A dynamic adjustment method for vehicle range display and an automotive instrument controller

Abstract

This invention provides a dynamic adjustment method for vehicle range display and an automotive instrument controller, belonging to the field of vehicle range display adjustment technology. When the vehicle is refueled or the battery is recharged after a power outage, an initial range value is calculated based on the current remaining fuel level and the factory default fuel consumption and displayed on the vehicle's instrument panel. The remaining fuel level and real-time average fuel consumption are sampled at fixed intervals, and the range value is calculated in real time. A scaling factor is calculated, which is the ratio of the range value displayed on the instrument panel to the real-time calculated range value. When the scaling factor is less than a scaling factor threshold, the range decreases by the scaling factor value for every kilometer driven; when the scaling factor is greater than the scaling factor threshold, the range decreases by the scaling factor threshold value for every kilometer driven. The real-time range display value is obtained by subtracting the range decrease value from the range value displayed on the instrument panel. This invention solves the problem of sudden changes in the vehicle's range display after refueling or recharging the battery.

Description

Technical Field

[0001] This invention belongs to the field of vehicle range display adjustment technology. Specifically, this invention relates to a dynamic adjustment method for vehicle range display and an automotive instrument controller. Background Technology

[0002] With the rapid development of the automotive industry, improving fuel economy, optimizing resource management, and enhancing user experience have become increasingly important. Automakers have widely adopted range estimation technology, but current technology has limitations, leading to a rapid decline in the displayed range, which negatively impacts the user experience.

[0003] Chinese Patent 101464174A discloses a driving range calculation and control system and a calculation and control method. The calculation and control system includes: an MCU microprocessor, a driving range digital display, a vehicle speed signal sampling circuit, an instantaneous fuel consumption signal sampling circuit, and a fuel signal sampling circuit. The MCU microprocessor calculates the average fuel consumption based on the received instantaneous fuel consumption signal and vehicle speed signal, and then calculates the driving range based on the average fuel consumption and the current remaining fuel, which is displayed on the digital display. The average fuel consumption refers to the fuel consumption per 100 kilometers between two refuelings. The remaining fuel is obtained by subtracting the fuel consumed from the fuel level detected after refueling from the fuel level calculated based on the instantaneous fuel consumption signal.

[0004] Existing technology has not solved the problem of sudden changes in the vehicle's range indicator after refueling or when the battery is disconnected and then recharged. Summary of the Invention

[0005] The present invention aims to provide a dynamic adjustment method for vehicle range display and an automotive instrument controller to solve the problem of sudden changes in vehicle range display after refueling or battery disconnection and re-energization.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] This invention provides a method for dynamically adjusting the display of vehicle driving range, comprising the following steps:

[0008] Step 1: When the vehicle is refueled or the battery is powered back on after being disconnected, the initial range is calculated based on the current remaining fuel and the factory default fuel consumption and displayed on the vehicle's instrument panel;

[0009] Step 2: Sample the remaining fuel quantity and real-time average fuel consumption at fixed intervals, and calculate the driving range in real time;

[0010] Step 3: Calculate the scaling factor, which is the ratio of the range displayed on the car's instrument panel to the real-time calculated range.

[0011] Step 4: When the scaling factor is less than the scaling factor threshold, the range reduction per kilometer driven is the scaling factor value; when the scaling factor is greater than the scaling factor threshold, the range reduction per kilometer driven is the scaling factor threshold value. Subtract the range reduction value from the range value displayed on the car's instrument panel to obtain the real-time range display value, and update it on the car's instrument panel for display.

[0012] In step one, the formula for calculating the initial battery life is:

[0013] ;

[0014] in This represents the current remaining fuel level in the car. This is the factory default fuel consumption.

[0015] In step one, the remaining fuel level of the vehicle is collected in real time using a fuel level sensor.

[0016] In step two, the fuel injection quantity is calculated by measuring the duration of each opening of the car's fuel injectors, and the real-time average fuel consumption is calculated by the ratio of the total fuel injection quantity per unit time to the mileage measured by the vehicle speed sensor.

[0017] In step two, the formula for calculating the real-time battery life is:

[0018] ;

[0019] in Let be the amount of fuel remaining at time t. This represents the real-time average fuel consumption.

[0020] In step three, the formula for calculating the scaling factor is:

[0021] ;

[0022] in To display the remaining range on the car's dashboard, This is the battery life value calculated in real time.

[0023] When the car is idling for more than a preset time, the remaining fuel level is sampled, and the real-time range is calculated according to the steps in step one and displayed on the car's instrument panel.

[0024] It also includes a low fuel protection method: when the remaining fuel level is lower than the preset fuel level threshold, the step of adjusting the driving range display by the proportional factor in step four is stopped, the displayed driving range value is set to the real-time driving range calculation value, and the low fuel warning light is illuminated.

[0025] This invention provides an automotive instrument controller that executes the aforementioned dynamic adjustment method for displaying vehicle range.

[0026] The technical effects of this invention are as follows:

[0027] (1) This invention effectively solves the problem of sudden changes in the display of the driving range of traditional vehicles. By introducing a proportional factor and setting a threshold limit adjustment mechanism, the driving range display value is updated gradually according to the driving range in a kilometer gradient, avoiding the situation of a sudden drop in the driving range at one time, and eliminating the range anxiety and driving confusion caused by the drastic fluctuation of the driving range value.

[0028] (2) The remaining fuel quantity of the present invention is collected by the fuel level sensor and processed by A / D conversion and filtering. The real-time average fuel consumption is calculated by combining the fuel injector opening time, fuel injection rate per unit time and vehicle speed mileage. A fixed period sampling and time window statistical method is adopted, and a minimum statistical mileage fault tolerance mechanism is set up to greatly improve the calculation accuracy and stability of remaining fuel quantity, real-time fuel consumption and theoretical range.

[0029] (3) The present invention adds a dedicated range update logic for parking idling timeout. The fuel consumption of the vehicle when idling for a long time can be accurately counted and the range display value of the instrument can be directly refreshed. This not only reflects the fuel consumption at idle, but also avoids the abnormal range display caused by the high instantaneous fuel consumption at idle, and adapts to the actual driving conditions such as vehicle idling.

[0030] (4) The present invention is equipped with low fuel protection control logic. When the remaining fuel is lower than the preset threshold, it automatically exits the smooth adjustment mode, directly synchronizes the real-time range calculation value and lights up the low fuel warning light, accurately and intuitively feeding the driver the real remaining range and fuel shortage warning information, so that the driver can plan the route in time to find a gas station and improve driving safety.

[0031] (5) The overall adjustment logic of this invention relies on the programmed execution of the vehicle instrument controller. No additional hardware structure is required. The dynamic and smooth adjustment of the range can be achieved simply by optimizing the algorithm strategy. It has strong adaptability, low modification and application costs, and can be widely adapted to the range display and control needs of various fuel vehicles. Attached Figure Description

[0032] This manual includes the following figures, which illustrate the following:

[0033] Figure 1 This is a flowchart of a dynamic adjustment method for displaying vehicle range and an automotive instrument controller according to the present invention. Detailed Implementation

[0034] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0035] This invention provides a method for dynamically adjusting the display of vehicle driving range, comprising the following steps:

[0036] Step 1: When the vehicle is refueled or the battery is powered back on after being disconnected, the initial range is calculated based on the current remaining fuel and the factory default fuel consumption and displayed on the vehicle's instrument panel;

[0037] Step 2: Sample the remaining fuel quantity and real-time average fuel consumption at fixed intervals, and calculate the driving range in real time;

[0038] Step 3: Calculate the scaling factor, which is the ratio of the range displayed on the car's instrument panel to the real-time calculated range.

[0039] Step 4: When the scaling factor is less than the scaling factor threshold, the range reduction per kilometer driven is the scaling factor value; when the scaling factor is greater than the scaling factor threshold, the range reduction per kilometer driven is the scaling factor threshold value. Subtract the range reduction value from the range value displayed on the car's instrument panel to obtain the real-time range display value, and update it on the car's instrument panel for display.

[0040] In step one, the formula for calculating the initial battery life is:

[0041] ;

[0042] in This represents the current remaining fuel level in the car. This is the factory default fuel consumption.

[0043] In step one, the remaining fuel level of the vehicle is collected in real time using a fuel level sensor.

[0044] In step two, the fuel injection quantity is calculated by measuring the duration of each opening of the car's fuel injectors, and the real-time average fuel consumption is calculated by the ratio of the total fuel injection quantity per unit time to the mileage measured by the vehicle speed sensor.

[0045] In step two, the formula for calculating the real-time battery life is:

[0046] ;

[0047] in Let be the amount of fuel remaining at time t. This represents the real-time average fuel consumption.

[0048] In step three, the formula for calculating the scaling factor is:

[0049] ;

[0050] in To display the remaining range on the car's dashboard, This is the battery life value calculated in real time.

[0051] When the car is idling for more than a preset time, the remaining fuel level is sampled, and the real-time range is calculated according to the steps in step one and displayed on the car's instrument panel.

[0052] It also includes a low fuel protection method: when the remaining fuel level is lower than the preset fuel level threshold, the step of adjusting the driving range display by the proportional factor in step four is stopped, the displayed driving range value is set to the real-time driving range calculation value, and the low fuel warning light is illuminated.

[0053] This invention provides an automotive instrument controller that executes the aforementioned dynamic adjustment method for displaying vehicle range.

[0054] The following is a detailed description of a dynamic adjustment method for displaying vehicle range according to the present invention.

[0055] The technical objective of this invention is to solve the problem of abrupt changes in the displayed driving range on the instrument panel. For example, if the fuel tank capacity is 60L and the factory default fuel consumption is 6L / 100km, the initial driving range is 1000km. When the user's actual average fuel consumption is 10L / 100km, the actual driving range should be 600km. When the vehicle travels 1km, 0.1L of fuel is consumed, leaving 59.9L. The real-time average fuel consumption is updated to 10L / 100km, and the calculated driving range is 599km. The car's displayed driving range suddenly drops from 1000km to 599km, a decrease of 401km, indicating a severe fluctuation in the driving range.

[0056] The detailed steps of the dynamic adjustment method for displaying vehicle range provided by this invention are as follows.

[0057] When the controller detects a refueling event or the battery being powered back on after a power outage, it triggers the initialization of the driving range display. The controller collects the current remaining fuel level through a fuel level sensor, which can be a resistive level sensor. After A / D conversion and filtering, the fuel volume in liters is obtained. Simultaneously, the controller reads the preset factory default fuel consumption from memory. This value represents the vehicle's fuel consumption under standard test conditions, for example, 6.0L / 100km. The initial driving range is calculated using the following formula:

[0058] ;

[0059] in This represents the current remaining fuel level in the car. This is the factory default fuel consumption.

[0060] The driving range, expressed in kilometers, is obtained. The controller uses this initial driving range value R0 as the driving range value R displayed on the instrument panel. disp The output is displayed on the instrument panel.

[0061] During vehicle operation, the controller periodically collects signals at fixed intervals T (T=1 second in this embodiment) to calculate the real-time average fuel consumption and real-time driving range. The remaining fuel level is collected in real-time by a fuel level sensor. The real-time average fuel consumption is calculated as follows: by reading the duration of each injector opening and the pre-calibrated injector injection rate per unit time, the amount of fuel injected in a single injection is calculated, and the total amount of fuel injected over a certain time window (10 minutes in this embodiment) is accumulated; simultaneously, the actual mileage traveled within that time window is statistically analyzed using the pulse signal output from the vehicle speed sensor. The ratio of this total fuel injection amount to the corresponding mileage is converted into a fuel consumption value per 100 kilometers, which is the real-time average fuel consumption. When the mileage traveled within the time window is lower than the preset minimum statistical mileage (e.g., 0.1 kilometers), the previous valid value can continue to be used. The formula for calculating the real-time driving range is:

[0062] ;

[0063] in Let be the amount of fuel remaining at time t. This represents the real-time average fuel consumption.

[0064] The controller determines the remaining range R based on the current range displayed on the instrument panel. disp And real-time battery life calculation value R t Calculate the scaling factor K:

[0065] ;

[0066] in To display the remaining range on the car's dashboard, This is the battery life value calculated in real time.

[0067] This scaling factor reflects the degree of deviation between the displayed value and the current actual calculated value.

[0068] Within each adjustment cycle, the controller first calculates the vehicle's travel distance since the previous cycle using the vehicle speed signal integral. Then, based on the relationship between the proportional factor and the threshold, it determines the adjustment coefficient for the decrease in range per kilometer, specifically:

[0069] When the scaling factor K is less than the scaling factor threshold (i.e., K<5), the adjustment coefficient is taken as K; when the scaling factor K is greater than or equal to the scaling factor threshold (i.e., K≥5), the adjustment coefficient is taken as the value of the scaling factor threshold.

[0070] For every kilometer the car travels, the range displayed on the instrument panel decreases by K kilometers when K < 5, and by 5 kilometers when K ≥ 5. This avoids the anxiety caused to the driver by a sudden and significant drop in range, achieving a smooth transition in range readings.

[0071] Furthermore, when the vehicle is idling and its speed remains at zero for more than a preset time (10 minutes in this embodiment), it continues to consume fuel even though it is not moving. To avoid a sudden change in the instrument's remaining range value when resuming driving from idle, the controller recalculates the real-time remaining range value based on the currently sampled remaining fuel quantity and the factory default fuel consumption after the idling timeout. This recalculated value is based on the remaining fuel quantity and the factory default fuel consumption, and the calculated value is used to directly update the remaining range value displayed on the instrument. This accurately reflects idling consumption while avoiding abnormal display values ​​caused by excessively high instantaneous fuel consumption during idling.

[0072] This invention also provides a low fuel level protection method. When the remaining fuel level is detected to be lower than a preset fuel level threshold (8 liters in this embodiment), the controller automatically exits the dynamic adjustment mode based on the proportional factor, directly sets the remaining range displayed on the instrument panel to the current real-time calculated range, and simultaneously illuminates the low fuel level warning light on the instrument panel. This provides the driver with the most direct indication of the remaining mileage, enabling them to find a gas station in a timely manner.

[0073] The beneficial effects of the present invention are described in detail below.

[0074] This invention effectively solves the problem of sudden jumps in the display of driving range in traditional vehicles. By introducing a scaling factor and setting a threshold limiting adjustment mechanism, the driving range display value is updated in a gradual decrease according to the driving mileage, avoiding a sudden drop in driving range and eliminating the range anxiety and driving confusion caused by drastic fluctuations in driving range.

[0075] This invention relies on a fuel level sensor to collect the remaining fuel quantity, which is then converted and filtered by an A / D converter. The real-time average fuel consumption is calculated by combining the injector opening time, fuel injection rate per unit time, and vehicle speed mileage. It adopts a fixed-period sampling and time window statistical method, and sets a minimum statistical mileage fault tolerance mechanism, which greatly improves the calculation accuracy and stability of remaining fuel quantity, real-time fuel consumption, and theoretical range.

[0076] This invention adds a dedicated range update logic for parking idling timeouts. The fuel consumption of a vehicle that has been idling for a long time can be accurately counted and the range display value on the instrument panel can be directly updated. This not only reflects the fuel consumption during idling but also avoids abnormal range display caused by high instantaneous fuel consumption during idling, adapting to actual driving conditions such as vehicle idling.

[0077] This invention is equipped with a low fuel protection control logic. When the remaining fuel level is lower than a preset threshold, it automatically exits the smooth adjustment mode, directly synchronizes the real-time range calculation value, and illuminates the low fuel warning light. This provides the driver with accurate and intuitive feedback on the actual remaining range and low fuel warning information, making it easier for the driver to plan routes and find gas stations in a timely manner, thus improving driving safety.

[0078] The overall adjustment logic of this invention relies on the programmed execution of the vehicle's instrument controller, without the need for additional hardware structure. It can achieve dynamic and smooth adjustment of the driving range simply through algorithm strategy optimization. It has strong adaptability, low modification and application costs, and can be widely adapted to the instrument range display and control needs of various fuel vehicles.

[0079] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A method for dynamically adjusting the display of vehicle driving range, characterized in that, Includes the following steps: Step 1: When the vehicle is refueled or the battery is powered back on after being disconnected, the initial range is calculated based on the current remaining fuel and the factory default fuel consumption and displayed on the vehicle's instrument panel; Step 2: Sample the remaining fuel quantity and real-time average fuel consumption at fixed intervals, and calculate the driving range in real time; Step 3: Calculate the scaling factor, which is the ratio of the range displayed on the car's instrument panel to the real-time calculated range. Step 4: When the scaling factor is less than the scaling factor threshold, the range reduction per kilometer driven is the scaling factor value; when the scaling factor is greater than the scaling factor threshold, the range reduction per kilometer driven is the scaling factor threshold value. Subtract the range reduction value from the range value displayed on the car's instrument panel to obtain the real-time range display value, and update it on the car's instrument panel for display.

2. The dynamic adjustment method for displaying vehicle range as described in claim 1, characterized in that: In step one, the formula for calculating the initial battery life is: ； in This represents the current remaining fuel level in the car. This is the factory default fuel consumption.

3. The dynamic adjustment method for displaying vehicle range as described in claim 1, characterized in that: In step one, the remaining fuel level of the vehicle is collected in real time using a fuel level sensor.

4. The dynamic adjustment method for displaying vehicle driving range as described in claim 1, characterized in that: In step two, the fuel injection quantity is calculated by measuring the duration of each opening of the car's fuel injectors, and the real-time average fuel consumption is calculated by the ratio of the total fuel injection quantity per unit time to the mileage measured by the vehicle speed sensor.

5. The dynamic adjustment method for displaying vehicle range as described in claim 1, characterized in that: In step two, the formula for calculating the real-time battery life is: ； in Let be the amount of fuel remaining at time t. This represents the real-time average fuel consumption.

6. The dynamic adjustment method for displaying vehicle range as described in claim 1, characterized in that: In step three, the formula for calculating the scaling factor is: ； in To display the remaining range on the car's dashboard, This is the battery life value calculated in real time.

7. The dynamic adjustment method for displaying vehicle range as described in claim 1, characterized in that: When the car is idling for more than a preset time, the remaining fuel level is sampled, and the real-time range is calculated according to the steps in step one and displayed on the car's instrument panel.

8. The dynamic adjustment method for displaying vehicle range as described in claim 1, characterized in that: It also includes a low fuel protection method: when the remaining fuel level is lower than the preset fuel level threshold, the step of adjusting the driving range display by the proportional factor in step four is stopped, the displayed driving range value is set to the real-time driving range calculation value, and the low fuel warning light is illuminated.

9. A car instrument controller, characterized in that: The controller executes a dynamic adjustment method for displaying vehicle range as described in any one of claims 1-8.

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