JPH0343862Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention allows the vehicle to return to the original set vehicle speed by operating the resume switch and maintain constant speed even if the constant speed driving operation is canceled if the vehicle speed exceeds a predetermined speed. The present invention relates to a speed control device for an automobile having a resume function for restarting driving.

(Prior Art) Conventionally, as the above-mentioned speed control device for automobiles, there is, for example, a device described in Japanese Patent Application Laid-open No. 195838/1983.

In other words, when the set switch is turned ON, the vehicle speed is set for constant speed driving on the acceleration side, and when the coast switch is turned ON, the vehicle speed is set for constant speed driving on the deceleration side, and when driving at constant speed, the cancel signal from the brake switch etc. When the (auto cruise cancel signal) is input, the vehicle enters normal driving mode, and when the resume switch is turned on, it resumes constant speed driving at the original vehicle speed.

According to the above-mentioned conventional device, the vehicle speed during constant speed driving is displayed on the speed indicator, but when the constant speed driving is canceled and normal driving is performed, the vehicle speed during normal driving is displayed on the display. Therefore, the vehicle speed display for constant speed driving mentioned above disappears. Therefore, when returning to constant speed driving by turning on the resume switch, the previously set vehicle speed for constant speed driving becomes unknown.

In addition, if the normal driving described above is for a short time, the driver can remember the previous speed, but when the normal driving becomes long, the driver concentrates on driving, so the driver can remember the previous speed. I forget the speed of the vehicle when driving.

For this reason, when returning to constant speed driving, the driver becomes uncertain about how fast the vehicle will travel, especially if the road conditions are different from the previous constant speed driving.

On the other hand, Japanese Patent Application Laid-Open No. 58-48110 discloses a display device for a constant speed driving device that displays the memorized vehicle speed before canceling the constant speed driving (auto cruise) after temporarily canceling the constant speed driving (auto cruise). The following problems arose because the device was configured to continue displaying the set vehicle speed even after the resume switch was turned on.

In other words, if the set vehicle speed continues to be displayed even after the resume switch is turned ON, the memorized vehicle speed and actual vehicle speed may not necessarily match due to errors in the vehicle speed sensor or changes in road conditions, and this may cause the driver to There was a problem that made me feel uncomfortable.

(Purpose of the invention) This invention displays the original set vehicle speed when the constant speed driving operation is canceled, and turns off the display of the original set vehicle speed when the constant speed driving operation returns after the constant speed driving control is canceled. The present invention aims to provide a speed control device for an automobile that eliminates driver anxiety and improves safe driving, and does not give the driver a sense of discomfort.

(Structure of the invention) This invention provides an automobile equipped with a deceleration control means for controlling the actual vehicle speed to a set vehicle speed, a canceling means for canceling constant speed driving control, and a transition means for shifting to constant speed driving control. In the speed control device for a vehicle, a display means for displaying a set vehicle speed, and when the constant speed running control is canceled by the canceling means, the original set vehicle speed is displayed on the display means, and after the constant speed running control is canceled, the display means displays the original set vehicle speed. The present invention is characterized in that the speed control device for an automobile is provided with a display control means for turning off a display of the original set vehicle speed after shifting to constant speed driving control.

(Effect of the invention) According to this invention, when the constant speed driving operation is canceled by the above-mentioned canceling means, the display control means displays the original set vehicle speed on the above-mentioned display means, so that the driver can continue normal driving for a while. When returning to constant speed driving after a long period of driving, the previous vehicle speed can be confirmed, eliminating the feeling of anxiety when the vehicle speed is unknown. In addition, if the road conditions during constant speed driving become bad and it is judged that it is dangerous to continue driving at the previous speed, the above-mentioned transition means will resume constant speed driving control. By being able to check the vehicle speed in advance, it is possible to respond to danger by changing to a slower vehicle speed, etc., and this has the effect of improving safe driving.

Moreover, after the constant speed driving control is canceled and the transition means shifts to the constant speed driving control by the above-mentioned transition means, the display control means turns off the display of the original set vehicle speed. Even if there is a difference, it has the effect of eliminating discomfort for the driver.

(Example) An example of this invention will be described in detail below based on the drawings.

The drawing shows a speed control device for an automobile, and in FIG. 1, a constant voltage circuit 1 controls the power supply voltage of the control circuit to a constant voltage, and a main switch 2 controls the power supply of the control circuit to turn OFF and ON.

The CPU 3 executes control processing for each circuit device according to a program stored in a ROM (not shown).

The above-mentioned CPU 3 receives the vehicle speed sensor 4 signal whose waveform has been shaped by the waveform shaping circuit 5, and calculates the actual vehicle speed V based on this vehicle speed sensor signal.

The constant speed driving device is equipped with three manual switches, and when set switch 6 is turned ON, it outputs a speed increase signal, and when the ON operation is completed, the vehicle speed at that time becomes the set speed for constant speed driving (auto cruise). It is configured so that

The resume switch 7 is configured to output a signal for returning to the original constant speed driving when turned ON after constant speed driving is canceled.

When coast switch 8 is turned ON while driving at a constant speed, it outputs a deceleration signal, and when the ON operation is completed, the vehicle speed at that time is changed to constant speed driving (auto cruise).
The configuration is such that the set vehicle speed is .

Each of these switch signals is then input to the CPU 3 via the input interface 9.

The above-mentioned signal to cancel constant speed driving (auto cruise) (auto cruise cancel signal) is OR
This cancel signal is input via the circuit 10, but this cancel signal is input to the parking range (so-called P range),
Inhibitor switch 11 for neutral range (so-called N range), clutch switch 12 for clutch and brake, stop switch 13, 14
generated by the output from

In the figure, 15 is a key switch, 16 is a starter motor, 17 is a lamp checker, 18 is a stop lamp, and 19 is an inverter (inversion circuit).

The auto cruise actuator 20 is composed of, for example, a vacuum actuator, and operates the engine to run at a constant speed.
The drive operation is performed by inputting a control signal for constant speed running from the CPU 3.

In addition, the vehicle speed display 22 digitally displays the vehicle speed set for constant speed driving (set vehicle speed) and the actual vehicle speed during normal driving. The display driver 23 performs drive control based on the input.

The operation of the automobile speed control device configured as described above will be explained with reference to the flowchart of FIG. 2 and the time chart of FIG. 3.

The constant speed driving described above can be used within a set range of 40 to 100 km/h. In the first step 31, the CPU 3 reads the signal from the vehicle speed sensor 4 and determines the current vehicle speed, that is, the actual vehicle speed. After calculating v, it is determined whether the actual vehicle speed v is within the range between the lower limit vehicle speed v1 and the upper limit vehicle speed v2 (see auto cruise setting range in Figure 3), that is, whether it is a speed that allows constant speed driving. Determine whether

If the speed is such that constant speed driving is not possible, in a second step 32 the CPU 3 clears the set vehicle speed data (data stored in a ninth step 39, which will be described later), and then in a third step 33, the CPU 3 also clears the vehicle speed display data and the display by the vehicle speed indicator 22.

When the CPU 3 determines in the above-mentioned first step 31 that constant speed running is possible, in the fourth step 34,
The CPU 3 determines whether the set switch 6 has been turned on for a predetermined number of seconds longer than the time required to be turned on.
When it is determined that the set switch 6 is ON, in the fifth step 35, the CPU 3 turns on the set switch 6.
Determine whether the OFF operation has been performed.

If the above-mentioned set switch 6 remains ON, it means that the speed increase signal for the vehicle speed setting is being input while the switch 6 is turned ON.
At the sixth step 36, the CPU 3 determines whether a flag indicating cancellation of constant speed running (cancel flag) has been set, and when the cancel flag is reset, at the seventh step 37, the CPU 3 executes speed increase control processing. do.

That is, the CPU 3 controls the auto cruise actuator 20 to speed up the engine and increase the vehicle speed. The vehicle speed at this time is vehicle speed indicator 2.
Since the vehicle speed is digitally displayed every 1 km/h, the driver operates the set switch 6 while visually confirming the digitally displayed vehicle speed.

When the desired vehicle speed setting value is reached, the set switch 6 is turned off. This set switch 6
When the OFF operation is determined in the fifth step 35,
In the eighth step 38, the CPU 3 resets or clears the cancel flag, and in the ninth step 39
Then, the CPU 3 sets the vehicle speed when the set switch 6 is turned OFF as the vehicle speed setting for constant speed driving, and sets it in the RAM.
(not shown), and in a tenth step 40, the CPU 3 clears the vehicle speed digital display on the vehicle speed indicator 22, and in an eleventh step 41, the CPU 3
3 executes constant speed driving control processing at the set vehicle speed.

That is, the CPU 3 controls the auto-cruise actuator 20 to drive the engine at the set vehicle speed and execute constant-speed driving.

Next, in a twelfth step 42, the CPU 3 determines whether or not a cancel signal has been input. If there is no cancel signal, the process returns to the first step 31 and constant speed running is continued.

When a switch signal is generated from each of the switches 11 to 14 during the above-described constant speed running, each of these switch signals is input to the CPU 3 as a cancel signal (auto cruise cancellation signal).

At the 12th step 42, the CPU 3 determines that there is a cancel signal, and at the 13th step 43,
The CPU 3 sets a cancel flag, and in a fourteenth step 44, the CPU 3 cancels the constant speed driving control by the auto cruise actuator 20, and the engine returns to normal operation.

Then, in a fifteenth step 45, the CPU 3 controls the vehicle speed display 22 to digitally display the previously stored set vehicle speed. This digital display of the set vehicle speed will be useful during the resume operation described later.

In the fourth step 34 described above, the set switch 6
If it is determined that the operation is not
6, the coast switch 8 of the CPU 3 is turned on for a predetermined second.
Determine whether or not the coast switch 8 has been operated.
When it is determined that the ON operation is performed, the 17th step 47
Then, the CPU 3 determines whether or not the coast switch 8 has been turned off.

If the above-mentioned coast switch 8 remains in the ON state, it means that the deceleration signal for the vehicle speed setting is being input while the coast switch 8 is in the ON state, so in the 18th step 48, the CPU 3 starts driving at a constant speed. It is determined whether or not the cancel flag is set, and when the cancel flag is reset, the CPU 3 executes deceleration control processing in a 19th step 49.

That is, the CPU 3 controls the auto cruise actuator 20 to decelerate the engine and reduce the vehicle speed. The vehicle speed at this time is vehicle speed indicator 2.
2, the driver operates the coast switch 8 while checking the digitally displayed vehicle speed.

When the vehicle speed is set to be decelerated to the desired speed, the coast switch 8 is turned off. When it is determined in the 17th step 47 that the coast switch 8 has been turned OFF, the process proceeds to the 8th step 38, and thereafter the vehicle is driven at a constant speed at the set deceleration speed.

When it is determined in the above-mentioned 16th step 46 that the coast switch 8 is not operated, in the 20th step 50, the CPU 3 determines whether or not the resume switch 7 has been operated for a predetermined period of time, and turns the resume switch 7 on. When it is determined that the resume switch 7 is ON, the CPU 3 switches the resume switch 7
Determine whether or not the OFF operation has been performed.

When the above-mentioned resume switch 7 is in the ON state, the process moves to the 12th step 42, but when it is determined that the switch 7 is turned OFF, control processing for returning to constant speed running is performed.

That is, before the resume switch 7 is turned ON, the vehicle is running normally, and this normal running is performed based on the input of the cancel signal, so the cancel flag has already been set in the 13th step 43, and At a fifteenth step 45, the set vehicle speed for constant speed driving upon return is digitally displayed on the vehicle speed display 22.

Therefore, by visually checking the digitally displayed set vehicle speed, the driver can confirm the vehicle speed of constant speed driving at the time of return, and can perform the resume operation with peace of mind.

When the above-mentioned resume switch 7 is turned off, the CPU 3 resets the cancel flag in the 22nd step 52, and resets the cancel flag in the 23rd step 53.
The CPU 3 reads the set vehicle speed stored in a predetermined area of the RAM, further calculates the actual vehicle speed V based on the signal from the vehicle speed sensor 4, and determines whether the actual vehicle speed V is equal to the stored set vehicle speed. Determine.

If both vehicle speeds are equal, it means that the previously set vehicle speed has been returned, so in the 24th step 54,
The CPU 3 clears the digital display of the set vehicle speed on the vehicle speed display 22, and in the 25th step 55,
The CPU 3 executes constant speed driving at the set vehicle speed that was set before the cancellation.

When it is determined in the above-mentioned 23rd step 53 that the actual vehicle speed and the stored set vehicle speed are not equal,
At the 26th step 56, the CPU 3 determines whether the actual vehicle speed V is greater than the set vehicle speed. If it is determined to be greater, at the 27th step 57, the CPU 3 executes deceleration control processing, and this deceleration is 23rd step 5 above
3, the process is repeated until it is determined that the vehicle speeds are equal.

Further, when it is determined in the above-mentioned 26th step 56 that the actual vehicle speed V is smaller than the set vehicle speed, the process proceeds to the 28th step 56.
At step 8, the CPU 3 executes speed increase control processing, and this speed increase is continued until it is determined that the vehicle speeds are the same at the 23rd step 53 described above.

In this way, the above-mentioned resume processing is carried out in the 20th to 28th steps 50 to 58, and the set vehicle speed is digitally displayed during this processing, that is, until the digital display is cleared in the 24th step 54.

When the ON operation of the resume switch 7 is not determined in the above-mentioned 20th step 50, the CPU 3 determines whether or not the cancel flag is set in the 29th step 59, and determines whether the cancel flag is set. If this occurs, the vehicle is traveling under normal driving operation, and when it is determined that the cancel flag is reset, the vehicle is traveling at a constant speed, so the vehicle continues to travel.

In summary, the above-mentioned release means (each switch 1
1 to 14), the display vehicle speed means (see display driver 23) displays the set vehicle speed on the above-mentioned display means (see vehicle speed display 22), so the driver can normally When returning to constant speed driving (autocruise) after driving for a long time, the previous vehicle speed can be checked, which has the effect of eliminating anxiety caused by not being able to check the vehicle speed.

In addition, the above-mentioned transition means (resume switch 7
If there is a concern that the vehicle will be traveling at the previous speed due to a change in road conditions during constant speed driving, the vehicle speed can be confirmed in advance at the time of restoration, so the vehicle speed can be changed to a reduced speed, etc. This has the effect of improving safe driving.

Moreover, after the constant speed control is canceled and the transition is made to constant speed driving control by the above-mentioned transition means (refer to the resume switch 7), the display control means (refer to the display driver 23) also turns off the display of the original set vehicle speed. Even if there is a difference between the set vehicle speed and the actual vehicle speed due to some factor, this has the effect of eliminating the discomfort felt by the driver.

In the correspondence between the configuration of this invention and the above embodiment, the speed control means of this invention corresponds to the auto cruise actuator 20 of the embodiment, and similarly, the release means corresponds to each switch 11 to 14. Correspondingly, the transition means corresponds to the resume switch 7, the display means corresponds to the vehicle speed indicator 22, and the display control means corresponds to the display driver 23. However, this invention has the structure of the above-mentioned embodiment. It is not limited to only.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, and FIG. 1 is an electrical system diagram showing the configuration of a speed control device for an automobile, FIG. 2 is a flow chart, and FIG. 3 is a time chart. 7...Regium switch, 11, 12, 1
3, 14...Switch, 20...Auto cruise actuator, 22...Vehicle speed indicator, 23...
display driver.

Claims (1)

[Claims for Utility Model Registration] Deceleration control means 20 for controlling the actual vehicle speed V to the set vehicle speed, and canceling means 11 to 14 for canceling the constant speed running control.
and a transition means 7 for shifting to constant speed driving control, a display means 22 for displaying the set vehicle speed, and when the constant speed driving control is canceled by the canceling means 11 to 14, the above display. A display control means 23 that causes the means 22 to display the original vehicle speed setting, and after the constant speed driving control is canceled and the transition means 7 shifts to the constant speed driving control, the display control means 23 turns off the display of the original vehicle speed setting. speed control device.