CN116811507A - Comfort parking control method and system and vehicle - Google Patents
Comfort parking control method and system and vehicle Download PDFInfo
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- CN116811507A CN116811507A CN202310452334.1A CN202310452334A CN116811507A CN 116811507 A CN116811507 A CN 116811507A CN 202310452334 A CN202310452334 A CN 202310452334A CN 116811507 A CN116811507 A CN 116811507A
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Abstract
The application relates to a comfortable parking control method, a system and a vehicle, comprising the following steps: the method comprises the steps of collecting the speed of a vehicle in real time, and judging the deceleration of the vehicle when the vehicle is in deceleration and the speed is greater than a preset speed; if the deceleration of the vehicle is at a small deceleration, adjusting the pressure release threshold to a pressure release point a1, setting the reduction of the pressure as b1, simultaneously increasing the compression stiffness c1 of front suspension damping, and reducing the height d1 of the suspension; if the deceleration of the vehicle is in the middle deceleration, adjusting the pressure release threshold to a pressure release point a2, setting the reduction of the pressure as b2, simultaneously increasing the compression stiffness c2 of front suspension damping, and reducing the height d2 of the suspension; if the deceleration of the vehicle is at a large deceleration, the pressure release threshold is adjusted to a pressure release point a3, the amount of pressure reduction is set to b3, the compression stiffness c3 of front suspension damping is increased, and the height d3 of the suspension is reduced. The application realizes comfort change under different deceleration.
Description
Technical Field
The application relates to the technical field of vehicle control, in particular to a comfortable parking control method and system and a vehicle.
Background
When the vehicle is braked, particularly emergency braking, the vehicle body can be severely pitching, and the driver is caused to be severely uncomfortable. The current general solution is: one method is to adopt a decoupling electric control braking product, and when the braking is finished, the inertia of a vehicle in parking is reduced by releasing the pressure of wheel cylinders, so that uncomfortable feeling of passengers is reduced, and the aim of comfortable parking is fulfilled. The method reduces the braking pressure at the tail end of braking, so that the braking distance of a vehicle can be increased, even when a small deceleration is stopped, the braking distance can be increased by about 0.5m, so that the risk of collision can be increased during high emergency braking, unexpected deceleration is lost, and the method is not suitable for stopping braking during large deceleration, meanwhile, the method can estimate the increased braking distance in real time, once the increased braking distance exceeds an expected value due to the jumping caused by the ground or the change of the road surface state, the system can increase the additional braking pressure to finish stopping, and serious abrupt feeling can be caused at the moment. The other method is that the vehicle uses an electric control suspension, the braking state of the vehicle is identified through a wheel acceleration sensor and a height sensor at the wheel end, and when in braking, the damping rigidity of the front suspension and the rear suspension is adjusted, the pitching of the vehicle is reduced, and the parking comfort is improved; the method can only reduce the pitching of the vehicle and can not unload the inertia of the vehicle, so that the comfort experience is not perfect.
An accurate parking control method, apparatus, storage medium based on online speed planning as disclosed in patent document CN114889675a, the method comprising: acquiring the current speed of a train; determining a current stage of the train, wherein the current stage is a coarse deceleration stage, or an adjustment stage, or a quasi-stop stage; and carrying out accurate parking control according to the current speed and the current stage. The method provided by the application divides the accurate parking stage into the coarse deceleration stage, the adjustment stage and the accurate parking stage, and performs accurate parking control according to the current speed and the current stage, so that the phenomena of mark shortage or mark passing in the parking stage can be avoided, the speed fluctuation in the vehicle control process is effectively reduced, and the parking precision and comfort in the parking process are improved. Needless to say, the technical solution disclosed in the above patent document is an advantageous attempt in the technical field.
Therefore, there is a need to develop a comfort parking control method, system and vehicle.
Disclosure of Invention
The application aims to provide a comfort parking control method, a comfort parking control system and a vehicle, which can realize comfort change under different deceleration.
In a first aspect, the present application provides a comfortable parking control method, including the steps of:
the method comprises the steps of collecting the speed of a vehicle in real time, and judging the deceleration of the vehicle when the vehicle is in deceleration and the speed is greater than a preset speed;
if the deceleration of the vehicle is at a small deceleration, adjusting the pressure release threshold to a pressure release point a1, setting the pressure reduction amount to b1, increasing the compression stiffness c1 and reducing the height d1 of the suspension;
if the deceleration of the vehicle is in the middle deceleration, adjusting the pressure release threshold to a pressure release point a2, setting the reduction of the pressure as b2, simultaneously increasing the compression stiffness c2 of front suspension damping, and reducing the height d2 of the suspension;
if the deceleration of the vehicle is at a large deceleration, the pressure release threshold is adjusted to a pressure release point a3, the amount of pressure reduction is set to b3, the compression stiffness c3 of front suspension damping is increased, and the height d3 of the suspension is reduced.
Alternatively, when the deceleration of the vehicle is equal to or less than 0.3g, indicating that the deceleration of the vehicle is at a small deceleration, a change in comfort at different decelerations can be achieved.
Alternatively, when the deceleration of the vehicle is greater than 0.3g and less than 0.6g, indicating that the deceleration of the vehicle is at the medium deceleration, a change in comfort at different decelerations can be achieved.
Alternatively, when the deceleration of the vehicle is equal to or greater than 0.6g, indicating that the deceleration of the vehicle is at a large deceleration, a change in comfort at different decelerations can be achieved.
Optionally, the pressure release point a1, the pressure release point a2, and the pressure release point a3 satisfy the following relationship: a1 > a2 > a3, and can realize comfort change under different deceleration.
Optionally, the b1, b2 and b3 satisfy the following relationship: b1 > b2 > b3, and can realize comfort change under different deceleration.
Optionally, the compressive stiffness of front suspension damping c1, the compressive stiffness of front suspension damping c2, and the compressive stiffness of front suspension damping c3 satisfy the following relationship: c3 > c2 > c1, and can realize comfort change under different deceleration.
Optionally, the height d1, the height d2 and the height d3 satisfy the following relationship: d3 > d2 > d1, and can achieve comfort variation at different decelerations.
In a second aspect, the application provides a comfortable parking control system, which comprises an information acquisition module and a controller, wherein the information acquisition module is used for acquiring the speed and the deceleration of a vehicle; the controller is connected to the information acquisition module and is configured to perform the steps of the comfort park control method according to the application.
In a third aspect, the present application provides a vehicle employing a comfort park control system as described herein.
The application has the beneficial effects that: the application is suitable for vehicles equipped with decoupling electric control braking products and electric control suspensions, combines hydraulic pressure and suspension control, determines pressure release intervention points through the magnitude of deceleration, and can realize comfort change under different deceleration by collocation and combination of pressure release quantity and suspension control amplitude; the application can avoid the defect that a single electric control suspension can not realize inertial unloading of the vehicle; meanwhile, the dependence on pressure during comfortable braking is reduced, the reduction amount of braking distance is reduced, the braking safety is ensured, and unexpected braking force loss is avoided as far as possible.
Drawings
FIG. 1 is a flow chart of the present embodiment;
FIG. 2 is a schematic block diagram of the present embodiment;
in the figure: the system comprises a 101-comfort brake control module, a 102-vehicle speed judging module, a 103-deceleration judging module, a 104-decoupling electric control brake control module and a 105-electric control suspension control module.
Detailed Description
Further advantages and effects of the present application will become readily apparent to those skilled in the art from the disclosure herein, by referring to the following description of the embodiments of the present application with reference to the accompanying drawings and preferred examples. The application may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present application. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.
In this embodiment, a comfortable parking control method includes the following steps:
acquiring the speed and the deceleration of the vehicle in real time, and judging the deceleration of the vehicle when the vehicle is in deceleration and the speed is greater than the preset speed;
if the deceleration of the vehicle is at a small deceleration, adjusting the pressure release threshold to a pressure release point a1, setting the reduction of the pressure as b1, simultaneously increasing the compression stiffness c1 of front suspension damping, and reducing the height d1 of the suspension;
if the deceleration of the vehicle is in the middle deceleration, adjusting the pressure release threshold to a pressure release point a2, setting the reduction of the pressure as b2, simultaneously increasing the compression stiffness c2 of front suspension damping, and reducing the height d2 of the suspension;
if the deceleration of the vehicle is at a large deceleration, the pressure release threshold is adjusted to a pressure release point a3, the amount of pressure reduction is set to b3, the compression stiffness c3 of front suspension damping is increased, and the height d3 of the suspension is reduced.
In this embodiment, a comfortable parking control system includes an information acquisition module and a controller, where the information acquisition module is configured to acquire a vehicle speed and a deceleration of a vehicle; the controller is connected to the information acquisition module and is configured to perform the steps of the comfort park control method according to the application.
As shown in fig. 2, in the present embodiment, the controller is divided into functions including a comfort brake control module 101, a vehicle speed determination module 102, a deceleration determination module 103, a decoupling electric control brake control module 104, and an electric control suspension control module 105. The vehicle speed judging module 102 is configured to judge a vehicle speed of the vehicle, and send a judgment result to the comfort brake control module 101, where the vehicle speed judging module 102 is connected with the comfort brake control module 101. The deceleration determination module 103 is configured to determine a deceleration of the vehicle and send a determination result to the comfort brake control module 101, where the deceleration determination module 103 is connected to the comfort brake control module 101. The decoupling electric control brake control module 104 is used for decoupling the brake demand of a driver from the actual execution of the brake and controlling the brake pressure of four wheels of the vehicle, and the decoupling electric control brake control module 104 is connected with the comfort brake control module 101. The electronic control suspension control module 105 is used for actively adjusting the front suspension damping rigidity and the rear suspension height, and the electronic control suspension control module 105 is connected with the comfort brake control module 101.
As shown in fig. 1, in this embodiment, a comfortable parking control method is implemented as follows:
s101, the vehicle speed judging module 102 judges the vehicle speed acquired in real time and sends the judging result to the comfort brake control module 101.
S102, when a driver steps on a brake pedal to decelerate, if the vehicle speed is greater than a preset vehicle speed, the comfort brake control module 101 does not work; if the vehicle speed is less than or equal to the preset vehicle speed, the step S103 is entered. Wherein: the preset vehicle speed is a calibratable value and is typically less than 20kph. The aim of the strategy is to prevent the deceleration loss when the driver presses the brake pedal to decelerate at high vehicle speed, and the problem of insufficient brake confidence is brought to the driver.
S103, the deceleration judging module 103 judges the deceleration of the vehicle and sends the judging result to the comfort brake control module 101, if the deceleration of the vehicle is less than or equal to 0.3g, the step S104 is carried out, and if the deceleration of the vehicle is greater than 0.3g, the step S105 is carried out.
S104, taking pressure control as a main part and suspension control as an auxiliary part, starting pressure unloading as early as possible according to the deceleration in a range with controllable braking distance, adjusting a pressure release threshold to a pressure release point a1, linearly increasing the pressure reduction amount b1 according to the vehicle speed, unloading the inertia of the vehicle, simultaneously increasing the compression rigidity c1 of front suspension damping, increasing the supportability, and simultaneously properly reducing the height d1 of the suspension (namely, the rear suspension stroke is reduced by d 1) so as to increase the center of gravity of a rear axle and reduce the pitching of the vehicle.
S105, if the deceleration of the vehicle is greater than 0.3g and less than 0.6g, the process proceeds to step S106, and if the deceleration of the vehicle is greater than or equal to 0.6g, the process proceeds to step S107.
S106, in the case of medium deceleration (namely, 0.3g < deceleration < 0.6 g), compared with the case of small deceleration (namely, deceleration is less than or equal to 0.3 g), the vehicle speed with reduced pressure can be smaller to reduce the increase of the braking distance, meanwhile, the unloading of the braking pressure is properly reduced linearly according to the magnitude of the deceleration, the pressure release threshold is adjusted to a pressure release point a2, the pressure reduction is set as b2, meanwhile, the control of the suspension is linearly increased, namely, the compression rigidity c2 of front suspension damping is increased, the height d2 of the suspension is reduced (namely, the rear suspension stroke is reduced d 2), and the method can achieve both comfort and deceleration confidence.
S107, if the deceleration of the vehicle is 0.6g or more, the process proceeds to step S108.
S108, when the deceleration of the vehicle is at a large deceleration, the suspension support is required to be increased as much as possible, and the pitching and rebound of the vehicle are reduced to the greatest extent: the compression rigidity c3 of front suspension damping is increased, the height d3 of rear suspension is reduced, and meanwhile, the braking pressure is reduced when the vehicle stops; meanwhile, based on the consideration of safety and deceleration confidence, the pressure release threshold is adjusted to a pressure release point a3, and the pressure reduction is set to b3.
In this embodiment, a vehicle employs the comfort parking control system as described in this embodiment.
The embodiments described above are preferred embodiments of the present application, but the embodiments of the present application are not limited to the embodiments described above, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principles of the present application should be made in the equivalent manner, and are included in the scope of the present application.
Claims (10)
1. A comfort parking control method, comprising the steps of:
the method comprises the steps of collecting the speed of a vehicle in real time, and judging the deceleration of the vehicle when the vehicle is in deceleration and the speed is greater than a preset speed;
if the deceleration of the vehicle is at a small deceleration, adjusting the pressure release threshold to a pressure release point a1, setting the reduction of the pressure as b1, simultaneously increasing the compression stiffness c1 of front suspension damping, and reducing the height d1 of the suspension;
if the deceleration of the vehicle is in the middle deceleration, adjusting the pressure release threshold to a pressure release point a2, setting the reduction of the pressure as b2, simultaneously increasing the compression stiffness c2 of front suspension damping, and reducing the height d2 of the suspension;
if the deceleration of the vehicle is at a large deceleration, the pressure release threshold is adjusted to a pressure release point a3, the amount of pressure reduction is set to b3, the compression stiffness c3 of front suspension damping is increased, and the height d3 of the suspension is reduced.
2. The comfort parking control method according to claim 1, characterized in that: when the deceleration of the vehicle is equal to or less than 0.3g, it means that the deceleration of the vehicle is at a small deceleration.
3. The comfort parking control method according to claim 1, characterized in that: when the deceleration of the vehicle is greater than 0.3g and less than 0.6g, it means that the deceleration of the vehicle is at the medium deceleration.
4. The comfort parking control method according to claim 1, characterized in that: when the deceleration of the vehicle is equal to or greater than 0.6g, it means that the deceleration of the vehicle is at a large deceleration.
5. The comfort park control system of claim 1, wherein: the pressure release points a1, a2 and a3 satisfy the following relationship: a1 > a2 > a3.
6. The comfort parking control method according to claim 1, characterized in that: the b1, b2 and b3 satisfy the following relationship: b1 > b2 > b3.
7. The comfort parking control method according to claim 1, characterized in that: the compression rigidity c1 of the front suspension damping, the compression rigidity c2 of the front suspension damping and the compression rigidity c3 of the front suspension damping meet the following relation: c3 > c2 > c1.
8. The comfort parking control method according to any one of claims 1 to 7, characterized in that: the height d1, the height d2 and the height d3 satisfy the following relationship: d3 > d2 > d1.
9. A comfort park control system, characterized by: the system comprises an information acquisition module and a controller, wherein the information acquisition module is used for acquiring the speed and the deceleration of a vehicle; the controller is connected to an information acquisition module, the controller being configured to perform the steps of the comfort parking control method according to any one of claims 1 to 8.
10. A vehicle, characterized in that: a comfort park control system as set forth in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310452334.1A CN116811507A (en) | 2023-04-24 | 2023-04-24 | Comfort parking control method and system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310452334.1A CN116811507A (en) | 2023-04-24 | 2023-04-24 | Comfort parking control method and system and vehicle |
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| Publication Number | Publication Date |
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| CN116811507A true CN116811507A (en) | 2023-09-29 |
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| CN202310452334.1A Pending CN116811507A (en) | 2023-04-24 | 2023-04-24 | Comfort parking control method and system and vehicle |
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| CN (1) | CN116811507A (en) |
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- 2023-04-24 CN CN202310452334.1A patent/CN116811507A/en active Pending
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