Integrated electronic parking system and parking method for multi-axle vehicle

Abstract

The present invention discloses an integrated electronic parking system for multi-axle vehicles, comprising a parking controller and an emergency release controller, wherein the parking controller is connected to a vehicle CAN bus, an EPB switch and a parking drive motor of each axle, and the emergency release controller is connected to an emergency release switch and a parking drive motor of each axle; the parking controller comprises a plurality of power control modules, each power control module controls two pre-drive modules, each pre-drive module controls the parking drive motors on two different axles, thereby realizing cross-control of the parking motors of each axle; the emergency release controller comprises a plurality of relay modules, each relay module controls the parking drive motors on two different axles; the parking controller integrates a plurality of control modules, which independently implement cross-control of a plurality of parking brake motors of a plurality of axles, allowing each axle of the vehicle to participate in parking at the same time, realizing multi-axle coordinated action, and realizing emergency release of parking through the emergency release controller, thereby ensuring normal driving of the vehicle.

Description

Technical Field

[0001] The present invention belongs to the field of automotive electronic control technology, and more specifically, relates to an integrated circuit for multi-axle vehicles.

[0002] An electronic parking system and a parking method thereof. Background Art

[0003] Intelligent and electrified systems are making electronic parking brakes increasingly popular in vehicles. For vehicles with two or more axles, pneumatic systems are often used, requiring an air source, air tank, and piping, hindering vehicle weight reduction and layout. Summary of the Invention

[0004] In view of the above defects or improvement needs of the prior art, the present invention aims to solve the problem that the electronic parking solutions for vehicles with two or more axles in the prior art mostly adopt a pneumatic electronic parking solution, which is not conducive to vehicle weight reduction and layout.

[0005] To achieve the above objectives, according to one aspect of the present invention, an integrated electronic parking system for a multi-axle vehicle is provided, comprising a parking controller and an emergency release controller. The parking controller is connected to the vehicle CAN bus, an EPB switch, and the parking drive motors of each axle. The emergency release controller is connected to an emergency release button R and the parking drive motors of each axle.

[0006] The parking controller includes multiple power control modules, each power control module controls two pre-drive modules, and each pre-drive module controls parking drive motors on two different axes, thereby achieving cross control of the parking motors on each axis.

[0007] The emergency release controller includes a plurality of relay modules, each of which controls parking drive motors on two different shafts.

[0008] Furthermore, there are four power control modules, namely power control module P1, power control module P2, power control module P3 and power control module P4; the pre-drive module M1 and pre-drive module M2 controlled by the power control module P1 control the I-axis parking motor G1 and the II-axis parking motor G3, respectively; the pre-drive module M5 and pre-drive module M6 controlled by the power control module P2 control the III-axis parking motor G5 and the IV-axis parking motor G7, respectively; the pre-drive module M3 and pre-drive module M4 controlled by the power control module P3 control the I-axis parking motor G2 and the II-axis parking motor G4, respectively; the pre-drive module M7 and pre-drive module M8 controlled by the power control module P4 control the III-axis parking motor G6 and the IV-axis parking motor G8, respectively.

[0009] Furthermore, there are four relay modules, namely relay module K1, relay module K2, relay module K3 and relay module K4; relay module K1 controls the I-axis parking motor G2 and the II-axis parking motor G4; relay module K2 controls the III-axis parking motor G6 and the IV-axis parking motor G8 respectively; relay module K3 controls the I-axis parking motor G1 and the II-axis parking motor G3 respectively; relay module K4 controls the III-axis parking motor G5 and the IV-axis parking motor G7 respectively.

[0010] Furthermore, in the integrated electronic parking system for multi-axle vehicles, when the parking controller 1 partially or completely fails, the emergency release button R is pressed, and the relay module can control the vehicle power supply to directly power the parking motors G1-G8 to achieve emergency release of parking; after the emergency release, pulling up or releasing the EPB switch will not affect the normal pulling up and releasing functions of the remaining normal modules in the parking controller 1.

[0011] Furthermore, the relay module adopts a relay model TD228C-1001PY.

[0012] Furthermore, the power control module adopts a power controller with model number 16TSSOP-A6861.

[0013] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0014] 1. The electronic parking system of this invention integrates multiple control modules within the parking controller, independently and cross-controlling multiple parking brake motors on multiple axes. This allows each axle to participate in parking simultaneously, achieving coordinated multi-axis motion. This system also addresses the increased failure probability associated with an excessive number of motors and prevents driving difficulties caused by failure of individual electronic components.

[0015] 2. The electronic parking system of the present invention is equipped with an emergency release controller in addition to the parking controller. When the parking controller fails partially or completely, the one-touch release button can be operated to realize emergency release of parking through the emergency release controller, ensuring normal driving of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of the structure of a multi-axis electronic parking system according to a preferred embodiment of the present invention (R in the figure is an emergency

[0017] Release button);

[0018] FIG2 is a control flow diagram of a parking controller according to a preferred embodiment of the present invention;

[0019] FIG3 is a flow chart of an emergency release controller according to a preferred embodiment of the present invention;

[0020] FIG4 is a schematic circuit diagram of a multi-axis electronic parking controller according to a preferred embodiment of the present invention;

[0021] FIG5 is a circuit diagram of an emergency release control circuit according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is 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 intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0023] Referring to Figure 1, an integrated electronic parking system for a multi-axle vehicle includes a parking controller 1 and an emergency release controller 2. The parking controller 1 is connected to the vehicle CAN bus, the EPB switch, and the parking drive motors of each axle. The emergency release controller 2 is connected to the emergency release button R and the parking drive motors of each axle.

[0024] There are four power control modules, namely power control module P1, power control module P2, power control module P3 and power control module P4; specifically, the power controller of STMicroelectronics model 16TSSOP-A6861 can be used, the pre-driver module M1 and pre-driver module M2 controlled by the power control module P1 respectively control the I-axis parking motor G1 and the II-axis parking motor G3; the pre-driver module M5 and pre-driver module M6 controlled by the power control module P2 respectively control the III-axis parking motor G5 and the IV-axis parking motor G7; the pre-driver module M3 and pre-driver module M4 controlled by the power control module P3 respectively control the I-axis parking motor G2 and the II-axis parking motor G4; the pre-driver module M7 and pre-driver module M8 controlled by the power control module P4 respectively control the III-axis parking motor G6 and the IV-axis parking motor G8; in practice, the MCU main control chip can be used through SPI The interface is bidirectionally connected to the MOS motor drive circuit and controls the parking motor of each axis through a bridge circuit.

[0025] The above solution ensures that the failure of any power control module will not cause the simultaneous failure of both motors on one axle, thus preventing the loss of parking brake force on the entire axle. Furthermore, the failure of any power module P will not affect the normal operation of other power modules. The failure of any pre-drive module M will not affect the normal operation of other drive modules. For example, both pre-drive module M2 and pre-drive module M3 can control the parking motor on axle I. The failure of either pre-drive module M2 or pre-drive module M3 will not result in the overall failure of the parking function on axle I, thereby achieving safer cross-control. The parking controller 1 can be modularly matched according to the actual number of axles in the vehicle. If it is a two-axle vehicle, the P3 and P4 power modules are correspondingly turned off. If it is a three-axle vehicle, the P4 module can be turned off.

[0026] There are four relay modules, namely relay module K1, relay module K2, relay module K3 and relay module K4; specifically, the relay model TD228C-1001PY can be used. Relay module K1 controls the I-axis parking motor G2 and the II-axis parking motor G4; relay module K2 controls the III-axis parking motor G6 and the IV-axis parking motor G8 respectively; relay module K3 controls the I-axis parking motor G1 and the II-axis parking motor G3 respectively; relay module K4 controls the III-axis parking motor G5 and the IV-axis parking motor G7 respectively.

[0027] When the parking controller 1 partially or completely fails, pressing the emergency release button R will cause the relay module K to control the vehicle power supply to directly power the parking motors G1-G8, achieving emergency release of the parking system. After the emergency release, pulling up or releasing the EPB switch will not affect the normal pulling up and releasing functions of the remaining normal modules in the parking controller 1.

[0028] Referring to Figure 2, the parking method of the integrated electronic parking system for multi-axle vehicles is as follows: When the vehicle is stopped, when the driver presses the EPB switch, issuing a parking / release request, parking controller 1 receives the parking signal, collects other vehicle status signals on the bus, performs judgment and calculation, and then issues instructions to four power modules (P1, P2, P3, and P4). Based on the received information, the power modules control the operating current and operation time of the corresponding pre-drive modules, actuating the parking motor to achieve parking.

[0029] Please refer to Figures 3 and 4. When the parking controller 1 fails and cannot control the parking motor, the parking brake cannot be released, and the vehicle cannot be driven, the driver can press the emergency release button R. The four relay modules are energized at the same time, directly inputting reverse voltage to the parking motor, thereby reversing the motor and releasing the parking brake. After the power-on time reaches the delay time, the relay module is de-energized and the vehicle remains in the released parking state. At this time, the vehicle can be driven to a maintenance station for repair. If only some power modules or pre-drive modules in the parking controller 1 fail, at this time, at least one power module and its corresponding pre-drive module in the parking controller 1 need to work normally. The vehicle still has a certain parking brake capability. By depressing the EPB switch, the parking controller 1 can still control the partial parking brake function to ensure the safety of the vehicle and personnel.

[0030] The present invention fills the technical gap of using an integrated motor EPB (electronic parking brake system) for two-axle and multi-axle vehicles.

[0031] In the description of the present invention, it should be understood that the terms "first," "second," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance or implicitly specify the quantity of the technical features being referred to. Thus, a feature specified with a quantity such as "first," "second," etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0032] It will be easily understood by those skilled in the art that 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 integrated electronic parking system for a multi-axle vehicle, characterized by: It comprises a parking controller (1) and an emergency release controller (2), wherein the parking controller (1) is connected to the vehicle CAN bus, the EPB switch and the parking drive motors of each axle, and the emergency release controller (2) is connected to the emergency release button R and the parking drive motors of each axle; The parking controller (1) comprises a plurality of power supply control modules, each power supply control module controls two pre-drive modules, and each pre-drive module controls parking drive motors on two different axes, thereby achieving cross control of the parking motors on each axis; The emergency release controller (2) includes a plurality of relay modules, each relay module controls the parking drive motors on two different axes, and there are four power control modules, namely, power control module P1, power control module P2, power control module P3 and power control module P4; the pre-drive module M1 and pre-drive module M2 controlled by the power control module P1 respectively control the parking motor G1 of axis I and the parking motor G3 of axis II; the pre-drive module M5 and pre-drive module M6 controlled by the power control module P2 respectively control the parking motor G5 of axis III and the parking motor G4 of axis IV Axis parking motor G7; the pre-drive module M3 and pre-drive module M4 controlled by the power control module P3 respectively control the I-axis parking motor G2 and the II-axis parking motor G4; the pre-drive module M7 and pre-drive module M8 controlled by the power control module P4 respectively control the III-axis parking motor G6 and the IV-axis parking motor G8; when the parking controller (1) partially fails or completely fails, the emergency release button R is pressed, and the relay module controls the vehicle power supply to directly supply power to the parking motors G1-G8, thereby realizing emergency release of parking; after the emergency release, the EPB switch is pulled up or released without affecting the normal pulling up and releasing of the remaining normal modules in the parking controller (1); There are four relay modules, namely relay module K1, relay module K2, relay module K3 and relay module K4; relay module K1 controls the I-axis parking motor G2 and the II-axis parking motor G4; relay module K2 controls the III-axis parking motor G6 and the IV-axis parking motor G8 respectively; relay module K3 controls the I-axis parking motor G1 and the II-axis parking motor G3 respectively; relay module K4 controls the III-axis parking motor G5 and the IV-axis parking motor G7 respectively.

2. The integrated electronic parking system for a multi-axle vehicle according to claim 1, characterized in that: The relay module adopts a relay with model TD228C-1001PY.

3. The integrated electronic parking system for a multi-axle vehicle according to claim 1, characterized in that: The power control module adopts a power controller with the model number of 16TSSOP-A6861.

4. The parking method of the integrated electronic parking system for a multi-axle vehicle according to claim 1, characterized in that: When the vehicle stops, when the driver presses the EPB switch and issues a parking / release request, the parking controller (1) receives the parking signal, collects other vehicle status signals on the bus, performs judgment and calculation, and then issues instructions to multiple power control modules; The power module controls the operating current and operating time of the corresponding pre-drive module according to the received information, and activates the parking motor to achieve parking. When the parking controller (1) fails and cannot control the parking motor, the parking brake cannot be released, and the vehicle cannot be driven, the driver presses the emergency release button R, and multiple relay modules are energized at the same time, directly inputting reverse voltage to the parking motor, thereby causing the motor to reverse and the parking brake to be released; after the power-on time reaches the delay time, the relay module is de-energized, and the vehicle remains in the released parking state. At this time, the vehicle can be driven to a maintenance station for maintenance.

5. The parking method of the integrated electronic parking system for a multi-axle vehicle according to claim 4, characterized in that: If only part of the power modules or pre-drive modules of the parking controller (1) fail, at this time, as long as at least one group of power modules and its corresponding pre-drive modules in the parking controller (1) can work normally, the vehicle still has a certain parking brake capability, and the parking controller (1) can still realize a partial parking brake function by depressing the EPB switch, thereby ensuring the safety of the vehicle and personnel.

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