JPS618434A - Throttle valve remote control device for vehicle - Google Patents

Abstract

PURPOSE:To enable to perform more precise control, by a method wherein plural types of detecting accel control amount-throttle valve control amount characteristics, set depending upon a minimum control amount of a control piece for accel, are selected to determine a throttle valve control amount. CONSTITUTION:An accel control amount detecting means 102 which detects a control amount of a control piece 100 for accel is provided, and in a minimum value memory means 104 which inputs an output thereform, the minimum value of a detecting accel control amount is stored. Further, a characteristics setting means 105 in which plural types of detecting accel control amount-throttle valve control amount characteristics are set is provided, and accel control amount- throttle valve control amount characteristics responding to the minimum value is selected by a characteristics selecting means 106. From the selected accel control amount-throttle valve control amount characteristics, a throttle valve control amount proportioning a detecting accel control amount is determined by a computing means 108, and a throttle driving means 110 is controlled in response to an output signal therefrom.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a method in which a throttle valve that is not mechanically connected to an accelerator operator is remotely controlled in accordance with the amount of operation of the accelerator operator. This invention relates to a vehicle throttle valve remote control device.

(Background of the Invention) This type of device has been proposed as disclosed in Japanese Patent Application Laid-open No. 59-58131, in which the position of the accelerator operator (referred to as the amount of operation) is controlled by a potentiometer or the like. It is detected as the amount of displacement.

Then, the throttle valve operation amount corresponding to the detected operation amount of the accelerator operator is determined from the preset accelerator operation amount-throttle valve operation amount characteristic, and the opening of the throttle valve can be controlled remotely according to the operation amount. It has been adjusted.

However, in the past, an accelerator operation detector was attached to the accelerator operator so that the detected accelerator operation amount was the same as the state in which the driver did not apply any load (referred to as the no-operation state). Na(Puhamabanabaranai,
Therefore, there is a problem in that a lot of effort and time are required to remove the problem.

(Object of the invention) The present invention has been made in view of the above-mentioned conventional problems,
The purpose is to facilitate the installation work of a device for detecting the operation amount of the accelerator operator and to improve its efficiency.

(Structure of the Invention) In order to achieve the above object, the present invention, as shown in FIG. Minimum value storage means 104 for storing a minimum value; Characteristic setting means 105 in which a plurality of detected accelerator operation amount-throttle valve operation amount characteristics are set; selecting an accelerator operation m-throttle valve operation amount characteristic corresponding to the minimum value; a characteristic selection means 106 for determining the throttle valve operation amount corresponding to the detected accelerator operation amount from the selected accelerator operation amount-throttle valve operation amount characteristic; and a throttle valve operation amount calculation means 108 for determining the throttle valve operation amount corresponding to the detected accelerator operation amount; and a throttle valve driving means 110 for driving the throttle valve.

(Function) With the above configuration, multiple detected accelerator operation amounts -
The throttle valve operation amount characteristic is prepared in advance, the minimum operation amount of the accelerator operator is memorized, the characteristic corresponding to the minimum value is selected, and the throttle valve operation amount is determined from this characteristic.

(Description of Embodiments) Hereinafter, preferred embodiments of the apparatus according to the present invention will be described based on the drawings.

In FIG. 2, the amount of depression (operation amount) of the accelerator pedal 10 is detected by the potentiometer 12, and the detected accelerator operation ff1200 sends the A/D converter 18 to the microcomputer 16 provided in the control signal generator 14. Supplied via.

The microcomputer 16 has an accelerator operation amount-throttle valve operation amount characteristic set in advance, and the throttle valve operation M2O2 determined from this characteristic is supplied to the motor driver 22.

The motor driver 22 then operates this throttle valve operation amount 2.
The servo motor 24 can be driven and controlled in accordance with 02, and the opening degree of the throttle valve 26 is adjusted by remote control using the servo motor 24.

As described above, in this embodiment, the accelerator pedal 10 and the throttle valve 26 are not mechanically connected.
Based on the amount of depression of the accelerator pedal 10, the accelerator operation amount - throttle valve 2 is determined according to the throttle valve operation fi1202 determined from the throttle valve operation amount characteristics.
6 is remotely controlled.

FIG. 3 shows the configuration of the accelerator pedal 10 (=J section), and the bracket 28 in the figure is installed upright on the floor 30 in front of the driver's seat.

An intermediate portion of an accelerator lever 32 having a generally doglegged shape is rotatably supported at the upper part of the bracket 28.

Furthermore, the accelerator pedal 10 is fixed to the front end of the accelerator lever 32.

Further, a tension spring 34 is stretched between the rear end of the accelerator lever 32 and the floor 30, so that the accelerator lever
The potentiometer 12 consisting of a sliding resistor or the like is mounted between the potentiometer 32 and the floor 30.

Further, an accelerator full open switch 36 is installed on the floor 30 in front of the bracket 28, and when the accelerator pedal 10 is not depressed, the accelerator full open switch 36 is moved counterclockwise in the figure to the limit position by the tension spring 34. When the accelerator pedal 10 is returned to , the accelerator pedal 10 is turned on, and the no-operation state of the accelerator pedal 10 is detected.

Switching signal 2 of Zarani accelerator full open switch 36
04 is supplied to the microcomputer 16 of the control signal generator 14 as shown in FIG.

This microcomputer 16 detects accelerator operationff
It is possible to store a minimum value of 1200.

Also, a plurality of detected accelerator operation amount-throttle valve operation amount characteristics are set in the memory J5, and these are represented by characteristics A, B, C, D, and E in FIG.

Furthermore, the characteristic corresponding to the minimum value can be selected from these. Therefore, the micro combi coater 16 can determine the throttle valve operation amount 202 corresponding to the detected accelerator operation ffi 200 from the selected characteristic.

The detection of the minimum value is terminated when the no-operation state of the accelerator pedal 10 is detected by the switching signal 204.

This microcomputer 16 also detects accelerator operation ff1200 (potentiometer 1 when not operated).
Since the output voltage of 2 is normally OV, the detected accelerator operation amount 200 at this time is also referred to as an initial error in the following. It is possible to calibrate the accelerator operation ff1200 by subtracting the initial error.

The detected accelerator operation m200 after this calibration was performed
A throttle valve operation amount 202 corresponding to the above is determined from the accelerator operation-throttle valve operation amount characteristic.

In this embodiment, as understood from FIG. 2, the opening degree of the throttle valve 26 is detected by the drive #J (4
) Potentiometer 38 for detecting valve opening degree by detection
is provided, and its detection signal is supplied to the microcomputer 16 via the A/D converter/IO as a feedback signal for controlling the opening.

The present embodiment has the above configuration, and its operation will be explained below with reference to the flowcharts of FIGS. 4 and 5.

Here, a case where the accelerator pedal 10 is not operated at the start of driving and a case where the accelerator pedal 10 is operated are sequentially explained.

First, a case where the accelerator pedal is not operated at the start of driving will be described.

The process shown in FIG. 4 starts when the vehicle starts driving, that is, when the ignition switch is operated to the accessory position or the ON position, and the first step (300)
In this step, it is determined whether a minimum value limit detection end flag, which will be described later, is set.

At the start of this operation, the minimum value limit detection end flag is not set, so this step (30
0), a negative determination is made and the process proceeds to the first step (301) in FIG.

In steps (301) to (303), the minimum value V min of the detected accelerator operation amount 200 is stored, and since the minimum value V min is 1 volt or less when the accelerator pedal 10 is not operated, step (305) Proceed to.

In this step (305), the detected accelerator operation amount at that time is stored as a storage value ASTSUT, and then in step (3,06), the characteristic A shown in FIG. 8 is selected.

When characteristic A is selected in this way, step (315
), and in this step (315), it is determined whether or not a thrower storage flag, which will be described later, is set. At the start of operation, the flag is not set, so a negative determination is made in step (315) and the process proceeds to step (316).

In step (316), the throttle valve opening degree when the accelerator pedal 10 is not operated is a digital amount (△FBAD).
In the next step (317), the throttle valve opening degree converted into a digital quantity is set to the stored value △FBSU.
It is stored as T.

Then, in step (318), the above step (317)
The throttle storage flag indicating the end of the processing operation is hit, and the process advances to step (319).

In this step (319), the accelerator full-open switch 36
It is determined whether or not the accelerator pedal 10 is in the ON state. In this case, since the accelerator pedal 10 is not operated, a positive determination is made, and the next step (320) does not indicate that the minimum value limit detection is to be ended. The minimum value limit detection end flag is set and the process advances to step (324) in FIG.

In this step (324), the potentiometer 12
The detected accelerator operation amount 200 detected by the valve opening detection potentiometer 38 and the valve opening of the throttle valve 26 detected by the valve opening detection potentiometer 38 are each converted into digital quantities.

In the next step (326), the accelerator pedal 10
Accelerator operation amount detected by a5 when no operation is detected
0 (ASTSUT), detection throttle operation ff1 (A
FBSUT> is subtracted from the accelerator pedal depression ff1200 (Δ5TAD> and throttle valve opening degree (ΔFBΔD) after its detection as an initial error, and the accelerator pedal depression ■ and throttle valve opening degree are calibrated accordingly. There is.

And in step (328), the above step (326)
A throttle valve operation amount 202 corresponding to the accelerator pedal depression amount calibrated in is searched from the accelerator operation amount-throttle valve operation amount characteristic on the memory table.

Note that if the throttle valve operation amount 202 corresponding to the accelerator pedal depression amount is not stored in this table, interpolation processing is performed and the throttle valve operation amount ff1202 is
is required.

Furthermore, in step (330), the above step (328)
The actual throttle valve opening with respect to the throttle valve operation amount 202 which is calculated and becomes the target value for throttle valve opening control (the calibration process is performed at step 326')
) The deviation (AST-AFB) of the deviation AFB> is determined, and in the final step (332), the throttle valve operation ff1202 with a value corresponding to this deviation is given to the motor driver 22 as the control target value Δθ. .

Next, the operation of the apparatus of this embodiment performed according to the above process will be explained using FIGS. 6 and 7.

At the start of operation when the ignition switch is operated to the accessory position or the on position and the defrosting voltage is supplied to the device of this embodiment, the accelerator pedal 10 is generally not operated and the accelerator pedal 10 is not depressed. It is said that

In this manner, when the accelerator pedal 10 is not depressed, the full-open accelerator switch 36 is turned on as shown in FIGS. 6 and 7.

At this time, potentiometer 12. If there is an error in the installation of the valve opening detection potentiometer 38, the sixth
7, even though the accelerator pedal 10 is not operated, initial errors of x and y occur in the potentiometer 12 and the valve opening detection potentiometer 38, respectively. ing.

These initial errors x, y are determined by the step (303) in FIG.
), (317) are each stored for the calibration process in step (326).

When these initial errors X and y are stored, the accelerator pedal depression amount and throttle valve opening degree which are subsequently taken in are calibrated using these (step 326), and the opening degree of the throttle valve 26 is controlled by them.

That is, using the accelerator pedal depression amount (AST'') calibrated in step (326), the accelerator operation amount -
Throttle valve operation ff12 from throttle valve operation amount characteristics
02 <AST) is determined as the target value (Step 3
28), the deviation of the throttle valve opening calibrated in step (326) from this target value (AST--8FB
) is calculated, and the throttle valve operation amount 2 is determined according to the deviation.
02 (Δθ>) is supplied to the motor driver 22 and the throttle valve 26 is operated to the target opening position.

As described above, when the accelerator pedal 1° is not depressed at the start of driving, the operating position corresponds accurately to the detected accelerator operation ff1200, but the accelerator pedal 10 is not necessarily depressed at the start of driving. It is not a condition.

Therefore, next, a case will be described in which the accelerator pedal 10 is operated at the start of driving (at the start of device operation).

In this case, one of the five characteristics A to E corresponding to the learned minimum value y min of the accelerator operation amount is selected as shown below, and the preset tolerance is determined by this selected characteristic. Equivalent amount of play (e.g. 0.5±0.1V,
Hereinafter, the detected accelerator operation amount is calibrated using the initial setting value (Vn), and this process is continued until the accelerator pedal 10 is not operated.

First, at the start of operation, the learning end flag described above is not set, so from step <300) to step (
Proceed to 301).

In steps (301) to (303), the minimum value of the detected accelerator operation f1200 is stored.

First, in step <301), the detected accelerator operation amount 200 is converted into a digital AST and read.

In the next step (302), the detected accelerator operation ff
It is determined whether 1200 is smaller than the minimum value vmin.

If it is determined in step (302>) that the detected accelerator operation amount 200 is smaller than the minimum value V min, then in the next step (3C) 3) this operation amount is set to a new minimum value V min.
It is stored as min.

In steps (304,) to (314), the above minimum value V
Any one of the characteristics A to E corresponding to min is selected.

That is, when the minimum value Vmin is Vmin<1, the process proceeds to step (305), where this minimum value V1n is stored, and characteristic A is selected in the next step (306).

When the minimum value Vmin is between 1≦Vmin<2, the process proceeds to step (307) and the initial setting value V is set. is memorized,
In the next step <308>, characteristic B is selected.

When the minimum value Vmi11 is between 2≦Vmin<3, the process proceeds to step <309), the initial setting value vO is stored, and the characteristic C is selected in the next step (310).

When the minimum value Vmin is 3≦vmin<4V, the process proceeds to step (311), where the initial setting value Vo is stored, and the characteristic is selected in the next step (312).

When the minimum value V min is 4≦■mi1'1, step (
Proceed to step 313) and set the initial setting value V. is stored and characteristic E is selected in the next step (314).

In this way a property is selected, and that property is passed to the step (
328) to calculate the target throttle valve opening.

Next, the operation of the apparatus of this embodiment performed according to the above process will be explained using FIG.

Abnormal value detection accelerator operation ('l:' f) at the start of operation
When fl 200, for example 4V, is output, as can be understood from its characteristics, the engine is limited to a certain rotation speed (for example, 200 rpm in the no-load direction), and even if the accelerator pedal 10 is depressed beyond that, the rotation speed will not change. is constant and the engine will not overrun.

Furthermore, if the accelerator pedal 10 is depressed at the start of driving and characteristic E is selected, when the amount of depression is decreased, the detected accelerator operation amount 200 decreases, and its minimum (lim)
i +1 also decreases. Therefore, the characteristic shifts from E to D.

When this characteristic is selected, the throttle valve is operated in the opening direction when the detected accelerator pedal operation amount reaches 4V or more.

When the amount of depression of the accelerator pedal 10 is further decreased, the characteristic shifts from D to C.

When this characteristic C is selected, the throttle valve is operated in the opening direction only when the detected accelerator operation amount 200 becomes 3V or more. Then, when the amount of depression further decreases, a transition is made to characteristic B.

When characteristic B is selected, the throttle valve is operated in the opening direction when the detected accelerator operation amount is 1V or more.

Further, when the accelerator pedal 10 is not operated, the characteristic shifts from B to A.

When characteristic A is selected, the throttle valve 26 will not be opened even if the accelerator pedal 10 is operated from its non-operated position to the position corresponding to the initial setting value VO.

As explained above, according to the present embodiment, the deviation of the detected accelerator operation ff1200 at that time with respect to the normal operation amount corresponding to the mechanical no-operation position of the accelerator pedal 10 is determined, and the deviation is used to control the accelerator pedal operation thereafter. Operation f
Since calibration is performed based on f1200, the potentiometer 12 that detects the amount of depression of the accelerator pedal 10
Even if errors or detection errors occur, these errors are automatically absorbed.

Therefore, it is possible to significantly reduce the labor and time required to remove the potentiometer 12, and it is also possible to use a potentiometer with a large detection error.

Furthermore, even if the no-operation detection position of the accelerator pedal 10 changes over time, the detection error is similarly absorbed, making maintenance extremely easy.

Further, when the potentiometer 12 deteriorates and an abnormal value of the detected accelerator operation amount 200 is output, the throttle valve 26 is controlled to the opening position corresponding to the amount of depression of the accelerator pedal 10 by the driver. The engine is not raced incorrectly, so no significant stress is placed on the engine due to overruns.

Since the feedback amount for throttle valve opening control is similarly calibrated, the accuracy of the valve opening control is improved.

Furthermore, the minimum value limit detection process (step 311), which is executed when the accelerator full-open switch 36 is turned on,
1 to 303), characteristic selection processing (steps 304 to 314)
) and throttle storage processing (steps 315-318
) is completed and only flowchart 1 in FIG. 4 is executed, so that the processing speed of the entire operation is increased and other processing can be performed in parallel.

In addition, in this embodiment, the minimum value V m detected up to now
Although five characteristics A to F are set according to in, the present invention is not limited to these, and it goes without saying that it may be difficult to use fewer characteristics than these, or even more characteristics.

(Effects of the Invention) As explained above, according to the present invention, the subsequent detected accelerator operation amount is calibrated based on the detected accelerator operation amount when the accelerator operator is in the mechanical non-operation position. Even if an error or a detection error occurs in the accelerator operation amount detection means for detecting the operation amount of the accelerator operator, those errors are automatically absorbed.

Therefore, it is possible to significantly reduce the labor and time required for accelerator operation m detection means (=i 4J), and it is also possible to use one with a large detection error.

Furthermore, even if the non-operation detection position of the accelerator operator changes due to aging, the detection error is similarly absorbed, making maintenance extremely easy.

Furthermore, if the accelerator operation m detection means deteriorates and an abnormal value of detected accelerator operation amount is output, the throttle valve is controlled to an opening position corresponding to the amount of depression of the accelerator operator by the driver. Therefore, the engine will not be raced erroneously, and therefore a large burden due to overrun will be avoided.In particular, according to the present invention, a plurality of detected accelerator operation amount-throttle valve operation amount characteristics are prepared in advance, and the accelerator operation The minimum operation m (minimum value) of the child is memorized, the characteristic corresponding to the minimum value is selected, and the throttle valve operation amount is determined from this characteristic. Also, the characteristic converges to the normal characteristic according to the minimum value. This allows for more detailed control.

Further, since the characteristics are stored in a linear form, the memory @I can be reduced by performing interpolation processing, and a large number of characteristics can be stored in memory.

[Brief explanation of the drawing]

Fig. 1 is a diagram corresponding to the claim of position B according to the present invention, Fig. 2 is an explanatory diagram of the configuration of the first embodiment of the device according to the present invention, Fig. 3 is an explanatory diagram of the configuration of the accelerator pedal attachment part, and Fig. 4 , FIG. 5 is a flowchart for explaining the operation of the device shown in FIG. 2, FIG. 6 is a diagram for explaining the accelerator operation amount calibration operation, FIG. 7 is an illustration for explaining the throttle valve operation amount calibration operation, and FIG. 8 is a diagram for explaining the operation of the throttle valve operation amount. FIG. 3 is an explanatory diagram showing characteristics of an example. 100...Accelerator operator 102...Accelerator operation amount detection means 104...Minimum value learning means 105...Characteristic setting means 106...Characteristic selection means 108...Throttle valve operation amount calculation means 110 ...
Throttle valve operating means 112... Throttle valve

Claims (1)

[Claims] (1) Accelerator operation amount detection means for detecting the operation amount of the accelerator operation element; Minimum value storage means for storing the minimum value of the detected accelerator operation amount; A plurality of detected accelerator operation amount-throttle valve operation amount characteristics are set. characteristic setting means for selecting an accelerator operation amount-throttle valve operation amount characteristic corresponding to the minimum value; and a characteristic selection means for selecting an accelerator operation amount-throttle valve operation amount characteristic corresponding to a minimum value; A throttle valve remote control device for a vehicle, comprising: a throttle valve operation amount calculation means for calculating a valve operation amount; and a throttle valve drive means for driving the throttle valve according to the throttle valve operation amount.