JPH0874606A - Throttle body structure - Google Patents

Abstract

PURPOSE: To enable mounting a common throttle body irrespective of by providing a related mechanism on a throttle body so as to position in a substantially triangular space surrounded by first, second and third planes. CONSTITUTION: A first plane P1 parallel to a circulation direction axis C of a body intake passage 4 is sampled in a vicinity of an outer edge of one side B1 of the body intake passage 4 at its diameter direction in a throttle body 2. Second and third planes P2, P3 which are crossed each other in the vicinity of an outer edge of the diametral other end B2, and cross the first plane P1 in the vicinity of the outer edge of the end B1 in the diameter direction are sampled. A substantially triangular space D longitudinally extended on the circulation direction axis C is sampled. A first idle mechanism 10, a throttle position sensor 12, and an air flow sensor 14 and a breezer connection pipe 16 are installed so as to position inside the triangular space D surrounded the first, second third planes P1, P2, P3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throttle body structure, and in particular, it is not necessary to design a throttle body for each engine type, the throttle body can be shared, and the die cost and the number of parts can be reduced. The present invention relates to a throttle body structure capable of achieving cost reduction as well as reduction of management man-hours and development man-hours.

[0002]

2. Description of the Related Art An engine has a V
There are types such as type and series type. Further, the engine is provided with a throttle body in the intake system, and a throttle valve for adjusting the amount of air is provided in the body intake passage of the throttle body.

Since the layout of the intake system of the engine differs for each engine type, the shape of the throttle body is determined so as to match each engine type. Therefore, the throttle body differs depending on the engine type.

[0004]

However, different throttle bodies for different engine types require various types of throttle body designs, which results in an increase in die cost and the number of parts. There is an inconvenience that the management man-hours and the development man-hours increase, and the cost increases.

[0005]

Therefore, in order to eliminate the above-mentioned inconvenience, the present invention relates to a throttle body that is parallel to the flow axis of the body intake passage near the outer edge of the body intake passage on one side in the radial direction. One plane is drawn so as to intersect with each other in the vicinity of the outer edge on the other side in the radial direction of the body intake passage of the throttle body and to intersect with the first plane in the vicinity of the outer edge on the one radial side of the body intake passage of the throttle body. It is characterized in that the second and third planes are drawn, and a related mechanism is attached to the throttle body so as to be positioned in a substantially triangular prism space surrounded by the first and second and third planes. .

[0006]

According to the structure of the present invention, the throttle body is positioned in a substantially triangular prism space surrounded by the first plane and the second and third planes which are drawn near the outer edges of the body intake passage on the respective radial directions. By installing the related mechanism as described above, it is formed into a substantially triangular prism shape as a whole, so that it can be mounted with the posture changed according to the layout of the intake system of each type of engine. However, a common throttle body can be installed.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 7 show an embodiment of the present invention. 1 and 2, 2 is a throttle body, 4 is a body intake passage, and 6 is a throttle valve. The throttle body 2 is formed in a substantially cylindrical shape, and a throttle valve 6 is provided in the body intake passage 4.
The throttle valve 6 is rotated by the valve shaft 8 to open / close the body intake passage 4 and adjust the air amount.

The throttle body 2 includes a fast idle mechanism 10 as a related device related to the intake system.
A throttle position sensor 12, an air flow sensor 14, and a breather connection pipe 16 of a breather mechanism (not shown) are attached.

The first idle mechanism 10 causes the plunger 20 to move forward and backward by a thermo wax (not shown) which expands and contracts according to the temperature contained in the wax portion 18, and the plunger 20 causes the first idle arm 22 to intervene. First idle shaft 24
Is rotated to open the throttle valve 6 slightly when the engine is cold.

The throttle position sensor 12 is
The opening / closing state such as the opening position and opening / closing speed of the throttle valve 6 is detected and output to a control unit (not shown). Note that reference numeral 2
Reference numeral 6 is a coupler for connecting a harness that outputs the throttle position sensor 12 signal to the control unit.

The air flow sensor 14 detects the amount of air in the body intake passage 4 and outputs it to a controller (not shown). Reference numeral 28 is a coupler for connecting a harness that outputs a signal from the airflow sensor 14 to the control unit.

The breather connecting pipe 16 of the breather mechanism (not shown) is connected to the cylinder head by a breather hose, which will be described later, and guides blow-by gas to the body intake passage 4.

In the vicinity of the outer edge of the throttle body 2,
First to third planes P1 to P3 are drawn. First plane P1
Is parallel to the flow direction axis C of the body intake passage 4 in the vicinity of the outer edge of one side B1 (upper side in FIG. 1) in the radial direction orthogonal to the axis A of the valve shaft 8 of the body intake passage 4 of the throttle body 2. Is depicted in. The second and third planes P2 and P3 intersect with each other in the vicinity of the outer edge of the other side B2 (the lower side in FIG. 1) in the radial direction orthogonal to the axis A of the valve shaft 8 of the body intake passage 4 of the throttle body 2. , Is drawn so as to intersect with the first plane P1 in the vicinity of the outer edge of one side B1 in the radial direction orthogonal to the axis A of the valve shaft 8 of the body intake passage 4.

As a result, a first plane P1 parallel to the flow direction axis C of the body intake passage 4 is drawn on the throttle body 2 in the vicinity of the outer edge of the one side B1 in the radial direction of the body intake passage 4, 4 cross each other in the vicinity of the outer edge of the other side B2 in the radial direction of the body 4 and in the vicinity of the outer edge of the one side B1 in the radial direction of the body intake passage 4 in the first plane P.
Draw the second and third planes P2 and P3 that intersect 1 respectively,
A substantially triangular prismatic space D extending in the longitudinal direction of the flow-direction axis C of the body intake passage 4 of the throttle body 2 is depicted.

In the throttle body 2, the first idle mechanism 10 which is the related mechanism and the throttle position are arranged so as to be positioned in a substantially triangular prism space D surrounded by the first plane P1 and the second and third planes P2 and P3. Sensor 1
2, air flow sensor 14, breather mechanism (not shown)
Install the breather connection pipe 16 of.

The first idle mechanism 10 is located in the substantially triangular prism space D at one side B1 (upper side in FIG. 1) in the radial direction orthogonal to the axis A of the valve shaft 8 of the body intake passage 4. It is attached to the outer edge of the throttle body 2 on one side of the valve shaft 8 in the direction of the axis A (left side in FIG. 1) and on one side of the axis C of the body intake passage 4 in the flow direction C (upper side in FIG. 2).

The throttle position sensor 12 is
The other side of the valve shaft 8 in the direction of the axis A (the right side in FIG. 1) and the one side of the flow direction axis C of the body intake passage 4 (the upper side in FIG. 2) so as to be located in the substantially triangular prism space D, It is attached to the outer edge of the throttle body 2.

The air flow sensor 14 is positioned in the substantially triangular prism space D so as to be located on the other side of the valve shaft 8 in the direction of the axis A (on the right side in FIG. 1) and on the flow direction axis C of the body intake passage 4. It is attached to the outer edge of the throttle body 2 near the other side (near the lower side in FIG. 2).

The breather connection pipe 16 is positioned in the substantially triangular prism space D, and the other side B2 in the radial direction orthogonal to the axis A of the valve shaft 8 of the body intake passage 4.
It is attached to the outer edge of the throttle body 2 (on the lower side in FIG. 1) and at a substantially central portion of the flow direction axis C of the body intake passage 4.

As described above, the throttle body 2 is a substantially triangular prism surrounded by the first plane P1 and the second and third planes P2 and P3, which are depicted in the vicinity of the outer edges of the radial sides B1 and B2 of the body intake passage 4. The first idle mechanism 10, the throttle position sensor 12, the air flow sensor 14, and the breather connection pipe 16 which are related mechanisms are attached and provided so as to be positioned in the space D, so that they are formed in a substantially triangular prism shape as a whole. become.

As a result, the throttle body 2 can be mounted by changing its posture according to the layout of the intake system of each type of engine as follows, and is mounted as a common throttle body 2 regardless of the engine type. can do.

First, mounting on an in-line engine will be described with reference to FIGS.

In the figure, 102 is an in-line engine, 1
04 is a cylinder block, 106 is a cylinder head, 1
Reference numeral 08 is a head cover, 110 is a crank shaft, 112 is a bearing cap, and 114 is an oil pan.

In this in-line engine 102, an intake manifold 116 is arranged on one side (left side in FIG. 3) in the width direction of the cylinder head 106. Intake manifold 11
Each branch pipe 118 of 6 has one end side of the cylinder head 106.
And the other end of the surge tank 120 below.

The surge tank 120 is disposed above the intake manifold 116 and on one side in the width direction of the cylinder head 106 (left side in FIG. 3), and the in-line engine 1
02 is formed in a tubular shape extending in the longitudinal direction.

At one end of the surge tank 120 in the longitudinal direction (right end in FIG. 4), the throttle body 2 is provided.
Has been contacted. As shown in FIG. 3, the throttle body 2 is a space portion 1 above the intake manifold 116 and on one side (left side in FIG. 3) in the width direction of the cylinder head 106.
12, the flow direction axis C of the body intake passage 4 is oriented in the longitudinal direction of the in-line engine 102, the first plane P1 is oriented downward, and the second and third planes P2 and P3 are arranged. The surge tank 120 is connected to one end of the surge tank 120 in the longitudinal direction in a posture in which it is tilted upward.
The throttle body 2 is connected to the air cleaner by an intake duct (not shown).

As a result, the throttle body 2 is arranged such that the fast idle mechanism 10 is on the lower side and the breather connection pipe 16 is on the upper side.
It will be installed in 02. The throttle body 2 mounted in such a posture has the branch pipes 11 of the intake manifold 116.
8 is connected below the surge tank 120,
The lower first idle mechanism 10 does not interfere with each branch pipe 118.

Further, as shown in FIG. 3, the throttle body 2 is arranged on one side in the width direction of the cylinder head 106 (on the left side in FIG. 3), so that the head cover 10 is provided.
The height of the in-line engine 102 can be suppressed, and the breather connecting pipe 16 is mounted in the posture in which the breather connecting pipe 16 is on the upper side. The breather connecting pipe 122 of the head cover 108 can be easily connected by the breather hose 124.

Thus, the throttle body 2 is
The in-line engine 102 can be mounted by changing its posture in accordance with the layout of the intake system, the total height of the in-line engine 102 can be suppressed, and the breather connection pipe 16 of the throttle body 2 and the head cover 108. The breather connecting pipe 122 can be easily connected with the breather hose 124.

Next, the mounting on the V-type engine is shown in FIGS.
Follow the instructions below.

In the figure, 202 is a V-type engine, and 20
4 is a cylinder block, 206A and 206B are cylinder heads on each side, 208A and 208B are head covers on each side,
210 is a space between banks, 212 is a crankshaft, 214
Is a bearing cap and 216 is an oil pan.

The V-type engine 202 includes a branch pipe 2 on each side of the intake manifolds 218A, 218B on the side of the space 210 between the banks of the cylinder heads 206A, 206B on each side.
20A / 220B is connected to one end side, and the other end of each side branch pipe 220A / 220B is connected to each side surge tank 222A / 222B arranged above the opposite side head cover 208A / 208B. ing.

That is, the one-side intake manifold 218A is
One end side of the one-side branch pipe 220A is connected to the inter-bank space portion 210 side of the one-side cylinder head 206A, and the other end side of the one-side branch pipe 220A is arranged above the other-side head cover 208B on the opposite side. One side surge tank 22
I'm contacting 2A.

The other side intake manifold 218B connects one end side of the other side branch pipe 220B to the inter-bank space 210 side of the other side cylinder head 206B and the other end side of the other side branch pipe 220B is opposite. Side surge tank 222 disposed above one side head cover 208A
I have contacted B.

The surge tanks 222A and 222B on each side are
It is arranged above the head covers 208A and 208B on each side, and is formed in a tubular shape extending in the longitudinal direction of the V-type engine 202 (vertical direction in FIG. 6).

One end of each side distribution pipe 224A, 224B is connected to one longitudinal end (upper end in FIG. 6) of each side surge tank 222A, 222B. The other end of each of the side distribution pipes 224A and 224B is collected in a collecting pipe 226. The collecting pipe 226 is the V-type engine 202.
The opening is provided so as to be directed to the other end side (lower end side in FIG. 6) in the longitudinal direction.

The throttle body 2 is connected to the collecting pipe 226. The throttle body 2 is shown in FIG.
As shown in FIG. 5, the inter-manifold space 2 above the intake manifolds 218A and 218B on each side, which are arranged to intersect with each other,
28, is oriented in the longitudinal direction of the V-type engine 202 along the flow-direction axis C of the body intake passage 4, and
The plane P1 is directed upward and the second and third planes P
The 2 · P3 is connected to the collecting pipe 226 in such a posture that the 2 · P3 is tilted downward. The throttle body 2
Are connected to the air cleaner by an intake duct (not shown).

As a result, the throttle body 2 has the V-type engine 20 in a posture in which the fast idle mechanism 10 is on the upper side and the breather connection pipe 16 is on the lower side.
Mounted on 2. With the throttle body 2 mounted in such a posture, the breather connecting pipe 16 is provided in the lower triangular inter-manifold space portion 228 above the intake manifolds 218A and 218B, which are arranged so as to intersect with each other, with the breather connection pipe 16 below. The intake manifold 218 on each side
It does not interfere with the distribution pipes 224A and 224B on each side of the A / 218B.

The throttle body 2 is shown in FIG. 7 (A).
As shown in FIG. 7, the breather connecting pipe 16 is mounted downward in the space 228 between the intake manifolds 218A and 218B which are arranged so as to cross each other in an inverted triangular shape, so that the head cover 208A on each side is mounted.・
It is only slightly protruded from 208B, and FIG.
As shown in (B), each side intake manifold 218A ・ 21
8B upper inverted inter-manifold space 228
In comparison with the case where the breather connection pipe 16 is mounted on the upper side, the total height of the V-type engine 202 can be suppressed by the height H.

Further, the throttle body 2 is mounted with the breather connecting pipe 16 facing downward so that the breather connecting pipe 16 of the throttle body 2 and the breather connecting pipe 230 of the one-side head cover 208A are located close to each other. Therefore, the breather hose 232 can be easily connected.

Thus, the throttle body 2 is
The V-type engine 202 can be mounted by changing its posture according to the layout of the intake system, and can suppress the overall height of the V-type engine 202, and can be connected to the breather connection pipe 16 of the throttle body 2 and one side. The breather connecting pipe 230 of the head cover 108A can be easily connected by the breather hose 232.

As a result, the throttle body 2 can be mounted by changing its posture according to the layout of the intake system of the engine 102/202 of each type, and the common throttle body 2 is mounted regardless of the engine type. be able to.

Therefore, the throttle body 2 does not need to be designed for each engine type, the throttle body 2 can be used in common, the die cost and the number of parts can be reduced, and the man-hours required for management can be reduced. The development man-hours can be reduced, and the cost can be reduced.

[0045]

As described above, according to the present invention, the throttle body has a substantially triangular prism space surrounded by the first plane and the second and third planes which are depicted in the vicinity of the outer edge of each side of the body intake passage in the radial direction. By installing the related mechanism so that it is located inside, it is formed into a substantially triangular prism shape as a whole, so it is possible to mount it by changing the posture according to the layout of the intake system of each type of engine. A common throttle body can be installed regardless of engine type.

Therefore, it is not necessary to design the throttle body for each engine type,
The throttle body can be standardized, the die cost and the number of parts can be reduced, the management man-hours and the development man-hours can be reduced, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of a throttle body showing an embodiment of the present invention.

FIG. 2 is a plan view of a throttle body.

FIG. 3 is a front view of an in-line engine equipped with a throttle body.

FIG. 4 is a side view of an in-line engine equipped with a throttle body.

FIG. 5 is a front view of a V-type engine equipped with a throttle body.

FIG. 6 is a plan view of a V-type engine equipped with a throttle body.

FIG. 7A is a front view of a V-type engine equipped with a throttle body in a posture in which a breather connection pipe is arranged on a lower side. (B) is a front view of a V-type engine equipped with a throttle body in a posture in which a breather connection pipe is disposed on an upper side.

[Explanation of symbols]

 2 Throttle body 4 Body intake passage 6 Throttle valve 8 Valve shaft 10 Fast idle mechanism 12 Throttle position sensor 14 Air flow sensor 16 Breather connection pipe 102 In-line engine 116 Intake manifold 118 Branch pipe 120 Surge tank 122 Breather communication pipe 124 Breather hose 202 V Type engine 218A / 218B Each side intake manifold 220A / 220B Each side branch pipe 222A / 222B Each side surge tank 224A / 224B Each side distribution pipe 226 Collecting pipe 228 Manifold space 230 Breather communication pipe 232 Breather hose

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[Procedure amendment]

[Submission date] November 8, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

FIG.

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

Claims (1)

[Claims] 1. A first plane parallel to the flow direction axis of the body intake passage is drawn in the vicinity of an outer edge of the throttle body on one side in the radial direction of the body intake passage, and the other side in the radial direction of the body intake passage of the throttle body is drawn. 2nd and 3rd planes that intersect with each other in the vicinity of the outer edge of the throttle body and in the vicinity of the outer edge of the throttle body on one side in the radial direction of the body air intake passage, respectively, and draw the first and second planes. A throttle body structure characterized in that a related mechanism is attached to the throttle body so as to be located in a substantially triangular prism space surrounded by a third plane.