JPS60216036A - Throttle-valve apparatus for engine - Google Patents

Abstract

PURPOSE:To improve response performance and secure the safety on trouble of a control system by dividing a suction throttle-valve into a valve part connected to an operation element and a valve part connected to a pulse motor and connecting the both valve parts through a clutch which can be connected and cut-off. CONSTITUTION:A throttle valve 2 installed into a suction passage 1 is divided into two parts, and the first valve part 3 is connected to an accelerating pedal 8, and the second valve part 4 is connected to a pulse motor 17, and the first and the second valve parts 3 and 4 are connected through a clutch 15. When a CPU operates, an operating device 20 is excited to pull a supporting board 16, and the second valve shaft 6 is retreated, and the clutch 15 is set into cut-off state, and the second valve poart 4 is automatically opened and closed. When an anomaly is generated in the CPU, the CPU stops operation, and the return spring 21 of the operation device 20 pushes the supporting board 6 to connect the clutch 15, and the both valve parts 3 and 4 can be opened and closed at a same time by the accelerating pedal.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a throttle valve device including a throttle valve provided in an engine intake passage to open and close the intake passage.

Conventionally, the opening degree of the throttle valve installed in the intake passage of an engine is determined only by the operator's operation of the throttle valve. There was a tendency for the throttle valve to open excessively due to excessive operation, consuming an excessive amount of fuel.

Therefore, the present invention corresponds to the operator's throttle valve operation, and can always obtain an appropriate throttle valve opening according to surrounding conditions such as engine status and vehicle speed, and can reduce the fuel consumption of the engine without requiring any skill. It is an object of the present invention to provide the above-mentioned throttle valve device capable of suppressing the amount of water to the necessary minimum limit.

To achieve this object, the present invention provides a throttle valve provided in the intake passage of an engine to open and close it, a first valve part connected to a throttle valve operator, and a second valve part connected to a Noculus motor. between the first and second valve parts.
The valve is characterized by being equipped with a clutch that can be switched between a connected state in which the valve parts can be opened and closed in the same phase and a closed state in which each valve part can be opened and closed independently.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a butterfly-type throttle valve 2 is rotatably supported in an intake passage 1 of an engine, and the opening degree of the throttle valve 2 is adjusted according to the opening degree of the throttle valve 2. Then, air filtered by an air cleaner (not shown) flows down the intake passage 1 and is supplied to the combustion chamber of the engine together with an amount of fuel commensurate with the air flow rate.

The throttle valve 2 is divided into a first valve part 3 and a second valve part 4 on a plane perpendicular to its rotation axis.

In this case, it is desirable for the control to make the coverage area B of the second valve part B larger than the coverage area A of the first valve part 3 in the intake passage 1, and in particular, A'', B=1:9~ It is desirable to set it to 3 near.

Bosses 3a and 4α are integrally formed in the first and second valve parts 3 and 4 along their rotation axes, respectively, and a first valve shaft 5 is fixed to the boss 3σ of the first valve part 3. penetrates one side wall of the intake passage 1 and protrudes to the outside, and the protruding end is (-1
is fixed. An accelerator pedal as a throttle valve operator is connected to this lever 7 via an interlocking mechanism 9, and the first valve portion 3 can be opened in response to depression of the accelerator pedal 8. A valve closing spring 10 that biases the first valve portion 3 in the closing direction is connected thereto.

1 and 2, a second valve shaft 6 that passes through the other side wall of the intake passage 1 is slidably fitted into the boss 4a of the second valve portion 4. In order to connect the two valve shafts 4α and 6 so that they can rotate together while regulating the sliding stroke, a pin 11 and an elongated hole are provided in the second valve shaft 6 and the boss 4α to slidably engage with each other. 12 are provided respectively.

A wedge-shaped clutch body 13 is integrally formed on the inner end of the second valve shaft 6, and a wedge-shaped clutch hole 14 corresponding to the clutch body 13 is formed on the inner end surface of the boss 3α of the first valve portion 3.
The clutch body 13 and the clutch hole 14 constitute a clutch 15.

Therefore, in the state of the clutch 15, that is, the state in which the clutch body 13 is engaged with the clutch hole 14, the first and second valve portions 3
, 4 are automatically connected in the same phase, and when the clutch 15 is in the disengaged state, that is, the clutch body 13 is disengaged from the clutch hole 14, each valve portion 3 is connected in the same phase.

4 is allowed to open and close independently. At that time, the engagement and disengagement stroke of the clutch body 13 with respect to the clutch hole 14 is the second
The pin 11 of the valve stem 6 is regulated by coming into contact with both end walls of the elongated hole 12 of the boss 4a.

A rotating shaft 17α of a pulse motor 17 installed on a support base 16 is connected to the outer end of the second valve shaft 6 via a coupling 18. The support stand 16 is slidably supported on a fixed guide rail 19 parallel to the second valve shaft 6 and connected to an actuator 20 that can shift it along the guide rail 19.

The actuator 20 is configured to be electromagnetic, for example, and when it is energized, it pulls the support base 16 to disconnect the clutch 15, and when it is demagnetized, it pushes the support base 16 under the action of the return spring 21 and closes the clutch. 15 in a connected state.

In order to prevent air from passing between the divided end faces of both valve parts 3 and 4, even when the valve parts 3 and 4 open and close independently and are out of phase with each other, both valve parts A partition means 22 is provided between 3 and 4.

In the example shown in FIGS. 1 to 3, the partition means 22 consists of two arc-shaped partition plates 23.2 that partially overlap each other.
4, these are configured to close the space between the divided end faces of both valve parts 3 and 4 when the first valve part 3 performs a valve opening operation (movement in the direction of arrow α) before the second valve part 4. , and are connected to the divided end faces.

The partition means 22 shown in FIG. 4 is composed of two pairs of arc-shaped partition plates 23, 23; The other pair of partition plates 24.24 are connected to the boss 4α on the divided end face of the second valve portion 4 in a point-symmetrical manner with respect to the boss 3α.
They are arranged point-symmetrically with respect to each other. According to this example, the first
And no matter which of the second valve parts 3 and 4 performs the valve opening operation first,
In other words, no matter how out of phase the valve parts 3 and 49 are, the space between the divided end faces can be closed.

Further, the partitioning means 22 shown in FIGS. 5 and 6 is composed of one circular partition plate 25, and this -partition square plate 25
and is joined to one divided end surface of the second valve parts 3 and 4. Also in this example, regardless of the phase shift between the first and second valve parts 3 and 4, the space between the divided end faces can always be closed.

Returning to FIG. 1 again, the pulse motor 17 and actuator 20 are actuated by an output signal from the central processing unit CpU. When the central processing unit CPU operates, the first valve part 3 receives input.
The signals corresponding to the opening θ, the engine boost pressure Pb, the engine rotational speed He, and the vehicle speed V, as well as the auto cruise signal C, are processed according to a predetermined program, and an output signal based on the result is sent to the pulse motor 17 and the operating signal. It is designed to be sent to a container 20.

Moreover, this central processing unit CpU has a function of stopping output by itself when an abnormality occurs.

Next, to explain the operation of this embodiment, the central processing unit CP
When U is in an inoperative state, not emitting an output signal, the actuator 20 pushes the support base 16 of the pulse motor 17 by the elastic force of the return spring 21, moves the second valve shaft 6 forward, and closes the clutch. 15 is kept connected, the first and second
The valve parts 3 and 4 are integrally connected in the same phase. Therefore, both valve portions 3 and 4 function as a single throttle valve 2, which can be opened and closed according to the amount of depression of the accelerator pedal 8.

When the central processing unit CpU is activated, first, the actuator 20 is excited by the output signal and pulls the support stand 16, moves the second valve shaft 6 backward, puts the clutch 15 in the disconnected state, and both valve parts 3, Break the connection of 4. Next, the second valve portion 4 is automatically opened and closed via the second valve shaft 6 by causing the pulse motor 11 to rotate forward or reverse in response to an output signal from the central processing unit CpU. Therefore, during normal operation, the second valve part 4 is given the best opening degree for fuel saving in accordance with the opening/closing state of the first valve part 3 operated by the operator, and the auto cruise signal C is At the time of input, autocruise operation is performed only by opening and closing the second valve portion 4.

When an abnormality occurs in the central processing unit CpU, the device CpU
Since the actuator 20 stops its operation by itself, the return spring 21 of the actuator 20 immediately pushes the support base 16 to connect the clutch 15 and connect both the valve parts 3 and 4 in the same phase. As a result, the operator can open and close both valve parts 3 and 4 at the same time without any trouble, regardless of the above-mentioned abnormality.

As described above, according to the present invention, the throttle valve provided in the intake passage of the engine to open and close the throttle valve is connected to the first valve part connected to the throttle valve operator and the second valve part connected to the pulse motor. A clutch is installed between the first and second valve parts, which can be switched between a connected state in which both valve parts can be opened and closed in the same phase, and a disconnected state in which each valve part can be opened and closed independently. So,
By disengaging the clutch and automatically controlling the pulse motor, it is possible to give the second valve the best opening degree in response to the open/closed state of the first valve based on the operator's operation. Therefore, it is also possible to automatically suppress the fuel consumption of the engine to the minimum necessary limit while ensuring responsiveness to the operator's operations. Further, when the clutch is connected, both valve sections can have the same function as a conventional throttle valve, so that it is possible to deal with failures in the control system.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG. 2 is a perspective view showing one embodiment of the present invention.
Figure 3 is an exploded perspective view of the main parts of Figure 1, Figure 4 is a perspective view showing a modification of the partitioning means between the first and second valve parts, FIG. 5 is a perspective view showing another modification;
FIG. 6 is a view taken in the direction of the ■ arrow in FIG. CPU... Central processing unit 1... Intake path, 2... Throttle valve, 3... First valve portion, 3
a...Boss, 4...Second valve part, 4α...Boss, 5
... first valve shaft, 6 ... second valve shaft, 8 ... accelerator pedal as a throttle valve operator, 13 ... clutch body, 1
4...Clutch hole. 15...Clutch, 11...Pulse motor, 20.
... Actuator, 22... Partitioning means patent applicant Honda Motor Co., Ltd. Denshi Giken Co., Ltd.

Claims (1)

[Scope of Claims] (1) A throttle valve provided in the intake passage of an engine to open and close it is divided into a first valve part connected to a throttle valve operator and a second valve part connected to a pulse motor. and these first
and a throttle valve for an engine, interposed between the second valve part and a clutch that can be switched between a connected state in which both valve parts can be opened and closed in the same phase, and a disconnected state in which each valve part can be opened and closed independently. Device. (2. In the engine throttle valve device according to claim 1, the coverage area of the first valve portion in the intake passage is set to be smaller than that of the second valve portion. (3) In the item described in claim (1) or (2), the throttle valve is a butterfly type throttle valve,
A throttle valve device for an engine, wherein the throttle valve is divided into first and second valve parts in a plane perpendicular to its rotation axis. (4) In what is stated in claim (3),
A throttle valve device for an engine, wherein a partition means is provided between the first and second valve parts to close a gap between the divided end faces when the phases of the two valve parts are shifted. (5) In what is stated in claim (3),
The clutch includes a wedge-shaped clutch body formed on a valve shaft that is slidably inserted into the boss of the second valve part, and a wedge-shaped clutch body formed on the boss of the first valve part so that the clutch body can be engaged and disengaged. An engine throttle valve device consisting of a wedge-shaped clutch hole.