JP3155089B2 - Vehicle control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for controlling a vehicle, and more particularly, to an accelerator pedal opening (depression amount).
And controlling the driving output characteristics of the vehicle according to

[0002]

2. Description of the Related Art Conventionally, as an example of this type of vehicle control device, as disclosed in Japanese Patent Application Laid-Open No. 63-246428, for example, a target value of operating characteristics of an on-vehicle engine is set in advance. There is known an apparatus that detects an actual operating state of an engine and controls the actual operating state of the engine to be the target value.

On the other hand, Japanese Patent Laid-Open Publication No. 54-40432 discloses that a distance between a vehicle and a preceding vehicle is detected when the vehicle is running, and when the distance between the vehicles becomes less than a predetermined value, a brake is automatically applied to stop the vehicle. It is shown that braking is performed.

[0004]

By the way, for example, in a traffic congestion state, when trying to follow the preceding vehicle with a certain inter-vehicle distance, when the preceding vehicle accelerates and the inter-vehicle distance changes, usually, the inter-vehicle distance changes. After the driver visually determines the change in the following distance, the accelerator pedal is operated to return the following distance to the target value.

However, since the accelerator pedal is operated after judging the change in the inter-vehicle distance from the preceding vehicle in this way, it is inevitable that the accelerator operation will be delayed, and the responsiveness is poor, and the response to the preceding vehicle is poor. There is a problem that the followability is reduced and the burden on the driver for operating the accelerator is increased.

[0006] The present invention has been made in view of mow斯, its object is considered how of controlling the running state of the vehicle based on a relationship preceding vehicle and in the conventional example of the latter <br / > To adjust the drive output characteristics of the vehicle according to the preceding vehicle, thereby increasing the responsiveness of acceleration without increasing the burden on the driver to operate the accelerator, while driving in congested traffic. <Br / The goal is to improve the ability to follow the front vehicle.

[0007]

In order to achieve the above objects resolving means for the], in the invention of claim 1, as in the conventional example of the former,
When the opening degree of the accelerator pedal as one of the driving states of the vehicle is detected, and the driving output characteristic of the vehicle is controlled to a target value according to the accelerator opening degree, the acceleration of the preceding vehicle is detected, The drive output characteristic of the host vehicle is set so that the acceleration becomes a predetermined higher acceleration than the acceleration of the preceding vehicle.

That is, according to the present invention, as shown in FIG. 1, in a vehicle control apparatus provided with a control means 17 for controlling the drive output characteristic of the vehicle in accordance with the opening degree α of the accelerator pedal, The front vehicle acceleration detecting means 18 for detecting the acceleration GVSP, and the own vehicle is in a traffic jam traveling state
A congestion detecting means 19 for detecting that receives the output of the preceding vehicle acceleration detecting means 18 and the jam detection means 19, congestion
When the congestion traveling is detected by the detecting means 19 , the driving of the control means 17 is performed so that the acceleration of the own vehicle becomes an acceleration larger by a predetermined value than the acceleration GVSP of the preceding vehicle detected by the preceding vehicle acceleration detecting means 18. And a correcting means for correcting output characteristics.

According to the second aspect of the present invention, the front vehicle acceleration detecting means 18 detects the distance between the front vehicle and the front vehicle.
5, the acceleration GVSP of the preceding vehicle is detected.

According to the third aspect of the present invention, the correcting means 20 detects the acceleration G of the front vehicle detected by the front vehicle acceleration detecting means 18.
When VSP changes to the increasing side, the drive output characteristic of the control means 17 is corrected.

[0011]

With the above arrangement, according to the first aspect of the present invention, when the vehicle is traveling, the traffic congestion detecting means 19 causes the vehicle to travel in a traffic congestion state.
When there is a vehicle traveling ahead when the vehicle is traveling, the acceleration GVSP of the preceding vehicle is detected by the front vehicle acceleration detecting means 1.
8, the correction means 20 receiving the output of the detection means 18 outputs the drive output of the control means 17 so that the acceleration of the own vehicle becomes a predetermined value greater than the detected acceleration GVSP of the preceding vehicle. The characteristics are corrected. By setting the acceleration of the own vehicle to an acceleration that is larger than the acceleration GVSP of the preceding vehicle by a predetermined value in this way, it is possible to compensate for a response delay in which the driver operates the accelerator pedal after the inter-vehicle distance changes due to a change in the acceleration of the preceding vehicle. And the ability to follow the front vehicle can be improved.

Also, the acceleration of the own vehicle is equal to the acceleration GVS of the preceding vehicle.
Since the drive output characteristic of the control means 17 is automatically corrected so that the acceleration becomes higher than P, there is no need to greatly change the depression amount of the accelerator pedal, and the accelerator operation by the vehicle driver can be reduced. .

Furthermore, when the vehicle is in a traffic jam driving state
Then, the correction means 20 operates to correct the drive output characteristic of the control means 17. During this traffic congestion, the vehicle speed change is large and the load on the accelerator operation is high. At this time, the drive output characteristics of the vehicle are corrected, so that the load on the accelerator operation can be reduced more effectively while following the preceding vehicle. Performance can be improved. Further, since the vehicle speed is relatively low during traffic congestion and the vehicle can be easily stopped, there is no problem even if the set acceleration of the own vehicle is set higher than that of the preceding vehicle.

According to the second aspect of the present invention, the front vehicle acceleration detecting means detects the acceleration GVSP of the front vehicle based on the output of the inter-vehicle distance sensor detecting the distance to the front vehicle.
It is only necessary to provide the inter-vehicle distance sensor 15 as an external sensor, and the front vehicle acceleration detecting means 18 can be easily obtained.

According to the third aspect of the present invention, the acceleration GVSP of the front vehicle detected by the front vehicle acceleration detecting means 18 increases,
That is, when the inter-vehicle distance to the preceding vehicle changes in a direction in which the inter-vehicle distance increases, the correcting means 20 corrects the drive output characteristic of the control means 17, so that the inter-vehicle distance to the preceding vehicle is reduced by setting a higher acceleration than the preceding vehicle. Thus, it is possible to reliably prevent the vehicle from approaching the front vehicle.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 shows an overall configuration of an embodiment of the present invention, wherein 1 is an engine mounted on a vehicle, and 2 is an output shaft 1 of the engine 1.
a Automatic transmission connected to a rear end of the transmission 2 via a torque converter 3 with a lock-up mechanism. The output shaft of the transmission 2 includes a propeller shaft 4, a differential device 5, and left and right shafts 6 and 6 extending in the vehicle longitudinal direction. Through the left and right rear wheels 7,
7 (drive wheels). Engine 1
An electric throttle valve 9 is provided in an intake passage 8 for supplying intake air to the throttle valve 9, and the drive of the throttle valve 9 is controlled by a throttle actuator 10. Reference numeral 11 denotes a cooling fan attached to the front end of the output shaft 1a of the engine 1.

The throttle actuator 10 controls the lock-up of the torque converter 3 and the transmission 2
The operation is controlled by a controller 12 for performing the speed change control. The controller 12 outputs an output signal of a vehicle speed sensor 13 for detecting a running speed VSP (vehicle speed) of the vehicle, an output signal of an accelerator opening sensor 14 for detecting an opening α of an accelerator pedal (not shown), and a front end of the vehicle body. Distance between the vehicle and the front vehicle that runs in front of the vehicle
At least an output signal of the inter-vehicle distance sensor 15 for detecting S and an output signal of a gear position sensor 16 for detecting the gear position G of the transmission 2 are input.

FIG. 2 shows a processing operation of the controller 12 for performing acceleration correction control during traffic congestion.
This will be described below. First, at step S1, the vehicle speed VSP becomes 3
It is determined whether it is greater than 0 km / hour. If this determination is YES for VSP> 30, the process ends, but VSP
If ≦ 30, the process proceeds to step S2, and the vehicle speed variation rate VS is calculated for each vehicle speed range. This vehicle speed fluctuation rate VS is
For example, it is obtained as a value obtained by dividing the vehicle speed standard deviation for 2 minutes by the average vehicle speed during the same period and multiplying by 100. Thereafter, in step S3, it is determined whether or not the vehicle speed fluctuation rate VS is greater than 10%. If this determination is NO for VS ≦ 10, the process ends. However, if VS> 10, the process proceeds to steps S4 and S5 to detect the acceleration GVSP of the preceding vehicle. That is, in step S4, the inter-vehicle distance DIS with respect to the preceding vehicle detected by the inter-vehicle distance sensor 15 is read at a constant period T (for example, one second period). Is calculated.

GVSP = (2 × DIS) / (T × T × 9.8) Thereafter, acceleration correction is performed in steps S6 and S7. That is, in step S6, the calculated acceleration G of the preceding vehicle is calculated.
An acceleration correction gain is set based on the VSP, and in the next step S7, as shown in the following equation, a map value GMAP from a preset basic acceleration map is multiplied by the acceleration correction gain and a constant “0.02 To correct the map value GMAP.

GMAP = GMAP × Acceleration Correction Gain + 0.02 The basic acceleration map shows the vehicle speed VSP and the accelerator opening α (indicated by “%” in FIG. 5) for each gear position of the transmission 2 as shown in FIG. 5 (a) shows the gear position G in the first speed, FIG. 5 (b) shows the gear position in the second speed, and FIG. 5 (c) FIG. 5D shows the case of the third speed, and FIG. 5D shows the case of the fourth speed.

After step S7, the process proceeds to step S8, in which the correction map value GMA obtained in step S7 is determined.
P is multiplied by a constant a to calculate a throttle opening correction value K,
It ends after a while.

FIG. 3 shows the processing operation of the throttle control performed by the controller 12. First, FIG.
In step S11, the accelerator opening α detected by the accelerator opening sensor 14 is read, and in step S12, the gear position G detected by the gear position sensor 16 is read. Next, in step S13, a basic throttle opening f (α) is obtained from a preset throttle opening map based on the accelerator opening α and the gear position G. Thereafter, the process proceeds to step S14, in which the target throttle opening THOUT is calculated by adding the throttle opening correction value K calculated in step S8 in FIG. 2 to the basic throttle opening f (α), and in step S15. A signal corresponding to the target throttle opening THOUT is output to the throttle actuator 10 to drive it, and then the process is terminated.

In this embodiment, the above steps S11 to S15
Thus, the control means 17 is configured to drive the throttle actuator 10 in accordance with the accelerator pedal opening α and the gear position G of the transmission 2 to change the throttle opening THOUT, thereby controlling the drive output characteristics of the vehicle. Have been.

Further, the steps S4 and S5 constitute front vehicle acceleration detecting means 18 for detecting the acceleration GVSP of the front vehicle based on the output of the inter-vehicle distance sensor 15 for detecting the distance to the vehicle traveling ahead. .

Further, the steps S1 to S3 constitute a traffic jam detecting means 19 for detecting that the vehicle is in a traffic jam traveling state.

Further, in steps S6 to S8, the outputs of the traffic congestion detecting means 19 and the preceding vehicle acceleration detecting means 18 are received. The basic acceleration GMAP of the vehicle is a predetermined value (= 0.02) greater than the acceleration GVSP of the front vehicle detected by the front vehicle acceleration detection means 18.
The correction means 20 is configured to correct the drive output characteristic of the control means 17 so that the acceleration is increased by G).

Therefore, in the above embodiment, during traveling of the vehicle, basically, the basic acceleration GMAP for each gear position G of the transmission 2 is obtained from the basic acceleration map, and the basic acceleration GMAP and the accelerator opening degree are obtained. α and the basic throttle opening f set according to the gear position G of the transmission 2
(Α), the target throttle opening THOUT is calculated, and the throttle actuator 1 is set so that the opening of the throttle valve 9 becomes the target throttle opening THOUT.
0 is controlled.

During this time, the vehicle speed VSP and its fluctuation rate VS are detected, and when the vehicle speed VSP is 30 km / h or less and the vehicle speed fluctuation rate VS exceeds 10%, it is determined that the vehicle is involved in traffic jam. , Acceleration GVSP of the front car
, The basic acceleration GMAP is corrected. Specifically, the acceleration GVSP of the front vehicle is determined from a change in the inter-vehicle distance DIS with the front vehicle detected by the inter-vehicle distance sensor 15, and the basic acceleration GMAP is calculated as the acceleration GVS of the front vehicle.
The acceleration is corrected so as to be larger than P by a predetermined value (= 0.02 G). And this basic acceleration GMAP
Is corrected, the target throttle opening THOUT is also corrected and the throttle actuator 10 is controlled.
The drive output characteristics of the vehicle are corrected. By setting the basic acceleration GMAP to an acceleration that is larger than the acceleration GVSP of the front vehicle by a predetermined value in this manner, it is possible to compensate for a response delay in operating the accelerator pedal after the inter-vehicle distance DIS changes due to a change in acceleration of the front vehicle. The ability to follow a car can be improved.

In addition, since the drive output characteristics are automatically corrected so that the basic acceleration GMAP is higher than the acceleration GVSP of the preceding vehicle, the vehicle speed changes greatly and the load of the accelerator operation is high, so that the traffic speed is high. Even so, there is no need to significantly change the amount of depression of the accelerator pedal,
The driver's accelerator operation can be reduced accordingly. Further, during a traffic jam, the vehicle speed VSP is relatively low and the vehicle can be easily stopped. Therefore, there is no problem even if the basic acceleration GMAP is set higher than the preceding vehicle.

Further, since the acceleration GVSP of the front vehicle is detected based on the output of the inter-vehicle distance sensor 15, only the inter-vehicle distance sensor 15 needs to be provided as an external sensor, and the acceleration GVSP of the front vehicle can be easily detected. it can.

The drive output characteristic may be corrected only when the acceleration GVSP of the front vehicle detected by the front vehicle acceleration detecting means 18 changes to the increasing side. By doing so, the basic acceleration GMAP is changed to the acceleration GVSP of the front vehicle.
Even if it is set higher, there is an advantage that the inter-vehicle distance DIS to the preceding vehicle is reduced and the approach to the preceding vehicle can be more reliably prevented.

In the above embodiment, the drive output characteristic of the vehicle is controlled by changing the output of the engine 1 by the throttle valve 9. However, this may be performed by controlling the transmission 2.

[0033]

As described above, according to the first aspect of the present invention, the acceleration of the preceding vehicle is detected, and the vehicle enters the traffic congestion state.
At one time, the drive output characteristics of the vehicle are corrected so that the acceleration of the own vehicle becomes an acceleration larger by a predetermined value than the acceleration of the preceding vehicle, thereby increasing the burden on the driver to operate the accelerator during traffic jam driving. Acceleration responsiveness can be increased without causing acceleration, and the burden of accelerator operation during traffic congestion
Can be more effectively achieved , and the ability to follow the preceding vehicle during traffic congestion can be improved.

According to the second aspect of the present invention, the acceleration of the front vehicle is detected based on the output of the inter-vehicle distance sensor for detecting the distance to the front vehicle. Can be

According to the third aspect of the present invention, the drive output characteristic is corrected when the acceleration of the preceding vehicle changes to the increasing side, so that the distance between the vehicle and the preceding vehicle decreases and the vehicle approaches the preceding vehicle. Can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of the present invention.

FIG. 2 is a flowchart showing a processing operation for performing acceleration correction control during traffic congestion in a controller.

FIG. 3 is a flowchart showing a processing operation for performing throttle control in a controller.

FIG. 4 is a plan view schematically showing a drive system of the vehicle.

FIG. 5 is a characteristic diagram of a map showing a relationship between an accelerator opening and a target acceleration at each gear position of the transmission.

[Explanation of symbols]

 Reference Signs List 1 engine 9 throttle valve 10 throttle actuator 12 controller 13 vehicle speed sensor 14 accelerator opening sensor 15 inter-vehicle distance sensor 16 gear position sensor 17 control means 18 front vehicle acceleration detecting means 19 congestion detecting means 20 correcting means VSP vehicle speed α accelerator opening DIS Inter-vehicle distance G Car position GMAP Basic acceleration GVSP Acceleration of preceding vehicle

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F02D 29/02 301 F02D 11/10 F02D 41 / 04,41 / 10 F02D 45/00 312

Claims (3)

(57) [Claims] 1. A control device for a vehicle with a control unit for controlling the drive output characteristic of the vehicle in accordance with the opening degree of the accelerator pedal, and the preceding vehicle acceleration detecting means for detecting an acceleration of the vehicle running ahead, the host Congestion detecting means for detecting that the vehicle is in a congested driving state
And, when the respective outputs of the preceding vehicle acceleration detecting means and the traffic congestion detecting means are received, and congestion traveling is detected by the traffic congestion detecting means,
Correction means for correcting the drive output characteristic of the control means so that the acceleration of the own vehicle is a predetermined value greater than the acceleration of the front vehicle detected by the front vehicle acceleration detection means. Vehicle control device. 2. The vehicle control device according to claim 1, wherein the front vehicle acceleration detecting means detects an acceleration of the front vehicle based on an output of an inter-vehicle distance sensor for detecting a distance from the front vehicle. A control device for a vehicle, comprising: 3. The vehicle control device according to claim 1, wherein the correction means includes a drive output characteristic of the control means when the acceleration of the front vehicle detected by the front vehicle acceleration detection means changes to an increasing side. A control device for a vehicle, wherein the control device is configured to correct the following.