JPH0622544U - Accelerator control device - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention aims to provide an accelerator control device capable of centrally controlling the accelerator control based on the information corresponding to a large number of information input to the accelerator control device. . A control device is provided, which sets priorities for throttle request signals from an external controller, has a program for each throttle request signal, and performs control in accordance with the priority order.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an accelerator control device having a control device that drives throttle control means based on a signal from an accelerator sensor.

[0002]

[Prior art]

 In recent years, the number of electronic devices that require engine output control, such as auto cruise devices, vehicle speed limiting devices, transmission control devices and anti-spin regulators (ASR), has been increasing in commercial vehicles.

Therefore, a technique is known in which an actuator of a slot device that controls a diesel engine often mounted on a commercial vehicle is mounted on each electronic device, and one of the two signals is prioritized. There is.

[0004]

[Problems to be solved by the device]

 However, when there are three or more signals, the structure becomes complicated, which is inconvenient. Further, when contradictory conditions such as transmission control and ASR occur, a problem cannot be solved by this system alone.

An object of the present invention is to provide an accelerator control device that responds to an increase in information input to an accelerator control device and centrally controls accelerator control based on the information.

[0006]

[Means for Solving the Problems]

 According to the present invention, in the accelerator control device having the control device for driving the throttle control means based on the signal from the accelerator sensor, the accelerator control device has means for prioritizing the throttle request signal from the external controller. In addition, a control device having a program specified for each throttle request signal and performing control according to the priority order is provided.

[0007]

[Action]

 In the accelerator control device configured as described above, the accelerator control device actuates the control lever of the fuel injection pump via the throttle control means in response to a signal from the accelerator sensor.

Further, when a signal from a controller for controlling another electronic device is input, a required throttle opening is obtained based on a predetermined priority and an increase / decrease pattern of the throttle means, and the control signal is output.

Therefore, even if there are three or more input signals or signals having conflicting requirements, optimal and safe control is achieved.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, the accelerator sensor 1 is connected to an A / D converter 2, and the A / D converter 2 is connected to a control device 3. Further, a ROM 4, a RAM 5, and a D / A converter 6 are connected to the control device 3, and a DC motor 8 as throttle control means is connected to the D / A converter 6 via a servo amplifier 7. An opening sensor 9 is connected to the servo amplifier 7.

C / U # 1 and C / U # i, which are controllers that output external analog signals, are connected to the A / D converter 2 and are controllers that output external digital signals. C / U # i + 1 and C / U # n are connected to the digital input I / F 10. Further, the controllers C / U # 1 to C / U # n are connected to the D / A converter 6, respectively.

The operation will be described below with reference to FIG. 2 as well.

At the time of operation, first, the signal of the accelerator sensor 1 is read (step S1). Then, the limit signal from the external controller is read (step S2). It is determined whether or not there is a limit (step S3), and if NO, the target throttle output is output to the D / C motor which is an output means (step S7). In this case, referring to FIG. 3 as well, the relationship between the accelerator sensor and the injection pump (I / P pump) control lever opening may be any characteristic as indicated by X, Y, and Z.

If step S3 is YES, the limit signal No. is determined according to the priority shown in FIG. (Step S4), the limit signal No. 1 shown in FIG. The control method corresponding to the above is taken in (step S5), the target throttle opening degree is calculated by the restriction method (step S6), the target throttle opening degree is output (step S7), and the control ends, as described later.

FIG. 4 shows a case where an analog variable throttle limit signal is input to the control device 3 from an external controller (for example, C / U # 1). The upper part of FIG. 4 shows the opening time from the accelerator sensor. Degree signal (A) relationship, when the limit signal shown by the broken line (B) is input to the middle stage, the output that controls the lever opening by the D / C motor starts by correcting to the negative side with b1. , B2 is corrected to b3 on the positive side, and the limit signal returns to 0 at b4, and is output as a lower broken line (C) returning from c1 to c2, c3 and returning to c4.

FIG. 5 shows a case where a digital throttle limit signal is input to the control device 3 from an external controller (for example, C / U # n), and the accelerator opening signal in the upper stage is (a) with respect to time. If the limit signal (B) at the two middle stages is B / A = D / C and the throttle is limited at a constant rate (for example, 50%), the lever opening The output is shown as a broken line (C) in the lower row.

Further, in the above example, one limit signal is inputted to the signal of the basic accelerator sensor, but when two or more limit signals are inputted, as shown in FIG. The priority is determined by the priority stored in and is corrected as described above, so no problem occurs.

In the case of digital limitation, it is possible to change the limitation rate, for example, by a signal from another controller.

Further, the output output in step S7 is fed back to each external controller as necessary and output as a corrected accelerator sensor output.

[0021]

[Effect of device]

 Since the present invention is configured as described above, suitable control can be performed even when a large number of accelerator control signals are input.

Further, even if two or more signals are input, they are input according to the priority order, and therefore no problem occurs.

Since only one throttle actuator is required, the structure is simple.

[Brief description of drawings]

FIG. 1 is a block diagram of a control device showing an embodiment of the present invention.

FIG. 2 is a flowchart of the control of FIG.

FIG. 3 is a diagram showing a relationship between an output of an accelerator sensor and an I / P control lever opening degree.

FIG. 4 is a diagram showing a relationship among time, accelerator opening, analog limit signal, and lever opening.

FIG. 5 is a diagram showing the relationship among time, accelerator opening, digital limit signal, and lever opening.

FIG. 6 shows priority and limit signal No. stored in the control device. FIG.

FIG. 7: Restriction signal No. And FIG.

FIG. 8 is a diagram showing an example in which limit data is displayed with a throttle increase / decrease rate with respect to a reference.

FIG. 9 is a diagram exemplifying limit data in which a throttle opening is shown as a ratio.

[Explanation of symbols]

 1 ... Accelerator sensor 2 ... A / D converter 3 ... Control device 4 ... ROM 5 ... RAM 6 ... D / A converter 7 ... Servo amplifier 8 ... D / C motor

Claims (1)

[Scope of utility model registration request] 1. An accelerator control device having a control device for driving a throttle control means on the basis of a signal from an accelerator sensor, comprising means for setting a priority order to a throttle request signal from an external controller, and further comprising: An accelerator control device comprising a control device having a program specified for each throttle request signal and performing control in accordance with its priority order.