JP3354853B2 - Work vehicle alarm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm device for a work vehicle related to a work of refueling a fuel tank provided in the work vehicle.

[0002]

2. Description of the Related Art In a working vehicle such as a combine or a tractor, when refilling fuel such as light oil into a fuel tank, the remaining amount of fuel in the fuel tank is usually detected by remaining amount detecting means such as a float type sensor. Since the state of the detected remaining fuel is displayed on a pointer-type fuel gauge, a liquid crystal display, or the like, conventionally, a worker performing refueling work enters the tank while watching the remaining fuel level display. Had to refuel.

[0003]

In the above prior art, when trying to put a large amount of fuel into the fuel tank, the worker looks at the inside of the tank from the fuel filler, but the inside of the tank is dark and difficult to see. , It is not easy to determine whether the tank is full of fuel, and despite the tank being full, the tank continues to refill without noticing that, and the fuel overflows from the tank. There was a possibility that the problem described above would occur. On the other hand, in order to avoid a state of running out of fuel in the tank (out of fuel), the remaining amount detecting means is configured to accurately detect a state of low fuel in the tank. In order to accurately detect the full amount of fuel, the work of adjusting the upper limit position of the detection operation range of the sensor to correspond to the full state becomes troublesome. The detection operation range of the fuel cell is mechanically limited, and the maximum detection value of the remaining amount detection means is set to an amount smaller than the full state of the fuel in the tank. Therefore, for example, when the detection value of the remaining amount detection means reaches the maximum detection value,
If it is configured to judge that the fuel in the tank is full, and to alert the worker, the replenishment operation is stopped when the fuel in the tank is less than the full state.

The present invention has been made in view of the above circumstances, and has as its object to use the detection information of the remaining amount detection means so that the fuel in the fuel tank becomes as full as possible. It is an object of the present invention to appropriately prevent the fuel from overflowing due to the excessive filling of the tank with replenishing.

[0005]

According to the first aspect of the present invention, the remaining fuel in the fuel tank provided in the work vehicle has a maximum detection value set to an amount smaller than the fuel full state of the tank. If it is determined that the detection value is detected by the detection means and the detection value of the remaining amount detection means reaches the maximum detection value and the fuel in the fuel tank is in a set state near full, the setting is performed from the time of the determination. After a time delay, it is warned that the fuel in the fuel tank is full.

[0006] Therefore, while the set time elapses from the time when it is determined from the detection information of the remaining amount detecting means that the fuel in the fuel tank has reached a set state near full, fuel supply is continued, When the fuel in the tank becomes full and a full alarm is given after a set time from the time of the above determination, the worker stops refueling, so it is appropriate to overfill the tank and overflow the fuel. To be avoided.

According to a second aspect of the present invention, when the time during which the detected value of the remaining amount detecting means reaches the maximum detected value continues for a set time or more, the set state of the fuel in the fuel tank is almost full. Is determined.

Accordingly, for example, the fuel in the tank fluctuates under the influence of vibration or the like, and the detection value of the remaining amount detection means temporarily reaches the maximum detection value. In a case where the fuel tank does not continue, it is not determined that the fuel in the fuel tank is near the full state, so that the determination that the fuel tank has reached the near full state can be accurately performed. The preferred means of claim 1 is obtained.

According to a third aspect, in the first or second aspect,
The remaining fuel amount in the fuel tank is displayed based on the detection information of the remaining fuel amount in the fuel tank, and the remaining amount display indicates that the full amount information indicating that the fuel in the fuel tank is full is displayed. Is displayed.

Therefore, the worker confirms the fuel increase state in the fuel tank by displaying the remaining fuel amount, and performs the refueling operation properly. In the same remaining amount display, the full amount information can be displayed and the full state can be accurately alerted,
Advantageous measures of claim 1 or 2 are obtained.

According to a fourth aspect, in any one of the first to third aspects,
In the section, when the full state is determined, a sound alerts that the state is full.

Therefore, since the full state is notified by the sound generated from the alarm buzzer or the like, the full state can be accurately determined regardless of the state of the operator's line of sight. The preferred means of any one of claims 1 to 3 is obtained.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a combine as a working vehicle will be described below with reference to the drawings. As shown in FIG. 1, the combine is provided with a reaper 12 at a front portion of a vehicle body V provided with a pair of right and left crawler traveling devices 11, and a control unit 1 behind the reaper.
3, a threshing unit 14 for threshing the grain stalks cut by the cutting unit 12, a Glen tank 15 for storing grains supplied from the threshing unit 14, and the like. An engine E is provided below the driver's seat of the control unit 13, and a fuel tank 16 for the engine E is provided below the floor of the control unit 13 so that fuel such as light oil is supplied from a fuel supply port 16 a. Has become. The cutting unit 12 is provided with a stock sensor S1 that is turned on when the grain stem touches to detect that the cutting operation is being performed.

As shown in FIG. 2, a display panel C for displaying various kinds of operation information to be notified to an operator is provided on the front side of the control unit 13, and its display surface is a dot matrix type. It comprises a liquid crystal display section 1 configured as a graphic display, a charging lamp 2, a preheating lamp 3, an oil lamp 4, a caution lamp 5, a left and right turn signal lamp 6, and the like. The liquid crystal display unit 1 displays operating information such as an hour meter (operating time), an engine speed, and an engine load (see FIG. 4). The oil lamp 4 is turned on when the oil switch is turned on, the charging lamp 2 is turned on when the charging switch is turned on, and the left and right turn signal lamps 6 are turned on when the left and right turn signal lamp switches are turned on.

Although not shown, the control unit 13 includes a vehicle body V
Lever that operates a steering lever that controls steering of the engine, a threshing lever that operates a threshing clutch that switches on and off power transmission from the engine E to the threshing unit 14, and a mower that operates a cutting clutch that switches on and off power transmission from the engine E to the cutting unit 12 A lever and the like are provided. The control section 13 is provided with an accelerator lever for changing and adjusting the number of revolutions of the engine E. Normally, after adjusting the accelerator lever to the start position, the key switch MW described later is switched to the engine start position. After starting the engine E, the operator operates the accelerator lever to increase the output to the rated working speed (for example, 2900 rpm) while watching the display of the engine speed displayed on the liquid crystal display unit 1. .

The display panel C has a built-in meter controller 7 constructed by using a microcomputer. As shown in FIG.
The stock sensor S1, a threshing switch S4 for detecting the on / off state of the threshing clutch, and a fuel tank 16
Each detection information of a float type fuel sensor S2 as a remaining amount detecting means for detecting the remaining amount of fuel in the inside and a rotation speed sensor S3 for detecting the output rotation speed of the engine E are inputted. Here, when the engine E rotates, for example,
If it exceeds 00 rpm, it is determined that the engine E is operating. On the other hand, a drive signal for the liquid crystal display unit 1 and the alarm buzzer 8 is output from the meter controller 7.

The control unit 13 includes an off state in which power supply from a driving power source constituted by a battery (not shown) to each part of the vehicle body is turned off, an on state in which power supply to each part of the vehicle body is turned on, and A key switch MW that can be switched between an engine start state and a start state is provided, and the switch information is input to the meter controller 7. Further, a transmission section for the crawler traveling device 11 is provided with a vehicle speed sensor S5 for detecting a vehicle speed, a neutral switch S6 for detecting a traveling neutral state, and a reverse switch S7 for detecting a reverse traveling state. It is input to the meter controller 7.

The fuel sensor S2 has a float 17 which rises and falls due to a change in the liquid level in the tank 16, and holds the float 17 at the distal end, and the base end rotates around the horizontal axis by the tank upper wall. Arm 17 freely pivoted
a, and a potentiometer 18 for detecting the rotation angle of the arm 17a, and the remaining amount of fuel in the tank is detected by the vertical position of the float 17, that is, the liquid level, which is the detection information of the potentiometer 18. It is configured as follows. Here, the upward rotation of the arm 17a is restricted at a position where the arm 17a hits the stopper 19. At that position, the detection value of the fuel sensor S2 is saturated and becomes the maximum detection value. It is set to an amount smaller than the full fuel state (storage capacity of the tank).

Using the meter controller 7 and the liquid crystal display unit 1, a remaining amount display means 102 for displaying the remaining amount of fuel in the fuel tank 16 based on the detection information of the fuel sensor S2 is constituted. ing. Specifically, FIG.
As shown in FIG. 2, a plurality of display segments seg which can be switched between a light-on state and a light-off state are arranged side by side in a row at the left end of the screen of the liquid crystal display section 1. The right end corresponds to the full fuel remaining side on the fuel remaining decreasing side, and the more fuel remaining, the greater the number of segments that are lit from the left end to the right end. Here, the number of the segment seg is usually four, but when it is determined that fuel is being replenished (during refueling) as described later, as shown in FIGS. It is increased to eight in a state of expanding to.

A full warning means 101 for warning that the fuel in the fuel tank 16 is full is provided. The full warning means 101 gives an alarm by sound to indicate that the fuel tank 16 is full. The display of the remaining fuel amount by the remaining amount display means 102 is configured to display full amount information indicating a full state. Specifically, the alarm buzzer 8 is intermittently operated, for example, five times, and a message of “fuel full” is displayed on the screen of the liquid crystal display unit 1 as full information as shown in FIG.

The meter controller 7 determines whether or not fuel is being supplied to the fuel tank 16 (during refueling) based on the state of increase in the remaining amount of fuel detected by the fuel sensor S2. Is configured. In particular,
The detected value of the remaining fuel amount detected by the fuel sensor S2 is sampled at set time intervals, and the increased state in which the sampled detected value increases from the previous value is the first set number of times (for example, three times). After the continuation, either the increasing state in which the sampled detection value increases from the previous value or the quantifying state in which the sampling value does not increase or decrease continues for a second set number of times (for example, 13 times). Is counted, it is determined that the fuel tank 16 is being refueled. In this embodiment, as will be described later, the output value of the fuel sensor S2 is sampled at intervals of 20 ms, and four data are simply averaged to obtain a remaining amount detection value. The sampling interval of the detection value is 20 ms × 4 = 80 ms.

Here, when the sampled detection value changes from the previous value to the increase side by more than the increase side set value,
When the detected value is determined to be in the increasing state, and when the sampled detected value has changed from the previous value to the decreasing side by a set value on the decreasing side, it is determined that the detected value is in the decreasing state, and The increasing side set value is set to be larger than the decreasing side set value. That is, the output voltage range (for example, 0 to 5 V) of the fuel sensor S2 is set to 256 levels (8
(The number of levels in the bit data), and when each remaining amount detection value rises by more than 8 levels (increasing side set value) with respect to the previous value, it is determined that the state is increasing, and 3 levels (decreasing side setting) Value) or more, it is determined to be in a decreasing state, and between a 7-level rise and a 2-level fall, it is determined to be a quantitative state in which neither increase nor decrease occurs.

However, after counting that the sampled detection value has continuously increased from the previous value by the first set number of times (for example, three times), the state of either the increase state or the quantitative state is determined. The second set number of times (for example, 13 times)
If the sampled detection value decreases from the previous value before counting the continuation, the sampled detection value increases from the previous value continuously for the first set number of times (for example, three times). The process is restarted from the counting process of whether or not.

When it is determined that the fuel is being replenished, the fuel is supplied to the fuel tank 16 to indicate that the fuel is being replenished, as shown in FIG.
A message “refueling” is displayed on the screen of the liquid crystal display unit 1.

Further, in the state where it is determined that the fuel is being supplied to the fuel tank 16 using the meter controller 7, the detection value of the fuel sensor S2 reaches the maximum detection value. When it is determined that the fuel in the fuel tank 16 has reached a set state near full, an alarm control unit 100 that activates the full alarm unit 101 with a delay of a set time (for example, 2 seconds) from the time of the determination. Is configured. Specifically, when the time during which the detected value of the fuel sensor S2 reaches the maximum detected value continues for a set time (for example, 2 seconds) or more, the fuel in the fuel tank 16 becomes a set state near full. It is determined that

The control operation of the meter controller 7 will be described below with reference to the flowcharts of FIGS. In the display and alarm control (FIG. 5), first, when the switching state of the key switch MW is detected, the refueling mode is turned off (released) when the key switch MW is off and the engine is started, and the liquid crystal screen is displayed. The message of "FULL FULL" is erased and the full alarm is stopped. When the key switch MW is on, it is determined whether or not the engine E is stopped by the rotation speed sensor S3 (whether or not the rotation speed is less than 500 rpm), and when the engine E is stopped. Determines whether the set time (20 seconds) has elapsed after the engine has stopped, and only when the set time (20 seconds) has elapsed after the engine has stopped,
Perform the following processing. That is, when the refueling mode is off, it is determined whether or not the fuel is being refueled. When the fuel is not being refueled, the "hour meter" shown in FIG. 4A is displayed. After turning on the mode, Figure 4 (b)
Display during refueling as shown in Fig. In the “refueling display”, the number of fuel remaining display segments displayed in the bar graph on the left end of the screen is increased from the normal four to eight to be enlarged and displayed, and “refueling” is displayed on the screen. Display the message of On the other hand, in the case of the refueling mode, the release condition of the refueling mode is determined, and if the release condition is determined, the refueling mode is turned off. Then, in the refueling mode, it is determined whether or not the fuel tank 16 is in the set state close to the full state. When the state is determined, the fuel tank 16 is delayed for a set time (2 seconds) from the time of the determination. Fig. 4 (c)
In addition to displaying the message of "FULL FULL" shown in FIG. 7, the full alarm operation for intermittently operating the alarm buzzer 8 is executed. At the time when the setting state close to the full amount is determined,
For example, the alarm buzzer 8 may be actuated once to draw the worker's attention.

The engine E is detected by the rotation speed sensor S3.
If it is detected that has changed from the operating state to the stopped state, after the engine is stopped, the set time (about 20 seconds)
Only after the elapse of the time, it is determined whether or not the fuel is being replenished, or the full-capacity alarm operation is performed. After a while after the stoppage, the above-described processes are appropriately performed after the liquid level of the fuel in the tank 16 is stabilized.

As shown in FIG. 6, the remaining fuel detection / display processing is executed by another control routine. In this remaining fuel detection / display processing, the detected value of the fuel sensor S2 is set at a set time interval (engine time). 80 ms when operating, 2 when engine stopped
0 ms), and the set number of sampling data (8 when the engine is running, 4 when the engine is stopped)
The remaining fuel value is obtained by simple averaging of the fuel cells, and the number of display segments corresponding to the fuel remaining value is turned on.

In the refueling determination processing for determining whether or not the fuel is being supplied, as shown in FIG. 7, the state in which the remaining fuel value obtained in the remaining fuel detection processing increases from the previous value is m. After the first counter has counted up consecutively (for example, three times), one of the quantitative states in which the remaining fuel amount does not increase or does not increase or decrease continues for n times (for example, three times). 13 times) When the second counter counts up continuously, it is determined that refueling is in progress. However, if the remaining fuel value decreases at least once from the previous value in the n counting processes, the first and second counter values are reset so that the remaining fuel value increases from the previous value. The process is repeated from the counting process of determining whether or not the state to be performed is repeated m times (for example, three times). In other words, it is possible to avoid erroneous determination of refueling due to fluctuations in the liquid level.

Similarly, in the refueling mode release determination processing for determining the release of the refueling mode, as shown in FIG. 8, the state in which the fuel remaining amount decreases from the previous value m ′ times (for example, 3 times).
After the third counter counts up continuously, any one of the quantitative states in which the remaining fuel amount decreases or does not increase or decrease continues n ′ times (for example, 13 times). When the fourth counter counts up continuously, it is determined that the condition for canceling the refueling mode is satisfied. However, if the remaining fuel value increases at least once from the previous value in the n ′ number of counting processes, the third and fourth counter values are reset so that the remaining fuel value becomes smaller than the previous value. The process is repeated from the counting process for determining whether the decreasing state continues m ′ times (for example, three times). In other words, due to fluctuations in the liquid level,
It is prevented that the refueling mode is canceled by mistake.

In the full capacity determination process for determining whether or not the set state is close to the full capacity, as shown in FIG. 9, whether the detected value of the fuel sensor S2 has reached the maximum detected value, It is determined whether or not each remaining fuel value (average value of four data sampled at intervals of 20 ms) obtained in the detection processing has reached the maximum detection value, and the remaining fuel value has reached the maximum detection value. If it has, the full count value is incremented by one, and if it has not reached, the full count value is cleared, and the full count value exceeds the set value (25) and continues for a predetermined time (2 seconds) And the maximum detection value is reached,
It is determined that the setting state is almost full.

On the other hand, when the engine E is operating with the key switch MW turned on, the refueling mode is turned off, and the full fuel alarm operation is stopped (the message "FULL FULL" on the liquid crystal screen is erased). After that, it is determined whether or not the work condition of the harvesting work is satisfied. Until the work condition is satisfied, as shown in FIG. The engine speed is displayed (in the figure, 1b is a mark indicating the position of the rated speed of the engine E, and the value of the rated speed is stored in the meter controller 7). 4
As shown in (e), the engine load indicating the magnitude of the load is displayed by a number from 1 to 4. Here, the working conditions are as follows when the stock sensor S1 and the threshing switch S4 are on, the neutral switch S6 and the reverse switch S7 are off, and the vehicle speed detection value is 0.05 m / sec or more. It is determined that the working condition is satisfied. Also, the engine load is determined based on the amount of decrease in the rotational speed from the initial rotational speed in the no-load state after being adjusted to the rated rotational speed such that the greater the decrease, the greater the load.

[Alternative Embodiment] The full-amount warning means 101 may be, for example, a flashing alarm lamp or the like in addition to a warning sound of a buzzer or the like. For example, in addition to displaying the message of "fuel full" as full amount information, a segment image of the remaining amount display may blink.

The remaining amount detecting means S2 may be, for example, an ultrasonic type or a photoelectric type sensor other than the float type sensor. The configuration in which the maximum detection value is set to an amount smaller than the full state of the fuel tank 16 is not limited to the mechanical means using the stopper in the case of the float type sensor, and may be appropriately determined according to the type of various sensors. Can be configured.

The alarm control means 100 is operated by the remaining amount detecting means S2.
The set time, which is the delay time from when it reaches the maximum detection value and when it is determined that the fuel in the fuel tank 16 has reached the setting state near full, to when the full amount alarm means 101 is activated, is The set time (2 seconds) can be appropriately changed and set according to conditions such as the degree to which the setting state near the amount is close to the full amount and the operation speed of refueling of the worker.

The remaining amount display means 102 is not limited to one that displays the remaining amount by increasing or decreasing the number of segment images arranged in a horizontal line on the screen of the liquid crystal display unit 1. For example, the remaining amount may be displayed by a continuously expanding and contracting bar graph.

In the above embodiment, only when the engine E is stopped, it is determined whether or not fuel is being supplied to the fuel tank, and a warning of the full amount is issued. The above processing may be performed even when the engine E is in an idling state. Although not shown, a manual full switch for turning on / off the full alarm operation may be provided so that the full alarm operation is executed only when the operator turns on the full switch. Good.

The work vehicle is not limited to a combine for harvesting work, but may be other agricultural work vehicles or various work vehicles for civil engineering and construction.

[Brief description of the drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a plan view showing a display panel.

FIG. 3 is a block diagram showing a control configuration.

FIG. 4 is a diagram of a display screen showing display contents of operation information.

FIG. 5 is a flowchart of a control operation.

FIG. 6 is a flowchart of a control operation.

FIG. 7 is a flowchart of a control operation.

FIG. 8 is a flowchart of a control operation.

FIG. 9 is a flowchart of a control operation.

[Explanation of symbols]

 Reference Signs List 16 fuel tank 100 alarm control means 101 full amount alarm means 102 remaining amount display means S2 remaining amount detection means

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kazuhiro Takahara 64 Ishizukita-cho, Sakai-shi, Osaka Kubota Sakai Works (56) References JP-A-57-86719 (JP, A) 34420 (JP, A) Japanese Utility Model 3-125223 (JP, U) Japanese Utility Model 5-28936 (JP, U) Japanese Utility Model 56-114927 (JP, U) Japanese Utility Model 61-52232 (JP, U) Japanese Utility Model No. 5-40827 (JP, U) Japanese Patent Publication No. 7-49985 (JP, B2) Utility model registration 3000459 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01F 23 / 00-25/00

Claims (4)

(57) [Claims] 1. A full-capacity alarm means for alarming that a fuel in a fuel tank provided in a work vehicle is full, and configured to detect a remaining amount of fuel in the fuel tank, and A remaining amount detecting means whose maximum detection value is set to an amount smaller than the full state of the fuel in the fuel tank, a detection value of the remaining amount detecting means reaching the maximum detection value,
A work vehicle provided with alarm control means for activating the full warning means with a delay of a set time from the time of the determination when it is determined that the fuel in the fuel tank has reached a set state near full. Alarm device. 2. The method according to claim 1, wherein the alarm control means sets the fuel in the fuel tank close to a full level when a time during which the detection value of the remaining amount detection means reaches the maximum detection value continues for a set time or more. 2. The alarm device for a work vehicle according to claim 1, wherein the alarm device is configured to determine that the vehicle is in a state. 3. A remaining amount display means for displaying a remaining amount of fuel in the fuel tank based on information of the remaining amount detecting means, wherein the full amount warning means includes a fuel remaining amount provided by the remaining amount display means. The warning device for a work vehicle according to claim 1 or 2, wherein the display of (1) is configured to display full information indicating the full state. 4. The alarm device for a work vehicle according to claim 1, wherein the full-amount warning unit is configured to warn of the full state by a sound.