JPS5853652A - Throttle opening controller of internal-combustion engine - Google Patents

Abstract

PURPOSE:To eliminate the necessity for using an idle switch further perform cost down of a divice, by referring to an actual opening and opening deviation and performing dicision whether a throttle valve is in an idle position or not. CONSTITUTION:A device is constituted in such a manner that a decision unit 600, having a function equivalent to an idle switch (not shown in the drawing), is provided, referring to an actual opening (a) and opening deviation (c), whether a throttle valve 100 is in an idle position or not is detected, in accordance with the result, a driver unit 400 is operated and stopped. If the valve 100 is opened by an accelerator pedal, the actual opening (a) is increased, and the opening deviation (c) continues to be a negative value, if the deviation (c) lasts a negative condition for at least a certain time further the actual opening (a) is increased at least a certain value, the decision unit 600 stops the driver unit 400 while a throttle stopper 200 holds a control position (d). Then the pedal is released, if the valve 100 is returned to the idle position, the deviation (c) is removed, however, the decision unit 600 performs the detection to start operation of the driver unit 400.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a throttle opening control device for an internal combustion engine that controls the throttle opening during idling operation of the internal combustion engine.

FIG. 1 shows a block diagram of a conventional example of this type.

In this FIG. 1, reference numeral 100 denotes an internal combustion engine.
200 is a throttle stopper arm for operating the throttle valve 100 during idling operation of the internal combustion engine; 300;
400 is an opening sensor that detects the opening of the throttle valve 100, and 400 is an actual opening a known by this opening sensor 300.
A driver 500 detects whether the throttle valve 100 is at an idle position flK or not, and a driver 500 operates the throttle valve 100 through a throttle lever 200 pipe according to an opening deviation C between the target opening and a predetermined opening. , and is an idle switch that controls execution or stopping of the operation of the driver 400 depending on the result.

The configuration of the second fkk sputtle stopper 200 is shown in a schematic diagram. In the figure, 100 is the throttle valve mentioned above;
101 is that throttle lever, 200 is the above throttle lever? , 201 is the stop lever, and the throttle stopper 200 operates the stop lever 101 t'1 to open and close the throttle valve 100 in addition to operating the stop lever and the lever 201 up and down.

By the way, the idle switch 500 is structurally placed inside the throttle stopper 200, and by detecting the contact state with the throttle lever 101 and the lever 201, it is possible to determine whether the throttle valve 100 is at the idle position tK. It is detected whether or not.

In the nine-throttle opening control device configured as described above, if the actual opening a closes to the target amount [b] for some reason during idling operation of the internal combustion engine, the opening deviation C takes a positive value. As a result, the driver 400 opens the throttle valve 100 via the throttle stopper 200t, and the actual opening fa is eventually controlled by the target opening bK. Further, the same applies when the actual opening degree a opens contrary to this example.

Next, when the throttle @ 100 is opened by, for example, an accelerator pedal and the internal combustion engine is accelerated, the throttle valve cannot be operated by the throttle stop lever 9200, but in this case, the engine is driven by the action of the idle switch 500. The device 400 stops its operation, and the operating position a of the throttle stopper arm 200 is maintained.

Thereafter, when the accelerator pedal is released and the state shifts to an idle operating state, the idle switch 500 starts operating the driver 40, and the opening degree control described above is performed.

Incidentally, FIG. 3 shows a timing chart of the above operation.

T in the figure! The time t3 when the throttle valve 100 is opened and the vehicle is accelerated indicates the time when the throttle 9P100 returns to the idle state. Also, e is idle switch 5000
A control signal for the driver 400 at time tl~F
) h, the operation of the driver 400 is stopped.

By the way, in the above conventional example, the idle switch 5 is used to determine whether or not the internal combustion engine is in the idle operating state.
However, this type of switch generally requires high reliability and durability, and has the problem of being expensive.

The present invention has been made to eliminate the above-mentioned conventional problems, and an object of the present invention is to provide an inexpensive throttle opening control device for an internal combustion engine that does not require an idle switch.

Embodiments of a throttle opening control device for an internal combustion engine according to the present invention will be described below with reference to the drawings. FIG. 4 is a block diagram showing the configuration of one embodiment.
400 to 400 are the same as those in FIG.

Reference numeral 600 has the same function as the idle switch 500, and detects whether or not the throttle valve 100 is in the idle position, referring to the actual opening a and the opening deviation ct. This is a determining device that controls execution or stopping of the operation of the driver 400 depending on the result.

Next, the operation of the throttle opening control device for an internal combustion engine according to the present invention configured as described above will be explained. When the throttle 5P100 is opened by the accelerator pedal, for example, the actual opening IS increases and the 1 opening degree deviation C continues to have a negative value, but this opening degree deviation C continues to be negative for a certain period of time or more. , and during that time, if the actual open position [a rises above a certain value, the determiner 600 detects this, stops the operation of the driver 400, and holds the throttle stopper 200 at the position J.

Next, the accelerator pedal is released, and the throttle valve 10
0 returns to the idle position, the opening deviation C disappears, but
The determiner 600 detects this, starts the operation of the driver 400, and controls the opening degree.

Incidentally, FIG. 5 shows a timing chart of the above operation.
In the figure, tl is the time when the throttle valve 100 is opened, t3 is the time when the throttle valve 100 returns to the idle position, and ts is the time when the acceleration is detected by the determiner 600 and the driver 4
00 is stopped.

As described above, the determiner 600Fi has the same function as the idle switch 500 in the conventional example.

As is clear from the above description, according to the throttle opening control device for an internal combustion engine of the present invention, the actual opening a and the opening deviation C
Since the determiner determines whether or not the throttle valve is in the idle position by referring to the above, there is no need for the expensive idle switch used in the conventional example, and there is an effect that the system can be made at low cost. .

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing the configuration of a conventional throttle opening control device for an internal combustion engine, and Fig. 2 is a schematic diagram showing the configuration of the throttle opening control device for an internal combustion engine shown in Fig. 1. , FIG. 3 is a timing chart showing the operation of the throttle opening control device for the internal combustion engine shown in FIG.
FIG. 5 is a block diagram showing a throttle opening control device for an internal combustion engine according to the present invention, and FIG. 5 is a timing chart showing the operation of the throttle opening control device for an internal combustion engine according to the present invention. 100... Throttle valve, 200... Throttle stopper, 300... Opening sensor, 400... Driver, 600... Judgment device. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Makoto Kuzuno - Figure 1 Figure 2 + 1JI Figure 3

Claims (1)

[Claims] 1. When the internal combustion engine is idling, the throttle valve 1
A throttle stopper is operated, an opening sensor detects the opening of the throttle valve, and an opening sensor detects the opening of the throttle valve according to the opening deviation between the actual opening and a predetermined target opening. A driver that controls the opening degree of the throttle valve via a stopper 4, and an operation of the driver according to the actual opening degree or a value equivalent thereto and the opening degree deviation or a value equivalent thereto. 1. A throttle opening control device for an internal combustion engine, comprising a determining device that controls stopping, etc.