JP6247468B2 - Engine control device - Google Patents

Description

  The present invention relates to an engine control device, and more particularly to an engine 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, A shift operation 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 pull the dogs apart for the shifting operation, a large static frictional force proportional to the pressing force acts on the contact surface. It tends to be difficult.

  Under such circumstances, Patent Document 1 relates to a motorcycle shift control device. When a shift operation is detected in a state in which one of an engine and a drive wheel drives the other, the throttle opening degree is electronically controlled. The structure which cancels | releases the contact of dogs temporarily by changing the driving force of an engine by changing is disclosed.

Japanese Patent No. 4392794

  However, according to the study of the present inventor, in the configuration of Patent Document 1, when a shift operation is detected in a state where one of the engine and the driving wheel drives the other, the throttle opening degree is abruptly increased. There is a possibility that the engine output is changed, and correspondingly, the output of the engine rapidly changes and the drivability tends to decrease.

  The present invention has been made after the above-described studies. When adjusting the contact state between the dogs during gear shifting of the dog type transmission, the intake air amount of the engine caused by a sudden change in the throttle opening is determined. An object of the present invention is to provide an engine control device capable of suppressing a rapid change in engine output due to a rapid change.

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, and the shift operation detection unit in the state that the clutch state detection unit detects the connection of the main clutch. When the shift operation of the engine is detected, the throttle opening of the engine is temporarily set so that the dog-type transmission can be shifted by releasing or weakening the dogs of the dog-type transmission. Control to change the engine output temporarily by changing A control unit that detects a shift stage of the dog transmission, and a shift completion detection unit that detects completion of the shift of the dog transmission based on a change in the shift stage. The engine control device is in a first state in which the dog on the drive wheel side drives the dog on the engine side, or the dog on the engine side drives the dog on the drive wheel side. A dog engagement state estimation unit that estimates whether the second state is in the second state, and the control unit performs the first control to change the throttle opening temporarily . together when the a state was estimated to hold increasing the throttle opening to a first predetermined value, the throttle when the said is a second state is estimated Executing a first control for holding the degree by reducing the second predetermined value, when the shift change completion detection unit during the execution of the first control detects the completion of the transmission of the dog type transmission The first control is terminated and the first control is executed before the shift completion detecting unit detects the completion of the shift of the dog transmission during the execution of the first control. Is maintained for a predetermined period of time, when it is estimated that the first state is established, the throttle opening is increased from the first predetermined value and held, and the second state is established. When estimated , the first aspect is to execute the first control while maintaining the throttle opening reduced from the second predetermined value .

In the present invention, in addition to the first aspect, when the control unit executes the control for temporarily changing the throttle opening, the first state is estimated and the speed change operation is performed. Is shifted down, the first control for increasing and holding the throttle opening to the first predetermined value is executed, and the completion of the shift during the execution of the first control. In the case where the execution of the first control continues for the predetermined time before the first is detected, the first control for increasing and holding the first predetermined value is executed to execute the first control of the engine. The second aspect is to change the output in the increasing direction.

According to the present invention, in addition to the first or second aspect, the control unit changes the throttle opening so as to approach a target throttle opening, and the shift of the shift during the execution of the first control is performed. If completion of the first control continues for the predetermined time before completion is detected, and the target throttle opening reaches a limit opening, the first control is terminated. A third aspect is assumed.

The present invention, in addition to such a third aspect, the limit opening, the dog of the engine side of the throttle opening and the drive wheel side of the engine in driving the dog of the driving wheel-side the dog is a fourth aspect to be set to the throttle opening of the engine between the throttle opening of the engine when driving the dog of the engine side.

According to the first aspect of the present invention, the driving wheel side dog is in the first state driving the engine side dog, or the engine side dog is driving the driving wheel side dog. A dog engagement state estimation unit for estimating whether the state is in the second state is further provided, and the shift operation detection unit detects a shift operation of the dog transmission while the clutch state detection unit detects the connection of the main clutch. In this case, the engine output is temporarily changed by temporarily changing the throttle opening of the engine so that the dog-type transmission can be shifted by releasing or weakening the dog-type transmission. controlling unit for performing control to change, in executing the control temporarily changing the throttle opening degree, it is estimated in a first state Sometimes holds by increasing the throttle opening to a first predetermined value, the first control when it is estimated in the second state is to be held by decreasing the throttle opening to a second predetermined value When the shift completion detection unit detects completion of the shift of the dog transmission during execution of the first control, the first control is terminated, and the shift completion detection unit is executed during execution of the first control. If the execution of the first control continues for a predetermined time before detecting the completion of the shift of the dog transmission, the throttle opening is set to the first predetermined value when it is estimated that the first state is established. holds is increased from, by executing a first control hold reduces the throttle opening from the second predetermined value when it is estimated in the second state, the dog-type transformer mission When adjusting the contact state between dogs during gear shifting, the engine output is prevented from changing suddenly due to a sudden change in the intake air amount of the engine due to a sudden change in the throttle opening. can do. In particular, if the shift is not completed even after a long time has elapsed since the detection of the shift operation, the throttle opening is changed stepwise, so that the engine output is reduced by a sudden change in the throttle opening during the shift. A sudden change can be suppressed.

According to the second aspect of the present invention, when the speed change operation is downshifting , the first state is estimated when the control unit executes control for temporarily changing the throttle opening degree, When the shift operation is downshift, the first control for increasing the throttle opening to the first predetermined value and holding it is executed, and the completion of the shift is detected during the execution of the first control. before being, when the execution of the first control continues for a predetermined time, changes the output of the engine in the increasing direction by performing a first control to maintain increases the first predetermined value Thus, in a state where the driving wheel side dog pushes and drives the engine side dog (dog tooth), the driving wheel side dog can be driven in the direction of pulling away the engine side dog (dog tooth).

According to the third aspect of the present invention, the control unit changes the throttle opening so as to approach the target throttle opening, and before the completion of the shift is detected during the execution of the first control , When the execution of the control No. 1 continues for a predetermined time and the target throttle opening reaches the limit opening, the first control is terminated, so that the dog on the drive wheel side and the dog on the engine side Even when it is difficult to complete shifting of the dog-type transmission due to the fact that there is a large variation in the friction force between them, or when the output of the engine is uneven and it is difficult to increase, It is possible to suppress a sudden increase in the target throttle opening, to suppress a sudden increase in the intake air amount of the engine, and to suppress a rapid change in its output.

According to a fourth aspect of the present invention, the limit opening, the dog of the throttle position and the drive wheel side of the engine when the dog of the engine side drives the dog of the driving wheel drives the dog on the engine side by setting the engine throttle opening between the throttle opening of the engine when, even if the current engine control process by operating the gear shift switch incorrectly driver is started, the straddle-type Rapid acceleration of the vehicle can be suppressed.

It is a block diagram which shows the structure of the engine control apparatus in embodiment of this invention. FIG. 2A is a flowchart showing the flow of engine control processing in the present embodiment, and FIG. 2B is a limit opening THlim1 (the target throttle opening THtrg used in the flowchart of FIG. 2A). 3 is graph data showing a load line at each gear stage of a dog transmission for setting an upper limit value. FIG. 3A is a flowchart showing a continuation of the engine control process shown in FIG. 2A, and FIG. 3B is a diagram showing the limit opening of the target throttle opening THtrg used in the flowchart of FIG. It is graph data which shows the load line in each gear stage of the dog type transmission for setting degree THlim2 (lower limit). It is a timing chart for demonstrating the engine control process in this embodiment, and respond | corresponds to the flowchart of the engine control process shown in FIG.

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

[Configuration of engine control unit]
First, with reference to FIG. 1, the structure of the engine control apparatus in embodiment of this invention is demonstrated.

  FIG. 1 is a block diagram showing the configuration of the engine control apparatus in the present embodiment.

  As shown in FIG. 1, an engine control device 1 according to the present embodiment is configured by an electronic control device such as an ECU (Electronic Control Unit), and the engine control device 1 is 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 driving force to driving wheels.

  The engine control device 1 includes a shift operation detection unit 2, a clutch state detection unit 3, a rotation speed detection unit 4, a shift speed / shift completion detection unit 5, a dog engagement state estimation unit 6, a control unit 7, and a throttle motor drive circuit. 8 is provided. The shift operation detection unit 2, the clutch state detection unit 3, the rotation speed detection unit 4, the shift speed / shift completion detection unit 5, the dog engagement state estimation unit 6, and the control unit 7 are shown as functional blocks, respectively. The control device 1 includes a memory or the like not shown.

Specifically, the shift operation detection unit 2 detects an input signal from the gear shift switch 10 that carries information related to the shift operation when the driver shifts the dog transmission, thereby detecting the dog transmission. Detects shifting operation. Shift operation detection unit 2
Inputs an electric signal corresponding to the presence or absence of a shifting operation of the dog transmission to the control unit 7.

  The clutch state detection unit 3 detects connection or disconnection of 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. The clutch state detection unit 3 inputs an electric signal corresponding to the main clutch on / off operation to the control unit 7.

  The rotational speed detector 4 detects the rotational speed NE of the engine based on an electrical signal corresponding to the crank angle of the engine (the rotational angle of the crankshaft) output from the crank angle sensor 12. The rotation speed detection unit 4 inputs an electric signal indicating the detected engine rotation speed NE to the dog engagement state estimation unit 6 and the control unit 7.

  The gear position / shift completion detection unit 5 is 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. Then, the shift stage selected by the dog transmission is detected and the completion of the shift is detected. The shift speed / shift completion detection unit 5 inputs an electrical signal indicating the detected shift speed and an electrical signal indicating the completion of the shift to the control unit 7. Note that the function of detecting the shift speed and the function of detecting the completion of the shift in the shift speed / shift completion detecting unit 5 may be realized by separate functional blocks.

  The dog engagement state estimation unit 6 estimates whether the driving wheel is in an operating state in which the engine is driving in the straddle-type vehicle or in an operating state in which the engine is driving the driving wheel. Here, typically, in a straddle-type vehicle, when the driving wheels are driving the engine, the engine output is relatively small in the straddle-type vehicle such as during deceleration traveling, and the engine This corresponds to the case where the dog on the driving wheel side in the dog transmission is in the state of driving the dog on the engine side, corresponding to the driving state in which the engine does not function as a driving source and travels with inertial force or the like. In addition, in a saddle riding type vehicle, when the engine is in a driving state where driving wheels are being driven, in a saddle riding type vehicle such as during acceleration running, the engine output is relatively large and the engine functions as a drive source. This corresponds to the case where the engine-side dog in the dog-type transmission is in the state of driving the dog on the drive wheel side, corresponding to the driving state being exhibited. Such an estimation process by the dog engagement state estimation unit 6 is based on the opening degree (throttle opening amount) of the throttle engagement state estimation unit 6 when the throttle motor 15 is driven in the throttle valve provided in the intake system of the engine. Accordingly, based on the electrical signal output from the throttle opening sensor 14 and the electrical signal output from the crank angle sensor 12 according to the crank angle of the engine, the engine rotational speed NE detected by the rotational speed detection unit 4 is obtained. It is preferable that each of the electrical signals shown is read and performed based on the signals because highly accurate practical estimation can be realized. The dog engagement state estimation unit 6 inputs an electric signal indicating that the estimated driving wheel is driving the engine or the engine is driving the driving wheel to the control unit 7.

  When the driving wheel estimated by the dog engagement state estimation unit 6 is in an operating state where the engine is driven, and the engine estimated by the dog engagement state estimation unit 6 is driving the driving wheel. When the shift operation detection unit 2 detects a shift operation of the dog transmission in a state where the clutch state detection unit 3 detects the connection of the main clutch, in response to each of the driving states, The throttle opening degree by driving the throttle motor 15 is adjusted so that the dogs can be disengaged or weakened so that shifting can be performed, and this is controlled so as to temporarily change the engine output. The control unit 7 inputs a control signal for adjusting the throttle opening in this way to the throttle motor drive circuit 8.

  The throttle motor drive circuit 8 controls the throttle opening by driving the throttle motor 15 in accordance with a control signal from the control unit 7.

  The engine control apparatus 1 having the above-described configuration performs the engine control process shown below, so that the throttle opening when adjusting the contact state between the dogs when the dog-type transmission is shifted changes rapidly. As a result, it is possible to suppress a rapid change in the engine output accompanying a rapid change in the intake air amount of the engine. Hereinafter, the operation of the engine control apparatus 1 when executing the engine control process will be described in detail with reference to FIGS.

[Engine control processing]
FIG. 2A is a flowchart showing the flow of engine control processing in the present embodiment, and FIG. 2B is a limit opening THlim1 (the target throttle opening THtrg used in the flowchart of FIG. 2A). 3 is graph data showing a load line at each gear stage of a dog transmission for setting an upper limit value. FIG. 3A is a flowchart showing a continuation of the engine control process shown in FIG. 2A, and FIG. 3B is a diagram showing the target throttle opening THtrg used in the flowchart of FIG. It is graph data which shows the load line in each gear stage of the dog type transmission for setting limit opening degree THlim2 (lower limit). FIG. 4 is a timing chart for explaining the engine control process in the present embodiment, and corresponds to the flowchart of the engine control process shown in FIG. Note that the number of shift speeds in FIGS. 2B and 3B is an example.

  The flowcharts shown in FIGS. 2 (a) and 3 (a) are started when the straddle-type vehicle is started and the engine control device 1 is started, and the engine control process proceeds to step S1.

  In the process of step S1, the shift operation detection unit 2 reads an input signal from the gear shift switch 10 that carries information regarding the presence or absence of a shift operation of the dog transmission. Thereby, the process of step S1 is completed and the engine control process proceeds to the process of step S2.

  In the process of step S2, the shift operation detecting unit 2 determines whether or not the input signal read by the process of step S1 has changed from “0” to “1”. It is determined whether or not it has been detected. If the input signal has not changed as a result of the determination, the shift operation detection unit 2 determines that the shift operation of the dog transmission is not detected, and returns the engine control process to the process of step S1. On the other hand, when the input signal changes, the shift operation detection unit 2 determines that the shift operation of the dog transmission has been detected, and advances the engine control process to the process of step S3.

  In the process of step S3, the clutch state detection unit 3 reads an input signal from the clutch switch 11 carrying information on connection or disconnection of the main clutch. Thereby, the process of step S3 is completed and the engine control process proceeds to the process of step S4.

  In the process of step S4, the clutch state detection unit 3 determines whether the value of the input signal read by the process of step S3 is “0” or “1”, so that the main clutch is connected or disconnected. Judge whether it has been. As a result of such determination, when the value of the input signal is “0”, the clutch state detection unit 3 determines that the main clutch is disengaged, and returns the engine control process to the process of step S1. On the other hand, when the value of the input signal is “1”, the clutch state detection unit 3 determines that the main clutch is engaged, and advances the engine control process to the process of step S5.

  In the process of step S5, the dog engagement state estimation unit 6 is in a driving state in which the driving wheel is driving the engine in the saddle riding type vehicle, or is in a driving state in which the engine is driving the driving wheel. It is estimated. As a result of the estimation process, when it is estimated that the driving wheel is in the driving state driving the engine, the dog engagement state estimation unit 6 advances the engine control process to the process of step S6. On the other hand, when it is estimated that the engine is in the driving state where the driving wheels are being driven, the dog engagement state estimation unit 6 advances the engine control process to the process of step S23. Here, the estimation process is performed, for example, when the dog engagement state estimation unit 6 outputs an electric signal corresponding to the throttle opening output from the throttle opening sensor 14 and the engine rotation speed detected by the rotation speed detection unit 4. The electric signal indicating NE is read, and the point (operating state) defined by the throttle opening TH and the engine speed NE in FIG. 2B is the no-load line (shown in FIG. 2B). If the engagement state between the dogs is a line that switches between the engagement state at the time of deceleration and the engagement state at the time of acceleration) If it is in the lower region of no, the driving wheel is in the driving state driving the engine. In the future, the engine control process will proceed to a process that temporarily increases the engine output. On the other hand, if the point defined by the throttle opening TH and the engine speed NE in FIG. 2B is in the upper region of the no-load line no shown in FIG. It is presumed that the vehicle is in a driving operation state, and in the future, the engine control process will proceed to a process for temporarily reducing the engine output. In addition, when the point prescribed | regulated by these throttle opening TH and engine rotational speed NE in FIG.2 (b) is located on the no-load line no shown in FIG.2 (b), it will be any as needed. What is necessary is just to estimate that it is in the driving state. The graph data shown in FIG. 2 (b) was stored in the memory of the engine control device.

  In the process of step S6, the rotational speed detection unit 4 detects the rotational speed NE of the engine based on the electrical signal corresponding to the crank angle of the engine output from the crank angle sensor 12, and the engine rotation thus detected is detected. An electric signal indicating the speed NE is input to the control unit 7. Thereby, the process of step S6 is completed and the engine control process proceeds to the process of step S7. In the process of step S5, the rotational speed detection unit 4 has already detected the rotational speed NE of the engine and inputs an electric signal indicating it to the dog engagement state estimation unit 6 and also to the control unit 7. If so, the process of step S6 can be omitted.

  In the process of step S7, the control unit 7 calculates the initial opening TH1 of the throttle opening (> current target throttle opening) based on the engine speed NE detected by the process of step S6. Thereby, the process of step S7 is completed, and the engine control process proceeds to the process of step S8.

  In the process of step S8, the control unit 7 sets the target throttle opening THtrg to the initial opening TH1 calculated by the process of step S7 (time t = t1 and t5 shown in FIG. 4). Thereby, the process of step S8 is completed, and the engine control process proceeds to the process of step S9.

  In step S9, the gear position / shift completion detection unit 5 detects the gear stage GP selected by the dog transmission based on the output signal of the gear position sensor 13, and the control unit 7 Based on the gear stage GP detected in this way by the shift completion detecting unit 5, the time-up time Tlim of the timer T for measuring the throttle opening holding time is set to the time T1 (time t = t1 shown in FIG. 4). And t5). Thereby, the process of step S9 is completed, and the engine control process proceeds to the process of step S10.

In the process of step S10, the control unit 7 resets the measurement time of the timer T to 0 (time t = t1 and t5 shown in FIG. 4). Thereby, the process of step S10 is completed, and the engine control process proceeds to the process of step S11.

  In the process of step S11, the control unit 7 controls the throttle motor drive circuit 8 so as to maintain the throttle opening at the target throttle opening THtrg. The throttle motor drive circuit 8 controls the throttle opening to coincide with the target throttle opening THtrg by driving the throttle motor 15 in accordance with a control signal from the controller 7 (time t = t1 shown in FIG. 4). And t5). Thereby, the process of step S11 is completed and the engine control process proceeds to the process of step S12. Here, in such processing, the control unit 7 holds the throttle opening at the target throttle opening THtrg set to the initial opening TH1, so that the dog on the driving wheel pushes and drives the dog on the engine side. In this state, the engine side dog can be driven away from the drive wheel side dog.

  In the process of step S12, the control unit 7 increases the measurement time of the timer T by one. Thereby, the process of step S12 is completed and the engine control process proceeds to the process of step S13.

  In the process of step S13, the gear stage / shift completion detection unit 5 detects the gear stage GP selected by the dog transmission based on the output signal of the gear position sensor 13. Thereby, the process of step S13 is completed and the engine control process proceeds to the process of step S14.

  In the process of step S14, the gear position / shift completion detection unit 5 determines whether or not the shift of the dog transmission is completed based on the gear stage GP detected in the process of step S13. If the result of this determination is that the shifting of the dog transmission has not been completed, the control unit 7 advances the engine control process to the process of step S16. On the other hand, when the shifting of the dog transmission is completed (time t = t4 shown in FIG. 4), the control unit 7 advances the engine control process to the process of step S15. Here, in this process, for example, if the gear stage / shift completion detecting unit 5 has detected the gear stage GP in the process of step S13, it is determined that the shift of the dog transmission has been completed, and step S13. If the gear stage GP cannot be detected in this process, it is determined that the shift of the dog transmission is not completed. Such processing may be performed by the control unit 7.

  In the process of step S15, the control unit 7 quickly decreases the target throttle opening THtrg to the normal target throttle opening. The throttle motor drive circuit 8 controls the throttle opening to coincide with the normal target throttle opening by driving the throttle motor 15 in accordance with a control signal from the control unit 7. Thereby, the process of step S15 is completed and the engine control process returns to the process of step S1. Note that the normal target throttle opening is appropriately set by the control unit 7 in accordance with the opening of an accelerator operation member (not shown) of the saddle riding type vehicle during normal traveling.

  In the process of step S16, the control unit 7 determines whether or not the measured time of the timer T is equal to or longer than the time-up time Tlim set in the process of step S9. As a result of the determination, when the measured time of the timer T is less than the time-up time Tlim, the control unit 7 returns the engine control process to the process of step S11. On the other hand, when the measurement time of the timer T is equal to or greater than the time-up time Tlim, the control unit 7 advances the engine control process to the process of step S17 (time t = t2 and t6 shown in FIG. 4).

In the process of step S17, the control unit 7 sets the target throttle opening THtrg based on the engine speed NE detected in the process of step S6 and the gear stage GP of the dog transmission detected in the process of step S13. An increase amount ΔTHtrg1 is calculated (time t = t2 and t6 shown in FIG. 4). Thereby, the process of step S17 is completed, and the engine control process proceeds to the process of step S18.

  In the process of step S18, the control unit 7 calculates a value obtained by adding the amount of increase ΔTHtrg1 calculated in the process of step S17 to the target throttle opening THtrg as a new target throttle opening THtrg. The throttle motor drive circuit 8 controls the throttle opening so as to coincide with the target throttle opening THtrg thus set by driving the throttle motor 15 in accordance with a control signal from the control unit 7 (FIG. 4). Times shown t = t2 and t6). Thereby, the process of step S18 is completed and the engine control process proceeds to the process of step S19. Here, in such processing, the control unit 7 controls the throttle opening so as to coincide with the target throttle opening THtrg to which the increase amount ΔTHtrg1 is added, whereby the dog on the driving wheel side and the dog on the engine side are controlled. Even when it is difficult to complete shifting of the dog-type transmission due to the fact that there is a large variation in the friction force between them, or when the output of the engine is uneven and it is difficult to increase, It is possible to suppress the target throttle opening THtrg from being rapidly increased, to suppress a sudden increase in the intake air amount of the engine and to suppress a rapid change in its output.

  In the process of step S19, the shift speed / shift completion detection unit 5 detects the shift speed GP selected by the dog transmission based on the output signal of the gear position sensor 13, and the control unit 7 detects the shift speed / Based on the gear stage GP of the dog transmission detected in this way by the shift completion detection unit 5, the time-up time Tlim of the timer T that measures the holding time of the throttle opening is set to time T2 (<T1) ( Time t = t2 and t6) shown in FIG. Thereby, the process of step S19 is completed and the engine control process proceeds to the process of step S20. Here, in such processing, the control unit 7 sets a time-up time Tlim for controlling the throttle opening to the time T2 (<T1) so as to coincide with the target throttle opening THtrg to which the increase amount ΔTHtrg1 is added. If the friction force between the dog on the drive wheel side and the dog on the engine side is uneven and large, or if the output of the engine is uneven and it is difficult to raise it, etc. Even when it is difficult to complete the shifting of the dog transmission, the target throttle opening THtrg is suppressed from increasing rapidly, and the intake air amount of the engine is suppressed from increasing rapidly. Rapid changes can be suppressed.

  In the process of step S20, the control unit 7 resets the measurement time of the timer T to zero. Thereby, the process of step S20 is completed and the engine control process proceeds to the process of step S21.

In the process of step S21, the control unit 7 determines the target speed based on the engine rotational speed NE detected by the rotational speed detection unit 4 and the gear stage GP of the dog transmission detected by the gear stage / shift completion detection unit 5. A limit opening THlim1 (upper limit value) of the throttle opening THtrg is set. At this time, the control unit 7 sets the limit opening to a value between the throttle opening at which the engine drives the driving wheel and the throttle opening at which the driving wheel drives the engine at the detected engine speed NE. Set THlim1. Specifically, as shown in FIG. 2 (b), when the gear stage GP of the dog type transmission is the first speed, the control unit 7 determines that the first speed road line (when the gear stage is the first speed). In the region between 1st and no-load line (the line where the engagement state between the dogs switches between the engagement state during deceleration and the engagement state during acceleration) no. Is set to the limit opening THlim1. Similarly, when the gear stage GP of the dog-type transmission is 2nd speed or higher, the control unit 7 sets the limit opening THlim1 within a region sandwiched between the load lines 2nd... Set. Thereby, the process of step S21 is completed and an engine control process progresses to the process of step S22. Here, in such processing, the controller 7 determines a value between the throttle opening at which the engine drives the driving wheel and the throttle opening at which the driving wheel drives the engine at the engine speed NE thus detected. By setting the limit opening THlim1 at the same time, even if the driver erroneously operates the gear shift switch 10 and this time the engine control process is started, it is possible to prevent the straddle-type vehicle from being accelerated rapidly. be able to. In addition, what was memorize | stored in the memory of the engine control apparatus 1 is used for the graph data shown in FIG.2 (b).

  In the process of step S22, the control unit 7 determines whether or not the target throttle opening THtrg is greater than or equal to the limit opening THlim1 set in the process of step S21. If the result of this determination is that the target throttle opening THtrg is not greater than or equal to the limit opening THlim1, the control unit 7 returns the engine control process to the process of step S11 (time t = t3, t7 shown in FIG. 4). , T8). On the other hand, when the target throttle opening THtrg is greater than or equal to the limit opening THlim1 (time t = t9 shown in FIG. 4), the control unit 7 advances the engine control process to the process of step S15.

  On the other hand, in the process of step S23 advanced from the process of step S5, the rotational speed detection unit 4 determines the engine rotational speed NE based on the electrical signal corresponding to the crank angle of the engine output from the crank angle sensor 12. An electric signal indicating the detected engine speed NE is input to the control unit 7. Thereby, the process of step S23 is completed, and the engine control process proceeds to the process of step S24. In the process of step S5, the rotational speed detection unit 4 has already detected the rotational speed NE of the engine and inputs an electric signal indicating it to the dog engagement state estimation unit 6 and also to the control unit 7. If so, the process of step S23 can be omitted.

  In the process of step S24, the control unit 7 calculates the initial opening TH2 of the throttle opening (<current target throttle opening) based on the engine speed NE detected in the process of step S23. Thereby, the process of step S24 is completed and the engine control process proceeds to the process of step S25.

  In the process of step S25, the control unit 7 sets the target throttle opening THtrg to the initial opening TH2 calculated in the process of step S24. The throttle motor drive circuit 8 drives the throttle motor 15 in accordance with a control signal from the control unit 7 to control the throttle opening so as to coincide with the target throttle opening THtrg. Thereby, the process of step S25 is completed, and the engine control process proceeds to the process of step S26.

  In the process of step S26, the shift speed / shift completion detection unit 5 detects the shift speed GP selected by the dog transmission based on the output signal of the gear position sensor 13, and the control unit 7 detects the shift speed / Based on the gear stage GP of the dog transmission detected in this way by the shift completion detection unit 5, the time-up time Tlim of the timer T for measuring the holding time of the throttle opening is set to the time T3. Thereby, the process of step S26 is completed, and the engine control process proceeds to the process of step S27.

  In the process of step S27, the control unit 7 resets the measurement time of the timer T to zero. Thereby, the process of step S27 is completed, and the engine control process proceeds to the process of step S28.

In step S28, the control unit 7 controls the throttle motor drive circuit 8 so that the throttle opening is maintained at the target throttle opening THtrg. The throttle motor drive circuit 8 drives the throttle motor 15 in accordance with a control signal from the control unit 7 to control the throttle opening so as to coincide with the target throttle opening THtrg. Thereby, the process of step S28 is completed and the engine control process proceeds to the process of step S29. In this process, the control unit 7 holds the throttle opening at the target throttle opening THtrg set to the initial opening TH2, so that the engine-side dog pushes and drives the dog on the driving wheel side. In this state, the driving wheel side dog can be driven away from the engine side dog.

  In the process of step S29, the control unit 7 increases the measurement time of the timer T by one. Thereby, the process of step S29 is completed and the engine control process proceeds to the process of step S30.

  In step S30, the shift speed / shift completion detection unit 5 detects the shift speed GP selected by the dog transmission based on the output signal of the gear position sensor 13. Thereby, the process of step S30 is completed, and the engine control process proceeds to the process of step S31.

  In the process of step S31, the shift speed / shift completion detection unit 5 determines whether or not the shift of the dog transmission has been completed based on the shift speed GP detected in the process of step S30. If the result of this determination is that the shifting of the dog transmission has not been completed, the control unit 7 advances the engine control process to the process of step S33. On the other hand, when the shift of the dog transmission is completed, the control unit 7 advances the engine control process to the process of step S32. Here, in this process, for example, when the gear stage / shift completion detection unit 5 has detected the gear stage GP in the process of step S30, it is determined that the shift of the dog transmission has been completed, and step S30. If the gear stage GP cannot be detected in this process, it is determined that the shift of the dog transmission is not completed. Such processing may be performed by the control unit 7.

  In the process of step S32, the control unit 7 increases the target throttle opening THtrg to the normal target throttle opening quickly or gradually. The throttle motor drive circuit 8 controls the throttle opening to coincide with the normal target throttle opening by driving the throttle motor 15 in accordance with a control signal from the control unit 7. Thereby, the process of step S32 is completed and the engine control process returns to the process of step S1. Note that the normal target throttle opening is appropriately set by the control unit 7 in accordance with the opening of an accelerator operation member (not shown) of the saddle riding type vehicle during normal traveling.

  In the process of step S33, the control unit 7 determines whether or not the measured time of the timer T is equal to or longer than the time-up time Tlim set in the process of step S26. As a result of the determination, when the measured time of the timer T is less than the time-up time Tlim, the control unit 7 returns the engine control process to the process of step S28. On the other hand, when the measured time of the timer T is equal to or greater than the time-up time Tlim, the control unit 7 advances the engine control process to the process of step S34.

  In the process of step S34, the control unit 7 determines the target throttle based on the engine rotational speed NE detected by the rotational speed detection unit 4 and the detected gear type GP of the dog type transmission detected in the process of step S30. A decrease amount ΔTHtrg2 of the opening degree THtrg is calculated. Thereby, the process of step S34 is completed and the engine control process proceeds to the process of step S35.

In the process of step S35, the control unit 7 calculates a value obtained by subtracting the decrease amount ΔTHtrg2 calculated in the process of step S34 from the target throttle opening THtrg as a new target throttle opening THtrg. The throttle motor drive circuit 8 drives the throttle motor 15 in accordance with a control signal from the control unit 7 to control the throttle opening to coincide with the target throttle opening THtrg set in this way. Thereby, the process of step S35 is completed, and the engine control process proceeds to the process of step S36. Here, in such processing, the control unit 7 controls the throttle opening so as to coincide with the target throttle opening THtrg from which the decrease amount ΔTHtrg2 is subtracted, whereby the dog on the drive wheel side and the dog on the engine side are controlled. Even when it is difficult to complete gear shifting of the dog type transmission due to variations in the frictional force between them and when it is large, or due to variations in engine output that are difficult to reduce, It is possible to suppress the target throttle opening THtrg from being rapidly decreased, to suppress a rapid decrease in the intake air amount of the engine, and to suppress a rapid change in the output.

  In step S36, the gear position / shift completion detection unit 5 detects the gear stage GP selected by the dog transmission based on the output signal of the gear position sensor 13, and the control unit 7 Based on the gear stage GP of the dog transmission detected in this way by the shift completion detecting unit 5, the time-up time Tlim of the timer T for measuring the holding time of the throttle opening is set to time T4 (<T3). Thereby, the process of step S36 is completed and an engine control process progresses to the process of step S37. Here, in such processing, the control unit 7 sets a time-up time Tlim for controlling the throttle opening to the time T4 (<T3) so as to coincide with the target throttle opening THtrg from which the decrease amount ΔTHtrg2 is subtracted. If the frictional force between the dog on the drive wheel side and the dog on the engine side is uneven and large, or if the output of the engine is uneven and it is difficult to reduce it, etc. Even when it is difficult to complete gear shifting of the dog transmission, the target throttle opening THtrg is suppressed from decreasing rapidly, and the intake air amount of the engine is suppressed from decreasing rapidly. Rapid changes can be suppressed.

  In the process of step S37, the control unit 7 resets the measurement time of the timer T to zero. Thereby, the process of step S37 is completed, and the engine control process proceeds to the process of step S38.

In the process of step S38, the control unit 7 sets the target throttle opening THtrg based on the engine speed NE detected in the process of step S23 and the gear stage GP detected by the gear stage / shift completion detecting unit 5. The limit opening THlim2 (lower limit value) is set. At this time, similarly to the process of step S21, the control unit 7 determines the throttle opening degree at which the engine drives the driving wheel and the throttle opening degree at which the driving wheel drives the engine at the detected engine speed NE. The limit opening THlim2 is set to a value between. Specifically, as shown in FIG. 3B, when the gear stage GP of the dog-type transmission is at the first speed, the control unit 7 sets the first speed road line (when the gear stage is at the first speed). In the region between 1st and no-load line (the line where the engagement state between the dogs switches between the engagement state during deceleration and the engagement state during acceleration) no. Set the limit opening THlim2. Similarly, when the gear stage GP of the dog-type transmission is 2nd speed or higher, the control unit 7 sets the limit opening THlim2 in a region sandwiched between each load line 2nd... Set. The limit opening THlim2 is preferably set close to the no-load line no. Thereby, the process of step S38 is completed and the engine control process proceeds to the process of step S39. Here, in such processing, the controller 7 determines a value between the throttle opening at which the engine drives the driving wheel and the throttle opening at which the driving wheel drives the engine at the engine speed NE thus detected. By setting the limit opening THlim2 in this way, even if the driver accidentally operates the gear shift switch 10 and this time the engine control process is started, it is possible to prevent the straddle-type vehicle from being rapidly decelerated. be able to. Note that the graph data shown in FIG. 3B is the data stored in the memory of the engine control device 1.

  In the process of step S39, the control unit 7 determines whether or not the target throttle opening THtrg is equal to or smaller than the limit opening THlim2 set in the process of step S38. As a result of the determination, if the target throttle opening THtrg is not smaller than the limit opening THlim2, the control unit 7 returns the engine control process to the process of step S28. On the other hand, when the target throttle opening THtrg is equal to or smaller than the limit opening THlim2, the control unit 7 advances the engine control process to the process of step S32.

  According to the above-described configuration of the present embodiment, when the shift operation detecting unit 2 detects the shift operation of the dog transmission while the clutch state detecting unit 3 detects the connection of the main clutch, The engine output is temporarily changed by temporarily changing the throttle opening of the engine so that the dog-type transmission can be shifted by releasing or weakening the dogs. When the control unit 7 executes the control for temporarily changing the throttle opening, the control unit 7 executes the first control that changes and holds the throttle opening by a predetermined value, and performs a shift during the execution of the first control. When the completion detection unit 5 detects the completion of the shift of the dog transmission, the first control is terminated, and the shift completion detection is performed during the execution of the first control. When the execution of the first control continues for a predetermined time before the part 5 detects the completion of the shift of the dog transmission, the first control is executed by changing the predetermined value, thereby executing the dog-type transmission. When adjusting the contact state between dogs during gear shifting, the engine output is prevented from changing suddenly due to a sudden change in the intake air amount of the engine due to a sudden change in the throttle opening. can do. In particular, if the shift is not completed even after a long time has elapsed since the detection of the shift operation, the throttle opening is changed stepwise, so that the engine output is reduced by a sudden change in the throttle opening during the shift. A sudden change can be suppressed.

  When the shift operation is downshifting, the control unit 7 changes the output of the engine in the increasing direction during execution of the first control, so that the dog on the driving wheel pushes the dog on the engine side. In the driving state, it is possible to drive in a direction in which the dog on the engine side is pulled away from the dog on the drive wheel side.

  When the control unit 7 changes the throttle opening so as to approach the target throttle opening, and the target throttle opening reaches the limit opening during the execution of the first control, the first control is performed. If the frictional force between the dog on the drive wheel side and the dog on the engine side is large and large, or if the output of the engine is uneven and it is difficult to increase Even when it is difficult to complete the shifting of the dog type transmission, the target throttle opening is suppressed from increasing rapidly, and the intake air amount of the engine is suppressed from increasing rapidly. Can be suppressed.

  Further, the limit opening is set to a throttle opening between the throttle opening at which the engine drives the driving wheel and the throttle opening at which the driving wheel drives the engine, so that the driver erroneously changes the gear shift switch. Even when the engine 10 is operated or a foreign object hits the gear shift switch 10 and the current engine control process is started, it is possible to prevent the straddle-type vehicle from being accelerated rapidly.

  In the present invention, the type, arrangement, number, and the like of the members are not limited to the above-described embodiments, and the constituent elements thereof are appropriately replaced with those having the same operational effects, and the gist of the invention is not deviated. Of course, it can be appropriately changed within the range.

  As described above, according to the present invention, when adjusting the contact state between the dogs at the time of shifting the dog type transmission, accompanying the rapid fluctuation of the intake air amount of the engine due to the rapid change of the throttle opening degree. Therefore, it is possible to provide an engine control device capable of suppressing a sudden change in engine output, and it is expected that it can be widely applied to engine control devices for vehicles and the like due to its universality. Is done.

DESCRIPTION OF SYMBOLS 1 ... Engine control apparatus 2 ... Shift operation detection part 3 ... Clutch state detection part 4 ... Rotational speed detection part 5 ... Shift speed / shift completion detection part 6 ... Dog engagement state estimation part 7 ... Control part 8 ... Throttle motor drive circuit DESCRIPTION OF SYMBOLS 10 ... Gear transmission switch 11 ... Clutch switch 12 ... Crank angle sensor 13 ... Gear position sensor 14 ... Throttle opening sensor 15 ... Throttle motor

Claims (4)

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 detecting unit for detecting an operation; and when the shift operation detecting unit detects the shift operation of the dog transmission in a state where the clutch state detecting unit detects the connection of the main clutch, The engine output is temporarily changed by temporarily changing the throttle opening of the engine so that the dog-type transmission can be shifted by releasing or weakening the dog-type transmission. A control unit for executing control to be changed, and the dog-type transmitter A gear position detecting unit for detecting the Deployment gear, based on a change in the shift speed, an engine control device and a shift change completion detection unit for detecting the completion of the transmission of the dog type transmission,
The driving wheel side dog is in the first state driving the engine side dog, or the engine side dog is driving the dog on the driving wheel side. A dog engagement state estimation unit for estimating whether or not there is,
The controller is
When executing the control for temporarily changing the throttle opening, when it is estimated that the first state is established, the throttle opening is increased to a first predetermined value and held , and When it is estimated that the vehicle is in the second state, a first control is performed to reduce and hold the throttle opening to a second predetermined value ;
When the shift completion detecting unit detects the completion of the shift of the dog transmission during the execution of the first control, the first control is terminated.
Wherein before said shifting completion detecting unit during execution of the first control detects the completion of the transmission of the dog type transmission, when the execution of the first control continues for a predetermined time, the first When it is estimated that the throttle opening is increased, the throttle opening is increased from the first predetermined value and held. When it is estimated that the second state is estimated, the throttle opening is An engine control apparatus characterized in that the first control is executed while maintaining the predetermined value reduced . When the control unit executes the control for temporarily changing the throttle opening, and the first state is estimated and the shift operation is a downshift, the throttle opening Is increased to the first predetermined value and held , and before the completion of the shift is detected during the execution of the first control, the first control is executed . When the execution continues for the predetermined time, the output of the engine is changed in an increasing direction by executing the first control that increases and holds the first predetermined value. Item 4. The engine control device according to Item 1. The control unit changes the throttle opening so as to approach the target throttle opening, and before the completion of the shift is detected during execution of the first control, execution of the first control is performed. 3. The engine control device according to claim 1, wherein the first control is terminated when the predetermined throttle time continues and the target throttle opening reaches a limit opening. 4. The limit opening degree, when the said dog throttle opening of the engine and the drive wheel side when the dog of the engine side drives the dog of the driving wheel drives the dog of the engine-side The engine control device according to claim 3, wherein the engine throttle opening is set to a throttle opening of the engine between the throttle opening of the engine.

Images