JP2012041982A - Shift control device of automatic transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To match a shift stage instruction operation with an actual shift operation by displaying a correct shift stage instruction operation, in a shift control device of an automatic transmission with a manual mode (manually operable mode) and a shift stage instruction (display) function.SOLUTION: The shift control device (1) calculates a final target gear stage based on a selectable gear group and a gear stage or a gear stage group optimum for improvement in fuel economy and compares the final target gear stage with a present gear stage to instruct a display device (4) to display an urging manual operation for switching the gear stage.

Description

  The present invention relates to a shift control device for an automatic transmission, and more particularly to a shift control device for an automatic transmission with a manual mode (manually operable mode) and having a gear position instruction (display) function.

A vehicle equipped with an automatic transmission has a shift map determined in consideration of improvement in fuel efficiency, and the optimum gear stage corresponding to the vehicle speed and the accelerator opening or the throttle opening is determined according to this shift map. Switching is performed automatically.
For example, when the automatic transmission is a continuously variable transmission (CVT), a transmission ratio map is provided to control the transmission ratio according to the vehicle speed and the input rotational speed.
On the other hand, in a vehicle equipped with a manual transmission, it is difficult to automatically select a gear stage that is optimal for improving fuel efficiency because the driver arbitrarily operates the gear stage. Therefore, some vehicles are equipped with a gear stage indicating device that instructs the driver to shift to a predetermined gear stage in consideration of improvement in fuel consumption.
Such a gear stage indicating device is not limited to a manual transmission, but is an automatic transmission (AT) that realizes a stepped transmission by switching a gear set, or a continuously variable transmission that realizes a stepped control by fixing a gear ratio. Even in a vehicle equipped with the manual shift function, the driver can arbitrarily select a gear stage (speed ratio), so that the driver selects a gear stage (speed ratio) with good fuel efficiency for the driver. Is recommended.

JP-A-55-31669 Japanese Patent No. 3655466 JP 2008-309184 A

The shift timing command device for a vehicle transmission according to Patent Document 1 sets a shift position in advance from the relationship between the throttle opening and the engine speed in order to perform fuel efficiency optimal operation, and the current throttle opening and engine It is determined which region the rotational speed is in and an upshift or downshift command is issued. Specifically, when the throttle opening is equal to or less than the first opening threshold or the engine rotational speed is the first. When the throttle opening is equal to or greater than the second threshold, or when the engine speed is equal to or smaller than the second threshold, the downshift is issued. is there.
A gear position display device for an automatic transmission according to Patent Document 2 obtains a gear position that satisfies a preset driving condition based on a current driving state, and a gear position that satisfies a preset driving condition and a current gear position. Are compared with each other, and the direction of shifting is displayed based on the current gear position.
The vehicle shift guide device according to Patent Document 3 performs guidance for prompting a shift operation toward the optimum gear position when the optimum gear position and the actual gear position are different by giving a vibration stimulus to the driver. Is.

Conventionally, in Patent Document 1, when the automatic transmission is an automatic transmission (AT) or a continuously variable transmission (CVT), the gear stage that the driver is trying to select is selected by protection of the automatic transmission. There are cases where it is not possible. For example, in order to protect an automatic transmission or a continuously variable transmission, the use of the highest speed stage is prohibited when the oil temperature is low. In addition, simply indicating the gear stage calculated based on the best fuel efficiency, when the driver upshifts accordingly, the maximum speed stage is prohibited at low oil temperatures and the system does not accept it. There is a risk.
Further, in the above-mentioned Patent Document 2, control is performed based only on an appropriate operation region of a shift map that is a preset operation condition, and shift determination is performed in a normal shift control map. Does not take into account state information. Moreover, although it is disclosed that the display is changed between changeable and change instructions (lights up when changeable, blinks when change is instructed), it is only a selection on a single shift map (transmission) (The information during protection control from the controller (TCM) is not taken into account), so the protection control of the automatic transmission works, and there is a state where neither lighting nor flashing should be performed as in the case where there is a gear stage that cannot be selected. However, any display is performed, and an inconsistency occurs that an actual operation is not performed even if a manual operation is performed in accordance with a shift instruction.
Furthermore, in the above-mentioned Patent Document 3, when a function for calling attention is added to follow a gear shift instruction, the mismatch is emphasized as a more noticeable experience.
Such inconsistency does not affect the running of the vehicle. However, from the viewpoint of the driver, the instructions from the vehicle and the actions after the instructions are contradictory, resulting in a mysterious movement. Undermines trust.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a shift control device for an automatic transmission that can display an accurate shift speed instruction operation and match the shift speed instruction operation with an actual shift operation.

  The present invention relates to an automatic transmission that can be stepwise shifted by a plurality of fixed gear ratios, a gear stage detection device that detects a currently selected gear stage of the automatic transmission, and an optional one of the automatic transmission. A gear stage selection device that can select the gear stage of the automatic transmission based on human operation, and a display device that can perform a display prompting human operation for switching the gear stage of the automatic transmission, An automatic transmission having a function of setting a gear stage group that can be selected according to the state of the automatic transmission and a function of calculating an optimum gear stage or a gear stage group for improving fuel efficiency in consideration of the driving state of the vehicle In the shift control apparatus for a machine, a final target gear stage is calculated based on the selectable gear stage group and the gear stage or gear stage group optimal for improving fuel efficiency, and the final target gear stage And the current gear The display prompting the manual operation for switching the gear stage is characterized by instructing said display device.

  The shift control device for an automatic transmission according to the present invention can display an accurate shift speed instruction operation and can match the shift speed instruction operation with the actual shift speed operation.

FIG. 1 is a flowchart of shift instruction control. Example 1 FIG. 2 is a diagram for explaining a form in the case where transmission permission / prohibition is transmitted for all gear stages in FIG. (Examples 1 to 3) FIG. 3 is a diagram for explaining a mode in the case of transmitting a gear stage capable of shifting in FIG. (Examples 1 to 3) FIG. 4 is an input / output configuration diagram of an engine controller constituting the shift control device. Example 1 FIG. 5 is a shift map in the D range. (Examples 1 to 3) FIG. 6 is a shift map in the M range. (Examples 1 to 3) FIG. 7 is an example of a shift map in which fuel consumption is preferentially taken into account. (Examples 1 to 3) FIG. 8 is a flowchart of the shift instruction control. (Example 2) FIG. 9 is an input / output configuration diagram of an engine controller and a transmission controller constituting the transmission control device. (Example 2) FIG. 10 is a flowchart of the shift instruction control. (Example 3) FIG. 11 is an input / output configuration diagram of the engine controller and the gear position indicating device that constitute the speed change control device. (Example 3)

  The present invention displays an accurate gear position instruction operation and has the purpose of matching the gear position instruction operation and the actual gear shift operation with a selectable gear stage group and a gear stage or gear stage group optimal for improving fuel consumption. The final target gear stage is calculated based on this, and the final target gear stage is compared with the current gear stage, and a display that prompts human operation for switching the gear stage is instructed to be realized To do.

1 to 7 show Embodiment 1 of the present invention.
In the present invention, although not shown in detail, an automatic transmission connected to an engine mounted on a vehicle has a manual shift function and realizes a stepped shift by switching a gear set, or an automatic transmission (AT) or a gear ratio. It is assumed that it is an automatic transmission that is composed of a continuously variable transmission (CVT) that realizes stepped control by fixing the gear, and that can shift stepwise by a plurality of fixed gear ratios. In addition, the automatic transmission is provided with a gear stage selection device that includes a select lever and can select an arbitrary gear stage of the automatic transmission based on a manual operation. Then, the engine and the automatic transmission communicate with the transmission control device and are controlled by this transmission control device.
As shown in FIG. 4, the shift control device 1 includes an engine controller (denoted as “ECM” in the drawing) 2, a transmission controller (denoted as “TCM” in the drawing) 3, and a gear stage indicating device 4 as a display device. Is configured to realize a series of shift control and display control related to the shift, and includes an instruction gear stage calculation unit 5 described later.
The instructing gear stage calculation unit 5 inputs the calculated gear stage or gear group signal optimal for improving fuel efficiency and the calculated selectable gear stage signal to obtain the final target shift. Calculate the stage. Further, the instruction gear stage calculation unit 5 is capable of displaying a signal for prompting an artificial operation for switching the gear stage of the automatic transmission on the calculated final target gear stage signal. And the gear position instructing device 4 displays the calculated final target gear position.
The instruction gear stage calculation unit 5 may be provided in any one of the engine controller 2, the transmission controller 3, and the gear stage instruction device 4 that constitute the transmission control device 1. In the first embodiment, the engine controller 2 are provided as one functional unit.
Communication among the engine controller 2, the transmission controller 3, and the gear position indicating device 4 is realized by interconnection of communication lines of CAN communication.

As shown in FIG. 4, the engine controller 2 includes, as various detection means groups 6, an engine speed detection means 7 for detecting the engine speed, a vehicle speed detection means 8 for detecting the vehicle speed, and a throttle opening. CAN communication signal including various data such as the throttle opening detection means 9 to detect and the gear stage currently selected for the automatic transmission from the transmission controller 3, the oil temperature of the hydraulic oil of the automatic transmission, and the primary pulley rotational speed. The CAN signal input means 10 for inputting the information and the failure information detecting means 11 for detecting various types of failure information communicate with each other.
The transmission controller 3 outputs a signal of selectable gear stage information in consideration of the gear stage restriction to the engine controller 2.
The engine controller 2 inputs signals of engine speed, vehicle speed, throttle opening, CAN communication, various types of failure information, and gear stage information from the transmission controller 3, and an instruction gear stage calculation unit 5 provided as internal function means. To calculate the final target gear position, determine the instructed gear stage, and output a display request signal for the instructed gear stage to the gear stage instructing device 4.

The transmission controller 3 basically determines the engine and automatic transmission states, the vehicle running state, and the driver's operation status from input information such as the accelerator opening, the output shaft speed, the shift position, and the stop lamp switch. Determination is made and each solenoid of the automatic transmission is controlled based on a preset shift map.
Here, the automatic transmission is a continuously variable transmission (CVT) that realizes stepped control by fixing the gear ratio. For example, in the case of the D range, the vehicle speed of FIG. 5 and the input rotational speed of the primary pulley are used. As shown in the shift map, the shift is performed in the shift region R from the lowest (minimum value) to the highest (maximum value) of the pulley ratio.
Further, in the case of the M range, as shown in the shift map of the vehicle speed and the input rotational speed of the primary pulley in FIG. 6, from the first speed of the lowest (minimum value) to the sixth speed of the highest (maximum value). Shift lines are set in advance, gears are shifted stepwise on the set shift lines, and fixed pulley ratios of 1st to 6th gears are selected to enable a shift like a manual vehicle. That is, when a predetermined shift switch is operated in the D range, the M range is set, and the normal shift control can be temporarily switched to the manual mode control.
Then, selectable gear stages can be determined based on these shift maps to determine whether or not each gear stage can be shifted.
In the case of control in which the automatic transmission is a continuously variable transmission (CVT) as the gear stage or the gear stage group to be selected as the optimum gear stage for improving the fuel efficiency, a shift based on the vehicle speed and the input rotation speed is performed. The gear stage may be set using a map, or the gear stage may be set using a shift map based on the engine speed and the throttle opening, and a plurality of gear stages that can be arbitrarily selected may be provided.
On the other hand, in the case of control in which the automatic transmission is an automatic transmission (AT) that realizes a stepped shift by switching the gear set, a gear corresponding to the gear set is used using a shift map based on the vehicle speed and the throttle opening (accelerator opening). A stage is set and selectable. Note that the gear position selected in the manual mode or the like may be displayed on the gear stage indicating device 5.

In the first embodiment, the shift control device 1 configured by the engine controller 2, the transmission controller 3, and the gear position indicating device 4 has a function of setting a gear group that can be selected according to the state of the automatic transmission, A function of calculating a gear stage or a gear stage group that is optimal for improving fuel efficiency in consideration of a driving situation of the vehicle, and a gear stage or gear that is optimal for improving the fuel efficiency and the selectable gear stage group; The final target gear stage is calculated based on the stage group, and the final target gear stage is compared with the current gear stage, and a gear stage indicating device is displayed for prompting a manual operation for switching the gear stage. 4 is instructed.
In the case of the first embodiment, the engine controller 2 has a function of calculating the optimum gear stage or gear stage group for improving the fuel efficiency in consideration of the driving state of the vehicle. The transmission controller 3 has a function of setting the selectable gear stage group according to the state of the automatic transmission.
The selectable gear stage group is set in accordance with at least the temperature of the hydraulic oil of the automatic transmission and the shift map indicating the state of the automatic transmission.
Further, the gear stage or gear group optimum for improving the fuel efficiency is set based on at least the relationship between the engine speed and the throttle opening (see the shift map in FIG. 7), or the vehicle speed and the input speed are set. Based on a shift map for fuel consumption (not shown) based on the fuel consumption.

The engine controller 2 uses a command gear stage calculation unit 5 provided as an internal function means to determine the final target gear stage based on the selectable gear stage group and the gear stage or gear stage group that is optimal for improving fuel efficiency. Is calculated, and the final target gear stage is compared with the current gear stage to instruct the gear stage instructing device 4 to display a prompt for manual operation for switching the gear stage.
Further, the engine controller 2 compares the final target gear and the current gear, and if the final target gear does not match the current gear, the shift direction of the upshift or downshift Is displayed to the gear position indicating device 4, and when the final target gear position matches the current gear position, the gear position indicating device 4 displays a display prompting an artificial operation for switching the gear position. Do not instruct.
In this case, the engine controller 2 has a gear stage instruction function.

Further, in the first embodiment, the transmission controller 3 calculates a gear stage considering the gear stage limitation due to protection of the automatic transmission, and transmits a signal of selectable gear stage information to the engine controller 2. In other words, the selectable gear stage that is calculated takes into account limitations due to oil temperature and drive torque.
Then, the engine controller 2 considers the restriction transmitted from the transmission controller 3 and selects the gear stage or gear stage group that is most suitable for improving the fuel efficiency in consideration of the information on the gear stage that can be selected and the current driving situation of the vehicle. Then, the target gear stage is calculated.
Further, the engine controller 2 instructs the gear stage instructing device 4 to shift to the target gear stage calculated by the transmission controller 3.

  The gear position indicating device 4 performs display based on the instruction request. Note that the gear shift instruction display in the gear position indicating device 4 is a form in which the calculated target gear speed is displayed, or when the current gear speed and the target gear speed are compared and an upshift occurs, an up arrow or the like is displayed. When a shift occurs, a form such as a down arrow may be notified by a display using a mark that allows the driver to visually distinguish an upshift or a downshift.

Next, the gear position instruction of the engine controller 2 in the manual mode will be described based on the flowchart of FIG.
As shown in FIG. 1, when the program of the engine controller 2 is started (step A01), the current gear (GP_now) obtained through communication is read (step A02), and communication from the transmission controller 3 is performed. The shiftable gear stage information (GP_info) transmitted through the terminal is read (step A03). The shiftable gear stage information (GP_info) transmitted from the transmission controller 3 is, for example, as shown in FIG. A mode in which a shiftable gear is transmitted may be used.
Then, in consideration of the current driving situation, the optimum gear stage (GP_bestfuel) with the best fuel efficiency is calculated (step A04).
Further, the target gear stage (GP_target) is calculated from the shiftable gear stage information (GP_info) transmitted from the transmission controller 3 and the fuel efficiency optimum gear stage (GF_bestfuel) considering the current driving situation (step A05).
In this process, if the optimum fuel speed (GP_bestfuel) is included in the shiftable gear stage information (GP_info), the target gear stage (GP_target) becomes the optimum fuel speed (GP_bestfuel). If this fuel efficiency optimum gear stage (GP_bestfuel) is not included in the shiftable gear stage information (GP_info), the target gear stage (GP_target) that becomes the optimum gear stage in the shiftable gear stage information (GP_info) Is calculated.
Then, it is determined whether or not the target gear stage (GP_target) matches the current gear stage (GP_now) (step A06).
If this step A06 is YES, no shift instruction is given (step A07).
On the other hand, if this step A06 is NO, it is determined whether or not the target gear stage (GP_target) is larger than the current gear stage (GF_now) (step A08).
If this step A08 is YES, an upshift gear stage is instructed (step A09), while if this step A08 is NO, a downshift gear stage is instructed (step A10).
After the process of step A09 or after the process of step A10, a gear change instruction to the target gear stage (GP_target) is given to the gear stage instruction apparatus 4 (step A11), and the program is ended (step A12).

In the flowchart of FIG. 1, in step A05 described above, the gear stage of the fuel efficiency optimum gear stage (GP_bestfuel) is not included in the gear stage group included in the shiftable gear stage information (GP_info). Therefore, it is necessary to recalculate the target gear stage (GP_target). For this reason, if it is determined in step A05 that the gear stage of the fuel efficiency optimum gear stage (GP_bestfuel) is not included in the gear stage group included in the shiftable gear stage information (GP_info), the fuel efficiency is improved. In order to calculate the optimum gear, the calculation of the optimal fuel consumption gear (GP_bestfuel) in step A04 may be performed in step A05, and step A04 and step A05 are looped. It can also be repeated.
Alternatively, in the calculation in step A04 described above, calculation is performed including the next optimal fuel efficiency gear stage (GP_bestfuel), and the optimal fuel efficiency gear stage (GP_bestfuel) is calculated in order to calculate the optimal gear stage group for improving fuel efficiency. May be set as a gear stage group with ranking.

  That is, in the first embodiment, in a vehicle equipped with a manual mode (manually operable mode) and equipped with an automatic transmission having a shift speed instruction (display) function, the driver can arbitrarily select a gear position. In the scene, the method of instructing the gear to select the gear with the best fuel efficiency for the driver, information on the gear that can be shifted from the automatic transmission and the gear that is optimal for improving the fuel efficiency. The target gear stage is calculated in consideration of this, and the gear stage selected by the driver is canceled according to the instruction of the gear stage indicating device 4 even when the gear stage is limited by the protection control of the automatic transmission. It is possible to display the gear stage where no mismatch occurs.

8 and 9 show Embodiment 2 of the present invention. Components corresponding to the configuration of the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.
In the second embodiment, as shown in FIG. 9, the shift control device 1 including the engine controller 2, the transmission controller 3, and the gear position indicating device 4 calculates the instruction gear stage for calculating the final target gear position. The difference is that the portion 5 is provided not in the engine controller 2 but in the transmission controller 3.
That is, the engine controller 2 transmits to the transmission controller 3 a signal of the gear stage or gear stage group that is optimal for improving the fuel efficiency and a signal of the selectable gear stage group.
Then, the transmission controller 3 calculates a final target gear stage based on the selectable gear stage group and the gear stage or gear stage group that is optimal for improving the fuel efficiency, and the final target gear stage. The gear stage indication device 4 is instructed to display a display for prompting an artificial operation for switching the gear stage by comparing the gear stage with the current gear stage.
In this case, the transmission controller 3 has a gear stage instruction function.

Next, the gear position instruction of the transmission controller 3 will be described based on the flowchart of FIG.
As shown in FIG. 8, when the program of the transmission controller 3 is started (step B01), the current gear (GP_now) is read (step B02), and the fuel consumption transmitted from the engine controller 2 via communication is improved. The optimum optimum gear (GP_bestfuel) is read (step B03). The optimum gear stage (GP_bestfuel) that provides the best fuel consumption is not shown in the figure, but may be a form that transmits appropriateness information of the best fuel consumption for all gear stages, or a form that transmits only the gear stage that provides the best fuel consumption.
Then, the gear position information (GP_info) that can be shifted is calculated in consideration of the current driving situation (step B04).
Then, the target gear stage (GP_target) is calculated from the fuel speed optimum gear stage (GF_bestfuel) in consideration of the shiftable gear stage information (GP_info) and the current driving situation transmitted from the engine controller 2 (step B05).
In this process, if the optimum fuel speed (GP_bestfuel) is included in the shiftable gear stage information (GP_info), the target gear stage (GP_target) becomes the optimum fuel speed (GP_bestfuel). If this fuel efficiency optimum gear stage (GP_bestfuel) is not included in the shiftable gear stage information (GP_info), the target gear stage (GP_target) that becomes the optimum gear stage in the shiftable gear stage information (GP_info) Is calculated.
Then, it is determined whether or not the target gear stage (GP_target) matches the current gear stage (GP_now) (step B06).
If this step B06 is YES, no shift instruction is given (step B07).
On the other hand, if this step B06 is NO, it is determined whether or not the target gear stage (GP_target) is larger than the current gear stage (GF_now) (step B08).
If this step B08 is YES, an upshift gear stage is instructed (step B09), while if this step B08 is NO, a downshift gear stage is instructed (step B10).
After the process of step B09 or after the process of step B10, a gear shift instruction to the target gear stage (GP_target) is given to the gear stage instruction apparatus 4 (step B11), and the program is ended (step B12).

10 and 11 show Embodiment 3 of the present invention. Components corresponding to the configuration of the first embodiment described above or components corresponding to the configuration of the second embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.
In the third embodiment, as shown in FIG. 11, the shift control device 1 constituted by the engine controller 2, the transmission controller 3, and the gear position indicating device 4 calculates an instruction gear stage for calculating a final target gear position. The main difference is that the portion 5 is provided not in the engine controller 2 and the transmission controller 3 but in the gear position indicating device 4.
That is, the engine controller 2 transmits a gear or gear group signal that is optimal for improving the fuel efficiency to the gear indicating device 4.
Then, the transmission controller 3 transmits a signal of the selectable gear stage group to the gear stage indicating device 4.
This gear stage indicating device 4 has a final target gear based on the gear stage group that can be selected by the instruction gear stage calculating unit 5 provided as an internal function and the gear stage or gear stage group that is optimal for improving fuel efficiency. The stage is calculated, and the final target gear stage is compared with the current gear stage, and a display for prompting an artificial operation for switching the gear stage is performed.

Next, the gear position instruction of the gear position indicating device 4 will be described based on the flowchart of FIG.
As shown in FIG. 10, when the gear stage indicating device 4 starts the program (step C01), the current gear stage (GP_now) obtained through communication is read (step C02). The optimum gear (GP_bestfuel) with the best fuel efficiency transmitted through communication is read (step C03). The optimum gear stage (GP_bestfuel) that gives the best fuel efficiency in consideration of the current driving situation is not shown in the figure, but, for example, only the gear stage that provides the best fuel consumption or the form that transmits the propriety information of the best fuel consumption for all gear stages May be transmitted.
Then, shiftable gear stage information (GP_info) transmitted from the transmission controller 3 through communication is read (step C04). The shiftable gear stage information (GP_info) obtained from the transmission controller 3 through communication is, for example, as shown in FIG. Alternatively, a shiftable gear stage may be used.
Further, the target gear stage (GP_target) is calculated from the shiftable gear stage information (GP_info) transmitted from the transmission controller 3 and the fuel efficiency optimum gear stage (GF_bestfuel) considering the current driving situation (step C05).
In this process, if the optimum fuel speed (GP_bestfuel) is included in the shiftable gear stage information (GP_info), the target gear stage (GP_target) becomes the optimum fuel speed (GP_bestfuel). If this fuel efficiency optimum gear stage (GP_bestfuel) is not included in the shiftable gear stage information (GP_info), the target gear stage (GP_target) that becomes the optimum gear stage in the shiftable gear stage information (GP_info) Is calculated.
Then, it is determined whether or not the target gear stage (GP_target) matches the current gear stage (GP_now) (step C06).
If step C06 is YES, no shift instruction is given (step C07).
On the other hand, if this step C06 is NO, it is determined whether or not the target gear stage (GP_target) is larger than the current gear stage (GF_now) (step C08).
When this step B08 is YES, an upshift gear stage is instructed (step C09), while when this step A08 is NO, a downshift gear stage is instructed (step C10).
After the process of step C09 or after the process of step C10, a shift instruction to the target gear stage (GP_target) is displayed (step C11), and the program is ended (step C12).

Although the embodiments of the present invention have been described above, the configuration of the above-described embodiments will be described for each claim.
In the invention according to claim 1, the final target gear stage is calculated on the basis of the selectable gear stage group and the gear stage or gear stage group that is most suitable for improving fuel efficiency, and the final target gear stage is calculated. Is compared with the current gear stage, and the gear stage instructing device 4 is instructed to display for prompting an artificial operation for switching the gear stage.
As a result, a truly selectable gear stage can be displayed as a display for prompting an artificial operation for switching the gear stage.
In addition, when an artificial selection operation is performed according to the gear position indicating device 4, there is no inconsistency resulting in an operation result of canceling the selection, and reliability can be ensured.
In the invention according to claim 2, when the final target gear stage and the current gear stage are not matched as a result of comparison between the final target gear stage and the current gear stage, the upshift or downshift shift direction is determined. Is displayed on the gear stage indicating device 4, while if the final target gear stage and the current gear stage coincide with each other, the gear stage indicating apparatus 4 is displayed with a prompt for manual operation for switching the gear stage. Do not instruct.
As a result, the display on the gear stage indicating device 4 can be made concrete, and the driver can understand the gear stage sensuously and can cope with it. Further, it is not necessary to determine the instruction content from the display mode, and the burden on the driver can be reduced.
In the invention according to claim 3, the transmission controller 3 having a function of setting a gear stage group that can be selected according to the state of the automatic transmission, and the optimum gear for improving the fuel consumption in consideration of the driving situation of the vehicle And an engine controller 2 having a function of calculating a stage or a gear stage group, and the transmission controller 3, the engine controller 2, and the gear stage indicating device 4 are connected via a communication line. The transmission controller 3 sends selectable gear group signals to the engine controller 2. The engine controller 2 calculates a final target gear stage based on a selectable gear stage group and a gear stage or a gear stage group that is optimal for improving fuel efficiency, and the final target gear stage and the current gear stage. The gear stage indicating device 4 is instructed to display a display for prompting an artificial operation for switching the gear stage by comparing with the stage.
As a result, the detailed state of the automatic transmission and the gear speeds that can be selected in the transmission controller 3 do not need to be independently determined by the engine controller 2, and can be grasped by communicating information on the gear speeds that can be shifted. Inconsistency with the display can be eliminated.
Furthermore, fine exception conditions such as for protection can be handled by setting the selectable gear stage group.
In the invention according to claim 4, the transmission controller 3 having a function of setting a gear group that can be selected according to the state of the automatic transmission, and the optimum gear stage for improving the fuel consumption in consideration of the driving situation of the vehicle. Alternatively, an engine controller 2 having a function of calculating a gear stage group is provided, and the transmission controller 3, the engine controller 2, and the gear stage indicating device 4 are connected via a communication line. The engine controller 2 transmits to the transmission controller 3 a gear or gear group signal that is optimal for improving fuel efficiency and the selectable gear group signal. The transmission controller 3 calculates a final target gear stage based on the selectable gear stage group and the gear stage or gear stage group that is optimal for improving the fuel efficiency. The gear stage instructing device 4 is instructed to display a display for prompting an artificial operation for switching the gear stage by comparing with the current gear stage.
As a result, the detailed state of the automatic transmission and the gear speeds that can be selected in the transmission controller 3 do not need to be independently determined by the engine controller 2, and can be grasped by communicating information on the gear speeds that can be shifted. Inconsistency with the display can be eliminated.
Furthermore, fine exception conditions such as for protection can be handled by setting the selectable gear stage group.
In the invention according to claim 5, the transmission controller 3 having a function of setting a gear group that can be selected according to the state of the automatic transmission, and the optimum gear stage for improving the fuel consumption in consideration of the driving situation of the vehicle. Alternatively, an engine controller 2 having a function of calculating a gear stage group is provided, and the transmission controller 3, the engine controller 2, and the gear stage indicating device 4 are connected via a communication line. The engine controller 2 sends the gear stage or gear group signal that is optimal for improving the calculated fuel efficiency to the gear stage indicating device 4. The transmission controller 3 transmits the calculated selectable gear stage group signal to the gear stage indicating device 4. The gear stage indicating device 4 calculates a final target gear stage based on a selectable gear stage group and a gear stage or a gear stage group that is optimal for improving fuel efficiency, and the final target gear stage Compared with the current gear stage, a display for prompting an artificial operation for switching the gear stage is performed.
Thus, similar to the effect of claim 3 or claim 4, the detailed state of the automatic transmission and the gear stage that can be selected in the transmission controller 3 do not need to be independently determined by the engine controller 2 and can be changed. Can be grasped by communicating information on the correct gear stage, and inconsistencies with the display can be eliminated.
Furthermore, fine exception conditions such as for protection can be handled by setting the selectable gear stage group.

It should be noted that the present invention is not limited to the above-described embodiments, and various application modifications can be made.
For example, in the above-described third embodiment, the engine controller 2 and the transmission controller 3 individually select a gear stage or a gear stage group that is optimal for improving fuel efficiency and a selectable gear stage group to the gear stage instruction device 4. However, the transmission controller 3 transmits a signal of a gear group that can be selected by the transmission controller 3 to the engine controller 2, and the engine controller 2 can select a gear stage or a gear group that is optimal for improving fuel efficiency. A group of gears may be collected and transmitted to the gear gear indicating device 4.

  The shift control device for an automatic transmission according to the present invention can be applied to various vehicles.

1 Shift control device 2 Engine controller (ECM)
3 Transmission controller (TCM)
4 Gear stage indicating device (display device)
5 Indicated gear stage calculation unit 6 Various detection means group 7 Engine rotation speed detection means 8 Vehicle speed detection means 9 Throttle opening detection means 10 CAN signal detection means 11 Failure information detection means

Claims (5)

  An automatic transmission that can be stepped by a plurality of fixed gear ratios, a gear detection device that detects a currently selected gear of the automatic transmission, and an arbitrary gear of the automatic transmission The automatic transmission is in contact with a gear stage selection device that can be selected based on a manual operation and a display device that can display a manual operation for switching the gear stage of the automatic transmission. Shift control of an automatic transmission having a function of setting a gear stage group that can be selected according to the state of the vehicle and a function of calculating an optimal gear stage or gear stage group for improving fuel efficiency in consideration of the driving state of the vehicle In the apparatus, a final target gear stage is calculated based on the selectable gear stage group and the gear stage or gear stage group optimal for improving the fuel efficiency, and the final target gear stage and the current gear stage are calculated. Compared with Shift control device for an automatic transmission, characterized by instructing the display prompting the manual operation for instead of the display device.   As a result of comparing the final target gear stage with the current gear stage, if the final target gear stage and the current gear stage do not match, an indication of the shift direction of upshift or downshift is displayed on the display device. 2. On the other hand, when the final target gear stage and the current gear stage coincide with each other, the display device is not instructed to display a display for prompting an artificial operation for switching the gear stage. A shift control device for an automatic transmission according to claim 1.   A transmission controller having a function of setting the selectable gear stage group according to the state of the automatic transmission, and a gear stage or a gear stage group that is optimal for improving the fuel efficiency is calculated in consideration of a driving situation of the vehicle. An engine controller having a function, wherein the transmission controller, the engine controller, and the display device are connected via a communication line, and the transmission controller transmits a signal of the selectable gear group to the engine controller. The engine controller calculates a final target gear stage based on the selectable gear stage group and the gear stage or gear stage group optimal for improving the fuel efficiency, and the final target gear stage. Compared with the current gear position, the display prompting human operation for switching the gear position Shift control system for an automatic transmission according to claim 1, characterized in that instructs the display device.   A transmission controller having a function of setting the selectable gear stage group according to the state of the automatic transmission, and a gear stage or a gear stage group that is optimal for improving the fuel efficiency is calculated in consideration of a driving situation of the vehicle. An engine controller having a function, wherein the transmission controller, the engine controller, and the display device are connected via a communication line, and the engine controller is an optimum gear stage or gear stage group signal for improving the fuel efficiency. And a signal of the selectable gear stage group to the transmission controller, and the transmission controller performs a final determination based on the selectable gear stage group and the gear stage or gear stage group optimal for improving the fuel consumption. And calculate the final target gear and the final target gear Shift control system for an automatic transmission according to comparing the Ya stage display prompting the manual operation for switching the gear stage to claim 1, characterized by instructing the display device.   A transmission controller having a function of setting the selectable gear stage group according to the state of the automatic transmission, and a gear stage or a gear stage group that is optimal for improving the fuel efficiency is calculated in consideration of a driving situation of the vehicle. An engine controller having a function, wherein the transmission controller, the engine controller, and the display device are connected via a communication line, and the engine controller is a gear stage or a gear stage group that is optimal for improving the calculated fuel efficiency. The transmission controller transmits the calculated signal of the selectable gear stage group to the display apparatus, and the display apparatus transmits the selectable gear stage group and the fuel efficiency. Calculate the final target gear based on the gear or gear group that is optimal for improvement Shift control system for an automatic transmission according to claim 1, characterized in that performing display by comparing the final target gear and the current gear urging manual operation for switching the gear.

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