JPH086590Y2 - Abnormality warning device of constant speed running control device - Google Patents

Description

[Detailed Description of the Invention] [Outline] The present invention relates to an abnormality warning device for a constant speed traveling control device, which prohibits the constant speed traveling control when an abnormality is detected, and issues an alarm when the main switch is turned on thereafter. Output.

[Industrial application field]

The present invention relates to an abnormality alarm device that notifies a failure of a constant speed traveling control device.

[Conventional technology]

2. Description of the Related Art A constant speed traveling control device that controls a throttle valve of an internal combustion engine so that a vehicle speed reaches a predetermined set vehicle speed is widely used.

When the set switch is operated after the main switch is turned on, such a constant speed traveling control device stores the vehicle speed at that time as the set vehicle speed, and thereafter the actual vehicle speed (hereinafter, referred to as the actual vehicle speed) becomes the set vehicle speed. Control so that Further, when the constant speed traveling control device detects that there is an abnormality in the vehicle speed sensor that detects the actual vehicle speed, the actuator that opens and closes the throttle valve, or the like, it determines that the control cannot be performed thereafter, and the power indicator, for example, is displayed. It is configured to prohibit the constant speed traveling control after flashing a predetermined number of times (for example, 5 times) to give an alarm indicating that the vehicle is in an abnormal state.

[Problems to be solved by the device]

If an abnormality is detected during constant-speed traveling control, the driver notices that the abnormality has occurred because the constant-speed traveling control is released and the vehicle speed begins to decrease, and the power indicator flashes. Cheap.

However, if an abnormality is detected while the constant-speed running control is not being performed, the phenomenon other than the alarm such as the decrease in vehicle speed does not occur, so the alarm of the abnormality occurrence due to the blinking of the power indicator may not be noticed. is there. In such a case, even if the driver turns on the main switch and operates the set switch, the constant speed travel control is not started, but the driver mistakenly thinks that the cause is a simple contact failure of the switches, There is a risk of operating the switch many times.

The present invention solves such a problem, and an object of the present invention is to provide an abnormality alarm device of a constant speed traveling control device which surely informs a driver that constant speed traveling control is prohibited. And

[Means for solving the problem]

In order to solve the above problems, the present invention provides an abnormality of a constant speed traveling control device that prohibits constant speed traveling control in response to an abnormality signal output from an abnormality detecting means for detecting an abnormality of the constant speed traveling control device. In the alarm device, a main switch for operating the constant speed traveling control device and an alarm for outputting an alarm when the main switch is operated from OFF to ON while the constant speed traveling control is prohibited It is characterized by having means.

[Action]

When the main switch is operated in a state where the abnormality detection means detects an abnormality and the constant speed traveling control is prohibited, the alarm means outputs an alarm.

Therefore, the driver can know that an abnormality has occurred in the constant speed traveling control device by outputting an alarm in conjunction with the turning on of the main switch.

[Example of device]

Embodiments of the present invention will be described below with reference to the drawings. First
FIG. 1 is a block diagram showing an embodiment of the present invention, and shows, as an example, one for detecting a failure of an actuator system.

The set switch SW1 is for starting the constant speed traveling control, and the cancel switch SW2 is for canceling the constant speed traveling control. The cancel switch SW2 corresponds to a plurality of switches such as a brake switch and a clutch switch, but here only one is shown as a representative. One end of each of the set switch SW1 and the cancel switch SW2 is grounded, and the other end is connected to the microcomputer 1 which is a control circuit.

Microcomputer (hereinafter referred to as microcomputer) 1
In response to signals from the set switch SW1, the cancel switch SW2, the vehicle speed sensor 6 and the like, the actuator 4 controls the opening / closing of the throttle valve 5 to perform constant speed traveling control.

The power supply unit 2 supplies power from the battery B to each part, and the power supply Vcc and the voltage of the power supply B are obtained by stabilizing the voltage (for example, 12V) of the power supply B provided through the ignition switch Ig by the regulator Reg. The power supply VD supplied according to the on / off of the switch 21 having the self-holding function is output. The main switch SW3 is an operation switch for switching the on / off state of the self-holding switch 21, and the main switch SW3 is the self-holding switch 2
It is connected to 1 and the microcomputer 1, and the microcomputer 1 can detect the on / off state of the main switch SW3.

Then, the self-holding switch 21 is turned on / off every time the main switch SW3 is turned on, and when the self-holding switch 21 is on, the microcomputer 1 detects an abnormality and a cut signal is sent from the microcomputer 1. It is configured to remain off when CT is applied.

The drive circuit 3 drives the motor by supplying the power supply VD to the motor M of the actuator 4 in response to the opening / closing signal SC output from the microcomputer 1.

The actuator 4 includes a motor M, a clutch 41, and a solenoid L1 that connects / disconnects the clutch 41. The clutch 41 is connected to rotate the motor M to open / close the throttle valve 5. The clutch 41 and the solenoid L1 prevent the rotation of the throttle valve 5 from being interrupted by the motor M when the constant speed traveling control is released. The motor M and the throttle valve are controlled by the control signal SD from the microcomputer 1. It is configured to connect / disconnect between the five.

The potentiometer 8 detects the rotational position of the motor M, and is configured so that the slider 81 moves on the resistor R8 in conjunction with the rotary shaft of the motor M. This resistor R8
Has one end connected to the power supply Vcc via the resistor R1 and the other end grounded. Further, the slider 81 is connected to the power supply Vcc via the resistor R2, and is also connected to the microcomputer 1 via the resistor R3 and the A / D converter 7. Therefore,
The voltage data from the A / D converter 7 changes according to the position of the rotating shaft of the motor M, and the microcomputer 1 feedback-controls the motor M based on this voltage data.

In the potentiometer 8, the slider 81 has a resistance R8.
Among them, a part of the center is slid. That is, even when the slider 81 is located closest to the ground of the resistor R8, the resistor is interposed between the slider 81 and the ground. Therefore, when the potentiometer 8 is normal, the voltage applied to the A / D converter 7 changes within a range larger than 0V and smaller than the voltage of the power source Vcc.

Also, one end side (ground side) of the resistor R81 is disconnected,
When the contact failure between the slider 81 and the resistor R8 occurs, the voltage of the power supply Vcc is applied to the A / D converter 7. Furthermore, if the slider 81 of the potentiometer 8 is grounded,
A voltage of 0V is applied to the A / D converter 7. In this way, when the potentiometer 8 fails, a voltage different from that in the normal state is applied to the microcomputer 1 via the A / D converter 7, whereby the microcomputer 1 detects an abnormality of the potentiometer 8. be able to.

When the microcomputer 1 detects the failure of the potentiometer 8, it outputs the cut signal CT to extinguish the power source VD,
The drive of the motor M by the drive circuit 3 is prohibited.

The power indicator 9 lights up while the main switch SW3 is turned on and there is no failure, that is, when the constant speed traveling control is permitted, and blinks a predetermined number of times in association with the detection of the failure to give an alarm. Is.

The constant speed traveling control device 10 is configured with the above configuration.

Next, the operation of the constant speed traveling control device 10 will be described. FIG. 2 is a flowchart showing the operation of the microcomputer 1.

Ignition switch Ig is turned on and power supply Vc
When c is supplied, the process proceeds to step S1 and the initial setting (for example, performing the control permission process described later) is performed and the step
Move to S2.

In step S2, it is determined whether or not a failure has occurred. If no failure has occurred, the process proceeds to step S3 to perform control permission processing. That is, the control permission flag is set and the output of the cut signal CT is prohibited, and then the process proceeds to step S7. If it is determined in step S2 that a failure has occurred, the process proceeds to step S4.

In step S4, it is judged whether or not it is in the control prohibited state (state in which the control permission flag is reset and the cut signal CT is output), and if the control prohibited state, the process proceeds to step S7, and the control permitted state again. If so, the control permission flag is reset in step S5 in order to set the control prohibited state,
Outputs the cut signal CT. Then, in step S6, the power indicator 9 is blinked a predetermined number of times, that is, an alarm is output and the process proceeds to step S7.

In step S7, it is determined whether or not the main switch SW3 has changed from the off state to the on state. If the main switch SW3 has changed from the off state to the on state, the process proceeds to step S8, and if not, the process proceeds to step S10.

In step S8, it is determined whether the control is prohibited,
If it is in the control prohibited state, an alarm is output in step S9 similarly to step S6 and the process proceeds to step S10. If it is not the control prohibited state, the process proceeds to step S10.

In step S10, it is determined whether or not the control is permitted. If the control is permitted, the constant speed traveling control is performed (when the self-holding switch 21 is in the ON state, the set switch SW1, the cancel switch SW2, and the vehicle speed sensor 6). Control to output the opening / closing signal SC in response to the constant vehicle speed)
(Step S11), the process proceeds to step S2. If the control is prohibited, the process directly proceeds to step S2.

As described above in detail, in the present embodiment, if a failure occurs when the main switch SW3 is turned on, the power indicator 9 is made to blink to give an alarm. Easy to notice.

[Effect of device]

As described above in detail, according to the present invention, when a failure or the like occurs, the alarm is issued in conjunction with the turning on of the main switch, so that the driver can be effectively alerted. You can

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a flow chart showing the operation of the microcomputer 1. In the figure, 1: microcomputer, 2: power supply unit, 3: drive circuit, 4: actuator, 5: throttle valve, 8: potentiometer, 10: constant speed running control device, R1, R2, R3, R8: resistance, SW1:
Set switch, SW2: Cancel switch, SW3: Main switch.

Claims (1)

[Scope of utility model registration request] 1. An abnormality alarm device for a constant speed traveling control device for prohibiting constant speed traveling control in response to an abnormality signal output from an abnormality detecting means for detecting an abnormality of the constant speed traveling control device, A main switch for putting the control device into an operating state and an alarm means for outputting an alarm when the main switch is operated from an off state to an on state in a state where constant speed traveling control is prohibited are provided. Abnormality warning device of the characteristic constant speed running control device.