A vehicle active suspension structure and control method thereof

Abstract

The present invention discloses an automobile active suspension structure and a control method thereof, which relates to the technical field of automobile chassis, including a wheel, on which a McPherson-type active suspension composed of a lateral stabilizer bar and an axle is provided, and an electromagnetic shock absorber is provided above the McPherson-type active suspension. The present invention improves the original McPherson-type active suspension by adding an electromagnetic shock-absorbing structure thereto, which not only alleviates the defects of the original shock absorber being prone to oil leakage and weak anti-roll and brake nodding capabilities, but also allows the automobile suspension to be actively controlled and adjusted, so that the automobile can adapt to various working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of automobile chassis, and in particular to an automobile active suspension structure and a control method thereof. Background Art

[0002] There are many types of suspensions equipped in cars nowadays. According to the structure, they can be roughly divided into McPherson independent suspension, transverse arm independent suspension, longitudinal arm independent suspension, double wishbone independent suspension, and multi-link independent suspension. The most widely used one is the McPherson independent suspension, which is composed of coil springs, shock absorbers, and triangular lower arm. Most models will also add a lateral stabilizer bar. The advantages of this suspension are low cost, simple manufacturing, small space occupation, and light weight; the disadvantages are poor stability, weak anti-roll and brake nodding capabilities, and adding a stabilizer bar can alleviate the problem but cannot fundamentally solve the problem. The durability is not high, and the shock absorber is prone to oil leakage and needs to be replaced regularly. Summary of the invention

[0003] In view of the above problems, an object of the present invention is to provide an automobile active suspension structure and a control method thereof.

[0004] To solve the above problems, the present invention provides the following technical solutions:

[0005] An automobile active suspension structure comprises a wheel, on which a MacPherson type active suspension consisting of a lateral stabilizer bar and an axle is arranged, and above which an electromagnetic shock absorber is arranged.

[0006] The present invention also provides a control method for an active suspension structure of an automobile, specifically:

[0007] Parking status: When the vehicle circuit is connected, the vehicle VCU will self-check whether the owner has turned on the active suspension. If it is confirmed to be turned on, the VCU will send a signal to the active suspension control module, and the control module will adjust the height of the car to normal and the suspension hardness to moderate; if the on-state is not confirmed, the vehicle speed sensor will feed back the vehicle speed information to the VCU, and the VCU will determine whether it is in the parking state. At this time, the on-board gyroscope determines whether the car is on a ramp or an uneven road. If it is on a flat road without a ramp, the VCU sends a command to the active suspension control module, and the control module will adjust the suspension state, reduce the suspension height, and lower the vehicle posture; if the gyroscope determines that the car is on a ramp or an uneven road, the VCU will adjust the suspension state according to the vehicle state feedback from the gyroscope to make the vehicle state level;

[0008] Driving status: The signal from the vehicle speed sensor is fed back to the VCU. If the VCU determines that the vehicle is in driving status, the vehicle height sensor, on-board radar and gyroscope will feed back the vehicle turning and road information to the VCU, and the VCU will send a signal to the active suspension controller to control the corresponding suspension for adjustment;

[0009] When the speed sensor determines that the vehicle speed drops to 0, it will feed back a parking signal to the VCU. The VCU determines whether the vehicle is stopped in the parking gear and the handbrake is pulled. If not, it will continue to maintain the original state; if it is detected that the parking gear is engaged and the handbrake is pulled, the sensor on the door will detect whether the door is opened. If not, the VCU will send a command to the active suspension controller, and the controller will control to lower the suspension height, lower the vehicle posture, and prepare for passengers to get off the vehicle; if the door opening signal is detected, the VCU will send a command to the active suspension controller, and select the side kneeling direction of the vehicle according to the door opening. If both sides are opened at the same time, the suspension height of the vehicle will be lowered to allow the owner to preset the height for getting off the vehicle;

[0010] When the vehicle is turned off but the key is detected in the car, the "half-hour working mode" is adopted. The power of the whole vehicle is not disconnected, the whole vehicle is in a low posture state, and it is ready for passengers to get off.

[0011] Further technology of the present invention:

[0012] Preferably, the specific method of adjusting the suspension in driving state is:

[0013] The road surface is relatively flat:

[0014] However, when the speed sensor reports that the vehicle speed is greater than or equal to 110 km / h, the VCU sends a signal to the control module to control the active suspension to adjust the suspension hardness to the "hard suspension" state to lower the height of the vehicle, and the front axle is lower than the rear axle.

[0015] If it is determined that the vehicle speed is greater than or equal to 30km / h and less than 80km / h, the VCU sends a command to the suspension controller to adjust the suspension hardness and vehicle height to a "moderate" state. The vehicle height sensor, on-board radar and gyroscope feed back the vehicle turning and road information to the VCU, and the VCU sends a signal to the active suspension controller to control the corresponding suspension to adjust;

[0016] If it is determined that the vehicle speed is less than 30km / h at this time, the VCU sends a command to the suspension controller to adjust the suspension hardness and vehicle height to the "soft suspension" state. The vehicle height sensor, on-board radar and gyroscope feedback the vehicle turning and road information to the VCU, and the VCU sends a signal to the active suspension controller to control the corresponding suspension to adjust;

[0017] Uneven road surface:

[0018] If the road is uneven, the gyroscope and height sensor will feed back the road signal to the VCU, and the VCU will send a signal to the active suspension controller. The controller will adjust the suspension hardness to a "soft suspension" state to ensure that the wheels have a larger movement space when the car is driving on uneven roads.

[0019] The beneficial effects of the above technical solution are:

[0020] The present invention improves upon the original McPherson active suspension by adding an electromagnetic shock absorbing structure, which not only alleviates the defects of the original shock absorber such as easy oil leakage and weak anti-roll and brake nodding capabilities, but also allows the automobile suspension to be actively controlled and adjusted to adapt the automobile to various working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of an active suspension structure of an automobile according to the present invention;

[0023] Figure 2 The present invention is a flow chart of a control method for an automobile active suspension structure. DETAILED DESCRIPTION

[0024] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] like Figure 1 An automobile active suspension structure comprises a wheel 1, on which a McPherson type active suspension consisting of a lateral stabilizer bar 4 and an axle 2 is arranged, and above which an electromagnetic shock absorber 3 is arranged.

[0026] like Figure 2 The present invention also provides a control method for an active suspension structure of an automobile, and the working principle or working process is as follows:

[0027] 1. Parking status: When the vehicle circuit is connected, the vehicle VCU will self-check whether the owner has turned on the active suspension. If it is confirmed to be turned on, the VCU will give a signal to the active suspension control module, and the control module will adjust the height of the car to normal and the suspension hardness to moderate; if the on-state is not confirmed, the vehicle speed sensor will feed back the vehicle speed information to the VCU, and the VCU will determine whether it is in the parking state. At this time, the on-board gyroscope determines whether the car is on a ramp or an uneven road. If it is on a flat road without a ramp, the VCU sends a command to the active suspension control module, and the control module will adjust the suspension state, reduce the suspension height, and lower the vehicle posture; if the gyroscope determines that the car is on a ramp or an uneven road, the VCU will adjust the suspension state according to the vehicle state feedback from the gyroscope to make the vehicle state level.

[0028] 2. Driving status: The signal from the vehicle speed sensor is fed back to the VCU. If the VCU determines that the vehicle is in driving status, the vehicle height sensor, on-board radar and gyroscope will feed back the vehicle turning and road information to the VCU. The VCU will send a signal to the active suspension controller to control the corresponding suspension for adjustment.

[0029] (1) The road surface is relatively flat:

[0030] However, when the speed sensor feedback shows that the vehicle speed is greater than or equal to 110km / h, the VCU sends a signal to the control module to control the active suspension to adjust the suspension hardness to the "hard suspension" state to lower the height of the vehicle, lower the center of gravity, increase the stability of the vehicle, and the front axle should be lower than the rear axle. Reduce the maximum windward cross-section and reduce the impact of the side wind on the vehicle, while reducing the fuel consumption of the vehicle.

[0031] If it is determined that the vehicle speed is greater than or equal to 30km / h and less than 80km / h, the VCU sends a command to the suspension controller to adjust the suspension hardness and vehicle height to a "moderate" state. The vehicle height sensor, on-board radar and gyroscope feed back vehicle turning and road information to the VCU, and the VCU sends a signal to the active suspension controller to control the corresponding suspension for adjustment.

[0032] If it is determined that the vehicle speed is less than 30km / h at this time, the VCU sends a command to the suspension controller to adjust the suspension hardness and vehicle height to the "soft suspension" state to increase the driver's comfort. The vehicle height sensor, on-board radar and gyroscope feedback the vehicle's turning and road information to the VCU, and the VCU sends a signal to the active suspension controller to control the corresponding suspension for adjustment.

[0033] (2) Uneven road surface:

[0034] If the road is uneven, the vehicle speed will definitely not be very fast. The gyroscope and height sensor will feed back the road signal to the VCU, and the VCU will send a signal to the active suspension controller. The controller will adjust the suspension hardness to a "soft suspension" state to ensure that the wheels have a larger movement space when the car is driving on uneven roads.

[0035] 3. When the vehicle speed sensor determines that the vehicle speed drops to 0, it will feedback the parking signal to the VCU. The VCU will determine whether the vehicle is stopped in the parking gear and the handbrake is pulled. If not, it will continue to maintain the original state; if it is detected that the parking gear is engaged and the handbrake is pulled, the sensor on the door will detect whether the door is opened. If not, the VCU will send a command to the active suspension controller, and the controller will control the lowering of the suspension height, lower the posture of the whole vehicle, and prepare for the passengers to get off the vehicle; if the door opening signal is detected, the VCU will send a command to the active suspension controller, and select the side kneeling direction of the whole vehicle according to the opening of the door. If both sides are opened at the same time, the suspension height of the whole vehicle will be lowered to allow the owner to preset the getting off height.

[0036] 4. When the vehicle is turned off but the key is detected in the car, the "half-hour working mode" is used. The power of the vehicle is not disconnected, the vehicle is in a low posture state, and passengers are ready to get off. Working principle or working process

[0037] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A control method for an active suspension structure of an automobile, comprising a wheel, wherein the wheel is provided with a McPherson type active suspension consisting of a lateral stabilizer bar and an axle, characterized in that: An electromagnetic shock absorber is provided above the McPherson active suspension; The specific control method is: Parking status: When the vehicle circuit is connected, the vehicle VCU will self-check whether the owner has turned on the active suspension. If it is confirmed to be turned on, the VCU will send a signal to the active suspension control module, and the control module will adjust the height of the car to normal and the suspension hardness to moderate; if the on-state is not confirmed, the vehicle speed sensor will feed back the vehicle speed information to the VCU, and the VCU will determine whether it is in the parking state. At this time, the on-board gyroscope determines whether the car is on a ramp or an uneven road. If it is on a flat road without a ramp, the VCU sends a command to the active suspension control module, and the control module will adjust the suspension state, reduce the suspension height, and lower the vehicle posture; if the gyroscope determines that the car is on a ramp or an uneven road, the VCU will adjust the suspension state according to the vehicle state feedback from the gyroscope to make the vehicle state level; Driving status: The signal from the vehicle speed sensor is fed back to the VCU. If the VCU determines that the vehicle is in driving status, the vehicle height sensor, on-board radar and gyroscope will feed back the vehicle turning and road information to the VCU, and the VCU will send a signal to the active suspension controller to control the corresponding suspension for adjustment; When the speed sensor determines that the vehicle speed drops to 0, it will feed back a parking signal to the VCU. The VCU determines whether the vehicle is stopped in the parking gear and the handbrake is pulled. If not, it will continue to maintain the original state; if it is detected that the parking gear is engaged and the handbrake is pulled, the sensor on the door will detect whether the door is opened. If not, the VCU will send a command to the active suspension controller, and the controller will control to lower the suspension height, lower the vehicle posture, and prepare for passengers to get off the vehicle; if the door opening signal is detected, the VCU will send a command to the active suspension controller, and select the side kneeling direction of the vehicle according to the door opening. If both sides are opened at the same time, the suspension height of the vehicle will be lowered to allow the owner to preset the height for getting off the vehicle; When the vehicle is turned off but the key is detected in the vehicle, the "half-hour working mode" is used. The vehicle power is not disconnected, the vehicle is in a low posture state, and passengers are ready to get off the vehicle; The specific method of adjusting the suspension in driving state is as follows: The road surface is relatively flat: However, when the speed sensor reports that the vehicle speed is greater than or equal to 110km / h, the VCU sends a signal to the control module to control the active suspension to adjust the suspension hardness to the "hard suspension" state to lower the height of the vehicle, and the front axle is lower than the rear axle. If it is determined that the vehicle speed is greater than or equal to 30km / h and less than 80km / h, the VCU sends a command to the suspension controller to adjust the suspension hardness and vehicle height to a "moderate" state. The vehicle height sensor, on-board radar and gyroscope feed back the vehicle turning and road information to the VCU, and the VCU sends a signal to the active suspension controller to control the corresponding suspension to adjust; If it is determined that the vehicle speed is less than 30km / h at this time, the VCU sends a command to the suspension controller to adjust the suspension hardness and vehicle height to the "soft suspension" state. The vehicle height sensor, on-board radar and gyroscope feed back the vehicle turning and road information to the VCU, and the VCU sends a signal to the active suspension controller to control the corresponding suspension to adjust; Uneven road surface: If the road is uneven, the gyroscope and height sensor will feed back the road signal to the VCU, and the VCU will send a signal to the active suspension controller. The controller will adjust the suspension hardness to a "soft suspension" state to ensure that the wheels have a larger movement space when the car is driving on uneven roads.

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