JP4468969B2 - Control device for internal combustion engine - Google Patents

Description

  The present invention relates to an internal combustion engine control apparatus that reduces fluctuations in the rotational speed of an internal combustion engine using a rotating electrical machine.

  Conventionally, a rotating electrical machine is connected to a rotating shaft of an internal combustion engine, and the operation of the rotating electrical machine as a generator and the operation as an electric motor are controlled to reduce torque fluctuation due to combustion of the internal combustion engine, thereby reducing vibration of the internal combustion engine. There has been proposed a technique for reducing the above (for example, see Patent Document 1). The prior art disclosed in Patent Document 1 is an internal combustion engine in which torque generated by combustion of an internal combustion engine is suppressed by generated torque due to operation as an electric motor of a rotating electrical machine and absorption torque due to operation as a generator. This is a technique that reduces fluctuations in torque generated by combustion of the fuel.

  That is, when the fluctuation component of the torque generated by the combustion of the internal combustion engine is positive, the power generation output of the rotating electrical machine operating as the generator is increased to increase the absorption torque, or the rotating electrical machine operating as the electric motor By reducing the generated torque, the positive torque fluctuation component of the internal combustion engine is absorbed, and when the torque fluctuation component generated by the combustion of the internal combustion engine is negative, the power generation output of the rotating electrical machine operating as a generator is reduced. By absorbing the negative torque fluctuation component of the internal combustion engine by reducing the absorption torque to a small value or increasing the generated torque of the rotating electrical machine operating as an electric motor, the torque fluctuation due to the combustion of the internal combustion engine as a whole By suppressing this, the vibration of the internal combustion engine is suppressed.

JP-A-1-267327

  However, according to such a conventional control device for an internal combustion engine, in order to suppress the torque generated by the internal combustion engine, the time during which the rotating electrical machine operates as a motor for a long period of time is the time during which the rotating electrical machine operates as a generator. May exceed the power consumption due to the rotating electrical machine operating as an electric motor, more than the charging power due to operating as a generator, resulting in a decrease in the amount of electricity stored in the battery. Hereinafter, it is referred to as SOC). In addition, if the battery is not continuously charged with the SOC lowered, and the battery is left unattended, the deterioration of the battery is accelerated. Depending on the degree of deterioration of the battery, the internal combustion engine cannot be started, May need to be replaced.

  Further, according to the above-described conventional control device for an internal combustion engine, it does not have a function of monitoring the charging state and discharging state of the battery, and controls the power generation operation and driving operation of the rotating electrical machine according to the deterioration state of the battery. I can't.

  The present invention has been made to solve the above-mentioned problems in the control device for a conventional internal combustion engine, and reduces vibrations caused by torque fluctuations of the internal combustion engine and excessively deteriorates the battery. It is an object of the present invention to provide a control device for an internal combustion engine that does not have any.

  An internal combustion engine control apparatus according to the present invention includes a rotating electrical machine connected to an output shaft of an internal combustion engine for storing generated electric power in a power storage means, a drive region for applying torque to the output shaft of the front rotating electrical machine, and the internal combustion engine. A control device for an internal combustion engine having a rotating electrical machine control means that is driven to switch between a power generation region that is driven to generate power, the rotation angle detection means for detecting a rotation angle of an output shaft of the internal combustion engine, and the rotation A rotating electrical machine control means for controlling the operation of the electric machine in accordance with the operating state of the internal combustion engine; and a power storage monitoring means for monitoring the amount of power stored in the power storage means, wherein the rotating electrical machine control means is an idle operation of the internal combustion engine. When the rotational speed at the time exceeds a predetermined value, the first operating state in which the rotating electrical machine is operated in the power generation region, and the rotational speed during idle operation of the internal combustion engine is equal to or lower than the predetermined value and When the power storage amount detected by the power storage monitoring unit exceeds a predetermined value, the rotating electrical machine is moved to the drive region and the power generation region based on a predetermined timing corresponding to the rotation angle detected by the rotation angle detection unit. When the rotational speed during idling of the internal combustion engine is equal to or less than the predetermined value and the amount of charge detected by the power storage monitoring means is equal to or less than the predetermined value. The rotating electric machine is operated by switching between the drive region and the power generation region based on a timing different from the above, and the third operation state is made possible to change the switching timing. It is characterized by.

  The control apparatus for an internal combustion engine according to the present invention includes a rotating electrical machine connected to an output shaft of the internal combustion engine for storing generated electric power in a power storage means, a drive region for applying torque to the output shaft of the front rotating electrical machine, and the internal combustion engine A control device for an internal combustion engine having a rotating electrical machine control unit that is operated by switching between a power generation region that is driven by an engine and generates power, and a rotation angle detection unit that detects a rotation angle of an output shaft of the internal combustion engine; A rotating electrical machine control means for controlling the operation of the rotating electrical machine in accordance with the operating state of the internal combustion engine; and an electrical storage monitoring means for monitoring the amount of electricity stored in the electrical storage means. When the rotational speed during idle operation exceeds a predetermined value, the first operating state in which the rotating electrical machine is operated in the power generation region, and the rotational speed during idle operation of the internal combustion engine is less than the predetermined value and When the power storage amount detected by the power storage monitoring unit exceeds a predetermined value, the rotating electrical machine is moved to the drive region and the power generation region based on a predetermined timing corresponding to the rotation angle detected by the rotation angle detection unit. And when the rotational speed during idling of the internal combustion engine is not more than the predetermined value and the amount of electricity detected by the electricity storage monitoring means is not more than the predetermined value, the rotating electrical machine And a third operating state in which the target value of the generated voltage is different from the target value of the generated voltage of the rotating electrical machine in the second operating state, and the target value can be changed. It is characterized by having been comprised.

  According to the control device for an internal combustion engine of the present invention, a rotation angle detection means for detecting the rotation angle of the output shaft of the internal combustion engine, a rotating electrical machine control means for controlling the operation of the rotating electrical machine according to the operating state of the internal combustion engine, A power storage monitoring means for monitoring the amount of power stored in the power storage means, wherein the rotating electrical machine control means operates the rotating electrical machine in a power generation region when the rotational speed during idle operation of the internal combustion engine exceeds a predetermined value. When the operating state and the rotational speed during idling of the internal combustion engine are equal to or less than a predetermined value and the amount of power detected by the power storage monitoring means exceeds a predetermined value, a predetermined value corresponding to the rotation angle detected by the rotation angle detecting means Based on the timing, the second operating state in which the rotating electrical machine is switched between the drive region and the power generation region, the rotational speed during idle operation of the internal combustion engine is equal to or less than a predetermined value, and the storage amount detected by the storage monitoring means is predetermined. At the following time, the rotating electric machine is operated by switching between the drive region and the power generation region based on a timing different from the predetermined timing, and the third operation state is made in which the switching timing can be changed. Since it is comprised, the electrical storage amount of an electrical storage means can be controlled, suppressing the torque fluctuation of an internal combustion engine.

  According to the control device for an internal combustion engine of the present invention, the rotation angle detection means for detecting the rotation angle of the output shaft of the internal combustion engine, and the rotating electrical machine control means for controlling the operation of the rotating electrical machine according to the operating state of the internal combustion engine. And a power storage monitoring means for monitoring the amount of power stored in the power storage means, wherein the rotating electrical machine control means operates the rotating electrical machine in the power generation region when the rotational speed during idle operation of the internal combustion engine exceeds a predetermined value. 1 corresponding to the rotation angle detected by the rotation angle detection means when the rotational speed during the idling operation of the internal combustion engine is equal to or less than a predetermined value and the power storage amount detected by the power storage monitoring means exceeds the predetermined value. A second operating state in which the rotating electrical machine is operated by switching between a drive region and a power generation region based on a predetermined timing, and a storage amount detected by the storage monitoring means when the rotational speed during idling of the internal combustion engine is equal to or less than a predetermined value But When the target value of the generated voltage of the rotating electric machine is different from the target value of the generated voltage of the rotating electric machine in the second operating state, the target value can be changed. Therefore, it is possible to increase the amount of charge to the power storage means while suppressing the torque fluctuation of the internal combustion engine, and to prevent the amount of power stored in the battery from decreasing. it can.

Embodiment 1 FIG.
The control apparatus for an internal combustion engine according to the first embodiment of the present invention includes a rotation angle detection unit that detects a rotation angle of an output shaft of the internal combustion engine, and a rotating electrical machine control that controls the operation of the rotating electrical machine according to the operating state of the internal combustion engine. And a power storage monitoring means for monitoring a power storage amount of the power storage means, wherein the rotating electrical machine control means is configured such that the rotational speed during idling of the internal combustion engine is equal to or lower than a predetermined value and the power storage amount detected by the power storage monitoring means is a predetermined value. In the third operating state, which is the following case, the rotating electrical machine is driven in the drive region based on a timing different from the predetermined timing in the second operating state, which is the case where the charged amount exceeds the predetermined value. Switching between the power generation region and the power generation region, and the switching timing can be changed, and the ratio of the power generation region to the drive region is the drive region in the second operation state. Than the proportion of the power generation region relative to said increasing.

  The change in the switching timing and the increase in the ratio of the power generation region to the drive region are determined by determining the end point of the power generation region in the third operation state as the end of the power generation region in the second operation state. It is performed by extending from the end point of.

  Furthermore, the extension of the end point of the section of the power generation region is set based on a predetermined count value of a counter that operates from the end point of the drive region.

  The predetermined count value of the counter is set based on a map in which a power generation period is set using at least the power storage amount obtained by the power storage monitoring means and the average rotation speed of the internal combustion engine as parameters.

  The ratio of the power generation area to the drive area is increased every ignition cycle of the internal combustion engine.

  Hereinafter, an internal combustion engine control apparatus according to Embodiment 1 of the present invention will be described in detail. 1 is a block diagram of an internal combustion engine control apparatus according to Embodiment 1 of the present invention. In FIG. 1, an engine (hereinafter referred to as an internal combustion engine) 1 that generates torque by combustion of fuel in a cylinder drives a crankshaft by combustion of fuel in a plurality of cylinders, as is well known. A rotational torque is generated from the output shaft 100. A motor generator 4 that is a rotating electrical machine includes a three-phase armature winding (not shown) provided on a stator and a field winding (not shown) provided on the rotor, and the rotor shaft thereof. 400 is connected to the output shaft 100 of the internal combustion engine 1 via a torque transmission means 300 such as a belt.

  The motor generator 4 operates as a generator when the kinetic energy is transmitted from the internal combustion engine 1 to the rotor shaft 400 via the torque transmission means 300 and current is supplied to the field winding. The battery 2 as the power storage means is charged via the motor generator control device 10 as the rotating electrical machine control means, which will be described later, with the three-phase AC power generated in the winding. At this time, the motor generator 4 functions to absorb torque with respect to the output shaft 100 of the internal combustion engine 1. When the motor generator 4 is supplied with current from the battery 2 to the armature winding and the field winding, the motor generator 4 operates as a three-phase AC motor. To the output shaft 100 of the internal combustion engine 1. At this time, the motor generator 4 acts to apply torque to the output shaft 100 of the internal combustion engine 1.

  The battery 2 is connected to the armature winding of the motor generator 4 via a motor generator control device 10 by a wire harness. The current sensor 3 is installed at a terminal of the battery 2 and detects a charging current or a discharging current of the battery 2. The crank angle sensor 5 serving as a rotation angle detecting means is disposed opposite to the outer peripheral surface of the gear 500 fixed to the output shaft 100 of the internal combustion engine 1 via a gap, and the gear 500 is rotated as the output shaft 100 rotates. A pulse generated each time the individual teeth pass through the gap is detected, and the rotation angle of the crankshaft is detected based on the detected pulse.

  The motor generator control device 10 includes torque generation timing setting means 7, torque generation amount setting means 8, torque generation absorption device control means 9, and power storage monitoring means 6. The torque generation timing setting means 7 converts the pulse obtained by the crank angle sensor 5 into a rotation angle when the rotation speed during idling of the internal combustion engine 1 is lower than a predetermined value. The torque generation timing of the motor generator 4 is calculated according to the battery charge amount obtained by 6. The torque generation amount setting means 8 converts the pulse obtained by the crank angle sensor 5 into a rotation angle when the rotation speed during idling of the internal combustion engine 1 is lower than a predetermined value, and based on the rotation angle, A necessary torque generation amount of the motor generator 4 is set.

  The torque generation absorber control unit 9 causes the motor generator 4 to generate torque based on the torque generation timing set by the torque generation timing setting unit 7 and the torque generation amount set by the torque generation amount setting unit 8. The target value of the field current supplied to the field winding of the motor generator 4 and the target value of the phase current supplied to the armature winding are calculated, and a command based on the calculation result is generated to generate the phase current and field Switching control is performed by supplying the current to a switching element (not shown) that controls the current. The storage monitoring means 6 calculates the battery storage amount based on the voltage of the battery 2 and the charging current or discharging current of the battery 2 obtained by the current sensor 3.

  In addition to the torque generation timing setting means 7, torque generation amount setting means 8, torque generation absorption device control means 9, and power storage monitoring means 6 described above, the motor generator control apparatus 10 includes a microcomputer (not shown) CPU, a random access memory (hereinafter referred to as RAM), a read only memory (hereinafter referred to as ROM), an interface circuit (hereinafter referred to as IF circuit), etc., and supplied from the battery 2 A predetermined operation is performed by electric power.

  FIG. 2 is a time chart showing an operation in the control apparatus for an internal combustion engine according to the first embodiment of the present invention when the battery storage amount obtained by the storage monitoring means 6 is higher than a predetermined value. Yes, (a) is the crank angle, (b) is the internal combustion engine speed, (c) is the basic torque generation timing, (d) is the power generation permission flag, (e) is the field current and phase current, (f) is Internal combustion engine torque, (g) indicates motor generator torque, (h) is a power generation start angle / power generation end angle map storing the power generation start angle and power generation end angle, and (i) stores field current and phase current. The field current / phase current map, (j) shows the motor generator torque map storing the motor generator torque generation amount, and (k) shows the internal combustion engine torque map storing the internal combustion engine torque.

  In FIG. 2, the crank angle 11 of the internal combustion engine 1 shown in FIG. 2 (a) changes periodically with the lapse of time t. In the first embodiment, one ignition cycle is set as a basic control cycle. The crank angle 11 is reset every basic period T. The rotational speed 12 of the internal combustion engine 1 shown in (b) changes periodically with the passage of time t, and is indicated by its time average rotational speed 13. The internal combustion engine rotational speed 12 is obtained by time differentiation of the crank angle 11. The internal combustion engine 1 ignites the fuel near the minimum rotational speed, and the rotational speed 12 increases due to the combustion of the fuel.

  The basic torque generation timing 14 of the motor generator 4 shown in (c) of FIG. 2 has a drive region M and a power generation region G. In the drive region M, the motor generator 4 can be driven to operate as an electric motor. In the power generation region G, it indicates that the motor generator 4 can be used as a generator to perform a power generation operation. The crank angle 11 at times t0, t2, and t4 when the basic torque generation timing 14 starts to become the power generation region G is set as the power generation start angle, and the crank angle 11 at times t1 and t3 when the basic torque generation timing 14 starts to become the drive region M. Is the power generation end angle. The drive start angle is equal to the power generation end angle. The basic torque generation timing 14 is determined based on the power generation start angle / power generation end angle map shown in (h) of FIG. 2 stored in the ROM of the motor generator control device 10. The power generation start angle / power generation end angle map shown in (h) of FIG. 2 will be described later.

  The power generation permission flag 15 for determining the power generation operation or drive operation of the motor generator 4 shown in FIG. 2D is the time t0, t2, which is the timing at which the basic torque generation timing 14 changes from the drive region M to the power generation region G. The power generation permission flag 15 is reset to “0” at time t1 and t3 when the basic torque generation timing 14 changes from the power generation region G to the drive region M.

  When the power generation permission flag 15 is “0”, the motor generator 4 is supplied with a field current and a phase current based on the control of the motor generator control device 10 and performs a driving operation as an electric motor. Torque. On the other hand, when the power generation permission flag 15 is “1”, the motor generator 4 is supplied with a field current based on the control of the motor generator control device 10 to perform a power generation operation as a generator, and Absorbs torque.

  A phase current 16 shown in (e) of FIG. 2 is a current flowing in a three-phase coil provided in the stator of the motor generator 3, and a field current 17 is a magnetic field coil provided in the rotor of the motor generator 3. Current flowing through the The operation of motor generator 4 is determined based on the values of phase current 16, field current 17, and battery 2 voltage. The phase current 16 and the field current 17 are controlled by the motor generator control device 10, and the magnitudes of the phase current 16 and the field current 17 are stored in the ROM in the motor generator control device 10 shown in FIG. Determined by phase current map.

  The internal combustion engine torque 18 shown in (f) of FIG. 2 is measured in advance for each average internal combustion engine rotational speed 13 and stored in the ROM of the motor generator control device 10. The internal combustion engine shown in (k) of FIG. Calculated from the engine torque map. The motor generator torque 19 generated by the operation of the motor generator 4 shown in FIG. 2G is based on a motor generator torque map (to be described later) stored in the ROM of the motor generator control device 10 shown in FIG. The magnitude is determined by the phase current 16, the field current 17, and the voltage of the battery 2 output from the motor generator control device 10 based on the calculated torque generation amount.

  By applying or absorbing the motor generator torque 19 with respect to the internal combustion engine torque 18, the torque fluctuation on the output side of the internal combustion engine 1 can be reduced, thereby reducing the vibration of the internal combustion engine 1. The power generation start angle 20 of the motor generator 4 and the power generation end angle 21 of the motor generator 4 in the power generation start angle / power generation end angle map shown in (h) of FIG. 2 are stored in the ROM of the motor generator control device 10. The value is determined based on the average internal combustion engine speed 13.

  The phase current 22 flowing in the three-phase coil of the motor generator 4 and the field current 23 flowing in the field coil of the motor generator 4 in the field current / phase current map shown in FIG. The value is determined by a torque generation amount calculated based on an internal-combustion engine torque map (to be described later) shown in (k) of FIG. 2 stored in the ROM of the generator control device 10.

  In the motor generator torque map shown in FIG. 2J, the X axis indicates the average internal combustion engine speed 13 and the Z axis (not shown) indicates the crank angle 11. The motor generator torque 24 has a value for each unit crank angle, and the value is calculated by linear interpolation of the X axis and the Z axis. The internal combustion engine torque 25 in the internal combustion engine torque map shown in FIG. 2 (k) is measured in advance for each average internal combustion engine rotational speed 13, stored in a ROM in the motor generator control device 10, and fixed. The value is determined based on the internal combustion engine rotational speed 12.

  FIG. 3 is an explanatory diagram showing an operation in the control apparatus for an internal combustion engine according to the first embodiment of the present invention when the battery storage amount obtained by the storage monitoring means 6 is lower than a predetermined value. is there. 3, (a) shows the rotational speed of the internal combustion engine, (b) shows the basic torque generation timing, and corresponds to (b) and (c) of FIG. 2, respectively. 3 (c) shows an extension counter between generators, (d) shows a power generation permission flag, (e) shows a field current and phase current, (f) shows an internal combustion engine torque, and (g) shows a motor generator torque. . (E), (f), and (g) in FIG. 3 correspond to (e), (f), and (g) in FIG. 2, respectively. Also, a power generation start angle / power generation end angle map shown in (h) of FIG. 2, a field current / phase current map shown in (i), a motor generator torque map shown in (j), and an internal combustion engine torque shown in (k). The map is also used in common for the operation shown in FIG.

  In FIG. 3A, the internal combustion engine rotational speed 26 that changes with time has a time-average rotational speed 27. FIG. 3B shows the basic torque generation timing 28 of the motor generator 4. When the power generation permission flag 30 shown in FIG. 3D is “0”, the field generator 32 and the phase current 31 are supplied from the motor generator control device 10 to the motor generator 4 to drive the motor generator 4 as an electric motor. Torque is applied to the internal combustion engine 1. On the other hand, when the power generation permission flag 30 is “1”, the field current 32 is supplied from the motor generator control device 10 to the motor generator 4 to operate the motor generator 4 as a generator and absorb the torque to the internal combustion engine 1. To do.

  In the power generation period extension counter 29 shown in FIG. 3C, the power generation permission flag 30 is set to “1” at the time t0 when the basic torque generation timing changes from the drive region M to the power generation region G. Set to a predetermined value. The power generation permission flag 30 is configured not to be reset until the count value of the power generation period extension counter 29 reaches 0. Therefore, the power generation permission flag 30 that is set to “1” has the time t0 to t5, t2 to t2. During the predetermined period of t6, “1” is maintained, and the period when the power generation permission flag 30 is “1” is t1 to t5 and t3 to t6 as compared with the case where the battery storage amount shown in FIG. 2 is higher than the predetermined value. Will be extended.

  Here, the predetermined value set by the power generation period extension counter 29 is set to a time longer than the time to reach the power generation end angle from the power generation start angle of the basic torque generation timing 28. In this way, as compared with the power generation permission flag 15 in the case where the battery power storage amount shown in FIG. 2 is higher than the predetermined value, the period during which the power generation permission flag 30 is “1” can be extended. When the battery storage amount obtained by 5 is lower than a predetermined value, the period during which the motor generator 4 is in the power generation state can be extended.

  Next, the control operation as an electric motor of the control apparatus for an internal combustion engine according to Embodiment 1 of the present invention will be described based on the flowcharts shown in FIGS. 4, 5, 6, 7, and 8. FIG. 4 shows an operation state determination routine. First, in step S101, it is determined whether or not the internal combustion engine 1 is in idle operation. If the engine is in idle operation (Yes), the process proceeds to step S102. If the vehicle is not idling but is traveling (No), the routine proceeds to step S104 to execute normal internal combustion engine control for operating the motor generator 4 in the power generation state, and the first operating state flag is set to “1”.

  In step S102, the internal combustion engine rotational speed Ne is compared with the motor control execution determination internal combustion engine rotational speed Nei. If the internal combustion engine rotation speed Ne is greater than the motor control execution determination internal combustion engine rotation speed Nei (No), it is determined that it is not necessary to execute the motor control, and the process proceeds to step S104 to depend on the normal internal combustion engine control. The first operating state flag is set to “1”. If the internal combustion engine rotation speed Ne is smaller than the motor control execution determination internal combustion engine rotation speed Nei (Yes), it is determined that it is necessary to suppress the torque fluctuation of the internal combustion engine 1 that occurs due to a decrease in the idle rotation speed, and the motor control is performed. Go to step S103.

  In step S103, it is determined whether or not the storage amount of the battery 2 has decreased. When the stored amount of power obtained by the stored power monitoring means 6 is smaller than a predetermined stored amount of energy (Yes), the stored amount of battery is reduced, and the power stored in the battery 2 is changed by changing the motor control. It is determined that the amount needs to be increased, the process proceeds to step S106, and the third operation state flag is set to “1”. On the other hand, when the amount of electricity obtained by the electricity storage monitoring means 6 is larger than a predetermined amount of electricity stored in advance (No), the amount of electricity stored in the battery 2 has not decreased, and it is necessary to change the motor control. If it is determined that there is not, the process proceeds to step S105, and the second operation state flag is set to “1”.

  Next, in step S107, it is determined whether or not the first operating state flag is “1”. If the flag is “1” (Yes), the process proceeds to step S108 and is subordinate to normal internal combustion engine control. . On the other hand, if the first operating state flag is “0”, the process proceeds to step S109, and jumps to the motor control arithmetic processing routine shown in FIG. 5 in order to execute the motor control.

  In step S201, the motor control calculation processing routine shown in FIG. 5 jumps to the torque generation timing calculation processing routine shown in FIG. 6 in order to determine whether or not to allow power generation by the motor generator 4. Perform the action. That is, in FIG. 6, in step S301, the rotational speed of the internal combustion engine 1 is calculated based on the crank angle detected by the crank angle sensor 5, and the process proceeds to step S302.

  In step S302, in the torque generation timing setting means 7, the power generation start angle for starting the power generation of the motor generator 4 and the power generation end angle for ending the power generation of the motor generator 4 are used with the average internal combustion engine rotation speed as a parameter. And it specifies from the basic torque generation timing map shown in FIG. 10, and progresses to step S303. The basic torque generation timing maps shown in FIGS. 9 and 10 correspond to the power generation start angle / power generation end angle map shown in FIG.

  Next, in step S303 of FIG. 6, it is determined whether or not the third operation state flag described in the flowchart of FIG. 4 is “0” (the second operation state flag is “1”). If the third operation state flag is “0” (No), it is determined that the storage amount has not decreased, and the process proceeds to step S304 to execute the motor control. In step S304, it is determined whether the crank angle obtained by the crank angle sensor 5 is within the range of the power generation end angle from the power generation start angle set in step S302. If it is within the range (Yes), step S305 is performed. The power generation permission flag is set to “1”, and when it is out of range (No), the process proceeds to step S306, the power generation permission flag is reset to “0”, and the motor control calculation processing routine of FIG. Return.

  If it is determined in step S303 in FIG. 6 that the third operating state flag is “1” (Yes), it is determined that the amount of stored power has decreased, and the process proceeds to step S307. In step S307, if the previous power generation permission flag is “0”, the motor control is changed, and the process jumps to the power generation period extension control routine shown in FIG. 7 to extend the period of the power generation state. If the previous power generation permission flag is “1”, the process proceeds to step S304 to execute the motor control.

  When jumping to the power generation period extension control routine shown in FIG. 7, in step S401, is the crank angle obtained by the crank angle sensor 5 within the range of the power generation end angle from the power generation start angle set in step S302 of FIG. If it is within the range (Yes), the process proceeds to step S402, jumps to the power generation permission count routine shown in FIG. 8, and if it is out of the range (No), the process proceeds to step S403.

  When jumping to the power generation permission count routine shown in FIG. 8, in step S501, the time when the power generation permission flag changes from “0” to “1”, that is, the time when the motor generator 4 changes from the drive region M to the power generation region G is detected. To do. If the time when the motor generator 4 changes from the drive region M to the power generation region G (Yes), the process proceeds to step S502, the power generation permission counter is set to a predetermined value, which will be described later, and the drive region M changes to the power generation region G. If it is not the time (No), the power generation permission counter is subtracted (stops when it becomes 0), and the process returns to the flowchart of FIG.

  The predetermined value of the power generation permission counter that is the power generation period of the motor generator 4 is specified from the control map using the power storage amount obtained by the power storage monitoring means 6 and the internal combustion engine rotation speed as parameters. That is, the predetermined value of the power generation permission counter is determined based on the amount of electricity stored and the internal combustion engine speed based on the map stored in the ROM of the motor generator control device 10. FIG. 11 is a power generation period map set for each arbitrary internal combustion engine rotation speed, where the X-axis indicates the amount of power storage and the Y-axis indicates the power generation period. This power generation period map is provided for each rotation speed of the internal combustion engine, and the predetermined value of the power generation permission counter is calculated as a predetermined value corresponding to the charged amount from the map corresponding to the rotation speed of the internal combustion engine.

  Next, in step S403 of the power generation period extension control routine shown in FIG. 7, if the power generation permission counter is 0, it is determined that the power generation state can be terminated, and the power generation permission flag is reset to “0”. If not, the power generation permission flag is set to "1", and the process returns to the motor control arithmetic processing routine flowchart shown in FIG.

  Returning to the motor control calculation processing routine shown in FIG. 5, in step S202, the torque generation amount of the motor generator 4 necessary for reducing the vibration in the torque generation amount setting means 8 is determined as the rotational speed of the internal combustion engine 1. And the angle based on the internal combustion engine torque map and the motor generator torque map. In the ROM (not shown) in the motor generator control device 10, the torque of the internal combustion engine 1 measured for each rotational speed as described above is stored as an internal combustion engine torque map shown in FIG. As described above, the torque amount of the motor generator 4 generated when the rotational speed, the field current of the motor generator 4 and the phase current of the motor generator 3 are changed in the ROM is also shown in FIG. It is stored as a motor generator torque map shown.

  Next, in step S203, based on the torque generation amount of the motor generator 4 set in step S202, the target values of the field current and the phase current necessary for the operation of the motor generator 4 are shown in (i) of FIG. Calculation is performed based on the magnetic current / phase current map, and the process proceeds to step S204 to determine whether or not the power generation permission flag is “1”. If the power generation permission flag is “1” (Yes), the process proceeds to step S205 to operate the motor generator 4 as a generator. If the power generation permission flag is not “1” (No), the process proceeds to step 206 and the motor The generator 4 is operated as an electric motor.

  As described above, according to the control apparatus for an internal combustion engine according to the first embodiment of the present invention, when the amount of power stored in battery 2 is smaller than a predetermined value when executing motor control, the contents of motor control are By changing the change timing of the power generation state and the drive state, and by extending the power generation end time according to a preset power generation period, the period of the power generation region with respect to the period of the drive region of the motor generator 4 is increased. As a result of being able to increase the ratio, it is possible to lengthen the charging period of the battery while suppressing vibrations generated by the internal combustion engine 1, and to prevent the amount of power stored in the battery from excessively decreasing. Can do.

Embodiment 2. FIG.
A control apparatus for an internal combustion engine according to Embodiment 2 of the present invention includes a rotation angle detection unit that detects a rotation angle of an output shaft of the internal combustion engine, and a rotary electric machine control that controls the operation of the rotary electric machine according to the operating state of the internal combustion engine. And a power storage monitoring means for monitoring a power storage amount of the power storage means, wherein the rotating electrical machine control means is configured such that the rotational speed during idling of the internal combustion engine is equal to or lower than a predetermined value and the power storage amount detected by the power storage monitoring means is a predetermined value. In the third operating state, which is the following case, the rotating electrical machine is driven in the drive region based on a timing different from the predetermined timing in the second operating state, which is the case where the charged amount exceeds the predetermined value. Switching between the power generation region and the power generation region, and the switching timing can be changed, and the ratio of the power generation region to the drive region is the drive region in the second operation state. The change of the switching timing and the increase of the ratio of the power generation region to the drive region are set with the average rotation speed of the internal combustion engine as a parameter and the power generation start angle and the power generation end angle. It is performed by setting the power generation area based on the map.

  The ratio of the power generation area to the drive area is increased every ignition cycle of the internal combustion engine.

  Next, a control device for an internal combustion engine according to Embodiment 2 of the present invention will be described. FIG. 12 is a time chart for explaining the operation in the case where the battery storage amount obtained by the storage monitoring means 6 is lower than a predetermined value in the control device according to Embodiment 2 of the present invention. (A) is an internal combustion engine rotation speed, (b) is a basic torque generation timing, (c) is a second torque generation timing described later, (d) is a power generation permission flag, (e) is a field current and a phase current, ( f) shows the internal combustion engine torque, (g) shows the motor generator torque, and (h) shows a power generation start angle / power generation end angle map in which the power generation start angle and the power generation end angle are stored.

  In the control device according to the second embodiment of the present invention, the time chart in the case where the battery storage amount obtained by the storage monitoring means 6 is higher than a predetermined value is shown in the first embodiment. It is equal to the time chart of FIG.

  Hereinafter, with respect to the control device of the second embodiment, the operation of the motor control device for the internal combustion engine when the battery storage amount obtained by the power storage monitoring means 6 is lower than a predetermined value will be described with reference to FIG. A description will be given mainly of parts different from the time chart in the first embodiment.

  In FIG. 12A, the internal combustion engine rotational speed 35 that changes with time has a time average rotational speed 36. The basic torque generation timing 14 of the motor generator 4 shown in (b) is the same as the basic torque generation timing when the battery storage amount shown in (c) of FIG. 2 in the first embodiment is higher than a predetermined value. It has a drive region M and a power generation region G, and in the drive region M, it indicates that the motor generator 4 can be driven as an electric motor, and in the power generation region G, the motor generator 4 It is shown that the power generation operation can be performed using as a generator. The second torque generation timing 37 shown in FIG. 12C is the torque generation timing of the motor generator 4 when the battery storage amount obtained by the storage monitoring means 6 is lower than a predetermined value. A region G is included.

  When the power generation permission flag 38 shown in FIG. 12D is “0”, a field current and a phase current are supplied from the motor generator control device 10 to the motor generator 4 and driven as an electric motor, and torque is applied to the internal combustion engine 1. Give. On the other hand, when the power generation permission flag 38 is “1”, a field current is supplied from the motor generator control device 10 to the motor generator 4 to operate as a generator, and the internal combustion engine 1 absorbs torque.

  At time t01 when the second torque generation timing 37 changes from the drive region M1 to the power generation region G1, the power generation permission flag 38 is set to “1”, and the second basic torque timing 37 changes from the power generation region G to the drive region M. The power generation permission flag 38 is reset to "0" at time t11, which is the timing when the time changes to.

  As shown in FIG. 12 (c), the second torque generation timing 37 is the basic torque generation timing shown in FIG. 2 (c) in the first embodiment of the present invention, that is, (b) of FIG. The difference between the power generation start angle and the power generation end angle is set to be larger than the basic torque generation timing shown in FIG. The power generation start angle and the power generation end angle are determined based on the power generation start angle / power generation end angle map stored in the ROM of the motor generator control device 8 shown in FIG. As a result of setting the period of “1” to be a long period of time from t1 to t11, the battery storage amount is larger than the period from t0 to t1, which is a power generation period when the battery storage amount is higher than a predetermined value. The period from t01 to t11, which is the power generation period in the case where it is lower than the predetermined value, is lengthened.

  The operation of the internal combustion engine control apparatus according to the second embodiment of the present invention as the motor control is only the torque generation timing calculation process at step S201 in the motor control process routine explained in FIG. 5 of the first embodiment. Different.

  Next, the operation of the torque generation timing calculation processing routine will be described using the flowchart shown in FIG. When step S201 in the flowchart shown in FIG. 5 in the first embodiment jumps to the torque generation timing calculation processing routine shown in FIG. 13, first, based on the crank angle obtained by the crank angle sensor 5 in step S601. Then, the rotational speed of the internal combustion engine 1 is calculated. Next, the process proceeds to step S602, and it is determined whether or not the third operation state flag in step S106 shown in FIG. 4 is “0” (the second operation state flag is “1”). As a result of the determination, if the third operating state flag is “0”, as described with reference to FIG. 4, as a result of determining whether or not the storage amount of the battery 2 has decreased in step S103, the storage monitoring means 6 This means that it has been determined that the amount of stored electricity is not smaller than a predetermined amount of stored electricity. Therefore, it is determined that the amount of stored electricity has not decreased, and the process proceeds to step S603.

  If it is determined in step S602 that the amount of power storage has not decreased, the torque generation timing setting means 7 causes the power generation start angle for starting the power generation of the motor generator 4 and the end of power generation for ending the power generation of the motor generator 4. The angle is specified based on the basic torque generation timing map shown in FIGS. 9 and 10 using the average internal combustion engine rotational speed as a parameter so as to form the basic torque generation timing shown in FIG.

  On the other hand, as a result of the determination in step 602, when it is determined that the third operation state flag is not “0”, that is, “1”, it is determined that the storage amount is decreasing, and the process proceeds to step 604. In step S604, in the torque generation timing setting means 7, the power generation start angle for starting the power generation of the motor generator 4 and the power generation end angle for ending the power generation of the motor generator 4 are set with the average internal combustion engine rotation speed as a parameter. And the second torque generation timing map shown in FIG. The difference between the power generation start angle and the power generation end angle in the second torque generation timing map shown in FIGS. 14 and 15, that is, the period of the current generation region G of the motor generator 4 is the power generation in the basic torque generation timing map shown in FIGS. 9 and 10. It is set to be larger than the difference between the start angle and the power generation end angle.

  Next, proceeding to step S605, it is determined whether or not the crank angle obtained by the crank angle sensor 5 is within the range of the power generation end angle from the power generation start angle set at step S603 or step S604. If so, the process proceeds to step S606, and the power generation permission flag is set to "1". If it is out of range, the process proceeds to step S607, the power generation permission flag is reset to "0", and the motor control calculation process shown in FIG. The process returns to step S202 of the routine.

  As described above, according to the control apparatus for an internal combustion engine according to the second embodiment of the present invention, when the amount of power stored in battery 2 is smaller than a predetermined value when executing motor control, the content of motor control is changed. As a result, the switching timing between the power generation region and the drive region can be made variable, and the power generation start timing and power generation end of the motor generator 4 set according to the crank angle between the ignition cycles according to a preset second torque generation timing map. By increasing the time interval, the ratio of the power generation period to the drive period of the motor generator 4 can be increased. As a result, the charging period of the battery 2 is lengthened while suppressing the vibration generated by the internal combustion engine 1. Thus, it is possible to prevent the amount of power stored in the battery from being excessively reduced.

Embodiment 3 FIG.
A control apparatus for an internal combustion engine according to Embodiment 3 of the present invention includes a rotation angle detection unit that detects a rotation angle of an output shaft of the internal combustion engine, and a rotating electrical machine control that controls the operation of the rotating electrical machine according to the operating state of the internal combustion engine. And a rotation speed instantaneous value calculation means for calculating an instantaneous value of the rotation speed of the internal combustion engine in a predetermined section shorter than the ignition cycle of the internal combustion engine. The control means is configured such that when the rotation speed during idling of the internal combustion engine is equal to or less than a predetermined value and the charge amount detected by the charge monitoring means is equal to or less than the predetermined value, the charge amount exceeds the predetermined value. The rotating electric machine is switched between the drive region and the power generation region based on a timing different from the predetermined timing in the second operation state, and the switching timing is And the ratio of the power generation region to the drive region is increased more than the ratio of the power generation region to the drive region in the second operation state, and the change in the switching timing is The ratio of the power generation area to the drive area is increased by stopping the power generation of the rotating electrical machine when the rotation speed instantaneous value calculated by the rotation speed instantaneous value calculation means becomes equal to or less than a predetermined instantaneous rotation speed value. It is said.

The predetermined instantaneous rotational speed value is set based on at least the amount of electricity stored obtained by the electricity storage monitoring means.

  The increase in the ratio of the power generation area to the drive area is performed every ignition cycle of the internal combustion engine.

  Next, a control device for an internal combustion engine according to Embodiment 3 of the present invention will be described. FIG. 16 is a time chart showing the operation when the battery storage amount obtained by the storage monitoring means 6 is lower than a predetermined value in the control device according to Embodiment 3 of the present invention. Rotational speed of internal combustion engine, (b) is basic torque generation timing, (c) is generator period extension flag, (d) is power generation permission flag, (e) is field current and phase current, (f) is internal combustion engine torque , (G) show the motor generator torque, respectively. In the third embodiment, the time chart when the battery storage amount obtained by the power storage monitoring means 6 is higher than a predetermined value is the time chart in the first embodiment of the present invention shown in FIG. be equivalent to.

  Hereinafter, the operation of the control device for the internal combustion engine when the battery storage amount obtained by the storage monitoring means 6 using FIG. 16 is lower than a predetermined value will be described in the first embodiment of the present invention shown in FIG. The difference from the time chart in FIG.

  In FIG. 16A, 45 represents the instantaneous internal combustion engine rotation speed, and 46 represents the power generation stop instantaneous internal combustion engine rotation speed. The basic torque generation timing 47 of the motor generator 4 shown in FIG. 16B is the basic torque generation timing when the battery charge amount shown in FIG. 2C in the first embodiment is higher than a predetermined value. It is the same and has a drive region M and a power generation region G. When the drive region M, the motor generator 4 can be driven as an electric motor, and when the power generation region G, It shows that the motor generator 4 can be used as a generator to perform a power generation operation.

  When the power generation permission flag 49 shown in FIG. 16D is “0”, a field current and a phase current are supplied from the motor generator control device 10 to the motor generator 4 and driven as an electric motor, and torque is applied to the internal combustion engine 1. On the other hand, when the power generation permission flag 49 is “1”, a field current is supplied from the motor generator control device 10 to the motor generator 4 to operate as a generator and absorb torque to the internal combustion engine 1.

  In the power generation extension flag 48 shown in FIG. 16C, the power generation permission flag 49 is set to “1” at the time t0 when the basic torque generation timing 47 changes from the drive region M to the power generation region G, and the basic torque At the same time t1 when the generation timing 47 is changed from the power generation region G to the drive region M, the time is set to “1” and the instant t11 when the instantaneous internal combustion engine rotational speed 45 becomes smaller than the power generation stop instantaneous internal combustion engine rotational speed 46. In the meantime, the power generation extension flag 48 is not reset to “0”.

  Since the power generation permission flag 49 cannot be reset to “0” while the power generation extension flag 48 is “1”, the period during which the power generation permission flag 49 is “1” can be extended from t1 to t11. As a result, the period from the power generation period t0 to t11 in the case where the battery storage amount is lower than the predetermined value is prolonged compared to the period from t0 to t1 in the case where the battery storage amount is higher than the predetermined value. The Rukoto.

  The operation at the time of control of the internal combustion engine according to the third embodiment of the present invention is different only in the power generation period extension control routine in step S308 in the torque generation timing calculation processing routine shown in FIG. 6 in the first embodiment. .

  The operation of the power generation period extension control routine will be described below using the flowchart shown in FIG. In the flowchart shown in FIG. 6, when jumping to the power generation period extension processing routine shown in FIG. 17 in step S308, first, in step S701, the crank angle obtained by the crank angle sensor 5 is changed to step S302 in FIG. It is determined whether it is within the range of the power generation end angle from the power generation start angle set in Step 1. If it is within the range (Yes), the process proceeds to Step S702, and if it is out of the range (No), the process proceeds to Step S703.

  In step S702, a time point when the power generation permission flag 49 changes from “1” to “0”, that is, a time point when the motor generator 4 changes from the power generation region G to the drive region M is detected. If the motor generator 4 has changed from the power generation region G to the drive region G (Yes), the process proceeds to step S704, where the power generation extension flag 48 is set to "1". If it is not the time when the motor generator 4 changes from the power generation region G to the drive region G (No), the process proceeds to step S710, the power generation permission flag 49 is set to "1", and the process returns to the flowchart of FIG.

  If the power generation extension flag 48 is set to “1” in step S704, the process proceeds to step S705, where the average rotation in a predetermined section shorter than the ignition process section is based on the crank angle obtained from the crank angle sensor 5. The instantaneous rotational speed Ner, which is the speed, is calculated. Next, in step S706, the power generation stop instantaneous rotation speed Nej is calculated from the control map shown in FIG. 18 using the battery storage amount obtained by the storage monitoring means 6 as a parameter.

  Next, in step S707, the instantaneous rotation speed Ner calculated in step S705 is compared with the power generation stop instantaneous rotation speed Nej calculated in step S706. As a result, when Ner ≦ Nej (Yes), since the instantaneous rotational speed Ner is lower than the power generation stop instantaneous rotational speed Nej, it is determined that when the motor generator 4 generates power, the internal combustion engine speed decreases due to the power generation load. In step S708, the power generation extension flag is reset to “0”. In step S709, the power generation permission flag is reset to “0”, and the process returns to the flowchart of FIG.

  On the other hand, as a result of the comparison in step S707, if Ner> Nej (No), the instantaneous rotation speed Ner is higher than the power generation stop instantaneous rotation speed Nej. Therefore, when the generator 4 generates power, the motor generator 4 generates power. Then, the torque of the internal combustion engine 1 is absorbed and it is possible to suppress the increase in the rotational speed of the internal combustion engine, and it is determined that the battery 2 can be charged. The process proceeds to step S710 and the power generation permission flag is set. “1” is set, and the process returns to the flowchart of FIG.

  According to the control device for an internal combustion engine according to the third embodiment of the present invention described above, when the amount of power stored in the battery 2 is smaller than a predetermined value when the motor control is executed, by changing the content of the motor control, By changing the switching timing between the power generation region and the drive region, and extending the power generation end timing of the motor generator 4 until the instantaneous internal combustion engine rotation speed becomes lower than the preset power generation stop instantaneous internal combustion engine rotation speed, the motor generator As a result, the ratio of the power generation period to the drive period of 4 can be increased. As a result, the charging period to the battery 2 can be lengthened while suppressing the vibration generated by the internal combustion engine 1, and the amount of charge of the battery can be reduced. It can prevent falling too much.

Embodiment 4 FIG.
A control apparatus for an internal combustion engine according to Embodiment 4 of the present invention includes a rotation angle detection unit that detects a rotation angle of an output shaft of the internal combustion engine, and a rotating electrical machine control that controls the operation of the rotating electrical machine according to the operating state of the internal combustion engine. And a power storage monitoring means for monitoring a power storage amount of the power storage means, wherein the rotational speed during idling of the internal combustion engine is equal to or less than a predetermined value and the power storage amount detected by the power storage monitoring means is equal to or less than a predetermined value. In the third operation state, the target value of the generated voltage of the rotating electrical machine is set to a value different from the target value of the generated voltage of the rotating electrical machine in the second operating state in which the amount of stored electricity exceeds a predetermined value. The target value can be changed.

  The target value of the generator is set based on a deviation between a stored amount of the power storage means detected by the power storage monitoring means and a predetermined value.

  Further, a field current correcting means for correcting the field current of the rotating electrical machine is provided, and the field current of the rotating electrical machine is corrected based on the target value of the generated voltage in the third operating state.

Next, a control device for an internal combustion engine according to Embodiment 4 of the present invention will be described. FIG. 19 is a block diagram of an internal combustion engine control apparatus according to Embodiment 4 of the present invention. In FIG. 19, the motor generator control device 59 outputs a signal for controlling the motor generator 4. The power generator monitoring unit 54, the torque generation timing setting unit 55, the torque generation amount setting unit 56, and the torque A generator / absorber controller 57 and a field current corrector 58 are provided.
In addition to these means 54 to 58, a CPU, a RAM, a ROM, an IF circuit, and the like (not shown) are provided, and a predetermined operation is performed by power supplied from the battery 2. Other configurations are the same as those of the control device for the internal combustion engine shown in the first embodiment shown in FIG.

  The power storage monitoring unit 54 calculates the amount of power stored in the battery 2 based on the voltage of the battery 2 and the charging current or discharging current of the battery 2 obtained by the current sensor 3. The torque generation timing setting means 55 converts the pulse obtained by the crank angle sensor 5 into a rotation angle when the rotation speed when the internal combustion engine 1 is idle is lower than a predetermined value. Is calculated.

  The torque generation amount setting means 56 sets a necessary torque generation amount based on the rotation angle obtained by the crank angle sensor 5 when the rotation speed of the internal combustion engine 1 when idling is lower than a predetermined value. . The torque generation absorption device control means 57 is a field for causing the motor generator 4 to generate torque based on the torque generation timing set by the torque generation timing setting means 55 and the torque generation amount set by the torque generation amount setting means 56. The target values of the magnetic current and the phase current are calculated, and the command is given to the motor generator 4. The field current correction means 58 corrects the field current set in the torque generation absorber control means 57 according to the target voltage.

  FIG. 20 is a time chart showing the operation of the control device for an internal combustion engine in the fourth embodiment of the present invention, and shows a case where the battery storage amount obtained by the storage monitoring means 54 is lower than a predetermined value. This corresponds to FIG. 3 in the case of the first embodiment. 20 (a) is the internal combustion engine speed, (b) is the basic torque generation timing, (c) is the power generation permission flag, (d) is the battery voltage, (e) is the target voltage, and (f) is the field current. Correction coefficient, (g) indicates field current and phase current, (h) indicates internal combustion engine torque, and (i) indicates motor generator torque. The time chart in the case where the battery storage amount obtained by the storage monitoring means 54 is higher than a predetermined value is equal to the time chart in the first embodiment of the present invention shown in FIG.

  Next, based on FIG. 20, the operation of the control apparatus for the internal combustion engine when the battery storage amount obtained by the storage monitoring means 54 is lower than a predetermined value is shown in FIG. A description will be given mainly of parts different from the time chart in FIG. As shown in FIG. 20A, the internal combustion engine rotational speed 60 that changes with time includes a time average rotational speed 61.

  The basic torque generation timing 62 of the motor generator 4 shown in (b) of FIG. 20 has a drive region M and a power generation region G. When the motor generator 4 is in the drive region M, the motor generator 4 can be driven as an electric motor. In the power generation region G, the motor generator 4 can be used as a generator to perform a power generation operation. The crank angle 11 at times t0, t2, and t4 when the basic torque generation timing 62 starts to become the power generation region G is set as the power generation start angle, and the crank angle 11 at times t1 and t3 when the basic torque generation timing 14 starts to become the drive region M. Is the power generation end angle. The drive start angle is equal to the power generation end angle.

  When the power generation permission flag 63 shown in (c) of FIG. 20 is “0”, a field current and a phase current are supplied from the motor generator control device 59 to the motor generator 4 to drive the motor generator 4 as an electric motor. Torque is applied to 1. On the other hand, when the power generation permission flag 63 is “1”, a field current is supplied from the motor generator control device 59 to the motor generator 4 to operate the motor generator 4 as a generator and absorb the torque to the internal combustion engine 1. .

  The power generation permission flag 63 is set to “1” at time t0 when the basic torque generation timing 62 changes from the drive region M to the power generation region G, and the basic torque generation timing 62 changes from the power generation region G to the drive region M. The power generation permission flag 63 is reset to “0” at time t1, which is the timing at which the change is made.

  In FIG. 20 (d), 64 indicates a reference battery voltage that can be determined to be a state in which the stored amount of the battery 2 is not reduced, and 65 indicates an actual battery voltage. The target voltage 66 shown in (e) is set when the power generation permission flag 63 is “1”. The field current correction coefficient 67 shown in (f) is calculated according to the target voltage 66. A field current 69 shown in (g) represents a field current corrected by the field current correction coefficient 67.

  The field current correction coefficient 67 is calculated according to the target voltage 66 calculated from the difference between the reference battery voltage 64 and the actual battery voltage 65 when the power generation permission flag 63 is “1”. Since the coefficient is set so that the field current 69 increases when the battery voltage 65 decreases and the target voltage 66 is high, the field current 69 increases in accordance with the target voltage 66 during the power generation region G. As a result, the field current when the battery charge amount is lower than the predetermined value is increased compared to the field current when the battery charge amount is higher than the predetermined value. Reference numeral 68 denotes a phase current flowing through the armature winding of the motor generator 4.

  Since the operation of the control apparatus for an internal combustion engine according to the fourth embodiment of the present invention is different from the operation state determination routine shown in FIG. 4 in the first embodiment, the motor control calculation processing routine is different. The following description of the operation of the control apparatus for an internal combustion engine according to the fourth embodiment of the present invention will be focused on the different parts using the flowcharts of FIGS. 21, 22, and 23.

  In the flowchart shown in FIG. 4 described above, when the process jumps from step S109 to the motor control calculation process routine shown in FIG. 21, the process jumps to the torque generation timing calculation process routine shown in FIG. 22 in step S801. In FIG. 22, in step S <b> 901, the rotational speed of the internal combustion engine 1 is calculated based on the crank angle calculated from the crank angle sensor 5. In step S902, the torque generation timing setting means 55 uses the average internal combustion engine rotational speed 61 as a parameter for the power generation start angle for starting the power generation of the motor generator 4 and the power generation end angle for ending the power generation of the motor generator 4. The power generation start angle / power generation end angle map shown in FIG. 2H is specified, and the process proceeds to step S903.

  In step S903, it is determined whether or not the crank angle obtained by the crank angle sensor 5 is within the range of the power generation end angle from the power generation start angle set in step S902. If it is within the range (Yes), Proceeding to step S904, the power generation permission flag 63 is set to "1". When the crank angle obtained by the crank angle sensor 5 is outside the range of the power generation end angle from the power generation start angle set in step S902 (No), the process proceeds to step S905, and the power generation permission flag 63 is reset to “0”. To return to the motor control calculation processing routine of FIG.

  When returning to the motor control calculation routine of FIG. 21, in step S802, the torque generation amount setting means 56 determines the torque generation amount of the motor generator 4 necessary for reducing the vibration, and the rotational speed and angle of the internal combustion engine 1. Calculate from. In a ROM (not shown) in the motor generator control device 59, the torque of the internal combustion engine 1 measured for each rotational speed of the internal combustion engine 1 is stored. The ROM stores a field current / phase current map shown in FIG. 2 (i) and a motor generator torque map shown in (j). A torque amount of the motor generator 4 generated when the field current and the phase current of the motor generator 4 are changed is calculated based on these maps.

  Next, in step S803, based on the torque generation amount set in step S802, the field current and phase current target values necessary for the operation of the motor generator 4 are calculated, and then the process proceeds to step S804, where It is determined whether or not the third operation state flag is “1”. As a result of the determination, if the third operating state flag is “1” (Yes), it is determined that the amount of power stored in the battery 2 has decreased, and the process proceeds to step S805 to correct the field current 69. Jump to the field current correction calculation processing routine shown in FIG. If the result of determination in step S804 is that the third operating state flag is “0” (No), processing proceeds to step S806.

  When jumping to the field current correction coefficient calculation processing routine of FIG. 23, it is determined in step S1001 whether or not the power generation permission flag is “1”. If the power generation permission flag is “1” (Yes), step S1001 is performed. Proceeding to S1002, if the power generation permission flag is “0” (No), the process returns to the motor control calculation processing routine of FIG.

  In step S1002, the battery voltage Vb is read, and the process proceeds to step S1003. In step S1003, the target voltage TVb is set by the control map shown in FIG. 24 using the difference (ΔVb) between the preset reference battery voltage Vbs and the battery voltage Vb read in step S1002 as a parameter. When the storage amount is reduced, since the battery voltage Vb is reduced, the difference (ΔVb) between the preset reference battery voltage Vbs and the battery voltage Vb is increased. As a result, the target voltage TVb is increased.

  In step S1004, a field current correction coefficient for correcting the target value of the field current set in step S803 of the motor control calculation routine of FIG. 21 is set from the control map shown in FIG. 25 using the target voltage TVb as a parameter. Then, the process proceeds to step S1005. In step S1005, the target value of the field current after the correction calculation is calculated based on the target value of the field current set in step S803 and the field current correction coefficient 67 set in step S1004, and the flowchart shown in FIG. Return.

  Returning to the motor control calculation routine of FIG. 21, in step S806, it is determined whether or not the power generation permission flag is “1”. If the power generation permission flag is “1” (Yes), the motor generator 4 is operated as a generator, and if not (No), the motor generator 4 is operated as an electric motor.

  As described above, according to the control apparatus for an internal combustion engine according to the fourth embodiment of the present invention, when the amount of power stored in battery 2 is smaller than a predetermined value when executing motor control, the content of motor control is changed. Thus, when the target value of the generated voltage of the electric motor is variable and the motor generator 4 is in the driving period, it is possible to increase and correct the field current amount of the motor generator 4 by increasing the target voltage. As a result, it is possible to increase the amount of charge to the battery while suppressing vibrations generated by the internal combustion engine 1, and it is possible to prevent the amount of charge stored in the battery from excessively decreasing.

Modified Examples of Embodiments 1 to 4 In Embodiments 1 to 4, the power storage device is shown as the battery 2, but the power storage device may be realized by a capacitor.

  In the first to fourth embodiments, the crank angle detection means 5 is shown as an angle sensor. However, the crank angle detection means 5 is periodically sent from the control device of the internal combustion engine 1 to the torque generation timing setting means. You may implement | achieve by transmitting.

  In the first to fourth embodiments, the crank angle detecting means 5 is shown as an angle sensor. However, the crank angle detecting means 5 may be realized by a rotation cycle sensor.

  Furthermore, although the crank angle detection means 5 was shown as an angle sensor in Embodiment 1-4, you may implement | achieve the crank angle detection means 5 with a rotational speed sensor.

  In the first to fourth embodiments, the crank angle detection means 5 is shown as an angle sensor. However, the crank angle detection means 5 may be realized by a torque sensor that detects the output torque of the internal combustion engine 1.

  In the first to fourth embodiments, the crank angle detecting means 5 is shown as an angle sensor. However, the crank angle detecting means 5 may be realized by an in-cylinder pressure sensor of the internal combustion engine 1.

1 is a configuration diagram of a control device for an internal combustion engine according to Embodiment 1 of the present invention. FIG. 4 is a time chart showing an operation of the control device for an internal combustion engine according to the first embodiment of the present invention when the charged amount is higher than a predetermined value. 6 is a time chart showing an operation of the control device for an internal combustion engine according to the first embodiment of the present invention when the storage amount is lower than a predetermined value. It is a flowchart which shows the driving | running state determination routine of the apparatus in Embodiment 1 of this invention. It is a flowchart of the motor arithmetic processing routine of the apparatus in Embodiment 1 of this invention. It is a flowchart of the torque generation timing calculation processing routine of the apparatus in Embodiment 1 of this invention. It is a flowchart of the electric power generation period extension process routine of the apparatus in Embodiment 1 of this invention. It is a flowchart of the electric power generation permission count processing routine of the apparatus in Embodiment 1 of this invention. It is a basic torque generation timing map of the apparatus in Embodiment 1 of this invention. It is a basic torque generation timing map of the apparatus in Embodiment 1 of this invention. It is the electric power generation period map of the apparatus in Embodiment 1 of this invention. It is a time chart which shows the operation | movement in case the electrical storage amount of the apparatus in Embodiment 2 of this invention is lower than predetermined value. It is a flowchart of the torque generation timing calculation processing routine of the apparatus in Embodiment 2 of this invention. It is a basic torque generation timing map of the apparatus in Embodiment 2 of this invention. It is a basic torque generation timing map of the apparatus in Embodiment 2 of this invention. It is a time chart which shows the operation | movement in case the amount of electrical storage of the apparatus in Embodiment 3 of this invention is lower than predetermined value. It is a flowchart of the electric power generation period extension process routine of the apparatus in Embodiment 3 of this invention. It is a control map which sets the electric power generation stop instantaneous rotation speed of the apparatus in Embodiment 3 of this invention. It is a block diagram of the control apparatus of the internal combustion engine by Embodiment 4 of this invention. It is a time chart which shows the operation | movement in case the amount of electrical storage of the apparatus in Embodiment 4 of this invention is lower than predetermined value. It is a flowchart of the motor arithmetic processing routine of the apparatus in Embodiment 4 of this invention. It is a flowchart of the torque generation timing calculation processing routine of the apparatus in Embodiment 4 of this invention. It is a flowchart of the field current correction arithmetic processing routine of the apparatus in Embodiment 4 of this invention. It is a control map which sets the target voltage of the apparatus in Embodiment 4 of this invention. It is a control map which sets the field current correction coefficient of the apparatus in Embodiment 4 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Internal combustion engine 2 Battery 3 Current sensor 4 Motor generator 5 Crank angle sensor 6, 54 Power storage monitoring means 7, 55 Torque generation timing setting means 8, 56 Torque generation amount setting means 9, 57 Torque generation absorption device control means 10, 59 Motor Generator control device 58 Field current correction means 100 Output shaft of internal combustion engine 300 Torque transmission means 400 Motor generator rotor shaft 500 Gear 11 Crank angle 12, 26, 45, 60 Internal combustion engine rotational speed 13, 27, 46, 61 hours Average rotational speed 14, 28, 47, 62 Basic torque generation timing 15, 30, 49, 63 Power generation permission flag 16, 22, 31, 50, 68 Phase current 17, 23, 32, 51, 69 Field current 18, 25 , 33, 52, 70 Internal combustion engine torque 19, 24, 34, 5 3, 71 Motor generator torque 20, 43 Power generation start angle 21, 44 Power generation end angle 29 Power generation period extension counter 48 Power generation extension flag 64 Reference battery voltage 65 Battery voltage 66 Target voltage 67 Field current correction coefficient

Claims (13)

  A rotating electrical machine connected to the output shaft of the internal combustion engine and storing the generated power in the power storage means; a drive region for applying torque to the output shaft of the previous rotating electrical machine; and a power generation region for generating power by being driven by the internal combustion engine A control apparatus for an internal combustion engine having a rotating electrical machine control means that operates by switching, wherein the rotational angle detection means detects a rotational angle of an output shaft of the internal combustion engine, and the operation of the rotating electrical machine is an operating state of the internal combustion engine A rotating electrical machine control means for controlling the power storage according to the power storage means, and a power storage monitoring means for monitoring the amount of power stored in the power storage means, wherein the rotating electrical machine control means has a rotational speed during idle operation of the internal combustion engine exceeding a predetermined value. A first operating state in which the rotating electrical machine is operated in the power generation region, and a rotation speed during idle operation of the internal combustion engine is equal to or less than the predetermined value and the storage amount detected by the storage monitoring means is A second operating state in which the rotating electrical machine is operated by switching between the drive region and the power generation region based on a predetermined timing corresponding to the rotation angle detected by the rotation angle detection means when exceeding a fixed value; When the rotational speed during idling of the internal combustion engine is equal to or less than the predetermined value and the power storage amount detected by the power storage monitoring means is equal to or less than the predetermined value, the rotating electrical machine is controlled based on a timing different from the predetermined timing. A control apparatus for an internal combustion engine, configured to switch to and operate between the drive region and the power generation region, and to be in a third operation state in which the switching timing can be changed.   2. The internal combustion engine according to claim 1, wherein a ratio of the power generation region to the drive region in the third operation state is increased more than the ratio in the second operation state. Rotating electrical machine control device.   The increase in the ratio of the power generation region to the drive region is that the end point of the section of the power generation region in the third operating state is greater than the end point of the section of the power generation region in the second operating state. 3. The control device for an internal combustion engine according to claim 2, wherein the control is performed by extending the control signal.   The control device for an internal combustion engine according to claim 3, wherein the extension of the end point of the section of the power generation region is set based on a predetermined count value of a counter that operates from the end point of the drive region.   The predetermined count value of the counter is set based on a map in which a power generation period is set using at least the power storage amount obtained by the power storage monitoring means and the average rotation speed of the internal combustion engine as parameters. The control device for an internal combustion engine according to claim 4.   The increase in the ratio of the power generation area to the drive area is performed by setting the power generation area based on a map in which the power generation start angle and the power generation end angle are set using at least the average rotation speed of the internal combustion engine as a parameter. The control apparatus for an internal combustion engine according to claim 2, wherein the control apparatus is an internal combustion engine.   An instantaneous rotational speed value calculating means for calculating an instantaneous rotational speed value of the internal combustion engine within a predetermined interval shorter than an ignition cycle of the internal combustion engine; and in the third operating state, the instantaneous rotational speed value calculating means. 2. The rotating electrical machine control device for an internal combustion engine according to claim 1, wherein power generation of the rotating electrical machine is stopped when the instantaneous rotational speed value calculated by the step becomes equal to or less than a predetermined instantaneous rotational speed value. The control device for an internal combustion engine according to claim 7, wherein the predetermined instantaneous rotation speed value is set based on at least the amount of power stored by the power storage monitoring unit.   The predetermined instantaneous rotational speed value is set such that a ratio of the power generation area to the drive area in the third operation state is larger than the ratio in the second operation state. The control apparatus for an internal combustion engine according to claim 7 or 8, characterized by the above.   The control device for an internal combustion engine according to any one of claims 2 to 6, or 9, wherein an increase in the ratio of the power generation region to the drive region is performed for each ignition cycle of the internal combustion engine.   A rotating electrical machine connected to the output shaft of the internal combustion engine and storing the generated power in the power storage means; a drive region for applying torque to the output shaft of the previous rotating electrical machine; and a power generation region for generating power by being driven by the internal combustion engine A control apparatus for an internal combustion engine having a rotating electrical machine control means that operates by switching, wherein the rotational angle detection means detects a rotational angle of an output shaft of the internal combustion engine, and the operation of the rotating electrical machine is an operating state of the internal combustion engine. A rotating electrical machine control means for controlling the power storage according to the power storage means, and a power storage monitoring means for monitoring the amount of power stored in the power storage means, wherein the rotating electrical machine control means has a rotational speed during idle operation of the internal combustion engine exceeding a predetermined value. A first operating state in which the rotating electrical machine is operated in the power generation region, and a rotation speed during idle operation of the internal combustion engine is equal to or less than the predetermined value and the storage amount detected by the storage monitoring means is A second operating state in which the rotating electrical machine is operated by switching between the drive region and the power generation region based on a predetermined timing corresponding to the rotation angle detected by the rotation angle detection means when exceeding a fixed value; When the rotational speed during idling of the internal combustion engine is equal to or less than the predetermined value and the power storage amount detected by the power storage monitoring means is equal to or less than the predetermined value, the target value of the generated voltage of the rotating electrical machine is set to the second operation. An internal combustion engine that is configured to be in a third operating state that is different from a target value of the generated voltage of the rotating electrical machine in a state and that allows the target value to be changed. Engine rotating electrical machine control device.   12. The control device for an internal combustion engine according to claim 11, wherein the target value of the generator is set based on a deviation between a storage amount of the power storage means detected by the power storage monitoring means and a predetermined value.   Field current correction means for correcting the field current of the rotating electrical machine is provided, and the field current of the rotating electrical machine is corrected based on the target value of the generated voltage in the third operating state. The control device for an internal combustion engine according to claim 11 or 12.

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