JP2010016948A - Power generation control device and power generation control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that it is difficult to highly maintain the controllability of torque of an internal combustion engine which is usable as a drive force even if the on-operation of an AC generator 40 which is mechanically connected to a crankshaft of the internal combustion engine 10 is performed according to the rotational angle of the crankshaft. <P>SOLUTION: An ECU 70 controls the power generation rate of the AC generator 40 by operating a regulator 50. In particular, the ECU 70 variably sets a target power generation rate according to the operation state of the internal combustion engine 10, and controls an actual power generation rate to the target power generation rate. However, when the target power generation rate and the present power generation rate differ from each other, the actual power generation rate is gradually changed to the target power generation rate. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power generation control device including an operation means for performing at least one of an on operation and an off operation of a generator mechanically connected to an output shaft of an internal combustion engine according to a rotation angle of the output shaft, and a power generation control system About.

As this type of control device, for example, as seen in Patent Document 1 below, when starting an internal combustion engine mounted on a motorcycle, the generator is turned on / off according to the rotation angle of the crankshaft of the internal combustion engine. Some have been proposed to operate. Here, the generator is turned on over a predetermined angle region based on a predetermined rotation angle at which the torque of the internal combustion engine increases, and this region is gradually enlarged. In this way, by setting the timing at which the load torque is applied to the internal combustion engine due to the power generation by the generator as the timing at which the torque of the internal combustion engine increases, the rotation by the power generation can be performed even at the start-up when the rotation of the internal combustion engine is not stable. The fluctuation can be suitably suppressed.
JP 2006-129680 A

  By the way, since the load torque is applied to the internal combustion engine by the power generation by the generator, the torque of the internal combustion engine that can be used as the driving force of the vehicle is reduced. For this reason, as described in the above technology, when power is generated in the entire crank angle region after the internal combustion engine is started, the torque that can be used as the driving force of the vehicle is set to an appropriate value. There is a concern that it will be difficult and will eventually lead to a decrease in drivability.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to rotate at least one of an on operation and an off operation of a generator mechanically connected to an output shaft of an internal combustion engine. An object of the present invention is to provide a power generation control device and a power generation control system that can be maintained according to an angle and can maintain high controllability of torque of an internal combustion engine that can be used as a driving force.

  Hereinafter, means for solving the above-described problems and the operation and effects thereof will be described.

  The invention according to claim 1 is a power generation control device including an operation unit that performs on / off operation of a generator mechanically connected to an output shaft of an internal combustion engine according to a rotation angle of the output shaft. A setting means for variably setting a power generation rate, which is a ratio of an angular interval at which the generator is turned on with respect to a predetermined angular interval of the output shaft, with a parameter indicating an operating state of the internal combustion engine as an input; and the setting unit When the generated power generation rate is different from the current power generation rate, a change speed reduction unit is provided for gradually changing the actual power generation rate to the power generation rate set by the setting unit.

  In the above invention, by providing the setting means, the load torque applied to the output shaft of the internal combustion engine can be controlled as desired. For this reason, even when the generator is driven by an internal combustion engine, it is possible to suppress a decrease in controllability of torque that can be used as a driving force. In particular, in the above invention, the change in load torque applied to the output shaft of the internal combustion engine can be suitably suppressed by providing the change speed reduction means. For this reason, when an internal combustion engine is mounted on a vehicle, it is possible to suitably suppress a decrease in drivability due to a sudden change in torque that can be used as a driving force.

  The predetermined angular interval is preferably an integral multiple of one combustion cycle of the internal combustion engine.

  According to a second aspect of the present invention, in the first aspect of the present invention, when the power generation rate set by the setting unit is different from the current power generation rate, the change speed reducing unit sets the current power generation rate to a predetermined value. Only the process of approaching the set power generation rate is performed at each predetermined angular interval.

  In the above invention, in order to change the power generation rate at every predetermined angular interval, even if there is a priority order in the angular interval at which the generator is turned on within the predetermined angular interval, the power generation rate can be changed accordingly. it can.

  Such an effect can be achieved particularly preferably by setting the predetermined angular interval to an integral multiple of one combustion cycle of the internal combustion engine.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the generator is turned on or off at every predetermined rotation angle smaller than the predetermined angular interval according to the power generation rate of the generator. It is further characterized by further comprising on / off defining means for defining whether or not to do.

  In the above-mentioned invention, even if there is a priority order in the angular interval at which the generator is turned on within the predetermined angular interval, the power generation rate can be suitably changed according to this.

  According to a fourth aspect of the present invention, in the third aspect of the invention, the on / off defining means prioritizes an angular interval corresponding to a combustion stroke of the internal combustion engine as an angular interval at which the generator is turned on. It is characterized by using.

  The torque generated by the internal combustion engine tends to be maximized in the combustion stroke of the internal combustion engine. For this reason, if the generator is turned on preferentially in the combustion stroke, it is possible to suitably suppress the fluctuation of the torque that can be used as the driving force due to the influence of the on / off of the generator. Furthermore, in this case, it is possible to suppress rotational fluctuations caused by the combustion cycle of the internal combustion engine.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, when the amount of increase of the required torque for the internal combustion engine per predetermined time is greater than or equal to a predetermined value, Regardless of the setting of the setting means, the generator is forcibly turned off.

  When the required torque of the internal combustion engine increases rapidly, if the generator is in the on state, a part of the torque generated by the internal combustion engine is offset by the load torque, so that it is required as a driving force. There is a risk that it will not be possible to cope with the increase in torque. In this respect, in the above-described invention, the above-described problem can be suitably avoided by forcibly turning off the generator under such circumstances.

  According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the operation means is operated by turning on an opening / closing means for opening / closing between an output terminal of the generator and an electric load. The generator is turned on.

  In the above invention, the load torque can be easily applied to the output shaft of the internal combustion engine by the generator by electrically connecting the output terminal of the generator and the electric load by the opening / closing means.

  The opening / closing means may be a means for preventing a current from flowing in the reverse direction with the direction from the generator side to the electric load side as the forward direction.

  According to a seventh aspect of the present invention, in the first aspect of the present invention, the internal combustion engine is mounted on a motorcycle.

  In a motorcycle, the load torque applied by the generator to the internal combustion engine tends to have a great influence on the controllability of torque that can be used as a power source for the vehicle. For this reason, the applicability value of the inventions of claims 1 to 6 is particularly high.

  The invention according to claim 8 is a power generation control system comprising the power generation control device according to any one of claims 1 to 7 and the generator.

  In the said invention, the system which can maintain the controllability of the torque which can be utilized as a driving force highly is implement | achieved by mounting the electric power generation control apparatus of any one of Claims 1-7.

  Hereinafter, an embodiment in which a power generation control device according to the present invention is applied to a power generation control device for a motorcycle will be described with reference to the drawings.

  FIG. 1 shows the system configuration of this embodiment.

  The illustrated internal combustion engine 10 is of a single cylinder. Specifically, the internal combustion engine 10 is an intake port type spark ignition internal combustion engine. A throttle valve 16 that is mechanically operated by an accelerator grip 14 is provided upstream of the intake passage 12 of the internal combustion engine 10. A throttle sensor 17 that detects the opening of the throttle valve 16 (throttle opening θ) is provided near the throttle valve 16. A fuel injection valve 18 is provided downstream of the intake passage 12. When the fuel injection valve 18 is opened, fuel (for example, gasoline) is injected into the intake passage 12.

  The intake passage 12 is communicated with the combustion chamber 22 by the opening operation of the intake valve 20. A spark plug 26 projects from the combustion chamber 22. The mixture of the intake air and the fuel in the combustion chamber 22 is used for combustion by the discharge spark between both electrodes of the spark plug 26. This combustion energy is converted into mechanical energy that displaces the piston 24, and as a result, the output shaft (crank shaft) of the internal combustion engine 10 is rotated. The air-fuel mixture used for combustion is discharged into the exhaust passage 30 as exhaust gas as the exhaust valve 28 is opened.

  The rotor 40b of the AC generator 40 is directly connected to the crankshaft. The AC generator 40 is an 8-pole generator. And the protrusion part 42 is provided in the outer periphery of the rotor 40b for every predetermined angle (here 30 degree CA is illustrated). That is, the outer periphery of the rotor 40b constitutes a timing rotor for detecting the rotation angle of the crankshaft. Although not shown, it is desirable that the flywheel be integrally formed in addition to the crankshaft and the AC generator 40.

  The stator 40a of the AC generator 40 is connected to an output terminal. One of the output terminals is grounded, and the other is connected to the regulator 50. The regulator 50 selectively extracts a negative current out of the alternating current output from the alternating current generator 40 and outputs it to the vehicle lamp 44, and the on-vehicle electric power other than the lamp 44 by selectively extracting the positive current. And a function of supplying the load.

  Specifically, one end of the lamp 44 is grounded, and the other end is connected to the anode of the diode 52 via a switching element 46 that can be operated by a user. The cathode side of the diode 52 is connected to the output terminal of the AC generator 40. As a result, the negative current of the AC generator 40 can be supplied to the lamp 44.

  On the other hand, the output terminal of the AC generator 40 is also connected to the anode of the thyristor 54. The cathode side of the thyristor 54 is connected to an on-vehicle electric load such as the fuel injection valve 18 and the spark plug 26 as well as the battery 60. A voltage control circuit 56 is connected to the gate of the thyristor 54. The voltage control circuit 56 has a function of turning off the thyristor 54 when the voltage on the cathode side of the thyristor 54 exceeds a predetermined value. The voltage control circuit 56 also has a function of turning on / off the thyristor 54 based on a command from the outside.

  The output voltage of the thyristor 54 is further applied to the capacitor 58 via the diode 57.

  The system according to the present embodiment further includes an electronic control unit (ECU 70) that uses the capacitor 58 as a direct power source. The ECU 70 controls the internal combustion engine 10 and operates actuators such as the fuel injection valve 18 and the spark plug 26 on the basis of output signals from the crank angle sensor 72 and the throttle sensor 17 that detect the rotation angle of the crankshaft. The ECU 70 also has a function of turning on and off the AC generator 40 via the regulator 50. Specifically, the AC generator 40 is turned on / off by turning on / off the thyristor 54 via the voltage control circuit 56 in the regulator 50.

  Hereinafter, the power generation control of the AC generator 40 in the processing performed by the ECU 70 will be described in detail.

  FIG. 2A and FIG. 2B show the generated current of the AC generator 40. Here, FIG. 2A shows the transition of the generated current of the AC generator 40, and FIG. 2B shows the transition of the crank signal based on the output of the crank angle sensor 72. As shown in the figure, the cycle of the alternating current output from the alternating current generator 40 is “90 ° CA”. This corresponds to the fact that the AC generator 40 has 8 poles. That is, in this embodiment, since the rotor 40b of the AC generator 40 and the crankshaft of the internal combustion engine 10 are directly connected, one rotation of the rotor 40b of the AC generator 40 is “360 ° CA”. In the 8-pole rotating machine, one cycle of the electrical angle is “1/4” of one rotation of the rotor 40b.

  In the present embodiment, the crank signal based on the output of the crank angle sensor 72 and the alternator 40 are further adjusted by adjusting the geometric relationship between the protrusion 42 of the rotor 40b and the pole of the alternator 40. The output current polarity inversion timing is synchronized.

  In such a configuration, as shown in FIGS. 2C and 2D, the amount of power generation is adjusted by turning on and off the AC generator 40 for each crank signal. FIG. 2C shows the transition of the alternating current output from the AC generator 40, and FIG. 2D shows the driving state of the AC generator 40. Here, the period indicated by the oblique lines in FIG. 2D is a period in which the output current of the AC generator 40 is negative. Therefore, the power generation of the AC generator 40 is stopped depending on the electronic operation of the regulator 50. It is a period that cannot be done. In the example shown in the figure, an example is shown in which power generation by the AC generator 40 is performed in six periods out of eight periods in which the output current of the AC generator 40 is positive in one combustion cycle (four strokes). .

  In the present embodiment, the ratio of the angular interval at which the alternator 40 is turned on among the eight periods in which the output current of the alternator 40 is positive in one combustion cycle is defined as the power generation rate. Incidentally, in the example of the figure, the power generation rate is “75%”. In the present embodiment, the power generation rate is variably set according to the operating state of the internal combustion engine 10.

  FIG. 3A shows a map used for the variable setting. Here, the number of poles that turn on the AC generator 40 in one combustion cycle is defined as the number of electrodes. That is, the number of generating electrodes is the number of periods in which the alternator 40 is turned on among eight periods in which the output current of the alternator 40 is positive in one combustion cycle. In the present embodiment, a different number of electrodes is set for each increase, decrease, and steady state of the required torque for the internal combustion engine 10. Specifically, at this time, the number of emitting electrodes is set so as to decrease in the order of decreasing, increasing, and stationary. Specifically, as shown in FIG. 3 (a), the number of electrodes is set with a region where the change amount Δθ of the throttle opening θ is larger than the specified increase amount ΔθH when the required torque is increased (hereinafter referred to as acceleration). Is β. Further, even when the change amount Δθ is equal to or less than the specified increase amount ΔθH, when the change amount ΔNE of the rotational speed NE exceeds the specified increase amount ΔNH, it is determined that the acceleration is performed and the number of emitting electrodes is β. On the other hand, a region where the change amount Δθ of the throttle opening θ is less than the specified decrease amount ΔθL (excluding the acceleration region) is defined as when the required torque is decreased (hereinafter referred to as deceleration), and the number of electrodes is α. . Further, even if the change amount Δθ is not less than the specified decrease amount ΔθL and not more than the specified increase amount ΔθH, if the change amount ΔNE of the rotational speed NE is not more than the specified decrease amount ΔNL, it is determined that the vehicle is decelerating and the number of electrodes is α. To do. And let the remaining area | region be a steady area | region and let the number of emitting electrodes be (gamma).

  The power generation rate (number of electrodes) is realized under the condition that power generation is performed preferentially in the combustion stroke, as schematically shown in FIG. Specifically, the above-described number of emitting electrodes is realized under the condition that the priority is lowered in the order of the combustion stroke, the intake stroke, the exhaust stroke, and the compression stroke. This can be realized by creating a map illustrated in FIG. 4 in advance and storing it in the ECU 70. In FIG. 4, the crank signal corresponding to the initial stage of the combustion stroke is defined as the crank number “0”, and the AC generator 40 is turned on and off (specifically, the thyristor 54) for each crank signal according to the number of electrodes. On state and off state). Here, in the present embodiment, in particular, in one period (180 ° CA) of the output current of the AC generator 40, either the on state or the off state is set. This is a setting for facilitating calculation of the number of emitting electrodes described later. Incidentally, since there is a missing tooth portion on the outer periphery of the rotor 40b, there is one region at “360 ° CA” where the protruding portion 42 does not exist. However, since the technique for predicting and generating the crank signal corresponding to the missing tooth part based on the crank signal before that is well known, this is also used in the present embodiment.

  By the way, when changing the number of generating electrodes based on the map shown to Fig.2 (a), the load torque which the alternating current generator 40 applies to a crankshaft may change rapidly. In this case, since the torque of the internal combustion engine 10 that can be used as a driving force changes suddenly when the number of generating electrodes is switched, an impact is generated on the vehicle, which may lead to a decrease in drivability.

  Therefore, in the present embodiment, when the number of emitting electrodes set based on FIG. 2A is different from the current number of emitting electrodes, the actual number of emitting electrodes is gradually changed to the set number of emitting electrodes. To perform the process. FIG. 5 shows a processing procedure for changing the number of emitting electrodes according to the present embodiment. This process is repeatedly executed by the ECU 70 at, for example, a predetermined cycle (here, one combustion cycle is illustrated).

  In this series of processing, first, in step S10, the throttle opening θ and the rotational speed NE are acquired. In the subsequent step S12, the target number of electrodes is set using the map shown in FIG. Here, the opening change amount Δθ and the speed change amount ΔNE calculated as the difference between the previous value and the current value of the throttle opening θ and the rotational speed acquired in step S10 are used. In a succeeding step S14, it is determined whether or not the target number of electrodes is larger than the current number of electrodes. This process is for determining whether or not to perform a process of gradually increasing the power generation rate. If it is determined that the target number of electrodes is larger, in step S16, a value obtained by increasing the current number of electrodes by a predetermined value Δ1 is set as the next number of electrodes.

  On the other hand, when a negative determination is made in step S14, it is determined in step S18 whether or not the current number of emitting electrodes is larger than the target number of emitting electrodes. This process is for determining whether or not to perform a process of gradually reducing the power generation rate. If it is determined that the current number of electrodes is larger, in step S20, a value obtained by reducing the current number of electrodes by a predetermined value Δ2 (> 0) is set as the next number of electrodes.

  In addition, when the process of said step S16, S20 is completed, or when negative determination is made in step S18, this series of processes is once complete | finished.

  FIG. 6 shows a power generation control processing procedure based on the power generation rate set in the above processing. This process is repeatedly executed by the ECU 70 at, for example, a predetermined crank angle cycle (here, every crank signal is illustrated).

  In this series of processing, first, in step S30, it is determined whether or not the change amount Δθ of the throttle opening θ is larger than the threshold value ΔθHH. This process is for determining whether or not the required torque of the internal combustion engine 10 is rapidly increasing. Here, the threshold value ΔθHH is set to a value larger than the specified increase amount ΔθH. This is a setting for determining whether or not there is a particularly steep increase in the required torque in the acceleration region defined by the map of FIG. 3A. If it is determined that it is larger than the threshold value ΔθHH, in step S32, the acceleration switching flag indicating that the required torque is suddenly increased is set to “1”, and the AC generator 40 is forcibly set regardless of the target power generation rate. Turn off.

  On the other hand, if a negative determination is made in step S30, it is determined in step S34 whether or not the acceleration switching flag is “1”. This process is for determining whether or not it is immediately after it is determined that the required torque is rapidly increased. If it is determined in step S34 that the acceleration switching flag is “1”, the alternator 40 is forcibly turned off in step S36 regardless of the target power generation rate.

  On the other hand, if a negative determination is made in step S34, it is determined in step S38 whether the AC generator 40 is to be turned on or off based on the map shown in FIG. Specifically, it is determined whether to turn the thyristor 54 on or off. Here, at the time of switching from the on state to the off state, a process of supplying current to the gate is performed in order to turn on the thyristor 54.

  When the process of step S38 and the processes of steps S32 and S36 are completed, it is determined in step S40 whether or not the crank number is “0”. This process is for determining the start point of one combustion cycle. If a negative determination is made in step S40, it is determined in step S44 whether or not the AC generator 40 is in an on state. If it is determined to be in the on state, in step S46, a counter that counts the period during which the AC generator 40 is in the on state is incremented.

  On the other hand, when it is determined in step S40 that the crank number is “0”, in step S42, the number of emitting electrodes used in the processing shown in FIG. 5 is calculated based on the counter value. Further, the counter is initialized and the acceleration switching flag is set to “0”.

  In addition, when the process of said step S46, S42 is completed, or when negative determination is made in step S44, this series of processes is once complete | finished.

  According to the embodiment described in detail above, the following effects can be obtained.

  (1) When the target power generation rate is different from the current power generation rate, the actual power generation rate was gradually changed to the target power generation rate. Thereby, the fall of the drivability by the sudden change of a torque can be suppressed suitably.

  (2) When the target power generation rate is different from the current power generation rate, a process for bringing the current power generation rate close to the target power generation rate by a predetermined value was performed for each combustion cycle. Thereby, a power generation rate can be changed according to the priority of the angle interval which turns on the AC generator 40.

  (3) A map (FIG. 4) is provided that defines whether the AC generator 40 is turned on or off within one combustion cycle. As a result, the power generation rate can be suitably controlled according to the priority order of the angular intervals at which the AC generator 40 is turned on.

  (4) The angular interval corresponding to the combustion stroke of the internal combustion engine 10 was preferentially used as the angular interval at which the AC generator 40 was turned on. Thereby, it can suppress suitably that the torque which can be utilized as a driving force due to the influence of ON / OFF of the AC generator 40 falls. Further, it is possible to suppress rotational fluctuations caused by the combustion cycle of the internal combustion engine 10.

  (5) When the increase amount of the required torque for the internal combustion engine 10 per predetermined time is greater than or equal to a predetermined value (Δθ> ΔθHH), the AC generator 40 is forcibly turned off regardless of the target power generation rate. Thereby, it is possible to suitably cope with an increase in torque required as a driving force.

  (6) The present invention is applied to a motorcycle. In a motorcycle, the load torque applied by the AC generator 40 to the internal combustion engine 10 tends to have a great influence on the controllability of torque that can be used as the driving force of the vehicle. For this reason, the application value of the present invention is particularly high.

(Other embodiments)
The above embodiment may be modified as follows.

  The setting means for variably setting the power generation rate is not limited to means for directly setting the number of emitting electrodes, but may be means for setting the power generation rate as a direct setting target parameter.

  -In the said embodiment, although the electric power generation rate was computed for every 1 combustion cycle (4 strokes), it is not restricted to this. For example, it may be calculated every integer (≧ 2) times of one combustion cycle. Further, for example, while the power generation rate is defined in one combustion cycle, the update cycle may be set to an angular interval shorter than this (for example, 360 ° CA).

  In the above embodiment, the angular interval corresponding to the combustion stroke of the internal combustion engine 10 is preferentially used as the angular interval at which the alternator 40 is turned on, but is not limited thereto. For example, in a motorcycle or the like, the user may prefer the rotational fluctuation of the internal combustion engine 10. In the case of a design that satisfies such user requirements, it is possible to preferentially use the exhaust stroke or the compression stroke so as to suppress the reduction in rotational fluctuation of the internal combustion engine 10.

  The means for defining the operation state of the regulator 50 in accordance with the number of emitting electrodes is not limited to the one for defining the operation state of the regulator 50 every four strokes as illustrated in FIG. For example, it may be an integer (≧ 2) times one combustion cycle (4 strokes).

  In the above embodiment, the input parameters of the setting means for variably setting the power generation rate are the opening change amount Δθ and the speed change amount ΔNE, but are not limited thereto. For example, the amount of operation of the accelerator operation member (accelerator grip 14), the amount of change in intake pressure, or the like may be used.

  The setting means for variably setting the power generation rate with the parameter indicating the operating state of the internal combustion engine 10 as an input is not limited to that illustrated in FIG. For example, for each rotation angle corresponding to each stroke, it is determined whether or not the current number of emitting electrodes is equal to or greater than a corresponding threshold value. Good. Here, it is desirable that the threshold corresponding to the combustion stroke is minimized.

  When the amount of increase in the required torque for the internal combustion engine 10 per predetermined time is greater than or equal to a predetermined value, the means for turning off the AC generator 40 is a predetermined degree of increase in the degree of opening of the intake throttle valve (throttle valve 16). It is not restricted to what turns off the AC generator 40 based on becoming above. For example, the alternator 40 may be turned off based on the change amount ΔNE of the rotational speed being equal to or greater than a threshold value (> ΔNH).

  The regulator 50 is not limited to that illustrated in FIG. For example, a gate turn-off thyristor may be provided as an opening / closing means for opening / closing between the AC generator 40 and the electric load. In this case, in a period in which the output current of the AC generator 40 is positive, the AC generator 40 can be turned off by interrupting the output current. For example, a transistor may be used as the opening / closing means instead of the thyristor 54. Further, for example, a capacitor 58 that serves as a direct power source for the ECU 70 may not be provided. Further, for example, the negative current output from the AC generator 40 may not be used at all.

  The AC generator 40 is not limited to an eight-pole type, and the number of poles may be arbitrary. Further, the AC generator 40 is not limited to the one provided with a permanent magnet. Further, instead of directly connecting the AC generator 40 to the crankshaft, it may be mechanically connected using a gear having a predetermined gear ratio.

  In addition, the internal combustion engine is not limited to a single cylinder, but may be a multi-cylinder, and is not limited to a 4-stroke engine. Furthermore, it is not limited to being mounted on a motorcycle, but may be mounted on a four-wheeled vehicle, for example.

The system block diagram concerning one Embodiment. The time chart which shows the electric power generation aspect of the alternating current generator concerning the embodiment. The figure which shows the variable setting method of the power generation rate concerning the embodiment. The figure which prescribes | regulates on / off of the regulator concerning the embodiment. The flowchart which shows the procedure of the change process of the power generation rate concerning the embodiment. The flowchart which shows the operation method of the regulator concerning the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Internal combustion engine, 60 ... Alternator, 70 ... ECU (one embodiment of power generation control device).

Claims (8)

In a power generation control device comprising operation means for performing at least one of an on operation and an off operation of a generator mechanically connected to an output shaft of an internal combustion engine according to a rotation angle of the output shaft,
The operating means receives, as an input, a parameter indicating the operating state of the internal combustion engine, setting means for variably setting a power generation rate that is a ratio of an angular interval at which the generator is turned on to a predetermined angular interval of the output shaft When the power generation rate set by the setting means is different from the current power generation rate, a change speed reduction means is provided for gradually changing the actual power generation rate to the power generation rate set by the setting means. Power generation control device.   When the power generation rate set by the setting unit is different from the current power generation rate, the change speed reducing unit performs a process of bringing the current power generation rate closer to the set power generation rate by a predetermined value at each predetermined angle interval. The power generation control device according to claim 1, wherein   The operation means further includes an on / off defining means for defining whether the generator is turned on or off at every predetermined rotation angle smaller than the predetermined angle interval according to the power generation rate of the generator. The power generation control device according to claim 1 or 2, wherein   4. The power generation control device according to claim 3, wherein the on / off defining means preferentially uses an angular interval corresponding to a combustion stroke of the internal combustion engine as an angular interval at which the generator is turned on.   The operation means forcibly turns off the generator regardless of the setting of the setting means when the amount of increase in torque required for the internal combustion engine per predetermined time is greater than or equal to a predetermined value. Item 5. The power generation control device according to any one of Items 1 to 4.   The said operation means turns on the said generator by ON operation of the opening / closing means which opens and closes between the output terminal of the said generator, and an electrical load, The any one of Claims 1-5 characterized by the above-mentioned. Power generation control device.   The power generation control device according to claim 1, wherein the internal combustion engine is mounted on a motorcycle. The power generation control device according to any one of claims 1 to 7,
A power generation control system comprising the generator.

Images