JPH10141491A - Vehicle control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assist deceleration by detecting a connecting path of different attribute from stored road information, setting a control section on the basis of an own vehicle position and the connecting path, and setting a change gear ratio of an automatic transmission within a range determined on the basis of prescribed driving operation. SOLUTION: Road information such as road classification in a proceeding direction, the position of a branch point between a superhighway and a ramp way, and the like is obtained from a data storage part 12 on the basis of an own vehicle position from a present position detecting part 13. Vehicle information is then obtained from a travel state detecting part 30, and a command determined by ramp way control routine is supplied to a shift control device 40, where a shift position is determined from vehicle speed and throttle opening on the basis of a shift position map. The upper limit command of the shift position is then inputted from a navigation processing part 11 and transmitted to an actuator. The shift position determined so as not to become larger by a shift position instruction signal is compared with the inputted upper limit value, and the smaller one is outputted as an instruction shift stage to the actuator. Shift based on a driver's intention can therefore by performed with accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle control device, and more particularly to a speed ratio control of an automatic transmission including a stepped transmission and a continuously variable transmission.

[0002]

2. Description of the Related Art There has been proposed a control device for an automatic transmission having a change means for changing a control pattern of the automatic transmission in accordance with road information around the current position of a vehicle (Japanese Patent Publication No. 6-58141). ).

[0003]

Generally, the speed limit between an expressway and a general road is different due to different road attributes such as road type and road width, and the speed at which a vehicle travels naturally is different. ing. Such roads having different road attributes (for example, an expressway and a general road) are generally connected by a connecting road called a rampway. In other words, when traveling from an expressway to a general road, the vehicle must pass through a rampway, but it is necessary to reduce the speed to below the speed limit of the general road while the vehicle is passing through the rampway. However, the above-described conventional control is applicable to roads, but cannot assist deceleration in response to changes in road attributes, such as when entering a general road from an expressway.

[0004] It is an object of the present invention to provide a vehicle control device capable of assisting deceleration when the attribute of a road on which a vehicle is traveling is changed during traveling.

[0005]

This and other objects are achieved by the present invention described below.

(1) Road information storage means for storing road information, own vehicle position detecting means for detecting the own vehicle position on the road, vehicle speed detecting means for detecting the vehicle speed, and attributes based on the stored road information Connecting road detecting means for detecting a connecting road connecting different roads, control section setting means for setting a control section based on the own vehicle position and the detected connecting road, and automatic transmission for automatically selecting a gear ratio. A gear ratio regulating means for determining a range in which a gear ratio can be changed from a vehicle speed in the control section; a driving operation detecting means for detecting a driving operation of a driver; and a gear ratio selected by the automatic transmission. And a gear ratio setting means for setting the speed ratio within a determined range based on a predetermined driving operation.

(2) The vehicle control device according to the above (1), wherein the driving operation detected by the driving operation detecting means is one or more of an accelerator operation, a brake operation, and a turn signal lighting.

(3) When the vehicle speed is within a predetermined range and an accelerator off operation and a brake on operation are detected, the speed ratio setting means sets the speed ratio within the determined upper limit range. (2)
The vehicle control device according to claim 1.

(4) The vehicle control device according to any one of (1) to (3), wherein the automatic transmission is a multi-stage transmission.

(5) The vehicle control device according to any one of (1) to (3), wherein the automatic transmission is a continuously variable transmission.

(6) The vehicle control device according to any one of (1) to (5), wherein the connection road detecting means detects a connection road between a main road on a high speed road and a general road.

(7) The vehicle control device according to any one of (1) to (6), wherein the control section setting means sets the control section based on a start point or an end point of a connection road.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One preferred embodiment of the present invention will be described below.
One will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing the configuration of the vehicle control device of the present invention. The vehicle control device 1 of the present invention includes a navigation system device 10, an AT mode selection unit 20, a traveling state detection unit 30
And a transmission control device (A / T ECU) 40.

The navigation system apparatus 10 includes a navigation processing unit 11, a data storage unit 12 as road information storage means, a current position detection unit 13, and a communication unit 15
, An input unit 16, a display unit 17, and an audio output unit 19. The navigation processing unit 11 performs various arithmetic processes such as a navigation process based on the input information, and outputs a result thereof to a central control unit (hereinafter, “CP”).
U ”) 111. This CPU 111
The ROM 112 and the RAM 113 are connected via a bus line such as a data bus. The ROM 112 is a read-only memory that stores various programs for searching for a route to a destination, traveling guidance on the route, determining a control section, and the like. RAM 113 is a CPU
Reference numeral 111 denotes a random access memory as a working memory for performing various arithmetic processing.

The data storage unit 12 stores a map data file, an intersection data file, a node data file, a road information file, a photograph data file, and information for each area such as a hotel, a gas station, and a tourist spot information in each area. It has other stored data files. Each of these files is searched for a route,
Display guide map along the searched route, display characteristic pictures and frame diagrams at intersections and routes, remaining distance to intersection and highway rampway, progress at next intersection and rampway Various data for displaying a direction and outputting other guidance information from the display unit 17 and the audio output unit 19 are stored.

Of the information stored in these files, those used for route search in normal navigation are the files storing intersection data, node data, and road information. These files include: road width, slope, road surface condition, radius of curvature at the corner, intersection, T-junction, number of lanes on the road, points where the number of lanes decreases, corner entry, railroad crossing, highway exit rampway It stores attributes of roads such as expressways, toll gates, narrow roads, downhill roads, uphill roads, speed limits, and other types of roads such as highways and general roads.

Each file is, for example, a floppy disk, hard disk, CD-ROM, DVD-ROM,
Various storage devices such as optical disks, magnetic tapes, IC cards, and optical cards are used. Each file has a large storage capacity, for example, it is preferable to use a CD-ROM. However, for individual data such as other data files and data for each area, an IC card may be used. The navigation processing unit 11 and the data storage unit 12 as a road information storage unit constitute a road information acquisition unit.

The current position detecting section 13 includes a GPS receiver 131, a geomagnetic sensor 132, a distance sensor 133, a steering sensor 134, a beacon sensor 135, and a gyro sensor 136. GPS receiver 13
Reference numeral 1 denotes a device that receives a radio wave emitted from an artificial satellite and measures the position of the own vehicle. The terrestrial magnetism sensor 132 detects terrestrial magnetism to determine the direction in which the vehicle is facing. As the distance sensor 133, for example, a sensor that detects and counts the number of rotations of a wheel, a sensor that detects acceleration and integrates twice, and other measuring devices are used. Steering sensor 134
For example, an optical rotation sensor or a rotation resistance volume attached to a rotating portion of a steering wheel is used, but an angle sensor attached to a wheel portion may be used. The beacon sensor 135 receives position information from a beacon arranged on the road. The gyro sensor 136 is configured by a gas rate gyro, a vibration gyro, or the like that detects the rotational angular velocity of the vehicle and integrates the angular velocity to determine the azimuth of the vehicle.

The GPS receiver 13 of the current position detector 13
1 and the beacon sensor 135 can independently measure the position, but in other cases, the distance sensor 133
, Or a combination of the azimuth detected by the geomagnetic sensor 132 and the gyro sensor 136, or the combination of the distance detected by the distance sensor 133 and the steering angle detected by the steering sensor 134. The absolute position (own vehicle position) is detected.

The communication unit 15 transmits and receives various data to and from an FM transmission device, a telephone line, and the like.
For example, various data such as road information such as traffic congestion and traffic accident information received from an information center or the like are received.

The input unit 16 is configured to correct the current position at the start of traveling and to input a destination. Examples of the configuration of the input unit 16 include a touch panel that is arranged on a screen of a display that configures the display unit 17 and that inputs information by touching keys and menus displayed on the screen, a keyboard, a mouse, and a bar. Examples include a code reader, a light-on, and a remote control device for remote operation.

The display unit 17 displays an operation guide, an operation menu, operation keys, a route to a guide point set in response to a request from the user, and various maps such as a guide map along a traveling route. Display is performed. As the display unit 17,
A CRT display, a liquid crystal display, a plasma display, a hologram device that projects a hologram on a windshield, or the like can be used.

The voice input unit 18 is constituted by a microphone or the like, and inputs necessary information by voice. The voice output unit 19 includes a voice synthesizer and a speaker, and outputs guidance information of voice synthesized by the voice synthesizer. Note that, in addition to the voice synthesized by the voice synthesizer, various kinds of guidance information may be recorded on a tape and output from a speaker, or the synthesized voice of the voice synthesizer and the voice of the tape may be output. They may be combined.

The navigation system device configured as described above informs the driver of road information around the current location of the vehicle and guides the traveling route to the destination of the vehicle. That is, when the destination is input from the input unit 16, the navigation processing unit 11 determines the travel route from the road information read from the data storage unit 12 to the destination based on the own vehicle position detected by the current position detection unit 13. The selected route is output to the display unit 17, and the driver is guided to the destination by the traveling route displayed on the display unit 17 and the voice output from the voice output unit 19. If the destination has not been input, road information around the own vehicle position is output to the display unit 17.

In the navigation system 10 as described above, the vehicle position detecting means is the current position detecting unit 1.
3 and the road information acquisition means is constituted by the data storage unit 12. Further, the connection path detecting means includes:
It is configured by a data storage unit 12 and a navigation processing unit 11, and acquires road information from the data storage unit 12,
The navigation processing unit 11 determines a road attribute from the road information and detects a connection road. Here, the ramp way is a connecting road for connecting roads having different road attributes (here, mainly road types).

The control section setting means comprises a current position detecting section 13, a data storage section 12, and a navigation processing section 11.

The control section in the traveling direction of the own vehicle position is determined by the navigation processing unit based on the own vehicle position detected by the current position detecting unit 13, the running direction of the own vehicle, and the road information obtained by the road information obtaining means. 11 is determined. As shown in FIG. 2, the control section is defined as a position Xm and a rear Ym on the main road of the high-speed traveling road from the position where the branch point P between the high-speed traveling road R1 and the rampway R2 is confirmed. When the driver decelerates from the main road on a high-speed road,
This is a deceleration section for smoothly entering the rampway R2, and at the same time, a section provided for following the error because there is an error between the position on the map and the actual position. ), And a section from the junction P to a road (general traveling road) with different attributes (for example, to a tollgate). The junction (intersection) is the starting point of the connection road when the vehicle moves from the main road to the general road, and conversely connects when the vehicle moves from the main road to the main road. The end point of the road.

Next, the scheduled road is a road which has been set by the function of the navigation system device 10 when the travel route of the vehicle has already been set, and when it has not been set. For example, a route that is expected to pass when the vehicle goes straight ahead can be used. In the case where such a traveling route detecting means for searching for the planned road is provided, the planned road becomes clearer and the controllability is improved.

The AT mode selection section 20 is an operation section for selecting a shift mode. The detection unit 30 includes a vehicle speed sensor 31 as vehicle speed detection means, a brake sensor 32, an accelerator opening sensor 33, and a blinker sensor 34 as driving operation detection means, and further has a throttle opening sensor 35. The vehicle speed sensor 31 indicates the vehicle speed V, the brake sensor 32 indicates ON / OFF of the brake, and the accelerator sensor 3
3 is the ON / OFF of the accelerator, the turn signal sensor 34
Indicates ON / OFF of the turn signal, and the throttle sensor detects the throttle opening θ.

The vehicle speed signal from the vehicle speed sensor 31, the accelerator ON / OFF signal from the accelerator sensor 33, the brake ON / OFF signal from the brake sensor 32, and the turn signal ON / OF from the turn signal sensor 34.
The F signal is supplied to the navigation processing unit 11 of the navigation system device 10.

Further, the navigation processing section 11 confirms the driver's intention to decelerate based on the accelerator opening signal, the brake ON / OFF signal, and the turn signal ON / OFF signal.

The navigation processing unit 11
Speed ratio limiting means is configured. That is, the shift control device 4
The range of the gear position that can be changed by 0 is determined by the navigation processing unit 11. In the present embodiment, control is performed to regulate the upper limit of the gear stage as the range of the gear stage to be regulated. In the present embodiment, such upper limit of the shift speed is set as follows.
The control is executed by setting the upper limit to the third speed.

The navigation processing unit 11 confirms the position of the vehicle 2 and, when the vehicle 2 enters the control section, the vehicle speed V and the deceleration operation such as the turning off of the accelerator are used to trigger the upper limit of the gear position. To determine. In this case, since it has been confirmed that the driver intends to decelerate from the accelerator OFF operation, the brake ON operation, and the like, even if the downshift is performed by the upper limit value of the gear position,
The driver does not feel much discomfort. It should be noted that the upper limit of the shift speed may be regulated after further confirming that the turn signal is ON.

The automatic transmission is composed of an automatic transmission (a multi-stage transmission having a fourth speed in this embodiment) 41 and an actuator for setting the gear ratio (in this embodiment, a hydraulic pressure for setting the fourth speed). (A control circuit) 42 and a shift control device 40 for outputting an operation signal to the actuator. The shift control device 40 is supplied with a vehicle speed signal from the vehicle speed sensor 31 and a throttle opening signal from the throttle sensor 35.

Transmission control device 4 constituting transmission ratio setting means
0 specifically determines which shift speed is to be selected, and is determined, for example, by a data table (shift map) that determines the shift speed based on the supplied throttle opening and vehicle speed. This shift stage map is provided with shift modes such as a normal mode, a power mode, and a slope mode, and is switched by a driver's intention or by control according to road conditions. Here, the normal mode is
This is an economical driving pattern that balances fuel efficiency and power performance, and is used for normal driving. What is power mode?
This is a pattern emphasizing power performance and is used for driving in mountainous areas or the like. In the shift speed map, a large range of the shift speed on the low speed side is taken.

Further, when the speed control signal is input from the navigation processing unit 11, the control of the speed within the restricted range is performed. For example, even if the fourth speed is determined by the transmission control device 40, the navigation processing unit 1
When the upper limit is set to the third speed by the restriction signal from 1, the command signal supplied to the actuator 42 is output only within the range from the first speed to the third speed. Then, a command signal determined within the above range is output to the actuator 42 for setting the gear ratio. That is, when the vehicle is traveling in the fourth speed, when a regulation signal for setting the upper limit to the third speed is supplied to the shift control device 40, the downshift is performed from the fourth speed to the third speed, and the engine brake is applied to the ramp way. Deceleration is assisted.

Hereinafter, the navigation processing unit 11 and the shift control unit 4 when passing through the rampway of the highway
The control operation of the shift stage of 0 will be described based on the flowcharts shown in FIGS.

The own vehicle position is obtained from the current position detecting unit 13, and based on the own vehicle position, road information on the traveling direction of the vehicle is obtained from the data storage unit 12 (step S10).
The road information includes a road type, a position of a junction between an expressway and a rampway, and the like. Next, vehicle information is acquired (step S30). The vehicle information includes a vehicle speed supplied from the vehicle speed sensor 31, an accelerator ON / OFF signal supplied from the accelerator sensor 33, a brake ON / OFF signal supplied from the brake sensor 32, and the like. Then, the ramp way control routine (step S
50), and supplies the command determined in the rampway control routine to the shift control device 40 (step S7).
0).

Next, the ramp way control routine will be described with reference to the flowchart shown in FIG. From the position of the vehicle obtained in step S10, the position of the branch point of the rampway, the type of road, and the like, the rampway as shown in FIG. 2 is confirmed, and the ramp entrance (branch point P) is determined from the vehicle position. ) Is calculated (step S501). The control section is, for example, a section suitable for deceleration for traveling on a general road in the case of a rampway connecting a highway and a general road.

It is determined whether or not the vehicle has entered the set control section from the own vehicle position (step S503). When the vehicle is not within the control section (step S503: N), that is, when the vehicle does not enter the control section or when the vehicle passes the control section, control for not performing the rampway control is performed. That is, the upper limit command value is set to the fourth speed (step S5).
11).

If the vehicle has entered the control section (step S503: Y), it is determined whether or not the current vehicle speed V is within the required control vehicle speed range V1 ≦ V ≦ V2 (step S503).
505). Here, the vehicle speed V1 is a vehicle speed that is so low that ramp control is not required, and V2 is a vehicle speed that does not cause a change in behavior of the vehicle even if a downshift occurs as a result, or a vehicle speed that does not cause discomfort to the driver can do.

The vehicle speed is used to detect the driver's intention to enter the ramp way. For example, if the vehicle speed is, for example, V2 or higher even in the control section (step S505: N), the vehicle speed is detected. It is determined that the vehicle does not enter, and the process proceeds to step S511, where the upper limit command value for not performing the rampway control is set to the fourth speed. If the vehicle speed is within the control required vehicle speed (step S505: Y), it is determined that deceleration for entering the ramp is necessary, and the presence or absence of the driver's deceleration operation is detected (steps S507 and S509).

First, it is determined whether or not the accelerator is off from the vehicle information acquired in step S30 (step S507). If not turned off (step S
507: N), it is determined that there is no intention of deceleration, an upper limit command value for the fourth speed is set, and the routine returns.

If the switch is turned off (step S507:
Y) Further confirm the brake operation. Here, the reason for further confirming the brake operation and not setting the upper limit value only with the accelerator off is that there is a case where the accelerator is turned off and the vehicle runs by inertia while driving on the highway, so that a more reliable deceleration will be determined. is there.

From the vehicle information obtained in step S30,
It is determined whether the brake is turned on (step S
509). If the brake is turned on (step S5
09: Y), it is determined that there is a high possibility that the vehicle will enter the rampway, and the upper limit command value of the gear position is set to the third speed (step S).
513) Return.

On the other hand, when the brake is not turned on (step S509: N), the upper limit value previously instructed is set (step S515) and the routine returns. Thus, when the brake is not turned on, the upper limit commanded last time is set because the brake is turned on once and the upper limit is set to the third speed, and then the upper limit is set to the third speed even if the brake is turned off. In order to maintain the rampway control.

When the accelerator is depressed again (S507: N), when the vehicle speed exceeds the control vehicle speed range (S50).
5: N), if the control section has been exceeded (S503: N), an upper limit fourth speed command is set in step S511 to indicate that the lamp control is to be canceled. In addition, in order to confirm the approach to the ramp way, it is also possible to additionally control the upper limit to the third speed when the turn signal is turned on.

Next, the control operation of the transmission control device 40 will be described with reference to FIG. The gear position is determined based on the gear position map from the vehicle speed V and the throttle opening acquired in step S30 (step S201). Next, the upper limit command value of the gear position is input from the navigation processing unit 11 (step S203). Step S is performed so that the gear position instruction signal transmitted to the actuator does not become larger than the upper limit value input from the navigation processing unit 11.
The gear position determined in S201 is compared with the input upper limit value, and the lower gear is selected as the gear position indicating the smaller one (step S205). Then, a shift signal is output to the actuator in order to set the shift speed selected in step 205.

In the control operation as described above, all the control operations may be performed by either the transmission control unit 40 or the navigation processing unit 11, and furthermore, the transmission control unit 40 and the navigation processing unit 11 May be configured to take part of the control.

The shift control device 40 determines the shift speed based on the throttle opening and the vehicle speed, may determine the shift speed based on the accelerator opening and the vehicle speed, or determines the shift speed based on the magnitude of the engine torque and the vehicle speed. It is good also as a structure which performs.

In the above embodiment, the upper limit of the gear position is always set to the third speed. However, a separate gear position restriction map is set.
The upper limit of the gear position may be determined based on the regulation map. This shift stage restriction map can determine, for example, the upper limit of the shift stage according to the vehicle speed. In addition, the map of the map is determined based on factors such as road gradient, vehicle type, vehicle weight, and curvature of the rampway. The content may be changed. Further, for the regulation of the shift speed, a changeable range may be set (that is, the lower limit and the upper limit of the shift speed may be regulated), or the lower limit of the shift speed may be regulated.

The automatic transmission may be one having a continuously variable transmission. In this case, the transmission ratio regulating means is
The range of the gear ratio is regulated instead of the gear.

[0053]

As described above, according to the vehicle control device of the present invention, the gear ratio is determined based on the driver's operation in the control section on the connecting roads of roads having different attributes that are likely to change the vehicle speed. , The shift can be accurately performed based on the driver's intention.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a vehicle control device of the present invention.

FIG. 2 is a road map showing a branch point of a rampway.

FIG. 3 is a flowchart illustrating a control operation of a navigation processing unit.

FIG. 4 is a flowchart illustrating a control operation of a navigation processing unit.

FIG. 5 is a flowchart showing a control operation of the shift control device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 vehicle control device 2 vehicle 10 navigation system device 11 navigation processing unit 12 data storage unit 13 current position detection unit 20 AT mode selection unit 30 running state detection unit 40 transmission control device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI F16H 59:54 59:58 59:66

Claims (7)

[Claims] 1. Road information storage means for storing road information; own vehicle position detection means for detecting the position of an own vehicle on a road; vehicle speed detection means for detecting a vehicle speed; Connection path detecting means for detecting a connection path connecting different roads; control section setting means for setting a control section based on the position of the vehicle and the detected connection path; and an automatic transmission device for automatically selecting a gear ratio. A gear ratio restricting means for determining a range in which a gear ratio can be changed from a vehicle speed in the control section; a driving operation detecting means for detecting a driving operation of a driver; and a gear ratio selected by the automatic transmission. A speed ratio setting means for setting the speed ratio to be within a determined range based on a predetermined driving operation. 2. The vehicle control device according to claim 1, wherein the driving operation detected by the driving operation detecting means is one or more of an accelerator operation, a brake operation, and a turn signal lighting. 3. The speed ratio setting means, when the vehicle speed is within a predetermined range and an accelerator off operation and a brake on operation are detected, sets the speed ratio within the determined upper limit range. The vehicle control device according to claim 2, wherein the vehicle control device is set to: 4. The vehicle control device according to claim 1, wherein the automatic transmission is a multi-stage transmission. 5. The vehicle control device according to claim 1, wherein the automatic transmission is a continuously variable transmission. 6. The vehicle control device according to claim 1, wherein the connection road detecting means detects a connection road between a main road on a high speed road and a general road. 7. The vehicle control device according to claim 1, wherein the control section setting unit sets the control section based on a start point or an end point of a connection road.