Erroneous fueling suppression method and erroneous fueling suppression device for engine drive type work machine

Abstract

To prevent a fuel from being erroneously fed to an engine drive type work machine, with a simple device configuration.SOLUTION: A fueling estimation fuel is input by input means 11 before starting a newly fueling operation to make fueling estimation fuel information acquisition means 21 acquire oil type identification information of the fueling estimation fuel, while predetermined information enabling identification of an oil type of fuel belonging to a fuel group capable of feeding oil to an engine drive type work machine 1 is defined as the oil type identification information. On the other hand, the oil type identification information of previously fed fuel, supplied during fueling last time, is acquired by previously fed fuel information acquisition means 22; whether or not the oil type of the fueling estimation fuel is identical to the oil type of previously fed fuel is determined by comparing the oil type identification information of the fueling estimation fuel with the oil type identification information of previously fed fuel by comparison means 23; and in cases where both of the foregoing oil types are not identical to each other, erroneous fueling is prevented from being generated by operation control means 24 causing notification means 31 to issue a warning alarm, and / or causing a locking mechanism 32 to lock a fueling window 7.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method and device for suppressing erroneous fueling of an engine-driven working machine, and more specifically, to a method for suppressing the refueling of an engine-driven working machine with a type of fuel different from the fuel already supplied thereto (referred to as "erroneous fueling" in this invention), and a device for suppressing the occurrence of such erroneous fueling. [Background technology]

[0002] As society becomes more concerned about environmental issues, the demand for decarbonization is also growing in the civil engineering and construction industries, and there is a demand to reduce carbon dioxide emissions from engine-driven work machines such as engine-driven generators and engine-driven compressors, which are often used in the civil engineering and construction industries.

[0003] In response to these demands, there is a social demand for the fuel used in engine-driven work machinery to be switched from diesel to alternative fuels that emit less carbon dioxide than diesel, such as B5 diesel, which is diesel with 5% or less biodiesel fuel added, B100 fuel, which is 100% biodiesel fuel, RD fuel (renewable diesel fuel), which is biodiesel fuel made from waste cooking oil, and GTL fuel, which is fuel refined from natural gas.

[0004] On the other hand, biodiesel fuel and GTL fuel are expensive and can be difficult to obtain in some areas, so there are still many situations in which diesel fuel has to be used.As a result, the same fuel is not always used for a single engine-driven work machine. Rather, any one of diesel fuels or diesel alternative fuels may be selected for use in the fuel, taking into consideration various factors such as economic efficiency, the difficulty of obtaining biofuels at the site where the engine-driven work machine is installed, and the owner's requests.

[0005] Here, under the Local Tax Act, B5 diesel, which is treated as diesel or light oil, is subject to diesel transaction tax, but B100 fuel and GTL fuel are not subject to taxation.

[0006] On the other hand, mixed fuels produced by mixing diesel or B5 diesel with B100 fuel or GTL fuel are also subject to diesel transaction tax if they fall under the category of "diesel" under the Local Tax Act.

[0007] Therefore, for example, if B100 fuel or GTL fuel is mistakenly filled with diesel or B5 diesel remaining in a fuel tank, or if diesel or B5 diesel is mistakenly filled with B100 fuel or GTL fuel remaining in a fuel tank, causing these fuels to mix in the fuel tank and produce a mixed fuel that corresponds to "diesel" under the Local Tax Act, the "consumption" of the mixed fuel produced in this way is subject to the diesel transaction tax stipulated in the Local Tax Act (Article 144-3, item 5 of the Local Tax Act), and therefore the "consumption" of the aforementioned mixed fuel that is carried out without paying the diesel transaction tax is illegal.

[0008] Therefore, if diesel or B5 diesel mixes with B100 fuel or GTL fuel in a fuel tank due to incorrect refueling, producing a mixed fuel, the mixed fuel cannot be used and must be disposed of, resulting in waste.

[0009] In addition, disposing of mixed fuel caused by mis-fueling requires complicated work such as draining the mixed fuel from the fuel supply system of the engine-driven work machine, and the engine-driven work machine must be stopped from the time the mixed fuel is drained until refueling is completed, so mis-fueling can also lead to delays in construction schedules.

[0010] Therefore, there is a need to prevent such accidents from occurring in advance.

[0011] Patent Document 1, cited below, proposes a system for preventing erroneous refueling. This system is not installed on the engine-driven work machine side, i.e., the side to be refueled, but on the refueling side, such as a refueling device at a gas station. However, this system stores a matching ID that identifies a vehicle and an oil type ID that identifies the type of fuel previously refueled, and sounds an alarm when the fuel type in the refueling device's refueling nozzle differs from the type of fuel previously refueled, thereby preventing erroneous refueling. [Prior art documents] [Patent documents]

[0012] [Patent Document 1] JP 2005-153947 A Summary of the Invention [Problem to be solved by the invention]

[0013] By installing the mis-fueling prevention system described in Patent Document 1 above in the fuel supply equipment at a gas station, it is possible to prevent the occurrence of mis-fueling of vehicles that are able to drive themselves to the gas station and receive fuel.

[0014] However, fueling of engine-driven work machines installed and used at civil engineering or construction sites, etc., is carried out at the civil engineering or construction site where the engine-driven work machines are installed, and the occurrence of erroneous fueling of engine-driven work machines cannot be prevented by installing an erroneous fueling prevention system in a gas station's refueling equipment, such as the erroneous fueling prevention system described in Patent Document 1.

[0015] Moreover, refueling of vehicles is often performed by the driver of the vehicle or other person who manages the vehicle and is familiar with the vehicle's usage, making it difficult for incorrect refueling to occur. However, refueling of engine-driven work machinery can be performed by people who do not understand the usage of engine-driven work machinery, such as delivery personnel from a fuel delivery company that is entrusted with delivering fuel to civil engineering and construction sites. In particular, with engine-driven work machinery equipped with diesel engines, the types of fuel that can be refueled are diverse, such as diesel, B5 diesel, B100 fuel, RD fuel, and GTL fuel, making incorrect refueling more likely to occur.

[0016] In addition, in order to prevent erroneous fuel supply to engine-driven work machines, it is also possible to install the erroneous fuel supply prevention system described in Patent Document 1 above, which is installed on the fuel supply device at gas stations, on the engine-driven work machines.

[0017] However, adopting a configuration in which an engine-driven working machine is equipped with a complex and large-scale system for preventing mis-fueling, as described in Patent Document 1, increases the price of the engine-driven working machine, causing it to lose its price competitiveness in the market.

[0018] For this reason, it is not possible to adopt a complex mis-fueling prevention system such as that described in the above-mentioned Patent Document 1 as it is in engine-driven work machines, and there is a demand for a method and device for preventing mis-fueling using a simpler method and with a simpler device configuration that can prevent the occurrence of mis-fueling on the engine-driven work machine side, which is the side that is being fueled.

[0019] In view of the above, the present invention aims to provide a method and device for preventing mis-fueling in an engine-driven work machine, which can prevent the occurrence of mis-fueling in a relatively easy manner and with a relatively simple device configuration, and therefore can be adopted as a configuration for the engine-driven work machine, which is the side to be fueled. [Means for solving the problem]

[0020] The means for solving the problems are described below together with the reference numerals used in the description of the embodiment of the invention. These reference numerals are described in order to clarify the correspondence between the description of the claims and the description of the embodiment of the invention, and needless to say, are not used to restrict the interpretation of the technical scope of the present invention.

[0021] In order to achieve the above object, the method for suppressing erroneous fuel supply to an engine-driven work machine of the present invention comprises the steps of: In an engine-driven work machine 1 equipped with a diesel engine and using one type of fuel selected from a fuel group consisting of diesel and diesel alternative fuel, Predetermined information that enables identification of the oil type of the fuel belonging to the fuel group is defined as oil type identification information, Before starting a new refueling operation, An input process for inputting the fuel to be refueled when refueling for the first time; A fuel refueling schedule information acquisition process for acquiring oil type identification information of the fuel to be refueled input in the input process; A fuel-supplied fuel information acquisition process for acquiring fuel type identification information of the fuel that was supplied to the engine-driven working machine 1 at the time of the previous refueling; a comparison process for comparing the oil type identification information of the fuel to be refueled, acquired in the process for acquiring fuel information to be refueled, with the oil type identification information of the fuel already refueled, acquired in the process for acquiring fuel information to be refueled, and determining that the oil type of the fuel to be refueled and the oil type of the fuel already refueled match when the oil type identification information of the fuel to be refueled and the oil type identification information of the fuel already refueled correspond to each other, and determining that the oil type of the fuel to be refueled and the oil type of the fuel already refueled do not match when the oil type identification information of the fuel to be refueled and the oil type identification information of the fuel already refueled do not correspond to each other; When the comparison process determines that the type of fuel to be refueled does not match the type of fuel that has already been refueled, an operation control process is executed to cause the engine-driven work machine 1 to perform a predetermined refueling suppression operation (Claim 1).

[0022] The fuel supply suppression operation performed by the engine-driven working machine 1 in the operation control process is A warning is issued by a notification means 31 (display device 31a, alarm 31b, etc.) provided in the engine-driven working machine 1, and / or The inability to open the opening / closing door 8 provided on the fuel filler window 7 for accessing the fuel filler port of the fuel tank of the engine-driven working machine 1, This can be done (Claim 2).

[0023] The above-described method for suppressing erroneous fuel supply includes the following steps: The fuel input as the fuel to be refueled in the input process at the time of the previous refueling is stored in the storage means 25 as the fuel already refueled, In the fuel information acquisition process for refueling, the fuel type identification information of the fuel to be refueled input in the input process is acquired when refueling a new fuel, In the refueled fuel information acquisition process, the oil type identification information of the refueled fuel stored in the storage means 25 is acquired, In the comparison process, The fuel type identification information of the fuel to be refueled, which is acquired by the fuel information acquisition process and input by the input process when refueling a new fuel, This may be achieved by comparing the fuel type identification information acquired in the refueled fuel information acquisition process with the fuel type identification information input in the input process at the time of the previous refueling (Claim 3; see Figures 1 and 2).

[0024] The mis-fueling prevention method of the present invention is, instead of the above configuration, The range of the predetermined characteristic value of each of the fuels belonging to the fuel group is stored in a storage means 25 as a fuel characteristic reference range (Ymin to Ymax), In the fuel information acquisition process for refueling, the fuel characteristic standard range (Ymin to Ymax) corresponding to the fuel input as the fuel to be refueled in the input process at the time of new refueling is acquired as the oil type identification information of the fuel to be refueled, among the fuel characteristic standard range (Ymin to Ymax) stored in the storage means 25, and In the fuel supply information acquisition process, a fuel property detection value Y, which is a detection value of a predetermined property of the fuel in the fuel supply system detected at any position in the fuel supply system of the engine-driven work machine, is acquired as oil type identification information of the fuel after refueling. In the comparison process, the fuel property detection value Y of the fuel after refueling acquired in the fuel supply information acquisition process is compared with the fuel property reference range (Ymin to Ymax) of the fuel scheduled for refueling acquired in the fuel supply scheduled fuel information acquisition process. When the fuel property detection value Y of the fuel after refueling is within the range of the fuel property reference range (Ymin to Ymax) of the fuel scheduled for refueling (Ymin ≤ Y ≤ Ymax), it is determined that the oil type of the fuel scheduled for refueling matches the oil type of the fuel after refueling. When the fuel property detection value Y of the fuel after refueling is outside the range of the fuel property reference range (Ymin to Ymax) of the fuel scheduled for refueling (Ymin > Y or Ymax < Y), it may be determined by determining that the oil type of the fuel scheduled for refueling does not match the oil type of the fuel after refueling (Claim 4; see FIGS. 3 to 5).

[0025] The misfueling prevention method of the present invention further Stores the fuel input as the fuel scheduled for refueling in the input process at the time of the previous refueling as the fuel after refueling in the storage means 25, and stores the range of each predetermined property value of the fuel belonging to the fuel group as the fuel property reference range (Ymin to Ymax) in the storage means 25. A fuel property detection sensor 41 for detecting a predetermined property of the fuel is provided at any position (the fuel tank in the embodiment) in the fuel supply system of the engine-driven work machine 1. An execution determination reference switching process is performed to switch the oil type identification information used for comparing the oil type of the fuel scheduled for refueling and the oil type of the fuel after refueling according to whether the fuel property detection sensor 41 is detecting the property of the fuel. By this determination reference switching process, When the fuel property detection sensor 41 is not detecting the property of the fuel, In the fuel supply scheduled fuel information acquisition process, the oil type identification information of the fuel scheduled for refueling input in the input process at the time of new refueling is acquired. In the fuel supply-completed fuel information acquisition process, acquire the fuel type identification information of the fuel for which fuel supply has been completed and stored in the storage means 25, In the comparison process, Compare the fuel type identification information of the fuel scheduled for supply, which was input in the input process at the time of new fuel supply and acquired in the fuel supply-scheduled fuel information acquisition process, with the fuel type identification information of the fuel that was input in the input process at the time of the previous fuel supply and acquired in the fuel supply-completed fuel information acquisition process, When the fuel characteristic detection sensor 41 is detecting the characteristics of the fuel, In the fuel supply-scheduled fuel information acquisition process, among the fuel characteristic reference ranges (Ymin to Ymax) stored in the storage means 25, acquire the fuel characteristic reference range (Ymin to Ymax) corresponding to the fuel input as the fuel scheduled for supply in the input process at the time of new fuel supply as the fuel type identification information of the fuel scheduled for supply. At the same time, In the fuel supply-completed fuel information acquisition process, acquire the fuel characteristic detection value Y, which is the detection value of the predetermined characteristics of the fuel in the fuel supply system detected by the fuel characteristic detection sensor 41, as the fuel type identification information of the fuel for which fuel supply has been completed, In the comparison process, compare the fuel characteristic detection value Y of the fuel for which fuel supply has been completed, acquired in the fuel supply-completed fuel information acquisition process, with the fuel characteristic reference range (Ymin to Ymax) of the fuel scheduled for supply, acquired in the fuel supply-scheduled fuel information acquisition process. When the fuel characteristic detection value Y of the fuel for which fuel supply has been completed is within the range of the fuel characteristic reference range (Ymin to Ymax) of the fuel scheduled for supply (Ymin ≤ Y ≤ Ymax), determine that the fuel type of the fuel scheduled for supply and the fuel type of the fuel for which fuel supply has been completed match. At the same time, when the fuel characteristic detection value Y of the fuel for which fuel supply has been completed is outside the range of the fuel characteristic reference range (Ymin to Ymax) of the fuel scheduled for supply (Ymin > Y or Ymax < Y), determine that the fuel type of the fuel scheduled for supply and the fuel type of the fuel for which fuel supply has been completed do not match. It may be configured as described above (see Claim 5; FIGS. 6 and 7).

[0026] Also, the misfueling prevention device 10 in the engine-driven work machine of the present invention, In an engine-driven work machine 1 equipped with a diesel engine and using one type of fuel selected from a fuel group consisting of diesel and diesel alternative fuel, Predetermined information that enables identification of the oil type of the fuel belonging to the fuel group is defined as oil type identification information, An input means 11 for inputting the fuel to be refueled at the time of new refueling before starting new refueling work; A fuel supply schedule information acquisition means 21 for acquiring the oil type identification information of the fuel to be refueled input by the input means 11; A fuel-supplied fuel information acquisition means 22 that acquires fuel type identification information of the fuel that was supplied to the engine-driven working machine 1 at the time of the previous refueling; a comparison means 23 for comparing the oil type identification information of the fuel to be refueled acquired by the fuel information acquisition means 21 with the oil type identification information of the fuel already refueled acquired by the fuel information acquisition means 22, and determining that the oil type of the fuel to be refueled and the oil type of the fuel already refueled match when the oil type identification information of the fuel to be refueled and the oil type identification information of the fuel already refueled correspond to each other, and determining that the oil type of the fuel to be refueled and the oil type of the fuel already refueled do not match when the oil type identification information of the fuel to be refueled and the oil type identification information of the fuel already refueled do not correspond to each other; The present invention is characterized in that it is provided with an operation control means 24 that causes the engine-driven working machine 1 to perform a predetermined refueling suppression operation when the comparison means 23 determines that the oil type of the fuel to be refueled does not match the oil type of the fuel that has already been refueled (Claim 6).

[0027] The fuel supply suppression operation that the operation control means 24 causes the engine-driven working machine 1 to perform is as follows: A warning is issued by a notification means 31 (display device 31a, alarm 31b, etc.) provided in the engine-driven working machine 1, and / or The inability to open the opening / closing door 8 provided on the fuel filler window 7 for accessing the fuel filler port of the fuel tank of the engine-driven working machine 1, It is possible to do so (Claim 7).

[0028] In the mis-fueling suppression device 10 having the above configuration, A storage means 25 is provided for storing the fuel input as the fuel to be refueled in the input process at the time of the previous refueling as the fuel already refueled, The fuel information acquisition means 21 acquires the oil type identification information of the fuel to be refueled inputted by the input means 11 at the time of new refueling, The refueled fuel information acquisition means 22 acquires the oil type identification information of the refueled fuel stored in the storage means 25, The comparison means 23 The fuel type identification information of the fuel to be refueled, which is acquired by the fuel information acquisition means 21 and input by the input means 11 at the time of new refueling, It is also possible to compare the fuel type identification information acquired by the refueled fuel information acquisition means 22 with the information input by the input means 11 at the time of the previous refueling (claim 8; see Figures 1 and 2).

[0029] The mis-fueling prevention device 10 of the present invention has the following configuration instead of the above configuration: providing a storage means 25 for storing a range of predetermined characteristic values ​​of each of the fuels belonging to the fuel group as a fuel characteristic reference range (Ymin to Ymax); The fuel information acquisition means 21 acquires, from among the fuel characteristic standard ranges (Ymin to Ymax) stored in the storage means 25, the fuel characteristic standard range (Ymin to Ymax) corresponding to the fuel inputted as the fuel to be refueled by the input means 11 at the time of new refueling, as oil type identification information of the fuel to be refueled, The fuel-supplied fuel information acquisition means 22 acquires a fuel characteristic detection value Y, which is a detection value for the predetermined characteristic of the fuel in the fuel supply system detected at any position in the fuel supply system of the engine-driven work machine, as fuel type identification information of the fuel-supplied fuel; The comparison means 23 compares the fuel property detection value Y of the fuel after refueling acquired by the refueled fuel information acquisition means 22 with the fuel property reference range (Ymin to Ymax) of the fuel scheduled for refueling acquired by the refueling scheduled fuel information acquisition means 21. When the fuel property detection value Y of the fuel after refueling is within the range of the fuel property reference range (Ymin to Ymax) of the fuel scheduled for refueling (Ymin ≤ Y ≤ Ymax), it is determined that the fuel type of the fuel scheduled for refueling matches the fuel type of the fuel after refueling. When the fuel property detection value Y of the fuel after refueling is outside the range of the fuel property reference range (Ymin to Ymax) of the fuel scheduled for refueling (Ymin > Y or Ymax < Y), it may be configured to determine that the fuel type of the fuel scheduled for refueling does not match the fuel type of the fuel after refueling (Claim 9; see FIGS. 3 to 5).

[0030] The misfueling prevention device 10 of the present invention further stores the fuel input as the fuel scheduled for refueling by the input means 11 at the previous refueling as the fuel after refueling, and provides a storage means 25 for storing the range of each predetermined characteristic value of the fuel belonging to the fuel group as the fuel property reference range (Ymin to Ymax). A fuel property detection sensor 41 for detecting a predetermined property of the fuel is provided at any position (the fuel tank in the embodiment) in the fuel supply system of the engine-driven work machine 1. A determination criterion switching means 26 is further provided for switching the fuel type identification information used for comparing the fuel type of the fuel scheduled for refueling and the fuel type of the fuel after refueling according to whether the fuel property detection sensor 41 is detecting the property of the fuel. The determination criterion switching means 26 when the fuel property detection sensor 41 is not detecting the property of the fuel, the refueling scheduled fuel information acquisition means 21 acquires the fuel type identification information of the fuel scheduled for refueling input in the input means 11 at the time of new refueling, and the refueled fuel information acquisition means 22 acquires the fuel type identification information of the fuel after refueling stored in the storage means 25, and the comparison means 23 The oil type identification information of the fuel scheduled for refueling input by the input means 11 at the time of new refueling, acquired by the fuel scheduled for refueling information acquisition means 21, and, Compare the oil type identification information of the fuel input by the input means 11 at the time of the previous refueling, acquired by the refueled fuel information acquisition means 22, When the fuel characteristic detection sensor 41 is detecting the characteristics of the fuel, The fuel scheduled for refueling information acquisition means 21 obtains, among the fuel characteristic reference ranges (Ymin to Ymax) stored in the storage means 25, the fuel characteristic reference range (Ymin to Ymax) corresponding to the fuel input as the fuel scheduled for refueling in the input process at the time of new refueling, as the oil type identification information of the fuel scheduled for refueling, and, The refueled fuel information acquisition means 22 obtains the fuel characteristic detection value Y, which is the detection value of the predetermined characteristics of the fuel in the fuel supply system detected by the fuel characteristic detection sensor 41, as the oil type identification information of the refueled fuel, The comparison means 23 compares the fuel characteristic detection value Y of the refueled fuel acquired by the refueled fuel information acquisition means 22 with the fuel characteristic reference range (Ymin to Ymax) of the fuel scheduled for refueling acquired by the fuel scheduled for refueling information acquisition means 21, and when the fuel characteristic detection value Y of the refueled fuel is within the range of the fuel characteristic reference range (Ymin to Ymax) of the fuel scheduled for refueling (Ymin ≦ Y ≦ Ymax), it is determined that the oil type of the fuel scheduled for refueling and the oil type of the refueled fuel match, and when the fuel characteristic detection value Y of the refueled fuel is outside the range of the fuel characteristic reference range (Ymin to Ymax) of the fuel scheduled for refueling (Ymin > Y, or Ymax < Y), it is determined that the oil type of the fuel scheduled for refueling and the oil type of the refueled fuel do not match. It may be configured as such (Claim 10; see FIGS. 6 and 7).

Advantages of the Invention

[0031] With the configuration of the present invention described above, the mis-fueling prevention method and mis-fueling prevention device 10 for engine-driven work machines of the present invention can determine when mis-fueling is about to occur, in which a different type of fuel than the fuel already supplied to the engine-driven work machine 1 is being supplied, and take the necessary measures to prevent the mis-fueling, such as alerting the refueling worker by issuing a warning using an alarm means, or making it physically impossible to start refueling by blocking the fuel supply window 7 for accessing the fuel filler port provided on the fuel tank. This not only makes it possible to prevent the occurrence of mis-fueling, but also makes it possible to realize the mis-fueling prevention method and mis-fueling prevention device for preventing such mis-fueling using a relatively simple method and device configuration, and therefore makes it possible to adopt this as a configuration on the engine-driven work machine side rather than on the fuel supply side, thereby making it possible to effectively prevent the occurrence of mis-fueling in engine-driven work machines that are supplied with fuel at civil engineering and construction sites. [Brief description of the drawings]

[0032] [Figure 1] FIG. 2 is a functional block diagram of the mis-fueling prevention device according to the first embodiment. [Diagram 2] FIG. 3 is an operation flow diagram of the mis-fueling prevention device according to the first embodiment. [Diagram 3] FIG. 11 is a functional block diagram of a mis-fueling prevention device according to a second embodiment. [Figure 4] Correlation diagram of fuel temperature - fuel property standard range. [Diagram 5] FIG. 11 is an operation flow diagram of the mis-fueling prevention device according to the second embodiment. [Figure 6] FIG. 11 is a functional block diagram of a mis-fueling prevention device according to a third embodiment. [Figure 7] FIG. 11 is an operation flow diagram of the mis-fueling prevention device according to the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] An example of the configuration of the mis-fueling prevention device 10 for an engine-driven working machine according to the present invention will be described below with reference to the attached drawings.

[0034] [Target engine-driven working machines] The mis-fueling prevention device 10 of the present invention is applicable to various types of engine-driven work machines 1, without any particular limitation, as long as they are equipped with a diesel engine. As examples, engine-driven generators having a generator main body as the work machine main body, engine-driven compressors having a compressor main body, engine-driven pumps having a pump main body, etc. can all be included in the engine-driven work machines 1 to which the mis-fueling prevention device 10 of the present invention is applicable.

[0035] In addition, in engine-driven work machines equipped with diesel engines, both diesel fuel and diesel alternative fuels such as B5 diesel fuel, B100 fuel, GTL fuel, and RD fuel can be used. However, in the following explanation, for the sake of convenience, it will be explained that any one of the three types of fuel, "diesel fuel", "B100 fuel", and "GTL fuel", can be supplied to the engine-driven work machines, and an example will be given in which "diesel fuel", "B100 fuel", and "GTL fuel" are each treated as a single "oil type".

[0036] However, the "oil type" in this invention may also be classified as, for example, a "first oil type" for diesel and diesel alternative fuels that are subject to diesel transaction tax under the Local Tax Act (diesel and B5 diesel) and a "second oil type" for fuels that are not subject to diesel transaction tax (B100 fuel, GTL fuel, RD fuel, etc.), and multiple types of fuel may be treated as a single "oil type." This may constitute the present invention as a means for preventing erroneous fueling between the first oil type (for example, fuel that is subject to diesel transaction tax) and the second oil type (for example, fuel that is exempt from diesel transaction tax).

[0037] [Missupply prevention device (Example 1)] (1) Overall structure FIG. 1 shows an embodiment (first embodiment) of an erroneous fuel supply suppression device 10 for an engine-driven working machine 1 according to the present invention.

[0038] The mis-fueling prevention device 10 shown in Figure 1 is composed of an input means 11, a fuel-fueling prevention means 30, and an electronic control device 20 such as a microcontroller connected to these. Of these, the electronic control device 20 realizes a planned-fuel-fueling information acquisition means 21, an already-fueled fuel information acquisition means 22, a comparison means 23, an operation control means 24, and a memory means 25.

[0039] (2) Input method The aforementioned input means 11 is a means for executing an input process in which a refueling worker inputs the fuel that is about to be refueled as the "fuel to be refueled" before starting refueling when starting a new refueling operation.

[0040] In the embodiment shown in Figure 1, this input means 11 is realized by a touch panel provided on the engine-driven working machine 1, and is configured so that the refueling worker can execute the above-mentioned input processing by selecting the fuel to be refueled from the fuels (diesel, GTL, B100) displayed on the touch panel.

[0041] (3) Means for acquiring information on scheduled refueling The input result of the fuel to be refueled (selection result in the embodiment) made by the refueling worker via the input means 11 is transmitted to a fuel to be refueled information acquisition means 21 realized in the electronic control unit 20 .

[0042] This scheduled refueling fuel information acquisition means 21 executes a scheduled refueling fuel information acquisition process for acquiring predetermined information (oil type identification information) that enables identification of the oil type of the scheduled refueling fuel input by the input means 11.

[0043] The aforementioned oil type identification information is not particularly limited as long as it can identify fuel according to a specified oil type. As an example, the fuel name may be used as the oil type identification information, or an identifier assigned to each type of fuel may be used as the oil type identification information, and further, the numerical values ​​of specified characteristics of each fuel (e.g., ultrasonic propagation speed, electrostatic capacitance, thermal conductivity, etc.) may be used as the oil type identification information.

[0044] In this embodiment, the planned refueling fuel information acquisition means 21 acquires the fuel (fuel name such as "diesel", "B100", "GTL", etc.) input as the planned refueling fuel by the input means 11 as the oil type identification information of the planned refueling fuel described above.

[0045] In place of this configuration, for example, when "diesel" is selected by the input means 11 as the fuel to be refueled, the fuel information acquisition means 21 to be refueled may acquire identification information indicating that the selected fuel is an oil type subject to diesel transaction tax as the aforementioned oil type identification information, and when "GTL" or "B100" is selected, the fuel information acquisition means 21 to be refueled may acquire identification information indicating that the selected fuel is an oil type that is exempt from diesel transaction tax as the aforementioned oil type identification information.

[0046] (4) Means for acquiring refueled fuel information The refueled fuel information acquisition means 22 executes a refueled fuel information acquisition process to acquire oil type identification information of the "refueled fuel", which is the fuel that was refueled to the engine-driven working machine 1 during the previous refueling.

[0047] The oil type identification information acquired by the refueled fuel information acquisition means 22 can be various information that can identify the type of fuel that has been refueled in the engine-driven work machine. For example, a predetermined characteristic value of the fuel detected by a fuel property detection sensor placed in the fuel tank (e.g., ultrasonic propagation velocity, capacitance, thermal conductivity, etc.) can be used as the oil type identification information. However, in this embodiment, the fuel (fuel name) input as the fuel to be refueled via the input means 11 at the time of the previous refueling is stored in the memory means 25 as oil type identification information, and when the fuel to be refueled for new refueling is input via the input means 11, the refueled fuel information acquisition means 22 is configured to be able to acquire the above-mentioned fuel (fuel name) stored in the memory means 25 as the oil type identification information of the fuel that has been refueled.

[0048] In addition, as described above, if the scheduled refueling fuel information acquisition means 21 is configured to acquire as oil type identification information whether or not the newly inputted fuel via the input means 11 is an oil type subject to light oil transaction tax, the refueled fuel information acquisition means 22 may also be configured to acquire as oil type identification information whether or not the fuel stored in the memory means 25 is subject to light oil transaction tax.

[0049] (5) Comparison means The comparison means 23 executes a comparison process in which it compares the oil type identification information of the fuel to be refueled acquired by the fuel to be refueled information acquisition means 21 with the oil type identification information acquired by the fuel already refueled information acquisition means 22, and determines whether the oil type of the fuel to be refueled and the oil type of the fuel already refueled match based on whether they correspond.

[0050] In this embodiment, it is determined whether the oil type identification information acquired by the scheduled refueling fuel information acquisition means 21 (fuel name input by the input means 11 when refueling for the first time) corresponds to the oil type identification information acquired by the already refueled fuel information acquisition means 22 (fuel name entered by the input means 11 at the time of the previous refueling, which is stored in the memory means 25).

[0051] If the oil type identification information acquired by the fuel information acquisition means 21 to be refueled corresponds to the oil type identification information acquired by the fuel information acquisition means 22 that has already been refueled, the comparison means 23 determines that the oil type of the fuel to be refueled matches the oil type of the fuel that has already been refueled, and if the oil type identification information acquired by the fuel information acquisition means 21 to be refueled does not correspond to the oil type identification information acquired by the fuel information acquisition means 22 that has already been refueled, the comparison means 23 determines that the oil type of the fuel to be refueled does not match the oil type of the fuel that has already been refueled.

[0052] In addition, in this embodiment, when the comparison means 23 determines that the oil type of the fuel to be refueled matches the oil type of the fuel that has already been refueled, it is configured to store (including overwrite) the fuel to be refueled inputted via the input means 11 in the storage means as oil type identification information to be acquired by the already refueled fuel information acquisition means 22 at the time of the next refueling, or to perform processing to maintain the oil type identification information that has already been stored.

[0053] Such storage (including overwriting) and maintenance of the memory in the memory means 25 may be performed when the comparison means 23 determines that the oil type of the fuel to be refueled matches the oil type of the fuel that has already been refueled, but in this embodiment, it is configured to be executed as a trigger when a predetermined action indicating that refueling has been completed (as one example, the closing action of the opening and closing door 8 of the refueling window 7) is confirmed.

[0054] In this embodiment, the fuel to be refueled input via the input means 11 at the time of the previous refueling is stored in the memory means 25, and the refueled fuel information acquisition means 22 acquires this as the oil type identification information of the fuel that has been refueled when a new refueling is performed. For example, when the engine-driven work machine 1 is refueled for the first time, or when the memory of the fuel input via the input means 11 at the time of the previous refueling, in which all the fuel that has been refueled was removed from the engine-driven work machine 1 and stored in the memory means 25, has been reset, the information that should be acquired by the refueled fuel information acquisition means 22 as the oil type identification information is not stored in the memory means 25. In this case, no mixing of different types of fuel will occur regardless of whether diesel, B100 fuel, or GTL fuel is newly refueled, so in this embodiment, even in such cases, the comparison means 23 determines that the oil type of the fuel to be refueled and the oil type of the fuel that has been refueled match.

[0055] (6) Operation control means The judgment result in the comparison means 23 is sent to the operation control means 24, and when the comparison means 23 determines that there is a mismatch between the oil type of the fuel to be refueled and the oil type of the fuel that has already been refueled, the operation control means 24 executes an operation control process to cause the engine-driven work machine 1 (the refueling suppression means 30 provided in the engine-driven work machine 1) to perform a predetermined refueling suppression operation.

[0056] In this embodiment, the operation control means 24 is configured to cause the refueling suppression means 30 to perform a predetermined operation, as described below, not only when the comparison means 23 determines that the oil type of the fuel to be refueled and the oil type of the fuel that has already been refueled do not match, but also when it determines that they match.

[0057] (7) Refueling control measures The refueling suppression means 30 is controlled by the operation control means 24 to execute a predetermined refueling suppression operation when the comparison means 23 determines that the oil type of the fuel to be refueled and the oil type of the fuel that has already been refueled do not match.

[0058] In this embodiment, the refueling suppression means 30 is provided with notification means 31 such as a display device 31a such as a display or warning light and an alarm device 31b provided on the engine-driven work machine 1, and a locking mechanism 32 equipped with an electronic lock or the like that locks the refueling window 7 for accessing the refueling port of the fuel tank of the engine-driven work machine 1 and makes it impossible to open the opening / closing door 8, and when the comparison means 23 determines that the oil type of the fuel to be refueled does not match the oil type of the fuel that has already been refueled, a refueling suppression action such as a warning display by the display device 31a or a warning sound by the alarm device 31b is performed in response to a control signal from the operation control means 24, thereby alerting the refueling worker to refrain from starting the refueling operation, and / or a refueling suppression action is performed by the above-mentioned locking mechanism 32 to lock the refueling window 7 and make it impossible to open the opening / closing door 8, thereby making it physically impossible for the refueling worker to start refueling, thereby suppressing the occurrence of erroneous refueling.

[0059] In this embodiment, the input means 11 described above has the function of an unlocking switch for the fuel fill window 7, and the fuel to be refueled is input using the input means 11. When the type of fuel to be refueled input by the comparison means 23 matches the type of fuel that has already been refueled and stored in the memory means, the locking mechanism 32 unlocks the fuel fill window 7 and opens the opening / closing door 8.

[0060] Alternatively to this configuration, the fuel fill window 7 may be unlocked, for example, by an unlock switch (not shown) provided separately from the input means 11, and a fuel fill suppression operation may be performed such that operation of the unlock switch is disabled to make it impossible to unlock the window until it is determined that the type of fuel to be filled input via the input means 11 matches the type of fuel that has already been filled stored in the memory means 25.

[0061] (8) Operation, etc. Next, the operation of the missupply prevention device 10 of the first embodiment described with reference to FIG. 1 will be described with reference to the flowchart of FIG.

[0062] Although refueling can be performed while the engine is running, it is preferable to perform it with the engine stopped from the viewpoint of preventing accidents, and it is preferable to perform refueling with only the control power supply (ACC power supply) turned ON without starting the engine by operating the key switch. At this time, the locking mechanism 32 of the refueling suppression means 30 keeps the refueling window 7 in a locked state, and the opening and closing door 8 cannot be opened (S1-1).

[0063] By turning on the control power supply of the engine-driven work machine 1, it becomes possible to operate the touch panel which is the input means 11, and the refueling worker performing the refueling operation selects and inputs the new fuel that is to be refueled (fuel to be refueled) via the input means 11 before starting the refueling operation.The information on the fuel to be refueled selected via this input means 11 is acquired by the planned refueling fuel information acquisition means 21 as oil type identification information for the fuel to be refueled (S1-2).

[0064] On the other hand, when the fuel to be refueled is selected using the input means 11, the electronic control device 20 activates the refueled fuel information acquisition means 22, and if the refueled fuel stored in the memory means 25 (in this embodiment, the fuel selected via the input means 11 at the time of the previous refueling) is stored (``Yes'' in S1-3), the refueled fuel information acquisition means 22 acquires information on the refueled fuel stored in the memory means 25 as oil type identification information (S1-4).

[0065] Then, the oil type identification information of the fuel to be refueled acquired by the planned refueling fuel information acquisition means 21 (information of the fuel to be refueled input by the input means 11 when refueling for the first time in this embodiment) is compared by the comparison means 23 with the oil type identification information of the fuel that has already been refueled acquired by the already refueled fuel information acquisition means 22 (information of the fuel input by the input means 11 at the time of the previous refueling) (S1-5).

[0066] As a result of the comparison, if the oil type identification information of the fuel to be refueled and the oil type identification information of the fuel that has already been refueled correspond to each other (YES in S1-5), or if the oil type identification information of the fuel that has already been refueled is not stored in the memory means 25 (``None'' in S1-3), the comparison means 23 determines that the oil type of the fuel to be refueled and the oil type of the fuel that has already been refueled match (S1-6).

[0067] Based on this determination result, the operation control means 24 outputs an unlock signal to the locking mechanism 32 of the fuel supply inhibition means 30, unlocking the fuel supply window 7 and allowing the opening and closing door 8 to be opened, thereby enabling fuel supply (S1-7).

[0068] After refueling, when the opening / closing door 8 is closed, it is locked by the locking mechanism 32 (S1-8), and the oil type of the fuel to be refueled input via the input means 11 is stored (including overwritten) in the memory means 25 as the oil type identification information of the refueled fuel to be acquired by the refueled fuel information acquisition means 22 at the next refueling, or the memory of the already stored oil type identification information is maintained (S1-9), and the device enters a standby state until new fuel to be refueled is input via the input means 11 for the next refueling (S1-2).

[0069] On the other hand, if the oil type identification information of the fuel to be refueled and the oil type identification information of the fuel that has already been refueled do not match (NO in S1-5), the comparison means 23 determines that there is a mismatch between the oil type of the fuel to be refueled and the oil type of the fuel that has already been refueled (S1-10).

[0070] According to this determination result, the operation control means 24 outputs a control command to the notification means 31 and locking mechanism 32, which are the refueling suppression means 30, to perform a refueling suppression operation. Upon receiving this control command, the notification means 31 issues a warning as a refueling suppression operation (displaying a warning on the display device 31a and issuing a warning sound from the alarm 31b), thereby alerting the refueling worker not to start refueling (S1-11). In addition, the locking mechanism 32 keeps the refueling window 7 in a locked state as a refueling suppression operation, thereby preventing the opening and closing door 8 from being opened and physically preventing the refueling worker from starting refueling (S1-12).

[0071] In addition, when the refueling suppression operation (issuing an alarm and maintaining the lock) is performed by the refueling suppression means 30, a reset can be performed, for example, by touching a reset display provided on the input means 11 (S1-13), thereby causing the notification means 31 to stop notifying (S1-14) and return to a standby state for input of new fuel to be refueled by the input means 11 (S1-2).

[0072] [Missupply prevention device (Example 2)] (1) Overall structure In the configuration of the erroneous fuel supply prevention device 10 described above with reference to Figures 1 and 2, the fuel input by the input means 11 at the time of the previous refueling is stored in the memory means 25, and at the time of new refueling, the fuel to be refueled input by the input means 11 is compared to whether it corresponds to the fuel stored in the memory means to determine whether the oil type of the fuel to be refueled matches the oil type of the fuel already refueled.

[0073] In contrast, in the embodiment shown in Figure 3, a predetermined characteristic value of the fuel (ultrasonic propagation velocity in the embodiment) is used as the above-mentioned oil type identification information, and the range of the predetermined characteristic values ​​of each fuel belonging to a fuel group that can be used in the engine-driven work machine 1 is stored in the memory means 25 as a fuel characteristic standard range (Ymin to Ymax).By comparing the fuel characteristic standard range (Ymin to Ymax) corresponding to the type of fuel inputted as the fuel to be refueled by the input means 11 at the time of new refueling with the characteristic value (fuel characteristic detection value) Y of the fuel actually present in the fuel supply system of the engine-driven work machine 1 detected by the fuel characteristic detection sensor 41, it is possible to determine whether the type of fuel to be refueled matches the type of fuel that has already been refueled.

[0074] In this way, in order to enable comparison and judgment using predetermined characteristic values ​​of the fuel as oil type identification information, the mis-fueling prevention device 10 shown in Figure 3 further includes a fuel characteristic detection sensor 41 and a temperature sensor 42 in addition to the configuration of the mis-fueling prevention device 10 described with reference to Figure 1, and differs from the mis-fueling prevention device 10 of Example 1 described with reference to Figure 1 in the information to be stored in the memory means 25, the operation of the planned refueling fuel information acquisition means 21, the operation of the already-refueled fuel information acquisition means 22, and the operation of the comparison means 23, as will be described later.

[0075] (2) Fuel property detection sensor The fuel characteristic detection sensor 41 is provided at any position in the fuel supply system and detects a predetermined characteristic value (fuel characteristic detection value Y) of the fuel (fuel already refueled) present in the fuel supply system. In this embodiment, an ultrasonic sensor is provided in the fuel tank of the engine-driven work machine 1 as the fuel characteristic detection sensor 41, and the ultrasonic sensor 41 is capable of detecting the ultrasonic propagation speed of the fuel in the fuel tank.

[0076] As the fuel characteristic detection sensor 41, instead of or in addition to the ultrasonic sensor described above, a capacitance sensor or a thermal conductivity sensor may be provided to detect the capacitance or thermal conductivity of the fuel as the fuel characteristic detection value Y, and two or more types of the fuel characteristic detection sensors 41 described above may also be combined.

[0077] (3) Temperature sensor The temperature sensor 42 detects the temperature of the fuel at a certain position in the fuel supply system of the engine-driven work machine 1. In this embodiment, this configuration is necessary because the oil type identification information is the ultrasonic propagation speed, whose characteristics change with changes in fuel temperature. If characteristics that do not change with fuel temperature are used as the oil type identification information, there is no need to provide the temperature sensor 42.

[0078] The temperature sensor 42 may be provided at any position in the fuel supply system, but is preferably provided at the same position as the fuel characteristic detection sensor 41 described above.

[0079] In this embodiment, the ultrasonic sensor which is the fuel property detection sensor 41 described above is provided together with the temperature sensor 42 described above at a common position within the fuel tank.

[0080] (4) Storage means The memory means 25 stores a range of predetermined characteristic values ​​for each of the fuels (in this embodiment, diesel, B100 fuel, and GTL fuel) belonging to a fuel group that can be used in the engine-driven work machine 1 as a fuel characteristic standard range.

[0081] In the configuration of this embodiment, an ultrasonic sensor is provided as the fuel characteristic detection sensor 41, and the ultrasonic propagation velocity of the fuel detected by this ultrasonic sensor is acquired by the refueled fuel information acquisition means 22 described below as oil type identification information of the refueled fuel.The general numerical range of the ultrasonic propagation velocity of each fuel belonging to the above-mentioned fuel group (in the embodiment, diesel, B100 fuel, and GTL fuel) is stored in the memory means 25 as the above-mentioned fuel characteristic standard range (Ymin to Ymax).

[0082] In addition, in this embodiment, in which the ultrasonic propagation velocity that changes with a change in fuel temperature X is used as the fuel characteristic value, the corresponding relationship of the change in the fuel characteristic reference range (Ymin to Ymax) with respect to the change in fuel temperature X is also stored in advance in the storage means, as shown in FIG.

[0083] However, if the characteristic value of the fuel used as the comparison standard is one that does not change with changes in fuel temperature X, it is not necessary to store in the memory means the change in the fuel characteristic reference range in response to changes in fuel temperature X.

[0084] In addition, in this embodiment, an example has been described in which ultrasonic propagation velocity is used as the characteristic value of the fuel used in the comparison, but the characteristic value of the fuel used in the comparison is not limited to ultrasonic propagation velocity, and various characteristic values ​​such as the electrostatic capacitance and thermal conductivity of the fuel can be used, and multiple of these may be used in combination.

[0085] In this case, two or more types of fuel characteristic reference ranges are stored in the storage means 25 in accordance with the characteristic values ​​to be used in combination.

[0086] (5) Means for acquiring information on scheduled refueling In this embodiment, the fuel information acquisition means 21 for refueling acquires the fuel characteristic standard range (Ymin to Ymax) of the fuel to be refueled, which is input via the input means 11 when new refueling, from the above-mentioned fuel characteristic standard range (Ymin to Ymax) stored in the memory means 25, as oil type identification information of the fuel to be refueled.

[0087] In this embodiment, in which the ultrasonic propagation speed, whose characteristics change depending on the fuel temperature, is adopted as the fuel characteristic value used as the oil type identification information, the scheduled refueling fuel information acquisition means 21 calculates the fuel characteristic standard range (Ymin to Ymax) at the detected temperature X of the oil type input as the fuel to be refueled, based on the oil type of the fuel to be refueled input by the input means 11, the fuel temperature X detected by the temperature sensor 42, and the correlation between the fuel temperature and the fuel characteristic standard range stored in the storage means 25 (see FIG. 4), and acquires the calculated fuel characteristic standard range (Ymin to Ymax) as the oil type identification information of the fuel to be refueled.

[0088] For example, if the fuel input by the input means 11 as the fuel to be refueled is B100 fuel and the fuel temperature X detected by the temperature sensor 42 is 30°C, the fuel to be refueled information acquisition means 21 calculates a fuel characteristic standard range (see Figure 4) consisting of a lower limit value indicated by Ymin (B100 / 30°C) and an upper limit value indicated by Ymax (B100 / 30°C) based on the correlation between the fuel temperature and the fuel characteristic standard range stored in the memory means 25, and acquires this value as the oil type identification information of the fuel to be refueled.

[0089] (6) Means for acquiring refueled fuel information The refueled fuel information acquisition means 22 acquires a predetermined characteristic value (fuel characteristic detection value) Y of the fuel detected by a fuel characteristic detection sensor 41 provided at any position in the fuel supply system of the engine-driven work machine 1 as oil type identification information of the refueled fuel.

[0090]

[0091] (7) Comparison means The comparison means 23 compares the fuel property reference range (Ymin to Ymax) of the fuel to be refueled acquired by the fuel-to-be-refueled information acquisition means 21 with the fuel property detection value Y of the fuel already refueled acquired by the fuel-already-refueled information acquisition means 22. When the fuel property detection value Y of the fuel already refueled is within the numerical range of the fuel property reference range (Ymin to Ymax) of the fuel to be refueled (Ymin ≤ Y ≤ Ymax), it is determined that the fuel type of the fuel to be refueled matches the fuel type of the fuel already refueled. When the fuel property detection value Y of the fuel already refueled is outside the numerical range of the fuel property reference range (Ymin to Ymax) of the fuel to be refueled (Ymin > Y or Ymax < Y), it is determined that the fuel type of the fuel to be refueled does not match the fuel type of the fuel already refueled.

[0092] (8) Operations, etc. Next, the operation of the misfueling prevention device 10 of the second embodiment described with reference to FIG. 3 will be described with reference to the flowchart of FIG. 5.

[0093] When the control power supply (ACC power supply) of the engine-driven work machine 1 is turned on and the locking mechanism 32 maintains the fuel filling window 7 in the locked state so that the opening / closing door 8 cannot be opened (S2-1), when the fuel type of the fuel (fuel to be refueled) for which refueling is newly planned is input via the input means 11 (S2-2), the fuel-to-be-refueled information acquisition means 21 is activated.

[0094] The scheduled refueling fuel information acquisition means 21 calculates the fuel characteristic standard range (Ymin to Ymax) of the input fuel to be refueled at the detected fuel temperature X based on the fuel type input by the input means 11 and the fuel temperature X detected by the temperature sensor 42 from the fuel characteristic standard range stored in the memory means 25, and acquires the calculated fuel characteristic standard range (Ymin to Ymax) as the oil type identification information of the fuel to be refueled (S2-3).

[0095] On the other hand, when the fuel to be refueled is selected by the input means 11, the refueled fuel information acquisition means 22 is activated, and the ultrasonic propagation speed of the fuel in the fuel tank (fuel characteristic detection value Y) detected by the ultrasonic sensor which is the fuel characteristic detection sensor 41 is acquired as oil type identification information of the refueled fuel (S2-4).

[0096] Then, the oil type identification information of the fuel to be refueled (fuel characteristic standard range {Ymin to Ymax}) acquired by the scheduled refueling fuel information acquisition means 21 is compared with the oil type identification information of the already refueled fuel (fuel characteristic detection value Y) acquired by the already refueled fuel information acquisition means 22 by the comparison means 23 (S2-5).

[0097] As a result of the comparison by the comparison means 24, if the oil type identification information of the fuel that has already been refueled (fuel characteristic detection value Y) is within the range of the oil type identification information of the fuel to be refueled (fuel characteristic standard range {Ymin to Ymax}) (YES in S2-5), the comparison means 23 determines that the oil type of the fuel to be refueled and the oil type of the fuel that has already been refueled match (S2-6).

[0098] Based on this determination result, the operation control means 24 outputs an unlock signal to the locking mechanism 32 of the fuel supply inhibition means 30, unlocking the fuel supply window 7 and allowing the opening and closing door 8 to be opened, thereby enabling fuel supply (S2-7).

[0099] After refueling, when the opening / closing door 8 is closed, it is locked by the locking mechanism 32 (S2-8), and the system goes into standby mode until the fuel to be refueled is input by the input means 11 (S2-2) at the next time of refueling.

[0100] On the other hand, if the oil type identification information of the fuel that has already been refueled (fuel characteristic detection value Y) is outside the oil type identification information of the fuel to be refueled (fuel characteristic standard range {Ymin to Ymax}) (NO in S2-5), the comparison means 23 determines that the oil type of the fuel to be refueled and the oil type of the fuel that has already been refueled do not match (S2-9).

[0101] According to this determination result, the operation control means 24 outputs a control signal to the alarm means 31 and locking mechanism 32, which are the refueling suppression means 30, to cause them to perform a refueling suppression operation. Upon receiving this control signal, the alarm means 31 issues an alarm (a warning display by the display device 31a and an alarm sound by the alarm 31b) as a refueling suppression operation, thereby alerting the refueling worker not to start refueling (S2-10). In addition, the locking mechanism 32 keeps the refueling window 7 in a locked state and prevents the opening and closing door 8 from being opened, thereby physically preventing the refueling worker from starting refueling (S2-11).

[0102] Thereafter, when a reset is performed by the fueling worker (S2-12), the notification means 31 stops notifying the user (S2-13), and the system goes into a standby state until a new fuel to be refueled is input by the input means 11 (S2-2).

[0103] [Modification (Example 3)] In the embodiment described above, the determination of whether the type of fuel to be refueled and the type of fuel already refueled match is performed by: In the first embodiment described with reference to FIG. 1 and FIG. 2, the fuel input via the input means 11 at the time of new refueling is compared with the fuel input via the input means 11 at the time of previous refueling stored in the memory means 25. In the second embodiment described with reference to Figures 3 to 5, a case was described in which the fuel characteristic standard range (Ymin to Ymax) of the fuel type input by the input means 11, among the fuel characteristic standard ranges of the fuel group stored in the memory means 25, is compared with the fuel characteristic detection value Y of the fuel in the fuel supply system detected by the fuel characteristic detection sensor 41.

[0104] In contrast, the mis-fueling prevention device 10 shown in Figure 6 is configured to have a judgment criterion switching means 26 that executes a judgment criterion switching process to switch the criterion for comparing the oil type of the fuel to be refueled with the oil type of the fuel that has already been refueled between the criterion adopted in the above-mentioned Example 1 (Figures 1 and 2) and the criterion adopted in Example 2 (Figures 3 to 5) based on whether or not fuel characteristics are detected by the fuel characteristics detection sensor 41.

[0105] By providing the judgment criterion switching means 26 in this manner, when fuel characteristics are being detected by the fuel characteristics detection sensor 41, a judgment as to whether the oil type of the fuel to be refueled matches the oil type of the fuel that has already been refueled is made by comparing the fuel characteristics reference range (Ymin to Ymax) of the fuel to be refueled with the fuel characteristics detection value Y of the fuel that has already been refueled detected by the fuel characteristics detection sensor 41 (the judgment criterion in the second embodiment described with reference to Figures 3 to 5), and when fuel characteristics are not being detected by the fuel characteristics detection sensor 41 (for example, when the fuel characteristics detection sensor 41 has failed or the detection part of the fuel characteristics detection sensor 41 is exposed above the fuel liquid surface due to insufficient fuel remaining in the fuel tank), a judgment as to whether the oil type of the fuel to be refueled matches the oil type of the fuel that has already been refueled is made by comparing the fuel inputted via the input means 11 at the time of new refueling with the fuel inputted via the input means 11 at the time of previous refueling that is stored in the memory means 25 (the judgment criterion in the first embodiment described with reference to Figures 1 and 2).

[0106] With this configuration, as shown in FIG. 7, when the power supply (ACC power supply) of the engine-driven work machine is turned on and the fuel filler window 7 is kept locked (S3-1), and the fuel to be filled is input using the input means 11 (S3-2), the judgment criteria switching means 26 is activated and judges whether the fuel characteristics detection sensor 41 is performing detection (S3-3).

[0107] Then, when it is determined that the fuel property detection sensor 41 is performing detection (S3-3 YES), a determination is made as to whether the oil type of the fuel to be refueled matches the oil type of the fuel that has already been refueled based on a comparison between the fuel property standard range (Ymin to Ymax) of the fuel to be refueled and the fuel property detection value Y of the fuel that has already been refueled detected by the fuel property detection sensor 41, and the processing of (S2-3) to (S2-13) in Figure 5 is performed.

[0108] On the other hand, when it is determined that the fuel characteristic detection sensor 41 is not performing detection (S3-3 NO), the processes of (S1-3) to (S1-14) in Figure 2 are performed to determine whether the oil type of the fuel to be refueled matches the oil type of the fuel already refueled based on a comparison between the oil type of the fuel to be refueled input via the input means 11 for new refueling and the oil type of the fuel input via the input means 11 at the time of the previous refueling, which is stored in the memory means 25. [Explanation of symbols]

[0109] 1 Engine-driven work equipment 7 Fuel window 8 Opening and closing doors 10. Mis-fueling prevention device 11 Input methods 20 Electronic control device 21 Means of acquiring fuel information scheduled for refueling 22 Means of acquiring fuel information 23 Means of comparison 24 Operation control means 25 Memory means 26 Judgment criteria switching means 30 Refueling Control Measures 31 Notification means 31a Display device 31b Alarm 32 Locking mechanism 41 Fuel property detection sensor 42 Temperature Sensor Ymin~Ymax Fuel property standard range Y Fuel characteristic detection value X Fuel temperature

Claims

1. In an engine-driven work machine equipped with a diesel engine and using one type of fuel selected from a fuel group consisting of diesel and diesel alternative fuels, Predetermined information that enables the oil type of the fuel belonging to the fuel group to be identified is oil type identification information, Before starting a new refueling operation, An input process for inputting the fuel to be refueled when new refueling is performed; A fuel refueling schedule information acquisition process for acquiring the oil type identification information of the fuel to be refueled input in the input process; A fuel-supplied fuel information acquisition process for acquiring fuel type identification information of the fuel that was supplied to the engine-driven working machine at the previous refueling; a comparison process for comparing the oil type identification information of the fuel to be refueled, acquired in the fuel information acquisition process for planning refueling, with the oil type identification information of the fuel that has been refueled, acquired in the fuel information acquisition process for planning refueling, and determining that the oil type of the fuel to be refueled and the oil type of the fuel that has been refueled match when the oil type identification information of the fuel to be refueled and the oil type identification information of the fuel that has been refueled correspond to each other, and determining that the oil type of the fuel to be refueled and the oil type of the fuel that has been refueled do not match when the oil type identification information of the fuel to be refueled and the oil type identification information of the fuel that has been refueled do not correspond to each other; A method for preventing erroneous refueling in an engine-driven working machine, characterized in that when the comparison process determines that the oil type of the fuel to be refueled does not match the oil type of the fuel that has already been refueled, an operation control process is executed to cause the engine-driven working machine to perform a predetermined refueling prevention operation.

2. The fuel supply suppression operation performed by the engine-driven working machine in the operation control process is Notification of a warning by a notification means provided in the engine-driven working machine, and / or The inability to open the opening and closing door provided on the fuel filler window for accessing the fuel filler port of the fuel tank of the engine-driven working machine, 2. The method for suppressing erroneous fuel supply to an engine-driven working machine according to claim 1,

3. The fuel input as the fuel to be refueled in the input process at the time of the previous refueling is stored in the storage means as the fuel already refueled, In the fuel information acquisition process for refueling, the fuel type identification information of the fuel to be refueled input in the input process is acquired when refueling a new fuel, In the refueled fuel information acquisition process, oil type identification information of the refueled fuel stored in the storage means is acquired, In the comparison process, Oil type identification information of the fuel to be refueled that was acquired in the fuel information acquisition process and input in the input process when refueling a new fuel; 3. The method for preventing erroneous fueling of an engine-driven working machine according to claim 1, further comprising the step of comparing the fuel type identification information of the fuel inputted in the input process at the time of previous refueling, which is acquired in the refueled fuel information acquisition process.

4. A range of predetermined characteristic values ​​of each of the fuels belonging to the fuel group is stored in a storage means as a fuel characteristic reference range, In the fuel information acquisition process for refueling, the fuel characteristic standard range corresponding to the fuel inputted as the fuel to be refueled in the input process at the time of new refueling is acquired as the oil type identification information of the fuel to be refueled from among the fuel characteristic standard ranges stored in the storage means, and In the refueled fuel information acquisition process, a fuel characteristic detection value, which is a detection value for the predetermined characteristic of the fuel in the fuel supply system detected at any position in the fuel supply system of the engine-driven working machine, is acquired as oil type identification information of the refueled fuel; 3. A method for preventing mis-refueling in an engine-driven working machine as described in claim 1 or 2, characterized in that in the comparison process, the fuel property detection value of the refueled fuel acquired in the refueled fuel information acquisition process is compared with the fuel property standard range of the fuel to be refueled acquired in the planned refueling fuel information acquisition process, and when the fuel property detection value of the refueled fuel is within the fuel property standard range of the fuel to be refueled, it is determined that the oil type of the fuel to be refueled and the oil type of the refueled fuel match, and when the fuel property detection value of the refueled fuel is outside the fuel property standard range of the fuel to be refueled, it is determined that the oil type of the fuel to be refueled and the oil type of the refueled fuel do not match.

5. The fuel input as the fuel to be refueled in the input process at the time of the previous refueling is stored in the storage means as the fuel already refueled, and the range of the predetermined characteristic values ​​of each of the fuels belonging to the fuel group is stored in the storage means as a fuel characteristic reference range, a fuel characteristic detection sensor for detecting a predetermined characteristic of fuel is provided at any position in a fuel supply system of the engine-driven working machine; execute a judgment criterion switching process for switching oil type identification information used for comparing the oil type of the fuel to be refueled with the oil type of the fuel that has already been refueled depending on whether the fuel characteristic detection sensor detects the characteristics of the fuel; By the judgment criteria switching process, When the fuel characteristic detection sensor does not detect the characteristics of the fuel, In the fuel information acquisition process, the fuel type identification information of the fuel to be refueled input in the input process at the time of new refueling is acquired, In the refueled fuel information acquisition process, the oil type identification information of the refueled fuel stored in the storage means is acquired, In the comparison process, Oil type identification information of the fuel to be refueled that was acquired in the fuel information acquisition process and input in the input process when refueling a new fuel; The fuel type identification information acquired in the refueled fuel information acquisition process is compared with the fuel type identification information input in the input process at the time of the previous refueling, When the fuel characteristic detection sensor detects the characteristics of the fuel, In the fuel information acquisition process for refueling, the fuel characteristic standard range corresponding to the fuel inputted as the fuel to be refueled in the input process at the time of new refueling is acquired as the oil type identification information of the fuel to be refueled from among the fuel characteristic standard ranges stored in the storage means, and In the refueled fuel information acquisition process, a fuel characteristic detection value, which is a detection value for the predetermined characteristic of the fuel in the fuel supply system detected by the fuel characteristic detection sensor, is acquired as oil type identification information of the refueled fuel; In the comparison process, the fuel property detection value of the refueled fuel acquired in the refueled fuel information acquisition process is compared with the fuel property standard range of the fuel to be refueled acquired in the planned refueling fuel information acquisition process, and when the fuel property detection value of the refueled fuel is within the fuel property standard range of the fuel to be refueled, it is determined that the oil type of the fuel to be refueled and the oil type of the refueled fuel match, and when the fuel property detection value of the refueled fuel is outside the fuel property standard range of the fuel to be refueled, it is determined that the oil type of the fuel to be refueled and the oil type of the refueled fuel do not match.

3. A method for suppressing erroneous fuel supply in an engine-driven working machine according to claim 1 or 2.

6. In an engine-driven work machine equipped with a diesel engine and using one type of fuel selected from a fuel group consisting of diesel and diesel alternative fuels, Predetermined information that enables the oil type of the fuel belonging to the fuel group to be identified is oil type identification information, An input means for inputting a fuel to be refueled at the time of new refueling before starting a new refueling operation; A fuel refueling schedule information acquisition means for acquiring the oil type identification information of the fuel to be refueled input by the input means; A fuel-supplied fuel information acquisition means for acquiring fuel type identification information of the fuel that was supplied to the engine-driven working machine at the previous refueling; a comparison means for comparing the oil type identification information of the fuel to be refueled, acquired by the fuel information acquisition means for planning refueling, with the oil type identification information of the fuel already refueled, acquired by the fuel information acquisition means for planning refueling, and determining that the oil type of the fuel to be refueled and the oil type of the fuel already refueled match when the oil type identification information of the fuel to be refueled and the oil type identification information of the fuel already refueled correspond to each other, and determining that the oil type of the fuel to be refueled and the oil type of the fuel already refueled do not match when the oil type identification information of the fuel to be refueled and the oil type identification information of the fuel already refueled do not correspond to each other; An erroneous fuel supply prevention device for an engine-driven working machine, characterized in that it is equipped with an operation control means that causes the engine-driven working machine to perform a predetermined refueling prevention operation when the comparison means determines that the oil type of the fuel to be refueled does not match the oil type of the fuel that has already been refueled.

7. The fuel supply suppression operation that the operation control means causes the engine-driven working machine to perform is Notification of a warning by a notification means provided in the engine-driven working machine, and / or The inability to open the opening and closing door provided on the fuel filler window for accessing the fuel filler port of the fuel tank of the engine-driven working machine, 7. The mis-fueling prevention device for an engine-driven working machine according to claim 6,

8. providing a storage means for storing the fuel input as the fuel to be refueled in the input process at the time of the previous refueling as the fuel already refueled; The fuel information acquisition means acquires the oil type identification information of the fuel to be refueled input by the input means when refueling a new fuel, The refueled fuel information acquisition means acquires the oil type identification information of the refueled fuel stored in the storage means, The comparison means: The fuel type identification information of the fuel to be refueled, which is acquired by the fuel information acquisition means and input by the input means at the time of new refueling, 8. The device for preventing erroneous fuel supply for an engine-driven working machine according to claim 6 or 7, characterized in that the fuel type identification information acquired by the fuel-supplied fuel information acquisition means is compared with the fuel type identification information input by the input means at the time of previous refueling.

9. providing a storage means for storing a range of predetermined characteristic values ​​of each of the fuels belonging to the fuel group as a fuel characteristic reference range; The fuel information acquisition means for refueling schedule acquires, from among the fuel characteristic standard ranges stored in the storage means, the fuel characteristic standard range corresponding to the fuel inputted as the fuel to be refueled by the input means at the time of new refueling, as oil type identification information of the fuel to be refueled, and The fuel-supply information acquisition means acquires a fuel characteristic detection value Y, which is a detection value for the predetermined characteristic of the fuel in the fuel supply system detected at any position in the fuel supply system of the engine-driven working machine, as oil type identification information of the fuel-supply, The mis-fueling prevention device for an engine-driven working machine as described in claim 6 or 7, characterized in that the comparison means compares the fuel property detection value of the refueled fuel acquired by the refueled fuel information acquisition means with the fuel property standard range of the fuel to be refueled acquired by the planned refueling fuel information acquisition means, and determines that the oil type of the fuel to be refueled and the oil type of the refueled fuel match when the fuel property detection value of the refueled fuel is within the fuel property standard range of the fuel to be refueled, and determines that the oil type of the fuel to be refueled and the oil type of the refueled fuel do not match when the fuel property detection value of the refueled fuel is outside the fuel property standard range of the fuel to be refueled.

10. A storage means is provided for storing the fuel inputted as the fuel to be refueled by the input means at the time of the previous refueling as the fuel already refueled, and for storing the range of the respective predetermined characteristic values ​​of the fuels belonging to the fuel group as the fuel characteristic reference range, a fuel characteristic detection sensor for detecting a predetermined characteristic of fuel is provided at any position in a fuel supply system of the engine-driven working machine; a determination criterion switching means for switching oil type identification information used for comparing the oil type of the fuel to be refueled with the oil type of the fuel already refueled depending on whether the fuel characteristic detection sensor detects the characteristics of the fuel; The judgment criterion switching means When the fuel characteristic detection sensor does not detect the characteristics of the fuel, The fuel information acquisition means acquires the oil type identification information of the fuel to be refueled input by the input means when refueling a new fuel, The refueled fuel information acquisition means acquires the oil type identification information of the refueled fuel stored in the storage means, The comparison means: The fuel type identification information of the fuel to be refueled, which is acquired by the fuel information acquisition means and input by the input means at the time of new refueling, The fuel type identification information acquired by the refueled fuel information acquisition means is compared with the fuel type identification information input by the input means at the time of the previous refueling, When the fuel characteristic detection sensor detects the characteristics of the fuel, The fuel information acquisition means for refueling schedule acquires, from among the fuel characteristic standard ranges stored in the storage means, the fuel characteristic standard range corresponding to the fuel input as the fuel to be refueled in the input process at the time of new refueling, as oil type identification information of the fuel to be refueled, and the fuel supply information acquisition means acquires a fuel characteristic detection value, which is a detection value for the predetermined characteristic of the fuel in the fuel supply system detected by the fuel characteristic detection sensor, as oil type identification information of the fuel supply; the comparison means compares the fuel property detection value of the refueled fuel acquired by the refueled fuel information acquisition means with the fuel property standard range of the fuel to be refueled acquired by the planned refueling fuel information acquisition means, and determines that the oil type of the fuel to be refueled and the oil type of the refueled fuel match when the fuel property detection value of the refueled fuel is within the fuel property standard range of the fuel to be refueled, and determines that the oil type of the fuel to be refueled and the oil type of the refueled fuel do not match when the fuel property detection value of the refueled fuel is outside the fuel property standard range of the fuel to be refueled.

8. The device for preventing erroneous fuel supply in an engine-driven working machine according to claim 6 or 7.

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