JPS5870030A - Apparatus for correcting opening of throttle valve - Google Patents

Abstract

PURPOSE:To correct finely the suction throttle valve of an internal combustion engine, by providing an actuating apparatus for correting the opening of the throttle valve, and a control apparatus for actuating the actuating apparatus such that said opening is further corrected. CONSTITUTION:The opening of a throttle valve 4 is corrected by an actuator 6 through a rod 5. When a relatively small outer load group 36 is actuated, an electric current is passed to a solenoid 20 via an OR circuit 37 and an AND circuit 38 to cause the opening of the throttle valve 4 to be corrected in the first step so that the opening is increased more than the usual idle opening. When a relatively large outer load 41 is further added, an electric current is passed to a solenoid 28 of the control apparatus A by an AND circuit 40. As a result, the opening of the throttle valve 4 is corrected in the second step so that the opening is further increased than the opening at the time of correction by the first step. In this manner the opening of the throttle valve can be corrected finely and stepwise.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for use in an internal combustion engine, in which the opening of a throttle valve is corrected in stages according to the operating speed of the main power system and the magnitude of external load on the main power system. The present invention relates to a throttle valve opening correction device that can be effectively applied to a throttle valve in an intake system.

In general, when an external load is applied to the main power system during operation of the main power system including the engine, the operating speed of the main power system tends to decrease, especially when the main power system's operating speed is low. When an external load is applied to a vehicle, the operating speed of the main power system noticeably decreases, which not only impairs the smooth operation of the main power system, but also causes discomfort in vehicles such as automobiles. This causes the

Therefore, if an external load such as a headlight or near conditioner is applied while the main power system is operating, it may be possible to correct the opening of the throttle valve to a larger degree. If the opening of the throttle valve is corrected uniformly, depending on the size of the external load, the amount of correction of the opening of the throttle valve may be too small or too large.
It is still difficult to maintain smooth operation of the main power system, or the fuel consumption efficiency of the power source decreases, which is undesirable.

It is also possible to continuously correct the opening of the throttle valve in response to fluctuations in the operating speed of the main power system or the magnitude of external loads; The control device is complicated and expensive, and it cannot be said that it is necessarily ideal in practice at the present time.

In view of the above points, the main object of the present invention is to be able to compensate the opening degree of the throttle valve according to the operating speed of the main power system and the magnitude of the external load on the main power system, and to have a simple configuration. The object of the present invention is to obtain a practically effective throttle valve opening correction device.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example in which an embodiment of the present invention is applied to an intake throttle valve of an internal combustion engine installed in an automobile will be described below with reference to the drawings.

First, in FIG. 1, a throttle valve 4 is disposed downstream of the venturi pipe section 3 of the carburetor 1 through which the fuel nozzle 2 is opened, and the opening degree of the throttle valve 4 is determined by a rod 5. The corrective action of the actuating device 6 is applied via the actuating device 6. In the actuating device 6, a diaphragm 9 connected to the rod 5 is disposed in front of a fixed wall 7 having a communication hole 8 in the center, and a second diaphragm 11 is disposed behind the fixed wall 7. is installed. Since a return spring 10 is interposed between the diaphragm 9 and the fixed wall 7, the diaphragm 9 can close the throttle valve 4 while the room between the pair of diaphragms 9 and 11 is maintained at atmospheric pressure. It is maintained at a position where no opening correction is performed. In addition, in the center of the diaphragm 11, there is a movable strut (12) whose base end is fixed, and the distal end of this movable strut (12) penetrates the communication hole 8 and protrudes forward beyond the fixed wall 7. Then, when the chamber between the pair of diaphragms 9 and 11 is maintained in a negative pressure state, the diaphragm 9 deforms until it comes into contact with the tip of the movable stopper 12, and the throttle valve 40 moves in the direction of increasing the degree. Correct to.

A fixed stopper (12') is disposed behind the diaphragm 11, and while the interior of the rear chamber of the diaphragm 11 is maintained at atmospheric pressure, the diaphragm 11 is attached to the fixed stopper 12'.
However, when the chamber behind the diaphragm 11 is maintained in a negative pressure state, the diaphragm 11 deforms toward the fixed stopper 12', and the movable stopper 12 moves backward accordingly. By doing so, the throttle valve 4
The opening degree can be corrected to further increase the opening degree.

Next, the control device A for controlling the operation of the actuating device 6 will be explained. The chamber between the pair of diaphragms 9 and 11 communicates via a pipe 13 with a chamber 18 formed in the switching valve device 15, and this chamber 18 communicates with a negative pressure section in the intake pipe of the engine via a pipe 22. The chamber 19 is connected to a negative pressure source 23 such as
This chamber 19 further communicates with the atmosphere via a filter 24. In the chamber 18 there is a valve body 2.
1 is disposed therein, and a solenoid 2o for driving the valve body 21 is disposed within the chamber 19.

While the solenoid 20 is not energized, the valve body 21 opens the valve hole of the partition wall 17, and at this time, the chamber between the pair of diaphragms 9, 11 is filled with the pipe 13, the chambers 18, 19,
The atmospheric pressure is maintained by communicating with the atmosphere through the filter 24, and when the solenoid 20 is energized, the valve body 21 blocks the valve hole of the partition wall 17, and as a result, the pair of diaphragms 9, 11 The chambers in between are tube 13, chamber 1B, and tube 22.
It is placed in a negative pressure state by communicating with a negative pressure source 23 via.

The rear chamber of the diaphragm 11 communicates via a pipe 14 into a chamber 26 formed in the switching valve device 16, which chamber 26 communicates via a pipe 30 with a negative pressure source 23 and , is adjacent to a chamber 27 via a partition wall 25 having a valve hole in the center, and this chamber 27 is further communicated with the atmosphere via a filter 31. A valve body 29 is disposed within the chamber 26, and a solenoid 28 for driving the valve body 29 is disposed within the chamber 27.

While the solenoid 28 is not energized, the valve body 29 opens the valve hole of the partition wall 25, and at this time, the rear chamber of the diaphragm 11 is exposed to the atmosphere via the pipe 14, the chambers 26 and 27, and the filter 31. When the solenoid 28 is energized, the valve element 29 disconnects the valve hole of the partition wall 25, and as a result, the diaphragm 11
The rear chamber is connected to the negative pressure source 2 via the pipe 14, the chamber 26, and the pipe 30.
3, it is placed in a negative pressure state.

The relatively small external load group 36 whose power source is the power of the main power system including the engine includes, for example, an external load 32 such as a headlight or small light, an external load 33 such as a heater lower, and an external load such as a rear hot wire. 34, an external load 35 such as a cooling fan, etc., and these external loads 36 immediately generate a signal when put into operation, and the signal is ANDed via an OR circuit 37.
The signal is sent to the circuit 38.

Further, the main power system operating speed responsive signal generator 39 generates a signal when the engine rotation speed is 1500 R1) M or less, or when the vehicle speed is 20 krn per hour or less, and sends the signal to the AND circuit 38 and the AND circuit. 40, and a relatively large external load 41, such as an air conditioner, which is powered by the power of the main power system, generates a signal as soon as it is put into operation. The signal is sent to an AND circuit 40.

When the AND circuit 38 generates an output signal, the solenoid 20 is energized, and when the ANI) circuit 40 generates an output signal, the solenoid 28 is energized.

Since the embodiment shown in FIG. 1 is configured as described above, the engine speed is 1500RP, III
Or in a driving state where the vehicle speed is 20km/h or less,
When at least one external load from the group of relatively small external loads 36 is applied, the AND circuit is de-energized. As a result, the chamber between the pair of diaphragms 9 and 11 is placed in a negative pressure state, so that the first stage opening correction is performed so that the throttle valve opening is increased by 40 degrees compared to the normal idle opening. Ru.

When a relatively large external load 41 is applied in addition to the state in which the first stage opening degree correction is performed, the AND circuit 4
0 also generates an output signal and solenoid 2B is energized. As a result, the rear chamber of the diaphragm 11 is also placed in a negative pressure state, so that the second-stage opening correction is performed so that the opening of the throttle valve 4 is further increased than the opening due to the first-stage correction. Ru.

If the engine speed exceeds 1500 RI) or the vehicle speed exceeds 20 km/h, the main power system operating speed responsive signal generator 39 will stop generating the signal, or all of the external load group 36 will stop operating. In the case of (2), the solenoid 20 is not energized, and as a result, the opening degree of the throttle valve 4 can become the normal idle opening degree without being corrected.

FIG. 2 shows a modification of the embodiment shown in FIG. The main power system operating speed response signal generator 39' indicates whether the engine speed is 15007? When PA/F1 or vehicle speed is less than 20km/h, the signal is output to AND circuit 3.
B'M and AND circuit 40, and also if the engine speed exceeds 1500 RPAf or the vehicle speed is 2/hr.
When the distance exceeds 0km, the signal is sent to the AND circuit 42.
In addition, the external load 41 generates a signal as soon as it is put into operation, and sends the signal to the AND circuits 40 and 42. The output signal of 42 is sent to solenoid 20 to energize solenoid 20.

The rest of the structure of the embodiment shown in FIG. 2 is exactly the same as the structure of the embodiment shown in FIG. The symbol is used as is.

Since the embodiment shown in FIG. 2 is constructed as described above, the relatively small external load group 36 can be applied under operating conditions where the engine speed is 1500 R/''M or less or the vehicle speed is 20 km/h or less. When at least one of the external loads is applied, the AND circuit 38 generates an output signal, energizing the solenoid 20, and placing the chamber between the pair of diaphragms 9 and 11 in a negative pressure state.
The first stage opening correction is performed so that the throttle valve 40 degrees is increased more than the normal idle opening.

When a relatively large external load 41 is applied in addition to the first stage opening correction, the AND circuit 40 also generates an output signal and the solenoid 28 is energized, causing the back of the diaphragm 11 to Since the chamber is also placed in a negative pressure state, the opening degree of the throttle valve 4 is corrected in the second stage so as to be further increased than the opening degree obtained by the first stage correction.

When the engine speed exceeds 150 ORPM or the vehicle speed exceeds 20 km/h, the external load 41
is applied, the AND circuits 38 and 40 do not generate an output signal, but the AND circuit 42 generates an output signal, which energizes the solenoid 20, and as a result, the opening degree of the throttle valve 40 becomes the opening degree of the first stage. Corrections are made.

In the embodiments shown in FIGS. 1 and 2, as the operating speed of the main power system, only the engine speed may be used, or only the vehicle speed may be used, or the engine speed and The reference value may be set in combination with the vehicle speed.

As described above, according to the present invention, when the operating speed of the main power system is lower than or equal to a preset speed, at least one of the external loads belonging to the preselected first range is When added to the system, a first stage correction is made to make the opening of the throttle valve larger than the normal idle opening, and in addition to the first stage correction state, a pre-selected second When an external load belonging to a certain range is applied to the main power system, the second stage correction is performed so that the opening of the throttle valve becomes wider than the opening due to the first stage correction. As a result, the opening of the throttle valve can be finely corrected step by step according to the operating speed of the main power system and the size of the external load on the main power system, creating a simple and highly practical actuating device and control. By using this device, it is possible to continue the smooth operation of the main power system, improve the engine braking effect, and further improve the consumption efficiency of energy sources such as fuel.

In addition, particularly according to the second invention, when an external load belonging to the second Hisashi Handa is applied to the main power system in a state where the operating speed of the main power system exceeds a preset speed, Since the first stage opening correction is performed on the throttle valve, even if the operating speed of the main power system exceeds the preset speed, the main power system will not be affected by a relatively large external load. It is possible to maintain good consumption efficiency of energy sources such as fuel while reliably preventing situations that would impede smooth operation.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a face plate correction device for a throttle valve according to an embodiment of the present invention, and FIG. 2 is a circuit diagram similar to FIG. 1 showing a modification of FIG. 1. A, A'...control device, 4...throttle valve, 6...actuation device, 32-35...
Relatively small external load, 41... Relatively large external load dli Patent applicant Honda Motor Co., Ltd.

Claims (1)

[Claims] ■ An actuating device (6) for correcting the opening of the throttle valve (4) to be larger than the normal idle opening, and a preset operating speed of the main power system. In the following conditions, an external load (32
- 35) When at least one external load is applied to the main power system, the operation is performed to perform a first stage correction in which the opening degree of the throttle valve (4) is made larger than the normal idle opening degree. When the device (6) is operated and an external load (41) belonging to a pre-selected second category is applied to the main power system in addition to the first stage correction state, the throttle valve (4) A control device (A,
Throttle valve opening correction device equipped with . ■ An actuating device (6) for correcting the opening of the throttle valve (4) so that it is wider than the normal idle opening and when the operating speed of the main power system is below a preset speed. is the external load (3) belonging to the first category selected in advance.
2 to 35), when at least one external load is applied to the main power system, the first stage correction is performed to make the opening degree of the throttle valve (4) larger than the normal idling opening degree. The actuating device (6) is actuated, and in addition to the correction state of the first stage, a preselected second range l is also set.
When an external load (41) belonging to the main power system is applied to the main power system, a second stage correction is performed to make the opening degree of the throttle valve (4) even larger than the opening degree obtained by the first stage correction. When the actuating device (6) is activated and the operating speed of the main power system exceeds a preset speed, an external load (41) belonging to the second range is applied to the main power system. a control device (A) that operates the actuating device to perform the first stage correction when the
') A throttle valve opening correction device.