Automobile door glass lifter, automobile and control method

Abstract

The invention discloses an automobile door glass lifter, an automobile and a control method, and belongs to the technical field of automobile parts. The lifter comprises a sliding block connected with automobile door glass, a piston cylinder filled with oil and an oil pump. A piston is arranged in the piston cylinder to divide the piston cylinder into a first cavity and a second cavity, and the piston is in transmission connection with the sliding block. The oil pump drives the piston to slide by adjusting oil pressure of the two cavities, then the glass is driven to ascend and descend, and stable, silent and large-thrust ascending and descending are achieved. The invention further provides an automobile loaded with the lifter. According to the control method, the vehicle speed, the glass state, the rainfall and the transverse air pressure difference are collected, automatic judgment is conducted under the conditions of high speed, full window closing and no heavy rain, the vehicle window is controlled to descend slightly, the air pressure inside and outside the vehicle is balanced, and the driving stability of the vehicle under crosswind is improved. The mute and powerful advantages of hydraulic transmission are combined with the initiative of intelligent control, and the problems that a traditional motor lifter is large in noise and delayed in response are solved.

Description

Technical Field

[0001] This invention relates to the field of automotive component structure technology, specifically to an automotive door window regulator, an automobile, and a control method. Background Technology

[0002] The function of a window regulator is to make the glass rise and fall along the guide rail at a certain speed and stop at any position of the travel. Furthermore, it can be equipped with a controller to achieve an anti-pinch function.

[0003] Currently, there are roughly four types of window regulators: rope pulley type, banjo type, cross arm type, and single arm type, all of which are directly driven by motors. Under the drive of a motor, the rope pulley type and banjo type move the slider by retracting the steel wire rope through a winding wheel, thereby driving the glass to rise and fall along the guide rail. The cross arm type, on the other hand, directly uses a motor to drive the rocker arm to raise and lower the glass.

[0004] For example, Chinese utility model patent number CN204326816U, entitled "A Window Regulator for Automobiles," proposes a hydraulic window regulator that solves the problem of how to enable the window regulator to maintain normal lowering function even when the vehicle's power is cut off. It includes a car door and glass located on the door window. The window regulator includes a lifting mechanism mounted on the door and a hydraulic system. The lifting mechanism drives the glass up and down via the hydraulic system. The hydraulic system includes at least one hydraulic cylinder, an oil pump, and an oil tank. The oil pump's inlet is connected to the oil tank, and the oil pump's outlet is connected to the hydraulic cylinder via oil circuit one. A reversing valve is installed on the oil pump's outlet. The rodless chamber of the hydraulic cylinder is connected to the reversing valve via oil circuit two, and the rod chamber of the hydraulic cylinder is connected to the reversing valve via oil circuit three. The reversing valve is also connected to the oil tank. An emergency switch is connected to the rodless chamber of the hydraulic cylinder via oil circuit four, and the emergency switch is connected to the oil tank. The emergency switch can unload the rodless chamber of the hydraulic cylinder.

[0005] This window regulator uses a hydraulic system to raise and lower the glass. However, its complex structure, with all components housed inside the door, drastically reduces the already limited door space. This makes assembling other door components difficult and significantly impacts the door's internal layout. Furthermore, the regulator is only passively controlled; it only activates after manual intervention. In actual driving, such as at high speeds when experiencing crosswinds, completely closed windows can cause vehicle imbalance, leading to deviations in yaw rate and steering wheel angle. While opening the windows to equalize air pressure can resolve this issue, current methods rely on manual control, with no reports of automatic control mechanisms. Summary of the Invention

[0006] The purpose of this application is to address the shortcomings of the aforementioned background technology and provide an automotive door window regulator, an automotive vehicle, and a control method thereof.

[0007] The technical solution of this application is: a car door window regulator, comprising: A slider, used for fixed connection with the door glass; A piston cylinder, which is a hollow cylinder body filled with hydraulic oil, has a piston installed inside that can slide along its axial direction; the piston divides the inner cavity of the piston cylinder into a first chamber and a second chamber that are independent of each other; the piston is connected to the slider in a driving connection. An oil pump is connected to the first chamber and the second chamber via oil pipelines. The oil pump drives the piston to slide by adjusting the hydraulic oil pressure in the first chamber and the second chamber, and then drives the slider to move axially along the piston cylinder through a transmission connection to drive the door window to rise and fall.

[0008] According to the present application, a car door window regulator further includes a guide rail arranged vertically inside the door; the slider is slidably connected to the guide rail.

[0009] According to the present application, an automotive door window regulator also includes a steel wire rope; one end of the steel wire rope extends into the piston cylinder and is fixedly connected to the side of the piston facing the first chamber, and the other end extends into the piston cylinder and is fixedly connected to the side of the piston facing the second chamber; the rope body of the steel wire rope is also fixedly connected to a slider, so that the movement of the piston can drive the slider to move along the guide rail through the steel wire rope.

[0010] According to the present application, a car door window regulator is provided with pulleys at both the upper and lower ends of the guide rail; the steel wire rope is wound between the upper and lower pulleys to form a closed loop.

[0011] This application also relates to a vehicle equipped with the aforementioned vehicle door window regulator.

[0012] This application also relates to a control method for controlling a car door window regulator, the window regulator including a hydraulic actuator that drives a piston via hydraulic fluid to raise and lower the door window, the control method including the following steps: Collect data on the vehicle's current speed, the open / closed status of each door window, and the current rainfall status; Based on the current vehicle speed, door glass status, and current rainfall status, determine whether to activate the automatic control mode for balancing air pressure inside and outside the vehicle; If the automatic control mode is activated, the current air pressure difference between the two sides of the vehicle is collected. Determine whether the car door windows need to be lowered based on the current air pressure difference; If it is determined that the door windows need to be lowered, the lifter is controlled to simultaneously lower the windows of both sides of the vehicle body.

[0013] According to a control method provided in this application, the method for determining whether to activate the automatic control mode includes: the current vehicle speed is greater than or equal to a set vehicle speed threshold, all door windows are fully closed, and the current rainfall condition is no rain or the rainfall intensity is lower than a set intensity threshold; if all conditions are not met, it is determined that the automatic control mode is not activated.

[0014] According to a control method provided in this application, the method for determining whether the door glass needs to be lowered includes: the absolute value of the current air pressure difference between the two sides of the vehicle is greater than or equal to a set air pressure difference threshold, and the duration of this state is greater than or equal to a set time threshold; otherwise, it is determined that the door glass does not need to be lowered.

[0015] According to a control method provided in this application, when it is determined that the door glass needs to be lowered, the target descent height and target descent speed of the door glass are calculated based on the current air pressure difference; the window regulator is controlled to drive the door glass to descend to the target descent height at the target descent speed.

[0016] According to a control method provided in this application, the target descent height of the vehicle door glass is calculated using the following formula. in: d t —Target descent height of the car door glass; K h — Door window height adjustment coefficient; v n —Correct vehicle speed; ΔP n —Correcting the pressure difference; d max —Maximum lowering height of the car door windows; Calculate the corrected speed using the following formula. in: v —Current vehicle speed; v min —Effective vehicle speed limit; v max —Effective speed limit; Calculate the corrected pressure difference using the following formula. in: ΔP —Current air pressure difference; ΔP th —Set the air pressure difference threshold; ΔP max — Triggering the upper limit of air pressure difference.

[0017] According to a control method provided in this application, the target descent speed of the vehicle door glass is calculated using the following formula. in: V t —Target descent speed of the car door glass; K V —Speed ​​adjustment coefficient of the car door glass; v n —Correct vehicle speed; dΔP n — Corrected rate of change of air pressure difference; V max —Maximum descent speed of the car door window; Calculate the corrected rate of change of air pressure difference using the following formula. in: — Rate of change of air pressure difference; dΔP max —Upper limit of effective rate of change; dΔP th — Threshold for triggering the rate of change of air pressure difference.

[0018] The advantages of this application are as follows: 1. The power regulator of this application uses hydraulic oil to transmit power, which avoids mechanical noise generated by motor gear meshing, wire rope friction, etc., as well as the impact noise at the start and stop of the motor and the end of the stroke, thus achieving a quiet lifting experience. The hydraulic system itself operates smoothly and the noise is much lower than that of traditional motors. The hydraulic system can provide a stable and huge linear thrust, which is easy to adapt to larger and heavier glass without increasing the size or adopting special designs to increase power like traditional motors. The regulator of this application uses a single oil pump controlled by oil circuit distribution, which greatly reduces the number of parts such as motors and ECUs. The oil pump can be arranged centrally or distributed, the oil circuit pipeline layout is flexible, it occupies little space inside the car door and has strong shape adaptability, providing greater freedom for the internal structure design, styling design and component layout of the car door. 2. The guide rail of this application ensures smooth and linear operation during the glass lifting process, preventing the glass from shaking or jamming, and can achieve high-quality and high-reliability lifting; it also makes this hydraulic lifter compatible with the current mainstream glass guide structure of car doors, lowering the threshold for modification and application. 3. This application adopts a steel wire rope transmission connection. The steel wire rope forms a flexible transmission, which can efficiently and reliably transmit the linear motion of the piston to the slider. At the same time, it can bypass spatial obstacles and further release the freedom of the piston cylinder in the door. By reasonably designing the pulley group, the steel wire rope can be used to achieve the effect of extending the range or saving effort, making the size and stroke design of the piston cylinder more flexible. 4. This application designs a pulley block structure. The pulleys reduce the friction of the steel wire rope, and the closed-loop design makes the force distribution in the transmission process more balanced and the lifting smoother, which helps to further reduce noise. The clever arrangement of the closed-loop steel wire rope enables long-stroke glass lifting in a limited space, making the overall structure of the system more compact. 5. This application also provides a car that includes the lifter, which integrates the various technical advantages of the lifter into the selling points of the whole vehicle, thereby improving the driving quality, safety and technological feel of the car. 6. This application also relates to an automatic control method for window regulators, which automatically controls the windows to balance the air pressure inside and outside the vehicle based on vehicle speed, window condition, rainfall, and air pressure difference. Addressing the issue that crosswinds causing air pressure differences inside and outside the vehicle can affect vehicle stability at high speeds, this application provides a proactive and intelligent solution, surpassing the traditional function of window regulators that only respond to manual commands. It establishes an automatic control framework of perception, judgment, and execution, improving vehicle stability and safety under strong crosswinds by automatically balancing air pressure, representing a combination of intelligence and safety. 7. The control method of this application clarifies the application scenario of the method, prevents accidental triggering under low speed, open window or heavy rain conditions, reflects the rigor and practicality of the design, and ensures the reliability and safety of the function; it avoids automatic window opening under unnecessary or inappropriate conditions (such as rain), and the intelligent judgment logic is more in line with user expectations and actual needs; 8. By introducing a duration threshold, this application can filter out brief, non-dangerous pressure difference fluctuations (such as the instant of overtaking a large vehicle), ensuring that control actions are triggered only under continuous pressure differences that truly affect stability, thereby improving the robustness and reliability of the system; quantifying the judgment of whether intervention is needed makes the control logic clear and executable. 9. After determining that the window needs to be lowered, this application further calculates the target descent height and speed based on the air pressure difference and performs precise control. It is no longer a simple open / close command, but dynamically adjusts the window opening (height) and response speed (speed) according to the degree of threat (size of air pressure difference), realizing on-demand adjustment and just-right intelligent control, maximizing the balance between safety (the need for ventilation) and comfort / other risks (such as noise, water splash). This refined control is made possible by the characteristic of the hydraulic system that can conveniently and precisely adjust the lifting speed by changing the oil pressure and flow rate through the controller; traditional motor systems can hardly achieve such smooth and linear speed and position control. 10. This application provides specific calculation formulas for the target descent altitude and speed, introduces concepts such as corrected vehicle speed, corrected air pressure difference, and corrected air pressure difference change rate, and normalization processing; it transforms abstract control logic into a concrete and implementable technical solution, greatly enhancing the technical content and certainty of the patent; competitors will find it difficult to design functionally equivalent alternative algorithms without infringing on this right; it positively correlates the target descent altitude with the current vehicle speed and current air pressure difference, ensuring that the ventilation volume is greater and the balance effect is better when the risk is higher; and it uses a normalization function to ensure that the output is within a safe and reasonable range. 11. This application positively correlates the target descent speed with the rate of change of air pressure difference; this means that when the air pressure difference increases sharply (indicating a sudden risk of strong crosswinds), the window will descend rapidly to respond quickly to the danger; when the change is gradual, it will descend slowly; this further optimizes the safety response performance; this control model needs to comprehensively process multiple signals from vehicle speed sensors, air pressure sensors, rain sensors, etc., demonstrating the ability of this hydraulic lifter as an intelligent execution terminal to be integrated into the vehicle's all-domain perception and control system.

[0019] This application provides a car door window regulator with a simple structure and easy control. It combines the physical advantages of hydraulic transmission with the intelligent advantages of electronic control, solves the defects of traditional regulators, improves vehicle driving safety, and has great promotional value. Attached Figure Description

[0020] Figure 1 This application includes a schematic diagram of the structure of an automotive door window regulator. Figure 2 : Flowchart of the automatic control strategy for the elevator in this application; Wherein: 1—door glass; 2—piston cylinder; 3—piston; 4—first chamber; 5—second chamber; 6—oil pump; 7—slider; 8—wire rope; 9—pulley; 10—guide rail. Detailed Implementation

[0021] The embodiments of this application are described in detail below, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0022] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] This application relates to an automotive door window regulator, including the regulator's structure and corresponding control method. The regulator uses hydraulic drive control, avoiding mechanical noise generated by motor gear meshing and wire rope friction, as well as impact noise during motor start-up, shutdown, and the end of the stroke, achieving a quiet lifting experience. The hydraulic system itself operates smoothly with significantly lower noise than traditional motors. The hydraulic system can provide stable and powerful linear thrust, easily adapting to larger and heavier windows without requiring increased size or special designs to boost power like traditional motors. This application also addresses the issue of crosswinds causing pressure differences between the inside and outside of the vehicle during high-speed driving, potentially affecting vehicle stability. It provides a proactive and intelligent solution, surpassing the traditional regulator's function of merely responding to manual commands. It establishes an automatic control framework of perception, judgment, and execution, improving vehicle stability and safety under strong crosswinds by automatically balancing air pressure.

[0026] Specifically, such as Figure 1As shown, the structure of a car door glass regulator of this application is as follows: it includes a slider 7, a piston cylinder 2, and an oil pump 6; the slider 7 is fixedly connected to the door glass 1 by means of bonding or bolt connection, etc., and is used to directly drive the glass movement; the piston cylinder 2 is a closed hollow cylinder filled with hydraulic oil, and a piston 3 that can slide along the cylinder axis (up and down direction in the figure) is installed inside; the piston 3 divides the inner cavity of the piston cylinder 2 into a first chamber 4 and a second chamber 5 that are independent and sealed; the piston 3 is connected to the slider 7 by transmission; the oil pump 6 is preferably a bidirectional gear pump or plunger pump that can be driven by an electric motor, and is connected to the first chamber 4 and the second chamber 5 through two independent oil circuits respectively; the oil pump 6 is controlled by the vehicle ECU (electronic control unit), and the direction and pressure of the output hydraulic oil can be adjusted; This application utilizes the principle of hydraulic transmission to drive the glass lifting and lowering. When the glass needs to be raised, the ECU controls the oil pump 6 to pump hydraulic oil into the first chamber 4 and simultaneously draw hydraulic oil back from the second chamber 5, thereby creating a pressure difference on both sides of the piston 3, driving the piston 3 to slide towards the second chamber 5, and driving the slider 7 and the glass to rise through the transmission connection. Conversely, when the glass needs to be lowered, the oil pump 6 reverses, pumping oil into the second chamber 5 and drawing oil from the first chamber 4, driving the piston 3 to slide in the opposite direction, causing the glass to fall.

[0027] In actual use, a lifting command is sent to the lifter. After receiving the command, the ECU controls the oil pump 6 to work in a predetermined direction and speed. By changing the oil pressure in the two chambers, the piston 3 is driven, thereby achieving precise lifting of the glass. The lifting speed can be controlled by adjusting the flow rate (speed) of the oil pump 6.

[0028] The lifter of this application uses hydraulic oil as the transmission medium, completely eliminating the mechanical impact and friction noise of traditional motor gears and wire rope drums, achieving near-silent and smooth lifting; the hydraulic system can provide linear thrust far exceeding that of a motor of the same size, and is naturally suitable for larger and heavier door windows 1 or panoramic sunroofs, without the need for specially made high-power motors to increase load; the oil pump 6 can theoretically drive the lifters of multiple doors on the same side or even the entire vehicle through oil circuit branches, laying the foundation for a design scheme that controls multiple windows with one pump and greatly reduces the number of actuators; the oil pump 6 and piston cylinder 2 can be arranged separately, and the oil circuit pipeline routing is flexible, which greatly frees up valuable space inside the door and is conducive to optimizing the internal structural layout and styling design of the door.

[0029] In some embodiments of this application, the above-described lifting device structure has been optimized, specifically, as follows: Figure 1 As shown, this embodiment also includes a guide rail 10 fixedly installed on the inner panel of the car door; the guide rail 10 is arranged vertically along the vehicle; the slider 7 is provided with a groove or roller that matches the cross-sectional shape of the guide rail 10, so that the slider 7 can slide up and down along the guide rail 10, and its movement trajectory is strictly constrained.

[0030] In this embodiment, the guide rail 10 provides rigid motion guidance and support for the slider 7 and the door glass 1. The guide rail 10 bears the weight of the glass, the lateral force during the lifting process, and the vibration load during vehicle movement, ensuring that the lifting process is always a strictly stable linear motion. The structure of the guide rail 10 greatly enhances the mechanical rigidity and guiding accuracy of the entire lifting system, preventing the glass from shaking, making abnormal noises, or derailing during the lifting process, and ensuring long-term reliability.

[0031] In a further embodiment of this application, a steel wire rope 8 is used as the connection structure between the slider 7 and the piston 3, such as... Figure 1 As shown, in this embodiment, one end of the wire rope 8 extends into the first chamber 4 of the piston cylinder 2 and is fixedly connected to the side of the piston 3 facing the first chamber 4; the other end of the wire rope 8 extends into the second chamber 5 and is fixedly connected to the side of the piston 3 facing the second chamber 5; the middle section of the wire rope 8 passes through the sealing guide hole on the cylinder body and is fixedly connected to the slider 7.

[0032] This embodiment adopts the principle of movable pulley transmission. When the piston 3 moves upward (for example, during the glass descent process), it pulls the steel wire rope 8 connected to its lower side, while simultaneously releasing the steel wire rope 8 connected to its upper side. Since the middle section of the steel wire rope 8 is fixed to the slider 7, it is equivalent to the steel wire rope 8 moving relative to the slider 7, thereby driving the slider 7 to move downward along the guide rail 10. The distance the piston 3 moves and the distance the slider 7 moves have a specific proportional relationship (such as 2:1), realizing the conversion of stroke.

[0033] In this embodiment, the steel wire rope 8 serves as a flexible transmission component, which can bypass the complex structure inside the car door (such as speakers and anti-collision beams) and place the piston cylinder 2 in the most reasonable cavity position inside the car door, greatly improving the design freedom. By changing the connection point between the piston 3 and the slider 7, a transmission ratio that extends the range or saves effort can be designed, making the size and stroke design of the piston cylinder 2 more flexible and economical.

[0034] In other embodiments of this application, the arrangement structure of the wire rope 8 has been optimized, specifically, as follows: Figure 1 As shown, in this embodiment, an upper pulley and a lower pulley are respectively provided at the upper and lower ends of the guide rail 10; the wire rope 8 is wrapped between the upper pulley and the lower pulley to form a closed loop; a section of the wire rope 8 (e.g., the middle section) is fixedly connected to the slider 7.

[0035] The pulley block formed by the upper pulley and the lower pulley changes the transmission path of the wire rope 8, forming a closed loop; when the piston 3 moves and pulls one end of the wire rope 8, the entire closed-loop wire rope 8 starts to move circularly; since the slider 7 is fixed on the rope body, the circular movement of the closed-loop wire rope 8 is converted into the linear movement of the slider 7 along the guide rail 10; when the piston 3 moves one unit distance, the slider 7 will move two times (or according to the pulley block design) the unit distance, achieving stroke amplification.

[0036] Furthermore, fixed pulleys can also be installed at the upper and lower ends of the piston cylinder 2 to play the same role.

[0037] This pulley block structure greatly reduces the bending friction resistance of the wire rope 8, making the transmission smoother and more efficient, and further reducing the running noise and energy consumption; within the limited door height, the closed-loop design配合 pulleys can achieve a larger glass lifting stroke with a shorter piston 3 stroke, making the system structure more compact and efficient.

[0038] In some embodiments of the present application, this embodiment relates to an automobile, and the automobile of this embodiment is equipped with the above hydraulic lifter, and it is equipped with the above automobile door glass 1 lifter in at least one door (such as the front left door); the oil pump 6 of the lifter is electrically connected to the vehicle battery and the main controller (BCM or dedicated ECU), and its control logic is integrated into the vehicle control network.

[0039] Integrating the hydraulic glass lifter as an execution component into the vehicle environment enables it to not only respond to local switch signals but also receive instructions from multiple upstream systems such as the body domain controller, autonomous driving module, rain sensor, and collision sensor, realizing rich linkage functions.

[0040] The driver or passenger can control the glass lifting through the physical switch on the door, the central control touch screen, or voice commands; in addition, the system can automatically perform the lifting operation according to the vehicle state.

[0041] The automobile of this embodiment improves the vehicle's NVH and luxury feeling. The silent characteristic of the hydraulic lifter directly improves the quietness of the whole vehicle. Especially in high-end models, this is a perceptible quality improvement; it provides a high-performance execution terminal for realizing functions such as intelligent lifting and safety linkage (such as automatic window lowering during collision, preventing water ingress during heavy rain) at the vehicle level; this claim extends the protection scope from component manufacturers to vehicle manufacturers, enhancing the market value and exclusivity of the patent.

[0042] In this embodiment, the car-mounted window regulator can be equipped with a pressure sensor on the oil line. By collecting the pressure value of the pressure sensor in real time, when the pressure value exceeds the set pressure threshold, it can be determined that there is a foreign object in the current window lifting path. The anti-pinch control strategy can be activated to control the window to stop lifting. After the foreign object is removed, the window can be adjusted to lift.

[0043] In some embodiments of this application, an automatic control method for balancing air pressure is also provided, specifically, as follows: Figure 2 As shown, it includes the following steps: S101: Real-time data collection of vehicle speed, opening / closing status of each door window 1, and current rainfall status (e.g., no rain, light rain, heavy rain) via vehicle sensor network. S102: Based on the current vehicle speed, the status of the door glass 1, and the current rainfall status, determine whether to activate the automatic control mode for balancing the air pressure inside and outside the vehicle; S103: If the automatic control mode is activated, the current air pressure difference between the two sides of the vehicle is collected by the air pressure sensors installed on both sides of the vehicle (such as inside the left and right rearview mirrors). S104: Determine whether it is necessary to lower the door window 1 based on the current air pressure difference; S105: If necessary, send a command to the window regulator ECU of the target door to control it to perform the operation of synchronously lowering the windows 1 of both sides of the vehicle body.

[0044] The door glass 1 control method of this embodiment is used to solve the problem that when a vehicle is traveling at high speed, due to Bernoulli's principle, lateral wind may cause a pressure difference between the two sides of the vehicle, affecting driving stability (such as generating yaw moment); by intelligently sensing and automatically lowering the window slightly, airflow can be guided to balance the internal and external air pressure, thereby improving stability.

[0045] The automatic control method for raising and lowering the door glass 1 in this embodiment is upgraded from passive execution to active prevention. By automatically balancing the air pressure, it directly improves the vehicle's handling stability in dangerous conditions such as strong crosswinds, tunnel exits, and overtaking large trucks. It is an innovative active safety function. The entire control process is fully automatic, requiring no driver distraction. The vehicle automatically handles potential risks, demonstrating the vehicle's level of intelligence.

[0046] In a further embodiment of this application, the method for determining the activation condition of the automatic control mode in step S102 above has been optimized. Specifically, the condition for determining the activation of the automatic control mode is that all of the following conditions must be met simultaneously: A. The current vehicle speed is greater than or equal to the set vehicle speed threshold (e.g., 80km / h). B. All door windows 1 are completely closed; C. The current rainfall status is "no rain", or the rainfall intensity is lower than the set intensity threshold (e.g., light rain level). If all conditions are not met, the automatic control mode will not be activated.

[0047] In this embodiment, the automatic control function for raising and lowering the car door window 1 is activated only when the vehicle is at high speed, fully sealed, and there is no risk of heavy rain, ensuring the effectiveness and safety of the function. High speed is a prerequisite for generating a significant air pressure difference; full sealing is a necessary condition for effective intervention; and the absence of heavy rain prevents rainwater from entering due to automatic window opening.

[0048] In practical applications, the system periodically (e.g., every 100ms) checks the above three conditions; only when all three flags are met will the automatic pressure balance mode flag be set.

[0049] This embodiment prevents accidental triggering by precisely defining the scenario, clarifies the functional boundaries, and avoids unnecessary or even harmful operations at low speeds, with windows open, or in heavy rain, ensuring the rigor and high reliability of the function and meeting automotive-grade safety requirements.

[0050] In other embodiments of this application, the above-mentioned window lowering judgment conditions have been optimized. Specifically, the condition for judging whether the door glass 1 needs to be lowered is that the following must be met simultaneously: D. The absolute value of the current air pressure difference between the two sides of the vehicle is greater than or equal to the set air pressure difference threshold (e.g., 50Pa). E. The duration of the state described in condition D above is greater than or equal to a set time threshold (e.g., 2.0 seconds). If any of the above conditions are not met, it is determined that it is not necessary to lower the door window 1 at present.

[0051] This embodiment introduces duration judgment, which is an effective software filtering method; brief pressure difference fluctuations (such as passing road signs or bridge joints) will not trigger the action, only continuous pressure differences that may truly threaten stability will trigger the system response.

[0052] In actual operation, the system continuously compares the absolute value of the current air pressure difference with the set air pressure difference threshold in active mode. When the absolute value of the current air pressure difference is greater than or equal to the set air pressure difference threshold for the first time, a timer is started. If the absolute value of the current air pressure difference falls below the set air pressure difference threshold before the timer reaches the set time threshold, the timer is reset. If the absolute value of the current air pressure difference is still greater than or equal to the set air pressure difference threshold when the timer reaches the set time threshold, a window reduction judgment is triggered.

[0053] This judgment strategy in the embodiment effectively filters out transient interference signals, greatly reducing the false alarm rate and malfunction rate of the system, making control decisions more accurate and reliable.

[0054] In some embodiments of this application, this embodiment optimizes step S105 above, further including, based on the actual determination that window reduction is needed: Based on the current air pressure difference, the target descent height and target descent speed of the door glass 1 are calculated; then, the window regulator is controlled to drive the door glass 1 to descend to the target descent height at the target descent speed.

[0055] This embodiment upgrades the approach from whether to intervene to how to intervene optimally; it dynamically adjusts the window opening (pressure relief area) and response speed based on the magnitude and changing trend of the air pressure difference, eliminating safety hazards in the most economical and comfortable way.

[0056] In actual operation, when the ECU triggers the window lowering command, it does not simply lower the glass by a fixed height. Instead, it first calls the internal algorithm to calculate the target lowering height and target lowering speed based on real-time sensor data, and then sends a precise command to the hydraulic lift to move to the target lowering height at the target lowering speed.

[0057] The control method in this embodiment achieves intelligent control of the descent of the door glass 1. A small pressure difference results in a slight descent, while a large pressure difference results in a larger descent; a gradual change in pressure leads to a slower descent, while a rapid change leads to a faster descent. This minimizes the impact on interior noise and comfort while ensuring safety. It further highlights the advantages of hydraulic system control. This linear and precise control of speed and position is easily achieved by adjusting the flow and pressure of the oil pump 6. Compared to the PWM speed regulation of traditional motors, its control is smoother and its response is more direct, perfectly supporting this advanced control strategy.

[0058] In a preferred embodiment of this application, the calculation methods for the target descent height and target descent speed described above have been optimized. Specifically, the target descent height of the car door glass 1 is calculated according to the following formula: in: d t —Target descent height of the car door glass; K h —The height adjustment coefficient of the car door glass 1 was obtained through calibration; v n —Correct vehicle speed; ΔP n —Correcting the pressure difference; d max —Maximum descent height of door glass 1, based on the set value of the structure of door glass 1; Calculate the corrected speed using the following formula. in: v —Current vehicle speed; v min —Effective vehicle speed lower limit, set value, such as 80km / h; v max —The effective speed limit, a set value, such as 120km / h; Calculate the corrected pressure difference using the following formula. in: ΔP —Current air pressure difference; ΔP th —Set the pressure difference threshold, such as 20 Pa; ΔP max — Trigger the upper limit of the air pressure difference, set value, such as 50pa.

[0059] Calculate the target descent speed of the car door glass 1 using the following formula. in: V t —Target descent speed of the car door glass; K V —Speed ​​adjustment coefficient of door glass; v n —Correct vehicle speed; dΔP n — Corrected rate of change of air pressure difference; V max —Maximum descent speed of door glass 1, set value, for example, 50mm / s; Calculate the corrected rate of change of air pressure difference using the following formula. in: — Rate of change of air pressure difference; dΔP max —Upper limit of effective rate of change; dΔP th — Threshold for triggering the rate of change of air pressure difference.

[0060] The calculation model constructed in this embodiment linearly correlates the target descent height with vehicle speed and air pressure difference (through a normalization factor); the faster the vehicle speed and the greater the air pressure difference, the greater the descent height required for the door glass 1; the min / max function ensures that the calculation results are limited to a reasonable range of [0,1], and then multiplied by... d max The final physical altitude is obtained; the ECU collects the current vehicle speed and current air pressure difference in real time, and iteratively calculates the corrected speed and corrected air pressure difference according to the formula to finally obtain the target descent altitude.

[0061] The core of the model for calculating the target descent speed is the rate of deterioration of the air pressure difference. When the air pressure difference increases sharply (possibly due to a sudden strong gust of wind), danger is imminent, so a faster descent speed is needed to quickly establish a pressure relief channel. Similarly, vehicle speed is also an influencing factor. The ECU calculates the rate of change of air pressure difference in real time and obtains the corrected rate of change of air pressure difference through a formula, thereby calculating the target descent speed.

[0062] This embodiment transforms complex physical problems into executable mathematical models, making control based on evidence and achieving optimal results; it also sets safe control limits through parameters to prevent over-response.

[0063] This embodiment responds not only to the magnitude of the air pressure difference but also to the rate of its change, enabling the system to have a certain degree of forward warning and emergency response capabilities, thus enhancing safety. This algorithm comprehensively processes information from multiple sensors and performs complex calculations, demonstrating that the hydraulic lift has been deeply integrated into the vehicle's all-domain perception, decision-making, and control system, becoming part of the intelligent chassis or body domain control.

[0064] The automotive door window regulator of this application is pre-installed inside the vehicle door. In actual use: 1. Normal manual control mode: The driver can control any window via a switch; the command is sent to the central controller, which controls the oil pump of the corresponding door's hydraulic circuit to rotate forward or reverse according to the command direction, driving the piston in the piston cylinder to move; the piston's movement is converted into the precise linear movement of the slider along the guide rail through a closed-loop transmission system composed of steel wire rope and pulley block, thereby driving the glass to rise and fall smoothly and quietly; during this process, the system can achieve anti-pinch function by monitoring the oil circuit pressure; 2. Intelligent security linkage mode: When a collision occurs (triggered by the collision sensor) or water ingress is detected inside the vehicle (triggered by the liquid sensor), regardless of the current state, the controller sends the highest priority command to the window regulators of all doors, controlling the oil pumps to work at maximum speed in the direction of lowering the windows. Through hydraulic drive (power-off lowering can be achieved through an independent pressure relief valve if necessary), all windows are lowered to the lowest level for emergency escape or rescue. 3. Automatic air pressure balance mode: This mode runs automatically as a background daemon process: Step 1: Mode Activation Determination; While the vehicle is in motion, the system continuously monitors the current vehicle speed, the closed status of each door window, and the current rainfall status; if the current vehicle speed is greater than or equal to the set speed threshold, all door windows are fully closed, and the current rainfall status is no rain or the rainfall intensity is lower than the set intensity threshold, the system activates the automatic control mode. Step 2: Continuous perception and judgment; After the automatic control mode is activated, the system reads the data from the left and right side air pressure sensors (obtained through the air pressure sensors on the left and right sides of the vehicle body) and calculates the real-time lateral air pressure difference and its rate of change. Step 3: Decision on whether to intervene; The system only determines that intervention is needed when the continuous time exceeds the set time threshold and the absolute value of the current air pressure difference is not less than the set air pressure difference threshold; This step filters out instantaneous interference; Step 4: Calculate personalized control instructions; when intervention is determined to be necessary, the system immediately performs the following calculations: Calculate the normalized corrected speed according to the formula based on the current vehicle speed; Calculate the normalized corrected pressure difference based on the current pressure difference using the formula. Based on the current rate of change of air pressure difference, calculate the normalized corrected rate of change of air pressure difference according to the formula. Using the above formula, the target's descent altitude and descent speed can be calculated; Step 5: Precise hydraulic execution; The controller sends the calculated target descent height and target descent speed commands to the hydraulic lift ECU; The ECU precisely adjusts the speed and direction of the oil pump, controls the hydraulic oil flow and pressure of the piston cylinder, drives the piston to move at the target descent speed, and then drives the car window glass to descend smoothly and accurately to the target descent height through the wire rope pulley mechanism; Step Six: Continuous Monitoring and Recovery; After the window is lowered, the system continuously monitors the current air pressure difference; when it detects that the current air pressure difference has been lower than the recovery threshold (e.g., 30Pa) for a certain period of time, or the activation conditions are broken (e.g., vehicle speed decreases, or it starts to rain), the system controls the oil pump to work in reverse, quietly closing and resetting the window.

[0065] Through the above comprehensive operating methods, this application perfectly combines a quiet and powerful hydraulic actuator, a stable and reliable mechanical transmission, and a precise and intelligent multi-sensor control algorithm, which not only provides an excellent basic lifting experience, but also realizes advanced functions such as active safety and emergency escape, representing the technological direction of the next generation of automotive window lifting systems.

[0066] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made to this application without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this application as claimed. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A motor vehicle door glass lifter, characterized by, The glass lifter comprises a hydraulic actuator driven by oil to drive a piston to lift or lower the door glass, and the control method comprises the following steps: Collecting the current vehicle speed, the opening and closing state of each door glass, and the current rainfall state; Judging whether to activate the automatic control mode for balancing the air pressure inside and outside the vehicle based on the current vehicle speed, the state of the door glass, and the current rainfall state; If the automatic control mode is activated, collecting the current air pressure difference between the left and right sides of the vehicle; 2. A vehicle door glass lifter according to claim 1, wherein Judging whether to lower the door glass based on the current air pressure difference; 3. A vehicle door glass lifter according to claim 2, wherein If it is judged to lower the door glass, controlling the lifter to perform the operation of synchronously lowering the door glasses on both sides of the vehicle body.

4. A vehicle door glass lifter according to claim 3, wherein The method for judging whether to activate the automatic control mode comprises: the current vehicle speed is greater than or equal to a set speed threshold value, all door glasses are in a completely closed state, and the current rainfall state is no rain or the rainfall intensity is lower than a set intensity threshold value; if all conditions are not met, it is judged that the automatic control mode is not activated.

5. An automobile characterized by comprising: The method for judging whether to lower the door glass comprises: the absolute value of the current air pressure difference between the left and right sides of the vehicle is greater than or equal to a set air pressure difference threshold value, and the state lasts for a time greater than or equal to a set time threshold value; otherwise, it is judged that the door glass does not need to be lowered.

6. A control method for controlling a vehicle door glass lifter, characterized by, The glass lifter comprises a hydraulic actuator driven by oil to drive a piston to lift or lower the door glass, and the control method comprises the following steps: Collecting the current vehicle speed, the opening and closing state of each door glass, and the current rainfall state; Judging whether to activate the automatic control mode for balancing the air pressure inside and outside the vehicle based on the current vehicle speed, the state of the door glass, and the current rainfall state; If the automatic control mode is activated, collecting the current air pressure difference between the left and right sides of the vehicle; Judging whether to lower the door glass based on the current air pressure difference; If it is judged to lower the door glass, controlling the lifter to perform the operation of synchronously lowering the door glasses on both sides of the vehicle body.

7. The control method of claim 6, wherein The method for judging whether to activate the automatic control mode comprises: the current vehicle speed is greater than or equal to a set speed threshold value, all door glasses are in a completely closed state, and the current rainfall state is no rain or the rainfall intensity is lower than a set intensity threshold value; if all conditions are not met, it is judged that the automatic control mode is not activated.

8. The control method of claim 6, wherein, The method for judging whether to lower the door glass comprises: the absolute value of the current air pressure difference between the left and right sides of the vehicle is greater than or equal to a set air pressure difference threshold value, and the state lasts for a time greater than or equal to a set time threshold value; otherwise, it is judged that the door glass does not need to be lowered.

9. The control method of claim 8, wherein, When it is determined that the vehicle door glass needs to be lowered, a target lowering height and a target lowering speed of the vehicle door glass are calculated based on the current air pressure difference; and the lifter is controlled to drive the vehicle door glass to be lowered to the target lowering height at the target lowering speed.

10. The control method of claim 9, wherein The target lowering height of the vehicle door glass is calculated according to the following formula, wherein: ΔP t - target lowering height of the door glass K h - a coefficient of height adjustment of the door glass; v n - correct the vehicle speed; The target lowering speed of the vehicle door glass is calculated according to the following formula, n - correct air pressure difference; The corrected vehicle speed is calculated according to the following formula, max - maximum lowering height of the door glass; The corrected air pressure difference is calculated according to the following formula, wherein: v - current vehicle speed; v min — lower limit of effective vehicle speed; v max — upper limit of effective vehicle speed; ΔP wherein: The target lowering speed of the vehicle door glass is calculated according to the following formula, - the current barometric pressure difference; dΔP th - setting a threshold for the air pressure difference; The corrected air pressure difference change rate is calculated according to the following formula, max — Trigger air pressure difference upper limit.

11. The control method of claim 10, wherein, dΔP wherein: V t - target lowering speed of the door glass K V - a vehicle door glass speed adjustment coefficient; v n - Corrected vehicle speed; dΔP n - the rate of change of the modified air pressure difference; V max - maximum lowering speed of the door glass; ​ wherein: - rate of change of air pressure difference; ​ max — upper limit of the effective rate of change; ​ th - rate of change of air pressure difference trigger threshold.

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