JP4983385B2 - Control device for vehicle equipped with power generator - Google Patents

Description

  The present invention relates to a control device for an engine-driven vehicle equipped with a power generator that supplies electric power to an external load.

  As shown in Patent Document 1, in an engine-driven vehicle used for recreation or the like, a power generator that outputs AC power having a commercial frequency using a power generator driven by a vehicle driving engine as a power source is provided. Power is supplied from this power generator to an external load such as various electric tools and household electric appliances while the vehicle is mounted and stopped.

  A vehicle-mounted power generator that supplies commercial AC power to an external load converts a power generating coil for driving an external load provided in a generator driven by an engine, and converts the AC output into an AC output for driving an external load. And a power conversion unit. The power conversion unit controls the inverter so as to generate a commercial frequency AC output from the inverter, a converter that converts the AC output of the power generation coil into a DC output, an inverter that converts the DC output of the converter into an AC output of the commercial frequency, and And inverter control means.

  In a vehicle driven by an engine, a magnet driven by the engine in order to supply electric power to various on-vehicle electrical component loads such as a battery, an ignition device that ignites the engine, and a fuel injection device that supplies fuel to the engine A type AC generator is installed. Therefore, an in-vehicle power generator for driving an external load is provided by providing a power generation coil for driving an external load in the magnet type AC generator and an inverter for converting the output into a commercial AC output for driving the external load. It can be easily configured.

  When power is supplied from this type of power generator to an external load, for safety, the vehicle starts when the engine is operated at the rotational speed necessary to obtain the required output from the generator coil in the generator. It is necessary to keep from doing. Therefore, in this type of device, the operation of the power generation device is permitted only when it is confirmed that the vehicle is not likely to start (there is no possibility that power is transmitted from the engine to the drive wheels). I have to.

In the power generation device disclosed in Patent Document 1, a power cut-off position (neutral position or parking position) where the gear position of the power transmission device that transmits power from the engine to the drive wheels of the vehicle interrupts transmission of power to the drive wheels. When the control mode of the engine and the inverter is switched to the power generation mode by the mode change switch in the state of (position), the operation of the engine is permitted. In the power generation mode, the engine is controlled so that the rotation speed of the engine is maintained at a speed commensurate with the size of the external load so that the AC generator rotates at the rotation speed necessary to supply the required power to the external load. Is done.
JP 2006-141145 A

  As shown in Patent Literature 1, when the engine control mode is switched to the vehicle travel mode or the power generation mode depending on the state of the mode changeover switch and the state of the power transmission device. If the gear position of the power transmission device is in the neutral position or the parking position, the power generation device can be easily started by simply selecting the power generation mode with the mode changeover switch, so the following (a) and (b) It became clear that such a problem occurred.

(A) When the vehicle is stopped, an external load that is ready to operate as soon as power is supplied is connected to the power generator, and the engine is operated with the gear position of the power transmission device in the neutral position or the parking position. When the mode changeover switch is switched to the power generation mode side after starting, the external load may operate suddenly against the user's will, which may surprise the user. For example, if a tool such as an electric drill is connected between the output terminals of the generator set with the power switch on, the tool will suddenly move, which will surprise the user of the tool. This is not preferable.

(B) When operating the power generator and using an external load such as a power tool, a third party mistakenly sets the gear position of the engine power transmission device to a position other than the neutral position and the parking position (power transmission position). ), The vehicle suddenly starts running and the external load is dragged by the vehicle, which may surprise the user of the external load or damage the external load.

  It is an object of the present invention to set the gear position of the power transmission device to a neutral position while the external load is operating suddenly against the user's intention or the vehicle is stopped and the external load is driven by the output of the power generator. It is an object of the present invention to provide a power generator-equipped vehicle control device that eliminates the possibility that the vehicle starts traveling and drags or damages an external load when switched to a position other than the position and the parking position.

  The present invention includes an AC generator driven by a vehicle driving engine, a converter that converts the output of the AC generator into a DC output, and an inverter that converts the DC output into an AC output of a commercial frequency. The present invention is applied to a control device that controls an engine and a power generation device of a vehicle equipped with a power generation device that supplies power to a load.

  In the present invention, the gear position of the side brake sensor that detects the state of the side brake of the vehicle and the power transmission device that transmits the power from the engine to the drive wheels of the vehicle is the position at which the power is transmitted to the drive wheels. A gear position sensor that detects whether the power transmission position is at a power cutoff position, which is a position at which power transmission is interrupted, a mode changeover switch that switches a control mode between a power generation mode and a traveling mode, and at least the gear position is a power Power generation permission condition determination means for determining whether or not the power generation permission condition is satisfied by using the power generation permission condition that the shutoff position is detected and the control mode is switched to the power generation mode, and power generation permission condition determination Means to convert the commercial frequency from the inverter when it is determined that the power generation permission condition is satisfied. Inverter control means for controlling the inverter to generate an output and stop the operation of the inverter when the power generation permission condition is not satisfied, and to adapt to the vehicle traveling when the control mode is switched to the traveling mode Rotation suitable for supplying the required electric power from the inverter to the external load when the engine speed is controlled, the gear position is detected to be in the power shut-off position, and the control mode is switched to the power generation mode The engine speed is controlled to rotate the alternator at a speed, and the engine is controlled to stop when it is detected that the gear position is in the power transmission position while the inverter is operating. Engine control means.

  The inverter control means switches the control mode to the power generation mode in a state where the power generation permission condition determination means determines that the power generation permission condition is satisfied, and then once switches to the travel mode and then enters the power generation mode again. The inverter is configured to operate only when switched.

  As described above, after the control mode is switched to the power generation mode in a state where the power generation permission condition determination unit determines that the power generation permission condition is satisfied, the mode is once switched to the travel mode and then switched to the power generation mode again. If the inverter is operated only at times, the generator will not start even if the operator switches the control mode to the power generation mode by operating the mode switch after setting the gear position to the neutral position or the parking position. Therefore, it is possible to call the operator's attention about the safety confirmation before the start, and to prompt the user to reconfirm the external load state (whether the power switch is turned on, etc.).

  In the present invention, as described above, after calling the operator's attention and prompting to confirm safety, the mode changeover switch is once switched to the traveling mode side and then switched again to the power generation mode side. Since power generation is started, when the power generation device is activated by the operator's carelessness, it is possible to reduce a possibility that an abnormal situation such as a sudden movement of the load occurs against the operator's will.

  Also, with the above configuration, since the inverter operates and supplies power to the external load only when the power generation permission condition is satisfied, the generation output is prevented from being generated when the power generation permission condition is not satisfied. be able to.

  Moreover, if comprised as mentioned above, since the engine can be stopped when the gear position is switched to the power transmission position and the power generation permission condition is not satisfied, the power generator is operated and an external load is used. Sometimes, when a third person accidentally switches the gear position of the engine power transmission device to a position other than the neutral position or parking position, the vehicle suddenly starts running and the external load is dragged by the vehicle or is damaged. Can be prevented.

  In a preferred aspect of the present invention, a side brake sensor for detecting the state of the side brake of the vehicle is further provided, and the power generation permission condition determining means detects that the gear position is in the power cutoff position and the control mode is In addition to being switched to the power generation mode, the fact that the side brake is being applied by the side brake sensor is also used as a power generation permission condition to determine whether or not the power generation permission condition is satisfied. Composed.

  When configured as described above, the engine is stopped when the power generation permission condition is not satisfied because the side brake is removed while the power generation device is operating with the control mode switched to the power generation mode. Therefore, it is possible to prevent the operation of the power generator from being continued in an unstable state where the side brake is removed.

  In a preferred aspect of the present invention, overcurrent detection means for detecting whether or not the output current of the inverter exceeds the limit value is further provided, and the power generation permission condition determination means detects that the gear position is at the power shut-off position. In addition to the fact that the control mode is switched to the power generation mode, the fact that the overcurrent detection means has not detected that the output current of the inverter exceeds the limit value is also used as the power generation permission condition. It is comprised so that the presence or absence of establishment of permission conditions may be determined.

  If the power generation permission condition judging means is configured as described above, when an external load exceeding the rating of the power generation device is connected, or when a ground fault or short circuit accident occurs on the external load side, the semiconductor of the inverter It is possible to prevent the semiconductor switch from being destroyed due to an excessive current flowing through the switch.

  In a preferred aspect of the present invention, the engine control means is configured to stop the engine even when the rotational speed of the engine exceeds a limit value in the power generation mode with the inverter operating.

  If the engine control means is configured as described above, when electric power is supplied from the inverter to the external load, the engine rotation speed exceeds the limit value in the power generation mode, and an overvoltage is applied to the load. Therefore, it is possible to prevent the load from being destroyed by an overvoltage.

  As described above, according to the present invention, after the control mode is switched to the power generation mode by the mode switch, the power generation permission condition is established only when the mode is once switched to the travel mode and then switched to the power generation mode again. By calling the operator's attention at the start of power generation and urging them to confirm safety, the mode changeover switch is once switched to the travel mode side and then switched to the power generation mode side again. Since the power generation is started, the power generator starts up with the external load power switch turned on due to the operator's carelessness, and when the power generator starts up, the load suddenly goes against the operator's will. The possibility that an abnormal situation such as movement will occur can be reduced.

  Further, according to the present invention, the engine is stopped when it is detected that the gear position is in the power transmission position while the inverter is operating. Therefore, the power generator is operated to drive the external load. When a third party accidentally switches the gear position of the engine power transmission device to a position other than the neutral position and parking position, the vehicle suddenly starts running and the external load is dragged by the vehicle. , Can prevent damage.

  Furthermore, according to the invention described in claim 2, when the power generation device is operated with the control mode switched to the power generation mode, the engine is operated when the power generation permission condition is not satisfied because the side brake is removed. Therefore, it is possible to prevent the operation of the power generator from being continued in an unstable state where the side brake is removed.

  According to the invention described in claim 3, since it is possible to prevent the power generator from being operated in a state where the output of the inverter becomes excessive, when an external load exceeding the rating of the power generator is connected In addition, when a ground fault or short circuit accident occurs on the external load side, it is possible to prevent the semiconductor switch from being destroyed due to an excessive current flowing through the semiconductor switch of the inverter.

  Furthermore, according to the invention described in claim 4, the engine control means is configured to stop the engine when the rotational speed of the engine exceeds the limit value in the power generation mode with the inverter operated. Therefore, when power is being supplied from the inverter to the external load, the engine rotation speed exceeds the limit value in the power generation mode, and it is possible to prevent operation with an overvoltage applied to the load. The load can be prevented from being destroyed by overvoltage.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing a configuration example of a system including an engine and a generator and a control device of the present invention for controlling them. In the figure, reference numeral 1 denotes a vehicle driving engine mounted on the vehicle for driving the driving wheels of the vehicle, 2 a fuel supply device for supplying fuel to the intake pipe 3 of the engine 1, and 4 a throttle provided in the intake pipe of the engine. Throttle operating means for operating the valve 5, 6 is an ignition device for igniting the engine 1.

  The fuel supply device 2 used in the present embodiment is composed of a fuel injection device. When an injection command signal Sj is given from an engine control means 18 to be described later, the fuel supply device 2 is downstream of the throttle valve 5 in the intake pipe 3. Inject fuel into the space. The fuel injection amount is managed by the signal width of the injection command signal Sj.

  The throttle operating means 4 is composed of an electric actuator, and operates the throttle valve 5 according to a command given from the engine control means described later to adjust its opening.

  Reference numeral 7 denotes an alternator driven by the crankshaft of the engine 1. In this embodiment, the alternator 7 is a magnet type alternator. The magnet type AC generator includes a magnet rotor attached to an engine crankshaft and a stator fixed to an engine case or the like. The magnet rotor includes, for example, a cup-shaped rotor yoke that also serves as a flywheel, and a permanent magnet fixed to the inner periphery of the peripheral wall portion of the rotor yoke, and a boss provided at the center of the rotor yoke serves as an engine crankshaft. It is fitted and attached to the engine.

  A stator of a magnet type AC generator is composed of an armature core having a salient pole portion formed at the tip of a magnetic pole portion opposed to a magnetic pole of a magnet rotor via a gap, and wound around the salient pole portion of the iron core. Armature coil. In the present embodiment, a power generation coil for driving electric components to supply electric power to an electric component such as a fuel supply device 2, an ignition device 6, a battery (not shown) on an armature core of a magnet type AC generator, and an external load A power generation coil for driving an external load for supplying electric power is wound.

  The ignition device 6 includes a current interruption type or capacitor discharge type ignition circuit, and when an ignition signal Si is given from an engine control means to be described later at an ignition timing which is a timing at which each cylinder of the engine is ignited. A high voltage for ignition is generated, and this high voltage for ignition is applied to a spark plug provided in each cylinder of the engine.

  A power transmission device having a gear reduction mechanism and a clutch mechanism such as a centrifugal clutch mechanism is provided between the engine 1 and a driving wheel of a vehicle (not shown), and a gear is used to detect the gear position of the power transmission mechanism. A position sensor 8 is provided. The gear position sensor 8 generates a signal that takes different states depending on whether the gear position is in the power cutoff position or the power transmission position. As the gear position sensor 8, for example, a switch provided so as to take different states when the gear position is at the power cutoff position and when at the power transmission position can be used. Here, the “power cut-off position” is a neutral position and a parking position, and the “power transmission position” is a position other than the neutral position and the parking position.

  Further, a side brake sensor 9 for detecting a state of a side brake provided for locking the vehicle wheel is provided. The side brake sensor 9 generates a signal that takes different states when the side brake is applied and when it is removed. As the side brake sensor 9, it is possible to use a switch provided to take different states when the side brake is applied and when it is removed.

  The output of the external load driving power generation coil provided in the AC generator is input to the power conversion circuit 11 through the power generation output supply control switch 10 capable of on / off control. The power conversion circuit 11 includes a diode bridge full-wave rectifier circuit and the like, and converts the output of the AC generator 7 (output of the power coil for driving the external load) into a DC output, and the DC output output from the converter 12. And an inverter 13 for converting the power into an AC output. The inverter 13 is a well-known H-bridge circuit in which the upper and lower sides of the bridge are constituted by semiconductor switches such as MOSFETs that can be turned on and off, and the output voltage of the converter 12 is applied between its DC input terminals. An outlet 14 is connected between the AC output terminals of the inverter, and a plug connected to a cord connected to the external load 15 is connected to the outlet. The external load 14 is an arbitrary one that is driven by AC power having a commercial frequency, such as various electric tools and home appliances.

  In the power generator according to the present invention, a mode switch 16 is provided to switch the control mode between the power generation mode and the travel mode. Further, in the present embodiment, an overcurrent detection means 17 is provided as an option to output an overcurrent detection signal when the detected current detected by the inverter 13 exceeds the limit value, and the engine speed is reduced. In order to detect, rotational speed detection means 18 is provided.

  In the present invention, at least the state of the mode change switch 16 and the information on the gear position of the power transmission device detected by the gear position sensor 8 are allowed to operate the power generator (to generate an output from the inverter 13). In order to determine whether or not a “power generation permission condition” that is a condition for this is satisfied, a power generation permission condition determination means 19 is provided.

  In the present invention, the power generation permission condition determination means 19 detects that the gear position is in the power cut-off position by the gear position sensor 8, and the control mode is switched to the power generation mode by the mode switch 16. The power generation permission condition is basically used to determine whether or not the power generation permission condition is satisfied. However, in the present embodiment, the side brake sensor 9 also applies the power generation permission. It is used as a condition that the condition is satisfied.

  In the present embodiment, an overcurrent detection means 17 is further provided, and a condition for determining that the power generation permission condition is satisfied that the overcurrent detection means 17 does not detect that an overcurrent has flown. Used as

  In order to generate AC power having a commercial frequency from the inverter 13 when the power generation permission condition is satisfied, inverter control means 20 is provided for on / off control of the semiconductor switch constituting the inverter 13. Further, an engine control means 21 is provided for controlling the engine 1 when the vehicle is driven and when the power generator is operated.

  The inverter control unit 20 simultaneously turns on the two semiconductor switches at the diagonal positions of the bridge of the inverter 13 when the power generation permission condition determination unit 19 determines that the power generation permission condition is satisfied. As a pair of switches, by applying a drive signal to each pair of switches at a predetermined timing, the polarity of the voltage output from the inverter 13 is alternated, and the DC output supplied from the converter 12 is converted into an AC output having a commercial frequency. To do. The inverter control means 20 also turns on and off the semiconductor switch constituting the lower side or upper side of the bridge with a predetermined duty ratio by using a PWM-modulated waveform as a drive signal applied to the semiconductor switch constituting the lower side or upper side of the bridge of the inverter 13. As a result, the output current of the inverter 13 is PWM-controlled. As a result, an AC output having a predetermined commercial frequency and a voltage value (for example, an effective value of 100 V) whose magnitude is adjusted to the rated value is output from the inverter 13.

  The inverter control means 20 performs control for outputting AC power of commercial frequency from the inverter 13 as described above when the power generation permission condition is satisfied. However, when the power generation permission condition is not satisfied, the inverter control means 20 is for safety. Then, the control of stopping the output of the inverter 13 is performed by stopping the supply of the drive signal to the semiconductor switch of the inverter 13.

  The engine control means 21 is a means for controlling the fuel supply device 2, the ignition device 6, and the throttle operation means 4 in order to operate the engine 1 when the vehicle is running and the power generation device is operating. The engine control means 21 adjusts the opening degree of the throttle valve 5 by controlling the throttle operation means 4 so as to adapt to the running of the vehicle by the mode changeover switch 16 when the control mode is switched to the running mode. The engine control means 21 also gives a fuel injection command Sj having a signal width corresponding to the fuel injection amount to the fuel supply device 2 at an optimal injection start timing determined with respect to the engine speed, throttle valve opening, and the like. At the same time, an ignition signal Si is given to the ignition device 6 at the optimal ignition timing of the engine determined for various control conditions such as the rotational speed of the engine and the throttle valve opening, and the ignition operation is performed.

  Further, the engine control means 21 supplies the required power from the inverter 13 to the external load when the gear position sensor 8 detects that the gear position is in the power cutoff position and the control mode is switched to the power generation mode. The throttle operating means 4 is controlled so as to rotate the alternator at a rotation speed suitable for adjusting the opening of the throttle valve 5. The engine control means 21 also gives a fuel injection command Sj having a signal width corresponding to the fuel injection amount to the fuel supply device 2 at the optimal injection start timing determined with respect to the engine speed, throttle valve opening, and the like. Then, the ignition signal 6 is given to the ignition device 6 at the optimum ignition timing of the engine determined for various control conditions such as the rotational speed of the engine 1 and the throttle valve opening, and the ignition operation is performed. Thereby, the engine 1 is controlled to rotate the AC generator 7 at a rotation speed suitable for supplying required power from the inverter 13 to the external load.

  The engine control means 21 also detects that the gear position is in the power transmission position by the gear position 8 while the inverter 13 is operating, and the rotation speed detection means 18 sets the engine rotation speed to the power generation mode. When it is detected that the time limit value has been exceeded, processing for stopping the engine 1 by stopping the supply of the injection command signal and the ignition signal to the fuel supply device 2 and the ignition device 6 is performed.

  The control device shown in FIG. 1 is made operable when a key switch (not shown) is turned on and a power supply voltage is applied to each part from the battery.

Here, the overall operation of the embodiment shown in FIG. 1 will be described.
In both cases of running the vehicle and driving the power generation device, first, a key switch (not shown) is turned on. When the vehicle travels, the mode change switch 16 further switches the control mode to the travel mode and starts the engine. When the control mode is switched to the traveling mode, the throttle is set so that the opening of the throttle valve 5 coincides with the opening corresponding to the operation amount of the accelerator of the driver so that the engine control means 21 adapts to the traveling of the vehicle. The operating means (actuator) 4 is controlled to control the rotational speed of the engine 1 in accordance with the driver's accelerator operation amount.

  When the power generator is operated to supply power to the external load 15 when the vehicle is stopped, a side brake that locks the wheels of the vehicle is applied and the gear position of the power transmission device is set to the power cutoff position ( After setting to the neutral position or the parking position, the control mode is switched to the power generation mode by the mode switch 16, and the engine is started.

  When the control mode is switched to the power generation mode and the engine is started, the engine control means 21 rotates the alternator 7 at a rotation speed suitable for supplying required power from the inverter 13 to the external load 15. The throttle operating means 4 is controlled to adjust the opening of the throttle valve 5 and the rotational speed of the engine 1 is controlled. The engine control means 21 also sends a fuel injection command Sj having a signal width corresponding to the fuel injection amount to the fuel supply device 2 at the optimal injection start timing determined with respect to the rotational speed of the engine 1 and the throttle valve opening. In addition, an ignition signal Si is given to the ignition device 6 at the optimum ignition timing of the engine determined for various control conditions such as the engine speed and the throttle valve opening, and the ignition operation is performed. At this time, the inverter control means 20 controls the inverter 13 so as to generate an AC output of commercial frequency from the inverter 13.

  When the power generation permission condition is satisfied and electric power is supplied from the inverter 13 to the external load, if the gear position is erroneously switched to the power transmission position, the engine control means 21 performs a process for stopping the engine. At this time, the engine control means 21 returns the throttle valve 5 to the fully closed position, stops supply of the ignition signal to the ignition device 6, stops supply of the injection command signal Sj to the fuel supply device, and stops the engine. Let Accordingly, it is possible to prevent the vehicle from starting when the gear position is erroneously switched to the power transmission position during operation of the power generation device.

  When the rotational speed of the engine 1 exceeds the limit value in the power generation mode for some reason while electric power is supplied from the inverter 13 to the external load 15, the engine control means 21 opens the throttle valve 5 to the fully closed position. In addition, the supply of the ignition signal to the ignition device 6 is stopped, the supply of the injection command signal Sj to the fuel supply device is stopped, and the engine is stopped. As a result, when electric power is supplied from the inverter to the external load, the engine speed is prevented from exceeding the limit value in the power generation mode, and the operation with the overvoltage applied to the load is prevented.

  When the inverter is driven and an external load exceeding the rating of the power generator is connected, etc., and an abnormality that causes the inverter output to become excessive occurs, the overcurrent detection means 17 limits the output current of the inverter. Detect that the value has been exceeded. At this time, it is determined by the power generation permission condition determination means 19 that the power generation permission condition is no longer satisfied, so that the engine control means 21 performs a process for stopping the engine, and the current flowing through the semiconductor switch of the inverter becomes excessive. Prevent the switch from being destroyed.

  When the driver removes the side brake while power is being supplied from the inverter to the external load, it is detected by the side brake sensor that the side brake has been removed. It is determined that the power generation permission condition is no longer satisfied. At this time, since the inverter control means 20 stops the operation of the inverter, it is possible to prevent power from being generated and drive the load in an unstable state where the side brake is removed, thereby improving safety. it can.

  As described above, when the power generation permission condition is no longer satisfied due to various reasons and the operation of the inverter is stopped, when power generation is resumed, the side brake is applied and the gear position is positioned at the power shut-off position. Then, the mode changeover switch 16 is operated to switch the control mode to the power generation mode, and then the mode changeover switch 16 is operated to temporarily switch the control mode to the travel mode and then to the power generation mode again. Only when these operations are performed, the inverter control means 20 operates the inverter and restarts power generation.

  In the control device shown in FIG. 1, the power generation permission condition determining means 19, the inverter control means 20, and the engine control means 21 can be configured by a microprocessor. FIG. 2 is a flowchart showing an example of an algorithm of a task executed by the microprocessor in order to configure the main parts of the power generation permission condition determining unit 19, the inverter control unit 20, and the engine control unit 21.

  In the above description, it is assumed that the fact that the overcurrent has not been detected by the overcurrent detection means 17 is used as a condition for determining that the power generation permission condition is satisfied. In the example shown, in order to simplify the explanation, the fact that no overcurrent has been detected by the overcurrent detection means 17 is used as a condition for determining that the power generation permission condition is satisfied. It is not. In the above description, the engine speed is also stopped when the engine speed exceeds the limit value in the power generation mode by the engine speed detection means 18, but in the example of FIG. Exceeding the limit value in the mode is not used as a condition for stopping the engine.

  In the task processing shown in FIG. 2, there are four system states: an IDLE state (standby state), a READY state (ready state), an OUTPUT state (output state), and a STOP state (stop state). As shown in FIG. 3, the state is changed when a predetermined condition is satisfied. The IDLE state (standby state), READY state (ready state), OUTPUT state (output state), and STOP state (stop state) are the following states, respectively.

The IDLE state (idle state) is a state in which any of the following IDLE conditions is satisfied.
(I) The gear position is in the power transmission position (position other than the neutral position and the parking position).
(Ii) The READY condition and the OUTPUT condition are satisfied except that the side brake is not applied.
(Iii) The key switch is turned on and the inverter is powered on (the power generation output supply control switch 10 is turned on), and the mode switch is in the power generation mode.
When the system is in the IDLE state, the inverter does not generate a power generation output and waits for the READY condition described later to be satisfied. The initial state of the system after the key switch is turned on is the IDLE state.

The READY state (ready state) is a state in which all of the following READY conditions are satisfied.
(I) The gear position is a power cutoff position (neutral position and parking position).
(Ii) The mode switch is switched to the travel mode.
(Iii) The side brake is applied.
When the system is in this READY state, the inverter does not generate a power generation output and waits for the OUTPUT condition to be satisfied.

The OUTPUT state (output state) is a state where all the following OUTPUT conditions are satisfied.
(I) The gear position is a power cutoff position (neutral position and parking position).
(Ii) The mode switch was switched from the running mode to the power generation mode.
(Iii) The side brake is applied.
The inverter generates a power output when the system is in the OUTPUT state.

The STOP state (stopped state) is a state where all the following STOP conditions are satisfied.
(I) The gear position is in the power transmission position (position other than the neutral position and the parking position).
(Ii) The mode switch is switched to the power generation mode.
When the system is in the STOP state, the engine is stopped, and this state is maintained until the key switch (a power switch that is turned on when the vehicle is driven and the power generator is operated) is turned off. .

  The task process shown in FIG. 2 is repeatedly executed at a constant cycle, for example, a cycle of 32 msec. The period for executing this processing is appropriately set according to the characteristics of the system such as the response of the mode switch.

  In the case of the illustrated algorithm, first, in step S1, it is determined whether or not the system state is the STOP state. If the result is STOP, the process is terminated after stopping the engine in step 2. When it is determined in step S1 that it is not in the STOP state, the process proceeds to step S3 to determine whether or not the gear position is a neutral position or a parking position. As a result, when it is determined that the position is neither the neutral position nor the parking position, the process proceeds to step S4 to set a flag indicating that the system state is the IDLE state and stop the operation of the inverter. After that, in step S5, it is determined whether or not the control mode is the power generation mode. If it is determined in step S5 that the power generation mode is selected, the process proceeds to step S6, and after setting a flag indicating that the system is in the STOP state, this process is terminated.

  If it is determined in step S3 that the gear position is at the neutral position or the parking position, the process proceeds to step S7 to perform processing for determining the current state from a flag indicating the state of the system.

  As a result of the determination process in step S7, when it is determined that the system state is the IDLE state, the process proceeds to step S8 to determine whether or not the current control mode is the traveling mode. As a result, if it is in the traveling mode, the process proceeds to step S9 to set a flag indicating that the system state is the READY state, and this process is ended. When it is determined in step S8 that the control mode is the power generation mode, the process proceeds to step S10 to set a flag indicating that the system state is the IDLE state, and then this process is terminated.

  When it is determined in the determination process in step S7 that the system state is the READY state, the process proceeds to step S11 to determine whether or not the current control mode is the power generation mode. As a result, if it is not in the power generation mode, this process is skipped without doing anything thereafter. In step S11, when it is determined that the current control mode is the power generation mode, the process proceeds to step S12 to determine whether or not the side brake is applied. As a result, when it is determined that the side brake is applied, the process proceeds to step S13 to set a flag indicating that the state of the system is the OUTPUT state and start the operation of the inverter. To supply power. If it is determined in step S12 that the side brake has been removed, the process proceeds to step S14 to set a flag indicating that the system state is the IDLE state, and the process is terminated.

  When it is determined in the determination process in step S7 that the system state is the OUTPUT state, the process proceeds to step S15 to determine whether or not the current control mode is the traveling mode. As a result, when it is determined that the control mode is the power generation mode, the process proceeds to step S16 to determine whether or not the side brake is applied. As a result, when the side brake is applied, this process is terminated without doing anything thereafter. If it is determined in step S16 that the side brake is not applied, the process proceeds to step S17 to set a flag indicating that the system is in the IDLE state, and the process is terminated.

  When it is determined in step S15 that the control mode is the traveling mode, the process proceeds to step S18 to set a flag indicating that the system is in the READY state and stop the operation of the inverter to reduce the power from the inverter to the external load. After the supply is stopped, this process is terminated.

  In the case of the algorithm shown in FIG. 2, when the power generation permission condition is not satisfied and the system is put into the STOP state and the engine is stopped, the key switch is turned off and then turned on again to reset the system. The system is kept in the STOP state until it is done. Since the initial state of the system after the key switch is turned on is the IDLE state, if the gear position is the neutral position or the parking position, it is determined in step S7 that the system is in the IDLE state. Therefore, step S8 is executed and it is determined whether the control mode is the traveling mode or the power generation mode. When the control mode is the traveling mode, the system is brought into the READY state, and the inverter is held in the stopped state. At this time, the engine control means controls the engine 1 so as to adapt to the running of the vehicle. When the control mode is switched to the power generation mode, step S10 is executed subsequent to step S8, and the system state is changed to the IDLE state. In the state where the mode changeover switch is kept in the power generation mode position, Even when this process is executed, step S10 is executed, so that the transition to the OUTPUT state is not performed.

  On the other hand, once the mode changeover switch is switched to the travel mode side, step S9 is executed subsequent to step S8, so that the system is brought into the READY state, and the next time this process is performed, step S11 is executed. Executed. At this time, it is determined in step S11 that the control mode is the travel mode. However, if the mode switch is once switched to the travel mode side and then switched to the power generation mode side again, the control mode is the power generation mode in step S11. Since the determination is made, step S12 is subsequently executed. If the side brake is applied here, step S13 is executed subsequent to step S12, and the state of the system is changed to the OUTPUT state. Therefore, driving of the inverter is started and power generation is started.

  As described above, in the present invention, it is detected that the side brake is applied, and after the control mode is switched to the power generation mode in a state where the gear position is detected to be in the power cutoff position, The inverter control means starts the operation of the inverter only when it is once switched to the running mode and then switched again to the power generation mode. With this configuration, the power generator will not start even if the operator switches the control mode to the power generation mode by operating the mode switch after the gear position is set to the neutral position or parking position. Thus, the operator's attention can be alerted, and this can motivate reconfirmation of the external load state (whether the power switch is turned on, etc.). Therefore, when the power generation device is started, it is possible to reduce a possibility that an abnormal situation such as the load moving unexpectedly occurs against the operator's will.

  When the system is in the OUTPUT state and generating the power generation output from the inverter and the side brake is removed, step S17 is executed and the system state is changed to the IDLE state. Is stopped. This prevents power generation in an unstable state with the side brake removed.

  In the case of the algorithm shown in FIG. 2, steps S1 to S6, S7, S8, S9, S10, S11, S15 and S18, and the process for controlling the fuel supply device 2, the throttle operating means 4 and the ignition device 6 are performed. The engine control means is configured by a task (not shown) that performs the above. Further, the power generation permission condition determining means is constituted by steps S1, S3, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16, S17 and S18, and steps S9, S10, S13, S14, S18, The inverter control means is constituted by S17 and a task (not shown) for performing processing for determining the switch pattern of the semiconductor switch of the inverter 13.

  In order to improve safety when operating the power generation device, as in the above-described embodiment, it is one of the conditions for determining that the power generation permission condition is satisfied that the side brake is applied. However, the fact that the side brake is applied can be excluded from the condition for determining that the power generation permission condition is satisfied.

  In the above embodiment, the fact that the output current of the inverter does not exceed the limit value is one of the conditions for determining that the power generation permission condition is satisfied, but the inverter output current exceeds the limit value. This can be excluded from the condition for determining that the power generation permission condition is satisfied.

  In the above embodiment, the engine is stopped when the rotational speed of the engine exceeds the limit value while the power generation device is operating. However, the rotational speed of the engine is low when the power generation device is operating. Instead of stopping the engine when the limit value is exceeded, control for reducing the rotation of the engine may be performed.

It is the block diagram which showed one structural example of the system which consists of an engine and a generator, and the control apparatus of this invention which controls these. FIG. 2 is a flowchart showing an example of a task algorithm executed by a microprocessor in order to configure a main part of the control device of FIG. 1. FIG. It is a flowchart for demonstrating the transition of the state of the system in the case of based on the algorithm shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Engine 2 Fuel supply apparatus 4 Throttle operation means 7 AC generator 8 Gear position sensor 9 Side brake sensor 12 Converter 13 Inverter 15 External load 16 Mode change switch 17 Overcurrent detection means 18 Rotation speed detection means 19 Power generation permission condition determination means 20 Inverter control means 21 Engine control means

Claims (4)

An AC generator driven by a vehicle driving engine, a converter for converting the output of the AC generator to a DC output, and an inverter for converting the DC output to an AC output of a commercial frequency, and an external load from the inverter A control device for controlling the engine and the power generation device of a vehicle equipped with a power generation device for supplying power to the vehicle,
The power position of the power transmission device that transmits power from the engine to the drive wheels of the vehicle is a power transmission position that is a position for transmitting power to the drive wheels, or is a position that interrupts transmission of power. A gear position sensor that detects whether it is in the blocking position;
A mode switch for switching the control mode between the power generation mode and the traveling mode;
Power generation permission condition determination for determining whether or not the power generation permission condition is satisfied with the power generation permission condition that at least the gear position is detected at the power cutoff position and the control mode is switched to the power generation mode. Means,
When it is determined by the power generation permission condition determining means that the power generation permission condition is satisfied, an AC output of a commercial frequency is generated from the inverter, and when the power generation permission condition is not satisfied, the operation of the inverter is performed. Inverter control means for controlling the inverter to stop;
When the control mode is switched to the travel mode, the engine speed is controlled so as to adapt to the travel of the vehicle, and it is detected that the gear position is in the power shut-off position, and the control mode is When the mode is switched, the rotation speed of the engine is controlled to rotate the alternator at a rotation speed suitable for supplying required power from the inverter to the external load, and the inverter is operated. Engine control means for controlling the engine to stop the engine when it is detected that the gear position is in the power transmission position in a state of being
Comprising
The inverter control means switches to the power generation mode after the control mode is switched to the power generation mode in a state where the power generation permission condition determination means determines that the power generation permission condition is satisfied, and then switches to the power generation mode again. The power generator-equipped vehicle control device is configured to operate the inverter only when the inverter is operated. A side brake sensor for detecting a state of a side brake of the vehicle is further provided;
In addition to detecting that the gear position is in the power cut-off position and that the control mode is switched to the power generation mode, the power generation permission condition determining means applies a side brake by the side brake sensor. 2. The power generator-equipped vehicle control device according to claim 1, wherein the power generation permission condition is also determined to be detected as being generated, and whether or not the power generation permission condition is satisfied is determined. Overcurrent detection means for detecting whether the output current of the inverter exceeds a limit value is further provided,
In addition to detecting that the gear position is in the power cut-off position and that the control mode is switched to the power generation mode, the power generation permission condition determination unit is configured to detect the inverter by the overcurrent detection unit. The power generation device mounted according to claim 1 or 2, wherein the power generation permission condition is determined not to detect that the output current exceeds the limit value, and whether or not the power generation permission condition is satisfied is determined. Vehicle control device.   The engine control means is configured to stop the engine even when the rotational speed of the engine exceeds a limit value in a power generation mode while the inverter is operating. Or the control device for a vehicle equipped with the power generation device according to 3.

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