KR20070056380A - Method for re-sensing fuelling of vehicles - Google Patents

Abstract

A method for re-sensing a fuelling of vehicles are provided to supply exact information to a driver by measuring accurate flow amount of a fuel tank. A method for re-sensing a fuelling of vehicles includes the steps of: checking and storing an initial fuel amount when a cover of a fuel injection port is open(201,203), and entering an oil supply mode(205); checking and storing a fuel amount after an oil supply when a car speed is sensed(207,209); comparing the fuel amount after an oil supply with the initial fuel amount to judge whether the fuel amount is changed(211); upgrading an allowable running distance when the fuel amount is changed, and continuously checking a speed signal when the fuel amount is not changed and judging whether a vehicle stops, and checking and storing a fuel amount after a stop of the vehicle when the vehicle stops(215); checking and storing a final fuel amount when a car speed is sensed from the speed signal(219); comparing the fuel amount after a stop of the vehicle with the final fuel amount and judging whether the fuel amount is changed(221); and upgrading the allowable running distance when the fuel amount is changed(223).

Description

Refueling of fuel tanks in vehicles {METHOD FOR RE-SENSING FUELLING OF VEHICLES}

1 is a configuration diagram of a fuel tank fueling recognition system of a vehicle to which the present invention is applied;

Figure 2 is a control flow diagram showing a fuel tank refueling recognition method of a vehicle according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: vehicle fuel tank refueling system

110: trip computer 120: fuel door switch

130: fuel tank 140: fuel sensor

150: operation power supply unit 160: speed sensor

170: instrument panel 180: battery

S1: fuel door switch signal S2: fuel remaining signal

S3: operating voltage S4: speed signal

The present invention relates to a method for recognizing a fuel remaining amount in a fuel tank provided in a vehicle, and more particularly, by measuring an amount of fuel in a fuel tank of a vehicle and calculating a driving distance that can be driven by the fuel. In the trip computer that continuously displays on the dashboard of the vehicle so that the vehicle can be checked, the flow rate of the fuel tank is accurately measured even when the vehicle is refueled after driving rather than refueling. The present invention relates to a method for recognizing a fuel tank of a vehicle that can provide accurate information to a vehicle.

Measuring the amount of fuel remaining in the fuel tank is one of the important pieces of information that the driver needs to know about the condition of the vehicle. This is to inform the driver when fueling the vehicle so that the vehicle will run out of fuel and become inoperable. . In order to inform the driver of the need for fueling, conventionally, a fuel gauge was installed in the fuel tank and a warning light was turned on when the output value of the fuel gauge was within the set condition.However, the fact that the warning light is on can only travel further. Not only do they know whether they have a sense of psychological anxiety, but also the inconvenience of having to calculate the remaining distance for the driver.

In addition, the amount of fuel remaining in the fuel tank displayed on the instrument panel of the vehicle using the conventional fuel gauge changes from time to time according to the parking state of the vehicle. In all cases, such as parking on a hill, parking on a downhill, or parking on an incline, the amount of fuel in the fuel tank is constant, but the needle of the instrument cluster moves back and forth depending on the tilt of the vehicle.

Therefore, recently, a system that calculates the driving distance that can be driven by the fuel remaining in the fuel tank and continuously displays it on the instrument panel for the driver to check visually is called a trip computer.

Trip computer is a vehicle information device that informs the driver of various information related to driving such as average speed, mileage, outside temperature, etc. as well as driving distance according to the amount of fuel remaining in the fuel tank and remaining fuel amount. When the trip computer is installed in the vehicle, the driver can know exactly the driving distance that can be driven by the fuel remaining in the current fuel tank.The accumulated distance, average speed, driving time and average outside temperature from the starting point to the present time And the like. In addition, if the speed limit is set using the up / down switch, various auxiliary devices are provided, such as an alarm when the speed exceeds the speed limit.

The trip computer receives the information on the amount of fuel remaining in the fuel tank from the fuel sensor attached to the fuel tank and displays the driving distance based on this. That is, the trip computer distance calculation method detects the voltage signal from the fuel sensor of the fuel tank when refueling, sets the fuel level lubricated in the fuel tank as the initial fuel amount, and then operates the injector to the engine through the injector. The amount of fuel injected is added, and the sum of the sum of the fuels in the initial fuel amount is used to calculate the remaining fuel amount in the current fuel tank.

The operation of the trip computer is performed by the driver pressing the vehicle's fuel door switch to open the lid of the fuel inlet to enter the fueling mode, receiving the fuel amount measured by the fuel sensor, and displaying it on the monitor of the dashboard. Thereafter, when the speed signal is input from the speed sensor as the vehicle runs, the fueling mode is canceled.

By the way, when the vehicle opens the lid of the fuel inlet for fueling and runs without actually fueling, the trip computer releases the fueling mode and there is a problem in that it does not recognize the fueling that occurs later.

For example, in response to the increasing number of vehicles, many gas stations have been created in various places along the road, so that drivers can freely choose a gas station. When you enter a gas station that you haven't seen before feels too expensive, you may be reluctant to refuel at another nearby gas station. Accordingly, as described above, after the lid of the fuel inlet is opened for fueling, the fuel is not pumped and then traveled to the next gas station, and the fuel is not recognized by the trip computer.

Therefore, an object of the present invention for solving the above problems is to accurately measure the flow rate of the fuel tank even if the vehicle is refueled after driving without refueling attempt, and can provide accurate information to the driver based on this. The present invention provides a method for recognizing a fuel tank of a vehicle.

In order to achieve the above object, the present invention records a speed signal without a change amount of fuel when the lid of the fuel inlet is opened, and checks the current fuel amount of the fuel tank when the vehicle stops while driving. After that, when the vehicle starts, the fuel level of the fuel tank is checked after 1 second, and when the 10 liter difference is maintained for 2 seconds or more compared with the fuel amount before starting, the fuel is recognized as being fueled and the driving distance is updated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same components have the same reference numerals as much as possible even if they are displayed on different drawings. Detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a configuration diagram of a fuel tank fueling recognition system of a vehicle to which the present invention is applied, and uses a speed pulse as a signal for recognizing fueling state as shown. As an example, the speed pulse is a vehicle condition in which 60 km / h is maintained at 637 RPM. Since this is (637 * 4 pulse / 60sec = 60km / h), when 2548 pulses are input from the vehicle speed sensor 160, the driving distance becomes 1km. That is, the frequency at the speed of 1km / h is (637 * 4) / 3600 = 0.707Hz, so the waveform is turned on / off at intervals of 1412.873ms, and the time required to travel 1km at the speed of 1km / h is ( 1412.873ms * 2548 * 2) = It takes about 2sec.

Looking at the configuration of the fuel tank refueling recognition system, the fuel door switch 120 is located on the meteorite side so that the driver can open the fuel inlet cap, and when pressed according to the driver's operation, inputs a voltage of 12V from the battery 180; A fuel sensor 140 mounted inside the fuel tank 130 and operating in a variable resistance type, an operating power supply 150 for supplying operating power to the fuel sensor 140, and the above-described speed pulse to detect the vehicle. The speed sensor 160 transmits the speed value to the trip computer 110, an instrument panel 170 displaying the fuel amount of the fuel tank, and a trip computer 110 for controlling the overall components of the system.

The trip computer 110 detects the ON / OFF operation of the fuel door switch 120 with the fuel door switch signal S1 in order to perform the fuel tank refueling recognition method of the vehicle according to the present invention, and from the fuel sensor 140. Receives the fuel residual signal (S2) to determine the fuel amount in the fuel tank 150, detects the operating voltage (S3) of the operating power source 150 to store the reference fuel amount, and the speed signal (160) S4) is applied to determine the movement of the vehicle.

2 is a control flow diagram illustrating a fuel tank refueling recognition method of a vehicle according to an exemplary embodiment of the present invention. Hereinafter, a fuel tank refueling recognition method of a vehicle according to the present invention will be described in detail with reference to FIGS. 1 and 2.

As shown in FIG. 2, when the trip computer 110 receives the switch signal S1 from the fuel door switch 120 in step 201, the trip computer 110 determines that the lid of the fuel inlet is opened for refueling. After proceeding to check and store the initial fuel amount (F0) of the fuel tank 130, and enters the fueling mode of step 205. The trip computer 110 determines that the vehicle is in an oiling state in steps 201 to 205 and enters the oiling mode. Subsequently, when the vehicle speed S is detected from the speed sensor 160 in step 207, it is determined that the vehicle has left the gas station after refueling. In step 209, the fuel amount F1 after fueling is checked and stored.

In this case, the trip computer 110 determines whether there is a variation (| F0-F1 |) between the initial fuel amount F0 and the fuel amount F1 after refueling in step 211, in order to determine whether the vehicle actually refuels the fuel after opening the fuel inlet lid. Judge. If there is a variation in the determination in step 211, the flow proceeds to step 223 to update the driving distance according to the changed fuel amount F1 and ends.

On the other hand, if there is no change in fuel amount in the determination of step 211, the trip computer 110 searches for the vehicle speed S applied from the speed sensor 160 to determine whether the vehicle has stopped. This is to determine the exact amount of fuel by detecting the case where the vehicle is to be refueled at another gas station after starting without refueling after opening the fuel inlet cover in steps 201 to 211. The trip computer 110 proceeds to step 215 and checks and stores the fuel amount F2 immediately after the vehicle stops, and after detecting a departure of the vehicle in step 217, a predetermined time (for example, 1 second) elapses. Proceed to step 219, check the final fuel amount (F3) and save it.

The trip computer 110 refers to the fuel amount data checked again in steps 213 to 219, and if the fuel variation of the fuel tank 130 is 10 liters or more in step 221, the vehicle is maintained for a predetermined time (eg, 2 seconds) or more. In step 223, the fuel is refueled, and the driving distance is updated. Otherwise, the fuel is not fueled in the vehicle.

Accordingly, the fuel tank refueling recognition method of the vehicle according to the present invention accurately measures the flow rate of the fuel tank even when the vehicle is refueled after driving without refueling after attempting to refuel, and can provide accurate information to the driver based on this. Will be.

On the other hand, in the detailed description of the present invention has been described with reference to specific embodiments, various modifications are possible without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention accurately measures the flow rate of the fuel tank even when the vehicle is refueled after driving rather than refueling after refueling attempt in a system that detects a signal of the fuel sensor to accurately measure the flow rate of the fuel tank. It has the effect of providing information.

In addition, the present invention displays the amount of fuel remaining before the start of the vehicle at all times, regardless of the parking state of the vehicle, and checks the amount of change in the fuel thereafter to determine the exact amount of fuel, so that the driver can accurately determine the amount of fuel. As a result, it is possible to easily determine when to refuel.

Claims (7)

Recognizing the fuel tank refueling of the vehicle using a trip computer that measures the amount of fuel in the vehicle's fuel tank, calculates the distance traveled by this fuel, and continuously displays it on the dashboard of the vehicle for the driver to visually check In the method, The trip computer checks and stores the initial fuel amount from the fuel sensor when the lid of the fuel inlet is opened from the switch signal received from the fuel door switch, and enters the fueling mode. The trip computer checks and stores the amount of fuel after refueling when the vehicle speed is detected from the speed signal received from the speed sensor; A third step of judging whether there is a variation in fuel amount by comparing the initial fuel amount with the fuel amount after refueling; As a result of the determination, if there is a change in fuel amount, the travelable distance is updated, and if there is no change in fuel amount, the speed signal is continuously checked to determine whether the vehicle is stopped, and when the vehicle is stopped, the amount of fuel is checked and stored immediately after stopping. Performing a fourth step; A fifth step of checking and storing a final fuel amount when a vehicle speed is detected from the speed signal; A sixth step of comparing the fuel amount with the final fuel amount immediately after the stop to determine whether there is a change in the fuel amount; And the seventh step of updating the driving distance if there is a change in fuel amount and ending without updating the driving distance if there is no change in fuel amount. According to claim 1, If the vehicle speed is detected from the speed signal after the fourth step, Waiting for a predetermined time before checking the final fuel amount; Fuel tank refueling recognizing method of the vehicle further comprising. The method of claim 2, wherein the predetermined waiting time is A fuel tank refueling recognition method for a vehicle, characterized in that 1 second. The method of claim 1, wherein the sixth step is The fuel tank refueling recognizing method of the vehicle, characterized in that the fuel amount fluctuates when the state in which the fluctuation of the fuel amount is greater than or equal to the predetermined amount is maintained for a predetermined time. The method of claim 2, wherein the sixth step is The fuel tank refueling recognizing method of the vehicle, characterized in that the fuel amount fluctuates when the state in which the fluctuation of the fuel amount is greater than or equal to the predetermined amount is maintained for a predetermined time. The method of claim 4, wherein the variation of the fuel amount, The fuel tank refueling recognizing method of the vehicle, characterized in that it is determined that the state in which the variation of the fuel amount is 10 liters or more is maintained for 2 seconds or more. The method of claim 5, wherein the variation of the fuel amount, The fuel tank refueling recognizing method of the vehicle, characterized in that it is determined that the state in which the variation of the fuel amount is 10 liters or more is maintained for 2 seconds or more.

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