JPH0512094Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a self-diagnosis device for a constant-speed running device for automobiles, and in particular, the present invention is a self-diagnosis device for a constant-speed running device for an automobile, and in particular, it is capable of storing the input of a signal for starting constant-speed running in a state in which the reception of the signal is prohibited. and can be displayed during inspection.

[Conventional technology]

Constant speed driving devices for automobiles have a control function that stores the vehicle speed at the time the set switch is pressed and then drives the vehicle at a constant speed with that speed as the target, but generally the vehicle is driven at a speed lower or higher than a certain speed range. When the vehicle is running at a fixed speed, measures have been taken to prohibit the transition to constant speed driving even if the set switch is turned on. Therefore, if the driver presses the set switch without knowing that the vehicle is traveling in the speed range where constant speed driving is prohibited, the vehicle speed will begin to decrease from the moment the accelerator is released, resulting in a failure or malfunction of the constant speed driving device. If so, we may decide to send it in for inspection. However, at the inspection stage, there were no abnormalities in any parts, and the same phenomenon could not be reproduced, so the cause was unknown.

The same thing happens when you turn on the set switch in the cancel state and try to shift to constant speed driving, or when you turn on the resume switch and try to return to constant speed driving at the original memorized vehicle speed. arise. The cancel state is a state in which constant speed driving control is not being performed, so generally the set switch is
and Resium SW are accepted. However, if the set switch is turned on while the brake pedal is being released, the set switch will be turned on even though the brake switch has not yet been turned off (the control unit has determined that it is in the cancel state), so the control unit will not turn on the latter. I ignore it and it doesn't start driving at a constant speed. Lysium
The same applies to SW, and in these cases, the driver may determine that the constant speed traveling device is malfunctioning or malfunctioning.

[Problem that the invention attempts to solve]

This invention uses a set signal or resume signal to start constant speed driving (also includes the meaning of restarting, returning, etc.)
If a signal is input in a state in which reception of a signal is prohibited, it is stored and used for later inspection.

[Means for solving problems]

In this invention, when the set switch is turned on in the cancel state, the vehicle speed at that point in time is memorized and constant speed travel control is started with that vehicle speed as the target, and when the resume switch is turned on, the vehicle is driven at a constant speed based on the memorized vehicle speed before cancellation. In a self-diagnosis device for an automobile constant-speed running system that resumes running control, if input to the set switch or resume switch is prohibited when these switches are operated, the state and type of switch operated are stored in memory. This feature is characterized in that the content of the memory is stored and the contents of the memory are output to a display device by an output operation.

[Effect]

When operating the set switch (resume switch), if input to the set switch (resume switch) is prohibited due to the vehicle speed range where constant speed driving is prohibited or due to a cancel system switch being turned on, etc.
By remembering this state and the type of switch operated, constant speed driving can be started (resumed) at a later inspection.
This can be useful in determining the cause of a disorder.

〔Example〕

Fig. 1 is a block diagram showing an embodiment of the present invention, in which 1 is a vehicle speed sensor, 2 is a cancel system SW (switch) such as a brake or clutch, and 3 is a suspension system.
SW, 4 is set SW, 5 is constant speed traveling control device,
6 is an actuator that adjusts the throttle opening;
7 is an indicator lamp. The constant speed traveling control device 5 is a constant speed control section 5 using a microcomputer.
1, and includes a vehicle speed detection section 52 that detects the traveling vehicle speed from the output of the vehicle speed sensor 1, comparators 53 and 54 that compares the traveling vehicle speed with a high speed limiter vehicle speed and a low speed limiter vehicle speed, a diagnosis processing section 55, etc.

The comparator 53 outputs a set prohibition output when the traveling vehicle speed exceeds the high speed limiter vehicle speed (for example, 105 km/h), and prevents setting even if the set SW 4 is turned on. The comparator 54 performs this for low speed limiter vehicle speeds (for example, 35 km/h) or lower.

The diagnosis processing section 55 stores the set operation during the set prohibition period, and outputs the output to the indicator lamp 7 in accordance with the subsequent output operation. Figure 2 is a flowchart of this process. Output operation is, for example, vehicle speed
Set SW when driving at less than 16km/h or when stopped
This is accomplished by turning on 4 three times within two seconds.

FIG. 3 is a block diagram of main parts showing another embodiment of the present invention. In this example, the diagnosis processing unit 5 detects a simultaneous input in which the set SW 4 or the resume SW 3 is turned on when the cancel system SW 2 is turned on.
5. 56 and 57 are gate circuits for simultaneous input detection.

FIG. 4 is a flowchart showing the diagnosis process of this example. If control is inhibited or there is a cancel signal, it will enter cancel mode, and if the resume switch or set switch is turned on in this state,
Although this is not accepted during constant speed control, the diagnosis processing unit 55 stores this fact. The output operation in this case is different from the previous example, and the vehicle speed is 16 km/h.
This can be achieved by turning on the set switch twice in 2 seconds at less than 2 seconds.

[Effect of idea]

As described above, according to the present invention, the set SW
Alternatively, since these inputs are recorded while the resume SW is in the reception prohibited state, the cause of the failure to start constant speed driving can be easily determined during subsequent inspection.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a flowchart of the diagnosis process, FIG. 3 is a block diagram of main parts of another embodiment of the present invention, and FIG. 4 is a flowchart of the diagnosis process. In the figure, 1 is a vehicle speed sensor, 2 is a cancel switch, 3 is a resume switch, 4 is a set switch, 5 is a constant speed cruise control device, 6 is an actuator, 7 is an indicator lamp, and 55 is a diagnosis processing section.

Claims (1)

[Claim for Utility Model Registration] When the set switch is turned on in the cancel state, the vehicle speed at that point in time is memorized and constant speed driving control is started with that vehicle speed as the target, and when the resume switch is turned on, the memory before cancellation is stored. In a self-diagnosis device for an automobile constant-speed driving system that resumes constant-speed driving control based on the vehicle speed, if the input of these switches is prohibited when the set switch or resume switch is operated, the state and the operated switch are checked. 1. A self-diagnosis device for a constant speed vehicle for an automobile, characterized in that the type is stored in a memory and the contents of the memory are outputted to a display by an output operation.