WO2016103419A1

WO2016103419A1 - Transmission control device and transmission control method

Info

Publication number: WO2016103419A1
Application number: PCT/JP2014/084390
Authority: WO
Inventors: 邦寛金子
Original assignee: ボルボトラックコーポレーション; 邦寛金子
Priority date: 2014-12-25
Filing date: 2014-12-25
Publication date: 2016-06-30
Also published as: JPWO2016103419A1; JP6586428B2

Abstract

A transmission control unit that electronically controls a transmission in accordance with the travel state of a vehicle recognizes, on the basis of vehicle information and map information, a prescribed section in which an uphill road, flat road, downhill road, and flat road are continuous and that is present in the path of a vehicle comprising a cruise control function. In addition, the transmission control unit shifts the transmission into neutral when the vehicle transitions from an uphill road to a flat road. The transmission control unit may shift the transmission into neutral when the vehicle transitions from a flat road to a downhill road or transitions from a downhill road to a flat road.

Description

Transmission control device and transmission control method

The present invention relates to a transmission control device and a transmission control method.

In vehicles equipped with an automatic transmission, in order to improve fuel consumption (fuel consumption rate), as described in Japanese Patent Application Laid-Open No. 2014-1824 (Patent Document 1), the downshift is limited near the top of an uphill road. Techniques to do this have been proposed. And in this technique, near the top of an uphill road, it suppresses that a rotational speed of an engine rises temporarily, and improves a fuel consumption.

JP 2014-1824 A

However, in order to improve fuel efficiency, not only the downshift is limited near the top of the uphill road, but, for example, the automatic transmission is shifted to neutral and travels with inertia under conditions that do not hinder vehicle travel. It is also possible.

Therefore, an object of the present invention is to provide a transmission control device and a transmission control method that can further improve fuel consumption.

The transmission control device recognizes a predetermined section in which an uphill road, a flat road, a downhill road, and a flat road exist on the course of a vehicle having an auto-cruise function based on the vehicle position and map information. Then, the transmission control device shifts the transmission to neutral when the vehicle shifts from the uphill road to the flat road.

According to the present invention, since the number of scenes where the vehicle travels with inertia increases, fuel consumption can be improved.

It is a schematic diagram showing an example of a transmission mounted on a vehicle. It is a block diagram which shows an example of a transmission control unit. It is explanatory drawing which shows the outline | summary of transmission control. It is a flowchart of a main routine showing an example of shift control. It is a flowchart of a main routine showing an example of shift control. It is a flowchart of a main routine showing an example of shift control. It is a flowchart of a subroutine showing an example of shift control.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows an example of a transmission mounted on a vehicle.

A synchronous mesh transmission 300 is attached to the output shaft of the diesel engine 100 via a friction clutch 200. The clutch 200 transmits or blocks the rotational driving force of the diesel engine 100 by connecting and disconnecting a disk-like friction engagement element. The transmission 300 is, for example, a 12-speed transmission that combines a 6-speed main transmission and a 2-speed sub-transmission. The output shaft of the transmission 300 is connected to a rear wheel, which is a drive wheel, via a propeller shaft and a differential carrier (not shown).

The diesel engine 100 is provided with a fuel injection device 120 that injects fuel into the combustion chamber, a rotation speed sensor 140 that detects the engine rotation speed, and a crank angle sensor 160 that detects the crank angle. As the fuel injection device 120, for example, a common rail fuel injection device can be used. The accelerator pedal 400 in the driver's cab is attached with an accelerator opening sensor 420 composed of, for example, a potentiometer that detects an accelerator opening that is an example of an engine load.

The output signals of the rotation speed sensor 140, the crank angle sensor 160, and the accelerator opening sensor 420 are respectively input to the engine control unit 500 having a built-in microcomputer. The engine control unit 500 executes an engine control program stored in a nonvolatile memory such as a flash ROM (Read Only Memory), for example, so that the fuel injection device 120 is based on the engine rotation speed, the crank angle, and the accelerator opening. The electronic control. Specifically, the engine control unit 500 refers to, for example, a fuel injection map, and determines the fuel injection amount and fuel injection timing according to the engine speed and the accelerator opening. The engine control unit 500 outputs an operation signal corresponding to the fuel injection amount to the fuel injection device 120 when the crank angle reaches the fuel injection timing. Thus, the engine control unit 500 electronically controls the diesel engine 100 according to the driving state of the vehicle.

The clutch 200 is attached with a clutch actuator 220 made of, for example, an air cylinder, which connects and disconnects the friction engagement element using compressed air supplied from the air reservoir 600 as a working fluid. The first pipe 620 connecting the air reservoir 600 and the clutch actuator 220 includes a remote-controllable electromagnetic type that opens and closes the fluid passage in the first pipe 620 in multiple stages or continuously from fully closed to fully opened. The control valve 240 is arranged. In addition, a clutch stroke sensor 260 that detects the stroke amount of the clutch actuator 220 is attached to the clutch 200. The working fluid is not limited to compressed air, and for example, oil adjusted to a predetermined pressure can be used (the same applies hereinafter).

The transmission 300 is equipped with a gear shift unit 320 that performs a shifting operation using compressed air supplied from the air reservoir 600 as a working fluid. Compressed air is supplied from the air reservoir 600 to the gear shift unit 320 via the second pipe 640 branched from the first pipe 620 on the upstream side of the control valve 240. The gear shift unit 320 includes a plurality of actuators that perform a shift of the transmission 300, a remotely controllable control valve that controls the supply of compressed air to each actuator, and a switch that detects the shift state of the transmission 300. Has been. The transmission 300 is also provided with a vehicle speed sensor 340 that detects the vehicle speed from the rotation speed of the output shaft, and a rotation speed sensor 360 that detects the rotation speed of the counter shaft. Furthermore, a shift tower 440 is mounted at a predetermined location in the driver's cab where a driver of the vehicle performs a speed change operation. The shift tower 440 outputs a signal indicating forward, reverse, neutral, hold, etc., for example, according to the operation of the driver.

The output signals of the clutch stroke sensor 260, the gear shift unit 320, the vehicle speed sensor 340, the rotational speed sensor 360, and the shift tower 440 are input to a transmission control unit 520 having a built-in microcomputer. As shown in FIG. 2, the transmission control unit 520 includes a processor A such as a CPU (Central Processing Unit), a nonvolatile memory B such as a flash ROM, a volatile memory C such as a RAM (Random Access Memory), and various sensors. And an input circuit D for inputting the output signal of the switch, a drive circuit E for driving the control valve 240 and the gear shift unit 320, and a bus F for connecting them together.

The transmission control unit 520 can communicate with the engine control unit 500, the navigation system 520, the auto cruise control unit 540, and the brake control unit 580 via an in-vehicle network 460 such as a CAN (Controller Area Network). It is connected to the. Here, the navigation system 540 can measure a vehicle position by a GPS (Global Positioning System) function, and can output the vehicle position to the outside. The auto-cruise control unit 560 provides an auto-cruise function that maintains a constant vehicle speed (set vehicle speed) that is set without continuing to step on the accelerator pedal 400, for example, by operating a button or lever attached near the steering wheel. To do. The brake control unit 580 operates at least one of known brakes such as a service brake, an exhaust brake, and a retarder in response to an operation signal from the outside, for example. Therefore, the transmission control unit 520 can read the output signals of the rotation speed sensor 140 and the accelerator opening sensor 420 via the engine control unit 500.

The processor A of the transmission control unit 520 electronically controls the clutch 200 and the transmission 300 in accordance with output signals of various sensors and switches by executing a transmission control program stored in the nonvolatile memory B. An automatic shift that automatically shifts according to the driving state of the vehicle is realized.

When the auto-cruise function is not activated, the processor A of the transmission control unit 520 refers to, for example, a shift control map and determines a target shift state according to the vehicle speed and the accelerator opening. The processor A of the transmission control unit 520 determines whether or not a shift is necessary through a comparison between the output signal of the gear shift unit 320 and the target shift state. An operation signal is output to 240 and the clutch 200 is disconnected. Next, the processor A of the transmission control unit 520 outputs an operation signal corresponding to the target shift state to the gear shift unit 320 to execute the shift, and then monitors the clutch stroke, the engine rotation speed, and the counter shaft rotation speed. Then, an operation signal is output to the control valve 240 to connect the clutch 200. At this time, the processor A of the transmission control unit 520 puts the clutch 200 in a half-clutch state according to the clutch stroke, and grasps the completion of synchronization (shift completion) of the transmission 300 according to the engine rotation speed and the counter shaft rotation speed. Therefore, the gear shift with less shock is performed.

On the other hand, when the auto-cruise function is operating, the processor A of the transmission control unit 520, based on the vehicle position and the map information, as shown in FIG. Recognizing a predetermined section where a downhill road and a flat road continue. Then, the processor A of the transmission control unit 520 executes the following shift control according to the vehicle position information.

[Driving uphill]
The processor A of the transmission control unit 520 is directed toward the engine control unit 500 in order to suppress a downshift that leads to a reduction in fuel consumption when the vehicle is within a predetermined distance from the uphill road to the shoulder that transitions from a flat road. A command to increase the vehicle speed by a predetermined vehicle speed (for example, 5 km / h) is output. Further, the processor A of the transmission control unit 520 prohibits a shift-up in order to suppress a decrease in engine rotation speed when the vehicle is traveling on the shoulder.

[Driving on a flat road]
The processor A of the transmission control unit 520 shifts the transmission 300 to a neutral position and makes the vehicle travel with inertia when the vehicle shifts from an uphill road to a flat road to improve fuel efficiency. Then, the processor A of the transmission control unit 520 automatically operates the transmission 300 according to the traveling state of the vehicle when the vehicle speed decreases by a predetermined speed (for example, 5 km / h) while the vehicle is traveling on a flat road in neutral. Return to normal control to shift.

[Running downhill]
The processor A of the transmission control unit 520 shifts the transmission 300 to the neutral position and moves the vehicle with inertia when the vehicle shifts from a flat road to a downhill road in order to improve fuel efficiency. Then, the processor A of the transmission control unit 520 applies a brake to the brake control unit 580 to ensure the safety of the vehicle when the vehicle speed reaches a predetermined value while the vehicle is traveling on the downhill road in the neutral. Is returned to normal control for automatically shifting the transmission 300 in accordance with the running state of the vehicle in order to suppress overheating of the brake and the like. Here, the predetermined value may be set vehicle speed, for example. Further, the brake operation command can be a braking force corresponding to a deviation between the vehicle speed and a predetermined value. Note that the processor A of the transmission control unit 520 may release the brake operation and shift the transmission 300 to neutral when the vehicle speed is reduced to some extent by the brake operation.

[Driving on a flat road]
The processor A of the transmission control unit 520 shifts the transmission 300 to the neutral position and makes the vehicle travel with inertia when the vehicle shifts from a downhill road to a flat road to improve fuel efficiency. Then, the processor A of the transmission control unit 520 allows the vehicle control unit 520 to end the shift control of the predetermined section when the vehicle speed decreases by a predetermined speed (for example, 5 km / h) while the vehicle is traveling on the flat road in the neutral. The normal control for automatically shifting the transmission 300 according to the running state is restored.

Next, an example of automatic transmission control of the transmission 300 that is repeatedly executed by the processor A of the transmission control unit 520 when the transmission control unit 520 is activated will be described with reference to FIGS. To do.

In step 1 (abbreviated as “S1” in the figure, the same applies hereinafter), whether the processor A of the transmission control unit 520 is operating the auto-cruise function based on the operating state of the auto-cruise control unit 560, for example. Determine whether or not. If the processor A of the transmission control unit 520 determines that the auto-cruise function is in operation (Yes), the process proceeds to step 2. On the other hand, if the processor A of the transmission control unit 520 determines that the auto-cruise function is not operating (No), the process proceeds to step 29.

In step 2, the processor A of the transmission control unit 520 reads the vehicle position measured by the GPS from the navigation system 540.

In step 3, the processor A of the transmission control unit 520 determines whether there is a predetermined section in which the uphill road, the flat road, the downhill road, and the flat road continue on the course of the vehicle based on the vehicle position and the map information. Determine. That is, the processor A of the transmission control unit 520 estimates, for example, the course of the vehicle based on a change in the vehicle position and pre-reads the map information to determine whether a predetermined section exists on the course of the vehicle. judge. If the processor A of the transmission control unit 520 determines that a predetermined section exists on the course of the vehicle (Yes), the process proceeds to step 4. On the other hand, if the processor A of the transmission control unit 520 determines that the predetermined section does not exist on the course of the vehicle (No), the process proceeds to step 29. The map information can be stored in the non-volatile memory B of the transmission control unit 520, but can also be read from the navigation system 540.

In step 4, the processor A of the transmission control unit 520 determines whether or not the vehicle has shifted to the uphill road, for example, through matching between the vehicle position and the map information. It is determined whether or not the transition has been made. If the processor A of the transmission control unit 520 determines that the vehicle has shifted to the uphill road (Yes), the process proceeds to step 5. On the other hand, if the processor A of the transmission control unit 520 determines that the vehicle does not shift to the uphill road (No), the process proceeds to step 29.

In step 5, the processor A of the transmission control unit 520 reads the vehicle position measured by the GPS from the navigation system 540.

In step 6, whether or not the processor A of the transmission control unit 520 is within a predetermined distance to the shoulder, for example, through matching between the vehicle position and the map information, that is, the vehicle is below the predetermined distance to the shoulder. It is determined whether or not the vehicle is traveling on an uphill road. If the processor A of the transmission control unit 520 determines that the predetermined distance has been reached to the shoulder (Yes), the process proceeds to step 7 (Yes). On the other hand, if the processor A of the transmission control unit 520 determines that the shoulder portion is not within the predetermined distance (No), the process returns to step 5.

In step 7, the processor A of the transmission control unit 520 transmits a command for increasing the vehicle speed to the engine control unit 500 by a predetermined vehicle speed. In response to the vehicle speed increase command, the engine control unit 500 increases the fuel injection amount of the fuel injection device 120 to increase the vehicle speed, for example.

In step 8, the processor A of the transmission control unit 520 reads the vehicle position measured by the GPS from the navigation system 540.

In step 9, the processor A of the transmission control unit 520 gradually reduces the shoulder where the vehicle moves from the uphill road to the flat road, that is, the road surface inclination, through the matching of the vehicle position and the map information, for example. It is determined whether or not the part has been transferred. If the processor A of the transmission control unit 520 determines that the vehicle has shifted to the shoulder (Yes), the process proceeds to step 10. On the other hand, if the processor A of the transmission control unit 520 determines that the vehicle does not shift to the shoulder (No), the process returns to step 7.

In step 10, the processor A of the transmission control unit 520 prohibits the shift-up of the transmission 300 by, for example, temporarily setting a shift-up permission flag that permits the shift-up of the transmission 300 to FALSE. . Note that by setting the upshift permission flag to FALSE, the upshift of transmission 300 is prohibited in normal control described later.

In step 11, the processor A of the transmission control unit 520 reads the vehicle position measured by the GPS from the navigation system 540.

In step 12, the processor A of the transmission control unit 520 determines whether or not the vehicle has shifted from the uphill road to the flat road, for example, through the uphill road, through matching between the vehicle position and the map information. judge. If the processor A of the transmission control unit 520 determines that the vehicle has shifted from the uphill road to the flat road (Yes), the process proceeds to Step 13 (Yes). On the other hand, if the processor A of the transmission control unit 520 determines that the vehicle does not shift from the uphill road to the flat road (No), the process returns to step 10.

In step 13, the processor A of the transmission control unit 520 outputs a shift signal to the gear shift unit 320 of the transmission 300 to shift the transmission 300 to neutral. When the transmission 300 is shifted to neutral, the diesel engine 100 is in an idling state, and fuel efficiency can be improved (the same applies hereinafter). Note that when shifting the transmission 300 to neutral, control is performed to disconnect the clutch 200, shift the transmission 300, and then connect the clutch 200. For simplicity of explanation, connection / disconnection control of the clutch 200 is performed. Is omitted (the same applies hereinafter).

In step 14, the processor A of the transmission control unit 520 reads the vehicle speed from the vehicle speed sensor 340.

In step 15, the processor A of the transmission control unit 520 determines whether or not the vehicle speed has decreased, that is, whether or not the vehicle speed has decreased by a predetermined speed. If the processor A of the transmission control unit 520 determines that the vehicle speed has decreased (Yes), the process proceeds to step 16. On the other hand, if the processor A of the transmission control unit 520 determines that the vehicle speed has not decreased (No), the process proceeds to step 17.

In step 16, the processor A of the transmission control unit 520 executes a subroutine for automatically shifting the transmission 300 according to the traveling state of the vehicle.

In step 17, the processor A of the transmission control unit 520 reads the vehicle position measured by the GPS from the navigation system 540.

In step 18, the processor A of the transmission control unit 520 determines whether or not the vehicle has shifted from a flat road to a downhill road, for example, through matching between the vehicle position and map information. If the processor A of the transmission control unit 520 determines that the vehicle has shifted from a flat road to a downhill road (Yes), the process proceeds to step 19. On the other hand, if the processor A of the transmission control unit 520 determines that the vehicle has not shifted from the flat road to the downhill road (No), the process returns to step 14.

In step 19, the processor A of the transmission control unit 520 outputs a shift signal to the gear shift unit 320 of the transmission 300 to shift the transmission 300 to neutral.

In step 20, the processor A of the transmission control unit 520 reads the vehicle speed from the vehicle speed sensor 340.

In step 21, the processor A of the transmission control unit 520 determines whether or not the vehicle speed has reached a predetermined value. If the processor A of the transmission control unit 520 determines that the vehicle speed has reached a predetermined value (Yes), the process proceeds to step 22. On the other hand, if the processor A of the transmission control unit 520 determines that the vehicle speed does not reach the predetermined value (No), the process proceeds to step 24.

In step 22, the processor A of the transmission control unit 520 outputs a command for operating the brake to the brake control unit 580. Then, in response to the brake operation command, the brake control unit 580 operates, for example, at least one of a service brake, an exhaust brake, a retarder, and the like to reduce the vehicle speed of the vehicle traveling on the downhill portion.

In step 23, the processor A of the transmission control unit 520 executes a subroutine for automatically shifting the transmission 300 in accordance with the traveling state of the vehicle.

In step 24, the processor A of the transmission control unit 520 reads the vehicle position measured by the GPS from the navigation system 540.

In step 25, the processor A of the transmission control unit 520 determines whether or not the vehicle has shifted from a downhill road to a flat road through matching between the vehicle position and map information, for example. If the processor A of the transmission control unit 520 determines that the vehicle has shifted from a downhill road to a flat road (Yes), the process proceeds to step 26. On the other hand, if the processor A of the transmission control unit 520 determines that the vehicle does not shift from the downhill road to the flat road (No), the process returns to step 20.

In step 26, the processor A of the transmission control unit 520 outputs a shift signal to the gear shift unit 320 of the transmission 300 to shift the transmission 300 to neutral.

In step 27, the processor A of the transmission control unit 520 reads the vehicle speed from the vehicle speed sensor 340.

In step 28, the processor A of the transmission control unit 520 determines whether or not the vehicle speed has decreased, that is, whether or not the vehicle speed has decreased by a predetermined speed. If the processor A of the transmission control unit 520 determines that the vehicle speed has decreased (Yes), the process proceeds to step 29. On the other hand, if the processor A of the transmission control unit 520 determines that the vehicle speed has not decreased (No), the process returns to step 27.

In step 29, the processor A of the transmission control unit 520 executes a subroutine for automatically shifting the transmission 300 according to the traveling state of the vehicle.

FIG. 7 shows an example of a subroutine for automatically shifting the transmission 300 according to the traveling state of the vehicle.

In step 31, the processor A of the transmission control unit 520 reads the vehicle speed from the vehicle speed sensor 340 and also reads the accelerator opening from the accelerator opening sensor 420 via the engine control unit 500.

In step 32, the processor A of the transmission control unit 520 refers to, for example, a shift control map and determines a target shift state according to the vehicle speed and the accelerator opening. Here, the target shift state means a shift stage that can be shifted by automatic shift control, such as 1st to 12th speed, for example.

In step 33, the processor A of the transmission control unit 520 shifts the transmission 300 by determining whether or not the shift state specified by the output signal of the gear shift unit 320 is the same as the target shift state. Determine whether it is necessary. If the processor A of the transmission control unit 520 determines that the transmission 300 needs to be shifted (Yes), the process proceeds to step 34. On the other hand, if the processor A of the transmission control unit 520 determines that there is no need to shift the transmission 300 (No), the processing is terminated.

In step 34, the processor A of the transmission control unit 520 compares the shift state specified by the output signal of the gear shift unit 320 with the target shift state to determine whether or not the shift of the transmission 300 is upshifted. Determine. If the processor A of the transmission control unit 520 determines that the shift of the transmission 300 is upshift (Yes), the process proceeds to step 35. On the other hand, if the processor A of the transmission control unit 520 determines that the shift of the transmission 300 is not shifted up, that is, shifted down (No), the process proceeds to step 36.

In step 35, the processor A of the transmission control unit 520 determines whether or not the shift-up of the transmission 300 is permitted, for example, by determining whether or not the shift-up permission flag is TRUE. If the processor A of the transmission control unit 520 determines that the upshift is permitted (Yes), the process proceeds to step 36. On the other hand, if the processor A of the transmission control unit 520 determines that the upshift is not permitted (No), the processor A ends the processing.

In step 36, the processor A of the transmission control unit 520 outputs an operation signal to the control valve 240 and disengages the clutch 200.

In step 37, the processor A of the transmission control unit 520 outputs an operation signal corresponding to the target shift state to the gear shift unit 320, and shifts the transmission 300 to the target shift state.

In step 38, the processor A of the transmission control unit 520 outputs an operation signal to the control valve 240 to connect the clutch 200.

In this way, when the vehicle is traveling on the uphill road and the distance to the shoulder is less than or equal to the predetermined distance, the vehicle speed is increased. For this reason, it is possible to suppress the transmission 300 from being shifted down as the vehicle speed decreases, and it is possible to suppress a decrease in fuel consumption due to an increase in engine rotation speed. And if a vehicle transfers to a shoulder part, since the upshift of the transmission 300 is prohibited, a fuel consumption improvement can be aimed at through the fluctuation | variation suppression of an engine speed.

When the vehicle moves from the uphill road to the flat road, the transmission 300 is shifted to neutral, so that the fuel consumed by the diesel engine 100 is reduced and the fuel consumption can be improved. When the vehicle speed decreases, the transmission 300 returns to the normal shift control (normal control), and therefore, for example, smooth running of the following vehicle is not hindered.

When the vehicle shifts from a flat road to a downhill road, the transmission 300 is shifted to neutral, so that the fuel consumed by the diesel engine 100 is reduced and the fuel consumption can be improved. When the vehicle speed increases, the brake is activated and the transmission 300 returns to the normal shift control, so that, for example, the safety of vehicle travel can be ensured.

When the vehicle shifts from the downhill road to the flat road, the transmission 300 is shifted to neutral, so that the fuel consumed by the diesel engine 100 is reduced, and the fuel efficiency can be improved. When the vehicle speed decreases, the transmission 300 returns to the normal shift control, so that, for example, smooth running of the following vehicle is not hindered.

Therefore, in various scenes, the transmission 300 is shifted to neutral, and the fuel consumption of the diesel engine 100 is reduced, so that fuel efficiency can be improved.

The predetermined section existing on the course of the vehicle is not limited to prefetching the map information but can be recognized as follows. That is, the map information holds information that can specify a predetermined section with respect to the vehicle position. Then, the processor A of the transmission control unit 520 determines whether or not the traveling road corresponds to the predetermined section based on the coordinate value specified from the vehicle position, for example, while the vehicle is traveling. If the processor A of the transmission control unit 520 determines that the traveling road corresponds to the predetermined section, the processor A updates (learns) information that can identify the predetermined section.

In this way, the processor A of the transmission control unit 520 can recognize a predetermined section existing on the course of the vehicle by referring to the information included in the map information, so that the processing load can be reduced. .

The vehicle engine is not limited to the diesel engine 100 but may be a gasoline engine using gasoline as fuel. In this case, the engine control unit 500 may control, for example, an electronically controlled throttle valve disposed in the intake passage in response to a command to increase the vehicle speed.

DESCRIPTION OF SYMBOLS 100 Diesel engine 300 Transmission 340 Vehicle speed sensor 500 Engine control unit 520 Transmission control unit 540 Navigation system 560 Auto cruise control unit 580 Brake control unit

Claims

Based on the vehicle position and map information, recognize the predetermined section where the uphill road, the flat road, the downhill road and the flat road exist on the course of the vehicle having the auto-cruise function,
When the vehicle moves from the uphill road to the flat road, the transmission is shifted to neutral.
A control apparatus for a transmission.
When the vehicle is traveling on a shoulder that transitions from the uphill road to the flat road, a shift up of the transmission is prohibited.
The transmission control device according to claim 1.
When the vehicle is traveling on the uphill road that is a predetermined distance or less to the shoulder, a vehicle speed increase command is transmitted to an engine control unit that electronically controls the engine.
The transmission control device according to claim 2.
When the vehicle speed decreases while the vehicle is traveling on the flat road in neutral, the normal control for shifting the transmission according to the traveling state of the vehicle is restored.
The transmission control device according to any one of claims 1 to 3, wherein
When the vehicle moves from the flat road to the downhill road, the transmission is shifted to neutral.
The transmission control device according to any one of claims 1 to 4, wherein
When the vehicle speed reaches a predetermined value while the vehicle travels neutrally on the downhill road, a brake operation command is transmitted to a brake control unit that electronically controls a brake.
6. The transmission control apparatus according to claim 5, wherein
When the vehicle speed reaches a predetermined value while the vehicle is traveling downhill on the downhill road, the vehicle returns to normal control for shifting the transmission according to the traveling state of the vehicle.
The transmission control device according to claim 5 or 6, characterized in that
When the vehicle moves from the downhill road to the flat road, the transmission is shifted to neutral.
The transmission control apparatus according to any one of claims 1 to 7, wherein the transmission control apparatus includes:
When the vehicle speed decreases while the vehicle is traveling on the flat road in neutral, the normal control for shifting the transmission according to the traveling state of the vehicle is restored.
The transmission control device according to claim 8.
The map information holds information that can identify the predetermined section in association with a vehicle position,
Recognizing the predetermined section by matching the vehicle position and the information;
The transmission control apparatus according to any one of claims 1 to 9, wherein
Learning the information from the coordinate values of the road on which the vehicle has traveled;
The transmission control device according to claim 10.
Pre-reading the map information based on the change in the vehicle position and recognizing the predetermined section;
The transmission control apparatus according to any one of claims 1 to 9, wherein
A transmission control unit that electronically controls the transmission according to the running state of the vehicle,
Based on the vehicle position and map information, recognize the predetermined section where the uphill road, the flat road, the downhill road and the flat road exist on the course of the vehicle having the auto-cruise function,
When the vehicle moves from the uphill road to the flat road, the transmission is shifted to neutral.
A control method for a transmission.
The transmission control unit is
When the vehicle moves from the flat road to the downhill road, the transmission is shifted to neutral.
The transmission control method according to claim 13.
The transmission control unit is
When the vehicle moves from the downhill road to the flat road, the transmission is shifted to neutral.
15. The transmission control method according to claim 13, wherein the transmission is controlled.