Method and system for displaying oil quantity of special-shaped oil tank

Abstract

The invention relates to the technical field of fuel quantity display, and provides a special-shaped fuel tank fuel quantity display method which comprises the following steps: S1, arranging a pressure type fuel sensor at the bottom of a special-shaped fuel tank; s2, detecting a fuel quantity pressure signal by adopting a pressure type fuel sensor, and transmitting the pressure signal to a signal processing chip; s3, the signal processing chip processes the pressure signal to obtain an oil quantity signal, and transmits the oil quantity signal to the instrument module; and S4, the instrument module receives the oil quantity signal and then displays the oil quantity. The invention further provides a special-shaped fuel tank fuel quantity display system which comprises the pressure type fuel sensor, the instrument module and the special-shaped fuel tank fuel quantity display method. The pressure type fuel sensor is applied to the special-shaped fuel tank, the installation space is not affected by the appearance shape, the adaptability is wide, the pressure collection range is wide, the structure is simple, maintenance is convenient, and compared with a product of a traditional structure, the cost advantage is obvious for a large fuel tank.

Description

Technical Field

[0001] The present invention relates to the technical field of oil quantity display, and in particular to an oil quantity display method and system for a special-shaped oil tank. Background Art

[0002] Traditional fuel sensors are generally straight-rod magnetic induction sensors or rocker-arm variable resistance sensors. For some irregularly shaped fuel tanks, such as various streamlined and beautiful fuel tanks on motorcycles, due to the special shape of the fuel tank, the fuel will usually gather in the upper part. A lot of fuel in the upper part will be at a full fuel level, while the fuel level in the lower part will change very quickly. When the traditional fuel sensor reaches the top dead center, there is still a lot of fuel that cannot be measured, so the fuel volume cannot be accurately measured, and the mileage cannot be accurately calculated. The fuel volume display and the mileage display are both inaccurate. Summary of the invention

[0003] The object of the present invention is to provide a method and system for displaying the oil level of a special-shaped oil tank, which can at least solve some of the defects in the prior art.

[0004] To achieve the above object, the embodiment of the present invention provides the following technical solution: a method for displaying the oil level of a special-shaped oil tank, comprising the following steps:

[0005] S1, a pressure fuel sensor is installed at the bottom of the special-shaped fuel tank;

[0006] S2, using the pressure type fuel sensor to detect the fuel pressure signal, and transmitting the pressure signal to the signal processing chip;

[0007] S3, the signal processing chip processes the pressure signal to obtain an oil level signal, and transmits the oil level signal to the instrument module;

[0008] S4, the instrument module displays the oil level after receiving the oil level signal.

[0009] Furthermore, the signal processing chip determines whether the pressure signal is a valid pressure signal, and processes the valid pressure signal into the oil quantity signal.

[0010] Further, the specific method of determining whether the pressure signal is a valid pressure signal is:

[0011] The maximum fuel consumption under different working conditions is known in advance according to the engine displacement of the vehicle model, and the fuel consumption value is converted into an approved pressure signal and stored in the signal processing chip.

[0012] The signal processing chip compares the pressure signal obtained from the pressure fuel sensor with the approved pressure signal.

[0013] If the pressure signal is greater than the approved pressure signal, the pressure signal is not a valid pressure signal; if the pressure signal is less than or equal to the approved pressure signal, the pressure signal is a valid pressure signal.

[0014] Furthermore, the maximum fuel consumption is set to 0.1L / 3S, and the signal processing chip collects a pressure signal every three seconds. The signal processing chip processes the pressure signal into an oil level signal, and the instrument module receives the oil level signal and processes it into fuel consumption. If the fuel consumption is greater than 0.1L / 3S, the pressure signal collected this time is not a valid pressure signal and should be filtered out.

[0015] Furthermore, the pressure fuel sensor collects pressure signals multiple times in one cycle, and transmits each of the collected pressure signals to the signal processing chip. The signal processing chip processes each of the obtained pressure signals into each of the oil quantity signals, and takes the average value of each of the oil quantity signals and transmits them to the instrument module.

[0016] Furthermore, when there are pressure signals that are not valid pressure signals, the signal processing chip first determines whether each pressure signal is a valid pressure signal to filter out pressure signals that are not valid pressure signals, and then processes the remaining pressure signals into the oil level signals.

[0017] Furthermore, three minutes is set as a cycle, and the signal processing chip collects a pressure signal every three seconds. The signal processing chip processes a maximum of sixty collected pressure signals into current oil level signals.

[0018] Furthermore, when the pressure type fuel sensor is continuously powered on, the pressure type fuel sensor only collects the decreasing pressure signal and filters out the increasing pressure signal.

[0019] Furthermore, the oil level signal is a resistance signal, a voltage signal and / or a CAN signal, and the instrument module has a resistance signal input interface, a voltage signal input interface and / or a CAN bus interface.

[0020] An embodiment of the present invention provides another technical solution: a fuel quantity display system for a special-shaped fuel tank, comprising a pressure fuel sensor, an instrument module and the above-mentioned fuel quantity display method for a special-shaped fuel tank, wherein the method uses the pressure fuel sensor and the instrument module to display the fuel quantity in real time.

[0021] Compared with the prior art, the beneficial effects of the present invention are: by applying the pressure type fuel sensor to special-shaped fuel tanks, the installation space is not affected by the external shape, the adaptability is wide, the pressure collection range is wide, the structure is simple, and the maintenance is convenient. For large fuel tanks, the cost advantage is obvious compared with traditional structural products. Since the sensing method of the pressure type fuel sensor is different from that of the traditional fuel sensor, it only needs to be set at the bottom of the fuel tank to detect the oil pressure changes in the fuel tank in real time, so that the signal processing chip can know the remaining fuel according to the fuel pressure and accurately display the fuel amount and cruising range. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A flow chart of a method for displaying the fuel level in a special-shaped fuel tank provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1, an embodiment of the present invention provides a method for displaying the amount of oil in a special-shaped oil tank, comprising the following steps: S1, a pressure fuel sensor is arranged at the bottom of the special-shaped oil tank; S2, the pressure fuel sensor is used to detect the oil pressure signal, and the pressure signal is transmitted to the signal processing chip; S3, the signal processing chip processes the pressure signal to obtain the oil signal, and transmits the oil signal to the instrument module; S4, the instrument module displays the oil signal as the current oil level after receiving the oil signal. In this embodiment, by applying the pressure fuel sensor to the special-shaped oil tank, the installation space is not affected by the shape of the outer shape, the adaptability is wide, the pressure collection range is wide, the structure is simple, and the maintenance is convenient. For large oil tanks, the cost advantage is obvious compared with traditional structural products. Since the sensing method of the pressure fuel sensor is different from that of the traditional fuel sensor, it can detect the oil pressure change in the oil tank in real time by simply setting it at the bottom of the oil tank, so that the signal processing chip can obtain the remaining oil according to the oil pressure and accurately display the oil and cruising range. Specifically, the special-shaped fuel tanks involved in this embodiment include motorcycle fuel tanks, passenger car fuel tanks, commercial vehicle fuel tanks, armored vehicle fuel tanks, yacht fuel tanks, etc. As long as it involves irregular fuel tanks, this method can be used to accurately display the fuel volume. Taking a motorcycle fuel tank as an example, the motorcycle fuel tank is usually integrated with the seat, and its shape is difficult to be made into a standard shape fuel tank that is square or slightly curved like a family car. This makes it difficult for traditional fuel sensors, such as straight rod magnetic induction type or rocker arm variable resistance type sensors, to accurately measure the fuel volume. After experiments, for a motorcycle fuel tank, usually 10L of fuel volume in the upper part is at a full oil level, and the oil level changes very quickly afterwards. After the upper dead point of the traditional straight rod oil level sensor, there is still 5.6L of gasoline that cannot be measured, which will cause serious inaccuracy in the calculation of the cruising range, which often causes trouble to consumers. The present embodiment cleverly uses a pressure fuel sensor and sets it at the bottom of the special-shaped fuel tank. Then, before the fuel runs out, the pressure fuel sensor will be in the fuel to detect the fuel pressure signal in real time, thus ensuring the accuracy of detection, thereby improving the display accuracy of the instrument module. The pressure fuel sensor can self-diagnose faults, refresh data, and support wake-up. It has low power consumption ≤1mA, which is more energy-efficient than traditional sensors. Preferably, the fuel signal is a resistance signal, a voltage signal and / or a CAN signal, and the instrument module has a resistance signal input interface, a voltage signal input interface and / or a CAN bus interface. Please note that the voltage signal here is not the pressure signal mentioned above, and the pressure signal is the signal output by the pressure fuel sensor. The fuel signal can have a variety of forms of expression, such as outputting a resistance signal and then being received by the instrument module, or a voltage signal, a CAN signal, etc., and the instrument module can be provided with an interface accordingly, such as a common CAN bus interface, which will make the product more versatile, and cooperate with the realization of fault self-diagnosis, data refresh, and main line sleep to reduce power consumption.The corresponding functions can also be realized by using other different types of interfaces. In other embodiments, the instrument module can also have means for processing data, such as processing the fuel quantity signal into fuel consumption before displaying it, or participating in the processing of the signal processing chip to process the pressure signal into a fuel signal. Designing multiple processing can avoid missing processing on the one hand, and further improve the display accuracy on the other hand.

[0025] To refine the above technical solution, in some situations and working conditions, such as when the road is bumpy, the fuel will jump in the fuel tank, which will cause the pressure signal detected by the pressure fuel sensor to be inaccurate. We use the effective pressure signal to divide it. If it is an effective pressure signal, it will continue to be processed. If it is not an effective pressure signal, it will be discarded and filtered out, so as to ensure the accurate display of the instrument module. This logic does not exist in traditional fuel sensors, and the two will not be inaccurate due to the jumping of the fuel in the fuel tank. The present application can use a signal processing chip to determine whether the pressure signal is a valid pressure signal, and process the valid pressure signal into the oil quantity signal. Of course, in addition to this, the instrument module can also be used for judgment, but it is preferred that the effective pressure signal is screened at the signal processing chip to avoid display disorder due to missed processing at the instrument module. Preferably, a backup judgment means can also be designed in the instrument module. Through two judgments, it can be ensured that there will be no missed pressure signals, and the display accuracy of the instrument module can be further improved.

[0026] The specific method for judging whether the pressure signal is a valid pressure signal is as follows: the maximum fuel consumption under different working conditions is known in advance according to the engine displacement of the vehicle model, and the fuel consumption value is converted into an approved pressure signal and stored in the signal processing chip; the signal processing chip compares the pressure signal obtained from the pressure fuel sensor with the approved pressure signal; if the pressure signal is greater than the approved pressure signal, the pressure signal is not a valid pressure signal, and if the pressure signal is less than or equal to the approved pressure signal, the pressure signal is a valid pressure signal. Different driving conditions include driving conditions at different speeds, driving conditions on different terrains, driving conditions at different temperatures, etc. The maximum fuel consumption can be obtained by testing multiple conditions and combining the vehicle model engine displacement. If it is necessary to design the logic of the instrument module to judge again, the approved pressure signal in this embodiment can also be stored in the instrument module. It is worth noting that the signal processing chip and the instrument module used in this embodiment both use programmable logic controllers, and storage data, comparison logic, etc. can be designed according to needs.

[0027] The following is a specific embodiment: for example, the maximum fuel consumption can be set to 0.1L / 3S, and the signal processing chip collects a pressure signal every three seconds. The signal processing chip processes the pressure signal into an oil level signal, and the instrument module receives and displays the current oil level. If the fuel consumption is greater than 0.1L / 3S, the pressure signal collected this time is not a valid pressure signal and should be filtered out.

[0028] As an optimization solution of the embodiment of the present invention, the pressure fuel sensor collects multiple pressure signals in one cycle, and transmits each of the collected pressure signals to the signal processing chip, and the signal processing chip averages each of the obtained pressure signals and processes it into the current fuel quantity signal before transmitting it to the instrument module. In this embodiment, in order to ensure the display accuracy of the instrument module, the logic of collecting multiple pressure signals in one cycle can be designed, and the display accuracy of the instrument module can be further improved by taking the average fuel quantity signal.

[0029] For the above scheme, if there is a situation where there is no valid pressure signal, the above judgment logic can also be used to judge the valid pressure signal. That is, before the signal processing chip processes the pressure signal into the oil level signal, the signal processing chip first judges whether each of the pressure signals is a valid pressure signal to filter out the pressure signals that are not valid pressure signals. After filtering, the average value of each of the valid pressure signals is taken and processed into the oil level signal, which is then displayed in real time on the instrument panel by the instrument module.

[0030] The following is a specific embodiment: For example, three minutes can be set as a cycle, and the signal processing chip collects a pressure signal every three seconds. The signal processing chip averages a maximum of sixty pressure signals collected and processes them into a current oil level signal. In this embodiment, the maximum of sixty pressure signals refers to the situation where all are valid pressure signals. If there are no valid pressure signals, the number of signals will be less than sixty.

[0031] As an optimization solution of the embodiment of the present invention, when the pressure type fuel sensor is continuously powered on, the pressure type fuel sensor only collects the pressure signal that decreases and filters out the pressure signal that increases. In this embodiment, when the pressure type fuel sensor is continuously powered on, the engine is in a state of continuous fuel consumption. Even if the road bumps during driving cause the oil level to fluctuate, the pressure type fuel sensor only reads the pressure signal decrease data and filters out the pressure signal increase data.

[0032] As an optimization solution of the embodiment of the present invention, the oil level displayed by the instrument module can only be reduced step by step. In this embodiment, for example, if the oil level is 5 grids full, it can only be reduced to 4 grids first, and then from 4 grids down, and it cannot jump directly from 5 grids to 3 grids. This logic can be limited to cooperate with the above judgment mechanism to improve the display accuracy.

[0033] As an optimization scheme of the embodiment of the present invention, the pressure fuel sensor can be powered by 4.5-12V, respond within 3ms after power-on, and immediately output the pressure signal to the signal processing chip after detecting it. After processing, the fuel level signal is transmitted to the instrument module. When the pressure decreases, the display of the next fuel level is jumped to the next fuel level when the pressure value of the next fuel level is collected. During the continuous power supply of the vehicle, even if the road is bumpy, the fuel level signal is only allowed to decrease, and it is not allowed to increase, that is, return to the previous fuel level. Combined with the above-mentioned judgment logic, the inaccurate pressure detection oil level caused by oil level fluctuations can be filtered out. When refueling, the power is turned off and then turned on again, and the pressure fuel sensor will re-detect the fuel pressure signal.

[0034] The embodiment of the present invention provides a fuel quantity display system for a special-shaped fuel tank, including a pressure fuel sensor, an instrument module and the above-mentioned fuel quantity display method for a special-shaped fuel tank. The method uses the pressure fuel sensor and the instrument module to display the fuel quantity in real time. In this embodiment, the above-mentioned method is used in this system. By applying the pressure fuel sensor to the special-shaped fuel tank, the installation space is not affected by the shape of the outer shape, the adaptability is wide, the pressure collection range is wide, the structure is simple, and the maintenance is convenient. For large fuel tanks, the cost advantage is obvious compared with traditional structural products. Since the sensing method of the pressure fuel sensor is different from that of the traditional fuel sensor, as long as it is set at the bottom of the fuel tank, the oil pressure change in the fuel tank can be detected in real time, so that the signal processing chip can obtain the remaining oil according to the oil pressure and accurately display the oil quantity and cruising range. Specifically, the special-shaped fuel tanks involved in this embodiment include motorcycle fuel tanks, passenger car fuel tanks, commercial vehicle fuel tanks, armored vehicle fuel tanks, yacht fuel tanks, etc. As long as it involves irregular fuel tanks, this method can be used to accurately display the oil quantity. Take the motorcycle fuel tank as an example. Usually, the motorcycle fuel tank is integrated with the seat, and its shape is difficult to be made into a standard shape fuel tank like a family car, which is square or slightly curved. This makes it difficult for traditional fuel sensors, such as straight rod magnetic induction type or rocker arm variable resistance type sensors, to accurately measure the fuel volume. After experiments, for a motorcycle fuel tank, usually 10L of fuel volume in the upper part is at a full grid oil level, and the oil level changes very quickly at the back. After the top dead point of the traditional straight rod oil level sensor, there is still 5.6L of gasoline that cannot be measured, which will cause serious inaccuracy in the calculation of the cruising range, often causing trouble to consumers. However, this embodiment cleverly uses a pressure fuel sensor and sets it at the bottom of the special-shaped fuel tank. Then, before the fuel is used up, the pressure fuel sensor will be in the fuel to detect the fuel pressure signal in real time, thus ensuring the accuracy of detection, thereby improving the display accuracy of the instrument module.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for displaying the oil level of a special-shaped oil tank, characterized in that: The steps include: S1, a pressure fuel sensor is installed at the bottom of the special-shaped fuel tank; S2, using the pressure type fuel sensor to detect the fuel pressure signal, and transmitting the pressure signal to the signal processing chip; S3, the signal processing chip processes the pressure signal to obtain an oil level signal, and transmits the oil level signal to the instrument module; S4, the instrument module displays the oil level after receiving the oil level signal.

2. The method for displaying the oil level of a special-shaped oil tank according to claim 1, characterized in that: The signal processing chip determines whether the pressure signal is a valid pressure signal, and processes the valid pressure signal into the oil quantity signal.

3. The method for displaying the oil level of a special-shaped oil tank according to claim 2, characterized in that: The specific method of judging whether the pressure signal is a valid pressure signal is: The maximum fuel consumption under different working conditions is known in advance according to the engine displacement of the vehicle model, and the fuel consumption value is converted into an approved pressure signal and stored in the signal processing chip. The signal processing chip compares the pressure signal obtained from the pressure fuel sensor with the approved pressure signal. If the pressure signal is greater than the approved pressure signal, the pressure signal is not a valid pressure signal; if the pressure signal is less than or equal to the approved pressure signal, the pressure signal is a valid pressure signal.

4. The method for displaying the oil level of a special-shaped oil tank according to claim 3, characterized in that: The maximum fuel consumption is set to 0.1L / 3S. The signal processing chip collects a pressure signal every three seconds. The signal processing chip processes the pressure signal into a fuel level signal. The instrument module receives the fuel level signal and processes it into fuel consumption. If the fuel consumption is greater than 0.1L / 3S, the pressure signal collected this time is not a valid pressure signal and should be filtered out.

5. The method for displaying the oil level of a special-shaped oil tank according to claim 1 or 2, characterized in that: The pressure fuel sensor collects pressure signals multiple times in one cycle, and transmits each of the collected pressure signals to the signal processing chip. The signal processing chip processes each of the obtained pressure signals into each of the oil quantity signals, and takes the average value of each of the oil quantity signals and transmits them to the instrument module.

6. The method for displaying the oil level of a special-shaped oil tank according to claim 5, characterized in that: When there are pressure signals that are not valid pressure signals, the signal processing chip first determines whether each pressure signal is a valid pressure signal to filter out pressure signals that are not valid pressure signals, and then processes the remaining pressure signals into the oil level signals.

7. The method for displaying the oil level of a special-shaped oil tank according to claim 5, characterized in that: Three minutes is set as one cycle, and the signal processing chip collects a pressure signal every three seconds. The signal processing chip processes a maximum of sixty collected pressure signals into current oil level signals.

8. The method for displaying the oil level of a special-shaped oil tank according to claim 1, characterized in that: When the pressure type fuel sensor is continuously powered on, the pressure type fuel sensor only collects the decreasing pressure signal and filters out the increasing pressure signal.

9. The method for displaying the oil level of a special-shaped oil tank according to claim 1, characterized in that: The oil level signal is a resistance signal, a voltage signal and / or a CAN signal, and the instrument module has a resistance signal input interface, a voltage signal input interface and / or a CAN bus interface.

10. A fuel level display system for a special-shaped fuel tank, characterized in that: It comprises a pressure fuel sensor, an instrument module and a method for displaying the amount of fuel in a special-shaped fuel tank as described in any one of claims 1 to 9, wherein the method uses the pressure fuel sensor and the instrument module to display the amount of fuel in real time.

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