JPH11258025A - Residual fuel display apparatus for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the display of a residual fuel accurate by providing a function for deciding the display value of residual fuel just after turning on of an ignition(IGN) and a processing function for quickening the response ability of a display so as to follow the variation of an oil feed quantity in the case of feeding the oil by turning on IGN. SOLUTION: IGN.SW1a, a residual fuel detecter 1b and a car speed detecter 1c are connected to a controller 1 consisting of a microprocessor or the like, and the residual fuel quantity is displayed by analog or digital quantity on a residual fuel display apparatus 1d. In the case where the fuel is fed as a car stops and IGN is turned on after ending of an running preparation after the turning on of IGN, the response ability of display is quickened so that the display apparatus 1d may follow the variation of an oil feed quantity, and on the other hand, during running, the response ability is made slower to remove the glittering of the display. Thus a display having no disorder feeling can be obtained according to a user's using state, and moreover the display to accurately follow the oil feed quantity can be secured even in the case of the turning on or off of IGN.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remaining fuel display device for a vehicle, which displays a remaining fuel amount in a fuel container of the vehicle.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. 4-225120 and Unexamined Published Japanese Patent Application No.
4 and the like are given as conventional examples.

[0003]

In each of the above two examples of the prior art, as shown in FIG. 4, an ignition switch (IGN SW) (1a) is provided to a controller (1) comprising a microprocessor or the like. ), Residual fuel detector (1
b) and the vehicle speed detector (1c) are connected, the remaining fuel value is displayed on the remaining fuel indicator (1d) in an analog or digital quantity, and a filler port / switch (2a) is provided at the filler port. A fuel inlet operation storage device (2) for judging whether or not the fuel filler / switch is used during the vehicle-unused IGN-off period is provided, and wired to the controller (1).
Even when the GN is off, it is necessary to turn on the power to the fuel filler, the switch, and the operation storage device, and a function for canceling the memory when the IGN is turned on is required. It required additional wiring to the vehicle, and had problems that could not be handled by general vehicles in general.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a vehicle residual fuel display device according to the present invention eliminates the need for a fuel filler, a switch and its operation storage device, and turns off an ignition (IGN). It is determined by the remaining fuel value comparing means before and after whether fuel was supplied during the non-use of the vehicle in the state, and
If the vehicle has a function to determine the remaining fuel display value in the initial state of travel preparation immediately after N-on and the vehicle is stopped and refueled with IGN on after completion of travel preparation after IGN-on,
The response of the display is made faster so that the display can follow the change in the refueling amount, and the response is slowed down when there is no refueling or when the vehicle is running to eliminate the flickering of the display. It is characterized by having a processing function.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle residual fuel display device according to the present invention comprises an ignition (IGN) switch, a residual fuel detector, and a vehicle speed detector connected to a controller comprising a microprocessor or the like. And a detection signal, etc., and the remaining fuel value is displayed in an analog or digital amount on the remaining fuel display.
When IGN is on, the last remaining fuel storage value A
Has the function of comparing the current fuel measurement value B with the current remaining fuel value B to determine and display the refueling from the time of the last IGN-off to the time of the current IGN-on. If the vehicle is stopped and refueled with the IGN on, the response of the display is accelerated so that the display can follow the change in the refueling amount, while the refueling is not performed.
Alternatively, when the vehicle is running, the system has a function of performing a process of reducing responsiveness in order to eliminate display flicker.

In the vehicle residual fuel display device of the present invention,
As a flowchart of the traveling preparation initial refueling determination process, in step S1, when IGN is turned on, the process proceeds to step S2,
Here, A indicates the remaining fuel storage value stored in the controller immediately before the IGN was turned off at the time of use of the last ride, and B
Indicates the remaining fuel measurement value at the present time, and the upper limit value (L) is the upper limit value of the fluctuation deviation of the remaining fuel measurement value due to the inclination of the vehicle or the like.
When refueling by GN ON, B> A,
Since the condition B−A ≧ L is satisfied, the process proceeds in the YES direction and in step S3, B is selected as the remaining fuel display value, and step S4 is performed.
To display the B value on the remaining fuel indicator, and if the fuel has not been refueled from the last time IGN was turned off to the time this time IGN is turned on,
A and B show substantially the same value, and the difference is within the upper limit L of the fluctuation deviation amount of the remaining fuel measurement value.
<L, the control proceeds in the NO direction, and in step S3, A is selected as the remaining fuel display value, and in step S4, the A value can be displayed on the remaining fuel display.

In the vehicle residual fuel display device of the present invention,
As a flowchart of the refueling determination process during traveling, IGN
In the state after the completion of running preparation after turning on, in step T1,
As a determination means for determining whether in or parked cars, with respect to the vehicle speed limit value V _min of the maximum speed of the vehicle is stopped, the vehicle speed ≧ V
If _min, and the flow proceeds to YES direction regarded as running, at step T4, the average value of the remaining fuel measured value B obtained by sampling several times, slow response time: the feed to step T5 in delayed response time T _s, the residual fuel display On the other hand, in step T1,
If the vehicle speed <V _min, the process proceeds to NO direction regarded as parked, in step T2, parked from traveling, the liquid surface of the fuel Wait time limits t _min is the upper limit that stable, the number of the point The average value of the remaining fuel measurement values B sampled twice is stored as the remaining fuel storage value A, and the elapsed time after stopping ≧ t
If it is _min , the process proceeds in the YES direction, while if it shifts to the running state at the time elapsed after stopping < _tmin , the process proceeds in the NO direction, and in step T4, the average value of the sampling measurement B is calculated as the delay response time T _s. In step T5, the remaining fuel indicator is displayed on the remaining fuel indicator. On the other hand, in step T2, if the process proceeds in the YES direction and reaches step T3, the remaining fuel storage value A stored in step T2 and the present remaining fuel measurement value B If the condition B−A ≧ L is satisfied, it is determined that refueling is being performed, and the process proceeds in the YES direction. At step T4, the sampling measurement is performed in sequence so that the display can follow the refueling amount during refueling. The average B value is sent to the stage T5 at a fast response time: a quick response time _Tf and displayed on the remaining fuel indicator, while at the stage T3, B−A <L
, It is determined that fuel is not being refueled, and the process proceeds in the NO direction. At step T4, the update of the display data is delayed to reduce the fluctuation.
The sampling measurement B average, feed to step T5 in delayed response time T _s, can also be displayed on said residue fuel indicator.

In the vehicle residual fuel display device of the present invention,
The time point at which the vehicle is returned to the IGN-off state in the vehicle use end preparation state is step T2 in the flowchart of the above-described traveling oil determination process. In step T1, the vehicle stops and proceeds in the NO direction. The process waits for the upper limit time limit value t _{min at} which the surface is stabilized, and ends with IGN off with the average value of the remaining fuel measurement values B sampled several times at this time stored as the remaining fuel storage value A.
If the ignition is turned off without waiting until the time limit value t _{min, the} average value of the sampling measurement B immediately before the ignition is turned off is stored as the remaining fuel storage value A, and the cancellation condition of the storage value A is that the next vehicle speed ≧ V _It can be at the time of detecting the _min condition.

In the remaining fuel display device for a vehicle according to the present invention,
The upper limit value (L) is determined by the upper limit value of the fluctuation deviation of the remaining fuel measurement value due to the inclination of the vehicle, etc., and is an amount that changes depending on the vehicle type, the remaining fuel detector or the type of the indicator, and is set in advance depending on the vehicle type. You can do it.

In the vehicle residual fuel display device of the present invention,
As a determination means for determining whether in or parked cars, the vehicle speed limit value V _min of the upper limit of the vehicle speed parked as a reference, and V _min = number km / h, if the vehicle speed <V _min, and during vehicle stop determination You can do it.

In the vehicle residual fuel display device according to the present invention,
Time limit value t _min at which the fuel level becomes stable after stopping
Can be adopted as a few seconds.

The vehicle residual fuel display device of the present invention does not require any additional wiring to the fuel filler for various vehicles, and does not require any power supply to the vehicle during the IGN off period. Compatible with all.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
FIG. 2 is a block diagram of a remaining fuel display device for a vehicle, FIG. 2 is a schematic flowchart of a running preparation initial refueling determination process of the remaining fuel display device for a vehicle, and FIG. It is. For comparison, FIG. 4 shows a configuration diagram of a vehicle residual fuel display device according to the prior art.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described below. As shown in FIG. 1, a vehicle remaining fuel display device includes an ignition switch (1) including a microprocessor or the like. IGN SW) (1a), the remaining fuel detector (1b) and the vehicle speed detector (1c) are connected,
It is characterized in that the remaining fuel value is displayed as an analog or digital quantity on the remaining fuel indicator (1d) and is constituted.

In the vehicle remaining fuel display device of the present invention,
FIG. 2 shows a schematic flowchart of the traveling preparation initial refueling determination process, in which it is determined whether or not fuel has been refueled while the vehicle is not in use with the ignition (IGN) off.
For the purpose of determining the remaining fuel display value in the initial state of traveling preparation immediately after turning on, starting from step S0 state, in step S1, when IGN is turned on, proceed to step S2, where A is the last use of the vehicle. Indicates the remaining fuel storage value stored in the controller (1) immediately before the IGN is turned off at the time, B indicates the current fuel remaining measurement value, and the upper limit value (L) indicates the vehicle limit. It is determined by the upper limit of the fluctuation deviation of the remaining fuel measurement value due to the inclination of the vehicle, and varies depending on the vehicle type, the remaining fuel detector or the type of the indicator. When refueling by the time of ON, B> A, and the condition B-A
Since it satisfies ≧ L, the process proceeds in the YES direction, B is selected as the remaining fuel display value in step S3, and the B value is displayed on the remaining fuel indicator (1d) in step S4. If not refueled by the time IGN is turned on, A and B
Indicate substantially the same value, and the difference is within the upper limit value L of the fluctuation deviation amount of the remaining fuel measurement value, so that B−A <L, and proceed in the NO direction. In step S3, A is displayed as the remaining fuel display value. Is selected, and the A value is displayed on the remaining fuel indicator in step S4.

In the vehicle remaining fuel display device of the present invention,
FIG. 3 is a schematic flowchart of the refueling determination process during traveling. In the state after the preparation for traveling after IGN is turned on, when the vehicle is actually in use, the vehicle is stopped, and refueling is performed with IGN on, the refueling amount is shown. The response of the display is accelerated so that the display can follow the change in the remaining fuel indicator (1d). On the other hand, when the fuel is not refueled or the vehicle is running, the response is slowed down to eliminate flickering of the display. Stage T
Starting from 0 state, in step T1, a determination means for determining whether the vehicle is stopped during running, with reference to the vehicle speed limit value V _min of the maximum speed of the vehicle is stopped, if the vehicle speed ≧ V _min, and during travel deemed proceeds to YES direction, at step T4, the average value of the remaining fuel measured value B obtained by sampling several times, slow response time: the feed to step T5 in delayed response time T _s, and displays the remaining fuel indicator (1d), On the other hand, in the stage T1, the vehicle speed <V
If it is _min , it is regarded as stopped and proceeds in the NO direction.
In 2, the stop from traveling, the liquid surface of the fuel Wait time limits t _min is the upper limit that stabilizes, the average value of the remaining fuel measured value B which is several times the sampling of the time as a remaining fuel stored value A If the elapsed time after stopping is equal to or greater than t _min , the process proceeds in the YES direction, while the time elapsed after stopping is less than t
When migrating to the running state _min, the process proceeds to NO direction, at step T4, the sampling measurement B average, feed to step T5 in delayed response time T _s, and displays on said residue fuel indicator, whereas, stage T3 Is reached, the remaining fuel storage value A stored in step T2 is compared with the remaining fuel measurement value B at the present time. If the condition B−A ≧ L is satisfied, it is determined that refueling is in progress.
In the ES direction, in step T4, the average value of the sampling measurement B at each time is sent to the step T5 with a fast response time: a quick response time _Tf so that the display can follow the refueling amount during refueling, and then to the step T5. On the display, while at step T3,
If B−A <L, it is determined that refueling is not being performed, and the process proceeds in the NO direction. In step T4, the update of the display data is delayed to reduce fluctuations, and the average value of the sampling measurement B is calculated as the delay response time T _It is characterized in that it is sent to step T5 in _s and displayed on the remaining fuel indicator.

In the vehicle residual fuel display device according to the present invention,
The time point when the vehicle is returned to the IGN-off state in the vehicle use end preparation state is step T2 in the schematic flowchart of the running oil determination process in FIG.
In step T2, the vehicle stops and waits until the upper limit time limit value t _min at which the fuel level is stabilized. At this time, the average value of the remaining fuel measurement values B sampled several times is stored in the remaining fuel storage value A. When the IGN is turned off without waiting until the time limit value _{tmin, the} average value of the sampling measurement B immediately before the IGN is turned off is stored as the remaining fuel storage value A. The cancellation condition of the stored value A is characterized in that the next time vehicle speed ≧ V _min condition is detected.

In the vehicle residual fuel display device of the present invention,
The upper limit value (L) is determined by the upper limit value of the fluctuation deviation of the remaining fuel measurement value due to the inclination of the vehicle, etc., and is an amount that changes depending on the vehicle type, the remaining fuel detector or the type of the indicator, and is set in advance depending on the vehicle type. Yes, when the remaining fuel value is displayed as an analog quantity on the full-scale 80-degree remaining fuel indicator (1d),
The limit value (L) is 14.3 degrees, and when this value is converted into a display digital amount, it corresponds to the limit value (L) of the 8.56 liter fuel amount.

In the vehicle residual fuel display device of the present invention,
When the average value of the sampled remaining fuel measurement values B is displayed on the remaining fuel indicator (1d) or stored as the remaining fuel storage value A, the displayed / stored value is based on the average value sampled four times every 50 msec. Was secured.

In the vehicle residual fuel display device of the present invention,
As a determination means for determining whether the vehicle is running or stopped, the vehicle speed limit value _Vmin, which is the upper limit of the vehicle speed during stoppage, is used as a reference, and _Vmin =
5.7 km / h was adopted, and if the vehicle speed was less than _Vmin , it was determined that the vehicle was stopped.

In the remaining fuel display device for a vehicle according to the present invention,
Time limit value t _min at which the fuel level becomes stable after stopping
Employed 5 seconds.

In the vehicle residual fuel display device of the present invention,
To display the average value of the sampling measurement B at a time with the fast response time: quick response time _Tf on the remaining fuel indicator (1d) so that the display can follow the refueling amount during refueling, full _{Tf is used} as _Tf . In the remaining fuel analog display with a scale of 80 degrees, T _f = 0.5 seconds per degree change is set to an equivalent amount, while the update of the display data is delayed to reduce the fluctuation, and the average value of the sampling measurement B is reduced. when displaying the said residue fuel indicator in delayed response time T _s, as T _s, 1 degree change per T
A considerable amount of _s = 30 seconds was employed.

FIG. 4 shows a configuration diagram of a residual fuel display device for a vehicle according to the prior art. In addition to the configuration of the present invention, a filler port / switch (2a) is provided at the filler port, and Equipped with a filler opening operation storage device (2) to determine whether the mouth / switch was used during the vehicle-free IGN off time period, it is necessary to connect wiring to the controller (1), and the IGN off time Even in the band, it was necessary to turn on the power to the operation storage device, and a device for canceling the storage when the IGN was turned on was required.

[0024]

The present invention is embodied in the form described above and has the following effects.

The remaining fuel display device for a vehicle according to the present invention determines whether or not fuel has been supplied while the vehicle is not in use with the ignition (IGN) off, by the remaining fuel value comparing means before and after, and immediately after turning on the IGN. Has a function to determine the remaining fuel display value in the initial state of travel preparation, and when the vehicle is stopped and refueled in the state after the completion of travel preparation after the IGN is turned on, the change in the refueling amount is indicated by the remaining fuel indicator. It has a processing function that hastens the response of the display so that it can follow the display, and has a processing function that slows down the response in order to eliminate flickering of the display when the vehicle is not refueled or running. It is possible to provide a display that does not cause discomfort depending on the situation.
Even if it is turned off, there is an effect that a display that can accurately follow the refueling amount can be secured.

The vehicle remaining fuel display device of the present invention does not require a fuel filler / switch and its operation storage device.
For vehicles of various types, no additional wiring to the filler port is required, and no power supply is required for vehicles during the IGN off-time period. This has the effect of enabling cost reduction.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a remaining fuel display device for a vehicle, showing an embodiment of the present invention.

FIG. 2 is a schematic flowchart of a running preparation initial refueling determination process of the vehicle remaining fuel display device, showing an embodiment of the present invention.

FIG. 3 is a schematic flowchart of a refueling determination process during traveling of the remaining fuel display device for a vehicle, showing an embodiment of the present invention.

FIG. 4 is a configuration diagram of a vehicle remaining fuel display device according to a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Controller 1a Ignition switch 1b Remaining fuel detector 1c Vehicle speed detector 1d Remaining fuel indicator 2 Refueling operation storage device 2a Refueling port switch A Remaining fuel storage value B Remaining fuel measurement value L Limit value Vmin _Vehicle speed limit value _Tf Quick response time T _s Delay response time IGN Ignition SW switch t _min Time limit

Claims (1)

[Claims] An ignition switch (1a), a remaining fuel detector (1b), and a vehicle speed detector (1c) are connected to a controller (1), and respective operation signals and detection signals are input to the controller (1). The remaining fuel indicator (1d) is configured to display the remaining fuel value, and as a running preparation initial refueling determination process, when the ignition switch is turned on, the comparison means is used to compare the previous remaining fuel storage value A with the current remaining fuel value. It has a function of comparing the measured fuel value B and judging and displaying the refueling from the time when the ignition switch was turned off last time to the time when the ignition switch was turned on last time. When the vehicle is stopped and refueled while the ignition switch is turned on via the vehicle speed detection signal in the state after the preparation is completed, the response of the display is accelerated, while the refueling is not performed or the vehicle is running. In the case of, slow response That performs a process, comparison, storage,
And a control unit.