JP5707703B2 - Vehicle display device - Google Patents

Description

  The present invention relates to a vehicular display device used for a vehicle such as an automobile, and more particularly to a vehicular display device that displays information for supporting eco-driving.

  As a display device for vehicles, an analog meter comprising a dial having an indicator part and a pointer indicating the indicator part according to the vehicle state, a liquid crystal display panel, an organic EL panel, etc. A digital meter for displaying is known (for example, see Patent Document 1).

  In recent years, with the growing awareness of environmental protection and energy saving, methods for supporting eco-driving that is environmentally friendly and fuel efficient are being studied. As a specific method, for example, Patent Document 2 discloses a method of displaying instantaneous fuel consumption during traveling on a vehicle display device, a method of turning on an indicator (eco lamp) when traveling with good fuel consumption, and the like. Yes.

JP-A-11-078611 JP 2009-126464 A

  However, in such a display method, it is indispensable to connect the ECU and the injector to the wiring so that a fuel injection signal or the like can be input and to acquire fuel consumption data. As the vehicle display device, there is a so-called aftermarket vehicle display device that is retrofitted according to the user's preference, in addition to the one mounted on the vehicle from the beginning. However, when trying to apply a conventional display method that supports eco-driving to vehicle display devices for the aftermarket, the specifications of the fuel injection amount (consumption) based on the fuel injection signal differ depending on the vehicle model, so it corresponds to a wide range of vehicle models In order to improve the accuracy, it is necessary to correct the fuel injection amount based on the actual fuel supply amount, etc. There was room for further improvement in order to obtain information display functions that support eco-driving by configuration.

  The present invention has been made paying attention to the above-described problems, and an object of the present invention is to provide a vehicle display device that can support eco-driving in consideration of the environment with a simple and versatile configuration. Is.

In order to solve the above-mentioned problem, the present invention acquires a vehicle speed pulse signal and an engine speed pulse signal, calculates a travel distance per predetermined time from the vehicle speed pulse signal, and calculates the predetermined time from the engine speed pulse signal. Calculating the average engine speed in the engine, calculating the eco-evaluation point by dividing the travel distance by the average engine speed, and depending on the integrated value of the eco-evaluation point, the control means for integrating the eco-evaluation point Display means for displaying an eco-evaluation image showing the evaluation of eco-drive, and the control means determines the operating state of the engine from the engine speed pulse signal and determines that the engine is not operating The eco-evaluation points are calculated and integrated based on the travel distance .

  The present invention relates to a display device for a vehicle, and enables eco-driving support in consideration of the environment with a simple configuration having high versatility.

The figure which shows the electrical constitution of the display apparatus for vehicles of embodiment of this invention. The figure which shows the example of a display of the display means of embodiment same as the above. The figure which shows the processing method of the control means of embodiment same as the above. The figure which shows the example of a display of the display means of embodiment same as the above. The figure which shows the example of a display of the display means of embodiment same as the above. The figure which shows the example of a display of the display means of embodiment same as the above.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 shows a vehicular display device, which mainly includes a control means 1, a display means 2, and a storage medium 3.

  The control means 1 is composed of a microcomputer, a ROM for storing a program for obtaining a vehicle speed and a travel distance, a CPU for executing the program, a RAM for temporarily storing calculation results and data (pulse period), An interface circuit for inputting a state signal proportional to the traveling speed of the vehicle from the vehicle speed sensor mounted on the vehicle and the engine speed from the rotation sensor is provided.

  The control means 1 inputs an SP pulse signal (vehicle speed pulse signal) as a status signal from a vehicle speed sensor (not shown) mounted on the vehicle, shapes the SP pulse signal, and generates the waveform-shaped pulse signal. The cycle or frequency is obtained, the vehicle speed and travel distance, which are vehicle information, are obtained according to the cycle or frequency, and these are output to the display means 2 as control signals. Further, the control means 1 inputs a TA pulse signal (engine speed pulse signal) as a status signal from an engine rotation sensor (not shown) mounted on the vehicle, shapes the TA pulse signal, and forms the waveform. The period or frequency of the pulse signal thus obtained is obtained, the engine speed, which is vehicle information, is obtained according to the period or frequency, and this engine speed is output to the display means 2 as a control signal. Note that the control means 1 may input a vehicle speed information signal and an engine speed information signal from a separate control unit such as an ECU as a state signal indicating the vehicle speed and the engine speed. Further, the control means 1 calculates an eco-evaluation point that evaluates the degree of eco-driving performed while the vehicle is running based on the travel distance and the engine speed, integrates the eco-evaluation points, and the integrated value of the eco-evaluation points As a control signal to the display means 2.

  The display means 2 consists of flat displays, such as a liquid crystal display device arrange | positioned, for example on the dashboard of a vehicle, and an organic electroluminescent display. The display unit 2 includes a drive circuit (not shown) and draws a predetermined display image based on a control signal from the control unit 1. FIG. 2 shows an example of a display image of the display means 2. The display means 2 includes a vehicle speed display unit 21 for displaying the vehicle speed digitally (numerical values), a plurality of beans 22a serving as an indicator for the engine speed, and a scale. An engine speed display unit 22 that displays a bar at 22b, and an eco display unit 23 that displays eco-drive evaluation by a bean tree (eco-evaluation image) 23a are displayed. Further, the display means 2 digitally displays the voltage display unit 24 that digitally displays the voltage of the power supply, the time display unit 25 that digitally displays the time, the travel distance display unit 26 that digitally displays the travel distance, and the average vehicle speed. The average vehicle speed display unit 27, the stop number display unit 28 for digitally displaying the number of stops, the idling time display unit 29 for digitally displaying the idling time, and indicators 30a and 30b that the engine speed has reached a specified value And the tacho warning unit 30 to be notified.

  The storage medium 3 is formed of a memory card having a flash memory capable of writing and reading data, for example, in the case body, and is detachably disposed on the vehicle display device and is electrically connected to the control means 1.

  The input unit 4 performs various operations related to the function of the vehicle display device. In the present embodiment, the input unit 4 can set the difficulty level in the eco display function by the eco display unit 23 in particular.

  Next, a control method in the eco display function will be described with reference to FIG.

  First, the control means 1 calculates the travel distance TR and the engine speed TA based on the input SP pulse signal and TA pulse signal (step S1).

  Next, the control means 1 calculates a new average engine speed avTA based on the engine speed TA acquired in step S1 and the past average engine speed avTA (step S2).

  Then, the control means 1 determines whether or not a predetermined time (here 60 seconds) has elapsed, repeats the processing of steps S1 and S2 until the predetermined time elapses, and proceeds to step S4 after the predetermined time elapses. As a result, the travel distance TR and the average engine speed avTA for each predetermined time are obtained.

  The control means 1 determines whether the vehicle has traveled or stopped in step S4. That is, the control means 1 determines whether or not the travel distance TR is 0 km. If the travel distance TR is not 0 km (TR ≠ 0), the control means 1 proceeds to step S5, and if the travel distance TR is 0 km (TR = 0). ) Proceeds to step S6.

  The control means 1 determines whether or not the engine is further operating in step S5. That is, the control means 1 determines whether or not the average engine speed avTA is not 0 rpm. If the average engine speed avTA is not 0 rpm (avTA ≠ 0), the process proceeds to step S7, where the average engine speed avTA is 0 rpm. (AvTA = 0), the process proceeds to step S8.

  The control means 1 determines whether or not the engine is further operating in step S6. That is, the control means 1 determines whether or not the average engine speed avTA is not 0 rpm. If the average engine speed avTA is not 0 rpm (avTA ≠ 0), the process proceeds to step S9, where the average engine speed avTA is 0 rpm. (AvTA = 0), the process proceeds to step S10.

Therefore, when the vehicle is running and the engine is operating, the process proceeds to step S7. The control means 1 executes a first eco-evaluation point calculation process as a method for calculating the eco-evaluation point EP during normal driving. This first eco-evaluation point calculation process is based on an evaluation that the eco-evaluation point EP is an effective eco-drive when the vehicle travels a longer travel distance TR at a lower engine speed TA. Is a method of calculating Specifically, for example, EP = TR / avTA × a (a is a constant)
The travel distance TR and the average engine speed avTA are converted into eco-evaluation points EP by the following formula. According to the above equation, the eco evaluation point EP increases as the travel distance TR increases and / or the average engine speed avTA decreases. Note that the first eco-evaluation point calculation process may be a method using a data table for determining the eco-evaluation point EP based on the travel distance TR and the average engine speed avTA. The control means 1 moves to step S11 after the first eco-evaluation point calculation process.

If the vehicle is running and the engine is not operating, the process proceeds to step S8. Such a state corresponds to, for example, a case where the vehicle is driven only by battery power supply in a hybrid vehicle, and can be said to be a state of high fuel efficiency in which fuel is not consumed during traveling. The control means 1 executes a second eco-evaluation point calculation process as a method for calculating the eco-evaluation point EP at the time of high fuel efficiency. This second eco-evaluation point calculation process is a method of calculating an eco-evaluation point EP based on an evaluation that an effective eco-driving is performed for a longer travel distance TR. Specifically, for example, EP = TR × b (b is a constant)
The travel distance TR is converted into an eco-evaluation point EP by the following formula. According to the above equation, the eco evaluation point EP increases as the travel distance TR increases. The second eco-evaluation point calculation process may be a method using a data table for determining the eco-evaluation point EP based on the travel distance TR. The control means 1 moves to step S13 after the second eco-evaluation point calculation process.

Further, when the vehicle is not running and the engine is operating, the control means 1 moves to step S9. Such a state is a state in which idling driving or idling is performed, and is a state in which fuel consumption is not performed and fuel efficiency is poor. The control means 1 executes a third eco-evaluation point calculation process as a method for calculating the eco-evaluation point EP in a state where fuel efficiency is poor. This third eco-evaluation point calculation process is a method of calculating the eco-evaluation point EP based on the evaluation that the operation is contrary to the eco-drive when the average engine speed avTA is higher. Specifically, for example, EP =-(avTA / c) (c is a constant)
The average engine speed avTA is converted into an eco evaluation point EP by the following formula. According to the above formula, the eco evaluation point EP has a negative value, and the absolute value of the eco evaluation point EP increases as the average engine speed avTA increases. The third eco-evaluation point calculation process may be a method using a data table for determining the eco-evaluation point EP based on the average engine speed avTA. The control means 1 moves to step S11 after the third eco-evaluation point calculation process.

Further, when the vehicle does not travel and the engine is not operating, the process proceeds to step S10. Such a state is a state where the engine is stopped and does not contribute to fuel consumption or traveling. The control means 1 executes a fourth eco-evaluation point calculation process as a method for calculating the eco-evaluation point EP in a state that does not contribute to running or fuel consumption. The fourth eco-evaluation point calculation process is a method of calculating the eco-evaluation point EP based on the evaluation that the previous evaluation result is maintained. Specifically, for example, EP = 0
The eco-evaluation point EP is calculated by the following mathematical formula. According to the above formula, the eco-evaluation point EP is “0”, and the integrated value tEP of the eco-evaluation point EP does not increase or decrease when integrating the eco-evaluation point EP described later. The fourth eco-evaluation point calculation process may be a method using a data table for determining the eco-evaluation point EP based on the travel distance TR and the average engine speed avTA. The control means 1 proceeds to step S13 after the fourth eco-evaluation point calculation process.

  In step S11, the control means 1 determines whether or not the average engine speed avTA is high. That is, the control means 1 determines whether or not the average engine speed avTA is equal to or greater than a specified value x (for example, 2000 rpm). If the average engine speed avTA is equal to or greater than the specified value x (avTA ≧ x), a step is performed. The process proceeds to S12, and if the average engine speed avTA is less than the prescribed value x (avTA <x), the process proceeds to step S13.

Therefore, when the average engine speed avTA is high, the process proceeds to step S12. Such a state is a state where fuel consumption is excessive and fuel efficiency is poor. The control means 1 executes an eco-evaluation point subtraction process for subtracting the eco-evaluation point EP based on the evaluation that the operation is contrary to the eco-drive when the average engine speed avTA is higher. Specifically, for example, EP = EP− (avTA−x) / d (d is a constant)
The eco-evaluation point EP is corrected by the following formula. According to the above equation, the value by which the eco evaluation point EP is subtracted increases as the average engine speed avTA increases. The eco-evaluation point subtraction process may be a method using a data table that determines a subtraction value of the eco-evaluation point EP based on the average engine speed avTA. Further, in the eco-evaluation point subtraction process, it is determined whether or not the average engine speed avTA has increased with respect to the past average engine speed avTA, and if the average engine speed avTA has increased, the average engine speed Subtraction processing may be performed so that the subtraction value of the eco-evaluation point EP in the eco-evaluation point calculation process is larger than when the number avTA has not increased. The control means 1 moves to step S13 after the eco-evaluation point subtraction process.

In step S13, the control means 1 executes an eco-evaluation point integration process for integrating the eco-evaluation points EP calculated by the above process. In this eco-evaluation point calculation process, the newly calculated eco-evaluation point EP is added to the integrated value tEP of the previous eco-evaluation point EP, and is set according to the degree of difficulty that can be selected by a plurality of stages by the input means 4. The integrated eco-evaluation point EP is corrected by the correction value LV. That is, the integrated value tEP of the eco-evaluation points EP is, for example, tEP = tEP + EP−LV
Is calculated by the following mathematical formula. According to the above formula, when the difficulty level is low and the correction value LV is small, the integrated value tEP of the eco-evaluation point EP tends to increase, and when the difficulty level is high and the value of the correction value LV is large, the integrated value of the eco-evaluation point EP tEP is unlikely to increase.

  In step S14, the control unit 1 outputs a control signal to the display unit 2 based on the integrated value tEP of the eco evaluation points EP obtained in step S13, and updates the display of the eco display unit 23 on the display unit 2. 2 and 4 to 6 show changes in display in the eco display unit 23. FIG.

  FIG. 2 shows an initial stage of display in the eco display unit 23. In the initial stage, the bean tree 23a indicating the evaluation of eco-driving is in a state where the amount (length) growing from the ground surface (downward in FIG. 2) is small (low). Then, as the integrated value tEP of the eco-evaluation points EP increases by repeatedly executing the processing from step S1 to step S14, the amount that the bean tree 23a grows as the first stage of growth increases (highly). As shown in FIG. Thereafter, as the integrated value tEP of the eco-evaluation point EP further increases, the bean tree 23a is made to bloom (displayed) as a second stage of growth as shown in FIG. At this time, a finer change in the integrated value tEP of the eco-evaluation points EP can be displayed by gradually changing the flower size. Thereafter, as the integrated value tEP of the eco-evaluation point EP further increases, as shown in FIG. 6, the flower of the bean tree 23a is changed to a bean (replaces the flower with a bean) as a third stage of growth. At this time, it is possible to display a finer change in the integrated value tEP of the eco-evaluation point EP by expressions such as changing the flowers to beans one by one, gradually changing the bean size, or changing the bean color. it can. Thus, the expression that the bean tree 23a is grown in accordance with the increase in the integrated value tEP of the eco-evaluation points EP can indicate to the user that the eco-drive evaluation is improved. Users can feel that their driving is evaluated as eco-driving not by the numerical value but by the growth of the bean tree 23a, and incentives to continue eco-driving by expecting further growth of the bean tree 23a Can be obtained. In addition, when the integrated value tEP of the eco-evaluation point EP decreases, it can be shown to the user that the eco-drive evaluation has deteriorated by changing the display of the bean tree 23a in the reverse order. . The user can realize that his driving is not evaluated as eco-driving due to the retreat of the growth of the bean tree 23a, and can get an incentive to strive for eco-driving by wishing the growth of the bean tree 23a. it can.

  Such a display device for a vehicle calculates an eco-evaluation point EP that is an evaluation result of the eco-drive based on the travel distance TR and the average engine speed avTA, and evaluates the eco-drive according to the integrated value tEP of the eco-evaluation point EP. By displaying the bean tree 23a indicating that the driving course and driving operation are suitable for eco-driving, the user can realize whether or not the driving course is suitable for eco-driving, and enhance eco-friendly eco-driving support. Is possible. The SP pulse signal for calculating the travel distance TR and the TA pulse signal for calculating the average engine speed avTA are easy to set in order to correspond to a wide range of vehicle types as compared with the fuel injection signal. It is possible to support eco-friendly eco-driving with a simple configuration with high versatility without complicating the circuit. In order to support a wide range of vehicle types, it is necessary to set the number of pulses in the SP pulse signal, and it is necessary to set the number of cylinders in the TA pulse signal. It is much easier than setting the amount.

  Further, by correcting the integration of the eco-evaluation points EP based on the difficulty level that can be set in a plurality of stages, the bean tree 23a can be used according to the environment for eco-driving such as skill level of driving skills and vehicle displacement. It is possible to change the easiness of the change as appropriate, display more according to the user's preference, and improve the merchantability as a vehicle display device.

  If the average engine speed avTA is equal to or greater than the specified value x, the eco-evaluation point EP is deducted to reduce the eco-driving in consideration of the case where excessive fuel is consumed without calculating the combustion consumption. Evaluation can be performed, and more accurate evaluation can be performed.

  In the present embodiment, the eco-evaluation point EP is calculated based on the average engine speed avTA. However, the eco-evaluation point EP may be calculated based on the engine speed TA.

  In the present embodiment, the eco-evaluation points EP are integrated, and the bean tree 23a, which is an eco-evaluation image, is displayed according to the integrated value tEP of the eco-evaluation points EP. May display an eco-evaluation image according to an eco-evaluation point calculated on the basis of the travel distance and the engine speed to indicate an eco-drive evaluation for an instantaneous driving operation. In such a case, the display of the eco-evaluation image may be a display for growing a plant such as a bean tree, or may simply turn on and blink an indicator.

  The present invention relates to a vehicle display device used for a vehicle such as an automobile, and is particularly suitable for an aftermarket vehicle display device that displays information for supporting eco-driving.

DESCRIPTION OF SYMBOLS 1 Control means 2 Display means 3 Storage medium 4 Input means

Claims (5)

Obtain the vehicle speed pulse signal and the engine speed pulse signal,
Calculate the mileage per predetermined time from the vehicle speed pulse signal,
An average engine speed at the predetermined time is calculated from the engine speed pulse signal,
A control means for calculating an eco-evaluation point by dividing the travel distance by the average engine speed, and integrating the eco-evaluation point;
Display means for displaying an eco-evaluation image indicating an eco-drive evaluation according to the integrated value of the eco-evaluation points,
The control means determines the operating state of the engine from the engine speed pulse signal, and calculates and integrates the eco-evaluation point based on the travel distance when determining that the engine is not operating. A vehicle display device. The vehicle display device according to claim 1, wherein the control unit corrects the integration of the eco-evaluation points based on a difficulty level that can be selected in a plurality of stages. 2. The vehicle display device according to claim 1, wherein when the engine speed is equal to or greater than a predetermined value, the control means performs a deduction process for the eco evaluation score. The vehicle display device according to claim 1, wherein the eco-evaluation image includes a plant, and changes in the integrated value of the eco-evaluation points are expressed by the growth of the plant. Obtain the vehicle speed pulse signal and the engine speed pulse signal,
Calculate the mileage per predetermined time from the vehicle speed pulse signal,
An average engine speed at the predetermined time is calculated from the engine speed pulse signal,
Control means for calculating an eco-evaluation point by dividing the travel distance by the average engine speed;
Display means for displaying an eco-evaluation image showing an eco-drive evaluation according to the eco-evaluation point,
Wherein the control unit determines the operating state of the engine from the engine rotational speed pulse signal, when determining that the engine is not running, characterized Rukoto issuing calculate the ecological evaluation point based on the travel distance Vehicle display device.

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