New energy vehicle braking system control device

Abstract

The utility model discloses a new energy vehicle brake system control device which comprises a brake valve, the brake valve is respectively connected with a first air cylinder and a second air cylinder through pipelines, and the brake valve is connected with a control device through a line. The control device is connected with the electric air compressor, the electric control dryer, the rear axle pressure sensor and the rear axle pressure sensor through lines, the rear axle pressure sensor and the rear axle pressure sensor are installed on the first air cylinder and the second air cylinder respectively, and the electric air compressor is connected with the electric control dryer through a pipeline. The electric control dryer is connected with the first air cylinder and the second air cylinder through a four-loop protection valve through a pipeline, and a brake switch is arranged on the brake valve and connected with the control device through a line. The service life of the electric air compressor can be effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the field of new energy vehicles, and in particular to a braking system control device for new energy vehicles. Background Art

[0002] The traditional new energy braking system control device controls the start and stop of the electric air compressor by collecting the air pressure of the brake sensor. When the sensor error or the mechanical unloading valve releases pressure prematurely due to aging, the system cannot alarm, resulting in the driver being unable to repair the vehicle in time, causing the air compressor to continue working, causing wear and tear on the electric air compressor, and posing a safety hazard. At the same time, due to the system sensor failure, the system cannot determine that the air compressor cannot stop working, causing energy loss of the air compressor. Summary of the invention

[0003] In order to solve the above problems, the technical solution of the utility model is: a new energy vehicle braking system control device, which includes a brake valve, the brake valve is connected to the air tank one and the air tank two through pipelines, the brake valve is connected to the control device through lines, the control device is connected to the electric air compressor, the electric control dryer, the rear axle pressure sensor and the rear axle pressure sensor through lines, the rear axle pressure sensor and the rear axle pressure sensor are respectively installed on the air tank one and the air tank two, the electric air compressor is connected to the electric control dryer through a pipeline, the electric control dryer is connected to the air tank one and the air tank two through a pipeline through a four-circuit protection valve, and a brake switch is arranged on the brake valve, and the brake switch is connected to the control device through lines.

[0004] The beneficial effects of the utility model are as follows: the control device reads the working state of the electric air compressor, the signal content of the rear axle pressure sensor and the front axle pressure sensor, and the working state of the brake switch, and compares the signal state with the normal working state, and analyzes the working state through the control device to determine whether it is working normally. If there is a difference from the normal working state, perform fault processing. The control device specifies the fault mode, identifies the fault mode of the current braking system, and identifies the current fault type for different abnormal working states. Remind the driver to pay attention to and handle the fault, and at the same time, under the premise of ensuring the safety of the vehicle in the fault mode, stop the operation of the electric air compressor, so that the electric air compressor can work intermittently, extending the service life of the electric air compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0006] Figure 1 It is a structural schematic diagram of the utility model.

[0007] In the figure: brake valve 1, brake switch 2, air reservoir 1 3, rear axle pressure sensor 4, front axle pressure sensor 5, control device 6, electronically controlled dryer 7, electric air compressor 8, air reservoir 2 9, four-circuit protection valve 10. DETAILED DESCRIPTION

[0008] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many physical details will be described together in the following description. However, it should be understood that these physical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these physical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0009] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0010] exist Figure 1 A new energy vehicle braking system control device is provided, which comprises a brake valve 1, wherein the brake valve 1 is connected to an air reservoir 1 3 and an air reservoir 2 9 through pipelines, the brake valve 1 is connected to a control device 6 through lines, the control device 6 is connected to an electric air compressor 8, an electric-controlled dryer 7, a rear axle pressure sensor 4 and a front axle pressure sensor 5 through lines, the rear axle pressure sensor 4 and the front axle pressure sensor 5 are respectively installed on the air reservoir 1 3 and the air reservoir 2 9, the electric air compressor 8 is connected to the electric-controlled dryer 7 through a pipeline, the electric-controlled dryer 7 is connected to the air reservoir 1 3 and the air reservoir 2 9 through a pipeline via a four-circuit protection valve 10, and a brake switch 2 is provided on the brake valve 1, and the brake switch 2 is connected to the control device 6 through lines.

[0011] The utility model receives the signals of the rear axle pressure sensor 4 and the front axle pressure sensor 5 through the control device 6, and reads the working status of the electric air compressor 8. The brake switch 2, the electronically controlled dryer 7 and the electric air compressor 8 are controlled by the signal difference between the rear axle pressure sensor 4 and the front axle pressure sensor 5. When the pressure of the rear axle pressure sensor 4 and the front axle pressure sensor 5 is abnormal, the start and stop of the electric air compressor 8 is controlled by the control device 6 to avoid damage to the electric air compressor 8, thereby effectively extending the service life of the electric air compressor 8.

[0012] The utility model also includes the following working states:

[0013] The first step is to open the internal unloading valve of the electronically controlled dryer 7 when the vehicle key is turned to the ON position, to eliminate the pipeline pressure and reduce the resistance when the electric air compressor 8 is started.

[0014] In the second step, the control device 6 detects the pressure signals of the rear axle pressure sensor 4 and the front axle pressure sensor 5. When one of the pressures of the two sensors is less than 6.5 bar, the control device 6 starts to send an enable signal to the electric air compressor 8. At the same time, the control device 6 starts timing. When the signal values ​​of the rear axle pressure sensor 4 and the front axle pressure sensor 5 both reach 8.5 bar, the control device 6 delays for 5 seconds and stops sending signals, and the electric air compressor 8 stops working.

[0015] In the third step, when the timing of the control device 6 reaches t=t0 3min, the pressure signals of the rear axle pressure sensor 4 and the front axle pressure sensor 5 have not reached 8.5bar. At this time, the pressure value of the rear axle pressure sensor 4 or the front axle pressure sensor 5 is ≥8.5bar, and the pressure value of the other sensor is ≥8bar. The control device 6 sends the fault information to the vehicle instrument through the CAN line, and the vehicle instrument feeds back to the driver through the fault alarm. The electric air compressor 8 stops working, and the technical t of the control device 6 returns to zero.

[0016] Step 4. When the timing of the control device 6 reaches t=t0 3min, the pressure signals of the rear axle pressure sensor 4 and the front axle pressure sensor 5 have not reached 8.5bar. At this time, the pressure value of the rear axle pressure sensor 4 or the front axle pressure sensor 5 is ≥8bar, and the pressure value of the other sensor is ≥6.5bar and <8bar. The control device 6 sends a fault message to the vehicle instrument through the CAN line, and the vehicle instrument feeds back to the driver through a fault alarm. The electric air compressor 8 stops working, and the start cycle mode is entered when the brake switch 1 is high and effective.

[0017] Step 5. When the timing of the control device 6 reaches t=t0 3min, the pressure signals of the rear axle pressure sensor 4 and the front axle pressure sensor 5 have not reached 8.5bar. At this time, the pressure values ​​of the rear axle pressure sensor 4 and the front axle pressure sensor 5 are less than 8bar. The control device 6 sends a fault message to the instrument 9 through the CAN line. The instrument 9 feeds back the fault alarm to the driver. The electric air compressor 8 does not stop working. When the signal values ​​of the rear axle pressure sensor 4 and the front axle pressure sensor 5 both reach 8.5bar, the control device 6 delays for 5s, stops sending the enable signal, and the electric air compressor 8 stops working.

[0018] In the description of the present invention, it should be understood that the terms "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "inside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new energy vehicle brake system control device, comprising a brake valve (1), wherein the brake valve (1) is connected to a first air reservoir (3) and a second air reservoir (9) through pipelines, and characterized in that: The brake valve (1) is connected to a control device (6) through a line. The control device (6) is connected to an electric air compressor (8), an electric control dryer (7), a rear axle pressure sensor (4) and a front axle pressure sensor (5) through lines. The rear axle pressure sensor (4) and the front axle pressure sensor (5) are respectively installed on a first air reservoir (3) and a second air reservoir (9). The electric air compressor (8) is connected to the electric control dryer (7) through a pipeline. The electric control dryer (7) is respectively connected to the first air reservoir (3) and the second air reservoir (9) through a pipeline via a four-circuit protection valve (10). A brake switch (2) is provided on the brake valve (1). The brake switch (2) is connected to the control device (6) through a line.

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