JPH0710254Y2 - Instant fuel consumption display - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an instantaneous fuel consumption display device for displaying a mileage per unit fuel, that is, an instantaneous fuel consumption, which changes momentarily.

[Conventional technology]

Since the instantaneous fuel consumption can be measured only when the vehicle is running (or when it is running), the display when the vehicle is stopped is meaningless. For this reason, conventionally, there has been used a display for displaying the fuel consumption, which is capable of displaying other than the fuel consumption, such as a calendar (date) and a clock (time) by manual switching. FIG. 6 shows an example of such a conventional device, which is a predetermined RO (not shown).
The flow rate signal from the flow rate sensor 2 and the speed signal from the speed sensor 3 are fetched into the microcomputer (CPU) 1 that operates according to the control program stored in M, and the instantaneous fuel consumption is measured in the fuel consumption measuring unit 1a of the CPU 1 based on these signals. The instantaneous fuel consumption data is generated by measuring and generating the instantaneous fuel consumption data, and also by generating the calendar data in the calendar function unit 1b of the CPU1 and turning on the changeover switch 4 connected to the CPU1 as shown in FIG. 7 (a). The instantaneous fuel consumption is sent to the display device 5, and the calendar data is sent to the display device 5 by turning off the changeover switch 4 as shown in FIG. 7 (b) to display the date on the display device 5, respectively. I am trying to let you.

In order to perform the above operation, the CPU 1 executes the work shown in FIG. 8 according to the control program. That is, in step S1, the state of the changeover switch 4 is monitored to determine whether the changeover switch 4 is on or off. If the result of determination in step S1 is that the changeover switch 4 is on, the process proceeds to step S2, where the display 5
The instantaneous fuel consumption data generated by the fuel consumption measuring unit 1a is sent to the display unit to display the instantaneous fuel consumption. On the other hand, if the result of the determination in step S1 is that the switch 4 is off, the process proceeds to step S3, where the calendar data generated by the calendar function unit 1b is sent to the display unit 5 to display the date. Let

[Problems to be solved by the device]

In the above-mentioned conventional apparatus, the display content displayed on the display 5 is switched depending on the state of the changeover switch 4. Therefore, depending on the state of the change-over switch 4 before the vehicle is driven, the display 5 can be operated even after the vehicle is driven.
May be displayed in the calendar. In such a case, when it is desired to know the instantaneous fuel consumption, the changeover switch 4 must be operated to change the display.
Such an operation during driving is unfavorable with a temporary side-by-side driving.

Therefore, an object of the present invention is to provide an instantaneous fuel consumption display device that solves the above-mentioned problems of the related art and can automatically display the fuel consumption whenever it is necessary to know the fuel consumption.

[Means for Solving the Problems]

In order to solve the above problems, the instantaneous fuel consumption display device made by the present invention generates instantaneous fuel consumption data generated by the fuel consumption measuring section 1a and calendar means or clock means 1b as shown in the basic configuration diagram of FIG. In the instantaneous fuel consumption display device in which one of the date display data and the time display data is selected and input to the display 5 to selectively display the instantaneous fuel consumption or the date or time, the vehicle is operated for a certain period of time. When the distance measured by the distance measuring means 1a for measuring the distance traveled in, and the distance measured by the distance measuring means is a predetermined value or more, the instantaneous fuel consumption data is output to the display device, and when the distance is less than a predetermined value, the year The display switching control means 1d for outputting the date display data or the time display data to the display is provided.

(Operation) In the above-mentioned configuration, the display switching control means 1d displays the instantaneous fuel consumption data when the traveling distance measured by the distance measuring means 1c within a certain time is a predetermined value or more, that is, when the vehicle speed is a certain value or more. Output to 5 to display the instantaneous fuel consumption,
When it is less than a predetermined value, the date display data or the time display data is output to the display unit to display the date. Therefore, when the vehicle travels where it is necessary to know the instantaneous fuel consumption, the instantaneous fuel consumption display is automatically performed without performing any troublesome and undesirable operation, so that the driver can see the displayed instantaneous fuel consumption. By knowing the change in fuel consumption due to the way of driving the vehicle, it is possible to know the information for performing the preferable driving in terms of fuel efficiency.

Also, when the vehicle is stopped or below the predetermined vehicle speed,
Instead of the instantaneous fuel consumption display that cannot be used even if displayed, the date display and time display that are completely unrelated to the running of the vehicle but can be used effectively are automatically performed without any troublesome operation. Therefore, the display space of the display can be effectively used.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing an embodiment of an instantaneous fuel consumption display device according to the present invention. Although the device shown in FIG. 2 is different from the device shown in FIG. 6 in the work performed by the CPU 1, the changeover switch 4 is omitted in terms of hardware. 6 is the same as the apparatus described above with reference to FIG.

In the device shown in FIG. 2, the CPU 1 operates according to a predetermined control program as in the device shown in FIG.
From the fuel cell and the speed signal from the speed sensor 3, and based on these signals, the fuel consumption measuring unit 1a measures the instantaneous fuel consumption, and instantaneous fuel consumption data is generated. The fuel consumption measuring unit 1a calculates the instantaneous fuel consumption in the following formula.

Instant fuel consumption = mileage / fuel consumption If the vehicle is equipped with a diesel engine, measure the instantaneous fuel consumption as follows. In a diesel engine, a part of the fuel flowing into the engine inlet is consumed by the engine, and the rest is returned from the engine outlet. Therefore,
The amount of fuel actually consumed in the engine is obtained from the difference between the flow rate signals from the flow rate sensors 2 provided at the engine inlet and the outlet, respectively. The traveling distance can be measured by the number of pulses from the speed sensor 3, for example.

The CPU 1 has a calendar function unit 1b that generates calendar data.

In the above configuration, the instantaneous fuel consumption data generated by the fuel consumption measuring unit 1a is displayed based on the speed signal from the speed sensor 3 when the vehicle travels a certain distance L (m), for example 2 m or more within a certain time T (sec), for example 10 seconds. It is output to the device 5 to display the instantaneous fuel consumption. On the other hand, a fixed time T (sec)
When the vehicle is not traveling for a certain distance L (m) or more, the calendar data generated by the calendar function unit 1b is output to the display device 5 to display the date.

In order to perform the above-described operation, the CPU 1 executes the work shown in FIG. 3 according to a control program stored in a ROM (not shown) which is predetermined.

That is, in step S11, a timer (not shown) incorporated in the CPU 1 determines whether or not a certain period of time has elapsed since its activation. When the fixed time has elapsed and the determination in step S11 is YES, the process proceeds to step S12, where it is determined whether the traveling distance after the timer is activated is L or more or L or less. When the mileage is L or more as a result of the determination in step S12, the process proceeds to step S13, in which the instantaneous fuel consumption data measured and generated by the fuel consumption measuring unit 1a is output to the display 5 to display the instantaneous fuel consumption. Then, the process returns to step S11. If the mileage determined in step S12 is less than or equal to L, the process proceeds to step S14, in which the calendar data generated by the calendar function unit 1b is output to the display unit 5 and the date is displayed. Return to S11.

When the determination in step S11 is NO, that is, when a fixed time has not elapsed from the start of the timer, the process waits until the determination in step S11 is YES, and the timer is set to
It will be restarted when S14 is executed.

In the above-described embodiment, the instantaneous fuel consumption is automatically displayed when the vehicle is traveling (or when the vehicle is traveling), and the calendar is automatically displayed when the vehicle is not traveling. You may be able to switch to the calendar display for a certain time by manual operation when displaying the instantaneous fuel consumption,
4 and 5 show the embodiment.

In the present embodiment, as shown in FIG. 4, a switch 6 that is turned on only when operating is connected to the CPU 1, and when this switch 6 is operated, the display 5 indicates a fixed time even if the vehicle is running. I am trying to display it. For this, CPU1
As shown in FIG. 5, the work to be executed by step S11 is NO when the determination in step S11 is YES to determine whether a predetermined time has elapsed since the timer was started. Judgment, the judgment in step S15 is Y
In the case of ES, the process proceeds to step S14, where the display 5 is caused to display a calendar. Since the timer is restarted when this step S14 is executed, if the vehicle is traveling, the instantaneous fuel consumption will be displayed on the display 5 after a certain period of time.

Further, in the above-described embodiment, the example of the calendar display is shown as another display, but this may be a clock display, for example.

〔effect〕

As described above, according to the present invention, the instantaneous fuel consumption is automatically displayed when it is determined that the vehicle travels within a certain period of time and exceeds a predetermined value, and when the vehicle is stopped or below a predetermined vehicle speed, the annual fuel consumption is displayed. Since the date and time are automatically displayed, the instantaneous fuel consumption display can be obtained without any troublesome and undesired operation when the vehicle is driven when it is necessary to know the instantaneous fuel consumption. By looking at the instantaneous fuel consumption, it is possible to know the change in fuel consumption depending on the driving method of the vehicle and obtain information for driving that is preferable in terms of fuel efficiency, and even when it is stopped or below a predetermined vehicle speed, it is useful even if it is displayed. Instead of the instantaneous fuel consumption display that cannot be performed, the date and time display that can be effectively used is displayed without any troublesome operation, and the display space of the display unit Preferred instantaneous fuel consumption display device that can be effectively utilized is obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing the basic configuration of an instantaneous fuel consumption display device according to the present invention, FIG. 2 is a block diagram showing an embodiment of the instantaneous fuel consumption display device according to the present invention, and FIG. 3 shows the CPU in FIG. FIG. 4 is a flow chart showing the work to be performed, FIG. 4 is a block diagram showing another embodiment of the instantaneous fuel consumption display device according to the present invention, FIG. 5 is a flow chart showing the work performed by the CPU in FIG. 4, and FIG. FIG. 7 is a block diagram showing an example of a conventional device, FIG. 7 is a diagram showing a display example of the device of FIG. 6, and FIG. 8 is a flow chart diagram showing the work performed by the CPU in FIG. 1a: fuel consumption measuring unit, 1b: calendar means or clock means (calendar function unit), 1c: distance measuring means (CPU), 1d
...... Display switching control means (CPU), 5 ... Display.

Claims (1)

[Scope of utility model registration request] 1. An instantaneous fuel consumption data generated by a fuel consumption measuring unit,
Instantaneous fuel consumption display by selecting either the date display data or time display data generated by the calendar means or the clock means and inputting to the display unit to selectively display the instantaneous fuel consumption or the date or time In the device, a distance measuring means for measuring a traveling distance of a vehicle within a certain time, and when the distance measured by the distance measuring means is a predetermined value or more, the instantaneous fuel consumption data is output to the display device, An instantaneous fuel consumption display device, comprising: display switching control means for outputting the date display data or the time display data to the display device when the value is less than or equal to a value.