JP5698298B2 - Driving force control device for saddle riding type vehicle, control method therefor, and saddle riding type vehicle - Google Patents

Description

  The present invention relates to a driving force control device that controls driving force from a driving source such as an engine, and a control method thereof, and more particularly, to driving force control for a saddle-type vehicle having a function of detecting an abnormality of the driving force control device. The present invention relates to an apparatus and a control method thereof.

  The electronic throttle valve controls the opening degree of the throttle valve by electronic control and adjusts the intake amount of the engine (internal combustion engine), so that low exhaust gas and low fuel consumption can be realized, and has already begun to be adopted in some passenger cars. .

  On the other hand, when adopting an electronic throttle valve for a motorcycle, a drive motor for controlling the opening of the throttle valve is arranged in a compact manner while avoiding interference with a fuel injection valve arranged in an intake passage. There must be. Therefore, although a compact electronic throttle control device that can be mounted on a motorcycle has been proposed in Patent Document 1 and the like, it has not yet been adopted due to such limitations inherent to motorcycles.

  By the way, this electronic throttle valve has a function of shutting down the driving of the throttle valve by the electronic motor and returning the throttle valve to the fully closed direction by the biasing force of the spring when any abnormality occurs in the control system. (See, for example, Patent Document 2).

  In order to execute such a function, a means for detecting that an abnormality has occurred in the control system for the electronic throttle valve is required. For example, the opening degree of the throttle valve is detected by a throttle sensor. In order to detect an abnormal output of the throttle sensor, the signal of the throttle sensor must be constantly monitored.

  By the way, even if the throttle sensor is normal, if a momentary abnormal signal is output due to noise or the like, it is actually determined that it is abnormal even though the normal state is immediately restored. There is.

  In order to eliminate the detection of such an instantaneous abnormal signal, the abnormality determination has a determination delay time longer than the signal width of noise or the like, and when the abnormal output continues this determination delay time, the abnormality is finally detected. Can be considered.

  However, with this method, even if the control system becomes abnormal, the control of the throttle valve based on the abnormal output is continued until the judgment delay time elapses. In this case, the behavior change of the vehicle may be increased.

  To solve this problem, when an abnormality is detected in the throttle sensor, the control amount of the throttle opening is set to a predetermined value (control during temporary abnormality), and the sensor abnormality is detected even if the judgment delay time has elapsed. Patent Document 3 describes a technique for stopping the throttle control while continuing to do so.

  According to this method, since the determination delay time is provided until the sensor abnormality is detected and the throttle control is stopped, abnormality detection due to an instantaneous abnormality signal due to noise or the like can be eliminated, and the determination delay can be eliminated. During the time, since the control amount of the throttle opening is fixed to a predetermined amount, the control of the throttle valve based on the instantaneous abnormal output of the throttle sensor can be avoided.

JP 2002-256895 A JP 2003-201886 A Japanese Patent Laid-Open No. 10-238389

  The method described in Patent Document 3 is excellent in that the reliability of the electronic throttle system can be improved. However, in the case of a temporary abnormality, a control different from the stop of the throttle control (a control amount of the throttle opening is set to a predetermined value). (Fixed to the value) is performed during the determination delay time, and therefore the behavior of the vehicle may change even if it is noise. In addition, if the vehicle is determined to be normal thereafter, the control is returned to the normal state, so that the behavior of the vehicle may also change.

  The present invention has been made in view of such points, and an object of the present invention is to provide a driving force control device for a straddle-type vehicle (motorcycle) that can suppress changes in behavior of the vehicle due to noise or the like.

  A driving force control device for a saddle-ride type vehicle according to the present invention is a driving force control device including a driving source and an abnormality detection unit that detects an abnormality of the driving force control device that controls the driving force by the driving source. The abnormality detection unit detects an abnormality of the driving force control device at a predetermined abnormality detection period, and when the abnormality detection unit detects an abnormality of the driving force control device, a primary abnormality process of the driving force control device When the abnormality is not detected, the primary abnormality process is canceled, the electronic control of the driving force control device is performed normally, and the abnormality detection signal detected by the abnormality detection unit is a predetermined value. If the abnormality determination period continues, the primary abnormality process is shifted to the secondary abnormality process.

  In a preferred embodiment, the predetermined abnormality detection period is 1/20 or less of a predetermined abnormality determination period.

  In a preferred embodiment, the driving source is an engine, a motor, or a transmission.

  In a preferred embodiment, the primary abnormality process includes the same process as the secondary abnormality process.

  A control method for a driving force control device for a straddle-type vehicle according to the present invention is a control method for a driving force control device that controls a driving force by a driving source mounted on a vehicle, and the abnormality of the driving force control device is predetermined. When the abnormality of the driving force control device is detected, primary abnormality processing of the driving force control device is executed, and when no abnormality is detected, the primary abnormality processing is canceled and the driving force control device The control device executes normal control, and when the detected abnormality detection signal continues even after a predetermined abnormality determination period has elapsed, the primary abnormality processing is shifted to the secondary abnormality processing. And

  In a preferred embodiment, the driving source is an engine, a motor, or a transmission.

  The straddle type vehicle of the present invention is characterized in that the driving force control device for the straddle type vehicle is mounted.

  The driving force control device for a saddle-ride type vehicle according to the present invention detects an abnormality of the driving force control device at a predetermined abnormality detection cycle, and when an abnormality is detected, a primary abnormality process is executed and the abnormality is detected. If not detected, the primary abnormality processing is canceled and normal control is executed, so that abnormality detection due to noise or the like can be eliminated. Moreover, when the abnormality detection signal continues even after a predetermined abnormality determination period has elapsed, the primary abnormality processing is shifted to the secondary abnormality processing, so that control of the engine control device based on the abnormality output is also avoided. Can do. Thereby, the behavior change of a vehicle is suppressed and the reliability of an engine control apparatus can be improved.

1 is a block diagram showing a basic configuration of an engine control device for a motorcycle in an embodiment of the present invention. It is the figure which showed an example of the abnormality detection signal in the embodiment of this invention, a primary abnormality signal, a normal (normal time) control signal, and a secondary abnormality signal. It is the figure which showed an example of the abnormality detection signal in the embodiment of this invention, a primary abnormality signal, a normal (normal time) control signal, and a secondary abnormality signal. 2 shows a flowchart of an embodiment of the present invention. It is the figure which showed the structure of the electronic throttle mechanism in embodiment of this invention. 1 is a diagram showing a configuration of a motorcycle equipped with an engine control device for a motorcycle according to the present invention.

  Embodiments of the present invention will be described below with reference to the drawings. In the following drawings, components having substantially the same function are denoted by the same reference numerals for the sake of simplicity. In addition, this invention is not limited to the following embodiment.

  The drive source mounted on the vehicle includes an engine, a motor, a transmission, and the like. In this embodiment, the engine will be described below as a representative example.

  FIG. 1 is a block diagram showing a basic configuration of an engine control device 10 for a motorcycle according to an embodiment of the present invention.

  As shown in FIG. 1, the engine control device 10 detects an abnormality in a control CPU (Central Processing Unit) 11 that performs engine injection / ignition control and throttle valve control, and an engine control device 10. An abnormality detection unit 12 is provided.

  Sensor signals such as a throttle position sensor 21, an accelerator position sensor 22, an engine speed sensor 23, a speed sensor 24, and a water temperature sensor 25 are input to the control CPU 11, and the fuel injection amount, ignition timing, and throttle required for engine control are input. It calculates the valve opening and outputs these control signals. The control signal is input to a drive circuit 16 that controls a drive motor 31 of a throttle valve (not shown), a fuel injection valve 32, and a drive circuit 17 that drives a spark plug 33, and executes predetermined electronic control.

  The abnormality detection unit 12 repeatedly detects an abnormality of the engine control device 10 at a predetermined abnormality detection period (for example, a period of 1 ms). When an abnormality is detected in the engine control device 10, a fail signal is output to the primary abnormality processing unit 14, and upon receiving the signal, the primary abnormality processing unit 14 shuts down the drive of the throttle valve (primary abnormality processing). Run. When no abnormality is detected in the engine control device 10, electronic control when the engine control device 10 is normal is executed.

  In addition, when an abnormality is detected in the previous cycle and the primary abnormality processing is being executed, if no abnormality is detected in the next cycle, the primary abnormality processing is canceled and electronic control at normal time is executed. However, since the switching is performed at an early cycle of about 1 ms, the rider does not feel a change in the behavior of the vehicle.

  Here, the throttle valve drive shut-off is exemplified as the primary abnormality process, but other processes such as a process of reducing the fuel injection amount, retarding the ignition timing, and the like may be executed.

  If the abnormality detection signal detected by the abnormality detection unit 12 continues even after a predetermined abnormality determination period (for example, 20 ms), it is determined that an abnormality has occurred in the engine control device 10. The primary abnormality process that has been executed until then is transferred to the secondary abnormality process.

  This secondary abnormality process corresponds to the process at the time of the original abnormality occurrence, and is executed by shutting off the throttle valve. If the throttle valve drive is cut off as the primary abnormality process, the process is continued.

  Further, whether or not the abnormality detection signal continues even after a predetermined abnormality determination period has elapsed can be determined by counting the abnormality detection signal from the abnormality detection unit 12 with the counter 13.

  Here, the abnormality detection performed by the abnormality detection unit 12 is an abnormality other than the engine control device 10 in addition to each component such as a CPU constituting the engine control device 10 and each sensor signal (including wire disconnection / short circuit). For example, abnormalities such as the drive motor 31 of the throttle valve, the fuel injection valve 32, and the spark plug 33 can be included in the object.

  In the present embodiment, the abnormality detection period for detecting an abnormality of the engine control apparatus 10 and the abnormality determination period for determining whether or not an original abnormality has occurred are not particularly limited, but the abnormality detection period is a primary abnormality process. It is preferable to set a short cycle that does not cause a change in the vehicle behavior even when switching occurs, and an abnormality determination period that is long enough to eliminate detection due to noise or the like. For example, the abnormality detection cycle is preferably 1/20 or less of the abnormality determination period.

  The configuration of the engine control apparatus 10 in the present invention is not necessarily limited to the hard wafer configuration as shown in FIG. For example, the primary abnormality processing unit 14 and the secondary abnormality processing unit 15 are configured separately from the control CPU 11, but may be executed by a predetermined program in the control CPU 11. Moreover, although the abnormality detection part 12 is also made into the independent structure, you may control abnormality detection within the control CPU11.

  According to the present embodiment described above, an abnormality of the engine control device is detected at a predetermined abnormality detection cycle, and when an abnormality is detected, a primary abnormality process is executed, and when no abnormality is detected, Since the primary abnormality processing is canceled and normal electronic control is executed, abnormality detection due to noise or the like can be eliminated. Moreover, when the abnormality detection signal continues even after a predetermined abnormality determination period has elapsed, the primary abnormality processing is shifted to the secondary abnormality processing, so that control of the engine control device based on the abnormality output is also avoided. Can do. Thereby, the behavior change of a vehicle is suppressed and the reliability of an engine control apparatus can be improved.

  In the present embodiment, the driving force control device and the control method thereof according to the present invention have been described using the example of the engine control device 10. However, driving in a driving source (for example, a motor, a transmission, etc.) other than the engine is described. It goes without saying that the effects of the present invention are also exerted on the force control device.

  2 and 3 are diagrams illustrating examples of the abnormality detection signal, the primary abnormality signal, the normal (normal) control signal, and the secondary abnormality signal in the present embodiment.

  An abnormality in the engine control device 10 is repeatedly detected by the abnormality detection unit 12 at a predetermined abnormality detection cycle (for example, a cycle of 1 ms), and when an abnormality is detected, a primary abnormality detection signal (fail signal) is output. In response to this signal, the primary abnormality processing unit 14 outputs a primary abnormality signal, and based on this signal, primary abnormality processing (for example, driving of the throttle valve is cut off) is performed. When no abnormality is detected in the engine control device 10, a normal (normal) control signal is output, and this signal is received by the control CPU 11 to execute normal electronic control of the engine control device 10. . That is, either the primary abnormality signal or the normal control signal is output in response to the abnormality detection signal “0” or “1”, and the engine control apparatus 10 determines whether the primary abnormality processing is normal (normal). One of the electronic controls is executed.

  In the example shown in FIG. 2, since the abnormality detection signal does not continue even after a predetermined abnormality determination period (for example, 20 ms), it is determined that no abnormality has occurred in the engine control device 10. No secondary abnormality signal is output, and secondary abnormality processing is not executed.

  On the other hand, in the example shown in FIG. 3, the abnormality detection signal continues even after a predetermined abnormality determination period has elapsed, so the engine control device 10 determines that an abnormality has occurred, and the abnormality determination period After the elapse of time, a secondary abnormality signal is output, and as a result, the engine control apparatus 10 executes a secondary abnormality process.

  FIG. 4 shows a flowchart of the present embodiment. For the engine control apparatus 10 that is performing normal control (step S101), it is determined whether an abnormality is detected in the engine control apparatus 10 (step S102). When an abnormality is detected in the engine control device 10, a primary abnormality process is executed (step S103). At this time, the primary abnormality signal (FA1) is set to “1” which means abnormality.

  On the other hand, if no abnormality is detected in the engine control apparatus 10, the primary abnormality signal (FA1) is set to “0” meaning normal (step S105), and normal (normal) control is continued (step S105). S101). If FA1 = 1 (abnormality detection) is set in the previous cycle and primary abnormality processing is being executed, a reset signal for canceling the primary abnormality processing is also output.

  If an abnormality is detected in the engine control device 10, in step S104, the abnormality detection signal (FA1) is counted by the counter 13, and it is determined whether FA1 has reached a predetermined count (for example, 20 or more). (Step S106) If the predetermined number of counts has been reached, secondary abnormality processing is executed (S107). If the predetermined count has not been reached, the process returns to S102 to determine whether or not an abnormality has been detected.

  Since the routine of steps S101 to S106 is repeatedly executed in an abnormality detection cycle (for example, 1 ms), the fact that FA1 performed in step S106 has reached a predetermined number of counts indicates that the abnormality detection signal is a predetermined abnormality. It means that it continues even after a determination period (for example, 20 ms) has elapsed. Therefore, in this case, the engine control apparatus 10 determines that an abnormality has occurred, and the engine control apparatus 10 executes the secondary abnormality process.

  By executing the processing in the steps as described above, abnormality detection due to noise or the like can be eliminated, and even if it is finally determined to be abnormal while avoiding control of the engine control device based on the abnormal output. The change in behavior of the vehicle is suppressed, and the reliability of the engine control device can be improved.

  FIG. 5 is a diagram showing a configuration of an electronic throttle mechanism mounted on the motorcycle. The throttle body 40 has a cylindrical shape, and the throttle valve 41 is fixed to a single common valve shaft 42 arranged so as to penetrate all the throttle bodies 40. The drive motor 43 is arranged so that the rotation shaft thereof is parallel to the valve shaft 42, and is configured to rotationally drive the valve shaft 42 via a plurality of gears 44.

  FIG. 6 is a diagram showing the configuration of a motorcycle 200 equipped with the motorcycle engine control apparatus 10 of the present embodiment. A fuel tank 202 is provided in the upper part of the tank rail 201, and an engine unit 203 is provided in the lower part. The engine unit 203 functions as a power source for the water-cooled four-cycle parallel four-cylinder, and an engine control device (not shown) is provided under the seat 205.

  As mentioned above, although this invention was demonstrated by suitable embodiment, such description is not a limitation matter and of course various modifications are possible. The motorcycle in the above embodiment means a motorcycle, and includes a motor-equipped bicycle (motorbike) and a scooter, and specifically refers to a vehicle that can turn by tilting the vehicle body. Therefore, even if at least one of the front wheels and the rear wheels is two or more and the number of tires is counted as a tricycle / four-wheel vehicle (or more), it can be included in the “motorcycle”. Further, the present invention can be applied not only to motorcycles but also to other vehicles that can use the effects of the present invention. For example, in addition to motorcycles, four-wheel buggy (ATV: All Terrain Vehicle) and snowmobiles can be used. It can be applied to so-called saddle riding type vehicles.

  The drive source mounted on the vehicle includes an engine, a motor, a transmission, and the like, but also includes a device that is controlled in a path that transmits a driving force, such as a clutch.

  ADVANTAGE OF THE INVENTION According to this invention, the driving force control apparatus for saddle riding type vehicles (motorcycle) provided with the function which can suppress the behavior change of the vehicle by noise etc. can be provided.

10 Engine (drive force) control device 11 Control CPU
DESCRIPTION OF SYMBOLS 12 Abnormality detection part 13 Counter 14 Primary abnormality process part 15 Secondary abnormality process part 16, 17 Drive circuit 21 Throttle position sensor 22 Accelerator position sensor 23 Engine speed sensor 24 Speed sensor 25 Water temperature sensor 31 Drive motor 32 Fuel injection valve 33 Ignition Plug 40 Throttle body 41 Throttle valve 42 Valve shaft 43 Drive motor 200 Motorcycle 201 Tank rail 202 Fuel tank 203 Engine unit

Claims (7)

A driving source;
A driving force control device for straddle-type vehicles, comprising: an abnormality detection unit that detects an abnormality of the driving force control device that controls the driving force by the driving source;
The abnormality detection unit detects an abnormality of the driving force control device at a predetermined abnormality detection cycle,
When an abnormality of the driving force control device is detected by the abnormality detection unit, a primary abnormality process of the driving force control device is executed, and when no abnormality is detected, the primary abnormality process is canceled, The electronic control at the normal time of the driving force control device is executed,
When the abnormality detection signal detected by the abnormality detection unit is repeatedly detected and continues even after a predetermined abnormality determination period, the primary abnormality process is shifted to a secondary abnormality process,
In the case where the abnormality is detected in the previous abnormality detection cycle and the primary abnormality process is executed, when the abnormality is not detected in the abnormality detection cycle next to the previous abnormality detection cycle, the predetermined abnormality is performed. Even within the abnormality determination period, the primary abnormality process is canceled and the electronic control at the normal time is executed.
The primary abnormality process is the same process as the secondary abnormality process,
The primary abnormality process and the secondary abnormality process are drive cutoff of a throttle valve ,
Drive for straddle-type vehicle, characterized in that when the accelerator position measured by the accelerator position sensor is on, the throttle valve drive shut-off is executed as the primary abnormality process and the secondary abnormality process. Force control device.   The driving force control device for a straddle-type vehicle according to claim 1, wherein the predetermined abnormality detection period is 1/20 or less of the predetermined abnormality determination period.   The driving force control apparatus for straddle-type vehicles according to claim 2, wherein the predetermined abnormality detection period is 1 ms.   The driving force control device for a saddle-ride type vehicle according to any one of claims 1 to 3, wherein the driving source is an engine, a motor, or a transmission. A control method of a driving force control device for a saddle riding type vehicle for controlling a driving force by a driving source mounted on the vehicle,
Detecting an abnormality of the driving force control device at a predetermined abnormality detection cycle;
When abnormality of the driving force control device is detected, primary abnormality processing of the driving force control device is executed, and when abnormality is not detected, the primary abnormality processing is canceled and when the driving force control device is normal And execute the control of
When the detected abnormality detection signal is repeatedly detected and continues even after a predetermined abnormality determination period has elapsed, the primary abnormality processing is shifted to secondary abnormality processing,
In the case where the abnormality is detected in the previous abnormality detection cycle and the primary abnormality process is executed, when the abnormality is not detected in the abnormality detection cycle next to the previous abnormality detection cycle, the predetermined abnormality is performed. Even within the abnormality determination period, the primary abnormality process is canceled and the electronic control at the normal time is executed.
The primary abnormality process is the same process as the secondary abnormality process,
The primary abnormality process and the secondary abnormality process are drive cutoff of a throttle valve ,
Drive for straddle-type vehicle, characterized in that when the accelerator position measured by the accelerator position sensor is on, the throttle valve drive shut-off is executed as the primary abnormality process and the secondary abnormality process. Control method of force control device.   The method of controlling a driving force control apparatus for a saddle riding type vehicle according to claim 5, wherein the driving source is an engine, a motor, or a transmission.   A straddle-type vehicle on which the driving force control device for a straddle-type vehicle according to any one of claims 1 to 4 is mounted.

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