JP2019074159A - Shift control device - Google Patents

Abstract

To provide a shift control device that can perform shifting at timing according to a driver's intention.SOLUTION: A shift control device includes: an input part for receiving a permission signal input from a shift permission operation part; a gear ratio determining part for determining a gear ratio in a transmission based on an operational state of a vehicle; and a control part for controlling the transmission so as to provide the gear ratio that is determined by the gear ratio determining part when a permission signal is input from the shift permission operation part.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a transmission control device.

  Patent Document 1 discloses a so-called AMT (Automated Manual Transmission) based on a manual transmission, in which the shifting operation and the connection / disconnection operation of the clutch device accompanying the shifting are automated.

JP, 2017-96432, A

  In the AMT as described in Patent Document 1, a target shift speed is calculated from a shift map set in advance based on an accelerator opening degree, a vehicle speed and the like, and a shift operation and shift are performed to realize this target shift speed. The accompanying connection / disconnection operation of the clutch device is performed automatically. Therefore, a shift may be performed at an unintended timing of the driver, which may cause the driver to be dissatisfied.

  An object of the present disclosure is to provide a shift control device capable of shifting at timing according to the driver's intention.

The transmission control device according to the aspect of the present invention is
An input unit that receives an input of a permission signal from the shift permission operation unit;
A gear ratio determination unit that determines a gear ratio of the transmission based on the driving state of the vehicle;
A control unit configured to control the transmission so as to realize the gear ratio determined by the gear ratio determination unit when the permission signal from the shift permission operation unit is input;
Equipped with

  According to the shift control device according to the aspect of the present invention, the shift can be performed at a timing in line with the driver's intention.

FIG. 1 is a schematic view showing an entire configuration of a vehicle equipped with a transmission control device according to an embodiment. Flow chart showing an example of the transmission control process A time chart showing an example of gear change Time chart showing another example of gear change

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiment described below is an example, and the present invention is not limited by this embodiment.

  First, with reference to FIG. 1, the whole structure of the vehicle 1 by which the speed-change control apparatus which concerns on embodiment is mounted is demonstrated. The vehicle 1 includes a drive source 10, a clutch 20, a transmission 30, and a control device 40. A drive wheel 54 is connected to the output side of the transmission 30 via a propeller shaft 51, a differential 52 and a drive shaft 53 so that power can be transmitted.

  The driving source 10 generates a driving force used to drive the vehicle 1. The drive source 10 is, for example, a diesel engine. The drive source 10 may be a gasoline engine, an electric motor or the like. In the following description, the drive source 10 is referred to as an engine 10. The engine 10 is provided with an output shaft 11.

  The clutch 20 is for interrupting transmission of driving force from the engine 10 to the transmission 30. The clutch 20 is, for example, a dry type single disc clutch. The clutch 20 may be a wet clutch, or may be a sub-plate or a multi-plate clutch. The input side of the clutch 20 is connected to the output shaft 11 of the engine 10. The output side of the clutch 20 is connected to the input shaft 31 of the transmission 30.

  The transmission 30 is, for example, a normally meshed mechanical transmission. The transmission 30 shifts the driving force input to the input shaft 31 and outputs it from the output shaft 32. The propeller shaft 51 is connected to the output shaft 32, and the driving force is transmitted to the drive wheel 54 via the propeller shaft 51, the differential 52 and the drive shaft 53 as described above.

  The accelerator opening degree ACC detected by the accelerator opening degree sensor 101 and the vehicle speed V detected by the vehicle speed sensor 102 are input to the control device 40. Further, a permission signal from the shift permission pedal 103 (an example of the “shift permission operation unit”) is input to the control device 40. The shift permission pedal 103 is, for example, a foot pedal which is disposed in the vicinity of the brake pedal in the driver's seat and can be operated by the driver's foot.

  The control device 40 includes an input unit 41, a storage unit 42, a shift position determination unit (an example of a "gear ratio determination unit") 43, and a control unit 44 as functional elements. The input unit 41 receives an accelerator opening signal indicating the accelerator opening ACC, a vehicle speed signal indicating the vehicle speed V, a permission signal from the shift permission pedal 103, and the like. The storage unit 42 stores a shift map using the accelerator opening degree and the vehicle speed as parameters. The shift speed determination unit 43 uses the shift map stored in the storage unit 42 based on the accelerator opening degree ACC detected by the accelerator opening degree sensor 101 and the vehicle speed V detected by the vehicle speed sensor 102. Determine the gear position of. The control unit 44 controls the clutch 20 and the transmission 30 based on the gear position determined by the gear position determination unit 43 and the permission signal from the shift permission pedal 103.

  Next, with reference to the flowchart of FIG. 2, an example of processing contents of the shift control performed in the vehicle 1 will be described. Note that such shift control processing is repeatedly performed in a predetermined control cycle.

  First, in step S1, the control device 40 (specifically, the shift gear position determination unit 43) is based on the accelerator opening degree ACC detected by the accelerator opening degree sensor 101 and the vehicle speed V detected by the vehicle speed sensor 102. The gear position is determined using the gear shift map stored in the storage unit 42.

  In the subsequent step S2, the control device 40 (specifically, the control unit 44) determines whether or not the shift permission pedal 103 is depressed.

  If it is determined in step S2 that the shift permission pedal 103 has been depressed (step S2: YES), the process proceeds to step S3.

  Then, in step S3, the control device 40 (specifically, the control unit 44) performs the clutch 20 and the transmission in order to realize the shift position determined in step S1 (hereinafter referred to as "target shift position"). The control signal is output to 30 to execute the shift. Specifically, when the target gear position and the current gear position (hereinafter referred to as "the actual gear position") are different, the clutch 20 is disconnected in response to the control signal from the control device 40, and the transmission The transmission gear is switched to the target gear at 30 and the clutch 20 is engaged again. When the target gear and the actual gear coincide with each other, the connection / disconnection of the clutch 20 and the switching of the transmission gears in the transmission 30 are not performed.

  On the other hand, when it is determined in step S2 that the shift permission pedal 103 has not been depressed (step S2: NO), the processing is ended.

  Next, with reference to the time chart of FIG. 3, an example of the shift by the above-mentioned shift control processing will be described. In FIG. 3, the horizontal axis indicates time. Further, in FIG. 3, the vertical axis indicates the target shift speed, the actual shift speed, and the presence or absence of the shift permission signal.

At time t _0, the target gear position and the actual gear speed is consistent with the third speed, shift enable signal is in a state of "No" (i.e., shift permitting pedal 103 is not depressed).

At time t _1, with the change in the accelerator opening and the vehicle speed, the gear determination unit 43, the target gear position is determined to be fourth gear. At this time, since the shift permission pedal 103 is not depressed, the shift permission signal continues to be in the state of "none". Therefore, a control signal for realizing the fourth gear is not output from the control unit 44 to the clutch 20 and the transmission 30, and the actual gear is maintained at the third gear.

At the time t _2, when the shift permitting pedal 103 is depressed, the shift enable signal is changed to a state of "Yes". Along with this, a control signal for realizing the fourth gear is output from the control unit 44 to the clutch 20 and the transmission 30, and a shift to the fourth gear is performed. Note that after the depression of the shift permitting pedal 103 at time t _2, the even shift permitting pedal 103 is released, the target gear position and the actual gear speed is consistent with the fourth speed, gear position fourth speed It is as it is.

Time t ₂ later, while traveling in the fourth speed, the accelerator opening and the vehicle speed is changed at time t _3, even when the target gear position is determined to the third speed stage, have shift permitting pedal 103 is depressed since no shift at time t ₃ to the third speed stage is not performed. Then, at time t _4, when the shift permitting pedal 103 is depressed, the shift is performed to the third speed.

  Next, with reference to the time chart of FIG. 4, another example of the shift by the above-described shift control process will be described. In FIG. 4, the horizontal axis indicates time. Further, in FIG. 4, the vertical axis indicates the target shift speed, the actual shift speed, and the presence or absence of the shift permission signal.

At time t _10, the target gear position and the actual gear speed is consistent with the third speed, shift enable signal is in a state of "No" (i.e., shift permitting pedal 103 is not depressed).

At time t _11, the accelerator opening and the vehicle speed is changed, the target gear position is determined to be fourth gear. At this time, since the shift permission pedal 103 is not depressed, the shift permission signal continues to be in the "absent" state, and the actual shift position maintains the third speed.

At time t _12, the shift permitting pedal 103 is depressed, the shift enable signal is changed to the state of "Yes". Along with this, a shift to the fourth gear is performed.

In this embodiment, after the depression of the shift permitting pedal 103 at time t _12, remains shift allowable pedal 103 is depressed. In this state, from the time t ₁₂ to time t _13, since the target gear and the actual gear speed is consistent, shift is not executed. Then, the accelerator opening and the vehicle speed is changed at time t _13, when the target gear position is determined to be the third speed, at time t ₁₃ is shifting to the third speed is performed.

  As described above, according to the present embodiment, the input unit that receives the input of the permission signal from the shift permission pedal, and the gear position determination unit that determines the gear position of the transmission based on the accelerator opening degree and the vehicle speed. There is provided a shift control device including: a control unit that controls the transmission to realize the shift speed determined by the shift speed determination unit when the permission signal from the shift permission pedal is input.

  Therefore, the shift can be performed at the timing when the driver depresses the shift permission pedal to the shift position determined based on the driving state of the vehicle, and the shift can be performed at the timing according to the driver's intention. It becomes. In addition, if the driver depresses the shift permission pedal, it is possible to perform the shift based on the driving state of the vehicle, which is beneficial for improving the fuel efficiency and securing the driving force.

  Further, according to the present embodiment, the shift permission operation can be performed by the driver's foot by adopting the shift permission pedal. Therefore, the driver can perform the shift permission operation without releasing his / her hand from the steering wheel, and safety can be ensured.

  Furthermore, in this embodiment, the transmission is an AMT. The AMT is a transmission of a type in which the driving force transmitted from the driving source to the driving wheels is temporarily interrupted in accordance with the disconnection and connection of the clutch at the time of shifting. Therefore, in AMT, generally, when a shift is performed at a timing not in line with the driver's intention, the driver's sense of incongruity is greater than that of other types of transmissions. In that respect, according to the present embodiment, since the clutch can be engaged and disengaged at a timing according to the driver's intention, the driver's discomfort caused by the AMT transmission can be effectively reduced. be able to.

  In addition, in the above-mentioned embodiment, although AMT was demonstrated to an example as a transmission, it is not limited to this. As a transmission, step AT (Automatic Transmission) may be used. In this case, the control contents for executing the shift are engagement and disengagement of the friction clutch in the transmission. Furthermore, another type of stepped transmission such as DCT (Dual Clutch Transmission) may be used, or an all-time transmission such as belt type CVT (Continuously Variable Transmission) or toroidal CVT may be used. That is, the type of transmission is not limited at all.

  Moreover, in the above-mentioned embodiment, although the thing of a foot pedal type was demonstrated to the example as a shift permission operation part, it is not limited to this. The shift permission operation unit may be provided on a shift lever or the like and operated manually. For example, by providing the shift permission operation unit on the steering wheel, it is possible to expect the effect that the shift permission operation can be performed without releasing the hand from the steering wheel, as in the foot pedal type.

  Moreover, although the above-mentioned embodiment demonstrated to an example the thing which determines a gear stage based on the throttle opening and the vehicle speed, it is not limited to this. In the case of a vehicle provided with a throttle valve, the throttle opening degree may be used as a parameter or another parameter. Further, instead of the vehicle speed, the rotation speed of the output shaft of the transmission may be used. Further, the gear may be determined based on the road condition, road information, and the like.

  According to the shift control device of the present disclosure, it is possible to shift at timing according to the driver's intention, and the industrial applicability is great.

1 Vehicle 10 Drive Source (Engine)
11 output shaft 20 clutch 30 transmission 31 input shaft 32 output shaft 40 control device 41 input unit 42 storage unit 43 gear position determination unit 44 control unit 51 propeller shaft 52 differential 53 drive shaft 54 drive wheel 101 accelerator opening sensor 102 vehicle speed sensor 103 shift permission pedal

Claims (4)

An input unit that receives an input of a permission signal from the shift permission operation unit;
A gear ratio determination unit that determines a gear ratio of the transmission based on the driving state of the vehicle;
A control unit configured to control the transmission so as to realize the gear ratio determined by the gear ratio determination unit when the permission signal from the shift permission operation unit is input;
Transmission control device comprising: The shift permission operation unit is a foot pedal operated by a driver.
The transmission control device according to claim 1. The transmission is a mechanical transmission in which the driving force transmitted from the driving source to the driving wheels is temporarily shut off during gear shifting.
The transmission control device according to claim 1. The transmission ratio determination unit determines the transmission ratio based on an accelerator opening degree and a vehicle speed.
The transmission control device according to any one of claims 1 to 3.

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