CN106482796B - Processing method for displaying oil quantity of automobile under high oil consumption and automobile instrument - Google Patents
Processing method for displaying oil quantity of automobile under high oil consumption and automobile instrument Download PDFInfo
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- CN106482796B CN106482796B CN201611076613.9A CN201611076613A CN106482796B CN 106482796 B CN106482796 B CN 106482796B CN 201611076613 A CN201611076613 A CN 201611076613A CN 106482796 B CN106482796 B CN 106482796B
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- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F9/00—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine
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Abstract
A processing method for displaying the oil quantity of an automobile under high oil consumption and an automobile instrument. The processing method comprises the following steps: collecting the fuel injection data of the engine to calculate the fuel consumption rate; judging whether the automobile is in a high oil consumption mode or not according to the obtained oil consumption rate; and when the automobile is in a high fuel consumption mode, subtracting the obtained fuel injection quantity from the recently displayed fuel quantity, and performing linear filtering processing on the calculation result to obtain a fuel quantity value for providing a user display. The processing method is more accurate in judgment of a high oil consumption scene, and can well filter the input interference from the oil quantity sensor caused by the shaking of the oil tank floater by utilizing the low-pass filtering characteristic of linear filtering.
Description
Technical Field
The invention relates to an interactive technology of an automobile instrument, in particular to a processing method for displaying the oil quantity of an automobile under high oil consumption, the automobile instrument and the processing method for displaying the oil quantity of the automobile.
Background
The oil display is always an important prompt message for human-vehicle interaction. For fuel quantities used in liquid form, the constant shaking of the float of the tank during driving is a major problem to be considered for the correct display of the fuel quantity. In the prior art, a linear filtering algorithm is generally used for filtering interference caused by shaking of an oil tank floater in a driving process, and a proper time lag value is obtained by calibrating an actual vehicle and is used as a control parameter of the linear filtering algorithm.
With the further improvement of the performance of the automobile, the number of road condition types which can be competed by the automobile is increased, and higher requirements are provided for the adaptability of the oil quantity algorithm. For example, how to make the oil quantity display more accurate under high oil consumption. In this regard, the fixed time lag value does not fully satisfy the current demand. Methods for adjusting the time lag value according to the vehicle speed have been developed in the prior art. However, in practice it has been found that this method is still not accurate enough and also affects the stability of the oil quantity display.
Disclosure of Invention
The invention aims to provide a processing method for displaying the fuel quantity of an automobile under high fuel consumption so as to further improve the accuracy and stability of fuel quantity display.
In order to solve the above problems, the present invention provides a method for processing the display of the fuel amount of an automobile with high fuel consumption, which comprises:
collecting the fuel injection data of the engine to calculate the fuel consumption rate;
judging whether the automobile is in a high oil consumption mode or not according to the obtained oil consumption rate;
and when the automobile is in a high fuel consumption mode, subtracting the obtained fuel injection quantity from the recently displayed fuel quantity, and performing linear filtering processing on the calculation result to obtain a fuel quantity value for providing a user display.
The invention also provides an automobile instrument which is accessed into the vehicle bus network and comprises a display terminal and a controller; under the condition of high oil consumption, the controller processes the obtained oil quantity information and displays the processed oil quantity information on a display terminal, wherein the display terminal comprises a mechanical gauge head or a display screen, and the processing comprises the processing method.
The invention also provides a processing method for displaying the oil quantity of the automobile, which comprises the processing of high oil consumption and the processing of non-high oil consumption, wherein the processing of high oil consumption comprises the processing method.
Compared with the prior art, the scheme has the following advantages: the high fuel consumption scene is judged before the fuel quantity information is processed, and the high fuel consumption is judged not according to the vehicle speed but according to the fuel quantity consumption rate, so that the judgment of the high fuel consumption scene is more accurate. And after determining the high fuel consumption scenario, using appropriate processing including linear filtering to obtain the final fuel amount value for display. Therefore, the input interference from the oil quantity sensor caused by the shaking of the oil tank floater can be well filtered by utilizing the low-pass filtering characteristic of linear filtering.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a method for processing an automobile fuel quantity display under high fuel consumption according to the present invention;
FIG. 2 is a schematic flow chart of an embodiment of a method for processing a fuel display of a vehicle with high fuel consumption according to the present invention;
FIG. 3a is a schematic view of the sensor fuel volume and the displayed fuel volume data when the present invention is not implemented in the fuel high mode;
FIG. 3b is a graph showing the fuel level of the sensor and the fuel level data displayed after the fuel consumption is increased.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention to those skilled in the art. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. Furthermore, it should be understood that the invention is not limited to the specific embodiments described. Rather, it is contemplated that the invention may be practiced with any combination of the following features and elements, whether or not they relate to different embodiments. Thus, the following aspects, features, embodiments and advantages are merely illustrative and should not be considered elements or limitations of the claims except where explicitly recited in a claim.
The inventors believe that since the fixed time lag value is typically calibrated under normal driving conditions to accommodate prevailing driving demands. The oil quantity change rate of the automobile in the high oil consumption state is greatly different from that of the automobile in the normal driving state. Therefore, the accuracy of the oil quantity display cannot be guaranteed by using a fixed time lag value as a control parameter of the linear filtering algorithm.
The method of adjusting the time lag value according to the vehicle speed in the prior art is originally intended to adapt to the oil quantity change rate of high oil consumption, but is based on the assumption that the vehicle speed is proportional to the oil quantity consumption rate, and the assumption is not fully verified. Moreover, since the calibration cannot be performed in advance, the time lag value matching the oil consumption rate can be estimated only by real vehicle data and experience, which usually cannot ensure the accuracy of the time lag value. For example, practice proves that an excessively small time lag value can even bring input interference caused by shaking of a fuel tank floater into the display of the fuel amount, the stability of the display is affected, and the user experience is poor.
Accordingly, the inventors of the present invention considered that:
1) in the prior art, whether the time lag value is fixed or adjusted according to the vehicle speed, a universal processing method is expected to be used for various situations, but obviously, the method cannot well deal with the situation of high fuel consumption. In order to display the oil quantity under the condition of high oil consumption as accurately as possible, an oil quantity processing method aiming at the high oil consumption condition independently needs to be designed.
2) It is also important to determine when the vehicle is in high fuel consumption. A processing method capable of accurately judging a high-oil-consumption scene needs to be designed, and the high-oil-consumption scene cannot be judged only according to the vehicle speed.
Referring to fig. 1, according to an embodiment of the present invention, a processing method for displaying an oil amount based on the above two considerations is provided, which includes:
collecting the fuel injection data of the engine to calculate the fuel consumption rate;
judging whether the automobile is in a high oil consumption mode or not according to the obtained oil consumption rate;
when the automobile is in the high fuel consumption mode, the fuel injection quantity obtained by the last time is subtracted from the fuel quantity displayed recently (namely the output value of the last linear filtering processing), and the calculation result is subjected to linear filtering processing to obtain the fuel quantity value for providing the display of a user.
According to practical analysis, the oil consumption rate is a data type capable of reflecting the oil consumption more accurately relative to the use vehicle speed. Therefore, the above embodiment takes the oil consumption rate as a criterion. And the rate of fuel consumption may be obtained from engine fueling data as described in the previous embodiment. By the method, the scene of high oil consumption can be accurately judged.
In a high oil consumption scene, the input data of the oil quantity sensor cannot be updated in time due to the fact that the oil quantity changes rapidly. Therefore, the recently displayed fuel amount (i.e., the output value of the last linear filtering process) minus the current fuel injection amount of the engine needs to be used to compensate for the shortage of slow update of the fuel amount. Then, linear filtering processing is performed again on the calculation result of the subtraction. The time lag value calibrated in the prior art and suitable for the vehicle can be used for carrying out linear filtering processing to filter the interference caused by the shaking of the oil tank floater, so that the performance of the linear filter is ensured.
The following describes the specific processing procedure of the present invention in detail by taking the high-loop mode (typical high fuel consumption scenario) as an example. Of course, the invention is also applicable to the conditions of high oil consumption and non-high ring.
Referring to fig. 2, first, the process of displaying the amount of oil is started based on the state of the vehicle running. If the vehicle is not running, the processing of the fuel amount display is not required. And then, judging whether the fuel injection amount information of the engine is detected or not. If the fuel injection amount information of the engine cannot be detected, the situation of high fuel consumption cannot be judged according to the fuel consumption rate, and a method for adjusting the time lag value according to the vehicle speed in the prior art can be considered. That is, the linear filter processing is performed on the oil amount obtained by the oil amount sensor using the time lag value obtained from the vehicle speed as the control parameter of the linear filter processing, and the result thus obtained is used as the oil amount for display. Alternatively, the calibrated time lag value may be used as a control parameter of the linear filtering process to perform the linear filtering process on the oil amount obtained by the oil amount sensor, and the result obtained thereby may be used as the oil amount for display. Therefore, the condition of CAN bus signal loss CAN be adapted to, and the situation that the processing of the whole oil quantity display cannot respond is avoided.
And when the oil injection amount information can be detected, circularly accumulating the oil injection amount in the current period to obtain the oil consumption rate in the current period. The calculation period of the fuel consumption rate may be based on real vehicle data assessment or according to design requirements, such as 15 seconds, but the invention is not limited thereto. The fuel consumption rate obtained in the calculation period is used to represent the relationship between the total fuel consumption and the time in the period, and the unit thereof may be usually "L/hour".
And after the oil consumption rate in the current period is obtained, calculating the maximum oil updating rate corresponding to the currently calibrated time lag value of the vehicle. The maximum fuel volume update rate refers to a maximum fuel volume change value allowable per unit time.
Then, the oil consumption rate obtained by the above calculation is compared with the maximum oil update rate (where a certain data may need to be converted to ensure that the periods of the two are consistent), and if the oil consumption rate is greater than the maximum oil update rate, it means that the calibrated time lag value cannot perform effective linear filtering processing on the current working condition, so that the current working condition is considered to be in a high oil consumption state. Otherwise, the current working condition is not the high oil consumption state.
The number of times the high fuel consumption state occurs is then counted (debounce process) and the counter is incremented each time a high fuel consumption state is obtained. When the count value of the high fuel consumption state is greater than the preset value (for example, 10 times), the vehicle is considered to be currently in the high-ring mode. The preset value mainly depends on the evaluation value after the real vehicle test, and if the value is too large, the high-loop mode is delayed to enter. That is, the fuel amount display processing method for fuel efficiency described above is not applied for a while. Thus, it may cause inaccuracy in the display of the amount of oil over a period of time. If the value is too small, frequent switching of the fuel quantity display processing method (aiming at switching between high fuel consumption and non-high fuel consumption) is caused, and the stability of the algorithm is affected. Therefore, a comprehensive evaluation is required in terms of both accuracy and stability.
For the working condition that the vehicle enters the high-ring mode (high fuel consumption mode), the method is applied, the fuel injection quantity is decreased by the last displayed fuel quantity, the decreased value and the sensor fuel quantity are used as the input of the linear filter, and the calibrated time lag value of the vehicle is used for performing linear filtering processing (filtering the input interference caused by the shaking of the float of the fuel tank) to obtain the fuel quantity value finally used for displaying. Wherein, the so-called fuel injection quantity is decreased and the quantity of fuel recently displayed is that: the fuel injection amount of the engine obtained each time is subtracted from the last displayed fuel amount within a certain time, and the last displayed fuel amount is the fuel amount value (fuel amount output in fig. 1) used for displaying after the last linear filtering processing for the current time.
And when the comparison result based on the oil consumption rate and the maximum oil updating rate is obtained, the current working condition is not a high oil consumption state. If the high oil consumption state counter is zero, exiting the high oil consumption mode, and applying the oil quantity display processing method in the prior art (using a calibrated time lag value to perform linear filtering, and using the recently displayed oil quantity and the sensor oil quantity as the input of a linear filter); and if the high fuel consumption state counter is greater than zero, reducing the high fuel consumption state counter by one. A high fuel consumption state counter greater than zero indicates that an excessive fuel consumption state has been detected more than once before. And after the counter of the high oil consumption state is reduced by one, keeping the current oil consumption mode unchanged (a common mode or a high oil consumption mode), and determining to exit the high oil consumption mode until the counter returns to zero. For the normal mode, also, the prior art can be applied, by performing linear filtering using a calibrated time lag value, and taking the recently displayed oil quantity and the sensor oil quantity as the input of the linear filter.
In the above process, the high fuel consumption state counter is used to count the possibility that the driving condition is in the high fuel consumption mode. When the count value of the high oil consumption state is larger than the preset value, the high oil consumption state indicates that the current working condition is possibly in the high oil consumption mode, and therefore oil quantity processing based on the high oil consumption mode is performed. When the high fuel consumption state counter is decreased by one, the possibility that the current working condition is in the high fuel consumption mode is reduced (because the judgment of the current high fuel consumption state is no).
Fig. 3a and 3b illustrate a comparison of the sensor fuel quantity and the displayed fuel quantity before and after the implementation of the present invention in fuel high mode. As can be seen from fig. 3a, when the present invention is not implemented, the fuel-high mode is entered as the fuel consumption rate increases (as seen by the fuel injection curve 30), and the displayed fuel quantity is higher than the same value as the sensor input fuel quantity by the sensor input fuel quantity curve 10 and the displayed fuel quantity curve 20. Considering that in a fuel high mode, such as a high ring, the tank float may be at a high level due to a strong fluctuation of the level of the fuel, the value indicating the amount of fuel will be higher than the actual amount of fuel. This may cause the problem of fuel quantity display when the fuel tank is empty, and the driving experience of the user is seriously affected. In contrast, as can be seen from fig. 3b, after the present invention is implemented, as the oil consumption rate increases (as known from the fuel injection amount curve 30), the fuel consumption mode enters the high fuel consumption mode, and as can be known from the sensor input oil amount curve 10 and the displayed oil amount curve 20, the displayed oil amount value is lower than the same-period value of the sensor input oil amount, which can correct the problem in fig. 3a, so that the displayed oil amount is as close to the real value as possible, and the accuracy of oil amount display is improved.
According to the above description, for the high-loop mode, the invention provides a targeted oil quantity display processing method to ensure accuracy and stability. Moreover, if the processing of non-high fuel consumption is added, the complete process can be applied to any driving scene, is not influenced by the vehicle speed, and does not interfere the further processing of the fuel quantity display of the later stage (namely the linear filtering processing after the degressive calculation).
The above-described processing may be implemented by a controller of the automobile meter. Therefore, the invention also provides an automobile instrument which is accessed into a vehicle bus network (CAN, LIN and the like), wherein the automobile instrument comprises a display terminal and a controller; under the condition of high oil consumption, the controller processes the obtained oil quantity information and displays the information on a display terminal, and the display terminal comprises a mechanical gauge head or a display screen. The display screen may comprise any one of: dot matrix screen, segment code screen, TFT screen. Thus, the invention is applicable to conventional automobile instruments (mechanical gauge heads for controlling the rotation of the pointer through the stepping motor), automobile instruments which are common at present (double mechanical gauge heads + central display screens) and automobile instruments with mainstream trend (full-size TFT screens).
Although the present invention has been described with reference to the preferred embodiments, it is not limited thereto. Various changes and modifications within the spirit and scope of the present invention will become apparent to those skilled in the art from this disclosure, and it is intended that the scope of the present invention be defined by the appended claims.
Claims (10)
1. A processing method for displaying the fuel quantity of an automobile under high fuel consumption is characterized by comprising the following steps:
collecting the fuel injection data of the engine to calculate the fuel consumption rate;
judging whether the automobile is in a high oil consumption mode or not according to the obtained oil consumption rate and the maximum oil updating rate corresponding to the calibrated time lag value, wherein the calibrated time lag value is a control parameter of linear filtering, and the linear filtering is used for filtering interference caused by shaking of an oil tank floater in the driving process;
and when the automobile is in a high fuel consumption mode, subtracting the obtained fuel injection quantity from the recently displayed fuel quantity, and performing linear filtering processing on the calculation result to obtain a fuel quantity value for providing a user display.
2. The processing method according to claim 1, wherein determining whether the vehicle is in the high fuel consumption mode according to the obtained fuel consumption rate and the maximum fuel update rate corresponding to the calibrated time lag value comprises: and when the oil consumption rate is greater than the maximum oil updating rate, determining that the automobile is in a high oil consumption mode.
3. The processing method according to claim 1, wherein determining whether the vehicle is in the high fuel consumption mode according to the obtained fuel consumption rate and the maximum fuel update rate corresponding to the calibrated time lag value comprises: when the oil consumption rate is greater than the maximum oil updating rate, determining that the automobile is in a high oil consumption state; and carrying out debouncing processing on the high fuel consumption state of the automobile so as to determine whether the automobile is in a high fuel consumption mode.
4. The processing method of claim 3, wherein the de-dithering process comprises: and counting the times of the automobile in the high oil consumption state, and determining that the automobile is in the high oil consumption mode when the preset times are exceeded.
5. The process of claim 1 wherein the fuel injection data is obtained from a vehicle bus.
6. The process of claim 5, wherein the vehicle bus is a CAN bus.
7. An automobile instrument is accessed to a vehicle bus network and comprises a display terminal and a controller; under the condition of high oil consumption, the controller processes the obtained oil quantity information and displays the information on a display terminal, wherein the display terminal comprises a mechanical gauge outfit or a display screen, and the processing comprises the processing method of any one of claims 1 to 6.
8. The automobile instrument of claim 7, wherein the display screen is a dot matrix screen, a segment code screen, or a TFT screen.
9. A processing method for displaying the fuel quantity of an automobile is characterized by comprising the processing of high fuel consumption and the processing of non-high fuel consumption, wherein the processing of high fuel consumption comprises the processing method of any one of claims 1 to 6.
10. The process of claim 9, wherein the processing of non-fuel-high consumption comprises: carrying out linear filtering processing on the sensor oil quantity; and adjusting the time lag value according to the vehicle speed, and using the obtained time lag value as a control parameter of the linear filtering processing, or using the calibrated time lag value as a control parameter of the linear filtering processing.
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| JP2008303863A (en) * | 2007-06-11 | 2008-12-18 | Fuji Heavy Ind Ltd | Fuel consumption rate calculation system of vehicle |
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| CN101650207B (en) * | 2008-08-14 | 2011-09-28 | 上海德科电子仪表有限公司 | Trend evaluation-based calculation method for fuel gauge |
| CN105865566B (en) * | 2015-01-22 | 2020-11-20 | 力帆实业(集团)股份有限公司 | Method and device for displaying automobile fuel |
| CN105021250B (en) * | 2015-06-19 | 2019-03-01 | 江苏新通达电子科技股份有限公司 | A kind of fuel oil instrument display system and its working method |
| CN105067053A (en) * | 2015-07-24 | 2015-11-18 | 四川理工学院 | Measuring method and system of amount of rest fuel oil of automobile |
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| JP2008303863A (en) * | 2007-06-11 | 2008-12-18 | Fuji Heavy Ind Ltd | Fuel consumption rate calculation system of vehicle |
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