Passenger car active front spoiler device and control method

Abstract

The invention is suitable for the technical field of automobile aerodynamics, and provides an active front spoiler device of a passenger car and a control method.The active front spoiler device of the passenger car comprises a driving box installed on an automobile chassis and further comprises a spoiler, the spoiler is installed on the driving box through a double-sliding-rail structure, and the spoiler is arranged on the driving box; the lifting mechanism can lift on the driving box in the vertical direction; and the driving unit is installed in the driving box and used for driving the spoiler to ascend and descend on the driving box in the vertical direction. The device is simple and compact in structure and high in space utilization rate; meanwhile, the transmission efficiency of the double-sliding-rail structure is high, the bearing capacity is high, and the spoiler is accurately positioned.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile aerodynamics, and in particular relates to an active front spoiler device for a passenger car and a control method thereof. Background Art

[0002] With the rapid development of my country's automobile industry and related technologies, the performance of automobiles has been greatly enhanced, and the speed of automobiles has also increased significantly. The forces and torques caused by air action have an increasingly greater impact on various indicators of automobile driving. In order to ensure the safety and fuel economy of automobile driving, modern automobiles have put forward higher requirements for the air resistance and downforce of vehicles when driving at high speeds.

[0003] Common methods for improving a car's aerodynamics include adding side skirts, diffusers, and rear wings, but few people pay attention to the aerodynamics of the front end and front wheels. In fact, adding a front spoiler can reduce the lift of the airflow on the front of the chassis, reducing the area of positive pressure at the front wheels, thereby increasing the car's grip and reducing aerodynamic drag.

[0004] Therefore, in order to meet people's demand for increasing the car's grip and reducing aerodynamic drag to improve the car's driving safety and economic performance, it is necessary to design an active front spoiler device and control method for the car to overcome the shortcomings in current practical applications. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide an active front spoiler device and a control method for a passenger car, aiming to solve the problems raised in the above background technology.

[0006] The embodiment of the present invention is implemented as follows: an active front spoiler device for a passenger car includes a drive box mounted on a vehicle chassis, and further includes:

[0007] A spoiler, which is mounted on the drive box using a double-slide rail structure and can be raised and lowered vertically on the drive box;

[0008] The driving unit is installed in the driving box and is used to drive the spoiler to move up and down in a vertical direction on the driving box.

[0009] According to a further technical solution, the drive box is vertically mounted with a first guide rail and a second guide rail, the first guide rail is slidably mounted with a first slider, the second guide rail is slidably mounted with a second slider, and the first slider and the second slider are both fixedly mounted on the spoiler.

[0010] According to a further technical solution, the driving unit includes a servo motor installed in a driving box, and a rack fixedly connected to the first slider, and a gear is installed at the output end of the servo motor, and the gear is meshed with the rack.

[0011] According to a further technical solution, the spoiler includes an arc plate, an intermediate plate and a tail plate. The arc plate is arc-shaped when viewed from above. The intermediate plate is parallel to the transverse direction of the car. One end of the intermediate plate is connected to the arc plate, and the other end is connected to the tail plate.

[0012] According to a further technical solution, the spoiler is made of carbon fiber.

[0013] Another object of an embodiment of the present invention is to provide a control method for an active front spoiler device for a passenger vehicle, based on the above-mentioned active front spoiler device for a passenger vehicle, comprising the following steps:

[0014] Step 1: The vehicle's speed sensor detects the vehicle speed signal, the suspension sensor detects the vehicle's motion state and road conditions, and the motor angle sensor detects the rotation angle of the servo motor and transmits it to the control system ECU. The ECU determines the lowering height of the spoiler based on the signal;

[0015] Step 2: The ECU determines the spoiler's lowering height based on vehicle speed and road conditions. When the ECU determines that the spoiler should be retracted, the motor angle sensor determines whether the spoiler is retracted. If not, the ECU controls the servo motor to retract the spoiler. If it is retracted, the ECU stops controlling the servo motor, and the spoiler remains retracted.

[0016] When the ECU determines that the spoiler does not need to be retracted, the motor angle sensor transmits the position information of the spoiler to the ECU. The ECU determines whether the actual position of the spoiler is consistent with the expected position. If not, the ECU controls the servo motor to adjust the lowering position of the spoiler, and finally the spoiler stops at the specified position.

[0017] A further technical solution is that when the spoiler is in the designated position, the vehicle speed, road conditions and spoiler position information are re-detected and analyzed every 5 seconds, and the position of the spoiler is adjusted again.

[0018] The embodiments of the present invention provide an active front spoiler device and control method for a passenger vehicle, which have the following beneficial effects:

[0019] (1) The drive unit consists of only the servo motor and the gear rack arranged inside the drive box, resulting in a compact structure and high space utilization;

[0020] (2) The gear rack and double slide rail mechanism has high transmission efficiency, strong load-bearing capacity and precise spoiler positioning;

[0021] (3) The front end of the spoiler is arc-shaped, which guides the airflow from the front of the vehicle away from the wheels, reducing the airflow separation from the wheel rim and effectively reducing the overall aerodynamic resistance.

[0022] (4) The inner side of the spoiler is a semi-enclosed hollow structure, which is conducive to the formation of a low-pressure vortex core on the inner side of the spoiler, reducing the pressure of the airflow on the bottom of the vehicle and enhancing the downforce of the front axle of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a front-side perspective of an active front spoiler device for a passenger vehicle provided by an embodiment of the present invention;

[0024] Figure 2 A schematic structural diagram of a front-side perspective of an active front spoiler device for a passenger vehicle provided by an embodiment of the present invention;

[0025] Figure 3 A schematic structural diagram of a drive unit in an active front spoiler device for a passenger vehicle provided by an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of the installation positions of a first slider and a second slider in an active front spoiler device for a passenger vehicle provided by an embodiment of the present invention;

[0027] Figure 5 The present invention provides a schematic structural diagram of a spoiler in an active front spoiler device for a passenger vehicle according to an embodiment of the present invention.

[0028] In the accompanying drawings: drive box 1; servo motor 2; gear 3; rack 4; first slider 5; first guide rail 6; second slider 7; second guide rail 8; spoiler 9; arc plate 91; middle plate 92; tail plate 93. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0031] like Figure 1-Figure 4 As shown, an active front spoiler device for a passenger vehicle provided by one embodiment of the present invention includes a drive box 1 mounted on a vehicle chassis, and further includes:

[0032] The spoiler 9 is mounted on the drive box 1 using a double-slide rail structure and can be raised and lowered vertically on the drive box 1;

[0033] The driving unit is installed in the driving box 1 and is used to drive the spoiler 9 to move up and down in the vertical direction on the driving box 1.

[0034] In the embodiment of the present invention, when in use, it is only necessary to start the driving unit in the driving box 1, and the driving unit can drive the spoiler 9 to move up and down on the driving box 1, thereby adjusting the spoiler 9 to match different driving conditions.

[0035] like Figure 1-Figure 4 As shown, as a preferred embodiment of the present invention, the drive box 1 is installed with a first guide rail 6 and a second guide rail 8 in the vertical direction, a first slider 5 is slidably installed on the first guide rail 6, a second slider 7 is slidably installed on the second guide rail 8, and the first slider 5 and the second slider 7 are both fixedly installed on the spoiler 9.

[0036] In an embodiment of the present invention, by cooperating with the first guide rail 6 and the second guide rail 8 and the corresponding first slider 5 and the second slider 7 respectively, the spoiler 9 can be ensured to slide up and down stably on the drive box 1, thereby ensuring the movement stability of the spoiler 9.

[0037] like Figure 1 and Figure 3 As shown, as a preferred embodiment of the present invention, the driving unit includes a servo motor 2 installed in a driving box 1, and a rack 4 fixedly connected to a first slider 5, a gear 3 is installed at the output end of the servo motor 2, and the gear 3 is engaged with the rack 4.

[0038] In the embodiment of the present invention, when in use, it is only necessary to control the servo motor 2 to rotate to drive the gear 3 to rotate. Through the transmission cooperation between the gear 3 and the rack 4, the first slider 5 can be driven to move up and down along the first guide rail 6, thereby driving the spoiler 9 to move synchronously.

[0039] like Figure 1 、 Figure 2 and Figure 5 As shown, as a preferred embodiment of the present invention, the spoiler 9 includes an arc plate 91, an intermediate plate 92 and a tail plate 93. The arc plate 91 is arc-shaped when viewed from above, the intermediate plate 92 is parallel to the transverse direction of the car, one end of the intermediate plate 92 is connected to the arc plate 91, and the other end is connected to the tail plate 93.

[0040] In the embodiment of the present invention, the spoiler 9 is made of carbon fiber.

[0041] Another embodiment of the present invention provides a control method for an active front spoiler device for a passenger vehicle, based on the above-mentioned active front spoiler device for a passenger vehicle, comprising the following steps:

[0042] Step 1: The vehicle speed sensor detects the vehicle speed signal, the suspension sensor detects the vehicle motion state and road condition, and the motor angle sensor detects the rotation angle of the servo motor 2 and transmits it to the control system ECU. The ECU determines the lowering height of the spoiler 9 based on the signal;

[0043] Step 2: The ECU determines the lowering height of the spoiler 9 based on the vehicle speed and road conditions. When the ECU determines that the spoiler 9 should be retracted, the motor angle sensor determines whether the spoiler 9 is retracted. If not, the ECU controls the servo motor 2 to retract the spoiler. If it is retracted, the ECU stops controlling the servo motor 2, and the spoiler 9 is ultimately retracted.

[0044] When the ECU determines that the spoiler 9 does not need to be retracted, the motor angle sensor transmits the position information of the spoiler 9 to the ECU, and the ECU determines whether the actual position of the spoiler 9 is consistent with the expected position. If not, the ECU controls the servo motor 2 to adjust the lowering position of the spoiler 9, and finally the spoiler 9 stops at the specified position.

[0045] As a preferred embodiment of the present invention, when the spoiler 9 is in the specified position, the vehicle speed, road conditions and position information of the spoiler 9 are re-detected and analyzed every 5 seconds, and the position of the spoiler 9 is adjusted again.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An active front spoiler device for a passenger car, comprising a drive box mounted on a car chassis, characterized in that: Also includes: A spoiler, which is mounted on the drive box using a double-slide rail structure and can be raised and lowered vertically on the drive box; The driving unit is installed in the driving box and is used to drive the spoiler to move up and down in a vertical direction on the driving box.

2. The active front spoiler device for a passenger car according to claim 1, characterized in that: The drive box is vertically mounted with a first guide rail and a second guide rail, the first guide rail is slidably mounted with a first slider, the second guide rail is slidably mounted with a second slider, and both the first slider and the second slider are fixedly mounted on the spoiler.

3. The active front spoiler device for a passenger car according to claim 1, characterized in that: The driving unit includes a servo motor installed in a driving box, and a rack fixedly connected to the first slider. A gear is installed at the output end of the servo motor, and the gear is meshed with the rack.

4. The active front spoiler device for a passenger car according to claim 1, characterized in that: The spoiler includes an arc plate, an intermediate plate and a tail plate. The arc plate is arc-shaped when viewed from above. The intermediate plate is parallel to the transverse direction of the car. One end of the intermediate plate is connected to the arc plate, and the other end is connected to the tail plate.

5. The active front spoiler device for a passenger car according to claim 4, characterized in that: The spoiler is made of carbon fiber.

6. A control method for an active front spoiler device for a passenger vehicle, based on the active front spoiler device for a passenger vehicle according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: The vehicle's speed sensor detects the vehicle speed signal, the suspension sensor detects the vehicle's motion state and road conditions, and the motor angle sensor detects the rotation angle of the servo motor and transmits it to the control system ECU. The ECU determines the lowering height of the spoiler based on the signal; Step 2: The ECU determines the spoiler's lowering height based on vehicle speed and road conditions. When the ECU determines that the spoiler should be retracted, the motor angle sensor determines whether the spoiler is retracted. If not, the ECU controls the servo motor to retract the spoiler. If it is retracted, the ECU stops controlling the servo motor, and the spoiler remains retracted. When the ECU determines that the spoiler does not need to be retracted, the motor angle sensor transmits the position information of the spoiler to the ECU. The ECU determines whether the actual position of the spoiler is consistent with the expected position. If not, the ECU controls the servo motor to adjust the lowering position of the spoiler, and finally the spoiler stops at the specified position.

7. The control method of the active front spoiler device of a passenger vehicle according to claim 6, characterized in that: When the spoiler is in the designated position, the vehicle speed, road conditions and spoiler position information are re-detected and analyzed every 5 seconds, and the position of the spoiler is adjusted again.

Images