JP3283618B2 - Aperture device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throttle device for controlling the output of an internal combustion engine, comprising a throttle casing, an operable throttle mechanism, an adjusting drive, and a throttle mechanism stopper coupled to the throttle mechanism. The throttle mechanism is supported in the throttle casing and is adjustable by an adjusting drive, the pivoting movement of the throttle mechanism being limited by an opposing stopper, the opposing stopper being the stop of the throttle mechanism The present invention relates to a type in which the position can be defined, and the diaphragm mechanism occupies the stopper position by contact between the diaphragm mechanism stopper and the opposing stopper.

[0002]

2. Description of the Related Art There is a throttle device having a throttle casing and a throttle mechanism which can be operated by an adjusting drive. In this case, the throttle mechanism is provided with a throttle mechanism stopper, and the throttle casing is provided with a throttle casing stopper. The throttle mechanism stopper contacts the throttle casing stopper,
Thereby, the stopper position of the aperture mechanism is obtained. The stop position defines, for example, the minimum idling operating position of the internal combustion engine. The throttle casing stop has an adjustable adjusting screw. By turning the adjusting screw, the stop position is changed, that is to say via the adjusting screw, for example, the minimum idling operating position of the internal combustion engine is adjusted.

A disadvantage of such known throttle devices is that at least one additional adjusting screw is required, and the adjustment of the throttle mechanism with respect to the adjusting drive when adjusting the stop position, that is, when adjusting the minimum idling operating position. The position will also change disadvantageously. A further disadvantage is that the adjustment of the throttle mechanism relative to the adjusting drive takes place only after the assembly of the adjusting drive in the throttle housing.

[0004]

In order to avoid the above-mentioned disadvantages of the prior art, in the case of the present invention, an opposing stop is connected to the adjusting drive so that the stop position of the throttle mechanism can be changed by adjusting the adjusting drive with respect to the throttle casing. It has become.

[0005]

According to the configuration of the present invention, the relative position of the aperture mechanism with respect to the adjusting drive does not change when adjusting the stopper position. Furthermore, additional adjusting means can be omitted.

In a preferred embodiment of the invention, at least one sensor for detecting the position of the throttle mechanism is connected to the adjusting drive, in which case the sensor signal of the sensor does not change when adjusting the stop position.

In another embodiment of the invention, at least a part of the adjusting drive and the throttle mechanism form a pre-assembled component, the pre-assembled component being adjustable and testable prior to assembly into the aperture casing. is there.

According to the invention, furthermore, if the adjusting drive is provided with a sensor, the pre-assembled component unit includes the adjusting drive, at least a part of the throttle mechanism, and the adjusting device or the inspection device in which the sensor is separate from the throttle casing. It is configured so that it can be adjusted or inspected by the device. Therefore, after the combination of the pre-assembled component unit and the aperture casing, no displacement of the relative position of the aperture mechanism with respect to the adjustment drive, and thus no change in the sensor signal of the sensor when adjusting the stopper position.

An adjusting drive is mounted on the throttle casing by means of fixing screws. If the recess through which the fixing screw penetrates is designed to be somewhat larger in the adjusting direction of the adjusting drive, a particularly simple and low-cost advantageous construction is obtained.

If the spring returning the throttle mechanism is pivotally connected to the adjusting drive, the return force of the spring cannot be changed when adjusting the stopper position. Preferably, the pre-assembled component is adjusted or checked together with the spring.

In contrast to the conventional arrangement in which the stopper position is defined by the plastic deformation of the stopper, the drawing device according to the invention has the further advantage that the adjustment directly defines the stopper position, no special tool is required, Post-adjustment is easily possible if necessary.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The throttle device according to the invention is used in all internal combustion engines, in which the output is controlled by means of a throttle mechanism which can be operated by an adjusting drive. It has become. Throttling devices are used especially in motor vehicles. The aperture mechanism has, for example, an aperture flap or a slider that is supported so as to be pivotable about a rotation axis. With the aid of a throttle flap or slider, the free cross section in the throttle housing can be adjusted for controlling the internal combustion engine, for example, the intake air. The adjusting drive is, for example, an adjusting motor, in particular a stepping motor or a rotary drive. The adjusting drive may be an adjusting device configured in another manner.

FIG. 1 shows the throttle casing 2, the throttle mechanism 4 and the adjusting drive 6 in detail. The aperture mechanism 4 has a shaft 8 and an aperture flap 10 in the embodiment shown. The shaft 8 is mounted in the throttle housing 2 and is rotatable about a rotation axis 12. Aperture flap 1
0 is attached to the shaft 8. By turning the shaft 8 or the throttle flap 10, the air guide 14 extending through the throttle casing 2 is opened more or less.

In the embodiment shown, the adjusting drive 6 is an electric rotary drive. There is no transmission between the adjusting drive 6 and the shaft 8, so that the pivoting movement of the adjusting drive 6 is transmitted to the throttle flap 10 without a gear ratio. In the embodiment shown, the shaft 8 extends through the adjusting drive 6, which serves not only as a throttle flap shaft but also as a rotary shaft for the adjusting drive 6. The shaft 8 may consist of several parts acting on each other.

The adjusting drive 6 is provided with a flange surface 16, and the flange surface is formed on the flange surface 1 of the throttle casing 2.
8 is in contact. The flange surfaces 16 and 18 are the rotation axis 1
2 perpendicular to 2. This is only an example. The flange surfaces 16, 18 may extend coaxially with respect to the axis of rotation 12, for example, in a conical shape.

The adjusting drive 6 is connected to the throttle housing 2 by means of at least one fixing screw 20. The fixing screw 20 is, for example, a commercially available screw, and has a screw head 22.
And a screw shaft 24. The adjusting drive 6 is provided with a notch 26 and a screw 28
Is provided.

The fixing screw 20 extends, for example, parallel to the axis of rotation 12 and extends through the cutout 26 with a screw shaft 24 and is screwed into a screw part 28. Fixing screw 2
The flange surface 16 of the adjusting drive 6
Is pressed against the flange surface 18 of the draw casing 2. A plate 30 is provided below the screw head 22 for good support. Plate 30, screw portion 28 and notch 2
6 are provided in the same number as the fixing screws 20.

In the shaft 8 transversely to the axis of rotation 12 there is, for example, a hole 31 between the diaphragm flap 10 and the adjusting drive 6.
Is provided. A pin 32 extends through the hole 31. Pin 32 projects laterally beyond axis 8.
The aperture mechanism 4 is provided with an aperture mechanism stopper 34. In the illustrated embodiment, the end of the pin 32 forms a throttle mechanism stopper 34.

The adjusting drive 6 includes, for example, the diaphragm flap 1
The adjusting drive stopper 36 is integrally formed with the adjusting drive stopper 36. Depending on the position of the diaphragm mechanism 4, i.e., the position of the shaft 8, the diaphragm mechanism stopper 34 contacts the adjusting drive stopper 36. An adjusting drive stop 36 serves as a corresponding stop for the throttle mechanism stop 34. Further, a spring 40 is provided. The spring 40 is engaged on the one hand with the throttle casing 2 and on the other hand with the pin 32, so as to bring the throttle mechanism stop 34 into contact with the adjusting drive stop 36.

Further, a sensor 42 is provided. The sensor 42, for example configured as a potentiometer, has, for example, one plate 44 on which one or more resistance paths are arranged and one slider arm 46 with one or more sliders. . The resistance path on the plate 44 is connected to an electronic device (not shown) via a cable 48 and possibly a bayonet connection. The slider arm 46 is rigidly connected to the shaft 8 of the throttle mechanism 4.
The plate 44 of the sensor 42 is fixed to the adjusting drive 6 on the side opposite to the throttle casing 2. In response to the pivoting movement of the shaft 8, the slider of the slider arm 46 slides on the resistance path of the plate 44, so that depending on the position of the shaft 8 with respect to the adjusting drive 6, the sensor 42 is connected via the cable 48 to the sensor. Send signal to electronic device. The sensor 42 is protected against external influences by a cover 50.

A turning portion 52 is provided in the squeezing casing 2, and a projection 56 is provided on a side of the adjusting drive device 6 facing the squeezing casing 2. The turning part 52 and the protrusion 56 extend concentrically with respect to the rotation axis 12.
The projection 56 substantially protrudes into the turning part 52 with little play in the assembled state. The pin 32 extends inside the turning part 52. An adjusting drive stop 36 extends into the turning part 52, for example starting from the projection 56.

When the fixing screw 20 is not tightened, the adjusting drive 6 is rotated about the rotation axis 12 with respect to the throttle casing 2. When the adjustment drive 6 rotates with respect to the aperture casing 2, the relative position of the aperture mechanism 4 with respect to the adjustment drive 6 does not change, because the aperture mechanism stopper 34 is held by the adjustment drive stopper 36 by the spring 40. Because. However, the position of the throttle mechanism 4 relative to the throttle casing 2 changes, as does the position of the adjusting drive 6 relative to the throttle casing 2. The relative position of the throttle mechanism 4 with respect to the throttle casing 2 defines a free cross section in the air guide 14. Therefore, the free cross section of the air guide 14 is adjusted by the rotation of the adjusting drive 6. When no current flows through the adjusting drive device 6, the aperture mechanism stopper 34 is in contact with the adjusting drive device stopper 36 or the counter stopper, and the aperture mechanism 4 is at a predetermined stopper position. Such a stop position corresponds to the amount of air to be supplied to the internal combustion engine when the throttle mechanism 4 is in the stop position. This air amount is defined so that the internal combustion engine is operated at idling. The throttle device may be configured such that when the throttle mechanism 4 is at the stopper position, an air amount significantly larger than the air amount required for idling operation flows in the air guide 14. This is important for emergency operation or emergency driving of the motor vehicle in the event of a malfunction of the adjusting drive. This means that, in response to actuation of the throttle mechanism 4 in the closing direction, for example, the position of the minimum cross-section is exceeded, the free cross-section of the air guide 14 is reopened somewhat, and then the throttle mechanism 4 is brought into the stop position. This is achieved by configuring to bring.

The set stopper position is locked by tightening the fixing screw 20.

Energy is supplied to the adjusting drive 6 via the cable 58, and the adjusting drive 6 adjusts the shaft 8 of the throttle mechanism 4 against the force of the spring 40 under control. In adjusting the throttle mechanism 4 against the force of the spring 40, the throttle mechanism stopper 34 separates from the adjustment drive stopper 36. The relative position of the aperture mechanism 4 with respect to the adjustment driving device 6 is detected using the sensor 42. At the time of adjusting the aperture mechanism 4 using the adjustment driving device 6, the sensor signal of the sensor 42 changes. When the fixing screw 20 is loosened and the adjusting drive 6 is turned about the rotation axis 12, that is, when the stopper position for the aperture mechanism 4 is adjusted, the sensor signal of the sensor 42 does not change. That is, each sensor signal of the sensor 42 can be assigned to a respective predetermined throttle flap position, also before the incorporation of the throttle mechanism and the adjusting drive 6 into the throttle casing 2. The sensor signal is independent of the subsequent adjustment of the stop position, which corresponds, for example, to the idling position of the internal combustion engine.

FIG. 2 shows a plan view of the embodiment shown in FIG. The notch 26 is designed as a slot in the embodiment shown in the flange 59 of the adjusting drive 6. The long hole extends in the circumferential direction around the rotation axis 12. Depending on the size of the slot, the entire adjusting drive 6 is pivoted about the axis of rotation 12.

FIG. 3 shows another advantageous embodiment of the throttle device. The illustrated embodiment has substantially the same structure except for the following different points. The individual components of the different embodiments can be combined with one another.

In FIG. 3, one (left-hand) fixing screw 20 shown is screwed into a screw part 28 provided on the adjusting drive 6, and a notch 26 is provided on the throttle casing 2. The further (right-hand) fixing screw 20 in FIG.
And tightening. In this case, a notch 26 is provided in the adjusting drive 6 and the throttle housing 2. FIG.
At least one notch, through which the screw shaft of the fixing screw 20 shown on the right is penetrated, is largely defined so that the adjusting drive 6 can be pivoted in the desired manner with respect to the throttle housing 2.

In the embodiment shown in FIG. 3, one end of the spring 40 is supported not by the throttle casing 2 but by the adjusting drive 6. In both embodiments, the spring 40 acts in a direction to return the throttle mechanism 4.

In the preferred embodiment, the pre-assembled component unit 60 includes the adjusting drive 6, the spring 40 and the sensor 42.
Are formed. Such a pre-assembled component unit 60 is adjusted or inspected before being combined with the draw casing 2. In the pre-assembled assembly unit 60, for example, the adjusting drive 6 or the sensor 42 is tuned to precisely define at which position the shaft 8 will be in the minimum idling position for the internal combustion engine. After the combination of the pre-assembled component unit 60 and the aperture casing 2, the signal of the sensor 40 is not changed when adjusting the aperture mechanism 4 by turning the adjustment drive device 6, and the torque of the spring 40 is not changed. It is.

The adjusting drive 6 comprises, for example, an electric motor acting directly on the shaft 8, in particular a stepper motor. The adjusting drive 6 may include, for example, a transmission in addition to the electric motor.

In the embodiment shown, the shaft 8 has a dual function and is used both as a diaphragm flap shaft for the diaphragm flap 10 and as a rotary shaft for the adjusting drive 6. It is also possible for the throttle flap shaft and the rotary shaft to be formed from two parts and to connect the two shafts only, for example, when the adjusting drive 6 is assembled in the throttle housing 2. In this case, only the rotating shaft is the pre-assembled constituent unit 60.
And the drawing flap shaft is assembled in the drawing casing 2 before the pre-assembly component 60 is assembled.

The spring 40 may comprise a single spring, as shown in the drawing, or may comprise a plurality of springs. 1 if it consists of multiple springs
Simply breaking one spring does not completely extinguish the spring torque.

The stop mechanism stop 34 and / or the adjustment drive stop 36 may be configured, for example, as an elastic stop. Thus, the throttle mechanism 4 can be adjusted in both directions beyond the stopper position based on the turning of the torque of the adjusting drive device 6. Pre-assembly configuration unit 60
May optionally receive the spring 40.

The adjusting drive 6 may be connected to the throttle housing 2 by means of, for example, flanges or rivets, in which case the adjusting drive 6 and the throttle housing 2 are connected.
Only after adjusting the relative position with respect to this, the flange connection or the rivet connection is finally performed.

[Brief description of the drawings]

FIG. 1 is a plan view of a first embodiment of a diaphragm device.

FIG. 2 is a side view of the first embodiment.

FIG. 3 is a plan view of a second embodiment of the diaphragm device.

[Description of Signs] 2 aperture casing, 4 aperture mechanism, 6 adjustment drive, 8 axis, 10 aperture flap,
12 axis of rotation, 14 air guide, 16, 18
Flange surface, 20 fixing screws, 22 screw heads, 24 screw shafts, 26 notches, 2
8 screws, 30 plates, 31 holes, 32
Pin, 34 Throttle mechanism stopper, 36 Adjustment drive stopper, 40 Spring, 42 Sensor, 44 Plate, 46 Slider arm, 4
8 cables, 50 covers, 52 turning parts,
56 Projection

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Rainer Norgauer Stuttgart, Germany 1 Birkenwaldstraße 153 (72) Inventor Werner-Carl Marquardt Marc Greiningen Primerweg, Germany 30 (56) References JP 3-43632 (JP, A) JP-A-3-50344 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F02D 9/00 F02D 11/00

Claims (12)

(57) [Claims] 1. A throttle device for controlling the output of an internal combustion engine, comprising a throttle casing, an operable throttle mechanism, an adjusting drive, and a throttle mechanism stopper coupled to the throttle mechanism. Is supported in the throttle casing and is adjustable by an adjusting drive, such that the pivoting movement of the throttle mechanism is limited by an opposing stopper, which can define the stop position of the restrictor mechanism. In a type in which the diaphragm mechanism occupies the stopper position by contact between the diaphragm mechanism stopper and the opposing stopper, the opposing stopper (36) is connected to the adjustment driving device (6), and the diaphragm mechanism (4 ), The stopper position of which can be changed by adjusting the adjusting drive device (6) with respect to the throttle casing (2). Place. 2. The diaphragm device according to claim 1, wherein at least one sensor (42) for detecting the position of the diaphragm mechanism (4) is connected to the adjusting drive. 3. An adjusting drive (6) and a sensor (42).
3. An aperture device according to claim 2, wherein the first and second components form an adjustable pre-assembled component unit. 4. A spring (40) for engaging a throttle mechanism (4).
4. A throttle device according to claim 1, wherein the spring acts to bring the throttle mechanism (4) to a stop position. 5. The throttle device according to claim 4, wherein the spring (40) is engaged with the adjusting drive (6). 6. An adjusting drive (6), a sensor (42),
6. A throttle device according to claim 2, wherein the spring and the spring form an adjustable pre-assembled component unit. 7. An aperture mechanism (4) having a shaft (8) pivotally supported about a rotation axis (12),
The adjusting drive (6) is embodied as a rotary drive and is connected to the throttle housing (2), the adjustment of the stop position being effected by the pivoting movement of the adjusting drive (6) about the rotation axis (12). An aperture device according to any one of claims 1 to 6, wherein the aperture device is used. 8. The adjusting drive (6) is connected to the throttle housing (2) by means of at least one fixing screw (20), the fixing screw (20) controlling the pivoting movement of the adjusting drive (6). 8. The throttle device according to claim 7, wherein the expansion device extends through the notch (26) that allows the opening. 9. The throttle device according to claim 8, wherein the notch is an elongated hole extending substantially in the turning direction of the adjusting drive. 10. The stop position is used to determine the amount of air to be supplied to the internal combustion engine, the amount of air corresponding to the amount of air required especially for idling or emergency operation of the internal combustion engine. A diaphragm device according to any one of claims 1 to 9. 11. The drawing device according to claim 1, wherein the drawing mechanism stopper (34) and the opposing stopper (36) are arranged in the turning part (52). 12. The squeezing device according to claim 4, wherein the squeezing mechanism stopper (34), the opposed stopper (36) and the spring (40) are arranged in the turning part (52).