JP2016098728A - Driving force control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving force control device capable of suppressing generation of torque shock after completion of gear shifting.SOLUTION: In a driving force control device 1, a control portion 5 for temporarily changing driving force by temporarily changing a throttle opening by controlling a motor driving portion 6 so that gear shifting of a dog-type transmission is enabled by releasing or weakening engagement of dogs of the dog-type transmission in a case where a gear shifting operation of the dog-type transmission is detected in a state that connection of a main clutch is detected, controls the motor driving portion 6 so that the throttle opening is changed to a direction to converge temporal change of the throttle opening from a prescribed opening according to change of a shift state of the dog-type transmission detected by a shift stage detecting portion 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a driving force control device, and more particularly, to a driving force control device mounted on a straddle-type vehicle that transmits driving force of an engine to driving wheels through a main clutch and a dog transmission in order.

  Some motorcycles have a dog-type transmission. In such a dog-type transmission, the driver does not operate the main clutch, and the dogs of the dog-type transmission are in contact with each other (dog teeth), and one of the engine and the driving wheel drives the other, Shifting can be performed. According to such a configuration, the driver can quickly shift gears by omitting the operation of the main clutch.

  However, in a state where one of the engine and the driving wheel is driving the other, a large pressing force acts on the contact surface between the dogs of the dog type transmission. For this reason, even if the driver tries to separate the dogs for shifting, it is difficult to separate the dogs by the operation of the driver because a large static frictional force proportional to the pressing force is acting on the contact surface. Tend to be.

  Under such circumstances, Patent Document 1 relates to a shift control device for a motorcycle, and when a shift operation is detected in a state where one of an engine and a drive wheel drives the other, the throttle opening is electronically controlled. A configuration is disclosed in which contact between dogs is temporarily released by changing the driving force of the engine by changing the driving force.

Japanese Patent No. 4392794

  However, according to the study of the present inventor, the configuration of Patent Document 1 is more specifically the initial throttle opening of the engine when a shift operation (shift-up operation and shift-down operation) by the driver is detected. In addition to changing to the opening, and maintaining the throttle opening of the engine at the initial opening even after completion of the shift, the throttle opening of the engine is gradually brought close to the required throttle opening.

  Here, according to a further study by the present inventor, when the throttle opening is changed step by step so as to approach the required throttle opening in this way, the torque shock continues for a long time after the completion of the shift. There is room for improvement due to trends. Of course, when the throttle opening of the engine is suddenly changed to the required throttle opening at the time of completion of the shift, the dogs of the dog type transmission tend to collide strongly with each other and a large torque shock may occur. . Such a tendency becomes more prominent when the vehicle is a lightweight straddle-type vehicle such as a motorcycle.

  The present invention has been made through the above-described studies, and an object of the present invention is to provide a driving force control device capable of suppressing the occurrence of a torque shock after completion of a shift.

  In order to achieve the above object, the present invention is mounted on a straddle-type vehicle that transmits engine driving force to driving wheels through a main clutch and a dog type transmission in order, and detects connection or disconnection of the main clutch. A clutch state detection unit, a shift operation detection unit that detects a shift operation of the dog transmission, a motor drive unit that drives a motor that changes the throttle opening of the engine, and the clutch state detection unit When the shift operation detection unit detects the shift operation of the dog type transmission in a state where the connection is detected, the engagement of the dogs of the dog type transmission is released or weakened, and the dog type transmission By controlling the motor drive so that shifting is possible. A control unit that temporarily changes the throttle opening to temporarily change the driving force, wherein the driving force control device detects a gear stage of the dog transmission. The control unit further comprises a step of changing the throttle opening from a predetermined opening to a temporary change of the throttle opening in response to switching of the gear detected by the gear detection unit. The first aspect is to control the motor drive unit so as to change the direction of convergence.

  Further, according to the present invention, in addition to the first aspect, the control unit changes in the direction in which the temporary change in the throttle opening converges while the throttle opening is inclined with respect to time. The second aspect is to control the motor driving section so as to make it happen.

  Further, according to the present invention, in addition to the first or second aspect, the control unit opens the throttle opening degree according to the predetermined opening degree in response to switching of the shift stage detected by the shift stage detection unit. It is a third aspect to control the motor drive unit so as to change from the degree toward the required throttle opening required by the accelerator operation of the saddle riding type vehicle.

  Further, according to the present invention, in addition to the third aspect, the control unit opens the throttle to a predetermined opening between the throttle opening and the required throttle opening at the time when the shift speed is changed. It is a fourth aspect to control the motor drive unit so as to change the throttle opening toward the required throttle opening after maintaining the degree.

  Further, in the present invention, in addition to the fourth aspect, a no-load line indicating an operating state of the engine capable of releasing the engagement between the dogs is set in advance, and the predetermined opening is determined by the no-load line. Is set to an opening value between the throttle opening corresponding to the above and the required throttle opening.

  According to the driving force control device according to the first aspect of the present invention described above, when a shift operation of the dog transmission is detected in a state where the connection of the main clutch is detected, the dogs of the dog transmission are Control that temporarily changes the throttle opening by temporarily controlling the throttle opening by controlling the motor drive so that the dog-type transmission can be shifted by releasing or weakening the engagement. The motor drive unit is configured to change the throttle opening from a predetermined opening to a direction in which the temporary change of the throttle opening converges in response to switching of the gear detected by the gear detection unit. Therefore, it is possible to suppress the occurrence of a torque shock after the completion of shifting.

  Further, according to the driving force control apparatus of the second aspect of the present invention, the control unit changes in a direction in which the temporary change of the throttle opening converges while the throttle opening is inclined with respect to the passage of time. As described above, since the motor drive unit is controlled, it is possible to more reliably suppress the occurrence of a torque shock after the completion of shifting.

  Further, according to the driving force control apparatus of the third aspect of the present invention, the control unit changes the throttle opening from the predetermined opening in accordance with the change of the gear detected by the gear detection unit. Since the motor drive unit is controlled so as to change toward the required throttle opening required by the accelerator operation of the riding type vehicle, it is possible to more reliably suppress the occurrence of a torque shock after the completion of the shift. it can.

  Further, according to the driving force control apparatus of the fourth aspect of the present invention, the control unit sets the throttle opening to a predetermined opening between the throttle opening and the requested throttle opening at the time when the gear position is switched. Since the motor drive unit is controlled so that the throttle opening is changed toward the required throttle opening after the engine is maintained, the impact due to the collision between the dogs can be reduced during the shift, and the shift is completed. It is possible to more reliably suppress the occurrence of torque shock later.

  Further, according to the driving force control apparatus of the fifth aspect of the present invention, the no-load line indicating the operating state of the engine in which the dogs can be disengaged is set in advance, and the predetermined opening degree is the no-load line. Is set to an opening value between the throttle opening corresponding to the required throttle opening and the required throttle opening, so that the driving behavior of a saddle-ride type vehicle is controlled while suppressing the occurrence of torque shock after the completion of gear shifting. It can be close to what the person demands.

FIG. 1 is a block diagram illustrating a configuration of a driving force control apparatus according to an embodiment of the present invention. FIG. 2 is a flowchart showing the flow of the driving force control process by the driving force control apparatus in the present embodiment. FIG. 3 is a diagram illustrating a time change of the throttle opening accompanying a shift-up operation when the driving force control process by the driving force control device in the present embodiment is executed. FIG. 4 is a diagram illustrating a change over time in the throttle opening accompanying a shift-down operation when the driving force control process by the driving force control apparatus according to the present embodiment is executed.

  Hereinafter, a driving force control apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings as appropriate.

[Configuration of driving force control device]
First, the configuration of the driving force control apparatus in the present embodiment will be described with reference to FIG.

  FIG. 1 is a block diagram showing the configuration of the driving force control apparatus in this embodiment.

  As shown in FIG. 1, the driving force control device 1 according to the present embodiment is configured by an electronic control device such as an ECU (Electronic Control Unit), both of which are sequentially connected to an engine through a main clutch and a dog transmission that are not shown. It is typically mounted on a straddle-type vehicle such as a motorcycle that transmits the drive force to the drive wheels.

  The driving force control device 1 includes a clutch state detection unit 2, a shift operation detection unit 3, a gear position detection unit 4, a control unit 5, and a motor drive circuit 6. The clutch state detection unit 2, the shift operation detection unit 3, the gear position detection unit 4, and the control unit 5 are shown as functional blocks. In addition, the driving force control device 1 includes a memory (not shown) and the like, and a control program and control data necessary for the driving force control device 1 are stored in the memory.

  Specifically, the clutch state detection unit 2 connects or disconnects the main clutch based on an input signal from the clutch switch 11 that carries information related to the operation when the driver connects or disconnects the main clutch. To detect. The clutch state detection unit 2 inputs an electrical signal corresponding to the detected main clutch on / off operation to the control unit 5.

  The shift operation detection unit 3 detects the shift operation of the dog transmission based on an input signal from the shift operation switch 12 that carries information regarding the shift operation when the driver performs the shift operation of the dog transmission. . The shift operation detection unit 3 inputs an electrical signal according to the presence or absence of the shift operation of the dog transmission detected in this way to the control unit 5.

  The gear position detection unit 4 outputs a dog based on a signal corresponding to the gear position (gear position) selected by the dog transmission corresponding to the rotational position of the shift drum of the dog transmission output from the gear position sensor 13. Detects the gear stage selected in the transmission. The gear position detection unit 4 inputs an electric signal indicating the detected gear position to the control unit 5.

  Based on the input signal from the gear position detection unit 4, the control unit 5 detects the gear shift operation of the dog transmission while the clutch state detection unit 2 detects the connection of the main clutch. When it is determined that the gear stage of the dog transmission has been switched, the throttle valve opening (throttle opening) of the engine driven by the throttle motor 14, that is, the actual throttle opening that is the actual throttle opening is raised to a power This is controlled so as to change toward the required throttle opening required by the accelerator operation of the type vehicle. The control unit 5 inputs a control signal for adjusting the throttle opening in this way to the motor drive circuit 6.

  Here, the control unit 5 further uses the input signals from the throttle position sensor 15, the accelerator opening sensor 16, and the crank angle sensor 17 to execute a driving force control process described later. The throttle position sensor 15 inputs an electrical signal corresponding to the throttle opening of the engine. The accelerator opening sensor 16 inputs an electric signal corresponding to an operation amount (accelerator opening) of an accelerator operating member such as an accelerator grip of a saddle riding type vehicle. The crank angle sensor 17 inputs an electric signal corresponding to the crank angle (crankshaft rotation angle) of the engine.

  The motor drive circuit 6 controls the throttle opening by driving the throttle motor 14 in accordance with a control signal from the control unit 5.

  The driving force control apparatus 1 having the above-described configuration suppresses the occurrence of a torque shock after the completion of shifting by executing the following driving force control process. Hereinafter, the operation of the driving force control apparatus 1 when executing the driving force control process will be described in detail with reference to FIGS. 2 to 4.

[Driving force control processing]
FIG. 2 is a flowchart showing the flow of the driving force control process by the driving force control apparatus in the present embodiment. FIG. 3 is a diagram illustrating a time change of the throttle opening accompanying a shift-up operation when the driving force control process by the driving force control device in the present embodiment is executed. FIG. 4 is a diagram showing a change over time in the target throttle opening accompanying a shift-down operation when the driving force control process is executed by the driving force control apparatus according to the present embodiment. 3 and 4, the characteristic line L1 indicates the throttle opening, and the characteristic line L2 indicates the throttle opening corresponding to the accelerator opening detected by the accelerator opening sensor 16 (the requested throttle required by the driver). Opening), a characteristic line L3 indicates the gear position of the dog transmission, and a characteristic line L4 indicates whether or not the dog transmission is operated.

  The flowchart shown in FIG. 2 starts when the ignition switch of the saddle riding type vehicle is turned on and the driving force control device 1 is activated, and the driving force control process proceeds to step S1. The driving force control process is repeatedly executed every predetermined control period while the straddle-type vehicle is activated and the driving force control device 1 is activated.

  In the process of step S1, the control unit 5 is in a state where the clutch state detection unit 2 detects the connection of the main clutch based on the electric signals input from the clutch state detection unit 2 and the shift operation detection unit 3. It is determined whether or not the shift operation detection unit 3 has detected a shift operation of the dog transmission. As a result of the determination, in a state where the clutch state detection unit 2 detects the connection of the main clutch, if the shift operation detection unit 3 has not detected the shift operation of the dog transmission, the control unit 5 A series of driving force control processing ends. On the other hand, when the shift operation detection unit 3 detects a shift operation of the dog transmission while the clutch state detection unit 2 detects the connection of the main clutch, the control unit 5 performs a driving force control process. The process proceeds to S2.

  Here, at the time t = t1 shown in FIG. 3 and the time t = t5 shown in FIG. 4, the shift operation detecting unit 3 is connected to the dog type transmission while the clutch state detecting unit 2 detects the connection of the main clutch. A shift operation is detected.

  In step S2, the control unit 5 determines whether or not the initial opening of the throttle opening of the engine has been calculated based on the flag information stored in the memory. If the initial opening degree has been calculated as a result of the determination, the control unit 5 advances the driving force control process to the process of step S5. On the other hand, when the initial opening degree has not been calculated, the control unit 5 advances the driving force control process to the process of step S3.

  In the process of step S3, the control unit 5 detects the engine rotation speed (engine rotation speed) NE based on the electrical signal corresponding to the crank angle of the engine input by the crank angle sensor 17, and the engine thus detected. Based on the rotational speed NE, the initial opening of the engine throttle opening is calculated, and flag information indicating that the initial opening has been calculated is stored in the memory. Thereby, the process of step S3 is completed and a driving force control process progresses to the process of step S4.

  Here, the initial opening is preferably set to an opening value that matches the throttle opening corresponding to the no-load line from the viewpoint of further improving the ease of shifting operation. Here, the opening value corresponding to the throttle opening corresponding to the no-load line is not only to realize a state in which the dogs are merely in contact with each other without being separated or pressed, but the dogs can be separated from each other. What implement | achieves the state which has pressed each other gently in the state may also be included. In other words, the opening value corresponding to the throttle opening corresponding to the no-load line may include not only a value that exactly matches the throttle opening but also a value that is shifted up and down by about several degrees. The initial opening may be corrected for the environment based on the atmospheric temperature, atmospheric pressure, engine lubricating oil temperature, and engine coolant temperature, if necessary.

  Such a no-load line indicates an engine operating state in which the driving force of the engine is balanced with its resistance (mechanical frictional force, viscoelastic force of lubricating oil, etc.). It consists of characteristic data indicating the operating state of the engine that can release the engagement between the dogs of the dog type transmission with the rotation speed and the throttle opening as parameters, and is preset and stored in the memory. Specifically, the no-load line defines the boundary of the engine operating state where the engagement state between the dogs of the dog-type transmission switches between the engagement state during deceleration and the engagement state during acceleration. It defines the relationship between the engine speed and the throttle opening in a state in which the dogs are in contact with each other without being separated or pressed, and in a state in which the dogs are detachably pressed against each other. is there. That is, the no-load line is not only a simple line but also a region extending with a certain vertical width including the straight line in the orthogonal coordinate system having the engine rotation speed and the throttle opening as the respective coordinate axes. Further, the throttle opening TH0 shown in FIGS. 3 and 4 exemplifies a representative value of the throttle opening in a region corresponding to such a no-load line.

  In the process of step S4, the control unit 5 sets the target throttle opening of the engine to the initial opening calculated in the process of step S3. Thereby, the process of step S4 is completed and a driving force control process progresses to the process of step S5.

  Here, at time t = t1 shown in FIG. 3 and time t = t5 shown in FIG. 4, the control unit 5 sets the target throttle opening of the engine to the initial opening TH1.

  In the process of step S5, the control unit 5 controls the motor drive circuit 6 so that the throttle opening of the engine approaches the target throttle opening set in the process of step S4. As a result, the throttle valve is driven by the throttle motor 14 driven by the drive signal from the motor drive circuit 6 while being feedback controlled so that the actual throttle opening approaches and matches the target throttle opening. The degree follows the target throttle opening. Thereby, the process of step S5 is completed and a driving force control process progresses to the process of step S6.

  In the process of step S6, the control unit 5 determines whether or not the gear stage of the dog transmission detected by the gear stage detection unit 4 has been switched based on the electric signal input from the gear stage detection unit 4, that is, the gear shift. It is determined whether or not is completed. As a result of the determination, if the gear shift of the dog type transmission detected by the gear speed detection unit 4 is not switched and the gear shift is not completed, the control unit 5 ends the current series of driving force control processes. . On the other hand, when the gear position of the dog transmission detected by the gear position detection unit 4 is switched and the gear shift is completed, the control unit 5 advances the driving force control process to the process of step S7. It should be noted that a measurement process for a predetermined time by a subtraction timer may be added in order to supplement the process for determining whether the shift is complete.

  Here, at time t = t2 shown in FIG. 3 and time t = t6 shown in FIG. 4, the control unit 5 completes the shift of the dog transmission based on the electric signal input from the gear position detection unit 4. Is determined.

  In step S7, the control unit 5 controls the motor drive circuit 6 so that the target throttle opening of the engine is maintained at the predetermined opening TH2 for a predetermined time. Then, after the predetermined time has elapsed, the control unit 5 brings the target throttle opening closer to the required throttle opening required by the accelerator operation of the saddle riding type vehicle based on the electric signal input from the accelerator opening sensor 16. Next, merge processing for controlling the motor drive circuit 6 is executed. By such a throttle opening return process, the process of step S7 is completed, and the current series of driving force control processes ends.

  Here, the predetermined opening TH2 is set to a throttle opening between the target throttle opening of the engine and the required throttle opening at the time when the gear stage of the dog transmission is switched. That is, the predetermined opening TH2 is set to a throttle opening between the throttle opening corresponding to the no-load line and the requested throttle opening. Further, the throttle opening (actual throttle opening) of the engine at the time when the gear position is switched in this way substantially matches the target throttle opening set to the initial opening TH1.

  At this time, the predetermined opening TH2 is preferably set in a range that does not exceed the amount of change in the intake air amount that causes a change in the driving force of the engine that causes acceleration / deceleration in the saddle riding type vehicle. As a result, the dogs of the dog type transmission are pressed against the driving wheel side or the engine side by the driving force of the engine according to the throttle opening corresponding to the predetermined opening TH2, and the pressing force is from the dog type transmission to the road surface. It is absorbed by the response system and falls within a range where acceleration / deceleration is not caused in the saddle riding type vehicle. For example, when the shift operation of the dog transmission is a shift-up operation (a shift operation that changes the shift stage from the lower shift stage to the upper shift stage), the throttle opening TH0 corresponding to the no-load line is set to a larger value side. If the throttle opening is more than a few degrees, and the shift-down operation is a shift operation that changes the gear position from the upper gear to the lower gear, the throttle opening TH0 corresponding to the no-load line is set to a smaller value. It is desirable to use a throttle opening that exceeds several degrees as the predetermined opening TH2.

  Further, when executing the merge process, it is desirable that the control unit 5 controls the motor drive circuit 6 so as to change the throttle opening of the engine while being inclined with respect to the passage of time.

  Here, in the period after time t = t3 shown in FIG. 3 and the period after time t = t7 shown in FIG. 4, the motor drive circuit is configured so that the control unit 5 returns the throttle opening to the required throttle opening. 6 is executed. Further, in FIG. 3, since the shift operation is shown as a shift-up operation, the throttle opening during the merge process is increased as a typical example, and in FIG. 4, the shift operation is shown as a shift-down operation. The throttle opening during the merge process is reduced as a typical example. It should be noted that the throttle opening in the merging process may change linearly or may change curvedly.

  As is clear from the above description, in the driving force control apparatus 1 in the present embodiment, when a shift operation of the dog transmission is detected in a state where the connection of the main clutch is detected, the dog of the dog transmission is detected. The drive force is temporarily changed by causing a temporary change in the throttle opening by controlling the motor drive unit 6 so that the dog-type transmission can be shifted by releasing or weakening the engagement between them. In response to the change of the gear position of the dog transmission detected by the gear position detection unit 4, the control unit 5 causes the throttle opening to change from a predetermined opening to a direction in which the temporary change in the throttle opening converges. Since the motor drive unit 6 is controlled so as to be changed, a torque shock is generated after the shift is completed. It is possible to win.

  Further, in the driving force control apparatus 1 according to the present embodiment, the control unit 5 changes the motor so that the temporary change of the throttle opening converges while the throttle opening is inclined with respect to the passage of time. Since it controls the drive part 6, it can suppress more reliably that a torque shock generate | occur | produces after the completion of gear shifting.

  Further, in the driving force control apparatus 1 according to the present embodiment, the control unit 5 changes the throttle opening from a predetermined opening to a straddle-type vehicle in response to the shift stage detected by the shift stage detection unit 4 being switched. Since the motor drive unit 6 is controlled so as to change toward the required throttle opening required by the accelerator operation, it is possible to more reliably suppress the occurrence of torque shock after the completion of the shift.

  Further, in the driving force control apparatus 1 in the present embodiment, after the control unit 5 maintains the throttle opening at the predetermined opening TH2 between the throttle opening and the required throttle opening at the time when the gear position is switched. Since the motor drive unit 6 is controlled so as to change the throttle opening toward the required throttle opening, it is possible to reduce the impact caused by the collision between the dogs during the shift, and the torque shock after the shift is completed. Can be more reliably suppressed.

  Further, in the driving force control apparatus 1 according to the present embodiment, a no-load line indicating the engine operating state in which the dogs can be disengaged is set in advance, and the predetermined opening TH2 is the throttle opening corresponding to the no-load line. Since the opening value is set between the degree TH0 and the required throttle opening, the driver requests the driving behavior of the saddle type vehicle while suppressing the occurrence of torque shock after the completion of the shift. You can get close to things.

  In the present invention, the type, shape, arrangement, number, and the like of the members are not limited to the above-described embodiment, and the gist of the invention is appropriately replaced such that the constituent elements are appropriately replaced with those having the same operational effects. Of course, it can be changed as appropriate without departing from the scope.

  As described above, the present invention can provide a driving force control device capable of suppressing the occurrence of a torque shock after completion of a shift, and the driving force control device for a vehicle or the like due to its general-purpose character. It is expected that it can be widely applied to.

DESCRIPTION OF SYMBOLS 1 ... Driving force control apparatus 2 ... Clutch state detection part 3 ... Shift operation detection part 4 ... Shift speed detection part 5 ... Control part 6 ... Motor drive circuit 11 ... Clutch switch 12 ... Shift operation switch 13 ... Gear position sensor 14 ... Throttle Motor 15 ... Throttle position sensor 16 ... Accelerator opening sensor 17 ... Crank angle sensor

Claims (5)

A clutch state detection unit for detecting connection or disconnection of the main clutch, which is mounted on a straddle-type vehicle that transmits engine driving force to driving wheels through a main clutch and a dog type transmission in order, and a shift of the dog type transmission A shift operation detection unit that detects an operation, a motor drive unit that drives a motor that changes the throttle opening of the engine, and the shift operation detection in a state where the clutch state detection unit detects the connection of the main clutch. The motor drive unit so that the dog-type transmission can be shifted when the dog-type transmission detects the shift operation of the dog-type transmission by disengaging or weakening the dogs of the dog-type transmission. Temporary change in the throttle opening by controlling A control unit for temporarily changing the driving force causing a drive force control apparatus comprising,
A gear position detector for detecting a gear position of the dog transmission,
The control unit changes the throttle opening from a predetermined opening to a direction in which the temporary change of the throttle opening converges in response to switching of the gear detected by the gear detection unit. The driving force control apparatus characterized by controlling the motor driving unit.   The control unit controls the motor driving unit to change the throttle opening in the direction in which the temporary change of the throttle opening converges while tilting the throttle opening with the passage of time. The driving force control apparatus according to claim 1.   The control unit is configured to change the throttle opening from the predetermined opening to the required throttle opening requested by an accelerator operation of the saddle riding type vehicle in response to switching of the gear detected by the gear detection unit. The driving force control device according to claim 1, wherein the motor driving unit is controlled so as to change toward a degree.   The control unit maintains the throttle opening at the predetermined opening between the throttle opening and the requested throttle opening at the time when the shift speed is changed, and then sets the throttle opening to the requested throttle. The driving force control apparatus according to claim 3, wherein the motor driving unit is controlled so as to change toward an opening degree. A no-load line indicating the operating state of the engine capable of releasing the engagement between the dogs is preset,
5. The driving force control apparatus according to claim 4, wherein the predetermined opening is set to an opening value between the throttle opening corresponding to the no-load line and the required throttle opening.

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