Estimation system

Abstract

This system provides an estimation method that can improve the accuracy of estimating the power consumption of ePTOs. [Solution] The estimation system comprises an acquisition unit that acquires first information regarding the amount of work done by a first PTO driven by the output of the internal combustion engine when the first PTO is in operation, and an estimation unit that estimates the amount of power consumed by the second PTO when the first PTO is replaced by the second PTO, based on the acquired first information and second information regarding the power efficiency of the second PTO driven by electric power.

Description

Technical Field

[0001] The present disclosure relates to an estimation system.

Background Art

[0002] In recent years, the demand for replacement from internal combustion engine vehicles, which are vehicles driven by internal combustion engines such as diesel engines, to electric motor vehicles, which are vehicles driven by electric motors, has been increasing.

[0003] For example, Patent Document 1 describes a system for calculating the amount of electric power required for an electric motor vehicle to travel based on the output of an internal combustion engine required for an internal combustion engine vehicle to travel.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, the demand for replacement from internal combustion engine vehicles to electric motor vehicles is also increasing in special vehicles such as garbage trucks and aerial work vehicles, in addition to cargo vehicles.

[0006] When replacing from an internal combustion engine vehicle to an electric motor vehicle for the vehicle operation assumed by the user, it is necessary to determine whether it is possible to establish the vehicle operation without causing a power outage. For this purpose, electricity cost information is required. To estimate the electricity cost, it is necessary to estimate the power consumption of each device mounted on the vehicle.

[0007] When a special-purpose vehicle is replaced from an internal combustion engine vehicle to an electric motor vehicle, the vehicle is equipped with an electric power take-off (ePTO). If the estimation of the ePTO's power consumption is based on empirical data that takes into account past driving performance data of electric motor vehicles, there is a problem in that it becomes difficult to improve the accuracy of the power consumption estimation.

[0008] The purpose of this disclosure is to provide an estimation system that can improve the accuracy of estimating the power consumption of an ePTO. [Means for solving the problem]

[0009] To achieve the above objectives, the estimation system in this disclosure is: An acquisition unit that acquires first information regarding the amount of work done by the internal combustion engine when the first PTO, which is driven by the output of the internal combustion engine, is in operation, An estimation unit that estimates the power consumption of the second PTO when the first PTO is replaced with the second PTO, based on the acquired first information and second information regarding the power efficiency of the second PTO driven by electricity, It is equipped with. [Effects of the Invention]

[0010] According to this disclosure, the accuracy of estimating the power consumption of ePTO can be improved. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 is a block diagram schematically showing the functional configuration of the estimation system in the embodiment of this disclosure. [Figure 2] Figure 2 shows a map created from time-frequency data. [Modes for carrying out the invention]

[0012] The embodiments of this disclosure will be described below with reference to the drawings.

[0013] Figure 1 is a block diagram schematically showing the functional configuration of the estimation system in the embodiment of this disclosure. As shown in Figure 1, the estimation system in this embodiment has a server 1a. In Figure 1, the arrows indicate the main data flow, and there may be data flows not shown in Figure 1. In Figure 1, each functional block shows a functional unit configuration, not a hardware (device) unit configuration. Therefore, the functional blocks shown in Figure 1 may be implemented in a single device, or they may be implemented separately in multiple devices. Data exchange between functional blocks may be performed via any means, such as a data bus or a communication network.

[0014] The estimation system in the embodiments of this disclosure estimates the power consumption of an ePTO when a power take-off (PTO) driven by the output of a diesel engine is replaced with a power take-off (ePTO) driven by the power of an electric motor. The diesel engine corresponds to the "internal combustion engine" in this disclosure. The PTO driven by the output of a diesel engine corresponds to the "first PTO" in this disclosure. The ePTO corresponds to the "second PTO" in this disclosure. In the following description, a diesel vehicle (DIE vehicle) driven by a diesel engine is referred to as the "first vehicle." An EV (Electric Vehicle) driven by an electric motor is referred to as the "second vehicle." Note that the first vehicle is not limited to a vehicle equipped with a diesel engine, but may also be a vehicle equipped with an engine that runs on gasoline as fuel. The second vehicle is equipped with a battery that supplies power to the electric motor.

[0015] The first vehicle has one or more sensors (not shown) and one or more measuring instruments (not shown). The sensors and measuring instruments in the first vehicle are those that have been conventionally installed in the first vehicle and are installed for the purpose of creating a map (described later).

[0016] Server 1a has a control unit 1. The control unit 1 comprises a storage unit 2 and a control unit 3. Server 1a also has a communication unit 4.

[0017] The communication unit 4 transmits and receives data with the first vehicle. Detection data, which shows the detection results detected by the sensors, and measurement data, which shows the measurement results measured by the measuring instruments, are transmitted from the first vehicle to the communication unit 4 at predetermined time intervals. The detection data and measurement data transmitted from the first vehicle include first information regarding the amount of work done by the diesel engine (internal combustion engine) when the first PTO, which is driven by the output of the diesel engine, is in operation. The first information includes information indicating that the first PTO is in operation, and time frequency data of the engine speed and torque value of the diesel engine (internal combustion engine). The information indicating that the first PTO is in operation includes, for example, information indicating that the start switch of the first PTO is turned ON.

[0018] Reference data is transmitted to the communication unit 4 from the second vehicle. The reference data includes second information regarding the power efficiency of the electric-driven ePTO (second PTO). Here, the second information refers to the power efficiency, which is a value obtained by dividing the output power of the electric motor by the input power.

[0019] The memory unit 2 is a storage device such as a ROM (Read Only Memory) that stores the BIOS (Basic Input Output System) of the computer that implements the control device 1, a RAM (Random Access Memory) that serves as the working area of ​​the control device 1, and an HDD (Hard Disk Drive) or SSD (Solid State Drive) that stores the OS (Operating System), application programs, various information referenced when the application programs are executed, and maps.

[0020] The control unit 3 is a processor such as the CPU (Central Processing Unit) or GPU (Graphics Processing Unit) of the control device 1, and functions as an acquisition unit 30 and an estimation unit 31 by executing the program stored in the storage unit 2.

[0021] Note that FIG. 1 shows an example in the case where the control device 1 is composed of a single device. However, the control device 1 may be realized by, for example, computing resources such as a plurality of processors and memories. In this case, each part constituting the control unit 3 is realized by at least one of the plurality of different processors executing a program.

[0022] The acquisition unit 30 acquires time-frequency data (first information) from the communication unit 4. A map is created from the time-frequency data acquired by the acquisition unit 30. The map has a horizontal axis representing the engine speed and a vertical axis representing the torque value. The time-frequency data is recorded (plotted) on a map consisting of two vertical and horizontal axes.

[0023] The control unit 3 executes control to record (plot) the operating time of the first PTO in the time-frequency data acquired by the acquisition unit 30 at the position corresponding to the engine speed and torque value in the map. The recorded torque value is recorded as a torque value obtained by reducing a predetermined engine friction loss in the diesel engine.

[0024] A recording example of the time-frequency data will be described below with reference to FIG. 2. FIG. 2 is a diagram showing a map created from the time-frequency data. As shown in FIG. 2, the horizontal axis of the map indicates the engine speed (rpm). The vertical axis of the map indicates the torque value (%). Note that "*****" represents a concealed numerical value.

[0025] In the following explanation, we will use as an example the case where the acquired time frequency data shows an engine speed of 2400-2500 rpm, a torque value of 70-75%, and the operating time of the first PTO is 646 seconds.

[0026] The control unit 3 calculates the median engine speed from the acquired time-frequency data. The control unit 3 determines 2450 (rpm) as the median engine speed. The control unit 3 also determines 72.5 (%) as the median torque value. Then, the control unit 3 executes control to record the operating time of the first PTO, 646 (sec), at the position on the map corresponding to the engine speed (2400~2500 rpm) and torque value (70~75%). The position where the operating time of the first PTO (646 sec) is recorded is indicated by a thick line frame in Figure 2. The amount of work in the thick line frame shown in Figure 2 is the amount of work of the first PTO.

[0027] The work output (kWh) of the first PTO is calculated by the following formula (1).

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[0028] (Estimation part 31) The estimation unit 31 calculates the power consumption of the ePTO (second PTO) based on the calculated amount of work and the power efficiency of the ePTO. The power consumption (kWh) of the ePTO is calculated using the following formula (2).

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[0029] The estimation unit 31 performs the calculations using equations (1) and (2) above for all time-frequency data (operating time of the first PTO) recorded in the map, and estimates the power consumption of the ePTO when the first PTO is replaced with the ePTO by integrating all the calculated values.

[0030] The estimation system 100 in the above embodiment includes an acquisition unit 30 that acquires first information regarding the amount of work done by the diesel engine when the first PTO, which is driven by the output of the diesel engine, is in operation, and an estimation unit 31 that estimates the amount of power consumed by the ePTO when the first PTO is replaced with the ePTO, based on the acquired first information and second information regarding the power efficiency of the ePTO, which is driven by electric power.

[0031] According to the above configuration, it becomes possible to replace the amount of work done by the diesel engine when driving the first PTO with the amount of electricity when driving the ePTO, and furthermore, it becomes possible to multiply that amount of electricity by the power efficiency of the ePTO. This makes it possible to improve the accuracy of estimating the power consumption of the ePTO when the first PTO is replaced with an ePTO.

[0032] Furthermore, in the estimation system 100 of the above embodiment, the torque value is a torque value with a predetermined friction loss in the diesel engine reduced. As a result, the power consumption of the ePTO is estimated based on the torque value with reduced friction loss, making it possible to further improve the accuracy of the estimation of the power consumption of the ePTO.

[0033] Furthermore, in the estimation system 100 of the above embodiment, the friction loss includes a predetermined amount of friction loss due to the aging deterioration of the diesel engine. Since the ePTO power consumption is estimated taking into account the aging deterioration of the diesel engine, it is possible to further improve the accuracy of the ePTO power consumption estimation.

[0034] Furthermore, the estimation system 100 in the above embodiment further includes a map having a horizontal axis representing engine speed and a vertical axis representing torque value in a diesel engine, and a control unit 3 that performs control to record the operating time of the first PTO in the time frequency data acquired by the acquisition unit 30 at positions on the map corresponding to the engine speed and torque value. This makes it possible to collect the acquired operating time of the first PTO without omission on a map consisting of two axes, vertical and horizontal.

[0035] Furthermore, in the estimation system 100 of the above embodiment, the estimation unit 31 calculates the amount of work done by the diesel engine based on the operating time of the first PTO recorded in the map, and estimates the amount of power consumed by the ePTO based on the calculated amount of work done. This makes it possible to replace the amount of work done by the diesel engine when the first PTO is driven by the output of the diesel engine with the amount of power consumed by the ePTO, thereby improving the accuracy of the estimation of the power consumed by the ePTO.

[0036] In the estimation system 100 of the above embodiment, the acquisition unit 30 may acquire third information related to the driving of the vehicle from the internal combustion engine vehicle, and the estimation unit 31 may estimate the amount of power consumed for driving the electric motor vehicle with ePTO based on the third information. This makes it possible to estimate not only the power consumption of the ePTO but also the power consumption of the entire electric motor vehicle.

[0037] Furthermore, the embodiments described above are merely examples of how the Disclosure may be implemented, and the technical scope of the Disclosure should not be limited by them. In other words, the Disclosure can be implemented in various ways without departing from its essence or its main features. [Industrial applicability]

[0038] This disclosure is particularly useful for lease management systems equipped with estimation systems that require improved accuracy in estimating the power consumption of ePTOs. [Explanation of Symbols]

[0039] 1 Control device 1a Server 2 Storage section 3. Control Unit 4. Communications Department 30 Acquisition Department 31 Estimation part 100 Estimation Systems

Claims

1. An acquisition unit that acquires first information regarding the amount of work done by the internal combustion engine when the first PTO, which is driven by the output of the internal combustion engine, is in operation, An estimation unit that estimates the amount of power consumed by the second PTO when the first PTO is replaced with the second PTO, based on the acquired first information and second information regarding the power efficiency of the second PTO driven by electricity, Equipped with, Estimation system.

2. The first information includes time-frequency data of engine speed and torque value in the internal combustion engine. The estimation system according to claim 1.

3. The acquisition unit acquires the time-frequency data as first information from the first vehicle having the first PTO. The estimation system according to claim 2.

4. The torque value is a torque value obtained by reducing a predetermined amount of friction loss in the internal combustion engine. The estimation system according to claim 3.

5. The aforementioned friction loss includes a predetermined amount of friction loss due to the aging deterioration of the internal combustion engine. The estimation system according to claim 4.

6. A map having a first axis representing engine speed and a second axis representing torque value, A control unit that performs control to record the operating time of the first PTO in the time frequency data acquired by the acquisition unit at a position corresponding to the engine speed and torque value in the map, Furthermore, The estimation system according to claim 3.

7. The estimation unit calculates the amount of work done by the internal combustion engine based on the operating time of the first PTO recorded in the map, and estimates the amount of power consumed by the second PTO based on the calculated amount of work. The estimation system according to claim 6.

8. The acquisition unit acquires third information relating to the driving of the first vehicle from the first vehicle, The estimation unit estimates the amount of power consumed for driving the second vehicle having the second PTO based on the third information. The estimation system according to claim 3.

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