5 inside it 312XP / Invention Specification (Supplement) / 94-07 / 94109739 200537017 Wax element enclosed in heat-shrinkable material 6 3, PTC heater The electrode of 6 2 is connected to the connectors 64a and 64b in the direct connection part 61a formed with the fiber box 6 1 -body. Further, the connectors 6 4 a and 6 4 b is followed by wires L1, L2. An external thread formed on the outer periphery of the cylindrical portion 6 1 b extending below the wax box 61 is screwed to an internal thread formed on the inner periphery of the cylindrical portion 6 5 a formed above the cylindrical insertion cylindrical portion 65. Thereby, the insertion tube portion 65 is integrally installed below the wax box 61, and 66 is a cup-shaped moving body movably arranged inside the φ of the soil box 61 and the insertion tube gp 6 5. This action The inner bottom of the body 66 abuts against the tip of the output shaft 6 3 a of the cymbal element 63 by the elastic force of the spring 67, and is energized. That is, one end of the spring 67 is fastened to a stop section 6 5 b formed in the inner side of the insertion tube 65, and the other end is fastened to the action body 6 6. The upper end is fastened by the spring 69 to the front end of the shaft portion 66b whose bottom portion extends downward within the automatic working body 66.

As above, the wax box 61 and the insertion tube portion 65 are integrally installed, and are arranged inwardly from above in FIG. 4 toward the bottom: PTC heater 6 2, wax element 6 3, action body 66, and air valve 68; The action body 66 secured to the air valve 68 is elastically abutted against the output rod 6 3 a of the wax element 63 by the elastic force of the spring 67 to form the idle air control device 60. In addition, the lower cylinder portion 6 5 c of the insertion cylinder portion 65 of the idle air control device is inserted into an insertion hole 5 6 which is opened at one end 50 0 a of the throttle body 50, and at the same time, the air valve 68 is inserted and arranged. Inside the valve guide hole 55. Also, in this state, the insertion tube portion 65 is screwed to the section 6 by a fixing member (not shown). 312XP / Invention Manual (Supplement) / 94-07 / 94109739 200537017 Fluid 50 0 and then the idle air control device 60 is fixedly arranged on the throttle body 50. According to the conventional idle air control device, when the engine is started, the thermal expansion and contraction material in the wax element 63 is contracted. Since the protruding amount of the output shaft 63a is small and the air valve 68 is in the upper position, the The air passage 54 is largely opened, and the engine is started by supplying air to the engine through the opening of the bypass air passage 54. On the one hand, the PTC heater 62 is supplied with electricity through a φ ECU or a battery (not shown) in synchronization with the start of the engine, so the PTC heater 62 generates heat and heats the wax element 63. When the wax element 63 is heated, the internal thermal expansion and contraction material will expand and gradually increase the protruding amount of the output shaft 6 3 a. The gas valve 6 8 and the protruding amount of the output shaft 6 3 a increase synchronously to bypass the air passage. The opening of 5 4 is gradually reduced. It can reduce the amount of air supplied from the bypass air passage 54 to the downstream air intake path 5 1 b in response to the increase in the temperature of the engine. As a result, the engine warm-up operation can be changed to normal Idle operation.

[Summary of the Invention] (Problems to be Solved by the Invention) According to the conventional idle air control device, the wax element 63 is affected not only by the heat of the PTC heater 62 but also by the temperature of the environment. Here, the protruding characteristic of the output shaft 6 3 a of the wax element 6 3 is suitable for the temperature state of the engine, but there is a difference between the protruding characteristic of the output shaft 6 3 a and the ambient temperature. For example, when the ambient temperature is at a high temperature, the protruding amount of the output shaft 6 3 a will increase, and the air valve 6 8 will tend to close the opening of the bypass air passage 5 4 'at 7 312XP / Invention Specification (Supplement) / 94-07 / 94] 09739 200537017 When the engine starts, it cannot supply sufficient air. In addition, the amount of protrusion of the output shaft 63a will be displaced due to the heat generated by the PTC heater 62, the heating of the PTC heater 62 of the wax element 63, and the volume of the thermal expansion and contraction material in the wax element 63, which will cause the output The response speed of the shaft 6 3 a becomes slow, and it makes it difficult to control a minute amount of air. The idle air control device of the present invention has been completed in view of the above-mentioned problems, and an object thereof is to provide a driving body for driving an air valve that can reliably absorb the eccentricity of the output shaft of the motor and the air valve when changing from a wax element to a motor. The air φ valve guide hole allows the air valve to be positioned correctly concentrically. In addition, it can use a cylindrical air valve arranged in a conventional valve guide hole with a circular cross section, and has interchangeability with a conventional idle air control device. The idling air control device of the fuel injection device thus completed. (Means for Solving the Problems) In order to achieve the above-mentioned object, the idle air control device of the fuel injection device of the present invention is configured by placing a throttle valve in an intake passage passing through the throttle body.

By bypassing the bypass circuit of the throttle valve, the intake passage on the upstream side of the throttle valve and the intake passage on the downstream side of the throttle valve are connected, and the valve guide connected to the bypass air passage is movably arranged. The first feature of the idle air control device for a fuel injection device that controls the amount of bypass air flowing in the bypass air path by using an air valve in the pilot hole is that the idle air control device includes a motor box that surrounds a motor, And, the insertion tube formed from the motor box opening downward, the box body formed by external molding; 8 312XP / Invention Specification (Supplement) / 94-07 / 94109739

200537017 a cylindrical collar fixedly arranged inside the insertion tube of the box body; a sliding piece screwed on a motor output shaft protruding from the motor to the inside of the collar; and Between the inner periphery of the ring and the outer periphery of the slider, it is restrained and arranged in the axial direction, and at the same time, the valve is slidably guided to the valve guide hole; the slider screwed to the motor output shaft is borrowed. The ring is restrained from rotating, and at the same time, it is configured to allow movement in the axial direction. Further, the aforementioned air width and slide are synchronized to the axial direction, and the bypass air path is controlled by the valve in the opening of the valve guide hole. Opening. In addition to the first feature of the present invention, a second feature of the present invention is that the front air valve is a stopper portion provided on the outer periphery of the lower end of the slider, and a stopper portion provided on the upper end of the slider. At the same time, the valve spring arranged on the outer periphery of the slide is pressed down and arranged toward the stopper section. Further, between the inner periphery of the valve and the outer periphery of the slider, and the outer periphery of the valve A clearance larger than the eccentricity of the longitudinal axis center of the longitudinal axis valve guide hole of the motor output shaft is formed between the inner peripheral parts of the ring. Furthermore, in addition to the first feature described above, the third feature of the present invention is that a bottom side of an internally threaded hole of a slider of the motor output shaft is provided with a lead-in stop portion that stops the lower end of the output shaft, and An inner side portion of the ring is provided with an extension-side stop portion of the stopper section above the stopper. In addition to the first feature described above, a fourth feature of the present invention is that a gasket is arranged between the inner bottom of the insertion tube portion of the box body and the upper end of the ring, so that the gasket is formed inside the gasket. The lip is slidingly connected to the motor. 312XP / Invention Manual (Supplement) / 94-07 / 94109739 Back to the air— / L δ Another piece is shown in front of the He and the spiral horse bottom 9

200537017 The periphery of the shaft. (Effects of the Invention) According to the first feature of the present invention, when the motor is driven and the output shaft of the motor rotates in the direction, the slider is restrained from rotating due to the ring by the ring, so the valve is also synchronized with the slider Move down. The air valve is guided to move downward in the air valve guide hole, and the air passage is opened in the guide hole to bypass the air path. The air valve is blocked by the one-way rotation of the motor. In addition, when the motor output shaft performs maximum rotation in one direction, the slider moves in the lowermost direction, and the air valve can be kept fully closed in the air path opened in the valve guide hole. On the other hand, when the output shaft of the motor rotates in the other direction, it is prevented from rotating due to the slip ring and moves upward. Therefore, the air and the slider move upward synchronously. This valve moves in the upward direction to bypass the air path in the opening of the valve guide hole. The valve can be opened according to the amount of rotation in the direction of the motor. Moving to the uppermost direction, the air valve can keep the bypass air passage in the opening in the guide hole of the air valve fully open. According to this first feature, the slide member screwed on the motor output shaft is prevented from rotating for the ring, and at the same time, the movement in the axial direction is allowed, and the other air valve and the slide member are locked in the shaft direction. Therefore, the air valve and the slider can be simultaneously moved within the air valve guide hole to control the opening of the bypass air passage opened in the air valve guide hole. By suppressing the rotation of the slider between the ring and the ring, it is not necessary to hold the valve 312XP / Invention Manual (Supplement) / 94-07 / 94109739 when the pair is down, and the valve will be protected by the bypass. Sometimes, another game can be set up with 10

200537017 Rotational restraint means, the cross section of the valve can be rounded. In this way, a circular valve guide hole with a cross section made by a conventional idling control device of a wax element can be used, so that the idling control device of the present invention can be easily installed and interchangeable with the previous throttle body. In addition, when a single box body forms a motor box that surrounds the outer periphery of the motor and an insertion tube portion extending downward, when the box body is molded outside the body, the insertion tube portion can be formed by using the motor output shaft as a reference. The accuracy of the longitudinal axis center of the output shaft and the longitudinal axis center of the insertion tube is improved. This is preferred when the valve is arranged concentrically in the valve guide hole. Furthermore, when the box body is integrally formed with the motor box and the insertion tube, the number of parts can be effectively reduced. Further, according to the second feature of the present invention, the air valve is disposed between the stopper portion below the slider and the stopper portion at the upper end of the slider, and the downward stopper portion borrows the valve spring. It is configured with elastic pressure. Further, between the inner peripheral portion of the air valve and the outer peripheral portion of the slider, and between the outer peripheral portion of the valve and the inner peripheral portion of the slider, a shaft center longer than the motor output shaft and the valve guide hole are formed. Clearance with greater eccentricity in the longitudinal axis. According to the above, when the fixed arrangement box body is inserted into the throttle body insertion hole and the cylinder portion is inserted, the valve can be concentrically arranged in the valve guide hole, and the smooth movement characteristics of the valve can be achieved. That is, the valve is not mechanically fixed to the slider, but is elastically pressed by a valve spring. And because it forms the aforementioned gap, the gas 312XP / Invention Manual (Supplements) / 94-07 / 94109739 According to the application, the large elastic ball valve 11 200537017 can be guided along the gas valve. Lead holes move sideways to maintain a good concentric state. According to the third feature of the present invention, the air valve is on its introduction side, and the lower end of the motor output shaft is abutted and fixed to the stop portion on the introduction side provided at the bottom of the internally threaded hole of the slider. The extension side is fixed at the extension side stop portion provided on the inner diameter portion of the ring by abutting the upper part of the slider. Therefore, the initialization of the gas valve (initia 1 izati ο η) can be abutted from any You can start from a fixed position.

According to the fourth feature of the present invention, when carbon or the like generated from the engine enters the inside of the bypass ring from the bypass air passage, a lip portion (sea 1) of a seal (sea 1) ( 1 i ρ). Therefore, carbon and the like do not enter the motor, and the motor can be used stably for a long period of time. In addition, this gasket is formed in a ring shape, and is fixedly arranged between the inner bottom of the insertion tube portion and the upper end of the ring, and it is not necessary to provide a member for fixing the gasket. [Embodiment] An embodiment of an idle air control device for a fuel injection device according to the present invention will be described below. Fig. 1 is a longitudinal sectional view of an important part of an idle air control device including a throttle. FIG. 2 is a longitudinal sectional view of an enlarged and important part of the air valve portion of FIG. 1. FIG. Fig. 3 is a longitudinal sectional view of an enlarged and important part of the line A-A in Fig. 1. In addition, the same reference numerals are used for the same structural parts as those in FIG. 4. Μ is a stepping motor (hereinafter referred to as a motor), and its periphery is surrounded by a motor case 1 a made of a synthetic resin 12 312XP / Invention Specification (Supplement) / 94 · 〇7 / 94109 39 200537017 material. The lower end of the box 1 a is formed with a cylindrical insertion tube portion 1 b facing downward, and the motor box 1 a and the insertion tube portion 1 b are integrally formed into the box body 1. This box body 1 is formed by molding a motor M during injection molding of a synthetic resin material. The motor output shaft M a of the motor M is arranged to protrude into the insertion tube portion 1 b, and at the same time, is disposed with the insertion tube portion 1 b. Concentric. A male screw is formed on the outer periphery of the motor output shaft Ma. 2 is a ring-shaped ring fixedly disposed inside the insertion tube portion 1 b, and the ring φ 2 is pressed from the opening at the lower end of the insertion tube portion lb inside the insertion tube portion lb. At this time, the upper end 2a of the ring 2 is placed against the inner bottom portion 1c of the insertion tube portion 1b. Therefore, the ring-shaped gasket R disposed at the upper end 2a of the ring 2 is fixedly supported to the motor M side, and The lip portion Ra formed on the inner side of the seal 塾 R is arranged in sliding contact with the outer periphery of the motor output shaft Ma. Further, in the inner peripheral portion 2b of the collar 2, a restricting protrusion 2c is formed inwardly from the upper end 2a in Fig. 1 in a downward direction. This limiting protrusion 2 c is more apparent in FIG. 3.

Further, near the lower end of the inner peripheral portion 2 b of the collar 2, an extended side stop portion 2 d which is flatter toward the inner side than the inner peripheral portion 2 b is formed. 3 is a slider screwed onto the external thread of the motor output shaft Ma. An internally threaded hole 3 b is penetrated from the upper end 3 a downward, and an introduction side stop 3 c is formed at the lower end of the internally threaded hole 3 b. Furthermore, a stopper portion 3d extending to the side is formed at the upper end of the slider 3. Therefore, the stopper portion 3d is inserted into the groove 2c of the restriction protrusion 2c of the ring 2 and penetrated in the vertical direction. Assume. 13 312XP / Invention Manual (Supplement) / 94-07 / 94109739 200537017 In addition, the internal screw hole 3b of the slider 3 is screwed on the external thread of the motor output shaft Ma, and although it is arranged in the ring 2 The peripheral portion 2b is located inward, but the inner peripheral portion 2b of the ring 2 can move in the up and down direction of the slider 3 without any restriction. Numeral 4 denotes a cylindrical air valve disposed between the outer peripheral portion 3 f of the slider 3 and the inner peripheral portion 2 b of the ring 2. The lower end of the air valve 4 is disposed on the stop section 3g provided on the outer periphery of the lower end of the slider 3, and at the same time, the upper end of the air valve 4 is disposed below φ of the stop 3d. 5 is a valve spring contracted at the outer periphery 3 f of the slider 3, the lower end of which is fastened to the inner bottom of the gas valve 4, and the upper end of which is fastened to the anchoring portion 3d of the slider 3. According to the above, The air valve 4 can be kept pressed toward the stop section 3 g by the elastic force of the air valve spring 5, and the air valve 4 and the slider 3 can move synchronously in the vertical direction.

In addition, the insertion tube portion 1 b of the box body 1 having the above-mentioned structure is fitted into the peripheral groove 1 of the insertion tube portion 1 b inserted into the insertion hole 5 6 opened at one end 50 0 a of the throttle body 50. The fixing member 6 formed by f, and the box body 1 is fixed to the throttle body 50. According to the above, the air valve 4 is configured to be movable within the air valve guide hole 55, and this state is shown in FIG. Next, the function of the idle air control device of the present invention will be described. The starting conditions when the engine or ambient temperature is low are described below. When the engine is started, the synchronized self-ECU will output an electrical signal corresponding to 14 312XP / Invention Manual (Supplement) / 94-07 / 94109739 200537017 at a low temperature state. Range swivel. When the motor output shaft Ma rotates in one direction, the slider 3 is greatly pulled upward, and the air valve 4 is also pulled upward in the valve guide hole 55 in synchronization with the slider 3 Open the bypass air passage 54. As described above, a large amount of starting air can be supplied to the engine from the bypass air passage 54, and the engine can be started well in this low temperature state. In the above, the motor output shaft Ma is turned in one direction, and the slider 3 can be pulled upward because the restriction of the ring 2 fixed to the φ box body 1 is inserted into the groove 3e of the slider 3 The protrusion 2 c can inhibit the rotation of the slider 3, which is the result. Secondly, when the aforementioned start is completed and the engine warm-up operation is performed, the temperature of the engine will gradually increase, and the ECU will output an electrical signal to the motor M in response to the temperature rise.

The motor output shaft Ma rotates in the opposite direction from the one-way direction in accordance with the aforementioned electrical signal, whereby the slider 3 can be moved downward in the figure, and at the same time, the air valve 4 is synchronized with the slider 3 The inside of the valve guide hole 5 5 moves downward, and the opening of the bypass air path 54 is gradually reduced as the temperature rises. Therefore, the amount of air supplied to the engine in synchronization with the warm-up operation of the engine is gradually reduced without increasing the number of engine revolutions unnecessarily, and a good warm-up operation of the engine can be implemented. In addition, when the warm-up operation of the engine is completely completed, the slider 3 becomes the lowest position of the ring 2, and the air gap 4 becomes the highest position of the valve guide hole 5 5 synchronously. The lower position can close the opening of bypass 15 15312XP / Invention Manual (Supplement) / 94-07 / 94109739 200537017 Road 5 4 and end the engine start and warm-up operation. In addition, although the foregoing description has explained that the ambient temperature and the engine temperature are from the start to the end of the warm-up operation when the temperature is low, the motor M is input from the ECU because of the electrical signal corresponding to the temperature state. The electric signal operates and can be set to the optimal opening degree of the gas valve 4 according to the temperature state.

Here, according to the idle air control device of the present invention, a groove 3e and a restricting protrusion 2c are provided between the slider 3 and the ring 2, because it can inhibit the rotation of the slider 3, and at the same time, can make the slider 3 moves in the axial direction, and therefore, the gas valve 4 can be a circular gas valve 4 having the same cross section as the previous structure. The idling air control device using the previous wax element can be used as it is. In addition, since the motor case 1 a surrounding the outer periphery of the motor M and the insertion tube portion 1 b of the insertion hole 56 for the throttle body 50 are integrally formed as the case main body 1, it is possible to reduce the number of parts and miniaturization. In particular, it can improve the mountability for those who have a limited accommodation space for two-wheeled locomotive. Further, the gap S1 formed between the outer peripheral portion 3f of the slider 3 and the inner peripheral portion 4a of the gas valve 4 and the outer peripheral portion 4b of the gas valve 4 and the inner peripheral portion 2b of the ring 2 are formed. The gap S 2 is larger than the eccentric amount Z of the longitudinal axis XX of the motor output shaft Ma and the longitudinal axis YY of the valve guide hole 55. The idle air control device is to be assembled at a throttle of 50, The gas valve 4 can be reliably concentrically arranged in the valve guide hole 55 to maintain the good operating characteristics of the gas valve 4. In addition, the gas valve 4 can be arranged concentrically in the valve guide hole> 55 because the eccentricity amount Z has gaps S1, S2 for the first 16 312XP / Invention Specification (Supplement) / 94-07 / 94109739 200537017, and Since the air valve 4 is not mechanically fixed to the slider 3, the air valve spring 5 is allowed to be elastically pressed and moved in the diameter direction. The movement of the lead-in side (movement in the upward direction in the figure) of the slider 3 is fixed by the lead-in stop portion 3 c provided at the bottom of the internally threaded hole 3 b to abut against the lower end Mb of the motor output shaft Ma. By. This state is shown in the center line of Fig. 1 as shown on the right.

On the other hand, the movement of the extension side (movement in the downward direction in the figure) of the slider 3 is arranged to abut the inner side of the ring 2 by the lower surface of the retaining part 3 d provided above the slider 3. The bottom extension side stop portion 2 d is fixed. This state is shown in the center line of Fig. 1 as shown on the left. Based on the above, it can be initialized from any fixed position. On the outer periphery of the upper portion of the motor output shaft Ma, when the lip portion Ra of the seal R is slidingly arranged, carbon and the like entering the inner side of the ring 2 from the bypass air path 54 will not pass from the motor output shaft Ma. The outer periphery enters the motor M, and the motor M can be used stably for a long period of time. Furthermore, the motor box 1a can be used to surround the motor M to provide stability.

In addition, since the gasket R is held by the section in the motor case 1 a and the upper end 2 a of the ring 2, it is not necessary to prepare a special member for fixing the gasket R. [Brief Description of the Drawings] Fig. 1 shows a longitudinal sectional view of an embodiment of an idle air control device for a fuel injection device according to the present invention. 17 312XP / Invention Specification (Supplement) / 94-07 / 94109739 200537017 Fig. 2 is an enlarged half longitudinal sectional view of the important parts of the sliding part and the valve part of Fig. 1. FIG. 3 is an enlarged half longitudinal sectional view of an important part taken along the line A-A in FIG. 1. FIG. Figure 4 is a longitudinal section of an idle air control device of a conventional fuel injection device

Surface map. [Main component symbol: No. description] 1 Box body la Motor box lb Inserted into the barrel 1 c Inner bottom If Outer peripheral groove 2 Ring 2a, 3a Upper end 2b Ring inner peripheral 2 c Limiting protrusion 2d Extension side stop 3 Slider 3b Internally threaded hole 3c Leading side stop 3d Fastening stop 3e Groove 3f, 4b Outer circumference 3g Fastening section 4 Air valve 4 a Inner circumference 312XP / Invention Manual (Supplement) / 94-07 / 94109739 18 200537017 5 Air valve spring 6 Fixing member 50 Throttle 50a One end 5 1 Intake passage 51a Upstream side inlet passage 51b Downstream side inlet passage 52 Throttle valve shaft 53 Throttle valve 54 Bypass air passage 55 Air valve guide Leading hole 56 Inserting hole 60 Idle air control device 61 Wax box 61a Direct connection 61b Tube 62 PTC heater 63 Wax element 63a Output shaft 64a, 64b Connector 65 Insert tube 65a Upper tube 65b Fastening section 6 5c Lower barrel 312XP / Invention manual (Supplement) / 94-07 / 94] 09739 19 2005 37017

66 Actuator 66a Upper portion 66b Shaft portion 67 Spring 68 Air valve 69 Spring LI, L2 Wire M Motor Ma Motor m Outlet shaft Mb Motor output shaft Lower end R Seal gasket Ra Lip SI, S2 Clearance 312XP / Invention Specification (Supplement Pieces) / 94-07 / 94109739 20

Claims (1)

200537017 10. Scope of patent application: 1. An idle air control device for a fuel injection device. A throttle valve is arranged in an intake passage in a penetrating fluid, and the bypass of the throttle valve is connected to the upstream side of the throttle valve. The air passage and the flow path on the downstream side of the throttle valve are controlled by the air valve provided in the wide guide hole of the bypass air passage to control the idle air flowing in the bypass air passage. It is provided with: a motor case 1 a surrounding the motor M, and an insertion tube portion 1 b formed by opening downward from the motor case φ, which is formed by an externally molded case body 1; and is fixedly disposed on the case body 1 The cylindrical ring 2 inserted into the inner portion of the barrel lb; is screwed to the motor output protruding from the motor M to the inner side of the ring 2. The slider 3 on the outer periphery of the ring 2; and the inner periphery and the slider on the ring 2 Between the outer periphery of 3, the arrangement direction is locked, and at the same time, the gas valve 4 is slidably guided to the valve guide hole 5 5; and the slider 3 screwed to the motor output shaft is the ring 2 Stops its rotation, and at the same time, it is configured to allow movement in the axis direction. 3 and the slide valve member is moved to the synchronized axial direction, and the bypass air passage valve 4 to the valve opening of the guide hole 55 of the opening 54. 2. The idling air-control device of the fuel injection device according to item 1 of the patent application scope, wherein the air valve is arranged at a stop section 3 g provided on the lower periphery of the slider 3, and is provided on the slider. At the same time, the upper part of the captive part 3 is contracted by a gas spring 5 arranged on the outer periphery of the slider 3 312XP / Invention Manual (Supplement) / 94-07 / 94109739 The circle formed by Ma is decelerated on the shaft, and the air control end is controlled 3d outwards to press 21 200537017 toward the stop section 3g. Further, on the inner periphery of the valve 4 and the outer periphery of the slider 3 Between the part 3 f and the outer peripheral part 4 b of the gas valve 4, the inner peripheral part 2 b of the ring 2 is formed to have a length longer than the length of the motor output shaft M a and the axis X-X and the length of the valve guide hole 55. The direction axis Y-Y has a larger gap SI, S2. 3. The idling air-control device of the fuel injection device according to item 1 of the patent application scope, wherein a lower end Mb for stopping the motor output shaft Ma is provided at the bottom of the inner hole 3b of the slider 3 screwed to the motor output shaft. At the same time, a stop section 3 c of φ is provided, and at the same time, an extension-side stop section 2 d of a stop section section 3 d is provided on the inner bottom of the ring 2. 4. The idling air-control device of the fuel injection device according to item 1 of the patent application range, wherein a gasket R is disposed between the upper end 2 a of the inner bottom ring 2 of the insertion tube portion 1 b of the aforementioned box body to form A lip portion Ra inside the gasket is slidably connected to the outer periphery of the motor output shaft Ma. P 4a and direction of the ring Z Pneumatic control Thread entry side 3 Pneumatic control and R 312XP / Invention Specification (Supplement) / 94-07 / 94109739 22