JPH048834A - Valve device for engine intake controller - Google Patents

Abstract

PURPOSE:To obtain smooth opening and closing motion and a normal opening degree of an opening valve as well as assembling control valve simply to a body by assembling a control valve to an inner body and holding a valve stem between an upstream body and a downstream body in a separated state, and inserting the inner body. CONSTITUTION:A body (throttle body) 1 consists of an upstream body 3 and a downstream body 7 obtained by separating them from each other along a plane passing through the central axis shaftline of the valve stem 23 of a throttle valve 21, and at the right angle to the central axis shaftline. Also, an inner body 11 is designed in a thin cylindrical shape and groove hole 12 to be opened to the upstream end rim, and extending in parallel with the central axis shaftline is formed in opposition by holding the central axis shaftline between its opposed sides, and the downstream end rim of the inner body 11 is inserted into the downstream body 7 by arranging them properly, and the upstream end rim of the inner body 11 is inserted into the upstream body 3. Further, for the throttle valve 21, the valve axis shaftline 23 is established protrusively on both sides confronting on one diameter of a disk shaped valve plate 22. The throttle valve 21 is inserted into the groove hole 12 and fixed to the body 1 as well as the valve plate 22 is installed in an intake passage 2 and the valve axis 23 is supported on bearing holes 5, 9.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a throttle valve provided in an intake pipe line for engine speed control, or a throttle valve provided in an auxiliary passage of an intake manifold for swirl control of an engine combustion chamber. on-off valves, etc.
The present invention relates to a control valve device for controlling engine intake air.

[Conventional technology]

Throttle valves for engine speed control, on-off valves for swirl control, and other valves installed in the engine intake system control the flow rate of engine intake air.

As shown in FIG. 5, the control valve that controls the flow path has a bearing hole n formed opposite to each other in a body 31 constituting a part of the intake system, and a valve shaft inserted through the bearing hole n, so that the central axis of the body 31 is aligned with the center axis of the body 31. Most valves are assembled by fixing a flat valve plate to a valve stem arranged at right angles with a set screw.

That is, insert the valve stem O into the bearing hole 32 from one side, fit the valve plate M into the intake concave of the body 31 from one side, and then insert a set screw and a tightening tool into the intake passage from one side to tighten the valve. Shaft valve plate 3
Fix 4.

Since the assembly is performed in the following order, when fixing the 1-sho plate, the valve stem must be fixed near the fully closed position.Insert the set screw and tightening tool to set the valve plate in a workable position and shape. There is a restriction that the cradle and intake passage 36 must be arranged and formed. When fixing a large number of valve plates by passing one valve stem into a large number of parallel intake passages I, problems such as extremely poor workability cannot be avoided.

On the other hand, when such a control valve is fully open, the valve shaft 33 that crosses the center of the intake passage has a considerable diameter, so it becomes a passage resistance that cannot be ignored, and the intake passage is blocked. There is also the problem of having to make the diameter that much larger.

[Problem to be solved by the invention]

The problems to be solved by the present invention are that assembling the control valve to the body is extremely troublesome and does not have good workability, and that the passage resistance due to the valve stem is large.

In other words, the present invention provides an engine intake control valve device that allows the control valve to be assembled to the fuselage extremely easily, provides smooth opening/closing operation and normal valve opening degree, and furthermore has low passage resistance. The purpose is to provide.

[Means to solve the problem]

The present invention provides a control valve consisting of a valve stem and a valve plate, a body consisting of an upstream body part and a downstream body part which are divided over a plane passing through the axis of the valve stem and are connected to each other, and the divided part. an inner body fitted into the body so as to cover the control valve, the valve stem of the control valve being supported between the upstream body part and the downstream body part at the dividing point, and the valve plate being engaged with the inner body at least during idle. O's means for solving the above problem is that the structure is located inside the fuselage.

Further, in the above means, the control valve is mounted on a valve plate and there is no valve stem, and the valve plate and the valve stems on both sides thereof are integrally molded.

[For production]

The control valve is assembled to the inner body, the valve stem is sandwiched between the separated upstream body and downstream body, and the inner body is fitted, and the two bodies are joined and assembled. The opening/closing operation of the control valve is the same as before, and even if there is a misalignment between the two bodies, the dividing surface will not be covered by the inner body, so there will be no idling failure due to the valve plate getting stuck or an increased gap. .

When there is no valve stem on the valve plate, the passage resistance when fully open is equal to the thickness of the valve plate.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Nine examples of the present invention will be described with reference to the drawings, in which the present invention is applied to a control valve device consisting of a throttle body and a throttle valve installed in an intake system equipped with a low-pressure fuel injection valve to control engine speed.

Figure 1.2.3 shows an embodiment of O.
1 is a body, 11 is an inner body, and 21 is a throttle valve.

The body 1 consists of an upstream body part 3 and a downstream body part 7, which are divided by a plane that passes through the central axis of the valve stem of the throttle valve 21 and is perpendicular to the central axis. .8 and half bearing hole 5. -9, and are airtightly connected by a φ port, nut, and gasket (not shown).

The inner body 11 has a thin cylindrical shape, and has slots 12 that are open at the upstream end and extend parallel to the central axis, and are formed opposite to each other across the central axis. At the same time, the upstream end edge portion is fitted into the upstream body portion 3.

This inner body 11 and the upstream body 3 on the upstream side thereof form an intake passage 2 of uniform diameter, and the bottom of the slot 12 is connected to the downstream body 7.
It coincides with the bearing hole 9 of.

Further, the throttle valve 21 has a valve shaft protruding from both sides facing each other on one diameter of the disc-shaped valve plate η, and the valve plate n
There is no valve stem along.

In addition, such a throttle valve 21 is superior in strength if it is an integrally molded product in which a round rod is forged to form a valve plate n, and valve stems are integrally provided on both sides of the valve plate n. However, the valve plate n and the valve stem n may be made separately and joined by welding. Then, this throttle valve 21tl; is connected to the valve plate n.
The valve stem is disposed in the second intake passage, and the valve stem is supported by being sandwiched between bearing holes 5 and 9, and is attached to the body 1 by being fitted into a slot hole.

The control valve system fl having such a structure is constructed by, for example, first fitting the valve shaft into the slot 12 and assembling the throttle valve 21 to the inner body 11.
Next, with the upstream body 3 and the downstream body 7 separated, the inner body 11 is fitted into the downstream body 7 from the upstream side, the half circumference of the valve shaft n is fitted into the bearing hole 94, and then the upstream body 3 to inner body 11
It is assembled by fitting the remaining half circumference of the valve shaft n into the bearing hole 5 of the downstream body 7, and tightening and connecting the flange 4.8 with bolts and nuts. Alternatively, it can be assembled by fitting the inner body 11 into the downstream body 7 and then assembling the throttle valve 21, and then fitting the upstream body 3 into the inner body 11 and connecting it to the downstream body 7.

The FF3 body 11 has a joint part between the upstream body part 3 and the downstream body part 7, and when the valve plate n opens from the idle position, the part facing the upper fItlI faces each other in the low opening range. It is fitted into the upstream body part 3 as if it were the same.
For this reason.

The difference in the dividing surface caused by the deviation when the upstream body part 3 and the downstream body part 7 are joined, the deviation of the bearing hole 5.9 from the center axis of the intake passage due to machining error, or the difference in bore diameter is caused by the inner body 1.
1, and does not cause idling failure due to gagging of the valve plate n or an increase in the gap. Therefore, the two body parts 3.
It is preferable that the inner peripheral surface into which the inner body 11 is fitted has a slightly larger diameter than the outer diameter of the inner body 11.

Next, FIG. 4 shows an embodiment of the FE
3. The body 16 has a shaft hole 17 formed opposite to each other in the center with the center axis in between, and is divided into two parts 18 along a plane extending through the center of the shaft hole 17 in the direction of the center axis. It is fitted into the large diameter portion 6.10 that sandwich the mating surfaces of the body portion 3 and the downstream body portion 7, forming an air intake passage 2 having a uniform diameter as a whole. The throttle valve 21 has the same configuration as the previous embodiment, with the valve plate n disposed in the intake passage 2 and the valve shaft 3 located in the bearing hole 5.9.
It is supported between the two and is attached to the body 1 by passing through the shaft hole 17.

In the control valve device having such a configuration, the throttle valve 21 is assembled to the inner body 16 by first separating the two pieces 18 and fitting them into the tube shaft hole 17 of the valve stem, and then aligning the pieces 18. The large diameter portion 6 of the upstream body 3 and the downstream body 7. lO inner body 16
from both sides, fit the bearing holes 5 and 9 into the valve shaft, and
It is assembled by joining the lunges 4.8.

′! Ta. In this embodiment as well, the inner body 16 is made to have a length such that the valve plate n is located inside in the low opening range of the throttle valve 21, and the large diameter portion 6. It is made to have an outer diameter slightly smaller than IO.

In these embodiments, the valve shaft is rotated by the driver's accelerator operation or by an actuator, and the valve plate n is rotated from the idle opening position to the fully open position, thereby controlling the amount of intake air flowing through the intake passage 2. .

Incidentally, it is recommended that a half-split metal bearing be installed in advance in the bearing hole 5.9, or that a cylindrical metal bearing be fitted in advance on the valve shaft n. When this is done, one body is divided into an upstream body part and a downstream body part, which has a plurality of parallel intake passages, an inner body fitted into each intake passage to cover the divided part, and a bearing hole. The control valve device is provided with an on-off valve consisting of a plurality of valve plates having supported valve shafts on both sides, and each auxiliary passage of the intake manifold is opened and closed at the same time. Furthermore, the throttle valve 21 can be a normal one in which the valve stem penetrates through the body 1 and is screwed to a valve plate; The use of this has the advantage of reducing passage resistance.

〔Effect of the invention〕

According to the present invention, the body is divided into an upstream body part and a downstream body part, and the pre-manufactured control valves are sandwiched and connected to each other. Even when the control valve is equipped with a plate, it is possible to assemble the control valve to the fuselage extremely easily and quickly without being restricted by the shape of the intake passage.3. In addition, since the inner body is fitted over the dividing point of the two body parts, the valve plate does not get stuck or the gap increases due to misalignment, and the valve plate can be opened and closed smoothly, and a normal degree of closing and opening of the valve can be obtained. Furthermore, when the control valve is configured so that there is no valve stem along the valve plate, the passage resistance when fully open is equal to the thickness of the valve plate, making it possible to make the intake passage smaller in diameter or to improve engine output. becomes possible.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention. Figures 2 and 3 are X-X lines in Figure 1 and 1...
...Body, 2...Intake path, 3...
...Upstream body 5.9...Bearing hole, 7...
...Downstream fuselage IL 11.16...Inner fuselage,
21... Throttle valve, 22... Valve plate, 23
・・・・・・Valve shaft.

Claims (1)

[Scope of Claims] 1. A control valve consisting of a valve stem and a valve plate; a body consisting of an upstream body part and a downstream body part which are divided along a plane passing through the axis of the valve stem and connected to each other; an inner body fitted into the body so as to cover the divided part, the valve shaft of the control valve being supported between the upstream body part and the downstream body part at the divided part, and the valve plate being at least idle. An engine intake control valve device, wherein the engine intake control valve device is sometimes located inside the inner body. 2. Claim 1, wherein the control valve has no valve stem along the valve plate, and the valve plate and the valve stems on both sides thereof are integrally molded.
The engine intake control valve device described.