WO2018173981A1

WO2018173981A1 - Vehicular motor control device

Info

Publication number: WO2018173981A1
Application number: PCT/JP2018/010648
Authority: WO
Inventors: 知也真壁
Original assignee: 本田技研工業株式会社
Priority date: 2017-03-23
Filing date: 2018-03-16
Publication date: 2018-09-27
Also published as: JPWO2018173981A1; CN110446848B; JP6715387B2; CN110446848A

Abstract

Provided is a vehicular motor control device capable of driving an ACG motor starter using, as power sources, a battery and capacitors having different rated voltages from each other. A second rated voltage (V2) of the capacitors (E1, E2) is set to a larger value than a first rated voltage (V1) of the battery (3). Switching is enabled between a first charging means (7a) for charging the battery (3) and the capacitors (E1, E2) to the first rated voltage (V1) in a state in which the battery (3) and the capacitors (E1, E2) are connected in parallel and a second charging means (7b) for charging the capacitors (E1, E2) to the second rated voltage (V2). A charge pump circuit (9) is provided with a battery protection switch (9a) for switching the circuit such that the second rated voltage (V2) is not applied to the battery (3). Power is supplied to the ACG motor starter (8) by controlling the switch of the charge pump circuit (9) and connecting the battery (3) and the capacitors (E1, E2) in series.

Description

Vehicle motor control device

The present invention relates to a vehicle motor control device, and more particularly to a vehicle motor control device that controls an ACG starter motor that functions as a cell motor when an engine is started and also functions as a generator after the engine is started.

Conventionally, an ACG starter motor that functions as a motor that cranks a crankshaft driven by a current supplied from a battery when the engine is started and also functions as a synchronous generator after the engine is started is known.

Patent Document 1 includes a battery and a capacitor (capacitor) as a power source for supplying power to the ACG starter motor. When the engine is started, the battery and the capacitor are connected in parallel to supply power to the ACG starter motor. A motor control device is disclosed in which a battery and a capacitor are connected in series to supply power to an ACG starter motor when acceleration is requested after startup.

JP 2017-2893 A

However, in the technique of Patent Document 1, a capacitor having a rated voltage larger than the rated voltage (12 V) of the battery is used, and the voltage when the battery and the capacitor are connected in series is increased to drive the ACG starter motor. Was not considered.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems of the prior art and provide a vehicle motor control device that can drive an ACG starter motor using batteries and capacitors having different rated voltages as power sources.

In order to achieve the above object, the present invention provides an ACG starter motor (8) that functions as a motor or a generator by rotating in synchronization with the engine (E), and a controller that controls power generation by the ACG starter motor (8). (5) and a motor controller for a vehicle including a first power storage means (3) and a second power storage means (E1, E2) for storing the generated electric charge, wherein the ACG starter motor (8) has a three-phase It has a stator coil (35) connected to a full-wave rectifier (4), and from the first rated voltage (V1) that is the rated voltage of the first power storage means (3), the second power storage means (E1, E2) ) Of the second rated voltage (V2), which is the rated voltage, is set to a larger value, and the first power storage means (9) is connected to the charge pump circuit (9) including the second power storage means (E1, E2). 3) and all three phases A rectifier (4) is connected, and the control unit (5) is configured to connect the first power storage unit (3) and the second power storage unit (E1, E2) in parallel with each other. (3) and a first charging means (7a) for charging the second power storage means (E1, E2) to the first rated voltage (V1) and the second power storage means (E1, E2) The second charging means (7b) that charges the second rated voltage (V2) can be switched, and the second rated voltage (V2) is supplied to the charge pump circuit (9). A first power storage means protection switch (9a) for switching the circuit so as not to be applied to one power storage means (3) is provided, and the control unit (5) controls each switch included in the charge pump circuit (9). Controlled and charged at the first rated voltage (V1). The first power storage means (3) and the second power storage means (E1, E2) charged with the second rated voltage (V2) can be connected in series to supply power to the ACG starter motor (8). The first feature is that it is configured as follows.

Further, the second charging means (7b) changes the generated voltage of the ACG starter motor (8) from the first rated voltage (V1) to the second rated voltage (V2) during operation of the engine (E). The control section (5) applies the second charging means (7b) when the throttle operation element (47) for adjusting the output of the engine (E) is closed. 2 The power storage means (E1, E2) is charged to the second rated voltage (V2), and the control unit (5) responds to the opening operation of the throttle operation element (47), and the first power storage means (3 ) And the second power storage means (E1, E2) are connected in series to execute acceleration assist control for supplying electric power to the ACG starter motor (8).

Further, the second charging means (7b) changes the generated voltage of the ACG starter motor (8) from the first rated voltage (V1) to the second rated voltage (V2) during operation of the engine (E). The control section (5) switches the second charging means (7b) when a predetermined time elapses at a predetermined opening of the throttle operator (47) for adjusting the output of the engine (E). By applying, the second power storage means (E1, E2) is charged to the second rated voltage (V2), the control unit (5), in response to the opening operation of the throttle operator (47), A third feature is that acceleration assist control for supplying electric power to the ACG starter motor (8) by connecting the first power storage means (3) and the second power storage means (E1, E2) in series is performed.

The second charging unit (7b) controls the three-phase full-wave rectifier (4) during step-up chopper control while the engine (E) is stopped, thereby controlling the second power storage unit (E1, E2). The control unit (5) is a means for charging at the second rated voltage (V2), and the control unit (5) is configured to start the engine (E) when the first power storage means (3) and the second power storage means (E1, E2). ) Are connected in series and start assist control for supplying electric power to the ACG starter motor (8) is executed.

Further, the control unit (5) is configured so that, even when the second power storage means (E1, E2) is not boosted to the second rated voltage (V2), according to the opening operation of the throttle operator (47), A fifth feature is that start assist control is performed in which the first power storage means (3) and the second power storage means (E1, E2) are connected in series to supply power to the ACG starter motor (8). .

Further, the control unit (5) executes the idle stop control for stopping the engine (E) when a predetermined stop condition is satisfied and restarting the engine (E) when the predetermined restart condition is satisfied. The controller (5) connects the first power storage means (3) and the second power storage means (E1, E2) in series to the ACG starter motor (8) when restarting by the idle stop control. At the time of normal start that is executed by performing start assist control for supplying electric power and operating the starter switch by turning on the power of the vehicle, electric power is supplied from the first power storage means (3) to the ACG starter motor (8). There is a sixth feature in that it is configured to supply

In addition, the control unit (5) is responsive to the opening operation of the throttle operator (47) even when the second power storage means (E1, E2) is not boosted to the second rated voltage (V2). The seventh feature is that the acceleration assist control for supplying power to the ACG starter motor (8) by connecting the first power storage means (3) and the second power storage means (E1, E2) in series is executed. is there.

The eighth feature is that the charge pump circuit (9) is a two-stage charge pump circuit having two second power storage means (E1, E2).

Furthermore, the ninth feature is that the first power storage means (3) is a battery and the second power storage means (E1, E2) is a capacitor.

According to the first feature, an ACG starter motor (8) that functions as a motor or a generator by rotating synchronously with the engine (E), and a control unit (5) that controls power generation by the ACG starter motor (8). In the vehicle motor control device including the first power storage means (3) and the second power storage means (E1, E2) for storing the generated electric power, the ACG starter motor (8) includes a three-phase full-wave rectifier ( 4) having a stator coil (35) connected to the rated voltage of the second power storage means (E1, E2) from the first rated voltage (V1) which is the rated voltage of the first power storage means (3). The second rated voltage (V2) is set to a larger value, and the first power storage means (3) and the charge storage circuit (9) including the second power storage means (E1, E2) are connected to the charge pump circuit (9). Three-phase full-wave rectifier (4) The control unit (5) is configured to connect the first power storage unit (3) and the second power storage unit (E1, E2) in parallel with the first power storage unit (3) and the second power storage unit (E1, E2). First charging means (7a) for charging the second power storage means (E1, E2) to be the first rated voltage (V1), and the second power storage means (E1, E2) are connected to the second rated voltage ( V2) is configured to be switchable to the second charging means (7b) for charging, and the second rated voltage (V2) is supplied to the first power storage means (3) in the charge pump circuit (9). ) Is provided with a first power storage means protection switch (9a) for switching the circuit so that it is not applied to the control unit (5), the control unit (5) controls each switch included in the charge pump circuit (9), The first power storage charged at the first rated voltage (V1) The stage (3) and the second power storage means (E1, E2) charged at the second rated voltage (V2) are connected in series so that power can be supplied to the ACG starter motor (8). Therefore, while diverting a lead battery or an electrical component as the first power storage means provided in a normal vehicle, for example, the first power storage means and the charge pump circuit can be simply added by adding a second power storage means and a charge pump circuit. The ACG starter motor can be driven with a high voltage obtained by connecting the second power storage means in series. As a result, the startability of the engine is greatly improved, and strong acceleration assist can be performed while the vehicle is running. Further, by providing the first power storage means protection switch, even when the second power storage means is boosted to the second rated voltage, for example, the first power storage means of the first rated voltage that is a lead battery is affected. Can be prevented.

According to the second feature, the second charging means (7b) is configured to change the generated voltage of the ACG starter motor (8) from the first rated voltage (V1) to the first rated voltage (V1) during operation of the engine (E). 2 is a means for switching to the rated voltage (V2), and the controller (5) switches the second charging means (7b) when the throttle operator (47) for adjusting the output of the engine (E) is closed. By applying, the second power storage means (E1, E2) is charged to the second rated voltage (V2), the control unit (5), in response to the opening operation of the throttle operator (47), Since the first power storage means (3) and the second power storage means (E1, E2) are connected in series to execute the acceleration assist control for supplying power to the ACG starter motor (8), the first power storage means (3) and the second power storage means (E1, E2) are used. 2 Power storage means at the second rated voltage Can be conductive, it is possible to prevent an increase in the number of components and cost. By applying the second charging means using the closing operation of the throttle operator as a trigger, it becomes easier to decelerate by regenerative braking while charging the second power storage means, and when there is an acceleration request by opening the throttle device Can drive the ACG starter motor with a high voltage obtained by connecting the first power storage means and the second power storage means in series. As a result, it is possible to perform acceleration assist with high responsiveness during acceleration after the throttle is turned off, and the throttle response can be greatly increased.

According to the third feature, the second charging means (7b) changes the generated voltage of the ACG starter motor (8) from the first rated voltage (V1) to the first rated voltage (V1) during operation of the engine (E). 2 is a means for switching to the rated voltage (V2), and the controller (5) is configured such that when the throttle operating element (47) for adjusting the output of the engine (E) has a predetermined opening and a predetermined time has elapsed, By applying the charging means (7b), the second power storage means (E1, E2) is charged to the second rated voltage (V2), and the control section (5) opens the throttle operator (47). Depending on the operation, the first power storage means (3) and the second power storage means (E1, E2) are connected in series to execute acceleration assist control for supplying power to the ACG starter motor (8). Predetermined operation with constant opening By applying the second charging means triggered by the elapse of time, for example, the second power storage means can be charged at the second rated voltage during high-speed cruise traveling with a constant throttle opening, When there is an acceleration request due to an opening operation, the ACG starter motor is driven with a high voltage obtained by connecting the first power storage means and the second power storage means in series to obtain assistance during overtaking acceleration during high-speed cruise traveling. Can do.

According to a fourth feature, the second charging means (7b) performs step-up chopper control on the three-phase full-wave rectifier (4) while the engine (E) is stopped, whereby the second power storage means. (E1, E2) is a means for charging with the second rated voltage (V2), and the controller (5) is configured such that the first power storage means (3) and the second power are stored when the engine (E) is started. Since start assist control for supplying electric power to the ACG starter motor (8) is performed by connecting the power storage means (E1, E2) in series, the second power storage means is charged to the second rated voltage without using the boost converter. It is possible to prevent an increase in the number of parts and cost. In addition, the engine startability can be improved by driving the ACG starter motor with a high voltage obtained by connecting the first power storage means and the second power storage means in series.

According to the fifth feature, the control section (5) allows the throttle operator (47) to operate even when the second power storage means (E1, E2) is not boosted to the second rated voltage (V2). In response to the opening operation, the first power storage means (3) and the second power storage means (E1, E2) are connected in series to execute start assist control for supplying power to the ACG starter motor (8). Even if the second power storage means is not boosted to the second rated voltage, the start assist control can be executed with priority given to the engine start operation by the driver.

According to a sixth feature, the control unit (5) stops the engine (E) when a predetermined stop condition is satisfied, and restarts the engine (E) when a predetermined restart condition is satisfied. The control unit (5) connects the first power storage means (3) and the second power storage means (E1, E2) in series at the time of restart by the idle stop control to connect the ACG. At the time of normal start that is executed by turning on the vehicle and operating the starter switch while performing start assist control for supplying power to the starter motor (8), the ACG starter is operated from the first power storage means (3). Since it is configured to supply power to the motor (8), if the engine is repeatedly stopped and restarted due to traffic jams, etc., the motor (8) will be turned on when restarting from the idle stop state. When to easily feel the Muragu, thereby improving the throttle response by executing a start-up assisting to be connected in series to the first storage means and second storage means only when the restart.

According to the seventh feature, the control section (5) includes the throttle operator (47) even when the second power storage means (E1, E2) is not boosted to the second rated voltage (V2). In response to the opening operation, the first power storage means (3) and the second power storage means (E1, E2) are connected in series to execute acceleration assist control for supplying power to the ACG starter motor (8). Even if the second power storage means is not boosted to the second rated voltage, the acceleration assist control can be executed with priority given to the engine start operation by the driver.

According to an eighth feature, since the charge pump circuit (9) is a two-stage charge pump circuit having two second power storage means (E1, E2), for example, the rated voltage of the first power storage means is When the rated voltage of the second power storage means is 12 volts, the ACG starter motor can be driven with a high voltage of 48 volts in total. Thereby, favorable startability and acceleration response can be obtained.

According to a ninth feature, since the first power storage means (3) is a battery and the second power storage means (E1, E2) is a capacitor, a standard product or a general-purpose battery or capacitor is used. The ACG starter motor can be driven with a high voltage obtained by connecting them in series.

1 is a left side view of a motorcycle to which a vehicle engine control device according to an embodiment of the present invention is applied. It is a block diagram which shows the structure of the motor control apparatus of the vehicle which concerns on this embodiment, and its peripheral device. It is a circuit block diagram of a full wave rectifier and a charge pump circuit. It is operation | movement explanatory drawing in case a capacitor | condenser is charged 12 volts with the electric power of a battery in the time of a power supply ON and an engine stop. It is operation | movement explanatory drawing in case an engine is drive | operating and a battery and a capacitor are charged by 12 volts with the electric power generated by an ACG starter motor. FIG. 11 is an operation explanatory diagram of a state “1” in which the capacitor is boosted to 18 volts by boost chopper control while the power is on and the engine is stopped. FIG. 11 is an operation explanatory diagram of a state “2” in which the capacitor is boosted to 18 volts by boost chopper control while the power is on and the engine is stopped. It is operation | movement explanatory drawing when the engine is driving | running | working and the electric power generation voltage of an ACG starter motor is switched to 18 volts for acceleration assistance, and a capacitor is boosted to 18 volts. FIG. 5 is an operation explanatory diagram when the battery and two capacitors are connected in series and the ACG starter motor is driven with a total of 48 volts during engine startup or acceleration assist. It is operation | movement explanatory drawing in the state which the engine is driving | running | working and is waiting for charge of a capacitor after assist control.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a left side view of a motorcycle 1 to which a vehicle engine control apparatus according to an embodiment of the present invention is applied. The motorcycle 1 includes a front wheel WF supported by a steering handle 60 so as to be steerable, a rear wheel WR supported by a rear portion of a swing unit 70 that integrally constitutes an engine E and a transmission, a front wheel WF, and a rear wheel. This is a scooter type straddle-type vehicle having a seat 62 provided between the wheel WR and an occupant sitting over the seat 62. The crankshaft 2 of the engine E is rotated by rotating the crankshaft 2 by supplying electric power, and an ACG starter motor 8 that functions as a generator after the engine E is started is attached.

The motorcycle 1 includes a vehicle body frame 63, and a link mechanism 65 extends from the vehicle body frame 63 via a link pivot 64 as a shaft member to the rear of the vehicle. The link mechanism 65 causes the swing unit 70 to move relative to the vehicle body frame 63. And is supported so that it can swing. The steering handle 60 is fixed to the upper end portion of the steering stem 69, and a pair of left and right front forks 71 that rotatably support the front wheel WF are fixed to the lower end portion of the steering stem 69.

The swing unit 70 has a long shape in which the cylinder axis of the engine E is largely inclined toward the front side of the vehicle body and a transmission case of the transmission is disposed on the rear side of the crankshaft 2 on the vehicle body. A mechanical centrifugal clutch C is disposed on the vehicle body rear side of the transmission case. An engine speed sensor 45 is disposed in the vicinity of the ACG starter motor 8, and a vehicle speed sensor 46 is disposed in the vicinity of the axle of the rear wheel WR.

The vehicle body frame 63 includes a head pipe 85 that pivotally supports the steering stem 69 at the front end portion, a down frame 86 that extends from the head pipe 85 downward to the rear of the vehicle, and a pair of left and right lower arms that extend from the lower portion of the down frame 86 to the rear of the vehicle. A frame 87 and a seat frame 88 that extends from the rear end portion of the lower frame 87 upward to the rear of the vehicle and supports the seat 62 are included. A cushion unit 66 is interposed between the rear portion of the swing unit 70 that also functions as a swing arm and the seat frame 88. An air cleaner box 68 is provided on the upper surface of the swing unit 70.

A cross frame 91 oriented in the vehicle width direction is passed between the pair of left and right lower frames 87, and is directed in the vehicle width direction between the pair of left and right lower frames 87 in front of the cross frame 91 in the vehicle. The front cross frame 92 is passed, and the lower end of the down frame 86 is connected to the front surface of the front cross frame 92.

Outside the vehicle body frame 63, a front cover 73 covering the front of the vehicle body, a floor panel 74 attached so as to cover the steering stem 69 from the rear of the front cover 73, and left and right extending from the end of the front cover 73 to the rear of the vehicle body A pair of side covers 75, a tunnel member 76 passed between the left and right side covers 75 in front of the seat 62, a pair of left and right under covers 78 formed with a step floor 77 on which the driver puts his feet, and the seat 62 Left and right rear side covers 79 extending from the lower part of the vehicle to the rear of the vehicle body are disposed. A windshield 80 is attached to the upper end of the front cover 73. A front fender 81 is disposed above the front wheel WF, and a rear fender 83 is disposed above the rear wheel WR.

On the right side of the steering handle 60, there is disposed a throttle opening sensor 50 for detecting the opening of a throttle grip as a throttle operator operated by the driver. In front of the head pipe 85, an ECU 5 as a control unit is disposed. Below the seat 62, a battery 3 as first power storage means for supplying power to the ACG starter motor 8, and a first capacitor E1 and a second capacitor E2 as second power storage means are arranged. The first capacitor E1 and the second capacitor E2 are smaller and lighter than the battery 3 that is a general lead storage battery, and an increase in installation space is minimized.

The motorcycle 1 has an idle stop function of stopping the engine E when a predetermined stop condition is satisfied and restarting the engine E when the predetermined restart condition is satisfied. For example, the ECU 5 temporarily stops the engine E on the condition that the throttle opening is zero, a predetermined time has elapsed since the motorcycle 1 is stopped, and the driver is seated on the seat 62. If the opening operation of the throttle grip is performed during the temporary stop, the ACG starter motor 8 is driven to restart the engine E.

FIG. 2 is a block diagram showing the configuration of the vehicle motor control device and its peripheral devices according to this embodiment. The ECU 5 receives output signals from a throttle opening sensor 50, a vehicle speed sensor 46, and a Ne sensor 45 that detect the opening of the throttle operator 47. The ECU 5 includes a motor drive control unit 6 and a charge control unit 7. The motor drive control unit 6 includes a motor assist control unit 6a, and the charge control unit 7 includes a normal charge control unit 7a and a capacitor boost charge control unit 7b.

The ACG starter motor connected to the crankshaft (crankshaft) 2 of the engine E includes a stator coil 35 composed of U, V, and W phases, and the stator coil 35 is connected to the full-wave rectifier 4. A charge pump circuit 9 is connected to the full wave rectifier 4. The charge pump circuit 9 includes a first capacitor E1, a second capacitor E2, and a battery protection switch 9a as a first power storage means protection switch. The battery 3 is connected to the charge pump circuit 9, and the output signal of the battery remaining amount sensor 10 is input to the ECU 5.

In the present embodiment, the rated voltage of the battery 3 is set to the first rated voltage V1 = 12 volts, while the rated voltage of the first capacitor E1 and the second capacitor E2 is set to the second rated voltage V2 = 18 volts. After charging, the ACG starter motor 8 can be driven by the output voltages of the battery 3, the first capacitor E1, and the second capacitor E2.

The full wave rectifier 4 and the charge pump circuit 9 are controlled by the ECU 5. The normal charge control unit 7a of the charge control unit 7 functions as a first charging unit for charging the battery 3, the first capacitor E1, and the second capacitor E2 with 12 volts each. Further, the capacitor boost charge control unit 7b of the charge control unit 7 functions as a second charging unit for charging the first capacitor E1 and the second capacitor E2 with 18 volts. The charging control unit 7 can function by switching between the first charging means (7a) and the second charging means (7b) according to the situation.

The motor drive control unit 6 controls the full-wave rectifier 4 when the engine E is started, and can drive the ACG starter motor 8 with 12 volt supply power from the battery 3. In addition, the motor assist control unit 6a of the motor drive control unit 6 connects the battery 3 charged with 12 volts, the first capacitor E1 and the second capacitor E2 charged with 12 volts in series, resulting in a total of 36 volts. The ACG starter motor 8 can be driven by voltage. The motor assist controller 6a connects the battery 3 charged at 12 volts, the first capacitor E1 and the second capacitor E2 charged at 18 volts in series, and the ACG starter motor 8 at a voltage of 48 volts in total. Can be driven. Furthermore, the motor assist control unit 6a connects the battery 3, the first capacitor E1, and the second capacitor E2 in series even when the boosting charging of the first capacitor E1 and the second capacitor E2 is started but does not reach 18 volts. Thus, the ACG starter motor 8 can be driven with a voltage of 36 to 48 volts in total.

FIG. 3 is a circuit configuration diagram of the full-wave rectifier 4 and the charge pump circuit 9. Full-wave rectifier 4 includes

FETs

4 a, 4 b, 4 c, 4 d, 4 e, 4 f and smoothing capacitor 12 connected to the U, V, W phases of stator coil 35 of ACG starter motor 8, respectively.

The battery disconnecting relay 13 is connected to the positive terminal of the full-wave rectifier 4. The battery disconnection relay 13 is configured to be able to switch between a line A connected to the fuel injection and ignition system switch 15a via the fuse 14a and a line B constituting the plus side of the charge pump circuit 9. The line A is provided with a backflow prevention diode 10a, and a backflow prevention diode 10h is disposed on the upstream side of the connection portion of the line A to the line B. A switch 15b for an electrical load such as a lighting device is connected to the downstream side of the diode 10h via a fuse 14b. A line C connected to the negative terminal of the battery 3 is connected to the negative terminal of the full-wave rectifier 4.

The charge pump circuit 9 configured between the line B and the line C includes seven FETs (9a, 9b, 9c, 9d, 9e, 9f, 9g) as switching elements, and six diodes (10b, 10c, 10d, 10e, 10f, 10g), two capacitors (E1, E2), and two resistors (11), and the two capacitors E1, E2 are boosted to 18 volts respectively. It is configured to be able to. For the two capacitors E1 and E2, an electric double layer capacitor, a lithium ion capacitor, or the like that can flow a large current and has a long output time can be applied. Although a capacitor is applied in this embodiment, a capacitor or a lithium ion battery may be used, and various power storage devices can be applied.

The first FET 9a provided on the line B is a battery protection switch for switching so that the boosted and charged 18 volt power does not reach the battery 3, and a third diode 10b for preventing parallel connection is provided downstream of the first FET 9a. It has been.

The first capacitor E1 is provided on a line branched from the upstream side of the first FET 9a, and the second EFT 9b and the third FET 9c are arranged in parallel above and below the first capacitor E1. On the downstream side of the third FET 9c, a second diode 10c for preventing a reverse flow of the charging current to the ACG starter motor 8 is disposed.

Between the first capacitor E1 and the line C, a fourth FET 9d, a first resistor 11a for preventing a large current from flowing, and a seventh diode 10d for preventing the discharge of the first capacitor E1 are provided. A second capacitor E2 is disposed on the downstream side of the second EFT 9b and the third FET 9c, and a fifth EFT 9e and a sixth FET 9f are disposed in parallel above and below the second capacitor E2. Between the second capacitor E2 and the line C, a seventh FET 9g, a second resistor 11b for preventing a large current from flowing, and a sixth diode 10g for preventing the discharge of the second capacitor E2 are provided.

A fourth diode 10e is disposed downstream of the fifth EFT 9e so as to prevent the boosted 18 volt power from being applied to electrical equipment such as a lighting device, and an ACG starter motor downstream of the sixth FET 9f. A fifth diode 10f that prevents the backflow of the generated current 8 is disposed. The downstream side of the fourth diode 10e and the fifth diode 10f is connected to the line B on the downstream side of the third diode 10b.

In this embodiment, a two-stage charge pump circuit having two capacitors is used. However, the number of stages can be increased to three or four according to the vehicle type and application of the vehicle.

The charge control unit 7 shown in FIG. 2 rectifies the AC generated power of the ACG starter motor 8 by the full-wave rectifier 4 after the engine E is started, and retards energization or advancement to the stator coil 35 during power generation by driving the engine. Each of the FETs 4a to 4f is switched to increase or decrease the power generation amount so that the corner energization is performed. Further, the charging control unit 7 can switch the generated voltage of the ACG starter motor 8 during engine operation to 12 volts or 18 volts.

The normal charging control unit 7a charges the battery 3 and the capacitors E1, E2 with 12 volts (first charging means) with the 12 volt generated power of the ACG starter motor 8. Further, the capacitor boosting charge control unit 7b boosts and charges the capacitors E1, E2 to 18 volts (second charging means) with the 18 volt generated power of the ACG starter motor 8. Furthermore, the capacitor boost charge control unit 7b can boost the capacitors E1 and E2 to 18 volts (second charge means) by controlling the full-wave rectifier 4 while the engine is stopped.

In other words, the boosting charging of the capacitors E1 and E2 to 18 volts is performed by changing the generated voltage of the ACG starter motor 8 when the engine E is in operation, and the full-wave rectifier 4 is powered by the battery 3 when the engine E is stopped. This is performed by boost chopper control. Hereinafter, the relationship between the running state of the motorcycle 1 and the operation of the circuit will be described with reference to FIGS.

FIG. 4 is an operation explanatory diagram when the capacitor is charged by 12 volts with the power of the battery 3 while the power is on and the engine is stopped. The power-on and the engine being stopped is a state where the ignition switch is switched on from the power-off or the engine E is temporarily stopped by idle stop control.

At this time, the normal charge control unit 7a can charge the first capacitor E1 and the second capacitor E2 by 12 volts with the electric power of the battery 3. More specifically, the first FET E1 and the second capacitor E2 are connected in parallel by turning on the second FET 9b and the fifth FET 9e, and turning off the third FET 9c and the sixth FET 9f, and further turning on the fourth FET 9d and the seventh FET 9g. Thus, the power of the battery 3 is supplied to the first capacitor E1 and the second capacitor E2.

FIG. 5 is an operation explanatory diagram when the engine is in operation and the battery and the capacitor are charged by 12 volts with the power generated by the ACG starter motor 8 (first charging means). As described above, the normal charge control unit 7a can set the power generation voltage of the ACG starter motor 8 during engine operation to 12 volts. Along with this, the first FET 9 a as a battery protection switch is turned on to supply the generated power of the ACG starter motor 8 to the battery 3. Further, the second FET 9b and the fifth FET 9e are turned on, and the third FET 9c and the sixth FET 9f are turned off to connect the first capacitor E1 and the second capacitor E2 in parallel, and further, the fourth FET 9d and the seventh FET 9g are turned on. Thus, the electric power generated by the ACG starter motor 8 is supplied to the first capacitor E1 and the second capacitor E2.

FIG. 6 is an operation explanatory diagram of a state “1” in which the capacitor is boosted to 18 volts by boost chopper control while the power is on and the engine is stopped. FIG. 7 is an operation explanatory diagram of a state “2” in which the capacitor is boosted to 18 volts by boost chopper control while the power is on and the engine is stopped. Specifically, when the power is on and the engine is stopped, the first capacitor E1 and the second capacitor E2 are boosted to 18 volts by chopper control that alternately switches between the states shown in FIGS. 6 and 7 (second charging means). .

6 and 7, the first FET 9a, which is a battery protection switch, is turned off, the second FET 9b and the fifth FET 9e are turned on, and the third FET 9c and the sixth FET 9f are turned off to turn off the first capacitor E1 and the second capacitor. E2 is connected in parallel, and the fourth FET 9d and the seventh FET 9g are turned on, so that the first capacitor E1 and the second capacitor E2 are ready for charging.

In FIG. 6, the

FETs

4b, 4c, 4e of the full-wave rectifier 4 are on, and the V phase and U phase of the stator coil 35 are positive. Here, as shown in FIG. 7, when all the FETs of the full-wave rectifier 4 are switched off, the V phase and the U phase turn negative, and a large positive electromotive force is generated in the W phase. By repeating the switching of the full-wave rectifier 4, the first capacitor E1 and the second capacitor E2 are boosted and charged to 18 volts.

The above-described boost charging of the first capacitor E1 and the second capacitor E2 by the boost chopper control can be set to be executed when the engine is temporarily stopped by the idle stop control.

FIG. 8 is an operation explanatory diagram in the case where the engine is in operation and the power generation voltage of the ACG starter motor is switched to 18 volts and the capacitor is boosted to 18 volts for acceleration assistance (second charging means). As described above, the charging control unit 7 can switch the generated voltage of the ACG starter motor 8 during engine operation to 18 volts.

The first FET 9a that is a battery protection switch is turned off, the second FET 9b and the fifth FET 9e are turned on, and the third FET 9c and the sixth FET 9f are turned off to connect the first capacitor E1 and the second capacitor E2 in parallel. By turning on the fourth FET 9d and the seventh FET 9g, the first capacitor E1 and the second capacitor E2 are boosted and charged to 18 volts. At this time, since the first FET 9a is turned off, it is possible to prevent the generated power of 18 volts from being supplied to the battery 3.

In the present embodiment, the trigger for switching from 12 volt power generation to 18 volt power generation during traveling is that the throttle opening has decreased. As a result, charging for acceleration assistance during re-acceleration can be executed smoothly, and the braking force by regenerative braking when the throttle is closed is increased, so that a clear running feeling can be obtained only by operating the throttle. It becomes. Note that the trigger for switching from 12 volt power generation to 18 volt power generation during traveling may be set when a constant throttle opening is maintained for a predetermined time. According to this setting, acceleration assistance by the ACG starter motor can be obtained at the time of overtaking acceleration from high-speed cruise traveling. Moreover, it is good also as a trigger that the throttle opening was made into zero or it was made into below a predetermined opening.

Note that the time until the first capacitor E1 and the second capacitor E2 are fully charged by the 18-volt power generation of the ACG starter motor 8 is arbitrarily set according to the capacitor capacity and the capacity at the start of charging.

FIG. 9 is an operation explanatory diagram when the ACG starter motor 8 is driven with a total of 48 volts by connecting a battery and two capacitors in series when the engine is started or during acceleration assist. As described above, the motor drive control unit 6 can switch the FETs 4a to 4f to drive the ACG starter motor 8 as a synchronous motor with the electric power of the battery 3 when the engine is started. Further, the motor assist control unit 6a connects the battery 3, the first capacitor E1, and the second capacitor E2 in series when acceleration assist is required during restart from the temporary stop by the idle stop control and during traveling. The ACG starter motor 8 can be driven with a total voltage of 48 volts.

At this time, the charge pump circuit 9 turns off the first FET 9a, which is a battery protection switch, while turning off the second FET 9b and the fifth FET 9e, and turning on the third FET 9c and the sixth FET 9f, thereby turning on the battery 3, A first capacitor E1 and a second capacitor E2 are connected in series. The fourth FET 9d and the seventh FET 9g connected to the C line are turned off.

In the full-wave rectifier 4, the

FETs

4b, 4c and 4e are turned on, and the ACG starter motor 8 is driven with a total voltage of 48 volts. The time during which power can be supplied from the first capacitor E1 and the second capacitor E2 depends on the capacity of the capacitor and various conditions, but may be set arbitrarily. Acceleration such as acceleration at the corner exit and overtaking on the highway Set on demand.

As described above, the first capacitor E1 and the second capacitor E2 are always charged at 12 volts during running, and the boosting charge to 18 volts is executed with the throttle-off as a trigger, but to 18 volts. If the throttle operation is performed before the voltage boosting is completed, acceleration assistance by series connection can be performed with the voltage at that time. Similarly, acceleration assist may be performed with a voltage of 36 volts in total, for example, triggered by the rate of change of the throttle opening exceeding a predetermined value without going through step-up charging to 18 volts. The trigger for executing the acceleration assist may be a case where the throttle opening exceeds a predetermined threshold.

FIG. 10 is an operation explanatory diagram in a state where the engine is in operation and waiting for charging of the capacitor after the assist control. Immediately after the assist control at the time of engine restart or the acceleration assist during running, the engine E is in operation, and the 12-volt power generation of the ACG starter motor 8 starts the 12-volt charging of the first capacitor E1 and the second capacitor E2 promptly. Is done. Further, the second FET 9b and the fifth FET 9e are turned on, and the third FET 9c and the sixth FET 9f are turned off to connect the first capacitor E1 and the second capacitor E2 in parallel, and further, the fourth FET 9d and the seventh FET 9g are turned on. Thus, the electric power generated by the ACG starter motor 8 is supplied to the first capacitor E1 and the second capacitor E2. At this time, the charging of the first capacitor E1 and the second capacitor E2 is prioritized and the first FET 9a as the battery protection switch is turned off. Electric power is supplied from the battery 3 to an electric load such as a fuel injection and an ignition system. When the first capacitor E1 and the second capacitor E2 are fully charged, the first FET 9a is switched on to shift to 12 volt charging shown in FIG.

As described above, the vehicle motor control apparatus according to the present embodiment includes the battery 3 with the rated voltage of 12 volts, and the first capacitor E1 and the second capacitor E2 with the rated voltage of 18 volts greater than 12 volts. During normal driving, the ACG starter motor 8 is charged with 12 volts with the electric power generated by the ACG starter motor 8, and the ACG starter motor 8 is switched to 18 volt power generation using the throttle-off as a trigger to set the first capacitor E1 and the second capacitor E2 to 18 volts. The battery 3, the first capacitor E1, and the second capacitor E2 are connected in series according to the throttle operation, and a total acceleration assist of 48 volts can be provided. When the engine is stopped by the idle stop control, the first capacitor E1 and the second capacitor E2 are boosted to 18 volts by the boost chopper control of the full-wave rectifier 4, and the first capacitor E1 and the second capacitor are restarted at the time of restart. E2 can be connected in series to provide a total start assist of 48 volts. According to the present invention having such an effect, the existing system can be improved as follows.

First, in order to make it easy to start the engine, when the engine is temporarily stopped by a rewinding control in which the crankshaft is reversely rotated until the compression top dead center by an ACG starter motor according to a starter switch operation, or by an idle stop control. In addition, swing back control is known in which a crankshaft is reversely rotated to the point before compression top dead center by an ACG starter motor. On the other hand, if the above-described assist control by connecting the battery and the capacitor in series is applied, the startability of the engine is greatly improved, so that the rewind control and the swingback control can be eliminated. Thereby, it is possible to compress the time lag at the time of start and restart and to simplify the control.

If the first capacitor E1 and the second capacitor E2 are connected in series when starting the engine and start assist is performed, the ACG starter motor can be reduced in size within a range where sufficient power generation capacity can be secured, thereby reducing the weight of the vehicle body. Can be planned.

Furthermore, when a centrifugal clutch is applied to the start clutch and the engine is subjected to idle stop control, if the engine is temporarily stopped and restarted due to traffic jams or the like, the centrifugal clutch is connected at the time of restart from the idle stop state. It is easy to feel the time lag until the vehicle starts, so in the case of waiting for a signal after normal driving that has been increased to a certain speed or more, the engine is stopped in a short time, but it is congested driving that repeats driving at low speed and stopping Then, the structure which extended the time until engine stop is known. On the other hand, if the above-described assist control based on the series connection of the battery and the capacitor is applied, the time until the centrifugal clutch is connected can be shortened. It becomes possible to reduce.

The shape and structure of the battery and the capacitor, the rated voltage and capacity, the configuration of the charge pump circuit, the number of capacitors, the number and structure of the FETs are not limited to the above embodiment, and various changes can be made. For example, the boosting charging of the capacitor by the boosting chopper control may be executed with the ignition switch turned on as a trigger, and the battery and the capacitor are connected in series according to the operation of the starter switch to drive the ACG starter motor. The vehicle motor control device according to the present invention is not limited to a motorcycle, and can be applied to various vehicles such as a tricycle and a four-wheel vehicle.

DESCRIPTION OF SYMBOLS 1 ... Motorcycle (vehicle), 2 ... Crankshaft, 3 ... Battery (1st electrical storage means), 4 ... Full wave rectifier, 5 ... ECU (control part), 6 ... Motor drive control part, 7 ... Charge control part, 8 ... ACG starter motor, 35 ... stator coil, 9 ... charge pump circuit, 9a ... battery protection switch (first power storage means protection switch), 9b-9g ... FET, 50 ... throttle opening sensor, E1 ... first capacitor ( (Second power storage means), E2 ... second capacitor (second power storage means), V1 ... first rated voltage, V2 ... second rated voltage

Claims

An ACG starter motor (8) that functions as a motor or a generator that rotates in synchronization with the engine (E), a control unit (5) that controls power generation by the ACG starter motor (8), and accumulates the generated charge In the vehicle motor control device including the first power storage means (3) and the second power storage means (E1, E2),
The ACG starter motor (8) has a stator coil (35) connected to a three-phase full-wave rectifier (4);
The second rated voltage (V2) that is the rated voltage of the second power storage means (E1, E2) is larger than the first rated voltage (V1) that is the rated voltage of the first power storage means (3). Is set,
The charge storage circuit (9) including the second power storage means (E1, E2) is connected to the first power storage means (3) and the three-phase full-wave rectifier (4),
The control unit (5) includes the first power storage unit (3) and the second power storage unit (3) in a state where the first power storage unit (3) and the second power storage unit (E1, E2) are connected in parallel. The first charging means (7a) for charging E1, E2) to be the first rated voltage (V1) and the second power storage means (E1, E2) to be the second rated voltage (V2). The second charging means (7b) for charging the battery is switchable,
The charge pump circuit (9) is provided with a first power storage means protection switch (9a) for switching the circuit so that the second rated voltage (V2) is not applied to the first power storage means (3),
The control unit (5) controls each switch included in the charge pump circuit (9) to charge the first power storage means (3) and the second rated voltage charged with the first rated voltage (V1). Motor control of a vehicle characterized in that the second power storage means (E1, E2) charged with voltage (V2) are connected in series so that electric power can be supplied to the ACG starter motor (8). apparatus.
The second charging means (7b) switches the generated voltage of the ACG starter motor (8) from the first rated voltage (V1) to the second rated voltage (V2) during operation of the engine (E). Means,
The controller (5) applies the second charging means (7b) when the throttle operator (47) for adjusting the output of the engine (E) is closed to apply the second power storage means (E1, E1). E2) is charged to the second rated voltage (V2),
The control section (5) connects the first power storage means (3) and the second power storage means (E1, E2) in series in response to an opening operation of the throttle operator (47), thereby the ACG starter motor. 2. The vehicle motor control device according to claim 1, wherein acceleration assist control for supplying electric power to (8) is executed.
The second charging means (7b) switches the generated voltage of the ACG starter motor (8) from the first rated voltage (V1) to the second rated voltage (V2) during operation of the engine (E). Means,
The controller (5) applies the second charging means (7b) when the throttle operator (47) for adjusting the output of the engine (E) has a predetermined opening and a predetermined time has elapsed, thereby applying the second charging means (7b). 2 Charge the power storage means (E1, E2) to the second rated voltage (V2),
The control section (5) connects the first power storage means (3) and the second power storage means (E1, E2) in series in response to an opening operation of the throttle operator (47), thereby the ACG starter motor. 2. The vehicle motor control device according to claim 1, wherein acceleration assist control for supplying electric power to (8) is executed.
The second charging means (7b) performs step-up chopper control of the three-phase full-wave rectifier (4) while the engine (E) is stopped, so that the second power storage means (E1, E2) is 2 means for charging at the rated voltage (V2),
When the engine (E) is started, the controller (5) connects the first power storage means (3) and the second power storage means (E1, E2) in series to supply power to the ACG starter motor (8). The vehicle motor control device according to claim 1, wherein start assist control for supplying the vehicle is executed.
The controller (5) is configured to control the first power storage means (E1, E2) according to the opening operation of the throttle operator (47) even when the second power storage means (E1, E2) is not boosted to the second rated voltage (V2). The start assist control for supplying power to the ACG starter motor (8) by connecting one power storage means (3) and the second power storage means (E1, E2) in series is executed. Vehicle motor control device.
The control unit (5) executes the idle stop control for stopping the engine (E) when a predetermined stop condition is satisfied, and restarting the engine (E) when a predetermined restart condition is satisfied,
The control section (5) connects the first power storage means (3) and the second power storage means (E1, E2) in series when restarting by the idle stop control, and supplies power to the ACG starter motor (8). The start assist control to be supplied is executed, and power is supplied from the first power storage means (3) to the ACG starter motor (8) at the time of a normal start that is executed by turning on the vehicle power and operating the starter switch. The vehicle motor control device according to claim 4 or 5, wherein the motor control device for a vehicle is configured as described above.
Even when the second power storage means (E1, E2) is not boosted to the second rated voltage (V2), the control unit (5) is configured to perform the operation according to the opening operation of the throttle operator (47). The acceleration assist control for supplying power to the ACG starter motor (8) by connecting the first power storage means (3) and the second power storage means (E1, E2) in series is executed. 4. A motor control device for a vehicle according to 3.
The vehicle motor control according to any one of claims 1 to 7, wherein the charge pump circuit (9) is a two-stage charge pump circuit having two of the second power storage means (E1, E2). apparatus.
The first power storage means (3) is a battery;
9. The vehicle motor control device according to claim 1, wherein the second power storage means (E1, E2) is a capacitor.