JP2010085310A - Fuel consumption monitor display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device for visually easily grasping or recognizing fuel consumption as a whole, and fuel consumption of an air-conditioning part or an electric part. <P>SOLUTION: A fuel consumption monitor display device for displaying so as to view the fuel consumption of a vehicle from a driver seat is constituted to display the fuel consumption of the vehicle, an air-conditioning usage energy amount and/or an electric usage amount in the same kind of figures on the same graphs, and to display to make the figures expressing the fuel consumption different from the figures expressing the air-conditioning usage energy amount and/or the electric usage amount in the size and/or colors, knows an amount of the fuel consumption by the size on figure display, and easily grasps the fuel consumption of the air-conditioning part and the electric part in relative relationship with the whole fuel consumption. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an apparatus for displaying fuel consumption, which is the amount of fuel used in a power source of a vehicle.

  Recently, it has been desired to improve the fuel consumption of vehicles using fossil fuels (reduce fuel consumption) against the backdrop of demands for reducing greenhouse gases and rising crude oil prices. Research and development of mechanical technology and control technology are underway to meet such demands, but improvement in driving technology can also improve fuel efficiency to some extent. In order to drive while paying attention to fuel consumption, it is effective to inform the driver of the fuel consumption and fuel consumption rate during driving, and knowing the fuel consumption and fuel consumption rate can drive the vehicle I think it will be fun. In view of this, a display device that has been devised such as enrichment of display contents and improvement of visibility has been developed, and examples thereof are described in Patent Documents 1 to 4.

JP 2006-133010 A JP 2003-166868 A JP-A-11-220807 JP 2003-220907 A

  Patent Document 1 describes a display device configured to display the fuel consumption per unit distance and the amount of fuel consumed for air conditioning side by side. However, the configuration described in Patent Document 1 displays each consumption amount as a numerical value, and the instantaneous fuel consumption, which is the overall consumption amount, and the consumption amount for air conditioning are displayed in different units. Therefore, it is difficult to grasp the situation of fuel consumption and the direction of improvement of the driving state of the vehicle, and there is room for improvement.

  Further, in Patent Document 2, by setting the vehicle speed and the temperature in the vehicle interior, the fuel consumption is calculated based on the total weight including the passenger and the remaining fuel, the temperature difference between the vehicle interior and exterior, and the vehicle speed, And an apparatus configured to display is described. However, since the apparatus of Patent Document 2 calculates and displays the fuel consumption by setting the vehicle speed and the vehicle interior temperature, the simulation is performed assuming the vehicle speed and the vehicle interior temperature. It is close to what is displayed, and it is not possible to inform the driver of the fuel consumption that reflects at least the actual driving state and driving state from time to time, and what gives data to improve the driving state so that fuel consumption improves It can't be.

  Further, Patent Document 3 describes a device configured to obtain a reference fuel consumption according to a running state and display a difference between the reference fuel consumption and an actual fuel consumption in an actual running state. ing. The reference fuel consumption is set to a smaller value as the power regeneration rate by the brake is smaller. However, since the device described in Patent Document 3 displays the amount of fuel consumed for traveling of the vehicle, it reflects the manner of acceleration and deceleration and the degree thereof, but other than traveling. Therefore, it is impossible to inform the driver of information for improving the fuel consumption of the vehicle as a whole because the amount of energy consumed can not be notified.

  Patent Document 4 describes an apparatus configured to display the amount of electricity consumed by various on-vehicle electric devices. However, when the vehicle is traveling, the amount of fuel consumed for traveling is much greater than the amount of electricity consumed, so even if the amount of electricity consumed can be known, the overall fuel consumption of the vehicle should be improved. However, the display of information for improving the driving state of the vehicle is not always sufficient, and there is room for improvement.

  The present invention has been made paying attention to the above technical problem, and an object thereof is to provide a display device that can easily grasp the amount and ratio of fuel consumed for traveling, air conditioning, and the like. It is.

  In order to achieve the above object, the invention of claim 1 is a fuel consumption monitor display device for displaying the fuel consumption of a vehicle so as to be visible from the driver's seat, wherein the fuel consumption of the vehicle, the amount of energy used for air conditioning, and / or the use of electricity. The amount is displayed in the same graph in the same kind of figure, and the figure representing the fuel consumption and the figure representing the air-conditioning use energy amount and / or the electricity use amount are made different in size and / or color. It is characterized by being configured to display.

  According to a second aspect of the present invention, in the first aspect of the invention, the graph is a bar graph having a bar or a line whose length indicates an amount as the graphic, and the width and length of the graphic indicating the fuel consumption are the air conditioning. It is a fuel consumption monitor display device characterized by being larger than the width and length of a figure showing the amount of energy used and / or the amount of electricity used.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, units of the fuel consumption and the amount of energy used for air conditioning and / or the amount of electricity used are aligned, and each value in a state where the units are aligned is represented by the graphic. It is a fuel consumption monitor display device characterized by displaying according to the size of.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the graph includes a graph that displays an instantaneous value of the fuel consumption and the amount of energy used for air conditioning and / or the amount of electricity used, and the fuel consumption. It is a fuel consumption monitor display device characterized by including at least one of the graph which displays the value for the predetermined time with the said air-conditioning energy consumption and / or electricity usage.

  According to the apparatus of the present invention, the fuel consumption of the vehicle and the amount of energy used for air conditioning and / or the amount of electricity used are displayed graphically in the same graph. It can be easily grasped, and in particular, since the size of the figure indicates the consumption or consumption rate, the amount or rate can be easily grasped visually. Further, since the size of the figure indicates the amount or rate, it is possible to easily grasp the relative amount or rate by aligning the units. Furthermore, if configured to display instantaneous values, it is possible to know the relationship between the operating state such as accelerator operation and brake operation at that time and fuel consumption, and to display values during a predetermined time Then, it becomes possible to know the tendency of the change in fuel consumption.

  Embodiments of the present invention will be described below with reference to the drawings. The display device according to the present invention can be used for a vehicle whose fuel consumption changes depending on a traveling state such as acceleration / deceleration, vehicle speed, etc., and an electric power usage state such as an air conditioner, a light, an acoustic device, and the like. These include vehicles using an internal combustion engine, electric vehicles using a motor, and hybrid vehicles using an internal combustion engine and a motor. Moreover, the vehicle which air-conditions a vehicle interior and carries audio equipment, such as a liquid crystal television and a stereo receiver, can be made into object.

  FIG. 2 schematically shows an instrument panel 1 of a hybrid vehicle. A speedometer 2 is disposed at the center of the instrument panel 1, and fuel consumption display portions 3 and 4 for displaying fuel consumption are provided on the left and right sides thereof. It has been. The fuel consumption display unit 3 on the left side in FIG. 2 is an instantaneous fuel consumption monitor that displays the fuel consumption every moment, and the fuel consumption display unit 4 on the right side in FIG. 2 displays “kw” for each of the travel energy, the air conditioning load, and the electrical load. It is an energy monitor that displays. Each of these display units 3 and 4 is configured to display the fuel consumption, each energy or load in a graphic form such as a bar graph or a pie chart. For example, in the case of a bar graph, a bar or line The length may be configured to indicate the amount of fuel or energy consumed.

  Further, as in the energy monitor shown on the right side of FIG. 2, in the configuration in which the traveling energy and each load are simultaneously displayed on the same graph, the shapes and display colors of the respective figures are different. For example, a graphic indicating driving energy corresponding to fuel efficiency is displayed with the thickest bar or line, and other loads are displayed with relatively thin bars or lines.

  Further, the apparatus shown in FIG. 2 includes a multi-display 5. The multi-display 5 is a panel for switching and displaying fuel consumption and energy consumption states in addition to map information, television images, air conditioning operation buttons, and the like in the navigation system. The multi-display 5 is configured so that the display content of each of the display units 3 and 4 can be appropriately edited and displayed. The display can be switched by configuring the multi-display 5 with a touch panel. This can be done by touching the screen.

  FIG. 1A and FIG. 1B show examples of display regarding fuel consumption in the multi-display 5. FIG. 1A shows an example in which only fuel consumption is displayed, and instantaneous fuel consumption 6 and time-dependent fuel consumption 7 every predetermined time (for example, every 5 minutes) are displayed as bar graphs. The instantaneous fuel consumption 6 and the time-dependent fuel consumption 7 are displayed as the travel distance (km / L) per liter of fuel. Since both are bar graphs, they are displayed as lower (shorter) bar lines as the amount of fuel consumption increases (that is, the fuel efficiency is worse). When the apparatus according to the present invention is mounted on a hybrid vehicle, the energy regenerated during deceleration can also be displayed. In the example shown in FIG. 1, the regenerative energy is indicated by a lamp symbol, and one symbol is displayed. It is sufficient to indicate a predetermined unit amount (for example, 50 Wh), and the greater the number of symbols, the greater the regenerative amount, and accordingly the fuel efficiency is improved accordingly.

  (B) of FIG. 1 is an example of a display in which the display of the multi-display 5 is switched, and the air-conditioning loss (air-conditioning use energy) 8 and the electric loss (electricity-use amount) 9 are written together in terms of fuel consumption and energy. . These losses 8 and 9 are also displayed as a bar graph in the fuel economy 6 and 7, but the thickness or display color of the bar or line is different from that of the fuel economy 6 or 7, Specifically, it is displayed as a thin bar or line. Therefore, the amount of fuel consumption can be easily recognized as the size of the figure, and the amount of energy used for air conditioning and the amount of electricity used and the relative amount with respect to fuel consumption can be easily recognized visually.

  Here, a method of calculating a value that serves as a basis for the above-described display will be described. The final fuel consumption as a vehicle is obtained from the travel distance within a predetermined time by converting the integrated fuel injection amount into the fuel weight. This is the same as the conventional method for calculating fuel consumption. The amount of energy consumed for air conditioning and the amount of energy consumed as electricity (including the amount of regenerative energy) detects the rotational speed, pressure, refrigerant flow rate, etc. of the compressor used in the air conditioning system. Based on a signal from the sensor, a signal from a temperature sensor inside or outside the vehicle, a signal from various ammeters, and the like, the amount of energy is converted into a fuel amount and replaced with fuel consumption.

  More specifically, first, in the air conditioning relationship, the relationship between the air conditioning energy (kW) and the required fuel amount is prepared in advance as a map, and the air conditioning energy calculated based on data from various sensors is used as the required fuel. Convert to quantity. An example of the map is schematically shown in FIG. Similarly, the relationship between the electric energy amount and the required fuel amount is prepared in advance as a map, and the electric energy amount calculated based on data obtained from a sensor such as an ammeter is converted into the required fuel amount. An example of this map is schematically shown in FIG. Since these maps change for each vehicle such as power generation efficiency and loss, they are determined in advance for each vehicle.

Next, the lost fuel consumption for air conditioning and the lost fuel consumption for electricity are obtained by the following formulas, and the calculation results are sent to the display device and displayed as a graph.
Air-conditioning loss fuel consumption = Calculated fuel consumption value of vehicle x Required air-conditioning fuel amount for this section ÷ Accumulated fuel amount for this section (1)
Electricity loss fuel consumption = Calculated fuel consumption value of vehicle x Required fuel amount for this section / Cumulative fuel amount for this section (2)

Next, another calculation method will be described. First, the power loss is determined. The power loss due to air conditioning differs between the mechanical and electrical types of the air conditioning system.
Necessary power for air conditioning (kW) = f ((outside temperature-room temperature), ventilation rate, room volume) ... (a)
It can be obtained by the function of However, since it is difficult to obtain a relational expression that accurately represents the actual state, and an error is likely to occur between the calculated value and the actual measurement value, the values obtained by experiments from the parameters of the above equation (a) are mapped, and the map The more accurate value can be obtained by using.

  In the case of an electric air conditioning system, the work amount (kW) calculated by the electronic control device constituting the system may be used.

The power loss thus obtained is converted into the required fuel amount. When the air conditioning system is a mechanical type, it can be calculated by the following formula.
Required fuel amount (g) = engine fuel consumption rate × required air conditioning power × time conversion (b)
Here, the fuel efficiency of the engine is obtained from a two-dimensional map of the engine speed and the engine load, and the map uses the net fuel consumption (BSFC: g / kWh) that can be obtained by an engine performance test as a two-dimensional map. The contour map shown in FIG. 5 is a two-dimensional map.

Moreover, when an air conditioning system is an electrical system, it calculates | requires by the following formula.
Required fuel amount (g) = Engine fuel consumption rate x Air conditioning required power ÷ Electric conversion efficiency x Time conversion (c)
Note that the engine fuel efficiency is obtained from the map described above. In addition, when considering the efficiency in an electric air conditioning system, usually, the product is multiplied by the power generation efficiency of the generator, the conversion efficiency when charging power to the battery, and the conversion efficiency when taking out power from the battery, Since this differs depending on the configuration of the air conditioning system (so-called hardware configuration), it is necessary to use the efficiency according to the configuration of the air conditioning system.

On the other hand, conversion of the loss power of electricity into the required fuel amount is performed as follows. In that case, the electrical conversion efficiency differs between when the power is taken out from the battery and used, and when the battery is regenerated and recharged, so it is calculated separately for the + (plus) side and the-(minus) side. It is good to add them together.
Electricity consumption (kW) = (MG power running power + other electrical components power consumption) / take-out side electrical conversion efficiency (d)
Charging-side electricity quantity (kW) = MG regenerative power / charging-side electricity conversion efficiency (e)
Total amount of electricity (kW) = consumer side amount of electricity (kW) + charge side amount of electricity (kW) (f)
Required fuel amount (g) = Engine fuel consumption rate x Total electricity amount x Time conversion (g)
In addition, the engine fuel consumption rate of (g) type | formula is calculated | required from the map mentioned above. MG is a motor / generator used in a hybrid vehicle. Furthermore, when the total amount of electricity (kW) or the required amount of fuel (g) is negative, the amount of power on the charging side due to MG regeneration is large.

  Using the required amount of fuel for air conditioning (g) and the required amount of fuel for electricity (g) calculated in this way, the air conditioning loss fuel consumption and the electricity loss fuel consumption can be calculated from the above equations (1) and (2). Calculated.

  By the way, the loss fuel consumption of electricity becomes positive or negative on the hybrid vehicle due to the consumption of electric power and regeneration, and it is preferable to adopt the following display mode. . As an example, in the graph shown in FIG. 1B described above, the electrical component is guarded at zero on the negative side (charging side). That is, the display of electricity is not performed. In other display forms, if the electric component is a minus side (charge side), the gain becomes a gain, and this is used as a fuel efficiency gain, and the upper end portion of the fuel economy display is color-coded corresponding to the gain and displayed as a wide bar. . An example of the display is schematically shown in FIG. In FIG. 6, reference numeral 10 indicates the gain.

  In addition, the figure used for the display in this invention is not restricted to a bar graph or a pie chart, but various figures with decoration can be used.

It is a schematic diagram which shows the example of the display of the fuel consumption by the apparatus which concerns on this invention. It is a figure which shows an example of the instrument panel of the vehicle made into object by this invention. It is a schematic diagram which shows an example of the map for converting air-conditioning energy into required fuel amount. It is a schematic diagram which shows an example of the map for converting electrical energy into required fuel amount. It is a schematic diagram which shows an example of the map for calculating | requiring an engine fuel consumption rate. It is a schematic diagram which shows the example which displays an electrical gain collectively.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Instrument panel, 3, 4 ... Fuel consumption display part, 5 ... Multi-display, 6 ... Instantaneous fuel consumption, 7 ... Fuel consumption over time, 8 ... Air-conditioning loss part, 9 ... Electricity loss part.

Claims (4)

In the fuel consumption monitor display device that displays the fuel consumption of the vehicle so that it can be viewed from the driver's seat,
The fuel consumption of the vehicle, the amount of energy used for air conditioning and / or the amount of electricity used are displayed in the same graph in the same graph, and the figure representing the fuel consumption and the amount of energy used for air conditioning and / or the amount of electricity used are displayed. A fuel consumption monitor display device, characterized in that it is configured so as to be displayed in a different size and / or color from a graphic representing the fuel consumption.   The graph is a bar graph with the length or the bar indicating the amount as the graphic, and the width and the length of the graphic indicating the fuel consumption are the graphic width indicating the air-conditioning energy consumption and / or the electricity usage amount. The fuel consumption monitor display device according to claim 1, wherein the fuel consumption monitor display device is longer than the length.   2. The fuel consumption and the amount of energy used for air conditioning and / or the amount of electricity used are aligned, and each value when the units are aligned is displayed according to the size of the figure. Or the fuel consumption monitor display device according to 2;   The graph is a graph that displays instantaneous values of the fuel consumption and the air-conditioning use energy amount and / or electricity use amount, and a value between a predetermined time between the fuel consumption and the air-conditioning use energy amount and / or electricity use amount. 4. The fuel consumption monitor display device according to claim 1, wherein the fuel consumption monitor display device includes at least one of a graph and a graph.

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