JP5104069B2 - Fuel consumption display device - Google Patents

Description

  The present invention relates to a fuel consumption display device that displays a fuel consumption rate of a vehicle.

  Conventionally, a fuel consumption display device that displays a fuel consumption rate of a vehicle is known (see, for example, Patent Document 1).

  In the fuel consumption display device having the above-described conventional configuration, when an operation that deteriorates the fuel consumption rate (fuel consumption) such as rapid acceleration is performed, an excessive amount of fuel consumed (excess fuel consumption) is calculated thereby, Displayed. If you perform driving that deteriorates fuel consumption, it immediately appears as an increase in excess fuel consumption, so the driver can know the driving operation that caused the deterioration of fuel consumption, and reference when improving driving operation Can be. In addition, since the driver can recognize how much the fuel consumption has been deteriorated by his / her driving operation, the driver can be urged to improve the driving technique.

  In addition, the fuel consumption display device having the above conventional configuration displays the fuel consumption per unit time in addition to the excessive fuel consumption, and the state of change in the fuel consumption per unit time for the past 30 minutes. It is possible to understand how the fuel consumption has changed due to the operation.

In addition, the fuel consumption display device having the above-described conventional configuration, after the operation ends, the recorded excessive fuel consumption is caused by its occurrence (sudden acceleration, sudden deceleration, excess speed, upshifting, but not upshifting, (I.e., idling, idling) can be displayed separately, and the driver can know in detail the driving operation that caused the deterioration of fuel consumption, that is, the driving operation to be improved.
JP 2002-362185 A

  However, the fuel consumption display device having the above-described conventional configuration is configured to display the excess fuel consumption to the driver when driving that deteriorates the fuel consumption such as rapid acceleration, and thus performs driving that deteriorates the fuel consumption. It is necessary to calculate the amount of fuel consumed when the vehicle travels without failure. This calculation includes, for example, calculating the air resistance received by the vehicle, determining whether or not upshifting is possible, and calculating the fuel consumption when the upshifting is performed based on the operating conditions after the upshifting, etc. Is included. Therefore, the fuel consumption display device having the above-described conventional configuration has a problem that the calculation is complicated, and peripheral parts for collecting data necessary for the calculation increase, and a connection circuit with the peripheral parts becomes complicated.

  Further, in the fuel consumption display device having the above-described conventional configuration, while the vehicle is in operation, the current excessive fuel consumption and the past changes in fuel consumption are displayed. The driver cannot recognize the driving operation.

  The present invention has been made in view of the above, and recognizes the past driving operation that caused the fuel consumption to deteriorate even when the vehicle is operating without calculating the excess fuel consumption. An object of the present invention is to provide a fuel consumption display device that can be operated.

  In order to solve the above-described problems, the present invention is characterized by the following measures.

One embodiment of the present invention provides:
A fuel consumption display device comprising a display unit for displaying a fuel consumption rate and fuel consumption of a vehicle,
State determination means for determining the state of the vehicle based on a vehicle speed signal output from a vehicle speed sensor of the vehicle ;
For each state determined by the state determining unit, a fuel consumption calculating unit that adds a fuel consumption rate and a fuel consumption amount;
Image producing means for producing a fuel consumption display image for simultaneously displaying the fuel consumption rate calculated by the fuel consumption calculating means and the fuel consumption amount on the display unit;
Is provided.

Another aspect of the present invention is:
A fuel consumption display device comprising a display unit for displaying a fuel consumption rate and fuel consumption of a vehicle,
State determination means for determining whether the vehicle is in an idling stop state, an acceleration state, a deceleration state, or a low speed state;
For each state determined by the state determining unit, a fuel consumption calculating unit that adds a fuel consumption rate and a fuel consumption amount;
Image producing means for producing a fuel consumption display image for simultaneously displaying the fuel consumption rate calculated by the fuel consumption calculating means and the fuel consumption amount on the display unit;
Is provided.

According to the present invention, it is possible to provide a fuel consumption display device that allows a driver to recognize a past driving operation that has caused fuel consumption to deteriorate even when the vehicle is operating without calculating excess fuel consumption. Can

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a functional block diagram showing an embodiment of a fuel consumption display device of the present invention. As shown in FIG. 1, the fuel consumption display device according to the present embodiment includes a display unit 10 and a display control value 20 that outputs a fuel consumption display image to be described later displayed on the display unit 10. The display control device 20 is connected to a vehicle speed sensor 30 that outputs a pulse signal (hereinafter referred to as a vehicle speed signal) according to the speed of the vehicle, and an engine control unit 40 that outputs a pulse signal (hereinafter referred to as a fuel signal) according to the fuel injection amount. Has been. The display control device 20 determines the state of the vehicle based on the vehicle speed signal output from the vehicle speed sensor 30, and for each determined state, the fuel consumption rate (hereinafter referred to as the fuel consumption rate) based on the fuel signal output from the engine control unit 40. Fuel consumption) and fuel consumption. Hereinafter, each configuration will be described in detail.

  The display unit 10 is configured by a liquid crystal display or the like, and is disposed at a position where the driver can easily see, preferably at a position where the driver can see without significantly changing the visual field during driving. For example, the display part 10 may be arrange | positioned in the center part of the instrument panel upper surface in a vehicle interior, and may be arrange | positioned in a meter.

  A fuel consumption display image described later displayed on the display unit 10 is controlled by the display control device 20. The display control device 20 may be, for example, a part of a navigation device (including a drawing processor). In this case, a map image or the like is supplied and displayed on the display unit 10 in addition to the fuel consumption display image. To switch between the fuel consumption display image and the map image, for example, a pressure-sensitive switch displayed on the display screen of the display unit 10 or a push button switch installed outside the display screen of the display unit 10 is operated. This is realized.

  The display control device 20 is constituted by a microcomputer. For example, the CPU, a ROM for storing a control program, a readable / writable RAM for storing calculation results, a timer for measuring time, and the number of times of calculation and the like are calculated. It has a counter to measure, an input interface, and an output interface.

  As shown in FIG. 1, the display control device 20 includes a state determination unit 21 that determines whether the vehicle is in an idling stop state, an acceleration state, a deceleration state, or a constant speed state, and a fuel consumption rate and a state for each state. An image for creating a fuel consumption display image for displaying the fuel consumption rate and the fuel consumption amount on the display unit 10; Production means 27. In addition, a vehicle speed sensor 30 that outputs a vehicle speed signal and an engine control unit 40 that outputs a fuel signal are connected to the display control device 20 by wire or wirelessly.

  Based on the vehicle speed signal output from the vehicle speed sensor 30, the state determination unit 21 determines whether the vehicle is in an idling stop state, an acceleration state, a deceleration state, or a constant speed state. Specifically, first, the speed V is calculated from the vehicle speed signal, and the acceleration A is calculated by differentiating the speed V with respect to time. Subsequently, when the speed V is 0, the vehicle is idling stopped, when the acceleration A is greater than or equal to the first predetermined value A1, the acceleration state, and when the acceleration A is greater than the second predetermined value A2 and less than the first predetermined value A1, the speed is constant. When the state and acceleration A are equal to or less than the second predetermined value A2, it is determined that the vehicle is in a deceleration state.

  The first predetermined value is positive, and the second predetermined value is negative. The first predetermined value and the second predetermined value are recorded in the ROM of the display control device 20 at the time of manufacture of the vehicle, and are read and used as necessary.

  The state determination means 21 includes a pedal force switch (not shown) that senses that the driver depresses the brake pedal instead of the vehicle speed sensor 30 or together with the vehicle speed sensor 30, and the pedal force applied to the brake pedal is applied to the brake fluid. Master cylinder pressure sensor (not shown) installed in the master cylinder that amplifies the brake pedal force when converting into pressure, wheel cylinder pressure installed in the cylinder that converts brake fluid pressure into inner pad movement A sensor switch (not shown), an engine control unit 40 that outputs a signal corresponding to the engine speed, and an accelerator operation amount sensor (not shown) that senses the accelerator operation amount may be used.

  Specifically, for example, when the depression force switch of the brake pedal is turned on, it can be determined that the vehicle is in a deceleration state or an idling stop state.

  Further, when the master cylinder pressure is equal to or higher than a predetermined value, it can be determined that the vehicle is in a deceleration state or an idling stop state.

  Further, when the engine speed is equal to or higher than the first predetermined value, it can be determined that the vehicle is in an acceleration state. Further, when the engine speed is equal to or less than the second predetermined value, it can be determined that the vehicle is in an idling stop state.

  Further, when the accelerator operation amount is equal to or greater than a predetermined value, it can be determined that the vehicle is in an acceleration state. Further, when the accelerator pedal operation amount is 0, it can be determined that the vehicle is in a deceleration state or an idling stop state.

  The fuel consumption calculation means 23 adds up the fuel consumption and the fuel consumption for each state determined by the state determination means 21.

  The total fuel consumption C1 (idling stop state), C2 (acceleration state), C3 (constant speed state), and C4 (deceleration state) is calculated based on the fuel signal from the engine control unit 40 at the current predetermined time. The fuel consumption amount C per T1 is calculated. Subsequently, the current fuel consumption C per predetermined time T1 is added to any of the past fuel consumptions C1 to C4 according to the state determined by the state determination means 21. Then, by repeating this calculation every predetermined time T1, the fuel consumption amounts C1 to C4 for each state can be added up.

  To calculate the fuel consumption R1 (idling stop state), R2 (acceleration state), R3 (constant speed state), and R4 (deceleration state), first, the current travel distance L per predetermined time T1 is calculated. Specifically, based on the vehicle speed signal output from the vehicle speed sensor 30, the speed V is calculated, and the speed V is time-integrated to calculate the current travel distance L per predetermined time T1. Subsequently, the past travel distance L1 (idling stop state), L2 (acceleration state), L3 (constant speed state) is determined based on the current travel distance L per predetermined time T1 according to the state determined by the state determination means 21. ), L4 (deceleration state). Subsequently, by dividing the fuel consumption C1 (C2, C3, C4) by the travel distance L1 (L2, L3, L4), the fuel consumption R1 (R2, R3, R4) for each state can be calculated. This calculation is also repeated every predetermined time T1.

  The fuel consumption C1 to C4 and fuel consumption R1 to R4 data can be automatically reset when the engine ignition switch is turned off and set to return to zero. Further, regardless of the operation of the ignition switch of the engine, the setting may be reset when the dedicated push button type switch is turned off and returned to 0. This can be changed according to the user's preference.

  The distance calculating means 25 adds up the travel distance for each state determined by the state determining means 21. Specifically, similarly to the fuel consumption calculation means 23, the speed V is calculated from the vehicle speed signal output from the vehicle speed sensor 30, and the speed V is integrated over time, so that the current travel distance L per predetermined time T1 is obtained. Calculate. Subsequently, the current travel distance L per predetermined time T1 is added to any of the past travel distances L1 to L4 in accordance with the state determined by the state determination means 21. By repeating this calculation every predetermined time T1, the traveling distances L1 to L4 for each state can be added up.

  The image creating unit 27 creates a fuel consumption display image for displaying the fuel consumptions R1 to R4 and the fuel consumption amounts C1 to C4 calculated by the fuel consumption calculating unit 23 on the display unit 10. 2 to 4 are views showing examples of fuel consumption display images produced by the image production means 27.

  As shown in FIG. 2, the fuel consumption display image can display fuel consumptions C1 to C4 as bar graphs, and can display fuel consumption R1 to R4 for each state. By displaying as a bar graph, the driver can visually grasp the ratio of the fuel consumption C1 to C4. Visibility can be improved by color-coding this bar graph for every state.

  Further, as shown in FIG. 3, the fuel consumption display image is displayed as a pie chart of the fuel consumption amounts C1 to C4, and the fuel consumption R1 to R4 can be displayed together for each state. By displaying as a pie chart, the fuel consumption C1 to C4 for each state can be displayed as a ratio to the total of the fuel consumption C1 to C4. By displaying as a pie chart, the driver can easily grasp the ratio of the fuel consumptions C1 to C4 as compared with the case where the driver dedicates it as a bar chart (see FIG. 2). Similar to the bar graph, this pie graph can be improved in visibility by color-coding for each state.

  Moreover, as shown in FIG. 4, a fuel consumption display image may display the fuel consumption C1-C4, the fuel consumption R1-R4, and the travel distance L1-L4 as a table | surface for every state. Displaying as a table suppresses the decrease in visibility even when additional data such as travel distances L1 to L4 is displayed, compared to displaying as a bar graph (see FIG. 2) or a pie chart (see FIG. 3). Or it can be prevented.

  Further, the fuel consumption display image may be a display in which a reference value serving as a reference for comparison when improving the driving operation is displayed for each of the fuel consumptions R1 to R4. By displaying the reference value together, it is possible for the driver to know how much the total fuel consumption can be improved by performing any of the driving operations necessary for improving the total fuel efficiency, which will be described later.

  Further, if the driver has improved the driving operation, the fuel consumption display image created by the image creation means 27 is highlighted for the items (for example, fuel consumption R1 to R4) that are expected to improve the total fuel consumption. Good. The highlighted display is generated by emphasizing the frame and the number of items (for example, fuel efficiency R1 to R4) expected to improve the total fuel efficiency with a relatively thick line, fluorescent color, or strong luminance. By highlighting, it is possible to call the driver's attention as to which of the driving operations necessary for improving the total fuel efficiency described later should be executed.

  The reference value used as a reference for comparison in improving driving operation is set for each vehicle type at the time of vehicle design, recorded in the ROM of the display control device 20 at the time of vehicle manufacture, and read out as necessary. Thus, it is used for producing a fuel consumption display image.

  These fuel consumption display images are recorded in the ROM of the display control device 20 for each type of fuel display image, and can be set so that the type can be switched according to the selection from the user.

  In addition, the items displayed in the fuel display image can also be set to be switchable according to the selection from the user.

  The fuel consumption display image produced by these image production means 27 is transferred and displayed on the display unit 10 by a known method, so that the driver can recognize the driving operation necessary for improving the total fuel consumption.

  Driving operations to improve the total fuel consumption include, for example, reducing idling stop time, accelerating slowly instead of sudden acceleration, maintaining constant speed without repeating acceleration / deceleration, and frequently using engine braking It is valid.

  The driver can recognize that the total fuel consumption can be improved by reducing the idling stop time from the fuel consumption amount C1 in the idling stop state displayed on the fuel consumption display image (see FIGS. 2 to 4). In addition, the driver can recognize that the total fuel consumption can be improved by accelerating gently instead of sudden acceleration from the fuel consumption R2 in the accelerated state. Further, if the driver maintains the constant speed state without repeating acceleration / deceleration from the ratio of the fuel consumption amount C2 in the acceleration state, the fuel consumption amount C3 in the constant speed state, and the fuel consumption amount C4 in the deceleration state, the total fuel consumption Can be recognized. Further, the driver can recognize from the fuel consumption R4 in the deceleration state that the total fuel consumption can be improved if the engine brake is frequently used.

  Here, the processing executed by the display control device 20 will be described with reference to the flowchart of FIG.

  When the ignition switch of the engine is turned on, the display control device 20 is automatically turned on. In S11 of FIG. 5, the display control device 20 calculates the speed V of the vehicle and differentiates the speed V with time. The distance L per predetermined time T1 is calculated by integrating the speed V over time. At the same time, the fuel consumption amount C per predetermined time T1 is calculated.

  Subsequently, in S12, it is checked whether or not the vehicle speed V is zero. When the vehicle speed V is 0 in S12 (S12, Yes), since the vehicle is in an idling stop state, the process proceeds to S13, and the fuel consumption amount C per predetermined time T1 is added to the fuel consumption amount C1 in the idling stop state. Proceeding to S22, the ratio of C1 to C4 is calculated. Then, it progresses to S23, a fuel consumption display image is produced, and this process is complete | finished.

Further, when the vehicle speed V is not 0 in S12 (S12, No), the vehicle is in a traveling state, so the process proceeds to S14 to check whether the acceleration A is equal to or higher than the first predetermined value A1. The first predetermined value A1 is set to a positive value, for example, 0.3 m / s ² .

  When the acceleration A is equal to or greater than the first predetermined value A1 in S14 (S14, Yes), the vehicle is in an acceleration state, so the process proceeds to S15, and the fuel consumption amount per predetermined time T1 is increased to the fuel consumption amount C2 in the acceleration state. C is added, and the travel distance L per predetermined time T1 is added to the travel distance L2 in the acceleration state. Subsequently, in S16, the fuel consumption amount C2 is divided by the travel distance L2 to calculate the fuel consumption R2 in the acceleration state, and the process proceeds to S22 to calculate the ratio of C1 to C4. Then, it progresses to S23, a fuel consumption display image is produced, and this process is complete | finished.

When the acceleration A is less than the first predetermined value A1 in S14 (S14, No), the process proceeds to S17, and it is checked whether the acceleration A is greater than the second predetermined value A2. The second predetermined value A2 is set to a negative value smaller than the first predetermined value A1, for example, −0.3 m / s ² .

  When the acceleration A is greater than the second predetermined value A2 in S17 (S17, Yes), the vehicle is in a constant speed state, so the process proceeds to S18, where the fuel consumption C3 in the constant speed state is the fuel per predetermined time T1. The consumption amount C is added, and the travel distance L per predetermined time T1 is added to the travel distance L3 in the constant speed state. Subsequently, in S19, the fuel consumption C3 is divided by the travel distance L3 to calculate the constant speed fuel efficiency R3, and the process proceeds to S22 to calculate the ratio of C1 to C4. Then, it progresses to S23, a fuel consumption display image is produced, and this process is complete | finished.

  When the acceleration A is equal to or less than the second predetermined value A2 in S17 (S17, No), the vehicle is in a decelerating state. Therefore, the process proceeds to S20, and the fuel consumption per predetermined time T1 is increased to the fuel consumption amount C4 in the decelerating state. The amount C is added, and the travel distance L per predetermined time T1 is added to the travel distance L4 in the deceleration state. Subsequently, in S21, the fuel consumption amount C4 is divided by the travel distance L4 to calculate the fuel consumption R4 in the deceleration state, and the process proceeds to S22 to calculate the ratio of C1 to C4. Then, it progresses to S23, a fuel consumption display image is produced, and this process is complete | finished.

  The display control device 20 executes processing after S11 every predetermined time T1, and accumulates data of fuel consumptions C1 to C4 and fuel consumptions R1 to R4.

  As described above, the fuel consumption display device according to the present embodiment includes the display unit 10 and the display control device 20 and is connected to the vehicle speed sensor 30 and the engine control unit 40. In addition, the fuel consumption display device of the present embodiment displays the fuel consumption and fuel consumption accumulated for each idling stop state, acceleration state, deceleration state, and constant speed state on the display unit 10. As a result, the fuel consumption display device according to the present embodiment allows the driver to recognize past driving operations that have caused the fuel consumption to deteriorate even when the vehicle is in operation, without calculating excess fuel consumption. it can.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can be added.

  For example, the fuel consumption display stem of this embodiment displays the fuel consumption C1 to C3 and the fuel consumption R1 to R4 during vehicle operation. The setting can be transferred to a personal computer installed at home or a mobile phone of a driver via an Internet communication device or the like. Thus, by transferring data to a home personal computer or the like, past data can be accumulated, and it can be checked whether or not the driving operation has been improved.

  Further, the fuel consumption display device of the present embodiment is set to be automatically turned on when the ignition switch of the engine is turned on, but there is no limitation on the on / off control method, for example, a push button It is good also as a setting turned on and off by operating the switch of a type | formula.

  In addition, the fuel consumption display image of this embodiment is set to display the reference value as a reference for comparison when improving the driving operation. However, instead of displaying the reference value together, the reference value is displayed together. In addition, it may be determined whether the driving operation is good or bad compared with the reference value, and the determination result may be displayed.

  Moreover, although the reference value displayed on the fuel consumption display image of this embodiment as a reference for comparison when improving the driving operation is the fuel consumption R1 to R4, it is used as a reference for comparison when improving the driving operation. As long as it is possible, the type of the reference value is not limited, and for example, the reference value of the ratio of the fuel consumption C1 to C4 may be displayed.

It is a functional block diagram which shows one Example of the fuel consumption display apparatus of this invention. It is the figure which showed an example of the fuel consumption display image produced by the image preparation means. It is the figure which showed another example of the fuel consumption display image produced by the image preparation means. It is the figure which showed another example of the fuel consumption display image produced by the image preparation means. 5 is a flowchart illustrating an example of processing executed by the display control device 20.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Display part 20 Display control apparatus 21 State determination means 23 Fuel consumption total means 25 Distance total means 27 Image preparation means 30 Speed sensor 40 Engine control unit

Claims (5)

A fuel consumption display device comprising a display unit for displaying a fuel consumption rate and fuel consumption of a vehicle,
State determination means for determining the state of the vehicle based on a vehicle speed signal output from a vehicle speed sensor of the vehicle ;
For each state determined by the state determining unit, a fuel consumption calculating unit that adds a fuel consumption rate and a fuel consumption amount;
Image producing means for producing a fuel consumption display image for simultaneously displaying the fuel consumption rate calculated by the fuel consumption calculating means and the fuel consumption amount on the display unit;
A fuel consumption display device comprising: A fuel consumption display device comprising a display unit for displaying a fuel consumption rate and fuel consumption of a vehicle,
State determination means for determining whether the vehicle is in an idling stop state, an acceleration state, a deceleration state, or a low speed state ;
For each state determined by the state determining unit, a fuel consumption calculating unit that adds a fuel consumption rate and a fuel consumption amount;
Image producing means for producing a fuel consumption display image for simultaneously displaying the fuel consumption rate calculated by the fuel consumption calculating means and the fuel consumption amount on the display unit;
A fuel consumption display device comprising: For each of the states determined by the state determination unit, further comprising a distance totaling unit that totals the travel distance,
The image preparation means displays a fuel consumption display image for simultaneously displaying the fuel consumption rate and the fuel consumption amount calculated by the fuel consumption calculation means and the travel distance calculated by the distance calculation means on the display unit. The fuel consumption display device according to claim 1 or 2, which is manufactured. The fuel consumption display image according to any one of claims 1 to 3 , wherein the fuel consumption display image produced by the image production means displays the fuel consumption amount for each state as a ratio to the total fuel consumption amount. . The fuel consumption display device according to any one of claims 1 to 4, wherein the fuel consumption display image produced by the image production means also displays a reference value as a reference for comparison when improving the driving operation.

Images