CN100441846C - Suction Negative Pressure Detection Device for Throttle Valve Body - Google Patents

Abstract

The invention provides a suction pipe negative pressure device, which does not need to enlarge the positioning protrusion of the sensor box and the positioning concave hole of the pressing plate, and can maintain a good buckle state, and at the same time enlarge the connector lead-out of the sensor box Freedom to choose direction. A regular hexagonal positioning protrusion (2) is arranged on the top of the sensor box (1). The first hexagonal positioning recessed hole (5) with apex corner recesses (5a, 5b...) and the first hexagonal positioning recessed hole (5) corresponding to the first hexagonal positioning recessed hole (5) are provided on the pressing plate (4). The second hexagonal positioning concave hole (6) with a phase of 30 degrees, with respect to the reference line XX, the apex ( 5a1). By using the pressing plate (4) upside down with respect to the reference line XX, the direction of the connector can be selected from 24 positions.

Description

Suction Negative Pressure Detection Device for Throttle Valve Body

technical field

[0001] The present invention relates to a fuel pump that boosts the fuel in a fuel tank, injects the fuel into an engine through a fuel injection valve, and detects the intake air in the intake passage through a pressure sensor. The suction negative pressure detection device of the throttle valve body with negative pressure.

Background technique

In the suction negative pressure detecting device of existing throttle valve body, comprise the special wish No. 2004-270819 of the applicant of this case.

According to the above invention, on the upper bottom of the sensor box, the positioning protrusions having the shape of a regular hexagon having six corner protrusions are formed.

On the other hand, on the pressing plate, the positioning concave holes of the apex recesses are perforated at intervals of 30 degrees, and the number of the positioning concave holes is the number of the regular hexagonal apex protruding parts forming the above-mentioned positioning part. 2 times of , that is, twelve.

Then, the pressing plate is arranged on the upper bottom of the sensor box, and the sensor positioning protruding part is buckled in the positioning concave hole of the pressing plate. In this state, the pressing plate is screwed and fixed to the throttle valve. physically.

As mentioned above, the positioning of the sensor box (especially the connector with terminals) is realized by the way that the positioning protruding part of the sensor box is engaged in the desired positioning concave hole, and by pressing the plate, the sensor box is directed toward the node. The flow valve body is threaded and fixed.

Patent Document 1: Japanese Patent Application No. 2004-270819

According to existing suction negative pressure detection device, the positioning protruding part of sensor box is formed as regular hexagon, on pressing plate, the positioning recessed hole with 12 apex recesses is perforated, and it is positioning protruding part Twice the six corner projections of the sensor box, whereby the sensor box can select twelve rotational positions at intervals of 30 degrees in its rotational direction.

On the other hand, when the throttle body having such a negative pressure detection device is mounted on a vehicle, the opening position of the connector having the terminal (タミナナル) of the sensor box, that is, the direction in which the connector is pulled out varies depending on the vehicle. However, if there is a change, if the rotation direction position is selected at intervals of 30 degrees, the degree of freedom of selection of the drawing direction of the connector will be reduced, and it will be difficult to adapt to various vehicles.

Here, it has been studied to change the interval of the corner recesses of the positioning recesses from 30 degrees to 15 degrees to form 24 corner recesses. Part of the protruding part of the top corner is shortened, and a sufficient snap action cannot be maintained against the rotational force of the sensor box. That is, the portion where the corner recesses and the corner protrusions are caught is reduced.

In addition, the buckle portion of the vertex recess increases as the diameter of the regular hexagon of the positioning recess increases, but this will lead to an increase in the size of the sensor box and the pressing plate, which is not a preferable solution.

Furthermore, it is possible to arrange the drawing-out direction of the connector at a desired position by manufacturing the throttle body and the pressing plate, but this will increase the manufacturing cost, and thus is not preferable.

Contents of the invention

The technical problem to be solved by the invention

The suction negative pressure detection device involved in the present invention is intended to solve the poor coordination problem existing in the suction negative pressure detection device on the above-mentioned throttle valve body, without the need for large-scale positioning protruding parts and positioning concave holes. It is possible to maintain a good buckling state between the apex protruding part of the positioning protruding part and the apical recess of the positioning concave hole, and compared with the past, the lead-out direction of the connector with the terminal of the sensor box can be freely selected, and it can be used in vehicles. Excellent mountability.

A technical solution to the technical problem

The suction negative pressure detecting device on the throttle valve body involved in the present invention, in order to realize above-mentioned object, when disposing pressure sensor in sensor box, from the output signal of pressure sensor, by the connection to sensor box output from protruding terminals inside the device,

The cylindrical inner wall of the sensor box is rotatably inserted and arranged on the cylindrical hub protruding from the throttle body, and the sensor box is pressed and fixed by screwing and fixed on the throttle body. board, characterized by:

On the upper part of the sensor box, a regular hexagonal positioning protruding part with a corner protruding part is provided,

On the other hand, on the pressing plate, the first hexagonal positioning concave hole with the vertex concave part snap-fitted with the apex protruding part of the regular hexagonal positioning protruding part and relative to the first six The polygonal positioning concave hole is the second hexagonal positioning concave hole with a phase of 30 degrees. When the core is arranged, the first apex angle of the first hexagonal positioning concave hole is formed at an inclination of 7.5 degrees relative to the reference line. the apex of the recess,

Furthermore, mounting holes and positioning holes are provided on the pressing plate, and when the pressing plate is turned upside down on the reference line, the positions are mutually symmetrical with respect to the reference line.

[0006] In addition, the second feature of the present invention is that, on the basis of the first feature, the mounting holes and positioning holes are perforated on the reference line.

The effect of the invention

According to the first feature of the present invention, toward the positioning protruding part that is formed by the regular hexagon of sensor box, the first and second hexagonal positioning concave holes of the pressing plate are buckled and set, and in this state, the pressing plate Threaded against the throttle body and secured. As mentioned above, the sensor box is clamped between the pressing plate and the throttle body to be fixed, and the rotation of the sensor box is through the apex protruding part of the positioning protrusion of the sensor box snapping to the top of the hexagonal positioning concave hole of the pressing plate. Corner recesses are suppressed.

Then, the first hexagonal positioning concave hole and the second hexagonal positioning concave hole with a phase of 30 degrees relative to the first hexagonal positioning concave hole are perforated concentrically on the pressing plate, and then relative to the reference line, The apex of the first vertex recess of the first hexagonal positioning concave hole is formed with an inclination of 7.5 degrees. When the pressing plate is arranged on the upper part of the sensor box in a frontal state, the hexagonal positioning hole can be arranged at 12 sets of angular positions. . In addition, when the pressing plate is rotated from the front state on the basis of the reference line and placed on the upper part of the sensor box in the reverse state, the hexagonal positioning is arranged at 12 new angular positions different from the 12 angular positions in the surface state. hole.

As mentioned above, it can be selectively used in the front state and the reverse state, and the apex recesses of the hexagonal positioning holes can be arranged at 24 sets of angular positions at intervals of 15 degrees, which can greatly improve the rotation of the connector formed on the sensor. The degree of freedom of selection of the extraction position in the direction can greatly improve the mountability on the vehicle.

In addition, the first hexagonal positioning hole and the second hexagonal positioning hole are formed at a phase of 30 degrees as in the past, so the length of the snap part on the corner recess of the positioning hole is not shortened. , It can maintain the same snapping between the corner recess and the corner protrusion as in the past, and can maintain a sufficient snapping force against the rotational force of the sensor box.

In addition, on the pressing plate, when the pressing plate is turned forward and backward on the reference line, mounting holes and positioning holes are provided at the symmetrical positions of the reference line. Press the plate forward and reverse.

In addition, according to the second feature of the present invention, the mounting hole and the positioning hole are pierced on the reference line, so when pressing the plate forward and backward on the reference line, it is not necessary to increase the width of the pressing plate, and the pressing plate can be realized. board miniaturization.

Description of drawings

Fig. 1 is the longitudinal sectional view of the sensor box that is used for the suction negative pressure detecting device on the throttle valve body involved in the present invention;

Fig. 2 is the top plan view of Fig. 1;

Fig. 3 is a top plan view of the pressing plate used for the suction negative pressure detection device on the throttle body of the present invention;

Fig. 4 is the pressing plate shown in Fig. 3, which is a top plan view of the pressing plate in a front configuration state;

Fig. 5 is a longitudinal sectional view of the suction negative pressure detection device on the throttle valve body involved in the present invention;

Figure 6 is a top plan view of Figure 5;

FIG. 7 is a top plan view of the pressing plate shown in FIG. 3 in a front configuration state.

Symbol description

1. Sensor box

2. Locating overhangs

2a, 2b...Top corner protrusions

4. Press plate

5. The first hexagonal positioning recess

5a, 5b... Corner recesses

6. The second hexagonal positioning recess

6a, 6b... Corner recesses

7. Mounting hole

8. Positioning hole

Detailed ways

[0009] Hereinafter, an embodiment of the suction negative pressure detecting device of the throttle valve body according to the present invention will be described according to the accompanying drawings.

FIG. 1 is a longitudinal sectional view of key parts of a sensor box equipped with a pressure sensor, and FIG. 2 is a top plan view of FIG. 1 .

Reference numeral 1 denotes a sensor box, in which a pressure sensor S is fixedly arranged with an adhesive material P made of synthetic resin.

The sensor box 1 is formed with a cylindrical wall portion 1a with a large diameter hole and a small diameter hole in succession and opens downward, and a regular hexagonal positioning protrusion 2 protrudes upward from the upper bottom portion 1b.

The positioning protrusion 2 is formed with six corner protrusions 2a, 2b, 2c, 2d, 2e, 2f at intervals of 60 degrees.

In addition, a connector 1c is integrally formed on the right side of the sensor box 1, and inside the connector 1c, the inner end of the protruding terminal 3 and the sensor end Sa protruding from the pressure sensor S can be electrically connected by welding. connect.

[0010] Next, the pressure plate 4 for pressing and fixing the sensor box 1 to the throttle valve body will be described with reference to accompanying drawing 3 .

The pressing plate 4 is flat, and on the right side in the figure, a positioning concave hole is perforated.

The positioning concave hole is composed of a first hexagonal positioning concave hole and a hexagonal second hexagonal positioning concave hole because it is buckled with the positioning protrusion 2 of the sensor box 1 .

The first hexagonal positioning recessed hole 5 has six apex corner recesses 5a, 5b, 5c, 5d, 5e, 5f at intervals of 60 degrees, and the second hexagonal positioning recessed hole 6 is at intervals of 60 degrees. In this way, there are six apex corner recesses 6a, 6b, 6c, 6d, 6e, 6f, and the first hexagonal positioning concave hole 5 and the second hexagonal positioning concave hole 6 are concentrically arranged. The first hexagonal positioning concave hole 5 is represented by a solid line and a dotted line, and the second hexagonal positioning concave hole 6 is represented by a solid line and a dotted line.

Then, special attention should be paid to arranging the apex 5a1 of the first apex corner recess 5a of the first hexagonal positioning recess 5 at an inclination of 7.5 degrees with respect to the reference line X-X extending in the horizontal direction.

And the first hexagonal positioning concave hole 5 and the second hexagonal positioning concave hole 6 are arranged at a phase of 30 degrees. The phase of 30 degrees means that, for example, the apex 5a1 of the first hexagonal positioning recess 5a and the apex 6a1 of the second hexagonal positioning recess 6a are arranged alternately by 60 degrees.

As mentioned above, the first hexagonal positioning concave hole 5 is based on the reference line X-X, the first vertex recess 5a at the 7.5 degree position in the counterclockwise direction, the second vertex recess 5b at the 67.5 degree position, The third corner recess 5c at 127.5 degrees, the fourth corner recess 5d at 187.5 degrees, the fifth corner recess 5e at 247.5 degrees, and the sixth corner recess 5f at 307.5 degrees. On the other hand, the second hexagonal positioning concave hole 6 is based on the reference line X-X, the first vertex recess 6a at the 37.5 degree position in the counterclockwise direction, the second vertex recess 6b at the 97.5 degree position, The third corner recess 6c at the position of 157.5 degrees, the fourth corner recess 6d at the position of 217.5 degrees, the fifth corner recess 6e at the position of 277.5 degrees, and the sixth corner recess 6f at the position of 337.5 degrees.

That is, as for the positioning recesses, through the first hexagonal positioning recesses 5 and the second hexagonal positioning recesses 6 , apex corner recesses are arranged at positions that divide the circumference into twelve equal parts as described above.

This can be better understood by enlarging FIG. 4 of the pressing plate 4 .

Furthermore, in FIG. 4 for ease of illustration, the second hexagonal positioning concave hole 6 is drawn by a dotted line. In addition, 7 is a mounting hole drilled on the reference line X-X of the pressing plate 4, and 8 is a positioning hole drilled on the same reference line X-X.

[0011] Then, the sensor box 1 provided with the pressure sensor S is screwed by the pressing plate 4 and fixed on the throttle body 9.

Fig. 5 is a longitudinal sectional view of key parts showing a state in which the sensor box 1 is screwed and fixed to the throttle body. FIG. 6 is a top plan view of FIG. 5 .

The throttle body 9 has an air intake passage 10 penetrated therein, and a butterfly valve 11 for opening and closing the air intake passage 10 is attached to a valve shaft 12 rotatably supported by the throttle body 9 .

In addition, on one side of the throttle body 9, a cylindrical wall portion 1a composed of a large-diameter hole and a small-diameter hole of the sensor box 1 is inserted, and a cylindrical hub portion 9a connected to the large-diameter cylindrical portion and the small-diameter cylindrical portion faces upward. While protruding and forming, the internal thread 9b is opened toward the upper end on the side thereof, and furthermore, the left side of the internal thread 9b protrudes to form a positioning hub 9c.

Also, 13 is a negative pressure introduction hole for a sensor, the lower end of which opens into the intake passage 10a on the downstream side of the regulator valve 11, and the upper end opens toward the upper end 9a1 of the cylindrical hub portion 9a.

Thus, the cylindrical wall portion 1a of the sensor box 1 is inserted and arranged toward the cylindrical hub portion 9a of the throttle body 9, and at this time, the outer circumference of the cylindrical hub portion 9a and the inner circumference 1 of the cylindrical wall portion 1a Compression-set annular O-rings between.

Secondly, since the pressing plate 4 is disposed toward the upper bottom 1b of the sensor box 1 inserted into the throttle body 9, the first hexagonal positioning recess 5 or the second hexagonal positioning recess of the pressing plate 4 6 is snapped and arranged on the positioning protrusion 2 of the sensor box 1, and at the same time, the mounting hole 7 of the pressing plate 4 is arranged adjacent to the internal thread 9b, and the positioning hub 9c is snapped and arranged on the positioning hole 8 of the pressing plate 4.

Then, in this state, the screw 14 is screwed toward the internally threaded hole 9 b through the mounting hole 7 of the pressing plate 4 and fixed.

As described above, since the upper bottom 1b of the sensor box 1 is pressed and held by the pressing plate 4, it is possible to suppress the sensor box 2 from coming out upward, and the rotation of the sensor box 1 is formed by the positioning projections forming a regular hexagon corresponding to it. Any one of the first and second positioning concave holes 5 and 6 is restrained by the buckle configuration. Furthermore, communication between the pressure sensor S arranged in the sensor box 1 and the outside atmosphere is blocked by an O-ring narrowed between the cylindrical wall portion 1a and the cylindrical hub portion 9a. Therefore, through the adjustment valve 12, the negative pressure generated in the suction passage 10a on the downstream side is introduced into the pressure sensor S through the sensor negative pressure introduction hole 13, and the electrical signal corresponding to the negative pressure is passed through the sensor terminal. The portion 3a and the sensor terminal 3 can be output to, for example, an external ECU (not shown in the figure).

[0013] Here, the direction in which the connector 1c protruding sideways from the sensor box 1 is pulled out to the side is, in the state before the pressing plate 4 is screwed by the screw 14 and fixed on the throttle body 9, By rotating the sensor box 1, the apex protruding portion of the positioning protrusion 2 of the sensor box 1 and the apex recesses of the first or second hexagonal positioning recesses 5, 6 of the pressing plate 4 are snapped together at the desired position , the drawing-out direction of the connector 1c to the side is determined by the buckle. In this state, the pressing plate 4 is screwed to the throttle body 9 by the screw 14 and fixed, so that the direction of the connector 1c of the sensor box 1 The direction of side extraction is determined and fixed.

[0014] Then, by using the pressing plate 4 of the present invention, as shown in FIG. The polygonal positioning concave hole 5 and the second hexagonal positioning concave hole 6 can be arranged at 12 angular positions.

That is, as shown in Figure 4, the reference line X-X in the horizontal direction of the pressing plate 4 can be set to 7.5 degrees, 37.5 degrees, 67.5 degrees, 97.5 degrees, 127.5 degrees, 157.5 degrees, 187.5 degrees, 217.5 degrees in the counterclockwise direction. degrees, 247.5 degrees, 277.5 degrees, 307.5 degrees, 337.5 degrees and other 12 angles.

On the other hand, the pressing plate 4 is reversed from the surface configuration state with the reference line X-X as the reference, as shown in Figure 7, the pressing plate 4 is disposed on the throttle valve body 9 as the inner configuration state, and the positioning recess is formed by The first hexagonal positioning recessed hole 5 and the second hexagonal positioning recessed hole 6 are arranged at 12 new angular positions different from the surface arrangement state of the above-mentioned pressing plate.

That is, as shown in FIG. 7 , 22.5 degrees, 52.5 degrees, 82.5 degrees, 112.5 degrees, 142.5 degrees, 172.5 degrees, 202.5 degrees, 232.5 degrees can be set counterclockwise with reference to the horizontal reference line X-X of the pressing plate 4. degrees, 262.5 degrees, 292.5 degrees, 322.5 degrees, 352.5 degrees and other 12 angles.

As described above, the sensor box 1 can be arranged at 24 angular positions with reference to the reference line X-X, and can also be arranged at any angular position at equal intervals of 15 degrees.

Therefore, the drawing-out direction of the connector 1c that is drawn out from the sensor box 1 to the side is drawn in any drawing-out direction at 24 angular positions at equal intervals of 15 degrees, so that the rotation can be greatly improved. The degree of freedom in the direction can also greatly improve the mountability on the vehicle.

In addition, through the first and second hexagonal positioning recesses 5, 6, in each corner recess 5a-5f, 6a-6f, the length L of the buckling part 5g, 6g is the same as that of the existing (Japanese Patent Application No. 2004-270819 ) is not necessary to be shortened, and the same snapping between the apex recesses of the positioning recesses and the apex protrusions of the positioning protrusions as in the past can be maintained, and the rotation of the sensor 1 can be maintained with sufficient snapping force. (the buckle parts 5g, 6g are shown in Fig. 4)

In addition, especially by arranging the positioning hole 8 and the mounting hole 7 on the reference line X-X, when pressing the plate 4 forward and backward on the reference line X-X, the internally threaded hole 9b formed on the throttle valve body 9 is not changed, and the positioning is not changed. The hub 9c is necessary, and the pressing plate 4 can be formed to be thin.

Claims (1)

1. the intake negative-pressure detection device of a throttle valve body in the pressure sensor, from the output signal of pressure transducer, is exported by terminal outstanding in the connector of Sensor box in Sensor box,

The cylinder inner wall portion of described Sensor box, the rotatable insertion freely is disposed at from the outstanding cylinder hub portion of throttle valve body the time, and Sensor box is pushed and is fixed on screw thread and twists the pressing plate below of closing on throttle valve body, it is characterized in that:

Top in Sensor box (1) is provided with the orthohexagonal positioning salient branch (2) that possesses drift angle projection (2a, 2b...),

On the other hand, on pressing plate, drift angle projection (2a with described orthohexagonal positioning salient branch (2), 2b...) phase buckle configuration have a drift angle recess (5a, 5b...) first Hexagon location shrinkage pool (5) and be second Hexagons location shrinkage pool (6) of 30 degree phase places with respect to described first Hexagon location shrinkage pool (5), when being provided with one heart, with respect to reference line, described first Hexagon of 7.5 degree ground formation that tilts is located the summit (5a1) of the first drift angle recess (5a) of shrinkage pool

And then pressing plate (4) is provided with mounting hole (7) and positioning hole (8), and when reversing pressing plate on described reference line, this mounting hole (7) is symmetrical position with respect to reference line all with positioning hole (8).

Images