JP2009013938A - Fuel economy evaluation device and fuel economy evaluation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To more accurately evaluate fuel economy based on universal ideal fuel consumption rate. <P>SOLUTION: In this fuel economy evaluation device 10a, a fuel consumption rate evaluation process part 11e divides actual fuel consumption rate (liter/km) based on universal fuel consumption rate (liter/km) not depending on drivers by ideal fuel consumption rate (liter/km) calculated based on similarly universal fuel consumption rate (liter/km), multiplies the quotient by 100 to calculate percentage of the actual fuel consumption rate (liter/km) to the ideal fuel consumption rate (liter/km), and evaluates the actual fuel consumption rate (liter/km). A drive of a vehicle 1 can obviously recognize how good economical travel its own drive achieves. Since fuel economy can be evaluated with universal unified standard regardless with types of vehicles, fuel economy can be compared among different vehicle kinds and among different drivers. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fuel efficiency evaluation apparatus and a fuel efficiency evaluation method for evaluating fuel efficiency in running of a vehicle, and in particular, fuel efficiency that enables more accurate fuel efficiency evaluation based on an ideal fuel consumption rate having universality. The present invention relates to an evaluation device and a fuel consumption evaluation method.

  In recent years, from the viewpoint of protecting the global environment and protecting resources, there is a growing awareness of further reducing the fuel consumed by driving a vehicle. By knowing the ideal minimum amount of fuel consumed under certain driving conditions, the vehicle driver can be a reference for efforts to further reduce fuel consumption. For this reason, for example, Patent Document 1 evaluates the quality of driving of a vehicle by predicting an ideal fuel consumption rate of the vehicle using a parameter correlated with a road condition on which the vehicle is traveling as an input parameter. A vehicle fuel consumption rate predicting apparatus that can be used is disclosed.

  Further, in Patent Document 2, in a car navigation apparatus that guides a route of a vehicle, a route that consumes the least amount of fuel of the vehicle is selected and presented to a driver among routes from a departure point to a destination point. A car navigation device is disclosed. According to this car navigation device, it is possible to reach the destination with a minimum amount of fuel.

JP 2006-118479 A JP 2005-172582 A

  However, in the conventional technique represented by the above-mentioned Patent Document 1, the predicted ideal fuel consumption rate is calculated based on the input parameter indicating the driving attribute of the driver. The ideal fuel consumption rate included personal elements, and there was a question of universality.

  That is, an ideal fuel consumption rate is calculated using the average vehicle speed, the stop frequency, and the idling ratio as input parameters to the fuel consumption rate prediction model as the driving state of the vehicle by the driver. However, if the input parameters have universality (that is, the input parameters are universal values regardless of who operates in any time zone), an ideal universal fuel consumption rate is output. , Because the input parameter is personal to the driver, it has no universality, so the ideal fuel consumption rate calculated based on the input parameter without the universality is also universal Therefore, it could not be adopted as a standard for fuel economy evaluation.

  The present invention has been made in order to solve the above problems (problems), and can perform more accurate fuel efficiency evaluation based on an ideal fuel consumption rate having universality. An object is to provide a device and a fuel consumption evaluation method.

  In order to solve the above-described problems and achieve the object, the present invention is a fuel efficiency evaluation device for evaluating the fuel efficiency in traveling of a vehicle, in which the distance of a road section on which the vehicle is traveling and the road section Obtaining a standard value of the vehicle speed of travel of the vehicle, based on the distance of the section of the road and the minimum amount of fuel consumed for the vehicle to travel a predetermined unit distance at the standard value of the vehicle speed, A minimum fuel consumption calculating means for calculating a minimum amount of fuel consumed by the vehicle traveling on the road section; and calculating an actual fuel consumption consumed by the vehicle for actually traveling on the road section. The vehicle based on the actual fuel consumption calculating means, the minimum amount of the fuel calculated by the minimum fuel consumption calculating means, and the actual fuel consumption calculated by the actual fuel consumption calculating means. Section of the road And having a fuel consumption evaluation means for evaluating the fuel economy in traveling.

  Further, the present invention is characterized in that, in the above invention, the distance of the road section on which the vehicle is traveling and the standard value of the vehicle speed of traveling in the road section are acquired from outside the vehicle by wireless communication. And

  Further, the present invention is characterized in that, in the above-mentioned invention, further comprises storage means for previously storing a distance of a road section on which the vehicle is traveling and a standard value of the vehicle speed of traveling in the road section. To do.

  Further, the present invention is the above invention, wherein in the above invention, at least one of gradient detection means for detecting a gradient of a road on which the vehicle travels and mounting detection means for detecting a passenger boarding the vehicle or cargo loaded on the vehicle. And the vehicle according to the gradient detected by the gradient detection means or the loaded weight of the passenger or the cargo estimated based on the detection of the passenger or the cargo by the loading detection means. Correct the minimum amount of fuel consumed for traveling the predetermined unit distance at the standard value of the vehicle speed and the minimum amount of fuel required for the vehicle to travel the predetermined unit distance at the actual vehicle speed. A fuel minimum amount correcting means, wherein the fuel efficiency evaluation means is based on the minimum amount of fuel and the actual fuel consumption corrected by the fuel minimum amount correction means. And evaluating the fuel economy in the running of the road section of.

  Further, in the present invention, in the above invention, the fuel efficiency evaluation of the vehicle traveling on the road section by the fuel efficiency evaluation means is reported using a display device that displays the vehicle so that the vehicle can be visually recognized without any trouble. It further has a notifying means.

  Further, the present invention is a fuel consumption evaluation method for evaluating fuel consumption in traveling of a vehicle, and obtains a standard value of a distance of a road section on which the vehicle is traveling and a vehicle speed of the vehicle traveling in the road section. In order for the vehicle to travel the road section based on the distance of the road section and the minimum amount of fuel consumed for the vehicle to travel a predetermined unit distance at the standard value of the vehicle speed. A minimum fuel consumption calculating step for calculating a minimum amount of fuel to be consumed, an actual fuel consumption calculating step for calculating an actual fuel consumption consumed by the vehicle for actually traveling on a section of the road, and the minimum Based on the minimum amount of fuel calculated by the fuel consumption calculation step and the actual fuel consumption calculated by the actual fuel consumption calculation step, the fuel consumption of the vehicle in the road section is calculated. Worthy characterized in that it includes a fuel consumption evaluation step.

  According to the present invention, the amount of fuel actually consumed in traveling on the road section on which the vehicle is traveling is evaluated based on the minimum amount of fuel required for traveling on the road section. It is possible to know an objective evaluation of the fuel consumption of the driver's own driving and to promote the driver's efforts to improve the fuel consumption.

  Further, according to the present invention, the fuel efficiency evaluation device acquires the distance of the road section on which the vehicle is traveling and the standard value of the vehicle speed of travel in the road section from outside the vehicle by wireless communication. The minimum fuel consumption calculation means can always perform calculation processing based on new information, and the fuel consumption evaluation means can always perform evaluation based on new information.

  Further, according to the present invention, since the fuel consumption evaluation device stores in advance the distance of the road section on which the vehicle is traveling and the standard value of the vehicle speed of travel in the road section, the minimum fuel consumption calculating means In addition, there is an effect that the actual fuel consumption amount calculating means can perform the calculation process quickly.

  In addition, according to the present invention, the vehicle is responsive to the gradient detected by the gradient detection means or the weight of the passenger or the cargo estimated based on the detection of the passenger or the cargo by the loading detection means. Since the minimum amount of fuel consumed for traveling a predetermined unit distance at the standard value of the vehicle speed and the minimum amount of fuel necessary for the vehicle to travel a predetermined unit distance at the actual vehicle speed are corrected, the gradient Alternatively, there is an effect that the fuel consumption in traveling on the road section of the vehicle can be correctly evaluated by excluding the influence of the mounted weight.

  Further, according to the present invention, it is possible to display the evaluation of the fuel consumption so that the vehicle can be visually recognized without any trouble, and the driver can easily and surely recognize it without moving the line of sight from the front view.

  Exemplary embodiments according to a fuel efficiency evaluation apparatus and a fuel efficiency evaluation method of the present invention will be described below in detail with reference to the accompanying drawings.

  First, the structure of the fuel consumption evaluation apparatus according to the embodiment will be described. FIG. 1 is a functional block diagram illustrating the configuration of the fuel efficiency evaluation apparatus according to the embodiment. As shown in the figure, a fuel efficiency evaluation apparatus 10a according to an embodiment includes a car navigation apparatus, a VICS (registered trademark) information reception apparatus, and a DCM (Data Communication Module) in a vehicle 1 via a CAN (Controller Area Network) 100. A road information acquisition device 20 such as a DSRC (Dedicated Short Range Communication) device, a fuel consumption detection device 30a that detects the amount of fuel actually consumed by the vehicle 1 traveling, and a gradient detection device 30b that is a gradient detection sensor; The passenger / loaded cargo detection device 40, which is a seat sensor or a loaded cargo sensor, and an engine control device 50 that controls fuel supply to the engine of the vehicle 1 are connected to each other so as to be able to communicate with each other.

  The engine control device 50 stores a fuel consumption by associating and storing a vehicle speed based on the performance of the vehicle 1 and a fuel consumption rate [liter / km] which is a minimum fuel amount consumed per 1 km at the vehicle speed. The quantity rate table 50a is stored. The fuel consumption rate [liter / km] is a minimum required amount of fuel per one kilometer travel obtained by a numerical value calculated theoretically based on the attributes of the vehicle 1 or by an experiment.

  The fuel efficiency evaluation apparatus 10a includes a control unit 11 that is a control unit such as a microcomputer including a ROM (Read Only Memory) that stores a program code that defines a predetermined processing procedure, and a volatile storage unit or a non-volatile storage unit. And a display unit 13 which is a display means such as a display device. The control unit 11 is responsible for overall control of the fuel efficiency evaluation apparatus 10a, but as an element related particularly to the embodiment, an ideal fuel consumption calculation unit 11a, an actual fuel consumption calculation unit 11b, and a corrected ideal fuel consumption calculation unit. 11c, a fuel consumption rate calculation unit 11d, a fuel consumption rate evaluation processing unit 11e, and a fuel consumption rate evaluation result display control unit 11f.

  The ideal fuel consumption calculation unit 11a converts an ideal fuel consumption rate acquired from a fuel consumption rate table 50a described later and road information described later acquired from the outside of the vehicle 1 via the road information acquisition device 20. Based on the ideal fuel consumption [liter] consumed in the section of the road on which the vehicle 1 is traveling.

  An example of the ideal fuel consumption rate is as shown in FIG. FIG. 2 is a diagram illustrating an example of the fuel consumption rate table 50a. The fuel consumption rate table 50a is stored in a predetermined nonvolatile storage means such as a ROM of the engine control device 50. In the fuel consumption rate table 50a, the fuel consumption rate [liter / km] is associated with each speed [k / m] and stored. The speed [k / m] is the vehicle speed of the vehicle 1. The fuel consumption rate [liter / km] is a universal fuel consumption rate that is the same as long as the vehicle is the same model as the vehicle 1 even if the vehicle is driven by any driver.

For example, referring to FIG. 2, when the speed is 0 [km / h] to 10 [km / h] (greater than 0 [km / h] and less than 10 [km / h]), the fuel consumption rate [Liter / km] is a ₁ [liter / km]. Similarly, when the speed is 10 [km / h] to 20 [km / h] (more than 10 [km / h] and less than 20 [km / h]), the fuel consumption rate [liter / km] is , A ₂ [liter / km]. Similarly, when the speed is 190 [km / h] to 200 [km / h] (190 [km / h] or more and less than 200 [km / h]), the fuel consumption rate [liter / km] is , A ₂₀ [liter / km]. Thus, the fuel consumption rate [liter / km] is associated and stored for all the assumed speeds.

  Here, the section of the road on which the vehicle 1 is traveling is the same as the road from the departure point where the vehicle 1 departs to the destination point, with a change in road attribute (for example, average traveling speed, etc.) as a break. This refers to the section divided into sections with road attributes. The starting point and destination point here are the starting point and ending point of the daily operation of the vehicle 1, the starting point and destination point of the vehicle 1 trip, or the current point and destination point where the route search is performed by the car navigation device. Any of these may be used.

An example of a road section is as shown in FIG. FIG. 3 is a diagram illustrating an example of road information. That is, the section name section _{S 1,} section _S 2, · · ·, section _S 20, · · · is a section each section distance [km] is _{L 1, L 2, ···,} L 20, ·· The average travel speed [km / h] is, for example, 30, 55,. Here, the average travel speed [km / h] is a universal vehicle speed that is substantially the same even if the section is driven by any driver at the time. The road information is information on a section name, a section distance [km], and an average traveling speed [km / h] for all road sections. Therefore, the road information is universal information that does not depend on the driver. The road information is obtained in real time from the outside of the vehicle 1 by wireless communication via the road information acquisition device 20.

  The actual fuel consumption amount calculation unit 11b calculates the actual fuel consumption amount [liter] consumed in traveling on the road section on which the vehicle 1 has traveled, based on the fuel consumption amount acquired from the fuel consumption detection device 30a. . In addition, the section of the road said here is the same as the above-mentioned content.

  The corrected ideal fuel consumption calculation unit 11c calculates the fuel consumption rate [liter / km] obtained from the fuel consumption rate table 50a, the gradient of the current position of the vehicle 1, and the weight of the passenger / loaded cargo of the vehicle 1. And the ideal fuel consumption [liter] calculated by the ideal fuel consumption calculation unit 11a is corrected based on the corrected fuel consumption rate [liter / km]. To do.

  If the current position of the vehicle 1 is a slope, it is clear that the slope affects the fuel consumption rate [liter / km] when the vehicle 1 is traveling. If the correction coefficient for correcting the influence is α and the ideal fuel consumption rate before correction is a, the corrected fuel consumption rate [liter / km] is α × a [liter / km]. Here, as a calculation example of α, there is the following method.

That is, when the inertial mass of the vehicle 1 used when obtaining the fuel consumption rate [liter / km] before correction is M [kg], the vehicle 1 climbs an uphill with an inclination angle θ [rad]. , the traveling direction of the vehicle 1 forces M × g × sinθ backwards [kg × km × h ^2] is applied (here, "g" is the gravitational acceleration, [kg × km × h ^2] of "h "Stands for" 1 hour "). That is, when the vehicle 1 climbs an uphill with an inclination angle θ [rad], an inertia mass of M × sin θ is added to the inertia mass when traveling on a plane. Therefore, since it is considered that the fuel consumption rate [liter / km] is proportional to the inertial mass, when α = 1 + sin θ, the corrected fuel consumption rate [liter / km] is α × a [liter / km]. Become. Further, when the vehicle 1 goes down a downhill with an inclination angle θ [rad], α = 1 + sin (−θ) = 1−sin θ may be set. However, this calculation method is only an example.

  The method of detecting the gradient is not based on the gradient detection device 30b, but based on information related to the gradient included in the map information acquired via the road information acquisition device 20 such as a car navigation device. Also good.

  It is also clear that when the weight of the passenger of the vehicle 1 and the loaded cargo cannot be ignored, the weight affects the fuel consumption rate [liter / km] when the vehicle 1 is traveling. If the correction coefficient for correcting the influence is β and the fuel consumption rate before correction is a, the corrected fuel consumption rate [liter / km] is β × a [liter / km]. Here, as an example of calculating β, there is the following method.

That is, since it is considered that the fuel consumption rate [liter / km] is proportional to the weight of the vehicle 1, the weight of the vehicle 1 used when obtaining the fuel consumption rate [liter / km] before correction is defined as M ₁ [ kg], where M ₂ is the weight of the vehicle 1 including the weight of the passenger and the loaded cargo, β = M ₂ / M ₁ . However, this calculation method is only an example.

  When a (fuel consumption rate) [liter / km] is corrected by the correction coefficients α and β, α × β × a [liter / km] is obtained.

  The fuel consumption rate calculation unit 11d sums the ideal fuel consumption [liter] for each section of the road calculated by the ideal fuel consumption calculation unit 11a for all sections from the departure point to the destination point. Divide [liter] by the distance from the starting point to the destination point to calculate the ideal fuel consumption rate [liter / km]. Further, the fuel consumption rate calculation unit 11d adds the actual fuel consumption rate [liter / km] for each section of the road calculated by the actual fuel consumption calculation unit 11b for all the sections from the departure point to the destination point. The actual fuel consumption rate [liter / km] is calculated by dividing the actual fuel consumption total amount [liter] by the distance from the starting point to the destination point.

  The fuel consumption rate evaluation processing unit 11e uses the actual fuel consumption rate [liter / km] calculated by the fuel consumption rate calculation unit 11d as the ideal fuel consumption rate calculated by the fuel consumption rate calculation unit 11d. By dividing by [liter / km] and multiplying by 100, the percentage of the actual fuel consumption rate [liter / km] with respect to the ideal fuel consumption rate [liter / km] is calculated and the actual fuel consumption rate [liter] / Km].

  If this percentage is 100%, it indicates that the actual fuel consumption rate [liter / km] matches the ideal fuel consumption rate [liter / km]. If this percentage is less than 100%, the actual fuel consumption rate [liter / km] is inferior to the ideal fuel consumption rate [liter / km], and the vehicle 1 is ideally saved. Indicates that the vehicle is not fuel efficient. If this percentage is greater than 100%, the actual fuel consumption rate [liter / km] will be superior to the ideal fuel consumption rate [liter / km], and the vehicle 1 will travel ideally. It indicates that the fuel consumption is exceeding the limit.

  Note that, in the above, the fuel consumption rate evaluation processing unit 11e divides the actual fuel consumption rate [liter / km] by the ideal fuel consumption rate [liter / km] and multiplies by 100 to thereby obtain the ideal fuel consumption. The percentage of the actual fuel consumption rate [liter / km] with respect to the quantity rate [liter / km] is calculated, but the present invention is not limited to this. That is, the total actual fuel consumption [liter] calculated by the fuel consumption rate calculation unit 11d is divided by the ideal total fuel consumption [liter] calculated by the fuel consumption rate calculation unit 11d. The total actual fuel consumption [liter] may be evaluated by calculating a percentage of the total actual fuel consumption [liter] with respect to [liter].

  If this percentage is 100%, it means that the total actual fuel consumption [liter] matches the ideal total fuel consumption [liter]. Further, if this percentage is less than 100%, the total actual fuel consumption [liter] is superior to the ideal total fuel consumption [liter], and the vehicle 1 travels more than ideal and consumes less fuel. It shows that. If this percentage is larger than 100%, the total actual fuel consumption [liter] is inferior to the ideal total fuel consumption [liter], and the vehicle 1 is not ideally fuel-efficient. Show.

  The fuel consumption rate evaluation result display control unit 11f is a percentage of the actual fuel consumption rate [liter / km] with respect to the ideal fuel consumption rate [liter / km] calculated by the fuel consumption rate evaluation processing unit 11e (or Control is performed so that the driver of the vehicle 1 can display the actual fuel consumption amount [liter] with respect to the ideal fuel consumption amount [liter]) on the display screen of the display unit 13 so that the driver of the vehicle 1 can effectively and easily see it.

The storage unit 12 stores a fuel consumption accumulation storage table 12a. For example, as shown in FIG. 4, the fuel consumption accumulation storage table 12 a has a section distance [km] and an ideal fuel consumption for every travel section included from the departure point to the destination point of the vehicle 1. It is a table which memorizes [liter] and actual fuel consumption [liter]. The total L [km] of the interval distance [km] from the departure point to the destination point, the ideal fuel consumption [l] Total T _{1 [liter]} of the total T _{2 [l]} of the actual fuel consumption [l] Remember. Note that L [km], T ₁ [liter], and T ₂ [liter] are values calculated and updated by the fuel consumption rate calculation unit 11d every time the traveling of each traveling section is completed. Based on these data, the fuel consumption rate calculation unit 11d calculates the ideal fuel consumption rate [liter / km] and the actual fuel consumption total amount [liter].

Referring to FIG. 4, for example, section S ₁ , section S ₂ , section S ₆ , section S ₉ , section S ₁₁ , section S ₁₄ , section S ₁₅ , section S ₁₈ , and section S ₂₀ are listed as travel sections. Yes. This indicates that the travel route from the departure point to the destination point includes these sections. Based on the road information acquired via the road information acquisition device 20, it can be seen that the section distance [km] of the section S ₁ is L ₁ and the average traveling speed [km / h] is 30 [km / h]. still referring to fuel consumption rate table 50a, if the average travel speed [km / h] is 30 [km / h] is the ideal fuel consumption rate [l / miles] is found to be a _4.

Thus, the ideal fuel consumption calculating portion 11a, the ideal fuel consumption of the interval _{S 1} [l] is calculated to be _{a 4} × _{L 1.} Further, the actual fuel consumption amount calculation unit 11b, the ideal fuel consumption rate is obtained from the fuel consumption rate table 50a and [l / miles], based on the average vehicle speed of the vehicle 1 in the section S _1, the section S a ₁ is calculated as the actual fuel consumption [l] consumed by running at _1. Similarly, for other sections, the section distance [km], the ideal fuel consumption [liter], and the actual fuel consumption [liter] are obtained.

  FIG. 5 is a diagram showing an example of a fuel consumption accumulation storage table based on the corrected ideal fuel consumption and actual fuel consumption. Depending on the section of the road on which the vehicle 1 travels, the ideal fuel consumption rate [liter / km] must be corrected by multiplying the correction coefficient α described above. Further, if the weight of the passenger of the vehicle 1 and the loaded cargo cannot be ignored, the ideal fuel consumption rate [liter / km] must be corrected by multiplying the correction coefficient β described above. FIG. 5 shows an example in which the ideal fuel consumption [liter] and the actual fuel consumption [liter] are calculated based on the corrected ideal fuel consumption rate [liter / km] by multiplying the correction coefficients α and β. Show.

For example, since the weight of the passenger / cargo of the vehicle 1 affects the ideal fuel consumption rate [liter / km] over all travel sections, the ideal fuel consumption rate [liter / km] over all travel sections Is corrected by multiplying by β. Further, for example, if the section S ₂ and the section S ₁₁ are sloped sections, the ideal fuel consumption rate [liter / liter] is obtained by multiplying the correction coefficients α ₂ and α ₁₁ corresponding to the slopes of these sections. km]. Such a corrected ideal fuel consumption rate ideal fuel consumption by running section which is calculated on the basis of [l / miles] [l] and the actual fuel consumption [l], the ideal fuel consumption amount _(T'1 ) [Liter] and actual fuel consumption total amount (T ′ ₂ ) [liter] are as shown in the figure.

  Next, fuel efficiency evaluation processing executed by the fuel efficiency evaluation apparatus 10a of the embodiment will be described. FIG. 6 is a flowchart showing a fuel efficiency evaluation processing procedure. As shown in the figure, first, a travel route is set by the car navigation device based on the destination setting by the driver (or passenger) of the vehicle 1 (step S101). Subsequently, the ideal fuel consumption calculation unit 11a acquires road information corresponding to the road section of the travel route set in step S101 through the road information acquisition device 20 (step S102).

  Subsequently, the ideal fuel consumption amount calculation unit 11a calculates an ideal fuel consumption amount (step S103). Subsequently, the corrected ideal fuel consumption calculation unit 11c determines whether or not the correction of the ideal fuel consumption rate [liter / km] based on the weight of the passenger / loaded cargo is necessary (step S104). When it is determined that the ideal fuel consumption rate [liter / km] needs to be corrected based on the weight of the passenger / loading cargo (Yes in step S104), the process proceeds to step S105, and the ideal based on the weight of the passenger / loading cargo is determined. When it is not determined that the fuel consumption rate [liter / km] needs to be corrected (No at Step S104), the process proceeds to Step S106.

  In step S105, the corrected ideal fuel consumption amount calculation unit 11c calculates a corrected ideal fuel consumption rate [liter / km] corrected by the weight of the passenger / loaded cargo. Subsequently, in step S106, the fuel consumption rate calculation unit 11d detects passage of one of the road sections.

  Subsequently, the ideal fuel consumption calculation unit 11a determines whether or not the correction of the ideal fuel consumption rate [liter / km] by the gradient is necessary in the section of the road passed in Step S106 (Step S107). If it is determined that the ideal fuel consumption rate [liter / km] due to the gradient needs to be corrected (Yes at step S107), the process proceeds to step S108, and the ideal fuel consumption rate [liter / km] due to the gradient is corrected. If it is not determined that it is necessary (No at Step S107), the process proceeds to Step S109.

  In step S108, the corrected ideal fuel consumption amount calculation unit 11c calculates a corrected ideal fuel consumption rate [liter / km] corrected by the gradient. Subsequently, in step S109, the corrected ideal fuel consumption calculating unit 11c calculates the road that has passed in step S106 based on the ideal fuel consumption rate [liter / km] or the corrected ideal fuel consumption rate [liter / km]. The ideal fuel consumption [liter] in the section is calculated and the actual fuel consumption [liter] is calculated.

  Subsequently, the fuel consumption rate calculation unit 11d determines whether or not it has passed through all road sections included in the travel route (step S110). When it is determined that all road sections included in the travel route have passed (Yes in step S110), the process proceeds to step S111, and when it is not determined that all road sections included in the travel route have been passed. (No in step S110), the process returns to step S106 to detect passage of the next road section.

  In step S111, the fuel consumption rate calculation unit 11d calculates an ideal fuel consumption rate [liter / km] based on the ideal fuel consumption [liter] in all road sections included in the travel route, and sets the travel route. The actual fuel consumption rate [liter / km] is calculated based on the actual fuel consumption [liter] in all road sections included.

  Subsequently, the fuel consumption rate evaluation processing unit 11e calculates the actual fuel consumption rate [liter / km] calculated in step S111 based on the ideal fuel consumption rate [liter / km] calculated in step S111. Evaluate (step S112). Subsequently, the fuel consumption rate evaluation result display control unit 11f displays the evaluation result of the actual fuel consumption rate [liter / km] in step S112 on the display screen of the display unit 13 (step S113).

Next, a fuel efficiency evaluation display example will be described. FIG. 7A is a diagram illustrating a fuel efficiency evaluation display example (part 1), and FIG. 7B is a diagram illustrating a fuel efficiency evaluation display example (part 2). First, referring to FIG. 7-1, the fuel consumption rate evaluation result display control unit 11 f displays the total travel distance [km] (section from the departure point to the destination point) on the display portion 501 on the display screen 13 a of the display unit 13. L [km] is displayed as the total distance), T ₁ [liter] is displayed as the ideal fuel consumption [liter] on the display portion 502, and T ₂ [liter] is displayed as the actual fuel consumption [liter] on the display portion 503. In the portion 504, T ₁ / L [liter / km] is set as the ideal fuel consumption rate [liter / km], and in the display portion 505, T ₂ / L [liter / km] is set as the actual fuel consumption rate [liter / km]. In the display portion 506, (T ₂ / L) / (T ₁ / L) [%] is displayed as the degree of fuel efficiency achievement [%]. By this display, the driver of the vehicle 1 can recognize at a glance how much fuel consumption driving the driver has achieved. In addition, fuel efficiency is evaluated based on a universal standard regardless of the type of vehicle, so that comparisons between different vehicle types and between different drivers are possible.

Next, referring to FIG. 7B, the fuel consumption rate evaluation result display control unit 11f uses the display portion 507 instead of the display portion 506 in addition to the display portions 501 to 505 shown in FIG. As the amount [liter], {[(T ₂ / L) − (T ₁ / L)] × L} [liter] and the amount [yen] obtained by converting the fuel waste amount into a monetary amount are displayed. By this display, the driver of the vehicle 1 can recognize at a glance how much fuel consumption the driver's own driving wasted.

Incidentally, the T ₁ and T ₂ optionally, gradients or passenger-ideal fuel consumption rate is corrected based on the weight of the cargo based on [l / km] _T'1 and _T'2 and There is a case.

Thus, the total distance L (total travel distance) [km] from the departure point to the destination point, ideal fuel consumption T ₁ (or T ′ ₁ ) [liter], and actual fuel consumption T ₂ (or T ' ₂ ) [liter], ideal fuel consumption rate T ₁ / L [liter / km], actual fuel consumption rate T ₂ / L [liter / km], section distance for each travel section [km], for each travel section Various evaluation displays can be performed based on the ideal fuel consumption [liter] and the actual fuel consumption [liter] for each travel section. In particular, when the achievement rate [%] of fuel consumption rate, the amount of waste fuel [liter], and the market price of waste fuel [yen] are displayed for each travel section, the driver of the vehicle 1 has a negative influence on the overall evaluation. It is possible to analyze what is given.

  According to the above embodiment, the fuel efficiency evaluation apparatus 10a provides the universal ideal fuel consumption rate [liter / km] that does not depend on the driver and the universal road information that does not depend on the driver outside the fuel efficiency evaluation apparatus 10a. Therefore, it does not depend on the vehicle type and driver of the vehicle 1 and is highly versatile.

  As mentioned above, although the Example of this invention was described, this invention is not limited to this, In the range of the technical idea described in the claim, even if it implements in a various different Example, it is. It ’s good. Moreover, the effect described in the Example is not limited to this.

  For example, in the above embodiment, the road information is acquired from the outside of the vehicle 1 by wireless communication via the road information acquisition device 20, but the present invention is not limited to this, as shown in FIG. 10b may store in the storage unit 12 a road information table 12b covering all road information. Except for this point, the fuel efficiency evaluation apparatus 10b is the same as the fuel efficiency evaluation apparatus 10a. In this case, the road information acquisition device 20 can be omitted. In this way, the road information acquisition device 20 is not required to be installed, the cost of communication with the outside can be reduced, and the occurrence of fuel efficiency evaluation processing delay due to communication delay can be avoided.

  In addition, when there is no road information or reception of road information fails, the vehicle speed at which the vehicle 1 has the best fuel consumption (best fuel consumption speed) may be set as the standard vehicle speed, or the speed limit of the map information may be set as the standard vehicle speed. Good. When the speed limit is smaller than the best fuel economy speed, the speed limit may be set as the standard speed. In addition, the received standard speed is applied as the standard speed only when the speed is equal to or less than the speed limit, and when the received standard speed exceeds the speed limit, the speed limit may be set as the standard speed.

  In addition, among the processes described in the above embodiment, all or part of the processes described as being automatically performed can be manually performed, or the processes described as being manually performed can be performed. All or a part can be automatically performed by a known method. In addition, the processing procedure, control procedure, specific name, information including various data and parameters shown in the above embodiment can be arbitrarily changed unless otherwise specified. The units of various numerical values can also be changed as long as there is uniformity among the various numerical values.

  Each component of each illustrated device is functionally conceptual and does not necessarily need to be physically configured as illustrated. In other words, the specific form of distribution / integration of each device is not limited to that shown in the figure, and all or a part thereof may be functionally or physically distributed or arbitrarily distributed in arbitrary units according to various loads or usage conditions. Can be integrated and configured.

  Furthermore, each or all of the processing functions performed in each device are entirely or partially a CPU (Central Processing Unit) (or a microcomputer such as an MPU (Micro Processing Unit) or MCU (Micro Controller Unit)) and It may be realized by a program that is analyzed and executed by the CPU (or a microcomputer such as MPU or MCU), or may be realized as hardware by wired logic.

  The present invention is useful when it is desired to more accurately evaluate fuel consumption based on an ideal fuel consumption rate having universality.

It is a functional block diagram which shows the structure of the fuel consumption evaluation apparatus concerning an Example. It is a figure which shows the example of a fuel consumption rate table. It is a figure which shows the example of road information. It is a figure which shows the example of a fuel consumption accumulation storage table. It is a figure which shows the example of the fuel consumption accumulation storage table based on the correct | amended ideal fuel consumption and actual fuel consumption. It is a flowchart which shows a fuel consumption evaluation process sequence. It is a figure which shows the fuel consumption evaluation display example (the 1). It is a figure which shows the fuel consumption evaluation display example (the 2). It is a functional block diagram which shows the structure of the fuel consumption evaluation apparatus concerning another Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 10a Fuel consumption evaluation apparatus 10b Fuel consumption evaluation apparatus 10a Fuel consumption evaluation apparatus 11 Control part 11a Ideal fuel consumption calculation part 11b Actual fuel consumption calculation part 11c Correction | amendment ideal fuel consumption calculation part 11d Fuel consumption rate calculation part 11e Fuel consumption Rate evaluation processing unit 11f Fuel consumption rate evaluation result display control unit 12 Storage unit 12a Fuel consumption accumulation storage table 12b Road information table 13 Display unit 13a Display screen 20 Road information acquisition device 30a Vehicle speed detection device 30b Gradient detection device 40 Passenger・ Loaded cargo detection device 50 Engine control device 50a Fuel consumption rate table 100 CAN
501, 502, 503, 504, 505, 506, 507 Display part

Claims (6)

A fuel consumption evaluation device for evaluating fuel consumption in driving of a vehicle,
The distance of the road section on which the vehicle is traveling and the standard value of the vehicle speed of the vehicle traveling on the road section are obtained, and the distance of the road section and the standard value of the vehicle speed are the predetermined unit. A minimum fuel consumption calculating means for calculating a minimum amount of fuel that the vehicle consumes to travel on a section of the road based on a minimum amount of fuel that is consumed to travel a distance;
An actual fuel consumption amount calculating means for calculating an actual fuel consumption amount consumed by the vehicle for actually traveling on a section of the road;
Based on the minimum amount of the fuel calculated by the minimum fuel consumption amount calculation means and the actual fuel consumption amount calculated by the actual fuel consumption amount calculation means, the fuel consumption in the travel of the section of the road of the vehicle A fuel efficiency evaluation device comprising: a fuel efficiency evaluation means for evaluating the fuel efficiency.   2. The fuel efficiency evaluation according to claim 1, wherein the distance of the road section on which the vehicle is traveling and the standard value of the vehicle speed of travel on the road section are acquired from outside the vehicle by wireless communication. apparatus.   2. The fuel consumption evaluation apparatus according to claim 1, further comprising storage means for previously storing a distance of a road section on which the vehicle is traveling and a standard value of the vehicle speed of travel in the road section. . At least one of a gradient detection means for detecting a gradient of a road on which the vehicle travels, and a mounting detection means for detecting a passenger boarding the vehicle or a cargo loaded on the vehicle;
In accordance with the gradient detected by the gradient detection means or the loaded weight of the passenger or the cargo estimated based on the detection of the passenger or the cargo by the loading detection means, the vehicle is moved to the vehicle speed. A fuel that corrects the minimum amount of fuel consumed to travel the predetermined unit distance at the standard value of the vehicle and the minimum amount of fuel required for the vehicle to travel the predetermined unit distance at the actual vehicle speed. And a minimum amount correction means,
The fuel efficiency evaluation means evaluates the fuel efficiency of the vehicle traveling on the road section based on the minimum fuel amount corrected by the fuel minimum amount correction means and the actual fuel consumption amount. The fuel consumption evaluation apparatus as described in any one of Claims 1-3.   The apparatus further comprises an informing means for informing the fuel efficiency evaluation of the vehicle traveling on the road section by the fuel efficiency evaluation means by using a display device that displays the vehicle so as to be visible without hindering the driving of the vehicle. The fuel consumption evaluation apparatus as described in any one of Claims 1-4. A fuel consumption evaluation method for evaluating fuel consumption in driving of a vehicle,
The distance of the road section on which the vehicle is traveling and the standard value of the vehicle speed of the vehicle traveling on the road section are obtained, and the distance of the road section and the standard value of the vehicle speed are the predetermined unit. A minimum fuel consumption calculating step for calculating a minimum amount of fuel that the vehicle consumes to travel on the road section based on a minimum amount of fuel that is consumed to travel a distance; and
An actual fuel consumption amount calculating step for calculating an actual fuel consumption amount consumed for the vehicle actually traveling on the road section;
Based on the minimum amount of fuel calculated by the minimum fuel consumption amount calculating step and the actual fuel consumption amount calculated by the actual fuel consumption amount calculating step, the fuel consumption of the vehicle traveling in the road section A fuel efficiency evaluation method comprising: a fuel efficiency evaluation step for evaluating the fuel efficiency.

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