JP5365492B2 - Abnormality diagnosis device for power generation device and electrically driven vehicle - Google Patents

Description

  The present invention relates to an abnormality diagnosis device for a power generation device and an electrically driven vehicle.

  Conventionally, the required vehicle drive energy consumption rate (energy consumption per unit time required to drive the vehicle with the driving force requested by the driver) is calculated based on the accelerator operation amount, etc., and the fuel injection amount, etc. The actual vehicle driving energy consumption rate (energy consumption per unit time consumed to drive the vehicle) is calculated based on the above, and the actual vehicle driving energy consumption rate is larger than the required vehicle driving energy consumption rate by a determination value or more. There is known an abnormality diagnosis device that determines whether or not there is an abnormality in vehicle driving force depending on whether or not (see, for example, Patent Document 1).

  Further, after the generator voltage of the alternator starts to change, the difference between each value of the intake air amount, the intake pressure and the battery voltage representing the engine load and each value before the change of the generated voltage is detected, and the generated voltage Alternator control for determining that the alternator and its control system are abnormal when the difference does not exceed a determination value determined in accordance with the amount of change in the generated voltage within a predetermined period after starting to change A diagnostic device is known (see, for example, Patent Document 2).

JP 2007-120334 A JP 2009-183064 A

  By the way, in the devices of Patent Documents 1 and 2, the determination value for failure diagnosis is fixed. For this reason, although the power generation state of the power generator changes depending on the temperature of the power generator and the control method, the determination value of the failure diagnosis is fixed, so that the determination accuracy of the failure diagnosis is not necessarily good. .

  The present invention has been made in view of the above problems, and provides an abnormality diagnosis device for an electric power generation apparatus and an electrically driven vehicle capable of improving the accuracy of diagnosis of the presence or absence of abnormality of the electric power generation apparatus than before. Objective.

In order to solve the above-described problem, an abnormality diagnosis device for a power generation device is provided for diagnosing an abnormality in a power generation state of the power generation device, which changes depending on an operation state of the power generation device including an engine and a generator that is generated by the engine Calculate a reference value that is a reference value and is a target power generation state of the generator assumed by the operating state of the engine, and compare the target power generation state of the generator and the actual power generation state of the generator by, a control unit for diagnosing the presence or absence of abnormality of the power generator, the power generation device is a portable power generating apparatus for charging a battery mounted on an electric powered vehicle, the operating state of the engine, and A first management unit that manages the amount of power generated by the generator; and the electric drive vehicle includes a second management unit that manages a state of charge of the battery. One of the means and the second management means includes first table information that associates the operating state of the engine, the state of charge of the battery, and the target power generation amount of the generator, and the control means, The control means acquires information managed by the other of the first management means and the second management means, and based on the first table information, the operating state of the engine, and the state of charge of the battery Calculating the target power generation amount of the generator, and comparing the power generation amount of the generator with the calculated target power generation amount of the generator, thereby diagnosing the presence or absence of abnormality of the generator , To do. According to such a configuration, the reference value is changed according to the operating state of the power generation device, and the presence or absence of abnormality of the power generation device is diagnosed. Therefore, the diagnosis accuracy of the presence or absence of abnormality of the power generation device can be improved as compared with the conventional case. it can. In addition, since the output from the engine changes depending on the operating state of the engine, based on the target power generation state of the generator commensurate with the expected output from the engine and the actual power generation state of the generator, The presence / absence can be diagnosed, and the diagnostic accuracy of the presence / absence of the abnormality of the generator can be improved as compared with the conventional case. Considering not only the operating state of the engine but also the state of charge of the battery mounted on the electrically driven vehicle, it is possible to diagnose the presence or absence of an abnormality in the generator, and more accurately diagnose the presence or absence of an abnormality in the generator than before. Can be improved. In addition, since the diagnosis of whether there is an abnormality in the generator is performed using information managed separately by the portable power generator and the electrically driven vehicle, power generation according to the type and performance of the portable power generator Diagnose the presence or absence of machine abnormalities.

  More preferably, in the first table information, an operation state of the engine, a charge state amount of the battery, a target power generation amount of the generator, and a correction value for correcting the target power generation amount of the generator are associated. The control means acquires the target power generation amount and the correction value of the generator based on the first table information, the operating state of the engine, and the charge state amount of the battery, and based on the correction value The corrected target power generation amount is calculated, and by comparing the power generation amount of the generator with the corrected target power generation amount, the presence or absence of abnormality of the generator is diagnosed. According to such a configuration, the target power generation amount that changes based on the engine operating state and the battery charge state amount can be corrected using the correction value. Can be improved.

  Also preferably, the first management means further manages the fuel consumption of the engine, and in the first table information, the operating state of the engine, the charge state amount of the battery, the fuel consumption of the engine, A target power generation amount of the generator and a correction value for correcting the target power generation amount of the generator are associated, and the control means is information managed by the other of the first management means and the second management means And calculating a target power generation amount of the generator based on the first table information, the engine operating state, the fuel consumption amount of the engine, and the charge state amount of the battery, The presence or absence of abnormality of the generator is diagnosed by comparing the amount with the calculated target power generation amount of the generator. According to such a configuration, it is possible to diagnose whether there is an abnormality in the generator in consideration of not only the operating state of the engine but also the fuel consumption amount of the engine and the charge state amount of the battery mounted on the electrically driven vehicle. As a result, it is possible to improve the diagnostic accuracy of the presence or absence of an abnormality in the generator. In addition, since the diagnosis of whether there is an abnormality in the generator is performed using information managed separately by the portable power generator and the electrically driven vehicle, power generation according to the type and performance of the portable power generator Diagnose the presence or absence of machine abnormalities.

  More preferably, the control means, based on the first table information, the engine operating state, the fuel consumption of the engine, and the state of charge of the battery, the target power generation amount and the correction value of the generator. And calculating a corrected target power generation amount based on the correction value, and comparing the power generation amount of the generator with the corrected target power generation amount, thereby diagnosing whether there is an abnormality in the generator It is characterized by doing. According to this configuration, the target power generation amount that changes based on the engine operating state, the battery charge state amount, and the engine fuel consumption amount can be corrected using the correction value. The diagnostic accuracy of the presence or absence of can be improved.

More preferably, any one of the first management means and the second management means is associated with a fuel consumption amount of the engine, a CO ₂ emission amount of the engine, and a legal limit value of the CO ₂ emission amount. Whether the CO ₂ emission amount of the engine exceeds the legal limit value based on the actual fuel consumption amount of the engine and the second table information. It is characterized by diagnosing. According to such a configuration, it is possible not only to diagnose the presence or absence of an abnormality in the generator, but also to diagnose whether or not the CO ₂ emission amount from the engine exceeds the legal limit value.

  Moreover, an electrically driven vehicle includes the abnormality diagnosis device for a power generation device according to any one of claims 1 to 7.

  ADVANTAGE OF THE INVENTION According to this invention, the diagnostic accuracy of the presence or absence of abnormality of a power generator can be improved compared with the past.

1 is a diagram schematically showing an electrically driven vehicle 1A. FIG. It is a figure showing typically power generator 11A. It is a figure which shows the structure of vehicle side ECU30. It is a figure which shows the relationship between the operating state of the engine 111, the temperature of cooling water, the rotation speed of the engine 111, the load factor of the engine 111, the power generation efficiency of the generator 112, and the target power generation amount of the generator 112. It is a figure which shows the relationship between the control state of the engine 111, the temperature of cooling water, the rotation speed of the engine 111, the load factor of the engine 111, the power generation efficiency of the generator 112, and the target power generation amount of the generator 112. It is a figure which shows the relationship between the charge condition amount of the battery 12, and the electric current which generate | occur | produces from the generator 112 when the generator 112 charges the battery 12 with a constant voltage. It is a figure which shows the table information in which the operating state of the engine 111, the charge amount of the battery 12, the fuel consumption of the engine 111, the target power generation amount of the generator 112, and the correction value of the target power generation amount are associated. . It is a flowchart which shows the abnormality diagnosis process of 11 A of electric power generation apparatuses performed by vehicle side ECU30. It is a flowchart which shows the modification of the abnormality diagnosis process of 11 A of power generators performed by vehicle side ECU30. This is table information in which the fuel consumption amount of the engine 111, the CO ₂ emission amount of the engine 111, and the legal limit values of the CO ₂ emission amount are associated with each other.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram schematically showing an electrically driven vehicle 1A. As shown in FIG. 1, the electrically driven vehicle 1 </ b> A includes a power generator 11 </ b> A, a battery 12, and an electric motor 13. Electric drive type vehicle 1A is equipped with power generator 11A so that attachment or detachment is possible. The electrically driven vehicle 1A in which the power generation device 11A is detachably mounted can be operated even when the power generation device 11A is not mounted and the electrical connection with the power generation device 11A is disconnected. . Of the electrically driven vehicle 1 </ b> A, a portion other than the power generation device 11 </ b> A that is detachably mounted constitutes a vehicle body. The power generation device 11A is an engine-driven power generation device and a portable power generation device.

  FIG. 2 is a diagram schematically showing the power generator 11A. As shown in FIG. 2, the power generator 11 </ b> A includes an engine 111, a power generator 112, a power generator-side ECU (Electronic Control Unit) 113 </ b> A (first management means), and an operation switch 114. Yes. The generator 112 is an alternator, for example.

  The engine 111 drives a generator 112, and the driven generator 112 generates an alternating current. The generated alternating current is rectified into direct current by a rectifier circuit (not shown) (for example, built in the generator 112 or mounted in the electrically driven vehicle 1A) before charging the battery 12. The power generator ECU 113A is provided mainly for controlling the engine 111. The operation switch 114 is provided to operate and stop the power generator 11A. Specifically, the operation switch 114 is a switch that can operate and stop the power generator 11A alone in a state where the electrical connection with the vehicle body is disconnected. The operation switch 114 is electrically connected to the power generator ECU 113A. Further, the power generation device side ECU 113A periodically transmits a connection signal to a vehicle side ECU 30 (second management means) described later. The vehicle side ECU 30 recognizes that the power generation device 113A is mounted on the electrically driven vehicle 1A by receiving the connection signal from the power generation device side ECU 113A. Further, the power generation device side ECU 113 </ b> A recognizes that it is connected to the vehicle side ECU 30 by receiving a response signal from the vehicle side ECU 30.

  The power generation device 11A includes a water temperature measurement unit 115 that measures the temperature of cooling water in the engine 111, a fuel consumption measurement unit 116 that measures the fuel consumption of the engine 111, and a rotation speed measurement unit 117 that measures the rotation speed of the engine 111. And a power generation amount measuring unit 118 that measures the power generation amount of the generator 112. The water temperature measurement unit 115, the fuel consumption measurement unit 116, the rotation speed measurement unit 117, and the power generation amount measurement unit 118 are connected to the power generation device side ECU 113A, and each measurement result is output to the power generation device side ECU 113A. The power generation device side ECU 113A manages information on the temperature of the cooling water in the engine 111, the fuel consumption of the engine 111, the rotation speed of the engine 111, and the power generation amount of the generator 112. The power generation device side ECU 113A transmits information on the temperature of the cooling water in the engine 111, the fuel consumption amount of the engine 111, the rotation speed of the engine 111, and the power generation amount of the generator 112 to the vehicle side ECU 30 as necessary. Note that the power generation device 11A may be provided with a temperature measurement unit that measures the temperature of the engine 111 or the generator 112, instead of the water temperature measurement unit 115.

  Further, after the engine 111 is warmed up, the engine 111 can be operated in any one of the low power mode, the optimum fuel consumption mode, and the quick charge mode under the control of the power generator ECU 113A or the vehicle ECU 30. The optimum fuel consumption mode is a mode in which the fuel consumption of the engine 111 is the best. The low power mode is a so-called energy saving mode, and is a mode in which the power generation amount of the generator 112 is reduced from the power generation amount in the optimum fuel consumption mode. The quick charge mode is a mode in which the power generation amount of the generator 112 is increased from the power generation amount in the optimal fuel consumption mode in order to charge the battery 12 in a short time. The low power mode, the optimum fuel consumption mode, or the quick charge mode shows an example of the control state of the engine 111.

  Returning to FIG. 1, the battery 12 is a direct current battery, and is electrically and detachably connected to the power generator 11 </ b> A. As the battery 12, for example, a battery in which a plurality of batteries having a rated voltage of DC 12V are connected in series can be applied. The electric motor 13 is a traveling drive source and is a direct current motor. The electric motor 13 is supplied with electric power from the battery 12 and rotates the output shaft 14. Then, the rotation output is transmitted to the pair of left and right rear wheels 2 as drive wheels via the transmission 15, and as a result, the rear wheels 2 are driven. Thus, the electrically driven vehicle 1A is a series hybrid electrically driven vehicle.

  The electrically driven vehicle 1A includes a pair of left and right rear wheels 2 as drive wheels, a pair of left and right front wheels 3 as steering wheels, a handle 4 for manually steering the front wheels 3, and a motor rotation speed of an electric motor 13. An accelerator pedal 5 for changing the vehicle, a brake pedal 6 and a brake unit 7 for applying braking to the vehicle, a wire connection to the brake pedal 6 and a connection to the brake unit 7, and each front wheel 2, each rear wheel 3 and a drum brake 8 provided respectively on 3. The accelerator pedal 5 is provided with an accelerator opening sensor 25 for detecting the depression amount of the accelerator pedal 5, and the brake pedal 6 is provided with a brake switch 26 for detecting whether or not the brake pedal 6 is depressed.

  Further, the electrically driven vehicle 1 </ b> A includes a key switch 21. The key switch 21 is a switch that can be selectively switched between ON and OFF. The key switch 21 is an operation means for making an operation request to the power generation device 11 </ b> A and the electric motor 13. Specifically, when the key switch 21 is ON, an operation request is made. When the key switch 21 is OFF, there is no operation request.

  Furthermore, the electrically driven vehicle 1A includes a vehicle-side ECU 30 that is a second control device. The vehicle-side ECU 30 functions as an abnormality diagnosis device for the power generation device 11A. FIG. 3 is a diagram illustrating a configuration of the vehicle-side ECU 30. The vehicle-side ECU 30 includes a microcomputer 31 including an CPU 31A, a ROM 31B, a RAM 31C, and the like, and an input / output circuit 32. The ROM 31B is configured to store a program in which various processes executed by the CPU 31A are described, map data, and the like. Based on the program stored in the ROM 31B, the CPU 31A executes processing while using the temporary storage area of the RAM 31C as necessary, so that the control means is functionally realized in the vehicle-side ECU 30 and the power generation device-side ECU 113A. The

  The input / output circuit 32 inputs signals from various sensors and switches and outputs a drive signal to the electric motor 13. The power generation device side ECU 113A corresponding to the first control device has the same configuration. A power generator 11A (more specifically, a power generator ECU 113A) is electrically and detachably connected to the vehicle ECU 30. Various control objects such as the electric motor 13 are electrically connected to the vehicle-side ECU 30, and various sensors and switches such as a key switch 21, an accelerator opening sensor 25, and a brake switch 26 are electrically connected. It is connected to the.

  When the key switch 21 is OFF, the vehicle-side ECU 30 is in a standby state in which various control operations can be appropriately executed as necessary. In the standby state, the vehicle-side ECU 30 can specifically detect the state of sensors and switches, control various control objects other than the electric motor 13, output a driving request signal, and the like. For example, when there are a plurality of rated voltage DC12V batteries constituting the battery 12 in the vehicle-side ECU 30, power can be supplied from any one of these batteries.

  In addition, the electrically driven vehicle 1 </ b> A is configured to charge the battery 12 and the warning lamp 41 that notifies the driver that there is an abnormality in the power generation state of the generator 112 (specifically, the generated voltage, the generated current, or the generated power). A charge state quantity detection sensor 42 for detecting a state quantity (SOC). The warning lamp 41 and the state of charge detection sensor 42 are connected to the vehicle side ECU 30. The vehicle-side ECU 30 manages the charge state amount of the battery 12 detected by the charge state amount detection sensor 42, and transmits information on the charge state amount of the battery 12 to the power generation device-side ECU 113A as necessary.

  FIG. 4 is a diagram showing the relationship between the operating state of the engine 111, the temperature of the cooling water, the rotational speed of the engine 111, the load factor of the engine 111, the power generation efficiency of the power generator 112, and the target power generation amount of the power generator 112. .

  In FIG. 4, the temperature of the cooling water in the engine 111 rises when the engine 111 is started and during warm-up, and becomes a constant value after the engine 111 is warmed up. The rotational speed of the engine 111 increases rapidly when the engine 111 is started, but becomes a constant value after the engine 111 is warmed up. When the rotation speed of the engine 111 becomes constant, the rotation speed of the generator 112 that is linked to the engine 111 becomes constant. As a result, the power generation amount of the generator 112 is constant.

  The load factor of the engine 111 increases rapidly when the engine 111 is started. Since the engine friction is reduced while the engine 111 is warming up, the load factor of the engine 111 is also reduced. After the engine 111 is warmed up, the load factor of the engine 111 becomes a constant value. The power generation efficiency of the generator 112 decreases as the temperature of the cooling water increases. Therefore, the power generation efficiency of the power generator 112 is lowered when the engine 111 is started and warmed up, and becomes a constant value after the engine 111 is warmed up. Note that the rate of change in power generation efficiency per unit temperature (1 ° C.) of the cooling water is determined in advance, and the power generator ECU 113A determines the rate of change in power generation efficiency per unit temperature (1 ° C.) of the cooling water. Based on this, the power generation efficiency of the generator 112 can be calculated. Further, the electric device side ECU 113 </ b> A is preliminarily provided with information on the power generation efficiency of the generator that changes in accordance with the control state of the engine 111.

  The target power generation amount of the generator 112 is calculated by multiplying the power generation amount determined by the rotation speed of the generator 112 by the power generation efficiency of the generator 112. Further, the target power generation amount of the generator 112 is corrected according to a correction value determined based on the temperature of the cooling water, the state of charge of the battery 12, and the like, as will be described later. The reason for the correction is that the power generation amount of the generator 112 increases or decreases based on the temperature of the cooling water, the state of charge of the battery 12, and the like. For example, as the temperature of the engine or the temperature of the cooling water rises, the engine friction decreases, and the power generation amount of the generator 112 increases by this decrease. In order to cope with an increase in the amount of power generation corresponding to the decrease in engine friction, the target power generation amount of the generator 112 is corrected. Note that the target power generation amount of the generator 112 is not necessarily corrected. That is, the correction value determined based on the temperature of the cooling water, the state of charge of the battery 12, and the like may be “0”.

  FIG. 5 is a diagram showing the relationship between the control state of the engine 111, the temperature of the cooling water, the rotation speed of the engine 111, the load factor of the engine 111, the power generation efficiency of the power generator 112, and the target power generation amount of the power generator 112. .

  In FIG. 5, it is assumed that the engine 111 is in a state after being warmed up and the temperature of the cooling water is constant. Since the power generation amount of the generator 112 in the low power mode may be smaller than the power generation amount of the generator 112 in the optimal fuel consumption mode and the quick charge mode, the rotational speed of the engine 111 in the low power mode depends on the optimal fuel consumption mode and the quick charge mode. Less than the number of revolutions of the engine 111 in the mode. On the other hand, since the power generation amount of the generator 112 in the quick charge mode needs to be larger than the power generation amount of the generator 112 in the low power mode and the optimum fuel consumption mode, the rotational speed of the engine 111 in the quick charge mode is low. This is higher than the number of revolutions of the engine 111 in the power mode and the optimum fuel consumption mode. The number of revolutions of the engine 111 increases in the order of the low power mode, the optimum fuel consumption mode, and the quick charge mode. Similarly, the load factor of the engine 111, the power generation efficiency of the power generator 112, and the target power generation amount of the power generator 112 also increase in the order of the low power mode, the optimum fuel consumption mode, and the quick charge mode. As described above, the target power generation amount of the generator 112 is corrected according to the correction value determined based on the temperature of the cooling water, the state of charge of the battery 12, and the like.

  FIG. 6 is a diagram illustrating the relationship between the state of charge of the battery 12 and the current generated from the generator 112 when the generator 112 charges the battery 12 with a constant voltage.

  For example, when the generator 112 charges the battery 12 with a constant voltage, as shown in FIG. 6, the current value generated from the generator 112 decreases as the state of charge of the battery 12 increases. For this reason, even if the rotation speed of the engine 111 is constant, the amount of power generated by the generator 112 varies according to the state of charge of the battery 12. Therefore, when the vehicle-side ECU 30 determines the target power generation amount of the generator 112, the vehicle-side ECU 30 preferably takes into account the state of charge of the battery 12.

  FIG. 7 shows table information in which the operation state of the engine 111, the charge state amount of the battery 12, the fuel consumption amount of the engine 111, the target power generation amount of the generator 112, and the correction value of the target power generation amount are associated. FIG. The table information (first table information) in FIG. 7 is stored, for example, in the ROM 31B of the vehicle-side ECU 30. Moreover, ROM31B of vehicle side ECU30 may be provided with several table information of FIG. 7 according to the kind and performance of 11 A of electric power generation apparatuses.

  The CPU 31A of the vehicle-side ECU 30 acquires information on the temperature of the cooling water from the water temperature measurement unit 115 of the power generation device 11A and / or information on the control state of the engine 111 from the power generation device-side ECU 113A. Then, the CPU 31A of the vehicle-side ECU 30 acquires the target power generation amount and the correction value of the target power generation amount based on the information on the temperature of the cooling water and / or the information on the control state of the generator 112 and the table information in FIG. Then, the target power generation amount is corrected based on the correction value, and the final target power generation amount is calculated.

  Note that the CPU 31A of the vehicle-side ECU 30 provides information on the charge state amount of the battery 12 from the charge state amount detection sensor 42 and / or the power generator side in addition to the information on the temperature of the cooling water and / or information on the control state of the engine 111 Information on fuel consumption may be acquired from the ECU 113A. In this case, the CPU 31A of the vehicle-side ECU 30 acquires the target power generation amount and the correction value of the target power generation amount based on the plurality of acquired information and the table information of FIG. 7, and calculates the target power generation amount based on the correction value. Compensate and calculate the final target power generation amount.

  In FIG. 7, various values (A1 to A6, B1 to B14, C1 to C14, D1 to D14, and E1 to E7) are changed depending on the type and performance of the power generator 11A. Moreover, the table information of FIG. 7 is an example, and is not limited to this. For example, the table information in FIG. 7 may be table information in which the operating state of the engine 111, the charge state amount of the battery 12, and the target power generation amount of the generator 112 are associated. 7 may be table information in which the operating state of the engine 111, the state of charge of the battery 12, the target power generation amount of the generator 112, and the correction value of the target power generation amount are associated with each other. Good.

  FIG. 8 is a flowchart showing an abnormality diagnosis process for the power generation apparatus 11 </ b> A, which is executed by the vehicle-side ECU 30. In this process, it is assumed that the power generator 11A is mounted on the electrically driven vehicle 1A.

  First, the vehicle-side ECU 30 acquires the temperature of the cooling water measured by the water temperature measuring unit 115 and / or the control state of the engine 111 and the charge state amount of the battery 12 detected by the charge state amount detection sensor 42 ( Step S1). The vehicle-side ECU 30 acquires the temperature of the cooling water and / or the control state of the engine 111 via the power generation device-side ECU 113A. Next, the vehicle-side ECU 30 determines whether or not the power generation device 11A satisfies the determination possible condition for the abnormality diagnosis process (step S2). The condition for determining the abnormality diagnosis process is that the first idle of the engine 111 exceeds a predetermined number (for example, 500 RPM) or that a predetermined time (for example, 30 seconds) has elapsed since the engine 111 is started. is there.

  If the power generation device 11A determines that the determination condition for the abnormality diagnosis process is not satisfied (NO in step S2), the vehicle-side ECU 30 returns to step S1. On the other hand, when the vehicle-side ECU 30 determines that the power generation device 11A satisfies the determination condition for the abnormality diagnosis process (YES in step S2), the vehicle-side ECU 30 determines that the engine 111 measured by the fuel consumption measuring unit 116 is used. The amount of power consumed by the generator 112 and the amount of power generated by the power generator 112 measured by the power generation amount measuring unit 118 are acquired via the power generator ECU 113A (step S3). Thereafter, the vehicle-side ECU 30 determines the temperature of the cooling water acquired in step S1 and / or the control state of the engine 111, the charge state amount of the battery 12 acquired in step S1, and the engine 111 acquired in step S3. Based on the fuel consumption amount and the table information of FIG. 7, the target power generation amount and the correction value of the target power generation amount are acquired, and the corrected target power generation amount is calculated based on the correction value (step S4).

  The vehicle side ECU 30 determines whether or not the power generation amount of the power generator 112 acquired in step S3 exceeds the corrected target power generation amount (step S5). When the vehicle-side ECU 30 determines that the power generation amount of the generator 112 exceeds the corrected target power generation amount (YES in step S5), the power generation device 11A performs normal operation (step S6), and the process proceeds to step S1. Return. When the vehicle-side ECU 30 determines that the power generation amount of the generator 112 does not exceed the corrected target power generation amount (NO in step S5), the vehicle-side ECU 30 lights the warning lamp 41 (step S7). Return to step S1.

  In step S4, the vehicle-side ECU 30 uses the charge state amount of the battery 12 and the fuel consumption amount of the engine 111 to calculate the corrected target power generation amount. The target power generation amount may be calculated. In this case, the abnormality diagnosis process of the power generator 11A is executed without considering the state of charge of the battery 12 and the fuel consumption of the engine 111.

  FIG. 9 is a flowchart illustrating a modified example of the abnormality diagnosis process of the power generation apparatus 11 </ b> A executed by the vehicle-side ECU 30. Note that the description of the same steps as those in FIG. 8 is omitted.

  After step S1, the vehicle-side ECU 30 is based on the temperature of the cooling water acquired in step S1 and / or the control state of the engine 111, the state of charge acquired in step S1, and the table information in FIG. Then, a plurality of candidates for the target power generation amount and the correction value for the target power generation amount are acquired, and a plurality of candidates for the target power generation amount corrected based on the correction value are calculated (step S11). After step S3, the vehicle-side ECU 30 selects from a plurality of candidates for the target power generation amount calculated in step S11 based on the fuel consumption amount of the engine 111 acquired in step S3 and the table information in FIG. One target power generation amount is selected (step S12). The target power generation amount selected in step S12 is used as a reference for comparing the power generation amount of the generator 112 in step S5.

  In the process of FIG. 9, when a plurality of candidates for the target power generation amount are calculated in advance and the vehicle-side ECU 30 acquires the fuel consumption amount of the engine 111, the target power generation amount is specified. Therefore, it is not necessary for the vehicle-side ECU 30 to acquire the coolant temperature and / or the control state of the engine 111 and the charge state amount each time the target power generation amount is calculated. Is shortened. The process of FIG. 9 is effective, for example, when the temperature of the cooling water and / or the control state of the engine 111 becomes constant.

  In the above embodiment, the vehicle-side ECU 30 is used as an abnormality diagnosis device for the power generation device 11A, but the power generation device-side ECU 113A may be used as an abnormality diagnosis device for the power generation device 11A. In this case, the table information in FIG. 7 is stored in the ROM 31B of the power generator ECU 113A. Further, the power generation device side ECU 113A acquires the charge state amount of the battery 12 from the charge state amount detection sensor 42 via the vehicle side ECU 30. The power generation device side ECU 113A executes the processing of FIGS.

  In the present embodiment, the vehicle-side ECU 30 performs an abnormality diagnosis process for the power generator 11A by comparing the actual power generation amount (electric power) of the generator 112 with the target power generation amount (electric power). The abnormality diagnosis process of the power generator 11A may be performed by comparing the current value generated by the generator 112 with the target current value or comparing the voltage value generated by the generator 112 with the target voltage value. As described above, the vehicle-side ECU 30 determines the reference value (target power generation amount, power generation state of the power generation device 11A (the power, current, or voltage generated by the generator 112) and the abnormality of the power generation state of the power generation device 11A). The abnormality diagnosis process of the power generator 11A is performed by comparison with the target current value or target voltage value.

FIG. 10 is table information in which the fuel consumption amount of the engine 111, the CO ₂ (carbon dioxide) emission amount of the engine 111, and the legal limit values of the CO ₂ emission amount are associated with each other. The table information (second table information) in FIG. 10 is stored in the ROM 31B of the vehicle ECU 30 or the ROM 31B of the power generator ECU 113A. When the table information in FIG. 10 is stored in the vehicle-side ECU 30, the vehicle-side ECU 30 acquires information on the actual fuel consumption from the power generation device 11A, the acquired fuel consumption information, and the table in FIG. Based on the information, the actual CO ₂ emission amount can be specified, and it can be diagnosed whether the CO ₂ emission amount from the engine 111 exceeds the legal limit value. When the table information of FIG. 10 is stored in the power generator ECU 113A, the power generator ECU 113A determines the actual CO ₂ emission amount based on the actual fuel consumption information and the table information of FIG. It is possible to determine whether or not the CO ₂ emission amount from the engine 111 exceeds the legal limit value. Note that the fuel consumption values (C1, C2) and the CO ₂ emission values (K1, K2) in FIG. 10 are values determined according to the type and performance of the power generator 11A. Further, the legal limit value of the CO ₂ emission amount in FIG. 10 is a value determined by the law.

The timing for diagnosing whether or not the CO ₂ emission amount exceeds the legal limit value is after the vehicle-side ECU 30 or the power generation device-side ECU 113A acquires the fuel consumption information of the engine 111. For example, the vehicle-side ECU 30 or the power generation device-side ECU 113A performs the diagnosis of whether or not the CO ₂ emission amount exceeds the legal limit value simultaneously with the diagnosis of whether or not the generator is abnormal (step S5 in FIG. 8 or FIG. 9). May be executed. As a result, the vehicle-side ECU 30 or the power generation device-side ECU 113A can simultaneously execute the diagnosis of whether or not the generator is abnormal and the diagnosis of whether or not the CO ₂ emission amount exceeds the legal limit value, and the diagnosis time can be reduced. Overall shortening is possible.

  As described above, according to the present embodiment, the vehicle-side ECU 30 changes the target power generation amount according to the operating state of the power generation device 11A, and uses this target power generation amount and the actual power generation amount of the power generation device 11A. Then, since the diagnosis of the presence / absence of the abnormality of the power generation apparatus 11A is performed, the accuracy of diagnosis of the abnormality of the power generation apparatus can be improved as compared with the conventional case. The operating state of the power generator 11A is at least one of the temperature of the cooling water in the engine 111, the control state of the engine 111, or the fuel consumption of the engine 111. Moreover, since the diagnosis of the presence or absence of abnormality of the generator 112 is executed using information separately managed by the detachable power generator 11A and the electrically driven vehicle 1A, the type and performance of the power generator 11A It is possible to diagnose the presence or absence of abnormality of the generator 112 according to the above.

  The embodiment described above is a preferred embodiment of the present invention. However, the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention.

1A Electric drive type vehicle 11A Power generation device 12 Battery 30 Vehicle side ECU
31 Microcomputer 32 Input / Output Circuit 42 Charging State Quantity Detection Sensor 111 Engine 112 Generator 113A Power Generation Device Side ECU
114 Operation switch 115 Water temperature measurement unit 116 Fuel consumption measurement unit 117 Rotational speed measurement unit 118 Power generation amount measurement unit

Claims (6)

A reference value for diagnosing an abnormality in the power generation state of the power generation device, which varies depending on the operation state of the power generation device including the engine and the power generator generated by the engine, and is assumed by the operation state of the engine. Calculate a reference value that is the target power generation state of the generator ,
Comparing the target power generation state of the generator with the actual power generation state of the generator, the control means for diagnosing the presence or absence of abnormality of the power generation device ,
The power generation device is a portable power generation device that charges a battery mounted on an electrically driven vehicle, and includes a first management unit that manages an operating state of the engine and a power generation amount of the generator,
The electrically driven vehicle includes second management means for managing a charge state amount of the battery,
One of the first management means and the second management means is:
First table information associating the operating state of the engine, the state of charge of the battery, and the target power generation amount of the generator;
The control means,
The control means acquires information managed by the other of the first management means and the second management means, and based on the first table information, the operating state of the engine, and the state of charge of the battery Calculating the target power generation amount of the generator, and comparing the power generation amount of the generator with the calculated target power generation amount of the generator, thereby diagnosing the presence or absence of abnormality of the generator , An abnormality diagnosis device for a power generator. In the first table information, an operation state of the engine, a state of charge of the battery, a target power generation amount of the generator, and a correction value for correcting the target power generation amount of the generator are associated.
The control means acquires the target power generation amount and the correction value of the generator based on the first table information, the engine operating state, and the state of charge of the battery, and corrects based on the correction value by calculating the target power generation amount, by comparing the power generation amount and the corrected target power generation amount of the generator, according to claim 1, characterized in that detects the presence of said generator abnormal Abnormality diagnosis device for power generators. The first management means further manages the fuel consumption of the engine,
In the first table information, the engine operating state, the state of charge of the battery, the fuel consumption of the engine, the target power generation amount of the generator, and the correction value for correcting the target power generation amount of the generator are associated. And
The control means obtains information managed by the other of the first management means and the second management means, the first table information, the operating state of the engine, the fuel consumption of the engine, and the battery Based on the state of charge of the generator, the target power generation amount of the generator is calculated, and by comparing the power generation amount of the generator with the calculated target power generation amount of the generator, whether there is an abnormality in the generator The abnormality diagnosis device for a power generation device according to claim 1 , wherein The control means acquires the target power generation amount and the correction value of the generator based on the first table information, the engine operating state, the fuel consumption of the engine, and the charge state amount of the battery, A target power generation amount corrected based on the correction value is calculated, and the power generation amount of the generator is compared with the corrected target power generation amount, thereby diagnosing whether there is an abnormality in the generator. The abnormality diagnosis device for a power generator according to claim 3 . One of the first management means and the second management means is second table information in which the fuel consumption of the engine, the CO2 emission of the engine, and the legal limit value of the CO2 emission are associated with each other. And the control means diagnoses whether or not the CO2 emission amount of the engine exceeds the legal limit value based on the actual fuel consumption of the engine and the second table information. The abnormality diagnosis device for a power generation device according to claim 3 or 4 . An electrically driven vehicle comprising the abnormality diagnosis device for a power generator according to any one of claims 1 to 5 .

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