TWI277691B - 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

1277691 IX. Description of the Invention: [Technical Field] The present invention relates to a fuel injection device that boosts fuel in a fuel tank by a fuel pump and supplies the boosted fuel injection to an engine by 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 idle speed (id 1 i ng ) is operated or when the idle speed (〇 ffid 1 ing ) is operated. [Prior Art]

Fig. 4 shows an idle air control device of the prior fuel injection device. As illustrated by Fig. 4, 50 is a throttle body through which the intake passage 51 is bored, and the intake passage 5 is opened and closed by the rotation of the butterfly throttle valve 53 attached to the throttle shaft 52. control. Further, the intake passage 51 is divided by the throttle valve 53 into an intake passage 5 1 a from the upstream side of the throttle valve 5 3 and an intake passage 5 from the downstream side of the throttle valve 53 1 b ; The intake passage 5 1 a on the upstream side is connected to an air filter (not shown), and the intake passage 5 1 b on the downstream side is connected to the engine by the intake pipe. 5 4 is a bypass air passage, one end of which is open to the intake 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, and the bypass passage 5 4 is bypassed to the throttle valve 53 The upper side and the lower side of the intake passage 5 1 are contacted. 55 is a valve guide hole connected to the bypass passage 54, and one end thereof is opened at one end of the throttle body 50 by the insertion hole 56. Further, the idle air control device 60 is configured as follows. Wax case 61 is a wax element 6 3 having a PTC heater 62 and 5 312XP/invention specification (supplement)/9107/94109739 1277691 enclosed therein, a PTC heater 6 2 The electrodes are connected to the connectors 64a, 64b in the direct coupler 61a formed integrally with the wax box 61, and further, the connectors 6 4 a, 6 4 b are successively connected. Wires L 1 , L 2 .

Further, the external thread formed outside the cylindrical portion 6 1 b extending below the wax box 61 is screwed into the inner circumference of the cylindrical portion 615a formed in the cylindrical insertion tube portion 65, Thereby, the insertion tube portion 65 is integrally attached to the lower side of the wax case 61, and the 6 6 is a cup-shaped operation body that is movably disposed inside the butterfly case 6 1 and the insertion tube portion 65, and the operation body The inner bottom portion of the 66 is abutted against the tip end of the output shaft 633a of the wax member 63 by the elastic force of the spring 67, and is energized by the attachment. That is, one end of the spring 67 is tied to the inner stopper portion 6 5 b formed on the inner side of the insertion cylinder portion 65, and the other end is restrained to the upper crocodile portion 6 6 a of the operating body 66. Further, the upper end of the air valve 68 is stopped by the spring 69 at the tip end of the shaft portion 66b extending downward from the bottom portion of the automatic body 66. As described above, the wax case 61 and the insertion tube portion 65 are integrally attached, and the inside thereof is disposed downward from the upper side in Fig. 4: the PTC heater 6, the wax member 63, the operating body 66, and the gas valve 68; The operating body 66 of the air valve 68 is elastically abutted against the output rod 63 3 a of the wax member 63 by the elastic force of the spring 67 to form the idle air control device 60. Further, the lower cylindrical portion 6 5 c of the insertion tube portion 65 of the idle air control device is inserted into the insertion hole 56 of the opening at one end 50 0 a of the throttle body 50, and the gas valve 68 is inserted and disposed. In the valve guide hole 5 5 . Further, in this state, the insertion cylinder portion 65 is screwed to the section 6 312XP by the fixing member (not shown)/invention description (supplement)/94-07/9410973 9 1277691 fluid 50 and then idle air control The device 60 is fixedly disposed in the throttle body 5 Ο According to the previous idle air control device, when the engine is started, the heat expansion and contraction material in the wax member 63 contracts, and the gas valve is small due to the small amount of the output shaft 63 3 a 68 is in the upper position, so that the bypass passage 54 can be greatly opened, and the engine is started in response to the supply of air to the engine in the opening of the bypass passage 54. On the other hand, in synchronization with the start of the engine, the PTC heater 62 is supplied with current by Φ E C U or a battery (not shown), so that the P T C heater 62 generates heat to heat the wax element 633.

When the wax element 63 is heated, the internal heat expansion and contraction material expands to gradually increase the amount of protrusion of the output shaft 63 3 a, and the gas valve 68 causes the side air passage in synchronization with the increase in the amount of protrusion of the output shaft 6 3 a. The opening of 54 is gradually reduced, and the amount of air supplied from the bypass passage 5 to the downstream intake passage 5 1 b can be reduced in response to the temperature rise of the engine, thereby changing from the warm-up operation of the engine to the normal It is running at an idle speed. SUMMARY OF THE INVENTION (Problems to be Solved by the Invention) According to the prior idle air control device, the wax member 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 633a of the wax member 630 is adapted to the temperature state of the engine, and a difference occurs between the ambient temperature and the outstanding characteristic of the output shaft 63a. For example, when the ambient temperature is at a high temperature, the amount of protrusion of the output shaft 63 3 a becomes large, and the valve 6 8 has a tendency to block the opening of the bypass passage 5 4 , in 312 XP / invention manual (supplement) / 94 -07/94 ] 09739 1277691 Sufficient air cannot be supplied when the engine is started. Further, the amount of protrusion of the output shaft 63a is displaced by the heat generated by the PTC heater 62, the heating of the PTC heater 62 of the 躐 element 63, and the volume change of the heat expansion material in the sample element 63, so that the output shaft 63 The response speed of a is slow, and it is difficult to control the amount of minute air. The idling air control device of the present invention has been made in view of the above problems, and an object of the invention is to provide an eccentricity of an output shaft and a valve of a motor that can reliably absorb a driving body of a driving valve when the wax element is changed to a motor. The gas Φ valve guide hole allows the valve to be properly concentrically configured. Moreover, it is possible to use a cylindrical valve which is disposed in a conventional circular cross-section valve guide hole, and has interchangeability with a conventional idle air control device. _ The idle air control device of the fuel injection device thus formed. (Means for Solving the Problem) In order to achieve the above object, the idle air control device for a fuel injection device according to the present invention has a throttle portion that is disposed in an intake passage that is disposed in a throttle body.

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 by the throttle valve bypassing the air passage, and then movably disposed in the air valve guide connected to the bypass air passage In the idle air control device of the fuel injection device that controls the amount of bypass air flowing in the bypass passage, the first feature is that the idle air control device includes a motor case surrounding the motor. And an insertion cylinder formed by opening the motor casing toward the lower side, which is formed by an externally molded box body; 312XP/Invention Manual (Repair)/94-07/94109739

1277691 a cylindrical collar fixedly disposed inside the insertion tube portion of the box body; a sliding member screwed around the motor output shaft protruding from the motor toward the inner side of the ring; and a ring Between the inner circumference and the outer circumference of the slider, the valve is disposed in the axial direction, and is simultaneously guided to the air valve guide hole; the slider screwed to the motor output shaft is a ring While being inhibited from rotating, at the same time, it is configured to be allowed to move in the axial direction. Further, the gas valve and the slider are synchronously moved to the axial direction, and the valve is controlled to open the opening of the bypass passage of the valve guide hole opening. Further, in addition to the first feature described above, the present invention is characterized in that the gas valve is disposed between the stopper portion provided on the outer periphery of the lower end of the slider and the stopper portion at the upper end of the slider. At the same time, the air valve spring disposed on the outer circumference is configured to be pressed toward the locking portion, further between the inner peripheral portion of the air valve and the outer peripheral portion of the slider, and the inner circumference of the outer circumference ring of the air wide Between the portions, a gap larger than the eccentricity of the longitudinal axis of the axial valve guide hole in the longitudinal direction of the motor output shaft is formed. Further, in addition to the first feature described above, the third feature of the present invention is that the bottom of the female screw hole of the slider of the motor output shaft is provided with a lead-side stop portion that is connected to the lower end of the output shaft, and is also in the circle. The inside of the ring is provided with an extension side stop portion of the upper stop portion of the stop slider. In addition to the first feature described above, the fourth feature of the present invention is that the case body is inserted into the inner bottom portion of the tubular portion and A gasket is disposed between the upper ends of the ring, and the lip formed on the inner side of the gasket is slid to the motor 312XP/invention specification (supplement)/94-07/94109739 Set the sliding parts, the front part and the heart and the front end of the snail stop the dense output 9

1277691 The outer circumference of the shaft. According to the first aspect of the present invention, when the motor is driven and the motor is rotated in the output direction, the slider is prevented from moving by the rotation of the ring, so that the valve is also moved downward in synchronization with the slider. . Since the air valve is guided to move downward in the guide hole of the air valve, and the air passage in the opening guide hole is closed, the air valve is closed in response to the single direction of the motor. In addition, when the motor output shaft rotates in the maximum direction in one direction, the slider moves in the lowermost direction, and the air valve can be kept in the valve guide hole and the open air passage is fully closed. On the other hand, when the motor output shaft is rotated in the other direction, since the ring is restrained from rotating and moves in the upward direction, the motor output shaft moves in the upward direction in synchronization with the slider. When the air valve moves upward, the air passage is opened beside the opening in the air valve guide hole, and the air valve can be opened according to the amount of rotation in the motor direction. When the motor output shaft rotates to the other side, the slider will be the most Moving in the upward direction, the air valve can be fully opened adjacent to the opening in the air guide hole of the air valve. According to the first feature, the slider is screwed to the output shaft of the motor, and the ring is restrained from rotating, and the movement in the axial direction is allowed, and the air valve and the slider are locked in the axial direction. Therefore, the gas valve and the slider can synchronously move the opening of the bypass air passage which controls the opening in the air valve guide hole in the air valve guide hole. By suppressing the rotation of the slider between the ring and the ring, it is not necessary to use the gas 312XP/invention manual (supplement)/94-07/94109739 shaft pair to the next and at this time, the valve will rotate When the bypass valve of the bypass valve is also moving, the other direction is kept at the most for the hunting circle, and the valve can be set to 10

1277691 The rotation suppression means, and the cross-sectional shape of the gas valve can be formed into a circular shape. In this case, the circular valve guide hole of the cross section which is made by the idle speed control means of the prior wax element can be used, and the idle control device of the present invention can be easily mounted on the previous throttle body and made interchangeable. Further, when a single box body is formed with a motor case surrounding the outer circumference of the motor and an insertion tube portion extending downward, when the case is molded outside the case, since the motor output shaft is formed as a reference, the insertion tube portion can be formed. Improve the accuracy of the center of the axial direction of the output shaft and the axial center of the insertion barrel. This is preferable when the air valve is guided concentrically in the valve guide hole. Further, when the box body is integrally formed with the motor case and the insertion tube portion, the number of parts is effectively reduced. Further, according to the second aspect of the present invention, the air valve is disposed between the stopping portion under the slider and the stopping portion of the upper end of the slider, and at the same time, the downwardly locking portion is deflated The spring is elastically pressed. Further, between the inner peripheral portion of the gas 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, an axial center of the output shaft of the motor and a valve guide hole are formed. A gap with a larger amount of eccentricity in the axial direction of the longitudinal direction. According to the above, when the insertion box body insertion tube portion is inserted into the insertion hole of the throttle body, the gas valve can be concentrically arranged in the valve guide hole, and the smooth movement characteristics of the valve can be obtained. That is, the gas valve is not mechanically fixed to the slider, but is elastically pressed by the gas spring. And because of the formation of the aforementioned gap, the gas 312XP / invention manual (supplement) / 94-07 / 94109739 according to the use of the extension of the horse with the end of the gas to the large valve 11 1277691 can be guided along the valve The pilot holes move sideways to maintain a good concentric state. Further, according to the third aspect of the present invention, the air-width is on the introduction side thereof, and the lower end of the motor output shaft is abutted and fixed to the introduction-side stop portion provided at the bottom of the internally threaded hole of the slider, and on the other hand, the gas valve is The extension side is fixed to the upper side stop portion of the inner diameter portion of the ring ring by the upper crotch portion of the slider. Therefore, the initialization of the gas valve (initia 1 izati ο η ) can be abutted from any one. A fixed position can be used at the beginning.

Further, according to the fourth aspect of the present invention, when the side air passage enters the inside of the ring due to carbon or the like generated by the engine, the lip portion of the seal (sea 1) is disposed outside the motor output shaft ( 1 i ρ), therefore, carbon or the like does not enter the motor, and the motor can be used stably for a long period of time. Further, the gasket is formed in a ring shape and is fixedly disposed between the inner bottom portion of the insertion cylinder 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 of the present invention will be described below. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a longitudinal sectional view showing an essential part of an idle air control device including a throttle body. Figure 2 is a longitudinal cross-sectional view showing an enlarged portion of the gas valve portion of Figure 1. Fig. 3 is a longitudinal sectional view showing an enlarged portion of the A-A line of Fig. 1. Further, the same components as those in Fig. 4 are denoted by the same reference numerals. Μ is a stepping motor (hereinafter referred to as a motor) surrounded by a motor case 1 a made of synthetic resin 12 312 ΧΡ / invention specification (supplement) /94-07/94109739 1277691 material, from the motor box 1 a A cylindrical insertion tube portion 1b is formed at a lower end downward, and the motor case 1a and the insertion tube portion 1b are integrally formed with the case body 1. When the synthetic resin material is injection molded, the casing body 1 is molded to form a motor, and the motor output shaft Ma of the motor is disposed to protrude into the insertion cylinder portion 1b, and the insertion cylinder portion 1b is disposed. Concentric. Further, an external thread is formed on the outer circumference of the motor output shaft Ma. 2 is an annular ring that is fixedly disposed inside the insertion tube portion 1b, and the ring ring Φ2 is pressed into the insertion tube portion 1b from the opening at the lower end of the insertion tube portion 1b. At this time, the inner bottom portion 1c of the insertion cylindrical portion 1b abuts against the upper end 2a of the ring 2, so that the annular gasket R disposed at the upper end 2a of the ring 2 is fixedly supported to the side of the motor, and The lip portion formed by the inner side of the gasket R is slidably disposed on the outer circumference of the motor output shaft Ma.

Further, in the inner peripheral portion 2b of the ring 2, a restricting projection 2c which is downward in the direction from the upper end 2a in Fig. 1 is formed inward. This limiting projection 2c is more apparent in FIG. Further, in the lower end of the inner peripheral portion 2b of the ring 2, a flat side stop portion 2d which is flatter inward than the inner peripheral portion 2b is formed. 3 is a slider which is screwed on the external thread of the motor output shaft Ma, and an internally threaded hole 3b is bored downward from the upper end 3a, and a lead-side stop portion 3c is formed at the lower end of the internally threaded hole 3b. Further, since the upper end portion of the slider 3 is formed with a retaining portion 3d extending to the side, the groove 3c of the restricting projection 2c into which the retaining portion 3d is inserted into the loop 2 is penetrated in the up-and-down direction. Assume. 13 312XP/Invention Manual (Supplement)/94-07/94109739 1277691 Further, the internal threaded hole 3b of the slider 3 is screwed on the external thread of the motor output shaft Ma, and although it is disposed inside the ring 2 The inside of the peripheral portion 2b, but the inner peripheral portion 2b of the loop 2 is moved in the downward direction of the slider 3 without any restriction. 4 is a cylindrical air valve disposed between the outer peripheral portion 3f of the slider 3 and the inner peripheral portion 2b of the ring 2. The lower end of the gas valve 4 is disposed on the stopper portion 3g provided on the outer periphery of the lower end of the slider 3, and the upper end of the gas valve 4 is disposed to face the lower portion of the crotch portion 3d. 5 is a valve spring that is contracted to the outer peripheral portion 3 f of the slider 3, the lower end of which is locked to the inner bottom of the air valve 4, and the upper end thereof is fastened to the locking portion 3d of the slider 3 according to the above, The gas valve 4 can be held in a state of being pressed toward the stopper portion 3g by the elastic force of the valve spring 5, and the gas valve 4 can be moved in the vertical direction in synchronization with the slider 3. Further, the insertion tube portion 1b of the box body 1 having the above configuration is fitted

The fixing member 6 which is inserted into the outer peripheral groove 1 f of the cylindrical portion 1 b inserted into the insertion hole 56 which is open at one end 50 0 a of the throttle body 50, and the case body 1 is fixed to the throttle body 50 . According to the above, the gas valve 4 is configured to be movable within the air wide guide hole 55, as shown in the figure. Next, the action of the idle air control device of the present invention will be described. The starting state of the engine or ambient temperature is indicated. When the engine is started, the synchronized ECU is output to the motor in response to the electrical signal in the low temperature state. The motor Μ is in a single direction according to the aforementioned signal. Range rotation. When the motor output shaft Ma is rotated in one direction, the slider 3 is greatly pulled up in the upward direction, and the gas valve 4 is also pulled up in the upward direction of the valve guide hole 55 in synchronization with the slider 3, so that The bypass air passage 54 is open. According to the above, a large amount of starting air can be supplied to the engine by the bypass air passage 504, and the engine can be started well in the low temperature state. Further, in the above, the motor output shaft Ma is rotated in one direction, and the slider 3 can be pulled up 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 projection 2c can suppress the rotation of the slider 3, as a result. Next, when the start-up is completed, the engine temperature is gradually increased when the engine is warmed up, and the ECU outputs an electrical signal corresponding to the temperature rise to the motor 。. The motor output shaft Ma is rotated in the other direction opposite to the aforementioned one direction in accordance with the aforementioned electric signal, whereby the slider 3 is movable in the downward direction of the drawing, and at the same time, the gas valve 4 is also synchronized with the slider 3 The valve guide hole 5 5 moves inward in the downward direction, and as the temperature rises, the opening of the bypass passage 54 gradually decreases. Therefore, as the warm-up operation of the engine is synchronized, the amount of air supplied to the engine is gradually reduced, so that the engine does not have an unnecessary increase in the number of revolutions, and the engine can be warmed up. Further, when the warm-up operation of the engine is completely completed, the slider 3 is disposed at the lowest position of the ring 2, and the synchronized air valve 4 is also disposed at the most position of the valve guide hole 55. In the lower position, the opening of the bypass ventilator 15 312XP/invention manual (supplement)/94-07/94109739 1277691 is closed, and the start of the engine and the warm-up operation are finished. Further, although the above description has been made of the case where the ambient temperature and the engine temperature are at the low temperature state from the start to the end of the warm-up operation, the motor Μ is input from the ECU because of the electrical signal due to the temperature state, so the motor Μ will respond accordingly. It is operated by an electrical signal and can be set to the optimum degree of opening of the gas valve 4 in response to the temperature state. Here, according to the idle air control device of the present invention, the groove 3 e and the restricting projection 2 c are provided between the slider 3 and the ring 2, since it can suppress the rotation of the slider 3 Φ, and at the same time, can be slipped The member 3 is moved in the axial direction, and therefore, the gas valve 4 can use the gas valve 4 having a circular cross section which is formed in the same manner as before. The idle air control device of the present invention can be used as it is in the idle air control device using the previous wax member. Further, since the casing 1b is formed by inserting the cylindrical portion 1b of the motor casing 1a surrounding the outer circumference of the motor casing and the insertion hole 56 of the counterfluid fluid 50, it is possible to achieve a reduction in the number of parts and miniaturization. In particular, it is possible to improve the mountability in a space where the storage space of the two-wheeled vehicle is limited.

Further, the gap S 1 formed between the outer peripheral portion 3 f of the slider 3 and the inner peripheral portion 4 a of the gas valve 4 and the outer peripheral portion 4 b formed on the outer periphery of the air gap 4 and the inner peripheral portion 2 b of the ring 2 The gap S 2 is formed to be larger than the eccentric amount Z of the longitudinal direction axis XX of the motor output shaft Ma and the longitudinal direction axis Y_Y of the valve guide hole 55, and the idle air control device is to be assembled at the throttle body 50 The gas valve 4 can be surely arranged concentrically in the valve guide hole 55 to maintain good operating characteristics of the valve 4. Further, the gas valve 4 can be concentrically arranged in the gas valve guide hole 55 because the eccentric amount Z has a gap S1, S 2 and a gas valve for the first 16 312 ΧΡ / invention description) /94-07/94109739 1277691 The pair of sliders 3 are not mechanically fixed, and thus the valve spring 5 is allowed to be elastically pressed and moved in the radial direction. Further, the movement of the introduction side of the slider 3 (movement in the upward direction in the drawing) is such that the introduction side stop portion 3c of the bottom of the internal thread hole 3b abuts against the lower end Mb of the motor output shaft Ma. Being fixed. This state is shown in the center line of Fig. 1 as shown in the right part. On the other hand, the Φ movement of the extension side (movement in the downward direction in the drawing) of the slider 3 is abutted in the ring 2 by the lower surface of the stopper portion 3d which is provided above the slider 3. The extension side stop portion 2d of the bottom portion is fixed. This state is shown in the center line of Fig. 1 as shown on the left side. According to the above, it can be initialized from any fixed position.

Further, when the lip portion Ra of the gasket R is placed on the outer circumference of the upper portion of the motor output shaft Ma by sliding, the carbon or the like entering the inside of the ring ring 2 from the bypass air passage 54 does not output the shaft Ma from the motor. The outer circumference enters the motor cymbal, and the motor Μ can be used for a long period of time. Further, the circumference of the motor casing around the motor casing can be given stability together with the above. Further, since the gasket R is held by the segment in the motor casing 1a and the upper end 2a 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 is a longitudinal sectional view showing an embodiment of an idle air control device for a fuel injection device according to the present invention. 17 312XP/Invention Manual (Supplement)/94-07/94109739 1277691 Fig. 2 is an enlarged half longitudinal sectional view of an important part of the slider and the valve portion of Fig. 1. Fig. 3 is an enlarged half longitudinal sectional view of an important portion of the A-A line of Fig. 1. Figure 4 is a longitudinal cross-sectional view showing an idle air control device of a prior fuel injection device.

[Main component symbol description] 1 Λ/r phase body la motor case lb insertion tube part 1 c inner bottom If outer circumference groove 2 ring 2a, 3 a upper end 2b inner circumference of the ring 2 c restriction protrusion 2d extension side stop Part 3 Sliding member 3b Internal threaded hole 3c Leading side stop portion 3d Resting portion 3e Groove portion 3f, 4b Outer peripheral portion 3g Stop portion 4 Air valve 4 a Inner peripheral portion 312XP / Invention manual (supplement) / 94-07/ 94109739 18 1277691 5 6 50 5 0 a 51 51a 5 1b 52 #53 54 55 ^ 56 60 61 61a 61b

62 63 63a 64a, 64b 65 65a 65b 65c Air valve spring fixing member throttle body One end of the intake passage on the upstream side of the intake passage The intake passage on the downstream side of the intake passage throttle valve shaft throttle valve side air passage valve guide hole insertion hole Idle air control device, direct connection of the tube, PTC heater, wax element, output shaft connector, insertion of the upper part of the tube, the lower part of the tube, the lower part of the tube, 312XP, invention manual (supplement) /94-07/94109739 1277691

66 Action body 66a Upper jaw 6 6b Shaft 67 Spring 68 Valve 6 9 Spring LI, L2 Lead 马达 Motor Ma Motor output shaft Mb Motor output shaft lower end R Seal R a Lips SI, S2 Clearance 312XP / Invention Instruction manual (supplement) /94-07/94109739 20

Claims (1)

1277691 X. Patent application scope: 1. An idle air control device for a fuel injection device, wherein a throttle valve is arranged in an intake passage through a fluid, and the upstream side of the throttle valve is connected by a bypass of the throttle valve The intake passage and the passage on the downstream side of the throttle valve are controlled by a pneumatic valve that is movably disposed in the pilot passage of the bypass passage valve to control the idle air flowing in the bypass passage, and is characterized in that The motor case 1 a surrounding the motor casing and the insertion cylinder portion 1 b formed from the motor casing ♦ toward the lower side are integrally molded into the box body 1; the casing body 1 is fixedly disposed. a cylindrical ring 2 inserted into the inner portion of the tubular portion 1b; ^ a sliding member 3 screwed to the outer periphery of the motor protruding from the motor to the inner side of the ring 2; and a slippery inner circumference of the ring 2 Between the outer circumferences of the members 3, the arrangement direction is blocked, and at the same time, the air valve 4 is guided to the air valve guide hole 5 5; and the slider 3 screwed to the motor output shaft is the ring 2 And the rotation is stopped, and at the same time, it is configured to be allowed to move in the axial direction, and is advanced. 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 idle air system of the fuel injection device of claim 1, wherein the air valve is disposed in a stopper portion 3g provided on a lower circumference of the slider 3, and is provided in the slider 3 between the upper end of the shackle and at the same time, by the air valve spring 5 312XP / invention manual (supplement) / 9 ^ 07 / 94109 ~ 39 arranged in the outer periphery of the slider 3 The ring axis Ma of 1 a is suppressed on the axis, and the outer side of the air control end 3d is controlled to be pressed toward the stopper portion 3g at 21 1277691, and further, the inner peripheral portion 4a of the gas valve 4 and the slider 3 are Between the outer peripheral portion 3 f and between the outer peripheral portion 4 b of the gas valve 4 and the inner peripheral portion 2 b of the ring 2 , the length of the longitudinal axis XX and the valve guide hole 55 of the motor output shaft Ma are formed. The eccentricity Z of the direction axis Y_Y is larger than the gaps SI, S2. 3. The idle air control device of the fuel injection device of claim 1, wherein a lower end of the output shaft Ma of the motor is provided at the bottom of the internally threaded hole 3b of the slider 3 screwed to the motor output shaft. The introduction side Φ of the Mb is the stop portion 3c, and at the inner bottom portion of the ring 2, an extension side stop portion 2d that stops the upper stopper portion 3d of the slider 3 is provided. 4. The idle air control device of the fuel injection device of claim 1, wherein a gasket R is disposed between the inner bottom portion of the insertion cylinder portion 1b of the tank body and the upper end 2a of the ring 2, and The lip portion Ra formed on the inner side of the gasket R is slidably attached to the outer circumference of the motor output shaft Ma. 22 312XP / invention manual (supplement) /94-07/94109739