JP2012158269A - Display device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device for a vehicle capable of resetting a learned fuel consumption by way of a simple operation.SOLUTION: The display device for a vehicle calculates a possible cruising distance that a vehicle can continue to travel from the present moment as a reference point, by utilizing a learned fuel consumption found based on both the past amount of fuel consumption and relative traveling distance, and the amount of fuel remaining in the vehicle, while having a reset switch unit 7 that resets the value of the learned fuel consumption to the prescribed value of a second initial fuel consumption. The display device also has a unit which resets the value of the learned fuel consumption to the value of a prescribed first initial fuel consumption when the battery 13 carried on the vehicle is switched from the state of being unconnected to the display device for a vehicle to being connected thereto. The display device has another display apparatus 6 which calculates, upon resetting by the reset switch unit 7 or the battery 13, a possible cruising distance by utilizing the learned fuel consumption after resetting to the first or second initial fuel consumption is performed. The first initial fuel consumption and the second initial fuel consumption having the same value can be accepted.

Description

  The present invention relates to a display device for a vehicle that calculates and displays a predictable cruising distance from a remaining amount of fuel, and in particular, a function for resetting a learned fuel consumption used for calculation of a cruising distance to an initial fuel consumption by a simple operation. The present invention relates to a vehicle display device having

  In recent years, social awareness of automobile fuel consumption has been improved, and fuel-related information tends to increase in vehicle information displayed on automobile meters. One of them is cruising range information, and the cruising range is a mechanism calculated based on the learned fuel consumption (calculated based on past fuel consumption) and the current fuel remaining amount.

  The learning fuel consumption used to calculate the cruising distance is the initial fuel consumption because there is no past data when the battery, which is the on-vehicle power supply, is switched from the OFF state to the ON state where the battery is connected to the vehicle. (Fuel consumption set based on catalog fuel consumption) is initially set, and thereafter, the system is designed to feed back and learn the fuel consumption based on the actual driving results of the driver.

  As a result, the initial value at the beginning of driving approaches the actual fuel consumption as the fuel consumption results are accumulated. However, if the learned fuel consumption becomes abnormal for some reason, there is no mechanism for correcting the learned fuel consumption, and there is currently no method other than removing the battery from the vehicle.

  Patent Document 1 is known as a device that calculates a cruising range. In Patent Document 1, the remaining amount of fuel in the fuel tank is measured by a fuel sensor. Further, the fuel consumption is obtained from the opening / closing pulse of the injection valve in the electronic fuel injection device. Further, the travel distance is measured by the travel distance sensor.

  The distance traveled for each liter of fuel consumption is obtained and stored. The arithmetic circuit reads the travel distance corresponding to the past fuel consumption equivalent to the remaining fuel from the storage device, and outputs the read travel distance to the display device as the cruising distance from the present time.

  For example, if the remaining fuel is 12.5 liters, the travel distance when traveling with the remaining fuel of the past 12 liters is read from the storage device, and the read travel distance is output to the display device as the cruising distance from the present time. ing. Therefore, the content output to the display device changes according to past travel distance data.

JP-A 61-277019

  As described above, at present, the learning fuel consumption is not reset unless the battery is turned off, and if the battery is turned off and reset, it is necessary to reset it from the clock adjustment. For this reason, it is very troublesome to turn off the battery and reset.

  On the other hand, when the learned fuel consumption becomes an abnormal value due to an unintended cause, for example, it is often desired to reset the learned fuel consumption after lending the vehicle to another person or after traveling on a special travel route. Paid attention. The inventor also paid attention to the fact that when a rental car company rents a vehicle to a customer, it can be rented without feeling of use by resetting the learning fuel consumption of the driver rented last time.

  The present invention has been made paying attention to the problems and points of focus existing in the prior art, and its purpose is to reset the learned fuel consumption with a simple button operation without turning off the battery. An object of the present invention is to provide a display device for a vehicle that makes it possible to do this.

  Descriptions of patent documents listed as prior art can be introduced or incorporated by reference as explanations of technical elements described in this specification.

  In order to achieve the above object, the present invention employs the following technical means. That is, according to the first aspect of the present invention, the cruising range is calculated and displayed using the learned fuel consumption obtained from the fuel consumption in the vehicle and the travel distance of the vehicle, and the fuel remaining amount in the fuel tank of the vehicle. A display device for a vehicle, the display means for displaying the calculated cruising distance, the reset switch means operated by the vehicle occupant, and the battery of the vehicle from a state in which the connection with the display means is released The first initial setting means for initially setting the first initial fuel consumption set in advance to the latest learned fuel consumption when the state is switched to the connected state, and the preset first preset fuel consumption when the reset switch means is operated. 2 Initial setting means to initially set the initial fuel consumption to the latest learned fuel consumption, and cruising distance calculation for calculating the cruising distance displayed on the display means using the latest learned fuel consumption Is characterized by comprising: a stage, a.

  According to the present invention, the learned fuel consumption that has been learned so far can be easily achieved by operating the reset switch means without removing the battery from the vehicle and connecting the battery to the vehicle. It is possible to switch to the second initial fuel consumption. Therefore, in normal times, the cruising range can be calculated using the latest learned fuel consumption reflecting the learning results obtained so far.

  On the other hand, when the reset switch means is reset by the operation of the vehicle occupant, the cruising distance can be calculated using the predetermined second initial fuel consumption. Therefore, when the learned fuel consumption becomes an abnormal value due to an unintended cause, the learned fuel consumption can be easily reset to the second initial fuel consumption, for example, after lending the vehicle to another person or after traveling on a special travel route. Therefore, it is possible to display the correct cruising distance suitable for the passenger at that time. In addition, when a rental car company rents a vehicle to a customer, it can be rented without a feeling of use by resetting the learning fuel consumption of the rented occupant last time.

  Since there are at least two types of initial fuel efficiency, the first initial fuel efficiency and the second initial fuel efficiency, the first initial fuel efficiency and the second initial fuel efficiency may be set to the same value or different values depending on each case. It becomes possible.

  The invention according to claim 2 is characterized in that when the reset switch means is operated, the display means displays that the reset switch means has been operated.

  According to the present invention, when the reset switch means is operated, a display indicating that the second initial fuel consumption is initially set to the latest learning fuel consumption is displayed, so that it is clearly indicated that the learned fuel consumption has been reset to the occupant. I can inform you.

  The invention according to claim 3 is characterized in that the reset switch means comprises a reset switch that resets the section travel distance displayed on the trip meter that displays the section travel distance to zero.

  According to the present invention, every time the displayed section travel distance is reset to zero, the predetermined second initial fuel consumption can be initially set to the latest learned fuel consumption. After the state is satisfied, the cruising distance can be compared between the past section that has traveled the same distance and the current section. In addition, when a rental car company rents a vehicle to a customer, it is possible to rent the vehicle without feeling of use more than before by resetting both the learned fuel consumption of the rented passenger and the section mileage.

  According to a fourth aspect of the present invention, there is provided storage means for storing the learned fuel consumption when the fuel tank is filled with the maximum amount of fuel, and the latest initial fuel consumption preset by the second initial setting means is learned. The second initial fuel consumption when initially setting the fuel consumption is characterized by comprising the learned fuel consumption when the past fuel tank is filled with the maximum amount of fuel.

  According to the present invention, when the reset switch means is reset, the learning fuel consumption at the past maximum fuel amount of the fuel tank as the second initial fuel consumption is initially set to the latest learning fuel consumption, and then the cruising range is possible. Compared to calculating the cruising range by returning to the typical fuel economy of the vehicle described in the catalog etc., the influence when the learning fuel economy becomes an abnormal value due to an unintended cause is calculated. However, it is possible to display the cruising range reflecting the learning results so far. For example, when going on a trip, the fuel tank is often set to the maximum fuel amount state, but if you want to return to the state where the learned fuel consumption has deteriorated drastically by traveling on a special mountain road for a long time, the previous fuel tank By making the learned fuel consumption when the maximum fuel amount is the second initial fuel consumption when the reset switch means is reset, it is possible to display the cruising range reflecting the driving characteristics of the occupant.

It is a front view of the instrument board for vehicles which shows a 1st embodiment of the present invention. It is a block block diagram of the display apparatus for vehicles in the said embodiment. It is a flowchart for the cruising range display performed within the meter computing device in the embodiment. It is a front view of the instrument panel for vehicles which shows 2nd Embodiment of this invention. It is a block block diagram of the display apparatus for vehicles in 2nd Embodiment of this invention. It is the table | surface which showed typically the state of the memory of the memory | storage device in 3rd Embodiment of this invention.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration.

  Not only combinations of parts that clearly indicate that the combination is possible in each embodiment, but also the embodiments are partially combined even if they are not clearly specified unless there is a problem with the combination. It is also possible.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3. FIG. 1 is a front view of an instrument panel for a vehicle showing a first embodiment of the present invention. The vehicle instrument panel 1 is provided with instruments such as a vehicle speed meter 4 and an engine tachometer 5 on a display board 3 in a meter hood 2. Reference numeral 6 denotes a display device (multi-display) composed of a liquid crystal display device (LCD) that performs digital display of various types of information using a dot matrix.

  The display device 6 displays that the cruising range is 400 km. The letter R in the display image in the display device 6 indicates that the learning fuel consumption has been reset to the initial fuel consumption, and disappears after a predetermined time. Further, by touching the screen of the display device 6, the display content can be switched to a trip meter, odometer, or clock display. Reference numeral 7 denotes a rod-like operation switch that forms reset switch means.

  FIG. 2 is a block diagram of the vehicle display device according to the first embodiment. On the vehicle traveling direction side, which is the back side of the display board 3, a meter arithmetic device 10 composed of a meter microcomputer is mounted.

  The meter computing device 10 includes a signal from a rod-like operation switch constituting the reset switch means 7, a signal indicating the remaining fuel amount in the fuel tank 11, and a signal indicating the travel distance from the engine control device 12, a battery A signal from 13 is connected. Further, a display signal is supplied from the meter arithmetic device 10 to the display device 6. In this embodiment, the trip meter is incorporated in the display device 6.

  FIG. 3 is a flowchart for displaying a cruising range executed in the meter computing device 10. In FIG. 3, when the control is started at regular intervals, it is determined in step S10 whether or not the power supply voltage from the battery 13 in FIG. Is done.

  The state in which the battery 13 is removed from the vehicle is switched to the state in which the battery 13 is electrically connected to the vehicle, and the state in which there is no power supply voltage from the battery 13 is switched to the state in which the power supply voltage from the battery 13 is present. If YES, the process proceeds to step S11.

  In step S11, the first initial fuel consumption is initially set to the learning fuel consumption. In the first embodiment, the first initial fuel consumption is a representative fuel consumption described in a vehicle catalog or the like. On the other hand, in step S10, when the battery 13 is not removed from the vehicle and the battery 13 is not connected, for example, when there is no change in the connection state of the battery 13, it is determined NO, step S12. Proceed to

  In step S12, in order to calculate and update the learned fuel consumption, the learned fuel consumption is calculated from the driving performance. Although various methods can be employed for the calculation of the learning fuel consumption, for example, it is performed as follows.

  The remaining fuel amount is measured by a fuel sensor (not shown) in the fuel tank 11 of FIG. Further, from the engine control device 12, information obtained by measuring the fuel consumption of the engine is input to the meter arithmetic device 10. This fuel consumption amount is obtained from an opening / closing pulse of an injection valve in an electronic fuel injection device (not shown). In addition, from the engine control device 12, information from a travel distance sensor that measures a travel distance is input to the meter arithmetic device 10.

  Each time the remaining fuel amount decreases by a predetermined amount, for example, 1 liter, the distance traveled is obtained from the measured value from the distance sensor, and sequentially stored in the memory of the storage device 15 connected to the meter arithmetic device 10. .

  The measured value from the distance sensor obtained every time the remaining fuel amount decreases by a predetermined amount represents the learned fuel consumption. The storage device 15 stores travel distance data for each predetermined fuel consumption in order. In addition, the stored value is updated with the running record at the next full tank. At the time of this update, the average value up to the previous time may be stored.

  Next, in step S13 in FIG. 3, it is determined whether or not there is a signal from the reset switch means 7 comprising the rod-shaped operation switch in FIG. 1, that is, whether or not the reset switch means 7 is turned on. If the reset switch means 7 is not turned on, it is determined as NO, the process proceeds to step S14, the cruising distance is calculated with the latest learned fuel consumption, and the calculated value is displayed on the display device 6 of FIG. .

  The calculation of the cruising range with the latest learning fuel consumption is executed as follows. For example, if the remaining fuel amount is 12.5 liters, the travel distance data when the remaining fuel amount is 12 liters rounded down after the decimal point is read from the storage device 15 (FIG. 2). Next, the cruising distance is calculated from the learned fuel consumption and the remaining fuel amount, which are the latest travel distance data for each predetermined fuel consumption read from the storage device 15. Then, the calculated cruising distance is displayed on the display device 6.

  If the reset switch means 7 is ON in step S13, the travel distance data (catalog value etc.) for each predetermined fuel consumption in the representative driving of the vehicle, which is the second initial fuel consumption, in step S15. ) Is initially set to the latest learned fuel consumption, and the cruising distance in step S14 is calculated, and the calculated value is displayed on the display device 6 of FIG.

  Thus, in the first embodiment, the first initial fuel consumption and the second initial fuel consumption are set to the same value, and the troublesome work of removing the battery 13 from the vehicle and connecting the battery 13 to the vehicle again is eliminated. However, the learned fuel consumption that has been learned so far can be easily switched to the initial fuel consumption by operating the reset switch means 7. Therefore, in normal times, the cruising range can be calculated using the latest learned fuel consumption among the learned fuel consumptions learned so far.

  On the other hand, when the reset switch means 7 is reset by the operation of the vehicle occupant, the cruising distance can be calculated using the predetermined initial fuel consumption. Therefore, if the learned fuel consumption becomes an abnormal value due to an unintended cause, the learned fuel consumption can be easily changed to the initial fuel consumption, for example, after lending the vehicle to another person or driving on a special driving route (such as a mountain road). Can be reset.

  Accordingly, it is possible to display the correct cruising distance suitable for the passenger at that time. In addition, when a rental car company rents a vehicle to a customer, it can be rented without a feeling of use by resetting the learning fuel consumption of the rented occupant last time.

  Further, when the reset switch means 7 is operated, a display indicating that the fuel consumption has been reset to the initial fuel consumption is displayed on the display screen of the display device 6 with the letter “R” as shown in FIG. Since this display continues for a predetermined time, the occupant can know that the learning fuel consumption has been reset. The first initial fuel consumption and the second initial fuel consumption can be set to different values.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the following embodiments, the same components as those in the first embodiment described above are denoted by the same reference numerals, description thereof will be omitted, and different configurations and features will be described. FIG. 4 is a front view of a vehicle instrument panel showing a second embodiment of the present invention. FIG. 5 is a block diagram of a vehicle display device according to the second embodiment.

  In the second embodiment, as shown in FIGS. 4 and 5, a trip meter 14 that displays the section travel distance is disposed adjacent to the display device 6 that displays the cruising range. A trip meter reset switch 7a for resetting the display value of the trip meter 14 to zero is also used as a reset switch means for calculating the cruising range. As shown in FIG. 5, the signal of the trip meter reset switch 7 a is inputted to the meter arithmetic device 10.

  In FIG. 4, the trip meter 14 displays 142 km, which is the travel distance from when the trip meter reset switch 7a was turned on last time. When the trip meter reset switch 7a is turned on, the display of 142 km on the trip meter 14 is reset to 0 km.

  When the trip meter reset switch 7a is turned on, it is treated as if the reset switch in step S13 of the flowchart used in FIG. 3 for displaying the cruising distance is turned on, and the learning fuel consumption is the initial value. Reset to fuel economy. The cruising distance is calculated and displayed based on the initial fuel consumption.

  As described above, in the second embodiment, the trip meter reset switch 7a for resetting the display value of the trip meter 14 to zero is also used as the reset switch means for calculating the cruising range, and thus is displayed. Every time the section travel distance is reset to zero, the learning fuel efficiency can be reset to a predetermined initial fuel efficiency.

  Therefore, each time the vehicle travels the same distance, the cruising range can be compared and felt between the previous section and the current section. For example, for passengers who regularly go to the same destination, if the fuel tank is filled with fuel and the trip meter is set to 0 km and the departure is made, the cruising distance will be set to the previous time each time the mileage is overlapped by a predetermined amount. It can be compared with a memorandum or memorized value of the cruising range in the section of.

  In addition, when a rental car company rents a vehicle to a customer, it resets both the learned fuel economy and the section mileage of the rented occupant last time at the same time, so there is no forgetting to reset, and there is no feeling of use more than before Lending is possible.

(Third embodiment)
Next, a third embodiment of the present invention will be described. Features different from the above-described embodiment will be described. FIG. 6 is a table schematically showing the state of the memory of the storage device according to the third embodiment of the present invention.

  For example, in the fuel tank 11 (FIG. 2) containing 50 liters of fuel, the travel distance data from when the fuel tank is filled with the maximum fuel amount (when full) until 1 liter is reduced is stored in the first memory area M1. For example, 11.6 km is stored at 50 addresses. The travel distance data when the tank is full is also stored in the first address of the second memory area M2 in which only the travel distance data when the tank is full is stored.

  In the first embodiment, when the reset switch means 7 is turned on, the learning fuel consumption is set to the second initial fuel consumption, and the second initial fuel consumption is set to a representative value specified in a catalog or the like. However, in this third embodiment, when the reset switch means 7 is turned on, 12.3 stored in the second address of the second memory area M2, which is the stored value of the learned fuel consumption when the tank is full, is stored. This is set as the second initial fuel consumption. When the reset switch means is turned ON twice during a predetermined time, 10.8, which is the stored value of the learned fuel consumption when the tank is full two times before, is set as the second initial fuel consumption.

  According to this, when the reset switch means 7 is reset, the cruising distance can be calculated using the learned fuel consumption when the fuel tank is full as the second initial fuel consumption.

  For this reason, compared with the case of calculating the cruising range by returning to the typical fuel consumption described in the vehicle catalog etc., the influence when the learning fuel consumption becomes an abnormal value due to an unintended cause is excluded. On the other hand, the cruising range can be displayed using the learning fuel consumption considering the learning results up to that point to some extent.

  For example, when you go on a trip, you often get full, but if you want to return to a state where the learned fuel consumption has deteriorated drastically after traveling on a special mountain road for a long time, By setting the initial fuel consumption when the reset switch means is reset, it is possible to display the cruising distance reflecting the same driving characteristics of the occupant. Further, it becomes possible to adopt the learning fuel consumption (10.8 of the third address in the second memory area M2) at the time of the full tank before the same number of passengers.

(Other embodiments)
The present invention is not limited to the above-described embodiments, and can be modified or expanded as follows. For example, in the first embodiment described above, the reset switch means 7 uses a switch that memorizes the position mechanically. However, when using a manual operation automatic return type switch that returns every time it is turned ON, it is turned ON. It may be determined whether or not the reset switch is turned on using the value of the switch signal stored in the flip-flop circuit whose signal is inverted each time.

  Moreover, the touch switch in the display apparatus 6 can also be used as a reset switch means. Further, the touch switch serving as the reset switch means may be configured as a touch switch in a display image in the instrument setting mode on a navigator display placed at a place other than the dashboard on the dashboard of the vehicle.

  In the third embodiment, the second initial fuel consumption is not the representative fuel consumption described in the catalog or the like, but is the fuel consumption stored in the second memory area M2, but the battery is connected from an unconnected state. The initial fuel efficiency at the time may be a typical value described in a catalog or the like. That is, the second initial fuel consumption when resetting by the reset switch means and the first initial fuel consumption when resetting by connection of the battery may be the same value or different values.

DESCRIPTION OF SYMBOLS 1 Vehicle instrument board 3 Display board 4 Speedometer 6 Display apparatus 7 Reset switch which constitutes reset switch means 10 Meter computing device 11 Fuel tank 12 Engine control device 13 Battery 14 Trip meter 15 Storage device 7a Trip meter reset switch M1 1st 1 memory area M2 2nd memory area

Claims (4)

A vehicle display device that calculates and displays a cruising distance using a fuel consumption amount in a vehicle and a learned fuel consumption obtained from a travel distance of the vehicle and a fuel remaining amount in a fuel tank of the vehicle,
Display means for displaying the calculated cruising distance;
Reset switch means operated by an occupant of the vehicle;
When the vehicle battery is switched from the disconnected state to the connected state, the first initial fuel consumption set in advance is initially set to the latest learned fuel consumption. Setting means;
Second initial setting means for initially setting a preset second initial fuel consumption to the latest learned fuel consumption when the reset switch means is operated;
A vehicle display device, comprising: a cruising distance calculation unit that calculates the cruising distance displayed on the display unit using the latest learned fuel consumption.   The vehicle display device according to claim 1, wherein when the reset switch means is operated, the display means displays that the reset switch means is operated.   The vehicle display according to claim 1 or 2, wherein the reset switch means includes a reset switch that resets the section travel distance displayed on a trip meter that displays the section travel distance to zero. apparatus. Storage means for storing the learned fuel consumption when the fuel tank is filled with a maximum amount of fuel;
The second initial fuel consumption when the second initial fuel consumption preset by the second initial setting means is initially set to the latest learned fuel consumption is when the past fuel tank is filled with the maximum amount of fuel. The vehicle display device according to any one of claims 1 to 3, wherein the vehicle fuel consumption is learned fuel consumption.

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