A vehicle resistance display system

Abstract

The application discloses a vehicle resistance display system, which comprises a display module and a control module connected to a CAN bus, wherein the control module is connected to the display module, the control module obtains a slope signal, a wheel end braking force, a wheel end driving force, a vehicle speed signal and a brake pedal signal of a current vehicle from the CAN bus, calculates a starting remaining resistance and a coasting resistance, and controls the display module to display the starting remaining resistance and the coasting resistance through graphics and / or numerical values. The application can assist a driver to control a vehicle to start steadily and safely on a slope.

Description

Technical Field

[0001] This invention belongs to the field of automotive components, and specifically relates to a vehicle resistance display system. Background Technology

[0002] When starting a vehicle on a slope, if the accelerator is pressed too slowly, the vehicle may roll backward; if the accelerator is pressed too quickly, the vehicle may suddenly lurch forward, causing discomfort or even danger.

[0003] Currently, most vehicles are equipped with hill start assist, which automatically maintains brake pressure for a certain period after the driver releases the brake when starting on an incline, thus maintaining braking force and giving the driver ample time to apply the accelerator. This function solves the problem of rolling back on inclines to some extent. However, for some drivers, hill start assist alone is not enough. Drivers cannot accurately judge the system's pressure-holding time; sometimes the pressure-holding time ends before the driver has fully depressed the accelerator, leading to rolling back, which is dangerous. Furthermore, drivers often struggle to control the accelerator opening when starting on an incline. To avoid rolling back, they may increase the accelerator opening, causing a sudden increase in driving force and ultimately resulting in the vehicle lurching forward, severely impacting driving comfort. Summary of the Invention

[0004] The purpose of this invention is to provide a vehicle resistance display system to display the remaining starting resistance and the rolling resistance, so as to assist the driver in controlling the vehicle to start smoothly and safely on the slope.

[0005] The vehicle resistance display system of the present invention includes a display module and a control module connected to a CAN bus. The control module is connected to the display module. The control module obtains the current vehicle's slope signal, wheel-end braking force, wheel-end driving force, vehicle speed signal and brake pedal signal from the CAN bus, calculates the remaining starting resistance and the rollback resistance, and controls the display module to display the remaining starting resistance and the rollback resistance graphically and / or numerically.

[0006] Preferably, the display module is an instrument panel display or a central control display. The instrument panel display shows the remaining starting resistance and roll resistance, which is easily visible to the driver when facing it, making it intuitive and convenient. Since the central control display is larger, it provides a clearer view of the remaining starting resistance and roll resistance for the driver.

[0007] Preferably, the control module controls the display module to display the remaining starting resistance and the slope resistance graphically as follows:

[0008] If the remaining starting resistance is greater than or equal to the preset first resistance threshold, the control display module displays frame I, and the entire frame I is filled with color.

[0009] If the remaining starting resistance is greater than 0 and less than the preset first resistance threshold, the control display module displays frame I, and the left or right part of frame I (i.e., left-hand or right-hand) is filled with color, and the ratio of the length of the filled part of frame I to the total length of frame I is equal to the ratio of the remaining starting resistance to the preset first resistance threshold.

[0010] If the remaining starting resistance is less than or equal to 0, the control display module displays frame I, and frame I is not filled with color.

[0011] If the slope resistance is greater than or equal to the preset second resistance threshold, the control display module displays frame II, and the entire frame II is filled with color.

[0012] If the slope resistance is greater than 0 and less than the preset second resistance threshold, the control display module displays frame II, and the left or right part of frame II is filled with color. The ratio of the length of the filled part of frame II to the total length of frame II is equal to the ratio of the slope resistance to the preset second resistance threshold.

[0013] If the slope resistance is less than or equal to 0, the control display module displays frame II, and frame II is not filled with color.

[0014] Using a combination of frames and colors to display the remaining starting resistance and rollback resistance makes it easier to attract the driver's attention and serves as a reminder.

[0015] Preferably, the control module controls the display module to display the remaining starting resistance and the slope resistance graphically and numerically as follows:

[0016] If the remaining starting resistance is greater than or equal to the preset first resistance threshold, the control display module displays the value of the preset first resistance threshold and frame I, and the entire frame I is filled with color.

[0017] If the remaining starting resistance is greater than 0 and less than the preset first resistance threshold, the display module can either display the value of the remaining starting resistance and frame I, with the left or right part of frame I filled with color and the length of the colored part of frame I being equal to the total length of frame I, or it can display the value of the remaining starting resistance and frame I, with all parts of frame I filled with color and evenly distributed white dots, the number of white dots being proportional to k1; where k1 represents the ratio of the remaining starting resistance to the preset first resistance threshold.

[0018] If the remaining starting resistance is less than or equal to 0, the control display module displays the value 0 and frame I, and frame I is not filled with color.

[0019] If the slope resistance is greater than or equal to the preset second resistance threshold, the control display module displays the value of the preset second resistance threshold and the frame II, and the entire frame II is filled with color.

[0020] If the slope resistance is greater than 0 and less than the preset second resistance threshold, the display module can either display the slope resistance value and frame II, with the left or right part of frame II filled with color and the length of the colored part of frame II being equal to the total length of frame II, or it can display the slope resistance value and frame II, with the entire frame II filled with color and evenly distributed white dots, the number of white dots being proportional to k2; where k2 represents the ratio of the slope resistance to the preset second resistance threshold.

[0021] If the slope resistance is less than or equal to 0, the control display module displays the value 0 and frame II, and the frame II is not filled with color.

[0022] By displaying specific values ​​and using a combination of frames, colors, and white dots to show the remaining starting resistance and rollback resistance, it is easier to attract the driver's attention and make it easier for the driver to intuitively understand the magnitude of the current remaining starting resistance and rollback resistance, thus providing a better prompting effect.

[0023] Preferably, frame I is a rectangular frame I or a triangular frame I, and frame II is a rectangular frame II or a triangular frame II.

[0024] Preferably, the control module calculates the remaining starting resistance and the slope resistance in the following way:

[0025] Calculate the slope resistance based on the vehicle weight, wheel radius, and current vehicle slope signal.

[0026] The remaining starting resistance can be calculated using the formula: Starting resistance = Gradient resistance + Wheel-end braking force - Wheel-end driving force.

[0027] The slope resistance can be calculated using the formula: Slope resistance = Wheel end braking force + Wheel end driving force - Slope resistance.

[0028] Preferably, the control module controls the display module to display the remaining starting resistance and rolling resistance graphically and / or numerically only when the vehicle speed is less than or equal to a preset first speed threshold and the brake pedal is not depressed (i.e., after the brake is released). When the vehicle speed exceeds a preset second speed threshold, the control module controls the display module to exit the display of the remaining starting resistance and rolling resistance. At higher vehicle speeds, both the remaining starting resistance and rolling resistance are zero, indicating that the vehicle has already started and there is no issue with starting on a slope; therefore, it is not necessary to occupy the instrument panel display or the central control display for display. Thus, the above-mentioned entry and exit conditions are set for the vehicle resistance display system.

[0029] Preferably, the preset first vehicle speed threshold is 0, and the preset second vehicle speed threshold is 5 km / h.

[0030] This invention displays the remaining starting resistance and rollback resistance via a display module, assisting drivers in controlling the vehicle for a smooth and safe start on inclines. Rollback resistance refers to the upward force acting on the vehicle on an incline to prevent it from sliding downhill. A positive value of this resistance prevents rollback; when the rollback resistance decreases from positive to negative, rollback will occur. Therefore, when starting on an incline, the accelerator pedal should be pressed no later than when the rollback resistance is close to zero to prevent rollback. By observing the rollback resistance graph (frame II) and its value, drivers can accurately understand the current rollback resistance and thus press the accelerator pedal in a timely manner, avoiding the dangerous situation of rolling back due to delayed acceleration and improving driving safety. The greater the remaining resistance at start-up, the more you need to press the accelerator pedal; the smaller the remaining resistance, the shallower you need to press the accelerator pedal. By observing the graph and values ​​of the remaining resistance at start-up, the driver can accurately understand the current remaining resistance of the vehicle at start-up, and thus be able to control the depth of the accelerator pedal with ease. This avoids the situation where the vehicle suddenly lurches forward when starting on a slope due to excessive pressing of the accelerator pedal, thereby improving driving comfort. Attached Figure Description

[0031] Figure 1 This is a circuit block diagram of the vehicle resistance display system in Example 1.

[0032] Figure 2 This is a flowchart of the control module controlling the display module to display the remaining starting resistance in Example 1.

[0033] Figure 3 This is a flowchart of the control module controlling the display module to display the slope resistance in Example 1.

[0034] Figure 4 These are three display diagrams showing the effects of remaining starting resistance and slope resistance in Example 1.

[0035] Figure 5 These are three display diagrams showing the effects of remaining starting resistance and slope resistance in Example 2.

[0036] Figure 6 This is a visual representation of the remaining starting resistance and slope resistance in Example 3.

[0037] Figure 7 These are three display diagrams showing the effects of remaining starting resistance and slope resistance in Example 4. Detailed Implementation

[0038] Example 1: As Figures 1 to 4As shown, the vehicle resistance display system in this embodiment includes a display module 1 and a control module 2 connected to the CAN bus. The control module 2 is connected to the display module 1, which is an instrument display screen, and the control module 2 is an instrument controller. The control module 2 acquires the current vehicle's slope signal, wheel-end braking force, wheel-end driving force, vehicle speed signal, and brake pedal signal from the CAN bus, calculates the current vehicle's remaining starting resistance and rolling resistance, and controls the display module 1 to display the remaining starting resistance and rolling resistance graphically and / or numerically. The slope signal is detected by sensors configured on the vehicle and transmitted to the CAN bus; the wheel-end braking force is issued by the brake control unit (e.g., ESC) and transmitted to the CAN bus; and the wheel-end driving force is issued by the vehicle power control unit (e.g., VCU) and transmitted to the CAN bus.

[0039] The control module 2 calculates the remaining starting resistance and the slope resistance in the following way:

[0040] The first step is to calculate the slope resistance based on the vehicle's weight (a known parameter), wheel radius (a known parameter), and the current slope signal. This calculation method is existing technology.

[0041] The second step is to use the formula: Starting residual resistance = Gradient resistance + Wheel-end braking force - Wheel-end driving force to calculate the starting residual resistance.

[0042] The third step is to use the formula: Slope resistance = Wheel end braking force + Wheel end driving force - Slope resistance to calculate the slope resistance.

[0043] like Figure 2 As shown, the steps by which control module 2 controls display module 1 to display the remaining starting resistance graphically and numerically include:

[0044] S11. Determine whether the vehicle speed is less than or equal to a preset first vehicle speed threshold and whether the brake pedal is not depressed. If yes, proceed to S12; otherwise, end. In this embodiment, the preset first vehicle speed threshold is 0.

[0045] S12. Determine whether the remaining starting resistance is greater than or equal to the preset first resistance threshold. If yes, proceed to S13; otherwise, proceed to S14. In this embodiment, the preset first resistance threshold is 2000N.

[0046] S13. The control display module 1 displays the preset first resistance threshold value and rectangle I. The value is located above rectangle I, and rectangle I is completely filled with dark color (i.e., displaying 2000 and rectangle I, see [reference]). Figure 4 Then execute S17.

[0047] S14. Determine whether the remaining starting resistance is greater than 0 and less than the preset first resistance threshold. If yes, execute S15; otherwise (i.e., when the remaining starting resistance is less than or equal to 0), execute S16.

[0048] S15. Control display module 1 displays the value of the remaining starting resistance and a rectangle I. The value is located above rectangle I, and the left part (i.e., slightly to the left) of rectangle I is filled with dark color. The ratio of the length of the dark-filled part of rectangle I to the total length of rectangle I is equal to k1 (see [reference]). Figure 4 Then execute S17. Here, k1 represents the ratio of the remaining starting resistance to the preset first resistance threshold. The remaining starting resistance gradually decreases, and the length of the dark-colored portion within rectangle I also gradually shortens.

[0049] S16. Control display module 1 to display the value 0 and rectangle I. The value is located above rectangle I, and rectangle I is not filled with color (corresponding to a white background displayed inside rectangle I, see [link]). Figure 4 Then execute S17.

[0050] S17. Determine whether the vehicle speed is greater than the preset second speed threshold. If yes, proceed to S18; otherwise, return to S12. In this embodiment, the preset second speed threshold is 5 km / h.

[0051] S18. Control display module 1 exits the display of remaining starting resistance (i.e., no longer displays the value and rectangle I), and then ends.

[0052] like Figure 3 As shown, the steps by which control module 2 controls display module 1 to display the slope resistance graphically and numerically include:

[0053] S21. Determine whether the vehicle speed is less than or equal to the preset first vehicle speed threshold and whether the brake pedal is not pressed. If so, execute S22; otherwise, end.

[0054] S22. Determine whether the slope resistance is greater than or equal to the preset second resistance threshold. If yes, proceed to S23; otherwise, proceed to S24. In this embodiment, the preset second resistance threshold is 2000N.

[0055] S23. The control display module 1 displays the preset value of the second resistance threshold and rectangle II. The value is located above rectangle II, and rectangle II is completely filled with dark color (i.e., displaying 2000 and rectangle II, see [reference]). Figure 4 Then execute S27.

[0056] S24. Determine whether the slope resistance is greater than 0 and less than the preset second resistance threshold. If yes, execute S25; otherwise (i.e., when the slope resistance is less than or equal to 0), execute S26.

[0057] S25. Control display module 1 displays the value of the slope resistance and rectangle II. The value is located above rectangle II, and the left part (i.e., to the left) of rectangle II is filled with dark color. The ratio of the length of the dark-filled part of rectangle II to the total length of frame II is equal to k2 (see...). Figure 4 Then execute S27. Here, k2 represents the ratio of the slope resistance to the preset second resistance threshold. The slope resistance gradually decreases, and the length of the dark-colored portion within rectangle II gradually shortens.

[0058] S26. Control display module 1 to display the value 0 and rectangle II, with the value positioned above rectangle II (see [reference]). Figure 4 And the rectangle II is not filled with color (corresponding to the background being white in the rectangle II), then execute S27.

[0059] S27. Determine whether the vehicle speed is greater than the preset second vehicle speed threshold. If yes, execute S28; otherwise, return to execute S22.

[0060] S28. Control display module 1 exits the slope resistance display (i.e., no longer displays the value and rectangle II), and then ends.

[0061] Example 2: As Figure 5 As shown, the vehicle resistance display system in this embodiment has most of the same hardware structure and display method as that in Embodiment 1, except that:

[0062] Display module 1 is a central control display screen, and control module 2 is a central control controller.

[0063] When displaying a numerical value and rectangle I, the numerical value is located within rectangle I; when displaying a numerical value and rectangle II, the numerical value is located within rectangle II. The color of the numerical value is noticeably different from the color of the dark-filled area.

[0064] Example 3: As Figure 6 As shown, the vehicle resistance display system in this embodiment has the same hardware structure and most of the display methods as in embodiment 1. The only difference is that a triangular frame I is used instead of a rectangular frame I to display the remaining resistance at start-up, and a triangular frame II is used instead of a rectangular frame II to display the resistance to rolling backward. The right side of the triangular frame II is filled with a dark color.

[0065] Example 4: Figure 7 As shown, the vehicle resistance display system in this embodiment has the same hardware structure and most of the display methods as in Embodiment 1, with the only difference being:

[0066] When the remaining starting resistance is greater than 0 and less than the preset first resistance threshold, the control display module 1 displays the value of the remaining starting resistance and a rectangle I. The rectangle I is completely filled with dark colors and evenly distributed white dots, the number of which is proportional to k1. As the remaining starting resistance gradually decreases, the number of white dots in the rectangle I increases.

[0067] When the slope resistance is greater than 0 and less than the preset second resistance threshold, the control display module 1 displays the value of the slope resistance and a rectangle II. The rectangle II is filled with dark colors and evenly distributed white dots, and the number of white dots is proportional to k2. As the slope resistance gradually decreases, the number of white dots in the rectangle II increases.

Claims

1. A vehicle resistance display system, characterized in that: It includes a display module (1) and a control module (2) connected to the CAN bus. The control module (2) is connected to the display module (1). The control module (2) obtains the current vehicle's slope signal, wheel-end braking force, wheel-end driving force, vehicle speed signal and brake pedal signal from the CAN bus, calculates the remaining starting resistance and the rolling resistance, and controls the display module (1) to display the remaining starting resistance and the rolling resistance graphically. The control module (2) controls the display module (1) to display the remaining starting resistance and the slope resistance graphically as follows: If the remaining starting resistance is greater than or equal to the preset first resistance threshold, the control display module (1) displays frame I, and the entire frame I is filled with color; If the remaining starting resistance is greater than 0 and less than the preset first resistance threshold, the control display module (1) displays frame I, and the left or right part of frame I is filled with color, and the ratio of the length of the filled part of frame I to the total length of frame I is equal to the ratio of the remaining starting resistance to the preset first resistance threshold. If the remaining resistance at the start is less than or equal to 0, the control display module (1) displays frame I, and the frame I is not filled with color; If the slope resistance is greater than or equal to the preset second resistance threshold, the control display module (1) displays frame II, and the entire frame II is filled with color; If the slope resistance is greater than 0 and less than the preset second resistance threshold, the control display module (1) displays frame II, and the left or right part of frame II is filled with color, and the ratio of the length of the filled part of frame II to the total length of frame II is equal to the ratio of the slope resistance to the preset second resistance threshold. If the slope resistance is less than or equal to 0, the control display module (1) displays frame II, and the frame II is not filled with color.

2. A vehicle resistance display system, characterized in that: It includes a display module (1) and a control module (2) connected to the CAN bus. The control module (2) is connected to the display module (1). The control module (2) obtains the current vehicle's slope signal, wheel-end braking force, wheel-end driving force, vehicle speed signal and brake pedal signal from the CAN bus, calculates the remaining starting resistance and the rolling resistance, and controls the display module (1) to display the remaining starting resistance and the rolling resistance through graphics and numerical values. The control module (2) controls the display module (1) to display the remaining starting resistance and the slope resistance graphically and numerically as follows: If the remaining starting resistance is greater than or equal to the preset first resistance threshold, the control display module (1) displays the value of the preset first resistance threshold and the frame I, and the entire frame I is filled with color; If the remaining starting resistance is greater than 0 and less than the preset first resistance threshold, the control display module (1) displays the value of the remaining starting resistance and the frame I, and the left or right part of the frame I is filled with color, and the ratio of the length of the filled part in the frame I to the total length of the frame I is equal to the ratio of the remaining starting resistance to the preset first resistance threshold. If the remaining starting resistance is less than or equal to 0, the control display module (1) displays the value 0 and the frame I, and the frame I is not filled with color; If the slope resistance is greater than or equal to the preset second resistance threshold, the control display module (1) displays the value of the preset second resistance threshold and the frame II, and the entire frame II is filled with color. If the slope resistance is greater than 0 and less than the preset second resistance threshold, the control display module (1) displays the value of the slope resistance and the frame II, and the left or right part of the frame II is filled with color, and the ratio of the length of the filled part in the frame II to the total length of the frame II is equal to the ratio of the slope resistance to the preset second resistance threshold. If the slope resistance is less than or equal to 0, the control display module (1) displays the value 0 and the frame II, and the frame II is not filled with color.

3. A vehicle resistance display system, characterized in that: It includes a display module (1) and a control module (2) connected to the CAN bus. The control module (2) is connected to the display module (1). The control module (2) obtains the current vehicle's slope signal, wheel-end braking force, wheel-end driving force, vehicle speed signal and brake pedal signal from the CAN bus, calculates the remaining starting resistance and the rolling resistance, and controls the display module (1) to display the remaining starting resistance and the rolling resistance through graphics and numerical values. The control module (2) controls the display module (1) to display the remaining starting resistance and the slope resistance graphically and numerically as follows: If the remaining starting resistance is greater than or equal to the preset first resistance threshold, the control display module (1) displays the value of the preset first resistance threshold and the frame I, and the entire frame I is filled with color; If the remaining starting resistance is greater than 0 and less than the preset first resistance threshold, the control display module (1) displays the value of the remaining starting resistance and the frame I, and the frame I is filled with color and white dots are evenly distributed. The number of white dots is proportional to k1; where k1 represents the ratio of the remaining starting resistance to the preset first resistance threshold. If the remaining starting resistance is less than or equal to 0, the control display module (1) displays the value 0 and the frame I, and the frame I is not filled with color; If the slope resistance is greater than or equal to the preset second resistance threshold, the control display module (1) displays the value of the preset second resistance threshold and the frame II, and the entire frame II is filled with color. If the slope resistance is greater than 0 and less than the preset second resistance threshold, the control display module (1) displays the value of the slope resistance and the frame II, and the frame II is filled with color and white dots are evenly distributed. The number of white dots is proportional to k2; where k2 represents the ratio of the slope resistance to the preset second resistance threshold. If the slope resistance is less than or equal to 0, the control display module (1) displays the value 0 and the frame II, and the frame II is not filled with color.

4. The vehicle resistance display system according to any one of claims 1 to 3, characterized in that: The display module (1) is an instrument display screen or a central control display screen.

5. The vehicle resistance display system according to claim 4, characterized in that: The frame I is a rectangular frame I or a triangular frame I, and the frame II is a rectangular frame II or a triangular frame II.

6. The vehicle resistance display system according to any one of claims 1 to 3, characterized in that: The control module (2) calculates the remaining starting resistance and the slope resistance in the following way: Calculate the slope resistance based on the vehicle weight, wheel radius, and current vehicle slope signal; The remaining starting resistance can be calculated using the formula: Starting resistance = Gradient resistance + Wheel-end braking force - Wheel-end driving force. The slope resistance can be calculated using the formula: Slope resistance = Wheel end braking force + Wheel end driving force - Slope resistance.

7. The vehicle resistance display system according to any one of claims 1 to 3, characterized in that: When the vehicle speed is less than or equal to the preset first vehicle speed threshold and the brake pedal is not pressed, the control module (2) controls the display module (1) to display the remaining starting resistance and the rolling resistance through graphics or graphics and numerical values. When the vehicle speed exceeds the preset second speed threshold, the control module (2) controls the display module (1) to exit the display of the remaining starting resistance and the slope resistance.

8. The vehicle resistance display system according to claim 7, characterized in that: The preset first vehicle speed threshold is 0, and the preset second vehicle speed threshold is 5 km / h.

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