Carbon dioxide discharge amount calculation method of engine drive type working machine and calculation device

Abstract

To automatically and exactly calculate a carbon fiber dioxide discharge amount of an engine drive type working machine which uses one kind of fuel selected from light oil and light oil alternative fuel.SOLUTION: Necessary information is stored in advance in storage means 11 which is arranged at a control device 10 of an engine drive type working machine, a kind of fuel in use is specified by fuel kind specification means 12 which is performed by the control device 10, an instantaneous fuel consumption amount [L / sec] being a fuel consumption amount per unit time is acquired by instantaneous fuel consumption amount acquisition means 13, an instantaneous discharge amount [g / sec] being a carbon dioxide discharge amount per unit time is calculated on the basis of a discharge coefficient [kg / L] and an instantaneous fuel consumption amount [L / sec] of fuel which is specified by the fuel kind specification means 12 out of the fuel discharge coefficient (a carbon dioxide discharge amount per 1 L-fuel) of the fuel which is stored in the storage means 11 by instantaneous discharge amount calculation means 14, and a discharge amount of a carbon dioxide can be exactly calculated even if the fuel for use is changed.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a carbon dioxide emission calculation method for an engine-driven working machine, and a carbon dioxide emission calculation device that executes said calculation method, and more specifically, to a carbon dioxide emission calculation method that can accurately calculate the carbon dioxide emission of an engine-driven working machine that is operated using any one of diesel and diesel alternative fuels depending on the situation, and a carbon dioxide emission calculation device that executes said calculation method. [Background technology]

[0002] Engine-driven work machines, in which the engine and the work machine body, such as the generator body or compressor body driven by the engine, are housed in a common soundproof box, for example, are widely used for outdoor work such as at civil engineering and construction sites due to their portability.

[0003] Such engine-driven working machines are powered by diesel engines, which are internal combustion engines, and therefore the use of such machines involves the emission of carbon dioxide.

[0004] Today, when there is a strong demand to move toward a carbon-free society, there is a strong need to reduce emissions of greenhouse gases such as carbon dioxide, and the Act on Promotion of Global Warming Countermeasures (the so-called "Global Warming Countermeasures Act") requires certain businesses to calculate their own greenhouse gas emissions and report them to the government.

[0005] In addition, such greenhouse gas emission reductions are also subject to trading, and if you want to sell your carbon dioxide emission reductions using a system for such trading (so-called "carbon credits" or "J-credits"), you will need to calculate the amount of carbon dioxide emission reductions you will achieve.

[0006] As a result, users of engine-driven working machines are increasingly calculating the carbon dioxide emissions and emission reductions of their machines, and there is a demand for engine-driven working machines to have the ability to automatically calculate and display the carbon dioxide emissions and emission reductions.

[0007] Regarding the calculation and display of carbon dioxide emissions, Patent Document 1 listed below describes a carbon dioxide emission display device for a work vehicle that is capable of calculating the amount of carbon dioxide emissions relative to fuel consumption based on the engine speed of the work vehicle and displaying it on a display screen in order to raise awareness of reducing carbon dioxide emissions among work vehicle operators (see [Abstract] in Patent Document 1).

[0008] In addition, Patent Document 2, listed below, describes an output device for a vehicle that calculates an instantaneous emission amount, which is the amount of carbon dioxide emitted per unit time, from the fuel consumption detected by a fuel sensor, and evaluates the instantaneous emission amount by comparing it with a threshold value, thereby making it possible to determine the quality of the operator's (driver's) current driving performance (see [Abstract] in Patent Document 2). [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2010-30509 A [Patent Document 2] JP 2014-240279 A Summary of the Invention [Problem to be solved by the invention]

[0010] 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 the amount of carbon dioxide emitted by the aforementioned engine-driven work machines, which are often used in these industries.

[0011] On the other hand, unlike the carbon dioxide emitted by vehicles, where it is possible to reduce carbon dioxide emissions by improving the operator's driving skills (accelerator work, etc.) as in Patent Documents 1 and 2 cited above, in engine-driven work machinery, where operation control after starting is generally performed automatically, carbon dioxide emissions cannot be reduced simply by improving the operator's awareness.In order to reduce carbon dioxide emissions, it is necessary to use GTL fuel, which has lower carbon dioxide emissions than diesel (higher emission reduction effect) and biofuels such as B100 fuel instead of general diesel as the fuel used in engine-driven work machinery, and with growing environmental awareness, some clients are now requiring contractors to use biofuels as a condition for participating in construction bids.

[0012] On the other hand, although preferential treatment such as tax exemptions are available for GTL fuel and biofuels such as B100 fuel, they are still more expensive than diesel and the routes for obtaining them are limited. Although it is recognized that the use of GTL fuel and biofuels has less of an impact on the environment, there may still be situations where diesel must be used as fuel, such as when using engine-driven work machinery at cost-conscious construction sites or in areas where GTL fuel and biofuels are difficult to obtain.

[0013] In addition, when engine-driven working machines are offered for rental, the type of fuel used to operate the engine-driven working machines will vary depending on the renter's level of awareness of environmental issues and the types of fuel that are easily available to them.

[0014] As a result, it is not always the case that the same fuel is always fueled and used for a single engine-driven work machine; instead, depending on changes in the conditions of use or the user, one type of fuel selected from diesel or diesel alternative fuels (GTL fuel, biofuels such as B100 fuel) may be selectively used.

[0015] Here, even when the same engine-driven work machine is used under the same load, the amount of carbon dioxide emissions differs depending on whether the fuel used is diesel, GTL fuel, or B100 fuel.

[0016] Therefore, if one wishes to accurately calculate the carbon dioxide emissions of engine-driven work machinery, the calculation must take into account the type of fuel used.

[0017] However, the inventions described in the above-mentioned Patent Documents 1 and 2 do not contemplate changing the fuel used, and do not have the means to calculate carbon dioxide emissions according to the type of fuel when the fuel used is changed.

[0018] Therefore, when the inventions described in Patent Documents 1 and 2 are applied to an engine-driven working machine that can use any one of diesel and diesel alternative fuels depending on the situation, it is not possible to accurately calculate carbon dioxide emissions.

[0019] Furthermore, since the above-mentioned Patent Documents 1 and 2 do not contemplate any change in the fuel to be used, it is not possible to calculate or display the amount of carbon dioxide emission reduction, which indicates the extent to which carbon dioxide emissions are reduced when using diesel alternative fuels such as GTL fuel or B100 fuel compared to the amount of carbon dioxide emissions when diesel is used.

[0020] Therefore, in order to accurately grasp the carbon dioxide emissions and emission reduction amounts for each engine-driven work machine, it is necessary to record the type of fuel used, the amount of fuel used, the amount of fuel remaining in the tank, etc. for each engine-driven work machine, and then to carry out the tedious work of calculating the carbon dioxide emissions and emission reduction amounts based on the data recorded in this way.

[0021] However, civil engineering and construction sites often use multiple engine-driven machines, and the task of calculating and understanding the carbon dioxide emissions and emission reductions for each engine-driven machine, each of which has a different model and operating conditions (fuel used, load rate, etc.), is complicated, and allocating personnel to do this would incur huge costs.

[0022] For this reason, there is a demand for a system that allows users to easily calculate and display the carbon dioxide emissions and emission reduction amounts for each engine-driven working machine.

[0023] Therefore, the present invention has been made to eliminate the shortcomings of the above-mentioned conventional technology, and has as its first object to provide a carbon dioxide emission calculation method for an engine-driven generator that can accurately calculate the amount of carbon dioxide emissions even when the type of fuel used is changed, and a carbon dioxide emission calculation device that executes said calculation method.

[0024] A second object of the present invention is to provide a carbon dioxide emission calculation method for an engine-driven working machine, which can calculate the amount of emission reduction, that is, the degree to which the carbon dioxide emission of the engine-driven working machine has been reduced compared to when it is operated using diesel, and a carbon dioxide emission calculation device for executing said calculation method. [Means for solving the problem]

[0025] 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.

[0026] In order to achieve the above object, the carbon dioxide emission calculation method of the engine-driven working machine of the present invention includes the following steps: A method for calculating carbon dioxide emissions from an engine-driven work machine that is equipped with a diesel engine and a work machine body 30 driven by the engine and that is operated using any one type of fuel selected from diesel and diesel alternative fuels, A storage means 11 is provided which stores an emission coefficient [kg / L], which is the amount of carbon dioxide emitted per a predetermined amount (for example, 1 L) of fuel, and a judgment criterion required for judging the type of fuel, which is previously acquired for each type of usable fuel; A fuel type identification process (see S101 in Figs. 3, 5 and 7) for identifying the type of fuel being used by comparing a detection signal (a detection signal of ultrasonic propagation velocity in the embodiment) from a fuel type detection means (an ultrasonic sensor in the embodiment) 20 provided at any position of a fuel supply system (a fuel tank not shown in the embodiment) with the judgment criteria stored in the storage means 11; An instantaneous fuel consumption acquisition process (see S102-S104 in Figures 3, 5, and 7) that identifies the fuel consumption per unit time (e.g., 1 second) [L] and acquires it as the instantaneous fuel consumption at the specific time [L / sec]; An instantaneous emission calculation process (see S105 in Figures 3, 5, and 7) for calculating an instantaneous emission amount [g / sec], which is an amount of carbon dioxide emitted per unit time, based on the emission coefficient [kg / L] of the type of fuel identified in the fuel type identification process and the instantaneous fuel consumption amount [L / sec] among the emission coefficients stored in the storage means 11; (Claim 1).

[0027] In the carbon dioxide emission calculation method having the above configuration, the correspondence relationship between the change in the instantaneous fuel consumption [L / sec] and the change in the load rate [%] of the work machine body for each type of usable fuel, which is previously acquired, is stored in the storage means 11 as a fuel consumption characteristic, In addition, the instantaneous fuel consumption acquisition process A load rate acquisition process (see S103 in Figs. 3, 5, and 7) for acquiring the load rate [%] of the work machine body 30; It may also be possible to include an instantaneous fuel consumption calculation process (see S104 in Figures 3, 5 and 7) that calculates the instantaneous fuel consumption [L / sec] based on the fuel consumption characteristics of the type of fuel identified in the fuel type identification process among the fuel consumption characteristics stored in the memory means 11 and the load factor [%] acquired in the load factor acquisition process (Claim 2).

[0028] Furthermore, in the carbon dioxide emission calculation method, a process of calculating a reference instantaneous fuel consumption rate [L / sec], which is the instantaneous fuel consumption rate [L / sec] assuming that the fuel being used is diesel fuel, based on the load rate [%] acquired in the load rate acquisition process and the fuel consumption rate characteristics of diesel fuel among the fuel consumption rate characteristics stored in the storage means 11 (see S202 in FIG. 5 ); A process of calculating a standard instantaneous emission amount [g / sec], which is the amount of carbon dioxide emitted per unit time assuming that the fuel is diesel, based on the emission coefficient [kg / L] of diesel among the emission coefficients [kg / L] stored in the storage means 11 and the standard instantaneous fuel consumption amount [L / sec] (see S203 in FIG. 5); It may also include a process (S204 in Figure 5) of calculating the difference between the reference instantaneous emission amount [g / sec] and the instantaneous emission amount [g / sec] as an instantaneous emission reduction amount [g / sec], which is the amount of carbon dioxide emission reduction per unit time (Claim 3).

[0029] In addition, instead of the above configuration, the instantaneous emission reduction amount [g / sec] mentioned above is, A process of calculating the difference between the emission coefficient [kg / L] of diesel among the emission coefficients [kg / L] stored in the storage means 11 and the emission coefficient [kg / L] of the type of fuel identified by the fuel type identification process as a reduction coefficient [kg / L] (see S301 in FIG. 7); The instantaneous fuel consumption [L / sec] obtained in the instantaneous fuel consumption acquisition process (see S102-S104 in FIG. 7) may be multiplied by the reduction coefficient [kg / L] to obtain a value as the instantaneous emission reduction [g / sec] (see S302 in FIG. 7) (Claim 4).

[0030] Any of the above carbon dioxide emission calculation methods may further include an emission amount display process (see S106 in Figures 3, 5 and 7) in which the instantaneous emission amount [g / sec] obtained in the above-mentioned instantaneous emission amount acquisition process (see S105 in Figures 3, 5 and 7) and / or the accumulated emission amount [g, kg, t], which is the accumulated value of carbon dioxide emission from a specified starting point to the time when the latest instantaneous fuel consumption amount [L / sec] was obtained, are displayed on a display device 40 such as a monitor screen provided on the instrument panel of an engine-driven work machine (Claim 5).

[0031] Furthermore, in the configuration for calculating the instantaneous emission reduction amount [g / sec], it may further include an emission reduction amount display process (S205 in Figures 5 and 7) that displays on the display device 40 the instantaneous emission reduction amount [g / sec] calculated in the instantaneous emission reduction amount calculation process (S204 in Figure 5 and S302 in Figure 7) and / or the accumulated emission reduction amount [g, kg, t], which is the accumulated value of the emission reduction amount from a specified starting point to the point at which the latest instantaneous fuel consumption amount [L / sec] was obtained (Claim 6).

[0032] In addition, the carbon dioxide emission calculation device 1 for an engine-driven working machine of the present invention is as follows: A carbon dioxide emission calculation device 1 for an engine-driven work machine that is equipped with a diesel engine and a work machine body 30 driven by the engine and that is operated using any one type of fuel selected from diesel and diesel alternative fuels, A storage means 11 that stores an emission coefficient [kg / L], which is the amount of carbon dioxide emitted per a predetermined amount (for example, 1 L) of fuel, and a judgment criterion required for judging the type of fuel, which is previously acquired for each type of usable fuel; a fuel type identification means 12 for identifying the type of fuel being used by comparing a detection signal (a detection signal of ultrasonic propagation velocity in the embodiment) from a fuel type detection means (an ultrasonic sensor in the embodiment) provided at any position in a fuel supply system (a fuel tank not shown in the embodiment) with the judgment criteria stored in the storage means 11; An instantaneous fuel consumption acquisition means 13 for identifying the fuel consumption per unit time (e.g., 1 second) [L] and acquiring the instantaneous fuel consumption at the specific time [L / sec]; an instantaneous emission amount calculation means 14 for calculating an instantaneous emission amount [g / sec], which is an amount of carbon dioxide emitted per unit time, based on the emission amount [kg / L] of the type of fuel identified by the fuel type identification means 12 among the emission amounts [kg / L] stored in the storage means and the instantaneous fuel consumption amount [L / sec]; (Claim 7: see Figs. 1, 4 and 6).

[0033] In the carbon dioxide emission calculation device 1 having the above configuration, the storage means 11 further stores the correspondence relationship between the change in the instantaneous fuel consumption [L / sec] and the change in the load rate [%] of the work machine body for each type of usable fuel, which has been previously acquired, as a fuel consumption characteristic (see FIG. 2 ), The instantaneous fuel consumption acquisition means 13 further includes A load rate acquisition means 131 for acquiring a load rate [%] of the work machine body 30; an instantaneous fuel consumption calculation means 132 for calculating the instantaneous fuel consumption [L / sec] based on the fuel consumption characteristics of the type of fuel identified by the fuel type identification means 12 among the fuel consumption characteristics stored in the storage means 11 and the load factor acquired by the load factor acquisition means 131; (Claim 8: see Figs. 1, 4 and 6).

[0034] In addition, the carbon dioxide emission calculation device 1 having the above configuration further includes: A reference instantaneous fuel consumption calculation means 16 for calculating a reference instantaneous fuel consumption amount [L / sec], which is an instantaneous fuel consumption amount when it is assumed that the fuel being used is diesel fuel, based on the load rate [%] acquired by the load rate acquisition means 131 and the fuel consumption characteristic of diesel fuel among the fuel consumption characteristics stored in the storage means 11; A standard instantaneous emission amount calculation means 17 calculates a standard instantaneous emission amount [g / sec], which is the amount of carbon dioxide emitted per unit time on the assumption that the fuel is diesel, based on the emission coefficient [kg / L] of diesel among the emission coefficients [kg / L] stored in the storage means 11 and the standard instantaneous fuel consumption amount [L / sec] calculated by the standard instantaneous fuel consumption amount calculation means 16; and It is also possible to provide an instantaneous emission reduction calculation means 18 which calculates the difference between the standard instantaneous emission amount [g / sec] calculated by the standard instantaneous emission amount calculation means 17 and the instantaneous emission amount [g / sec] calculated by the instantaneous emission amount calculation means 14 as an instantaneous emission reduction amount [g / sec], which is the amount of carbon dioxide emission reduction per unit time (Claim 9: see Figure 4).

[0035] Instead of the above configuration, the instantaneous emission reduction amount [g / sec] is calculated as follows: A reduction coefficient calculation means 19 that calculates the difference between the emission coefficient [kg / L] of diesel among the emission coefficients [kg / L] stored in the storage means 11 and the emission coefficient [kg / L] of the type of fuel identified by the fuel type identification means 12 as a reduction coefficient; This may also be achieved by providing an instantaneous emission reduction calculation means 18' which multiplies the instantaneous fuel consumption [L / sec] acquired by the instantaneous fuel consumption acquisition means 13 by the reduction coefficient [kg / L] calculated by the reduction coefficient calculation means 19 to calculate an instantaneous emission reduction [g / sec], which is the amount of carbon dioxide emission reduction per unit time (Claim 10: see Figure 6).

[0036] In both of the above carbon dioxide emission calculation devices 1, The device may further include an emission display means 15 that displays on a display device 40 the instantaneous emission amount [g / sec] calculated by the instantaneous emission amount calculation means 14 and / or the accumulated emission amount [g, kg, t], which is the accumulated value of the carbon dioxide emission amount from a predetermined starting point to the time when the latest instantaneous fuel consumption amount [L / sec] was obtained (Claim 11: see Figures 1, 4 and 6).

[0037] In addition, in a configuration provided with instantaneous emission reduction calculation means 18, 18', it is possible to further provide an emission reduction display means 15' that displays on a display device 40 the instantaneous emission reduction [g / sec] calculated by the instantaneous emission reduction calculation means 18, 18' and / or an accumulated emission reduction [g, kg, t], which is the accumulated value of the emission reduction from a specified starting point to the point in time when the latest instantaneous fuel consumption [L / sec] was obtained (Claim 12: see Figures 4 and 6). Effect of the Invention

[0038] With the configuration of the present invention described above, the present invention can provide the following significant effects.

[0039] Regardless of the type of fuel used in the engine-driven work machine, it is possible to automatically and accurately calculate / accumulate the instantaneous and / or accumulated carbon dioxide emissions of the engine-driven work machine, and by displaying this on a display device 40 such as a monitor, it is now possible to easily grasp the amount of carbon dioxide emissions.

[0040] In the past, when trying to accurately grasp the amount of carbon dioxide emissions from each engine-driven work machine, it was necessary to carry out the tedious and time-consuming task of recording the type of fuel used for each engine-driven work machine, the amount of fuel used, the amount of fuel remaining in the tank, etc., and then calculating the amount of carbon dioxide emissions.However, with the present invention, it is now possible to efficiently and accurately calculate the amount of carbon dioxide emissions from each engine-driven work machine without having to carry out such tedious and time-consuming work, and to use this information for reporting, compilation, etc.

[0041] The instantaneous fuel consumption [L / sec] used to calculate the instantaneous emission amount [g / sec], which is the amount of carbon dioxide emitted per unit time, can be obtained, for example, by installing a flow meter in the fuel supply system or by obtaining data from an engine control unit (ECU). However, by storing in advance in the memory means 11 the fuel consumption characteristics, which are the corresponding relationship between the change in instantaneous fuel consumption [L / sec] and the change in the load rate [%] of the work machine main body 30, and determining the instantaneous fuel consumption [L / sec] from this fuel consumption characteristic and the load rate [%] of the work machine main body 30, it is possible to calculate and display the amount of carbon dioxide emission without actually measuring the amount of fuel consumption per unit time.

[0042] In addition, in the conventional device configurations for calculating and displaying carbon dioxide emissions, as introduced in the above-mentioned Patent Documents 1 and 2, although there are some that calculate and display carbon dioxide emissions, there are no devices that calculate or display the amount of carbon dioxide emission reductions, and if one wishes to grasp the amount of emission reductions, additional complicated tabulation and calculation work is required.

[0043] However, the configuration of the present invention makes it possible to automatically calculate not only the amount of carbon dioxide emissions but also the amount of carbon dioxide emission reduction compared to the use of diesel, and furthermore makes it possible to display the calculated amount of emission reduction, making it possible to grasp the amount of carbon dioxide emission reduction without performing such complicated calculation work, making it easier for users of engine-driven working machinery to participate in the carbon credit system, and therefore providing an incentive for them to actively participate in efforts to combat global warming. [Brief description of the drawings]

[0044] [Figure 1] FIG. 2 is a functional block diagram of a carbon dioxide emission calculation device for an engine-driven working machine according to the present invention (a configuration example for only calculating the emission amount). [Diagram 2] FIG. 2 is an explanatory diagram of fuel consumption characteristics stored in a storage means (a correlation diagram between load factor and instantaneous fuel consumption for each fuel). [Diagram 3]FIG. 2 is a flow diagram showing the operation of the carbon dioxide emission calculation device of FIG. [Figure 4] FIG. 13 is a functional block diagram showing a modified example of the carbon dioxide emission calculation device for an engine-driven working machine according to the present invention (a configuration example that enables calculation of the emission reduction amount in addition to the emission amount). [Diagram 5] FIG. 5 is a flow diagram showing the operation of the carbon dioxide emission calculation device of FIG. 4. [Figure 6] FIG. 13 is a functional block diagram showing yet another modified example of the device for calculating carbon dioxide emissions for an engine-driven working machine according to the present invention (a configuration example that enables calculation of the amount of emission reduction in addition to the amount of emission). [Figure 7] FIG. 7 is a flow chart showing the operation of the carbon dioxide emission calculation device in FIG. 6. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0045] Hereinafter, a carbon dioxide emission calculation device 1 for an engine-driven working machine according to the present invention will be described with reference to the accompanying drawings.

[0046] [Target engine-driven working machines] The carbon dioxide emission calculation device 1 of the present invention is capable of targeting a variety of engine-driven work machines, without any particular limitation, so long as they are equipped with a diesel engine (not shown) and a work machine main body 30 driven by the engine. As an example, in this embodiment, the calculation of carbon dioxide emissions for an engine-driven generator equipped with a generator main body as the work machine main body 30 described above will be explained, but the engine-driven work machines for which carbon dioxide emissions are to be calculated are not limited to the engine-driven generator described above, and there is no particular limitation on the type, so long as they are equipped with a work machine main body driven by an engine, such as an engine-driven compressor equipped with a compressor main body as the work machine main body, or an engine-driven pump equipped with a pump.

[0047] In this embodiment, it is anticipated that the fuel used in these engine-driven work machines will be diesel, or one of the diesel alternative fuels selected from GTL fuel and B100 fuel, which will be selectively used depending on the situation; however, the types of fuel that can be selected are not limited to the above examples, and a greater or lesser range of fuels may be available for selection, and for example, B5 diesel, which is used as an alternative to diesel in the construction industry, may also be included.

[0048] In the above examples, "GTL fuel" is a diesel alternative fuel refined from natural gas, "B100 fuel" is 100% biodiesel fuel, and "B5 diesel" is diesel containing less than 5% biodiesel fuel.

[0049] [Basic configuration of the carbon dioxide emission calculation device] FIG. 1 shows a basic configuration of a carbon dioxide emission calculation device 1 for an engine-driven working machine according to the present invention.

[0050] The carbon dioxide emission calculation device 1 shown in Figure 1 is equipped with a memory means 11, a fuel type identification means 12, an instantaneous fuel consumption acquisition means 13, an instantaneous emission calculation means 14, and an emission amount display means 15, which are realized in an electronic control device (control device 10) such as a microcontroller, as described below.

[0051] (1) Storage means The above-mentioned storage means 11 stores the following information acquired in advance as information necessary for calculating the amount of carbon dioxide emissions.

[0052] (1-1) Emission factor The emission coefficient [kg / L] is a coefficient representing the amount of carbon dioxide emitted [kg] per specified amount (e.g., 1 L) of the fuel intended to be used in the engine-driven work machine, in this embodiment, diesel, GTL fuel, and B100 fuel, and is stored as information necessary for calculating the instantaneous emission [g / sec], which is the amount of carbon dioxide emitted per unit time (e.g., 1 second), calculated by the instantaneous emission calculation means 14 described later.

[0053] (1-2) Fuel consumption characteristics The fuel consumption characteristics define the amount of fuel consumed per unit time (e.g., 1 second) [L] as instantaneous fuel consumption [L / sec], and specify the correlation between changes in instantaneous fuel consumption [L / sec] for each type of fuel (diesel, GTL fuel, and B100 fuel) in response to changes in the load rate [%] of the engine-driven work machine's work machine body. Figure 2 shows an example of a graph of the fuel consumption characteristics for diesel, GTL fuel, and B100 fuel.

[0054] This fuel consumption characteristic is information required when the instantaneous fuel consumption obtained by the instantaneous fuel consumption obtaining means 13 described later is obtained by calculation based on the load rate [%] of the work machine main body 30 obtained by the load rate obtaining means 131 described later, and when the instantaneous fuel consumption [L / sec] described later is obtained, for example, by actual measurement using a flow meter installed in the fuel supply system or based on data obtained from the engine control unit (ECU), there is no need to store the above-mentioned fuel consumption characteristic in the memory means 11.

[0055] (1-3) Judgment criteria The judgment criterion is stored data of the judgment criterion value (threshold value) required for the fuel type identification means 12 described below to identify the type of fuel based on the detection signal from the fuel type detection means 20 provided in the fuel supply system.In the configuration of this embodiment in which an ultrasonic sensor is used as the fuel type detection means 20 to identify the type of fuel based on differences in the ultrasonic propagation speed of the fuel, the upper and lower limit values ​​of the ultrasonic propagation speed for each fuel are stored in the memory means 11 as the above-mentioned judgment criterion.

[0056] However, the identification of the fuel type is not limited to the use of an ultrasonic sensor, but may also be performed based on the differences in capacitance and thermal conductivity of each fuel using a capacitance sensor or thermal conductivity sensor, etc., in which case the upper and lower limits of the capacitance and the upper and lower limits of the thermal conductivity of each fuel are stored in the memory means 11 as the aforementioned judgment criteria.

[0057] Furthermore, two or more types of sensors may be provided as the fuel type detection means 20, and the fuel type may be identified based on a combination of multiple characteristics possessed by the fuel.In this case, two or more types of judgment criteria (threshold values) data are stored in the memory means 11 corresponding to the characteristics to be used in combination.

[0058] (2) Fuel type identification means The fuel type identification means 12 is a means for identifying the type of fuel being used in the engine-driven working machine, and determines the type of fuel being used by comparing the detection signal received from the fuel type detection means 20 provided in the fuel supply system with the determination criteria stored in the aforementioned memory means 11.

[0059] In the embodiment shown in FIG. 1, an ultrasonic sensor is provided as the fuel type detection means 20, and it is determined whether the fuel being used is diesel, GTL fuel, or B100 fuel based on the ultrasonic propagation speed of the fuel detected by the ultrasonic sensor. However, as described above, a capacitance sensor or a thermal conductivity sensor may be provided as the fuel type detection means 20 to determine the type of fuel based on differences in capacitance or thermal conductivity for each fuel. Furthermore, a plurality of types of sensors may be provided as the fuel type detection means 20, and the type of fuel may be determined based on a combination of detection signals from these sensors, thereby making it possible to more accurately determine the type of fuel.

[0060] (3) Instantaneous fuel consumption acquisition means The instantaneous fuel consumption acquisition means 13 identifies the fuel consumption per unit time (1 second as an example) of the engine-driven working machine by a method described later, and acquires the identified fuel consumption per unit time as the instantaneous fuel consumption [L / sec] at the time of identification. The instantaneous fuel consumption acquisition means 13 may identify the fuel consumption per unit time based on an actual measurement value by a flow sensor provided in a fuel supply system or data from an engine control unit (ECU) provided in the engine, and acquire this as the instantaneous fuel consumption [L / sec] described above, but in this embodiment, the instantaneous fuel consumption acquisition means 13 is further provided with a load factor acquisition means 131 and an instantaneous fuel consumption calculation means 132, which identify the fuel consumption per unit time based on calculation, and acquire the identified fuel consumption per unit time as the instantaneous fuel consumption [L / sec] described above.

[0061] (3-1) Load factor acquisition means The aforementioned load rate acquisition means 131 acquires the load rate [%] of the working machine main body 30 provided in the engine-driven working machine during operation. In this embodiment in which the working machine main body 30 is the generator main body, the load rate acquisition means 131 calculates and acquires the load rate [%] at the time of output of the generator main body (working machine main body 30) based on the output of the generator main body using the following formula. Load factor [%] = (output voltage x current x power factor) [kW] / rated value [kW]

[0062] The load factor acquisition means 131 may acquire the load factor by calculating the load factor of the work machine body 30 based on the operating state of the engine acquired from the ECU 35, for example, and is not limited to the above configuration.

[0063] (3-2) Instantaneous fuel consumption calculation method The instantaneous fuel consumption calculation means 132 calculates the instantaneous fuel consumption [L / sec], which is the fuel consumption per unit time, based on the fuel consumption characteristics corresponding to the type of fuel identified by the fuel type identification means 12 from the fuel consumption characteristics stored in the memory means 11 (see Figure 2) and the load factor [%] acquired by the load factor acquisition means 131.

[0064] As an example, assuming that the type of fuel identified by the fuel type identification means 12 is GTL fuel (the top graph in FIG. 2) and the load factor of the work machine body 30 acquired by the load factor acquisition means 131 is 60%, the instantaneous fuel consumption calculation means 132 calculates X [L / sec] (see FIG. 2) as the instantaneous fuel consumption based on the function of the fuel consumption characteristics of the GTL fuel stored in the memory means 11.

[0065] (4) Instantaneous emission calculation means The instantaneous emission amount calculation means 14 calculates the instantaneous emission amount [g / sec], which is the amount of carbon dioxide emitted per unit time, based on the emission coefficient [kg / L] corresponding to the type of fuel identified by the fuel type identification means 12, among the emission coefficients [kg / L] stored in the memory means 11, and the instantaneous fuel consumption [L / sec] acquired by the instantaneous fuel consumption acquisition means 13 (calculated by the instantaneous fuel consumption calculation means 132).

[0066] (5) Emission amount display means The emission amount display means 15 performs processing to display the instantaneous emission amount of carbon dioxide [g / sec] calculated by the instantaneous emission amount calculation means 14 on a display device 40 consisting of a monitor screen or the like provided on the instrument panel or the like of an engine-driven work machine.

[0067] The emission amount display means 15 may calculate an accumulated emission amount [g, kg, t], which is the accumulated value of the emission amount from a specified starting point to the point at which the latest instantaneous fuel consumption amount [L / sec] was obtained, together with, or instead of, the instantaneous emission amount [g / sec] calculated by the instantaneous emission amount calculation means 14, and display it on the display device 40.

[0068] In addition, the accumulated emissions [g, kg, t] may be calculated by accumulating the instantaneous emissions calculated by the instantaneous emissions calculation means 14 from a predetermined starting point to the time when the latest instantaneous fuel consumption [L / sec] was obtained, or the instantaneous fuel consumption [L / sec] obtained by the instantaneous fuel consumption acquisition means 13 described above may be accumulated from a predetermined starting point to the time when the latest instantaneous fuel consumption [L / sec] was obtained to obtain the accumulated fuel consumption, and this accumulated fuel consumption may be multiplied by the emission coefficient [L / sec] of the fuel in use, among the emission coefficients [kg / L] stored in the memory means 11, to obtain the accumulated emissions [g, kg, t].

[0069] This accumulated emission amount [g, kg, t] may be reset automatically at one or more timings, for example, hourly, daily, weekly, monthly, etc., depending on the user's settings or automatically, and the accumulation may start from a new starting point, thereby making it possible to grasp the amount of carbon dioxide emission, for example, hourly, daily, weekly, monthly, etc.

[0070] (6) Operation, etc. The operation of the carbon dioxide emission calculation device 1 for the engine-driven working machine of the present invention described above with reference to FIG. 1 will now be described with reference to FIG.

[0071] When the engine-driven working machine is started, the control device 10 executes a pre-stored program to activate the fuel type identification means 12 .

[0072] The fuel type identification means 12 compares the detection signal of the fuel type detection means (ultrasonic sensor) 20 with the judgment criteria stored in the memory means 11, and identifies whether the fuel being used in the engine-driven work machine is diesel, GTL fuel, or B100 fuel, i.e., identifies the fuel type (S101).

[0073] Based on this identification result, the instantaneous fuel consumption acquisition means 13 acquires the emission coefficient [kg / L] and fuel consumption characteristics of the type of fuel identified by the fuel type identification means from the memory means 11 (S102), and also activates the load factor acquisition means 131 to acquire the load factor [%] of the working machine main body 30 in operation (S103).

[0074] Then, the instantaneous fuel consumption acquisition means 13 further calculates the instantaneous fuel consumption [L / sec], which is the fuel consumption per unit time (e.g., 1 second), based on the fuel consumption characteristics of the fuel in use acquired from the memory means 11 by the instantaneous fuel consumption calculation means 132 and the load rate [%] acquired by the load rate acquisition means 131 (S104).

[0075] In this way, when the instantaneous fuel consumption acquisition means 13 acquires the instantaneous fuel consumption [L / sec], the instantaneous emission amount calculation means 14 calculates the instantaneous emission amount [g / sec], which is the amount of carbon dioxide emitted per unit time, based on the emission coefficient [kg / L] of the type of fuel identified by the fuel type identification means 12, among the emission coefficients stored in the memory means 11, and the instantaneous fuel consumption [L / sec] acquired by the instantaneous fuel consumption acquisition means 13 (S105).

[0076] When the instantaneous emission amount of carbon dioxide [g / sec] is calculated by the instantaneous emission amount calculation means 14 in this manner, the emission amount display means 15 performs processing to display the instantaneous emission amount calculated by the instantaneous emission amount calculation means 14 on a display device 40 such as a monitor screen provided on the instrument panel of the engine-driven work machine (S106).

[0077] The emission amount display means 15 may be configured to display, instead of or together with the instantaneous emission amount [g / sec] described above, the accumulated emission amount [g, kg, t], which is the accumulated value of the carbon dioxide emission amount from a specified starting point to the point at which the latest instantaneous fuel consumption amount [L / sec] was obtained, on the display device 40 (S106), and in this embodiment, it is possible to display both the instantaneous emission amount [g / sec] and the accumulated emission amount [g, kg, t] on the display device 40.

[0078] [Modification of Carbon Dioxide Emission Calculation Device] The carbon dioxide emission calculation device 1 described above with reference to Figures 1 and 3 has been described as an example configuration that enables calculation and display of the "emission amount" of carbon dioxide emitted by an engine-driven working machine.

[0079] In response to this, Figs. 4 and 5 show an example of the configuration of a carbon dioxide emission calculation device 1 that is capable of calculating and displaying the "emission reduction amount" of carbon dioxide in addition to the "emission amount" of carbon dioxide.

[0080] In the configuration of the carbon dioxide emission calculation device 1 in FIG. 4, the same reference numerals are used for means common to the carbon dioxide emission calculation device 1 in FIG.

[0081] In addition, in the flow chart shown in FIG. 5, common process numbers (three-digit numbers beginning with S) are used for processes common to the flow chart shown in FIG.

[0082] In the carbon dioxide emission calculation device 1 shown in FIG. 4, in addition to the various means described with reference to FIG.

[0083] (1) Reference instantaneous fuel consumption calculation means The standard instantaneous fuel consumption calculation means 16 calculates the standard instantaneous fuel consumption [L / sec], which is the instantaneous fuel consumption when the fuel being used is assumed to be diesel, based on the load factor [%] acquired by the load factor acquisition means 131 and the fuel consumption characteristics of diesel among the fuel consumption characteristics stored in the memory means 11.

[0084] (2) Means for calculating standard instantaneous emissions The standard instantaneous emission amount calculation means 17 calculates the standard instantaneous emission amount [g / sec], which is the amount of carbon dioxide emitted per unit time when the fuel is assumed to be diesel, based on the emission coefficient [kg / L] of diesel among the emission coefficients [kg / L] stored in the memory means 11 and the standard instantaneous fuel consumption [L / sec] calculated by the standard instantaneous fuel consumption calculation means 16.

[0085] (3) Means for calculating instantaneous emission reduction amount The instantaneous emission reduction calculation means 18 calculates the difference between the standard instantaneous emission amount [g / sec] calculated by the standard instantaneous emission amount calculation means 17 and the instantaneous emission amount [g / sec] calculated by the instantaneous emission amount calculation means 14 as the instantaneous emission reduction amount [g / sec].

[0086] (4) Emission reduction amount display means The emission reduction amount display means 15' performs processing to display the instantaneous emission reduction amount [g / sec] calculated by the instantaneous emission reduction amount calculation means 18 on a display device 40 such as a monitor.

[0087] The emission reduction amount display means 15' may, in addition to or instead of displaying the instantaneous emission reduction amount [g / sec] described above, calculate an accumulated emission reduction amount [g, kg, t], which is the accumulated value of the emission reduction amount [g / sec] from a specified starting point to the point at which the latest instantaneous fuel consumption amount [L / sec] was obtained, and display it on the display device 40.

[0088] In addition, the accumulated emission reduction amount [g, kg, t] can be obtained, for example, by accumulating the instantaneous emission reduction amount [g / sec] calculated by the instantaneous emission reduction amount calculation means 18 from a specified starting point to the most recently obtained instantaneous emission reduction amount [g / sec].

[0089] (5) Operation, etc. The operation of the carbon dioxide emission calculation device 1 described above with reference to FIG. 4 will now be described with reference to FIG.

[0090] When the engine-driven working machine is started, the fuel type identification means 12 in the control device 10 is activated and the fuel being used in the engine-driven working machine is identified as being any of diesel, GTL fuel, and B100 fuel (S101).

[0091] Based on this identification result, the instantaneous fuel consumption acquisition means 13 acquires, from the storage means 11, the emission coefficient [kg / L] and the fuel consumption characteristics corresponding to the type of fuel identified by the fuel type identification means (S102).

[0092] In parallel with this, the reference instantaneous fuel consumption calculation means 16 acquires the emission coefficient [kg / L] of diesel and the fuel consumption characteristics from the storage means 11 (S201).

[0093] The instantaneous fuel consumption obtaining means 13 further obtains the load factor [%] of the work machine body by the load factor obtaining means 131 (S103).

[0094] Thereafter, the instantaneous fuel consumption acquisition means 13 further determines the fuel consumption per unit time based on the fuel consumption characteristics of the fuel in use acquired from the memory means 11 by the instantaneous fuel consumption calculation means 132 and the load rate [%] acquired by the load rate acquisition means 131, and acquires the fuel consumption per unit time at the specified point in time as instantaneous fuel consumption [L / sec] (S104).

[0095] When the instantaneous fuel consumption [L / sec] is acquired by the instantaneous fuel consumption acquisition means 13 in this manner, the instantaneous emission amount calculation means 14 calculates the instantaneous emission amount [g / sec], which is the amount of carbon dioxide emitted per unit time, based on the instantaneous fuel consumption [L / sec] acquired by the instantaneous fuel consumption acquisition means 13 and the emission coefficient [kg / L] of the fuel in use acquired from the memory means 11 (S105).

[0096] On the other hand, the standard instantaneous fuel consumption calculation means 16 calculates the standard instantaneous fuel consumption [L / sec], which is the fuel consumption per unit time at the load rate [%] assuming that the fuel is diesel, based on the load rate [%] acquired by the load rate acquisition means 131 and the fuel consumption characteristics of diesel acquired from the memory means 11 (S202).

[0097] In addition, the standard instantaneous emission amount calculation means 17 calculates the standard instantaneous emission amount [g / sec], which is the amount of carbon dioxide emitted per unit time assuming that the fuel is diesel, based on the standard instantaneous fuel consumption [L / sec] calculated by the standard instantaneous fuel consumption calculation means 16 and the emission coefficient of diesel [kg / L] obtained from the memory means 11 (S203).

[0098] In this way, the instantaneous emission amount [g / sec] is calculated by the instantaneous emission amount calculation means 14, and the standard instantaneous emission amount [g / sec] is calculated by the standard instantaneous emission amount calculation means 17.The difference between the standard instantaneous emission amount [g / sec] and the instantaneous emission amount [g / sec] is then calculated as the instantaneous emission reduction amount [g / sec] by the instantaneous emission amount calculation means 18 (S204).

[0099] The instantaneous emission amount [g / sec] of carbon dioxide calculated by the instantaneous emission amount calculation means 14, preferably the instantaneous emission amount [g / sec] and the accumulated emission amount [g, kg, t] calculated separately are displayed on a display device 40 such as a monitor screen by the emission amount display means 15, and the instantaneous emission reduction amount [g / sec] calculated by the instantaneous emission reduction amount calculation means 18, preferably the instantaneous emission reduction amount [g / sec] and the accumulated emission reduction amount [g, kg, t] calculated separately together are displayed on a display device 40 such as a monitor screen by the emission reduction amount display means 15' (S205), and the processing is completed.

[0100] [Other Modifications] In the embodiment described above with reference to Figures 4 and 5, the standard instantaneous fuel consumption [L / sec], which is the fuel consumption per unit time when assuming that the fuel is light oil, is calculated, and this standard instantaneous fuel consumption [L / sec] is multiplied by the emission coefficient of light oil [kg / L] to obtain the standard instantaneous emission amount [g / sec].Furthermore, the difference between this standard instantaneous emission amount [g / sec] and the instantaneous emission amount [g / sec] is calculated as the instantaneous emission reduction amount [g / sec].

[0101] In contrast, in the embodiment shown in Figures 6 and 7, the difference between the emission coefficient [kg / L] of light oil among the emission coefficients [kg / L] stored in the memory means 11 and the emission coefficient [kg / L] of the fuel identified by the fuel type identification means 12 is calculated as a reduction coefficient [kg / L], and the instantaneous fuel consumption [L / sec] acquired by the instantaneous fuel consumption acquisition means 13 is multiplied by the aforementioned reduction coefficient [kg / L] to obtain the instantaneous emission reduction amount [g / sec].

[0102] In the configuration of the carbon dioxide emission calculation device 1 in FIG. 6, the same reference numerals are used for means common to the carbon dioxide emission calculation device 1 in FIG.

[0103] In addition, in the flow chart shown in FIG. 7, common process numbers (three-digit numbers beginning with S) are used for processes common to the flow chart shown in FIG.

[0104] As is clear from a comparison of FIG. 4 and FIG. 6, the carbon dioxide emission calculation device 1 shown in FIG. 6 has the following changes from the configuration of the carbon dioxide emission display device 1 shown in FIG.

[0105] The carbon dioxide emission display device 1 shown in Figure 4 is provided with a standard instantaneous fuel consumption calculation means 16 and a standard instantaneous emission amount calculation means 17, whereas the carbon dioxide emission calculation device 1 shown in Figure 6 does not have the standard instantaneous fuel consumption calculation means 16 and the standard instantaneous emission amount calculation means 17, and instead has a reduction coefficient calculation means 19, which calculates the difference between the emission coefficient [kg / L] of light oil among the emission coefficients [kg / L] stored in the memory means 11 and the emission coefficient [kg / L] of the fuel identified by the fuel type identification means 12 as the reduction coefficient [kg / L] (see S301 in Figure 7).

[0106] In addition, while the carbon dioxide emission calculation device 1 shown in Figure 4 has an instantaneous emission reduction calculation means 18 that calculates the difference between the standard instantaneous emission amount [g / sec] calculated by the standard instantaneous emission amount calculation means 17 and the instantaneous emission amount [g / sec] calculated by the instantaneous emission amount calculation means 14 as the instantaneous emission reduction amount [g / sec], the instantaneous emission reduction calculation means 18' of the carbon dioxide emission calculation device 1 shown in Figure 6 differs in that it multiplies the instantaneous fuel consumption [L / sec] obtained by the instantaneous fuel consumption acquisition means 13 (calculated by the instantaneous fuel consumption calculation means 132) by the reduction coefficient [kg / L] calculated by the reduction coefficient calculation means 19 to calculate the instantaneous emission reduction amount [g / sec] (see S302 in Figure 7).

[0107] The other points are the same as those in the embodiment described above with reference to FIGS. 4 and 5, and therefore the description thereof will be omitted. [Explanation of symbols]

[0108] 1. Carbon dioxide emission calculation device 10 Control device (electronic control device) 11 Memory means 12 Fuel type identification means 13 Means for obtaining instantaneous fuel consumption 131 Load factor acquisition means 132 Instantaneous fuel consumption calculation method 14 Instantaneous emission calculation method 15 Emission amount display means 15' Emission reduction amount display means 16 Reference instantaneous fuel consumption calculation method 17 Standard instantaneous emissions calculation method 18,18' Instantaneous emission reduction calculation method 19 Reduction factor calculation method 20 Fuel type detection means (ultrasonic sensor) 30 Work machine body 35 ECU 40 Display device

Claims

1. A method for calculating carbon dioxide emissions from an engine-driven work machine that is equipped with a diesel engine and a work machine body driven by the engine and that is operated using any one type of fuel selected from diesel and diesel alternative fuels, providing a storage means for storing an emission coefficient, which is the amount of carbon dioxide emitted per a predetermined amount of fuel and a judgment criterion required for judging the type of fuel, which is previously acquired for each type of usable fuel; a fuel type identification process for identifying the type of fuel being used by comparing a detection signal from a fuel type detection means provided at any position in a fuel supply system with the judgment criteria stored in the storage means; and an instantaneous fuel consumption acquisition process for identifying the fuel consumption per unit time and acquiring it as the instantaneous fuel consumption at the specific time point. an instantaneous emission calculation process for calculating an instantaneous emission amount, which is an amount of carbon dioxide emitted per unit time, based on the emission coefficient of the type of fuel identified in the fuel type identification process among the emission coefficients stored in the storage means and the instantaneous fuel consumption amount; A method for calculating carbon dioxide emissions from an engine-driven working machine, comprising:

2. the storage means stores, as a fuel consumption characteristic, a correspondence relationship between a change in the instantaneous fuel consumption amount and a change in the load factor of the work machine body for each type of usable fuel, which has been acquired in advance; The instantaneous fuel consumption acquisition process further comprises: A load rate acquisition process for acquiring a load rate of the work machine body; an instantaneous fuel consumption calculation process for calculating the instantaneous fuel consumption based on the fuel consumption characteristics of the type of fuel identified in the fuel type identification process among the fuel consumption characteristics stored in the storage means and the load factor acquired in the load factor acquisition process; 2. The method for calculating carbon dioxide emission amount of an engine-driven working machine according to claim 1, further comprising:

3. A process of calculating a reference instantaneous fuel consumption amount, which is an instantaneous fuel consumption amount assuming that the fuel being used is diesel fuel, based on the load factor acquired in the load factor acquisition process and the fuel consumption characteristic of diesel fuel among the fuel consumption characteristics stored in the storage means; A process of calculating a standard instantaneous emission amount, which is the amount of carbon dioxide emitted per unit time assuming that the fuel is diesel, based on the emission coefficient of diesel among the emission coefficients stored in the storage means and the standard instantaneous fuel consumption amount; The carbon dioxide emission calculation method for an engine-driven working machine as described in claim 2, further comprising a process of calculating the difference between the standard instantaneous emission amount and the instantaneous emission amount as an instantaneous emission reduction amount, which is the carbon dioxide emission reduction amount per unit time.

4. A process of calculating the difference between the emission coefficient of diesel among the emission coefficients stored in the storage means and the emission coefficient of the type of fuel identified in the fuel type identification process as a reduction coefficient; The carbon dioxide emission calculation method for an engine-driven working machine as described in claim 2, further comprising a process of multiplying the instantaneous fuel consumption obtained in the instantaneous fuel consumption acquisition process by the reduction coefficient to calculate an instantaneous emission reduction amount, which is the amount of carbon dioxide emission reduction per unit time.

5. A method for calculating carbon dioxide emissions from an engine-driven working machine as described in any one of claims 1 to 4, further comprising an emission display process for displaying on a display device the instantaneous emission amount acquired in the instantaneous emission acquisition process and / or an accumulated emission amount, which is the accumulated value of the carbon dioxide emission amount from a specified starting point to the point at which the latest instantaneous fuel consumption amount was acquired.

6. The carbon dioxide emission calculation method for an engine-driven working machine as described in claim 3 or 4, further comprising an emission reduction display process for displaying on a display device the instantaneous emission reduction calculated in the instantaneous emission reduction calculation process and / or an accumulated emission reduction, which is the accumulated value of the emission reduction from a specified starting point to the point at which the latest instantaneous fuel consumption is obtained.

7. A carbon dioxide emission calculation device for an engine-driven work machine that is equipped with a diesel engine and a work machine body driven by the engine and that is operated using any one type of fuel selected from diesel and diesel alternative fuels, A storage means for storing an emission coefficient, which is an amount of carbon dioxide emitted per a predetermined amount of fuel, acquired in advance for each type of usable fuel, and a judgment criterion required for judging the type of fuel; a fuel type identification means for identifying the type of fuel being used by comparing a detection signal from a fuel type detection means provided at any position in a fuel supply system with the judgment criteria stored in the storage means; An instantaneous fuel consumption acquisition means for identifying a fuel consumption per unit time and acquiring the instantaneous fuel consumption at the specific time point; an instantaneous emission calculation means for calculating an instantaneous emission amount, which is an amount of carbon dioxide emitted per unit time, based on the emission coefficient of the type of fuel identified by the fuel type identification means among the emission coefficients stored in the storage means and the instantaneous fuel consumption amount; A carbon dioxide emission calculation device for an engine-driven working machine, comprising:

8. the storage means stores, as a fuel consumption characteristic, a correspondence relationship between a change in the instantaneous fuel consumption amount and a change in the load factor of the work machine body for each type of usable fuel, which has been acquired in advance; The instantaneous fuel consumption acquisition means further comprises: A load factor acquisition means for acquiring a load factor of the work machine body; an instantaneous fuel consumption calculation means for calculating the instantaneous fuel consumption based on the fuel consumption characteristics of the type of fuel identified by the fuel type identification means among the fuel consumption characteristics stored in the storage means and the load factor acquired by the load factor acquisition means; 8. The carbon dioxide emission calculation device for an engine-driven working machine according to claim 7, further comprising:

9. A reference instantaneous fuel consumption calculation means for calculating a reference instantaneous fuel consumption amount, which is an instantaneous fuel consumption amount assuming that the fuel being used is diesel fuel, based on the load factor acquired by the load factor acquisition means and the fuel consumption characteristic of diesel fuel among the fuel consumption characteristics stored in the storage means; A standard instantaneous emission amount calculation means for calculating a standard instantaneous emission amount, which is the amount of carbon dioxide emitted per unit time assuming that the fuel is diesel, based on the emission coefficient of diesel among the emission coefficients stored in the storage means and the standard instantaneous fuel consumption calculated by the standard instantaneous fuel consumption calculation means; The carbon dioxide emission calculation device for an engine-driven working machine as described in claim 8, further comprising an instantaneous emission reduction calculation means for calculating the difference between the standard instantaneous emission amount calculated by the standard instantaneous emission amount calculation means and the instantaneous emission amount calculated by the instantaneous emission amount calculation means as an instantaneous emission reduction amount, which is the carbon dioxide emission reduction amount per unit time.

10. A reduction coefficient calculation means for calculating the difference between the emission coefficient of diesel among the emission coefficients stored in the storage means and the emission coefficient of the type of fuel identified by the fuel type identification means as a reduction coefficient; The carbon dioxide emission calculation device for an engine-driven working machine as described in claim 7, further comprising an instantaneous emission reduction calculation means for multiplying the instantaneous fuel consumption acquired by the instantaneous fuel consumption acquisition means by the reduction coefficient calculated by the reduction coefficient calculation means to calculate an instantaneous emission reduction amount, which is the amount of carbon dioxide emission reduction per unit time.

11. A carbon dioxide emission calculation device for an engine-driven working machine as described in any one of claims 7 to 10, further comprising an emission display means for displaying on a display device the instantaneous emission amount calculated by the instantaneous emission calculation means and / or an accumulated emission amount, which is the accumulated value of the carbon dioxide emission amount from a predetermined starting point to the point at which the latest instantaneous fuel consumption amount is obtained.

12. The carbon dioxide emission calculation device for an engine-driven working machine as described in claim 9 or 10, further comprising an emission reduction display means for displaying on a display device the instantaneous emission reduction calculated by the instantaneous emission reduction calculation means and / or an accumulated emission reduction, which is the accumulated value of the emission reduction from a specified starting point to the point at which the latest instantaneous fuel consumption is obtained.

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