Vehicle and vehicle failure warning device and warning method

Abstract

The present invention discloses a vehicle and a warning device and a warning method for vehicle failure. The warning device includes an acceleration sensor, a brake master cylinder stroke sensor, an accelerator pedal sensor and a control unit arranged on the vehicle; the acceleration sensor is installed on the vehicle chassis for detecting vehicle failure and is configured to detect the real-time acceleration value of the vehicle chassis; the brake master cylinder stroke sensor is configured to detect the stroke of the brake pedal; the accelerator pedal sensor is configured to detect the stroke of the accelerator pedal; the control unit is connected to the acceleration sensor, the accelerator pedal sensor and the brake master cylinder stroke sensor in communication and is configured to receive the real-time acceleration value, the stroke of the brake pedal and the stroke of the accelerator pedal, and obtain the preset acceleration value of the vehicle chassis when the vehicle is running normally, and compare the real-time acceleration value with the preset acceleration value and judge whether the vehicle chassis has a failure.

Description

Technical Field

[0001] The present invention relates to the field of automobiles, and in particular to a vehicle and a warning device and a warning method for vehicle failure. Background Art

[0002] At present, whether a vehicle or vehicle chassis is faulty mainly depends on the driver's personal experience. The disadvantage of this method is that early chassis fault diagnosis requires a high level of driver input. Unless the driver is quite familiar with the chassis systems, it is difficult to find faults such as loose or cracked suspension arm bushings. The driver will not be able to detect faults until the fault continues to worsen and shows obvious abnormal noise or other driving abnormalities such as bushing detachment. At this time, the fault is already quite serious and users will have serious safety risks when using the vehicle.

[0003] Therefore, it is necessary to improve the current problems. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a vehicle fault warning device, the warning device comprises an acceleration sensor, a brake master cylinder stroke sensor, an accelerator pedal sensor and a control unit arranged on the vehicle;

[0005] The acceleration sensor is installed on a vehicle chassis for detecting vehicle failures and is configured to detect a real-time acceleration value of the vehicle chassis;

[0006] The brake master cylinder stroke sensor is configured to detect the stroke of the brake pedal;

[0007] an accelerator pedal sensor configured to detect a travel of an accelerator pedal;

[0008] The control unit is communicatively connected to the acceleration sensor, the accelerator pedal sensor and the brake master cylinder stroke sensor, and is configured to receive the real-time acceleration value, the stroke of the brake pedal and the stroke of the accelerator pedal, and obtain a preset acceleration value of the vehicle chassis when the vehicle is operating normally based on the steering angle value, the stroke of the brake pedal and the stroke of the accelerator pedal, and compare the real-time acceleration value with the preset acceleration value to determine whether a fault occurs in the vehicle chassis.

[0009] Optionally, the real-time acceleration value is compared with the preset acceleration value to determine whether a fault occurs in the front-rear direction of the vehicle chassis.

[0010] Optionally, the early warning device also includes: a steering wheel angle sensor configured to detect the angle value of the steering wheel, the control unit, which is communicatively connected to the steering wheel angle sensor, and is configured to receive the angle value, and obtain a preset acceleration value of the vehicle chassis when the vehicle is operating normally based on the angle value, the stroke of the brake pedal, and the stroke of the accelerator pedal, and compare the real-time acceleration value with the preset acceleration value to determine whether a fault occurs in the vehicle chassis.

[0011] Optionally, the real-time acceleration value is compared with the preset acceleration value to determine whether a fault occurs in the left and right directions of the vehicle chassis.

[0012] Optionally, the fault type includes at least one of a swing arm bushing failure in the left-right direction loosening and a subframe bushing failure in the front-rear direction loosening.

[0013] Optionally, the control unit is configured to judge that the vehicle chassis is normal when the difference between the real-time acceleration value and the preset acceleration value is less than a set threshold value; and to judge that the vehicle chassis is faulty when the difference between the real-time acceleration value and the preset acceleration value is greater than a set threshold value.

[0014] Optionally, the control unit stores a correspondence between the steering angle value, the brake pedal stroke, the accelerator pedal stroke and a preset acceleration value of the vehicle when the vehicle chassis is operating normally, and the control unit is configured to obtain the preset acceleration value when the vehicle chassis is operating normally according to the correspondence after receiving the steering angle value, the brake pedal stroke and the accelerator pedal stroke.

[0015] Optionally, the acceleration sensor is arranged on the longitudinal beam of the vehicle body to detect the real-time acceleration value of the longitudinal beam of the vehicle body.

[0016] Optionally, the steering wheel angle sensor, the brake master cylinder stroke sensor and the control unit are integrated into a body stability system of the vehicle.

[0017] Optionally, the vehicle failure warning device further includes a warning unit configured to display vehicle failure information and / or issue a failure alarm.

[0018] Optionally, the master cylinder travel sensor is configured to detect the rate of change of the travel of the brake pedal;

[0019] The accelerator pedal sensor is configured to detect a rate of change of an accelerator pedal stroke.

[0020] The present application also provides a vehicle failure early warning method, the early warning method comprising:

[0021] Detecting a real-time acceleration value of a vehicle chassis on which the acceleration sensor is installed by means of an acceleration sensor;

[0022] The travel of the brake pedal is detected by the brake master cylinder travel sensor;

[0023] detecting the travel of the accelerator pedal by an accelerator pedal sensor;

[0024] Acquiring a preset acceleration value of the vehicle chassis when the vehicle is operating normally through the travel of the brake pedal and the travel of the accelerator pedal;

[0025] comparing the real-time acceleration value with the preset acceleration value;

[0026] It is determined whether the vehicle chassis fails based on the comparison result.

[0027] Optionally, whether a fault occurs in the front-rear direction of the vehicle chassis is determined based on the comparison result.

[0028] Optionally, the steering wheel angle value is detected by a steering wheel angle sensor, and a preset acceleration value of the vehicle chassis when the vehicle is operating normally is obtained through the steering angle value, the travel of the brake pedal and the travel of the accelerator pedal.

[0029] Optionally, whether a fault occurs in the left and right directions of the vehicle chassis is determined based on the comparison result.

[0030] Optionally, when the difference between the real-time acceleration value and the preset acceleration value is less than a set threshold, the vehicle chassis is judged to be normal; when the difference between the real-time acceleration value and the preset acceleration value is greater than the set threshold, the vehicle chassis is judged to be faulty.

[0031] Optionally, an alarm is sounded if a malfunction occurs in the vehicle chassis.

[0032] Optionally, the acceleration sensor is arranged on the longitudinal beam of the vehicle body to detect the real-time acceleration value of the longitudinal beam of the vehicle body.

[0033] Optionally, detecting the travel of the brake pedal by the brake master cylinder travel sensor includes: detecting the rate of change of the travel of the brake pedal by the brake master cylinder travel sensor;

[0034] Detecting the stroke of the accelerator pedal by using the accelerator pedal sensor includes: detecting a rate of change of the stroke of the accelerator pedal by using the accelerator pedal sensor.

[0035] Optionally, the fault type includes at least one of a swing arm bushing failure in the left-right direction loosening and a subframe bushing failure in the front-rear direction loosening.

[0036] The present application also provides a vehicle, which includes the early warning device described above.

[0037] In order to solve the existing technical problems, the present invention provides a vehicle fault warning device, which includes an acceleration sensor, a rotation angle sensor, a brake master cylinder stroke sensor and a control unit arranged on the vehicle chassis; the vehicle fault warning device compares the real-time acceleration value measured by the acceleration sensor with the obtained preset acceleration value and determines whether the vehicle has a fault. The vehicle fault warning device has a simple structure and can relatively accurately monitor and warn of early faults of the vehicle chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show embodiments of the present invention and their descriptions, and are used to explain the device and principle of the present invention. In the drawings,

[0039] Figure 1 It is a structural schematic diagram of a vehicle failure warning device according to an embodiment of the present invention;

[0040] Figure 2 The figure is a flow chart of a vehicle failure early warning method in one embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the present invention more obvious, the exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described herein. Based on the embodiments of the present invention described in the present invention, all other embodiments obtained by those skilled in the art without creative work should fall within the protection scope of the present invention.

[0042] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0043] It should be understood that the present invention can be implemented in different forms and should not be interpreted as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to make the disclosure thorough and complete and to fully convey the scope of the present invention to those skilled in the art.

[0044] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be limiting of the present invention. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0045] In order to fully understand the present invention, detailed steps and detailed structures will be presented in the following description to illustrate the technical solution proposed by the present invention. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0046] In order to solve the technical problem of the present application, the present application provides a vehicle failure early warning device, such as Figure 1 The vehicle fault warning device includes an acceleration sensor 103, a brake master cylinder stroke sensor 102 and a control unit 105 arranged on the vehicle 101;

[0047] The acceleration sensor 103 is configured to detect the real-time acceleration value of the vehicle chassis;

[0048] The steering angle sensor is configured to detect a steering angle value of a steering wheel;

[0049] The brake master cylinder stroke sensor 102 is configured to detect the stroke of the brake pedal;

[0050] an accelerator pedal sensor configured to detect a stroke of the accelerator pedal;

[0051] The control unit 105 is connected to the acceleration sensor 103, the accelerator pedal sensor and the brake master cylinder stroke sensor 102, and is configured to receive the real-time acceleration value, the stroke of the brake pedal and the stroke of the accelerator pedal, and obtain the preset acceleration value of the vehicle chassis when the vehicle is operating normally according to the angle value, the stroke of the brake pedal and the stroke of the accelerator pedal, and compare the real-time acceleration value with the preset acceleration value to determine whether the vehicle chassis has a fault. In the above embodiment, the real-time acceleration value is compared with the preset acceleration value to determine whether the vehicle chassis has a fault in the front-to-back direction. For example, it is determined whether the subframe bushing is loose in the front-to-back direction.

[0052] Optionally, the early warning device further includes: a steering wheel angle sensor 106, configured to detect the steering wheel angle value, the control unit, which is in communication connection with the steering wheel angle sensor, configured to receive the angle value, and obtain the preset acceleration value of the vehicle chassis when the vehicle is operating normally according to the angle value, the travel of the brake pedal and the travel of the accelerator pedal, and compare the real-time acceleration value with the preset acceleration value to determine whether the vehicle chassis has a fault. In this example, the real-time acceleration value and the preset acceleration value are compared to determine whether the left and right directions of the vehicle chassis have a fault. For example, determine whether the left and right swing arm bushings are loose.

[0053] Among them, the vehicle fault warning device has a simple structure and can relatively accurately monitor and warn of early chassis faults, so that the vehicle driver can repair the vehicle in time to ensure the safety of the vehicle.

[0054] The acceleration sensor 103 is disposed on the vehicle chassis to detect the acceleration of the vehicle chassis in real time and obtain the real-time acceleration value.

[0055] It should be noted that the location of the acceleration sensor 103 is not limited to a specific location and can be selected according to actual needs. In one embodiment of the present application, the acceleration sensor 103 is arranged on the longitudinal beam of the vehicle body, and the acceleration value of the longitudinal beam of the vehicle body is detected to determine whether the vehicle chassis fails.

[0056] Among them, the types of faults may include, for example, the failure of the swing arm bushing to become loose left and right and the failure of the subframe bushing to become loose front and back, etc., which are not listed one by one here.

[0057] Similarly, the steering wheel angle sensor 106 may be disposed on the vehicle body to detect the steering wheel angle value.

[0058] In one embodiment of the present application, the steering wheel angle sensor 106 is disposed on the steering wheel.

[0059] Among them, the brake master cylinder stroke sensor 102 can be set on the vehicle body. In one embodiment of the present application, the brake master cylinder stroke sensor 102 is set on the brake pedal to detect the stroke of the brake pedal, that is, the depth of the brake pedal being depressed.

[0060] The control unit 105 is connected to the acceleration sensor 103, the steering wheel angle sensor 106 and the brake master cylinder stroke sensor 102 for communication, wherein the communication connection mode can be wired or wireless and is not limited to either one.

[0061] In one embodiment of the present application, the steering wheel angle sensor 106, brake master cylinder travel sensor 102 and control unit 105 can be integrated into the vehicle body stability system, that is, the existing steering wheel angle sensor 106, brake master cylinder travel sensor 102 and control unit 105 of the vehicle body stability system can be adopted.

[0062] In one embodiment of the present application, the steering wheel angle sensor 106 , the brake master cylinder travel sensor 102 and the control unit 105 are independently arranged on the vehicle body from the vehicle body stabilization system.

[0063] When the steering wheel angle sensor 106 , the brake master cylinder travel sensor 102 and the control unit 105 are integrated into the vehicle body stability system, the control unit 105 can be connected to the vehicle communication network.

[0064] The acceleration sensor 103 may be connected to the control unit 105 via the vehicle communication network, or may be connected to the control unit 105 via a data transmission line.

[0065] In one embodiment of the present application, when the acceleration sensor 103 is disposed on the longitudinal beam of the vehicle body, the acceleration sensor 103 is connected to the control unit 105 via a data transmission line.

[0066] The control unit 105 is used to receive various data signals transmitted by the acceleration sensor 103, the steering wheel angle sensor 106, and the brake master cylinder stroke sensor 102, including but not limited to real-time acceleration value, the angle value and the stroke of the brake pedal.

[0067] The control unit 105 is further configured to obtain a preset acceleration value when the vehicle is operating normally based on the steering angle value and the travel of the brake pedal.

[0068] Optionally, the control unit 105 stores a correspondence between the steering angle value and the stroke of the brake pedal when the vehicle is operating normally and a preset acceleration value of the vehicle chassis. After receiving the steering angle value and the stroke of the brake pedal, the preset acceleration value when the vehicle chassis is operating normally is obtained according to the correspondence.

[0069] Furthermore, a car model unit is provided in the control unit 105, and the car model unit stores the corresponding relationship between the steering angle value and the travel of the brake pedal and the preset acceleration value of the vehicle chassis under the normal state of the vehicle chassis.

[0070] In the present application, a preset acceleration value of the vehicle chassis when operating normally under an ideal state is obtained by using the steering angle value and the travel of the brake pedal, and then the preset acceleration value is compared with the real-time acceleration value. When the vehicle has not failed and is operating normally, the real-time acceleration value is close to the preset acceleration value under the ideal state, that is, when the difference between the real-time acceleration value and the preset acceleration value is less than or equal to the set threshold value, the vehicle chassis is normal; when the difference between the real-time acceleration value and the preset acceleration value is greater than the set threshold value, it means that the operating state of the vehicle chassis has deviated from the normal state and the vehicle has failed.

[0071] Furthermore, the vehicle failure warning device also includes a warning unit 104, and the warning unit 104 is communicatively connected to the control unit 105. For example, in one embodiment of the present application, the warning unit 104 is communicatively connected to the control unit 105 via the vehicle communication network.

[0072] The warning unit 104 receives fault information transmitted by the control unit 105 when the control unit 105 determines that the vehicle has a fault, and displays the fault information at the same time. The fault information can be prompt information of the vehicle fault, or specific information of the vehicle fault, such as prompt information of a vehicle chassis fault, or even related information of a swing arm bushing loosening and failure in the left and right directions and a subframe bushing loosening and failure in the front and rear directions.

[0073] In addition, the warning unit 104 can also send out an alarm when a vehicle chassis failure occurs to prompt the driver to perform maintenance.

[0074] The warning unit 104 may be provided separately or integrated into the vehicle body stabilization system, which is not limited here.

[0075] The composition and operation of the vehicle fault warning device are described in detail below with reference to examples.

[0076] In one embodiment of the present application, the swing arm bushing looseness failure is taken as an example for explanation. When the swing arm bushing is not faulty and the swing arm bushing functions normally, the left and right direction limit structure is normal. When the vehicle turns normally, the swing arm bushing bears the lateral force and can provide lateral force absorption through its own deformation. The acceleration sensor 103 detects the real-time acceleration value (vibration value) in the left and right directions, the steering wheel angle sensor 106 detects the steering wheel angle value, and the brake master cylinder stroke sensor 102 detects the travel of the vehicle brake pedal (for example, the distance not stepped on or stepped on), and transmits the angle value and the travel of the vehicle brake pedal and other signals to the control unit 105. The control unit 105 calculates and obtains the preset acceleration value in the left and right directions at the longitudinal beam of the vehicle body when the vehicle state is normal. By comparison, it is found that the actual measured real-time acceleration value in the left and right directions is not much different from the preset acceleration value and does not exceed the set threshold. The early warning system does not alarm.

[0077] When the swing arm bushing fails, or the left and right limit structures are damaged. When the vehicle turns, it cannot absorb the lateral force during the turn through normal deformation, and the two parts connected by the swing arm bushing collide, generating an acceleration signal peak. When the vehicle finishes turning and returns to straight driving, the lateral force disappears, and the two parts connected by the swing arm bushing collide in opposite directions, generating an acceleration signal peak in the left and right directions. The acceleration sensor 103 detects this peak and transmits it to the control unit 105. At the same time, the master cylinder travel sensor 102 detects the travel of the vehicle's brake pedal (for example, the distance not pressed or pressed). The signals will be transmitted to the control unit 105, and after calculation and comparison, if it is found that the actual measured real-time acceleration value in the left and right directions exceeds the set threshold of the preset acceleration value, it is considered that the chassis system has a fault, and an alarm message is sent to the warning unit 104, prompting the driver to contact the maintenance personnel to repair the vehicle.

[0078] In another embodiment of the present application, when the subframe bushing functions normally, the front-to-back limit structure is normal. When the vehicle brakes, the subframe bushing bears the longitudinal force in the front-to-back direction. The longitudinal force can be absorbed by the deformation of the subframe bushing itself. The acceleration sensor 103 detects the acceleration value in the front-to-back direction, the steering wheel angle sensor 106 detects that the steering wheel angle of the vehicle is zero, and the brake master cylinder stroke sensor 102 detects the depth of the vehicle brake pedal, and transmits the above-mentioned detected signal to the control unit 105. After calculation, the control unit 105 obtains the preset acceleration value in the front-to-back direction at the longitudinal beam of the vehicle body when the vehicle is in a normal state. By comparison, it is found that the actual measured real-time acceleration value in the front-to-back direction is not much different from the preset acceleration value and does not exceed the set threshold. The early warning system does not alarm.

[0079] If the subframe bushing fails, or the front-to-back limit structure is damaged. When the vehicle brakes, it cannot absorb the longitudinal force in the front-to-back direction through normal deformation, and the two components connected by the subframe bushing collide, generating an acceleration signal peak. When the vehicle stops braking and returns to accelerating, the longitudinal force is reversed, and the two components connected by the swing arm bushing collide in opposite directions. At this time, an acceleration signal peak in the front-to-back direction is also generated, and the acceleration sensor 103 detects this peak and transmits it to the control unit 105. At the same time, the master cylinder stroke sensor 102 detects that the vehicle's brake pedal is pressed and then lifted. The signals are all transmitted to the control unit 105, and after calculation and comparison, it is found that the actual measured real-time acceleration value in the front-to-back direction exceeds the set threshold of the preset acceleration value. It is considered that the chassis system has a fault, and an alarm message is sent to the warning unit 104, prompting the driver to contact maintenance personnel to repair the vehicle.

[0080] The early warning device of the present invention includes an acceleration sensor 103, a rotation angle sensor, a brake master cylinder travel sensor 102 and a control unit 105 arranged on the vehicle chassis; the early warning device of the vehicle failure compares the real-time acceleration value measured by the acceleration sensor 103 with the acquired preset acceleration value and determines whether the vehicle chassis fails. The early warning device of the vehicle failure has a simple structure and can relatively accurately monitor and warn of early chassis failures.

[0081] The present application also provides a vehicle failure early warning method, the early warning method, such as Figure 2 As shown, including:

[0082] Step S1: detecting a real-time acceleration value of a vehicle chassis on which the acceleration sensor is installed by means of an acceleration sensor;

[0083] Step S2: Detecting the travel of the brake pedal by means of a brake master cylinder travel sensor;

[0084] Step S3: detecting the stroke of the accelerator pedal by an accelerator pedal sensor;

[0085] Step S4: obtaining a preset acceleration value of the vehicle chassis when the vehicle is operating normally according to the travel of the brake pedal and the travel of the accelerator pedal;

[0086] Step S5: comparing the real-time acceleration value with the preset acceleration value;

[0087] Step S6: Determine whether the vehicle chassis fails based on the comparison result.

[0088] In the steps S1 to S6, it is used to determine whether a fault occurs in the front-to-back direction of the vehicle chassis according to the comparison result, for example, to determine whether a subframe bushing is loose in the front-to-back direction.

[0089] Optionally, when the real-time acceleration value is less than or equal to the preset acceleration value, the vehicle chassis is normal;

[0090] When the difference between the real-time acceleration value and the preset acceleration value is greater than a set threshold, the vehicle chassis fails.

[0091] Optionally, an alarm is sounded if a malfunction occurs in the vehicle chassis.

[0092] Optionally, the method further comprises: detecting the travel of the accelerator pedal by an accelerator pedal sensor;

[0093] A preset acceleration value of the vehicle chassis is calculated according to the turning angle value, the stroke of the accelerator pedal and the stroke of the brake pedal.

[0094] Optionally, the acceleration sensor is arranged on the longitudinal beam of the vehicle body to determine whether a fault occurs in the vehicle chassis.

[0095] The method further includes: detecting the steering wheel angle value through a steering wheel angle sensor, and obtaining a preset acceleration value of the vehicle chassis when the vehicle is operating normally through the steering wheel angle value, the travel of the brake pedal, and the travel of the accelerator pedal. In one example, judging whether a fault occurs in the left and right directions of the vehicle chassis according to the comparison result. For example, judging whether the left and right swing arm bushings are loose.

[0096] Among them, the vehicle failure warning method is based on the vehicle failure warning device mentioned above. The specific steps of the warning method can refer to the operation mode of the vehicle failure warning device, which will not be repeated here. The vehicle failure warning method can relatively accurately realize the monitoring and warning of early chassis failures.

[0097] The present application also provides a vehicle, the vehicle comprising the vehicle failure warning device as described above, the vehicle failure warning device comprising an acceleration sensor, a steering wheel angle sensor, a brake master cylinder stroke sensor and a control unit arranged on the vehicle;

[0098] The acceleration sensor is configured to detect a real-time acceleration value of the vehicle chassis;

[0099] The steering wheel angle sensor is configured to detect the steering wheel angle value;

[0100] The brake master cylinder stroke sensor is configured to detect the stroke of the brake pedal;

[0101] An accelerator pedal travel sensor configured to obtain a travel of an accelerator pedal;

[0102] The control unit is communicatively connected to the acceleration sensor, the steering wheel angle sensor, the accelerator pedal travel sensor and the brake master cylinder travel sensor, and is configured to receive the real-time acceleration value, the angle value, obtain the accelerator pedal travel and the brake pedal travel, calculate the preset acceleration value of the vehicle chassis based on the angle value, the accelerator pedal travel and the brake pedal travel, and compare the real-time acceleration value with the preset acceleration value to determine whether a fault occurs in the vehicle chassis.

[0103] The vehicle adopts the early warning device, which has all the advantages of the early warning device, such as the early warning device for vehicle failure has a simple structure and can relatively accurately monitor and warn of early chassis failures.

[0104] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present invention thereto. Various changes and modifications may be made therein by one of ordinary skill in the art without departing from the scope and spirit of the present invention. All such changes and modifications are intended to be included within the scope of the present invention as required by the appended claims.

[0105] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of machine software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0106] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed.

[0107] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0108] Similarly, it should be understood that in order to streamline the present invention and help understand one or more of the various inventive aspects, in the description of the exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, the method of the present invention should not be interpreted as reflecting the following intention: the claimed invention requires more features than the features explicitly stated in each claim. More specifically, as reflected in the corresponding claims, the inventive point is that the corresponding technical problem can be solved with less than all the features of a single disclosed embodiment. Therefore, the claims following the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the present invention.

[0109] It will be understood by those skilled in the art that, except for mutually exclusive features, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this specification may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0110] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0111] It should be noted that the above embodiments illustrate rather than limit the invention, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be construed as a limitation on the claims. The invention may be implemented by means of hardware comprising a number of different elements and by means of an appropriately programmed acquisition machine. In a unit claim enumerating a number of means, several of these means may be embodied by the same hardware item. The use of the words first, second, and third, etc., does not indicate any order. These words may be interpreted as names.

Claims

1. A vehicle failure warning device, characterized in that: The early warning device includes an acceleration sensor, a brake master cylinder travel sensor, an accelerator pedal sensor, a steering wheel angle sensor and a control unit arranged on the vehicle; The acceleration sensor is installed on a vehicle chassis for detecting vehicle failures and is configured to detect the real-time acceleration value of the vehicle chassis; the acceleration sensor is arranged on a vehicle body longitudinal beam and is configured to detect the real-time acceleration value of the vehicle body longitudinal beam in the front-rear direction and the left-right direction; The brake master cylinder stroke sensor is configured to detect the stroke of the brake pedal; The accelerator pedal sensor is configured to detect the travel of the accelerator pedal; The steering wheel angle sensor is configured to detect the steering wheel angle value; The control unit is communicatively connected with the acceleration sensor, the accelerator pedal sensor, the steering wheel angle sensor and the brake master cylinder stroke sensor, and is configured to receive the real-time acceleration value, the stroke of the brake pedal, the angle value and the stroke of the accelerator pedal, and obtain preset acceleration values ​​of the vehicle chassis in the front-rear direction and the left-right direction when the vehicle is operating normally according to the angle value, the stroke of the brake pedal and the stroke of the accelerator pedal, and compare the real-time acceleration value with the preset acceleration value to determine whether the vehicle chassis has a fault; The control unit is configured to: when the difference between the real-time acceleration value and the preset acceleration value is less than a set threshold, determine that the vehicle chassis is normal; When the difference between the real-time acceleration value in the front-to-rear direction and the preset acceleration value in the front-to-rear direction is greater than a set threshold, it is determined that the type of fault occurring in the vehicle chassis includes looseness and failure of a subframe bushing in the front-to-rear direction; When the difference between the real-time acceleration value in the left and right directions and the preset acceleration value in the left and right directions is greater than a set threshold, it is determined that the fault type of the vehicle chassis includes left and right looseness and failure of the swing arm bushing.

2. The vehicle failure warning device according to claim 1, characterized in that: The control unit stores the correspondence between the steering angle value, the brake pedal stroke, the accelerator pedal stroke and the preset acceleration value of the vehicle when the vehicle chassis is operating normally. The control unit is configured to obtain the preset acceleration value when the vehicle chassis is operating normally according to the correspondence after receiving the steering angle value, the brake pedal stroke and the accelerator pedal stroke.

3. The vehicle failure warning device according to claim 1, characterized in that: The steering wheel angle sensor, the brake master cylinder stroke sensor and the control unit are integrated into a body stabilization system of the vehicle.

4. The vehicle failure warning device according to claim 1, characterized in that: The vehicle failure warning device also includes a warning unit configured to display vehicle failure information and / or issue a failure alarm.

5. The vehicle failure warning device according to claim 1, characterized in that: The master cylinder travel sensor is configured to detect a rate of change of the travel of the brake pedal; The accelerator pedal sensor is configured to detect a rate of change of an accelerator pedal stroke.

6. A vehicle failure early warning method, characterized in that: The early warning method comprises: The acceleration sensor is used to detect the real-time acceleration value of the vehicle chassis on which the acceleration sensor is installed; wherein the acceleration sensor is arranged on the longitudinal beam of the vehicle body, and is used to detect the real-time acceleration value of the longitudinal beam of the vehicle body in the front-rear direction and the left-right direction; The travel of the brake pedal is detected by the brake master cylinder travel sensor; detecting the travel of the accelerator pedal by an accelerator pedal sensor; Detecting the steering wheel angle value through a steering wheel angle sensor; Obtaining preset acceleration values ​​of the vehicle chassis in the front-rear direction and the left-right direction when the vehicle is operating normally through the turning angle value, the travel of the brake pedal and the travel of the accelerator pedal; comparing the real-time acceleration value with the preset acceleration value; Judging whether the vehicle chassis fails according to the comparison result includes: When the difference between the real-time acceleration value and the preset acceleration value is less than a set threshold, it is determined that the vehicle chassis is normal; When the difference between the real-time acceleration value in the front-to-rear direction and the preset acceleration value in the front-to-rear direction is greater than a set threshold, it is determined that the type of fault occurring in the vehicle chassis includes looseness and failure of a subframe bushing in the front-to-rear direction; When the difference between the real-time acceleration value in the left and right directions and the preset acceleration value in the left and right directions is greater than a set threshold, it is determined that the fault type of the vehicle chassis includes left and right looseness and failure of the swing arm bushing.

7. The early warning method according to claim 6, characterized in that: If the vehicle chassis fails, an alarm is sounded.

8. The early warning method according to claim 6, characterized in that: Detecting the travel of the brake pedal by the brake master cylinder travel sensor includes: detecting the rate of change of the travel of the brake pedal by the brake master cylinder travel sensor; Detecting the stroke of the accelerator pedal by using the accelerator pedal sensor includes: detecting a rate of change of the stroke of the accelerator pedal by using the accelerator pedal sensor.

9. A vehicle, characterized in that: The vehicle comprises the warning device according to any one of claims 1 to 5.

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