JPH0127251B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an adjustment device for controlling the flow cross-section in a conduit leading to the operating medium of an internal combustion engine, which comprises an electromagnetic actuating member and a throttle mechanism adjustable by this actuating member. Concerning the type of thing that is being done. Adjustment devices of this type are described, for example, in French patent no.
466,959, this known adjusting device is very expensive in construction and has considerably large dimensions.

On the other hand, a regulating device having the features set forth in claim 1 can be constructed compactly and can be directly connected to the conduit leading the operating medium without using an intermediate piece or the like. Moreover, there is no need to change the direction of the conduit. The electromagnetic actuating element of the adjusting device is housed in a protected manner and is forcedly cooled by the flowing medium. Furthermore, the contour of the adjusting device can be smooth and the adjusting device can be suspended moment-free.

Advantageous embodiments of the invention are described in the following claims.

In the following, the configuration of the present invention will be specifically explained based on the embodiments shown in the drawings.

An important means of minimizing the content of harmful substances in the exhaust gas of internal combustion engines and reducing fuel consumption, taking into account the wear and tear over the entire service life of the motor vehicle, is to control the idling speed.
For this purpose, a regulating device is required, which controls the part of the operating mixture that is combusted in the combustion chamber of the internal combustion engine, and in this case controls the operating medium, for example as additional air.

The adjusting device shown in FIG.
, one end 2 of which transitions into a first connecting tube piece 4 and the other end 3 transitioning into a second connecting tube piece 5 . Both connecting pieces and the tubular casing have a common longitudinal axis;
The two connecting pieces serve to connect the regulating device to a conduit for conducting additional air or idling mixture, not shown.

A cylindrical casing 7 of an adjusting electromagnet (operating member) 6 is placed inside the tubular casing, and the adjusting electromagnet 6 has a magnet coil 8 as is well known.
and a movable element 1 guided by pins 9 and 10 coaxially penetrating both ends of the casing 7.
1. In this case, the adjusting electromagnet is located coaxially with respect to the axis of the tubular casing 1 and has one end 14 connected to the tubular casing 1.
It is supported by a rod-shaped manually operated pin 15 which projects from the other end 3 into the casing interior, by means of which the adjusting electromagnet is centered.
The other end 16 of the cylindrical casing of the regulating electromagnet
are brought into intimate contact with a tubular member 17 having approximately the same diameter, which is coaxially connected to the cylindrical casing 7 and whose other end is connected to the tubular casing 1. It is tightly supported on one end 2.

Therefore, inside the tubular casing 1, the tubular member 17 and the cylindrical casing 7 form an annular chamber 19, which is always connected to the second connecting piece 5 via the gap between the pins 15. There is.

Inside the tubular member 17 a cot-shaped slider (throttle mechanism) 21 is arranged, which has its bottom 22 directed towards the end 16 of the cylindrical casing 7 and which extends in the inner bore of the tubular member 17. Closely movable. To balance the pressure, the bottom 22
A hole 23 is formed in the hole 23 . Inside the tip-shaped slider 21, a push spring (return spring)
25 is a first spring receiver 26 and a second spring receiver 27
It acts to press the tip-shaped slider 21 against the pin (adjustment mechanism) 9 protruding from the end 16 of the cylindrical casing 7. The first spring receiver 26 has a protrusion 2 in the center.
8, which is configured in a spherical shape,
It engages in a spherical cavity formed on the inner surface of the bottom portion 22 of the cup-shaped slider 21. This spherical cavity is formed in the blind hole 29, for example.

The second spring receiver 27 rests on the spherical end 30 of a pin 31 which is screwed coaxially into the end 2 of the housing 1 from the side of the connecting tube 4 . In this case, the spherical end 30 engages in a spherical cavity formed in the center of the second spring seat 27. This spherical cavity can be formed, for example, in a hole, so that the spring bearing 27 is centered with respect to the axis of the tubular housing 1.
The first spring receiver 26 is also centered by the projection 28 and the blind hole 29.

The tubular member 17 has a through hole 33 which connects the interior of the tubular member 17 to the annular chamber 19 and which is completely closed when the cup-shaped slider 21 is in one end position. open and fully closed when the slider 21 is in the other end position. The interior of the tubular member 17 is always connected to the connecting tube piece 4 by a through hole 34 formed in the end 2 of the tubular casing 1 .

FIG. 2 shows a cross section taken along the line --- in FIG. As can be seen, three through holes 33 are provided at equal intervals along the circumference, so that
The operating medium flows uniformly in the annular chamber 19. Furthermore, no resultant radial force acts on the tip-shaped slider. The through hole 33 preferably has a rectangular shape. Through-hole 3 is controlled by a regulating electromagnet.
The free cross section (flow cross section) of 3 is continuously adjusted by means of a tip-shaped slide 21. Slider 2
1 is the collar 35 of the tubular member 17 in the closed position.
Even if the play between the slider and the tubular member increases due to wear,
The annular chamber 19 and the connecting tube piece 4 are completely separated. Pivotable spring receivers 26 and 2
By arranging the push spring 25 between the slider and the tubular member 7, it is possible to prevent lateral forces and even tilting moments from acting on the tip-shaped slider, thereby ensuring that the slider and the tubular member do not fit tightly together. Even if they fit together, friction can be reduced,
Slider jamming is avoided. The hysteresis of a regulating device constructed in this way is extremely low.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of one embodiment of the present invention, and FIG.
The figure is a cross-sectional view taken along line - in FIG. 1. 1... Casing, 2 and 3... End, 4 and 5... Connection tube piece, 6... Adjusting electromagnet, 7... Casing, 8... Magnet coil, 9 and 10... Pin, 11... Movable child, 14... end, 15... pin, 16... end, 17... tubular member, 19...
Annular chamber, 21...Slider, 22...Bottom, 23
... hole, 25 ... push spring, 26 and 27 ... spring receiver, 28 ... projection, 29 ... blind hole, 30 ...
End portion, 31...pin, 33 and 34...through hole, 3
5...Brim.

Claims (1)

[Scope of Claims] 1. A regulating device for controlling the flow cross-section in a conduit leading to the operating medium of an internal combustion engine, comprising an electromagnetic operating member and a throttle mechanism adjustable by this operating member. In the device, an operating member and a throttle mechanism are arranged coaxially in front and behind each other in a tubular casing 1, and an annular chamber 19 is formed between the inner wall surface of the casing and one side of the casing. The end 2 of the annular casing transitions into a connecting tube piece 4, which can be connected to the annular chamber 19 via a throttle mechanism, and the other end 3 of the annular casing transitions into the annular chamber 19. A regulating device for controlling the flow cross-section, characterized in that the connecting tube piece 5 is always connected to the flow cross section 19, and that both connecting tube pieces 4, 5 can be connected to a conduit carrying the operating medium. 2 The tubular member 17 is attached to the casing 7 of the electromagnetic operating member.
The tubular member and the operating member are arranged coaxially with respect to the tubular casing 1 and form an annular chamber 19 between the tubular casing 1 and the operating member. One end of the member is tightly coupled with the casing 7 of the operating member, and the other end of the tubular member is tightly coupled with the tubular casing, and the tubular member 1
2. Adjusting device according to claim 1, in which a cylindrical slider 21 is tightly inserted, which is adjustable by said operating member. 3. The slider 21 is movable in the axial direction by the operating member against the force of the return spring, and cooperates with a through hole 33 formed in the tubular member 17, whereby the through hole 33 The annular chamber 19 is the tubular member 1
The through hole 34 of the tubular casing 1 and the end 2 of the tubular member 17 is connectable to the inside of the tubular casing 1 and the tubular member 17.
3. Adjusting device according to claim 2, which can be connected to a connecting tube 5 adjoining this end via . 4. The slider 21 is configured in a tip shape,
The adjusting mechanism of the operating member is engaged with the outer bottom surface of the slider, and a first spring receiver 26 is engaged with the inner bottom surface of the slider, and the slider is supported by the spring receiver and the end wall of the tubular casing. 4. The adjusting device according to claim 3, wherein a return spring is arranged between the second spring receiver 27 and the second spring receiver 27, and at least one of the spring receivers is pivotably supported. 5 Adjustment pin 31 at end 2 of tubular casing 1
is coaxially screwed in from the outside, and this adjusting pin has a spherical end 30 which engages in a spherical cavity of the second spring receiver 27. A regulating device according to range 4. 6 The first spring receiver 26 has a central projection 28 with a spherical end, the end of which is
6. The adjustment device according to claim 5, which engages in a spherical cavity formed in the bottom inner surface of the cup-shaped slider. 7. A patent claim in which, when the tip-shaped slider 21 is in the closed position and the through hole 33 is closed, the end face of the slider is abutted against the collar 35 forming the sealing surface of the tubular member 17. The adjusting device according to item 4.