JP3449073B2 - Meter device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a meter device,
In particular, the present invention relates to a meter device capable of changing its function without hardware modification.

[0002]

2. Description of the Related Art Some vehicle speedometers are equipped with a speed over warning function (speed warner) and some are not equipped with this function. It is selected by switching the jumper line above. Also, the display of the rotation speed of the vehicle tachometer is dealt with by switching the CPU port by a jumper wire according to the number of cylinders of the mounted engine.

[0003]

However, in such a structure, when it is desired to add an alarm function, it is necessary to replace the entire meter or modify the inside of the meter. Also, since the tachometer unit is different, it is necessary to prepare various meter devices according to the number of cylinders of the vehicle,
It took time to manage the parts, and there was a risk of incorrect installation on the vehicle.

The present invention solves such a problem, and provides a meter device which can be applied to a wide range of vehicle types without replacement of the meter or internal modification, and does not require labor for parts management. The purpose is to do.

[0005]

In order to achieve the above-mentioned object, the invention according to claim 1 provides a key switch for a vehicle.
After the power is turned on, the display switching / resetting means (1, 11
5) Display switching or trip data recovery
Before the setting can be performed, the switch
Switch (SW1) and reset switch (SW2) are the same
A mode switching unit (1, 105) for switching the function mode according to an unusual operation that is sometimes operated is provided. Therefore, if the function mode at this time is set to the presence or absence of the speed warner, the presence or absence of the speed warner can be switched and selected by operating the operation switch, and it is not necessary to replace the meter or perform internal modification. Further, it is not necessary to prepare and store the two kinds of meter devices depending on the presence or absence of the speed warner in advance, so that labor for managing parts is not required.

According to the second aspect of the invention, since the mode display means (1, 103) is provided, the odd / trip display section (D5) shows what the switched function mode is.
You can easily check above.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention shown in the drawings will be described. FIG. 1 shows a block configuration of the meter device. The meter device has a CPU 1, and a vehicle speed signal and a tachometer signal are input to an RT11 terminal and an RT12 terminal thereof via an interface circuit 2A, respectively.

Further, the water temperature signal and the fuel remaining amount signal are input to the AD1 and AD2 terminals of the CPU 1 through the interface circuits 2C and 2D, respectively, and further to the P1 terminal and the P2 terminal through the interface circuits 2E and 2F. , "O
The signal of the switch SW1 for changing “DO / TRIP” and “R
The signal of the switch SW2 for "ESET" is input. A non-volatile memory (NVM) 11 for storing a display mode, which will be described later, is connected to the CPU 1, a display device 3 is connected via a display drive circuit 31, and a speed alarm chime 4 is connected via a chime drive circuit 41. Has been done. The display 3 displays the vehicle speed, the engine cooling water temperature, the engine speed, the remaining fuel amount, and the odometer and trip meter (O
Each display of (DO / TRIP) is made.

FIG. 2A shows the front surface of the panel 32 of the display device 3, and the vehicle speed display portion D is provided above and below the center of the panel 32, respectively.
1 and an engine speed (tachometer) display portion D2 are provided, and an engine cooling water temperature display portion D3 and a fuel remaining amount display portion D4 are provided at the left and right ends of the panel 32, respectively. Further, an "ODO / TRIP" display portion D5 is provided at the lowermost right position on the front surface of the panel 32, and an "ODO / TRIP" switching switch SW1 and a "RESET" switch SW2 are provided on the right side thereof. The "SCALE CHANGE" switch SW3 changes the scale width of the remaining fuel amount.

Note that FIG. 2 (a) shows a state in which the display segment of each display unit is turned on, FIG. 2 (b) shows an odometer display, and FIG. 2 (c) resets the "TRIPA" display. In addition, the scale width of the remaining fuel amount was changed. 3 and 4 show the processing procedure of the CPU 1 after the power is turned on by the key switch. In step 101, internal registers and ports are initialized, and in the following step 102, it is confirmed whether the switches SW1 and SW2 are simultaneously pressed. When an abnormal operation is performed in which the switches SW1 and SW2 are simultaneously pressed, the process proceeds to step 103 and the display 32
Display the function mode as described below. The displayed function modes are sequentially switched each time the switch SW1 is pressed (steps 104 and 105). When the switch SW2 is pressed, the function mode displayed at this time is written in the NVM 11 (step 106).

In the present embodiment, as the above-mentioned function modes, an overspeed alarm (speed warner) and cylinder setting for the tachometer are made, and the display of these function modes is shown in FIG.
As shown in FIG. 5, the "ODO / TRIP" display portion D5 is displayed. Here, in FIG. 11A, there is no speed warner (S
6 cylinders (06) with P0), 4 cylinders (04) with speed warner (SP1) in FIG. 11 (b), 8 cylinders (08) without speed warner (SP0) in FIG. 11 (c) The function mode is displayed.

In step 107, the functional mode written in the NVM 11 is read. If the switches SW1 and SW2 are not pressed simultaneously in step 102, the process directly proceeds to step 107. In step 108, the function mode is set on the RAM in the CPU 1. At this time, the speed warner is set to FSPWMOD.
Depending on the flag, the cylinder setting for the tachometer is FREVMO.
This is done by the D flag. After that, it is confirmed in step 109 whether an interrupt has occurred.

Step 11 by interruption every 20 ms
Proceeding to 0, the necessary data is displayed on the display device 3 via the display drive circuit 31. In step 111, FSPWMO
Check if the D flag is set, and if not, turn off the output of the speed warner. If the FSPWMOD flag is set, in step 112, S
It is confirmed by the PW flag whether or not the alarm speed is exceeded, and if the SPW flag is set, the output of the speed warner is turned on and the speed alarm chime 4 is sounded via the chime drive circuit 41.

In addition, at the interrupt of every 100 ms, the switch (SW) processing routine of step 115, step 1
The water temperature gauge processing routine of 16 and the fuel processing routine of step 117 are each executed, and the vehicle speed processing routine is executed at every 300 ms interruption. Further, the tachometer processing routine is executed in synchronization with the generation of the engine rotation signal, and the distance integration processing routine is executed in synchronization with the generation of the vehicle speed pulse signal.

The details of the switch processing routine are shown in FIG. In step 201, the inputs of the switches SW1 and SW2 are fetched, and in step 202, it is confirmed whether or not the switch has been turned on twice consecutively. When the switch SW1 is operated twice consecutively, the OD is performed in step 203 each time.
The display can be switched between O, TRIPA, and TRIPB.
If the switch SW2 is operated twice in succession, the TRIP display is displayed (step 204).
The displayed trip data is cleared (step 205).

The details of the water temperature gauge processing routine are shown in FIG.
The water temperature data is taken in at step 301, and this is repeated 16 times to average the water temperature data (step 302,
303) and determine the water temperature display data (step 30)
4). The details of the fuel processing routine are shown in FIG. In step 401, the fuel data is fetched, and this process is repeated 128 times to average the fuel data (steps 402, 40).
3) The fuel display data is determined (step 404).

FIG. 8 shows details of the vehicle speed processing routine.
In step 501, the vehicle speed is calculated, and then the displayed vehicle speed VSP
To decide. And this display vehicle speed VSP is 105 km
If it is larger than / h, the above-mentioned SPW flag is set. If the displayed vehicle speed VSP is smaller than 105 km / h, the SPW flag is reset. FIG. 9 shows the details of the tachometer processing routine. In step 601, the time between signals of the engine rotation signal is calculated, and then FREVMO is calculated.
With reference to the D flag, four cylinders, six cylinders, and eight cylinders are discriminated (step 602), and converted into engine speed display data for each cylinder (steps 603 to 605). Then, in step 606, the display rotation speed is determined.

FIG. 10 shows the details of the distance integration processing. In steps 701 to 703, ODO, TRIPA, and
Performs distance integration for TRIPB. As described above, in the present embodiment, the presence or absence of the speed warning function of the meter device and the setting of the number of cylinders for the tachometer can be set by software by an abnormal operation of simultaneously operating the two switches SW1 and SW2. . Therefore, it is not necessary to replace the meter or modify the inside of the meter according to the type of vehicle on which it is installed, and it is possible to flexibly cope with a wide range of vehicle types, and no labor for parts management is required.

The display section for displaying the function mode is "O".
The vehicle speed display portion D1 and the like may be used instead of the “DO / TRIP” display portion. Also, as a function mode setting switch, an "ODO / TRIP" switch and a "RES"
Not limited to ET switch, "SCALE CHAN"
You may use the switch for "GE". Further, the function mode is not limited to the presence / absence of the speed warning function and the setting of the number of cylinders for the tachometer. For example, a function of changing the vehicle speed set value for speed warning, a function of displaying the presence / absence of ABS, or the like can be considered.

[Brief description of drawings]

FIG. 1 is a block circuit configuration diagram of a meter device according to an embodiment of the present invention.

FIG. 2 is a panel front view of a meter device display unit according to an embodiment of the present invention.

FIG. 3 is a processing flowchart of a CPU according to the embodiment of the present invention.

FIG. 4 is a processing flowchart of a CPU according to the embodiment of the present invention.

FIG. 5 is a processing flowchart of a CPU according to the embodiment of the present invention.

FIG. 6 is a processing flowchart of a CPU according to the embodiment of the present invention.

FIG. 7 is a processing flowchart of a CPU according to the embodiment of the present invention.

FIG. 8 is a processing flowchart of a CPU according to the embodiment of the present invention.

FIG. 9 is a processing flowchart of a CPU according to the embodiment of the present invention.

FIG. 10 is a processing flowchart of a CPU according to the embodiment of the present invention.

FIG. 11 illustrates an “ODO / T according to an embodiment of the present invention.
It is an enlarged front view of a "RIP" display part.

[Explanation of symbols]

1 ... CPU, 3 ... indicator, D5 ... "ODO / TRIP"
Display unit, SW1 ... "ODO / TRIP" switch, SW2 ... "RESET" switch.

─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP-A-6-305311 (JP, A) JP-A-5-157563 (JP, A) JP-A-7-230286 (JP, A) JP-A-7- 156690 (JP, A) JP-A-4-273016 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01D 7/00

Claims (2)

(57) [Claims] 1. An odd display on a meter display (3) of a vehicle.
/ Off to switch the display of the trip display (D5)
The trip switch is displayed on the replacement switch (SW1 ) and the odd / trip display section.
When the trip data displayed is reset
A reset switch (SW2) for said under predetermined function mode in response to the normal operation of the changeover switch or the reset switch odo / trip
Display of switching or the trip data of up display unit
Display switching / reset means for performing a reset (1, 11
5) and, after the power is turned on by the key switch of the vehicle, the display switching /
Switching of the display by the reset means or the
At a point before you can reset the lip data
The changeover switch and the reset switch
And a mode switching means (1, 105) for switching the function mode according to an abnormal operation in which the meter is operated at the same time . 2. The functional mode switched by the mode switching means (1, 105) is set to the odd / trial mode.
Tsu claims by utilizing a display of up display unit is characterized in that further provided mode display means (1,103) for displaying
The meter device according to 1 .