JP2003252080A - Vehicle display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle display device mounted on a vehicle which displays the traveling distance and the fuel consumption of the vehicle on a display unit so as to easily understand the correct fuel consumption. <P>SOLUTION: This vehicle display device comprises a display unit 1, a control unit 5 which calculates the traveling distance of the vehicle and displays it on the display unit 1, and an input unit 4 to input the oil feed in the control unit 5. The control unit 5 calculates the fuel consumption (the fuel consumption rate) based on the traveling distance and the oil feed, and displays it on the display unit 1. A user can easily understand the correct fuel consumption based on the traveling distance and the fuel consumption required for the vehicle to travel the distance. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device mounted on a vehicle, and more particularly, to a display device for a vehicle which displays a traveling distance and a fuel consumption of the vehicle on a display unit.

[0002]

2. Description of the Related Art As a display device for a vehicle of this type, a single display (display unit) made of a liquid crystal display device is used to display an average fuel consumption and a total traveling distance of a vehicle, a traveling distance including a trip total distance, and the like. 2. Description of the Related Art A display device is known that displays information such as fuel consumption, which is instantaneous fuel consumption. This kind of display device usually has a control unit composed of a microcomputer, and this control unit calculates a mileage value and a fuel consumption rate (fuel consumption), and displays the calculation result on the display unit. There is.

The mileage value and the fuel consumption rate are calculated based on an input signal from a detection element such as a sensor installed outside. Specifically, in the case of the mileage, a detection signal from a vehicle speed sensor ( It is calculated based on the input signal). In the case of fuel consumption, as shown in, for example, Japanese Unexamined Patent Publication No. 8-334052, the traveling distance value calculated based on the detection signal of the vehicle speed sensor and the integrated value of fuel injection amount (input signal)
There are known ones that are calculated from the above, and one that is calculated from the traveling distance value and the detection value (input signal) of the fuel sensor as shown in Japanese Patent Laid-Open No. 11-20508.

[0004]

However, the fuel consumption calculation system disclosed in each of the above publications calculates the fuel consumption amount based on the fuel injection amount and the detection value of the fuel sensor, and the actual fuel consumption amount. Since it is not based on, although it is possible to calculate most values, it is difficult to calculate accurate values,
It may be close to the theoretical value. For this reason, in order to know the accurate fuel consumption, it has been inconvenient to calculate using a calculator, a writing instrument or the like after refueling at a gas station, for example. Therefore, the present invention provides a display device for a vehicle capable of easily knowing accurate fuel consumption.

[0005]

In order to achieve the above object, the present invention provides a display unit, a control unit for calculating at least a mileage of a vehicle and displaying it on the display unit, and a refueling amount is input to the control unit. An input means is provided, and the control unit calculates a fuel consumption rate based on the traveling distance and the refueling amount, and displays the fuel consumption rate on the display unit.

Further, the present invention is characterized in that the control unit calculates and displays the fuel consumption rate even after the key switch of the vehicle is shut off.

Further, the present invention is characterized in that the input means has an operation section for manually inputting the oil supply amount.

Further, the present invention has a reset operation means for outputting a reset signal for resetting the traveling distance to the control section, and the reset operation means has an operation section for manually inputting the reset signal. It is characterized in that the section and the operation section of the input means are constituted by a common operation member.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the vehicle display device according to the present invention applied to an automobile will be described below with reference to the accompanying drawings.

FIG. 1 is a front view of a vehicle display device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a block diagram showing a system configuration of the embodiment, and FIG. 5 is a flowchart showing a fuel consumption calculation / display flow of the control unit according to the embodiment, and FIGS. 5A to 5D are front views showing the operation of the display unit according to the fuel consumption calculation / display flow of FIG. 4.

1 and 2, the vehicular display device according to the present embodiment has a display portion 1, and the display portion 1 is arranged so as to face a window portion 3 of a panel surface 2 of a vehicle combination meter. ing. An input unit 4 for switching the display content of the display unit 1, resetting (clearing) the display value, and inputting a refueling amount, which will be described later, is provided on the lower side portion of the window 3.

The display unit 1 is a liquid crystal panel (LC
A display panel consisting of D) is used. As the display panel, any display element such as VFD, EL, LED can be used. In the state shown in FIG. 1, the display unit 1 displays the trip distance 1a that can be reset by operating the input means 4 as the traveling distance, but cannot be reset by operating the input means 4. It is possible to display the total accumulated distance (total mileage) and fuel consumption described later. Any display can be performed on the display unit 1, and for example, the outside air temperature, time, and various notification information may be displayed.

The input means (reset operation means) 4 is composed of an operation section (operation member) 41 which can be operated by the user, and an operation section 42 which outputs a signal to a control section which will be described later in response to the operation of the operation section 41. It is configured. One end of the operation portion 41 is connected to the operation portion 42, and the other end is provided in a shaft shape protruding and extending to the front (user side) of the panel surface 2. Although not shown, the operating unit 42 includes a rotary switch mechanism and a push switch mechanism inside. The rotary switch mechanism operates the operation unit 41 in the directions of arrows L and R in FIG. 1 (hereinafter, simply referred to as rotation operation),
The first operation signal is output to the control unit. On the other hand, in the push switch mechanism, the operation unit 41 is shown in FIG.
A second operation signal is output to the controller by operating in the X direction (hereinafter simply referred to as a pressing operation). In this case, the first operation signal output by the rotation operation of the operation unit 41 becomes a signal related to the setting input of the oil supply amount described later, and the second operation signal output by the pressing operation of the operation unit 41 is the situation. In addition to a signal relating to the setting input of the refueling amount (a signal for confirming the refueling amount in step 104 described later), a reset signal for resetting the accumulated trip distance 1a to the initial value "0", It serves as a switching signal for switching the display value or the like displayed on the display unit 1.

As shown in FIG. 3, the display unit 1 is operated through a control unit 5 composed of a microcomputer. The display unit 1 is connected to the output side of the control unit 5 and is connected to the input side thereof. Input means 4, vehicle speed sensor 6, key switch (ignition switch) 7, and battery 8 are connected to each other.

Although not shown, the control unit 5 includes a vehicle speed sensor 6
CPU (central processing unit) which inputs a detection signal (input signal) from the switch, a switching signal from the key switch 7 or the first and second operation signals from the input means 4, and executes various predetermined processing programs. Device), a ROM for storing the processing program, a RAM for temporarily storing data necessary for operating the display unit 1, a memory such as an EEPROM (nonvolatile memory), and the display unit 1 according to an output signal of the CPU. It is composed of a liquid crystal driver which outputs a drive signal for driving (operating).

The vehicle speed sensor 6 outputs a pulse signal proportional to the speed of the vehicle, and the control unit 5 receives this pulse signal as an input signal and counts the number of pulses.
The traveling distance is calculated (calculation processing), and the calculation result is displayed on the display unit 1a as the trip accumulated distance 1a or the total accumulated distance.

The key switch 7 includes a battery 8 and a control unit 5.
When the switch is operated from the off position to the on position, a switching signal is input to the control unit 5, and the CP is connected to the power saving mode in response to the input of the switching signal.
U is switched to the normal power mode, the traveling distance is calculated for each predetermined cycle based on the detection signal output from the vehicle speed sensor 6 in accordance with the traveling of the vehicle, and the calculation result is displayed on the display unit 1. The key switch 7 has an accessory terminal, an ignition terminal, and a start terminal, which are not shown, but the “on position” in the present embodiment may be any of those terminal positions.

The battery 8 is connected to the control unit 5 via a power supply line not passing through the key switch 7 in addition to the signal line passing through the key switch 7, and when the key switch 7 is off, that is, the control unit 5 In the power saving mode of
Electric power is supplied to the control unit 5 through this power supply line. Therefore, even when the key switch 7 is off,
In addition to displaying the traveling distance, it is possible to switch and reset the display value via the input means 4, and calculate and display the fuel consumption described later. The mileage displayed on the display unit 1 at this time is the data stored in the memory immediately before the key switch 7 is turned off.

Next, the fuel consumption calculation / display flow executed by the control unit 5 will be described with reference to FIGS. 4 and 5. Here, the fuel supply at the gas station has been completed, and the state of the key switch 7 has been completed. Is off, and the trip accumulated distance 1a is displayed on the display unit 1.

In this state, the control unit 5 operates by receiving power from the battery 8, reads trip accumulated distance data stored in the memory in step 101, and displays the data on the display unit 1. (See FIG. 5 (a)). Next, at step 102, based on the presence / absence of an input signal from the input means 4, in this case, whether or not the first operation signal generated by the user rotating the operation unit 41 is input, the refueling amount input operation is performed. If it is determined whether or not the oil supply amount input operation has been started and it is determined that there is a signal input and the oil supply amount input operation has been performed (Yes), step 10
Proceed to the refueling amount input mode of 3. In step 102, if the user rotates the operation unit 41 even a small amount,
A signal is input to the control unit 5, so that the refueling amount input mode is started and the refueling amount can be input according to the operation amount. When the user presses the operation unit 41 after entering the refueling amount input mode, the display value of the display unit 1 cannot be reset, but it can be switched. It should be noted that the determination whether the second operation signal input at that time is reset or switching is performed by the operation time of the operation unit 41 (pressing duration time)
Will be determined according to.

In the refueling amount input mode of step 103,
In a state where the oil supply amount input setting according to the first operation signal by the rotation operation amount of the operation unit 41 is possible, and after step 102, the user continues the rotation operation of the operation unit 41,
The refueling amount corresponding to the operation amount is input to the control unit 5, and the value at the time of the input operation is displayed at any time as shown in FIG.
Is displayed on the screen, which allows the user to confirm the input value. In addition, in the setting input of the refueling amount, if the first operation signal is input in step 10, if a predetermined value (for example, 30 L) is set unconditionally, it becomes possible to set quickly. The convenience for the user can be improved.

In the next step 104, it is determined whether or not the input refueling amount is fixed (whether or not the refueling amount input operation is completed), based on the presence or absence of the input of the second operation signal by the pressing operation of the operating portion 41. Then, if it is determined that the second operation signal input is present and confirmed (Yes), the process proceeds to the next step 105.
If the operation unit 41 is further rotated after step 104, the input oil supply amount can be changed, and the operation unit 4 can be changed again.
When 1 is pressed, the changed refueling amount is confirmed as the input value. In addition, the processing of step 104 is abolished and the first
If there is no operation signal input for, and it continues for a predetermined time,
It is assumed that the input of refueling amount is completed, and the next step 1
You may make it advance to 05.

In step 105, it is determined whether or not the calculation start operation is performed based on the presence / absence of the second operation signal input, and it is determined that the second operation signal input is present and the calculation start operation is performed (Yes). Then, the fuel consumption (fuel consumption rate) is calculated based on the amount of refueling input in step 106 and the trip accumulated distance data stored in the memory, and the calculation result is displayed on the display unit 1 in step 107 ( See FIG. 5 (c). In this example, the travel distance per unit liter is displayed as the fuel consumption. Step 104
If there is a second operation signal input in (Yes) and there is no second operation signal input in the subsequent step 105 (No), it is determined in step 108 whether or not a predetermined time has elapsed from the processing in step 104, When it is determined that the predetermined time has elapsed (Yes), it is considered that the fuel consumption display has been canceled, and the process returns to step 101 to display the trip accumulated distance. It should be noted that if the processing of steps 105 and 108 is abolished and after the processing of step 104 or in the state where there is no first operation signal input for a predetermined time in step 103, it is considered that the input of the refueling amount has been completed, and step 107 You may proceed to the processing of.

In step 109, it is judged whether or not the reset operation is performed based on the presence / absence of the input of the second operation signal,
The second operation signal was input, and the reset operation was performed (Y
es), the fuel consumption and trip accumulated distance 1a
Is reset and the process returns to step 101 (see FIG. 5).
(See (d)).

As described above, in this embodiment, the display unit 1
And a control unit 5 for calculating the traveling distance of the vehicle and displaying it on the display unit 1, and an input means 4 for inputting the refueling amount to the control unit 5. The control unit 5 controls the traveling distance and the refueling amount. By calculating the fuel consumption (fuel consumption rate) based on the display and displaying it on the display unit 1, the user can easily know the accurate fuel consumption based on the traveling distance and the fuel consumption amount required to travel the distance. .

Further, in the present embodiment, the control unit 5 is set to calculate and display the fuel consumption even after the key switch 7 of the vehicle is turned off (after being cut off). It is possible to calculate and display the fuel consumption without turning on (turning on), thus improving convenience.

Further, in the present embodiment, the input means 4 is provided by the switch element which is composed of the operating portion 41 and the operating portion 42 and which can be manually input. However, if the amount of refueling to the tank can be input, it can be manually input. Not limited to automatic and automatic, any means can be used. For example, a fuel sensor (not shown) is used as an input means, the fuel sensor detects the amount of refueling into the tank, and outputs it as a refueling amount detection signal to the control unit 5. The control unit 5 is thus input. The fuel consumption may be calculated based on the oil supply amount detection signal.

Further, in the present embodiment, the control section 5 has a reset operation means for outputting a reset signal (second operation signal) for resetting the traveling distance, and the reset operation means manually inputs the reset signal. By having the operation unit 41 and the operation unit 41 of the input means by a common operation member, it is possible to achieve cost reduction and space saving.

[0029]

As described in detail above, the present invention can provide a vehicular display device that can sufficiently achieve the initial purpose and can easily know accurate fuel consumption.

[Brief description of drawings]

FIG. 1 is a front view of a vehicle display device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a block diagram showing a system configuration of the same embodiment.

FIG. 4 is a flowchart showing a fuel consumption calculation / display flow of the control unit according to the embodiment.

5 (a) to 5 (d) are front views showing the operation of the display unit according to the fuel consumption calculation / display flow of FIG.

[Explanation of symbols]

1 Display 1a Trip total distance 2 panel side 3 windows 4 Input means (reset input means) 5 control unit 6 vehicle speed sensor 7 key switch 8 battery 41 Operation part 42 Actuator

Claims (4)

[Claims] 1. A display unit, a control unit for calculating at least a mileage of a vehicle and displaying the mileage on the display unit, and an input unit for inputting a refueling amount to the control unit. A display device for a vehicle, wherein a fuel consumption rate is calculated based on the refueling amount and displayed on the display unit. 2. The vehicle display device according to claim 1, wherein the control unit calculates and displays the fuel consumption rate even after the key switch of the vehicle is shut off. 3. The vehicle display device according to claim 1, wherein the input unit has an operation unit for manually inputting the refueling amount. 4. A reset operation unit that outputs a reset signal for resetting the travel distance to the control unit,
4. The vehicle according to claim 3, wherein the reset operation means has an operation part for manually inputting the reset signal, and the operation part and the operation part of the input means are configured by a common operation member. Display device.