Parking control method for mechanical parking commercial vehicle

Abstract

The invention discloses a parking control method for a mechanical parking commercial vehicle, and relates to the technical field of parking of commercial vehicles, and the parking control method comprises the following steps: judging whether the vehicle is in a parking state or not; when the vehicle is in the parking state, the vehicle body controller is controlled to detect a parking signal; if the hand brake signal is not switched on, the safety belt signal is not switched on, the brake pedal signal is not switched on, and the vehicle speed is smaller than the preset vehicle speed value, an output signal used for representing that a hand brake is not pulled is output; and if the hand brake signal is not switched on all the time after the output signal used for representing that the hand brake is not pulled is continuously output for the preset duration, the vehicle is controlled to start the automatic parking function. For a commercial vehicle provided with a mechanical hand brake, whether the driver has the risk of getting off the vehicle without pulling up the parking vehicle or not is accurately judged, an alarm is given to the driver in time, potential safety hazards are reduced, and if the driver still does not pull up the hand brake, the automatic parking function is started to achieve automatic parking, and the risk of vehicle sliding after parking is thoroughly avoided. And the safety and the intelligent degree of the vehicle are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of commercial vehicle parking, and in particular to a parking control method for a mechanically parked commercial vehicle. Background Art

[0002] For the mechanical parking brake device used in commercial vehicles, sometimes due to the driver's negligence, he occasionally forgets to pull the handbrake after parking, causing the car to slide backwards and causing serious traffic accidents. Summary of the invention

[0003] The present application provides a parking control method for a mechanically parked commercial vehicle to at least solve at least one technical problem existing in the related art.

[0004] The present application provides a parking control method for a mechanical parking commercial vehicle, comprising:

[0005] Determine whether the vehicle is in a parking state;

[0006] When the vehicle is in a parking state, the body controller is controlled to detect a parking signal;

[0007] If the handbrake signal is not connected, the seat belt signal is not connected, the brake pedal signal is not connected, and the vehicle speed is less than the preset vehicle speed value, an output signal is output to indicate that the handbrake is not pulled;

[0008] If the handbrake signal is still not connected after the preset time period of outputting the output signal for indicating that the handbrake is not pulled, the vehicle is controlled to start the automatic parking function.

[0009] As an optional implementation, if the output signal for characterizing that the handbrake is not applied is continuously output for a preset time period, the handbrake signal is turned on, and / or the seat belt signal is turned on, and / or the brake pedal signal is turned on, and / or the vehicle speed is greater than the preset vehicle speed value, the output of the output signal for characterizing that the handbrake is not applied is stopped.

[0010] As an optional implementation, the automatic parking function includes: an air brake type automatic parking function and a liquid brake type automatic parking function.

[0011] As an optional implementation, the air brake type automatic parking system includes an air storage chamber for storing gas and a solenoid valve for controlling compressed gas to enter the driving chamber, and the solenoid valve is connected to the body controller; controlling the vehicle to start the air brake type automatic parking function includes: the body controller controls the solenoid valve to open the air inlet valve, close the air outlet valve, and control the compressed air to enter the driving chamber; the compressed gas pushes the push rod of the driving chamber air chamber to push the brake for braking.

[0012] As an optional implementation, if the vehicle is controlled to turn off the air brake type automatic parking function, the body controller controls the solenoid valve to close the air inlet valve, open the air outlet valve, and control the compressed air to enter the air storage chamber.

[0013] As an optional embodiment, the hydraulic brake type automatic parking system includes: a liquid storage device, a one-way valve connected to the liquid storage device, a one-position three-way solenoid valve arranged in parallel with the one-way valve, an energy accumulator and a two-position two-way solenoid valve connected in sequence to the one-way valve, and a brake connected to the two-position two-way solenoid valve; the one-position three-way solenoid valve and the two-position two-way solenoid valve are respectively connected to the vehicle body controller.

[0014] As an optional implementation manner, controlling the vehicle to start the hydraulic brake type automatic parking function includes:

[0015] The vehicle body controller controls the one-way valve to close, controls the two-position two-way solenoid valve to connect one side, and controls the one-position three-way solenoid valve to close, so that the brake fluid flows from the accumulator through the two-position two-way solenoid valve and into the brake to perform braking and parking.

[0016] As an optional implementation, if the vehicle is controlled to turn off the liquid brake type automatic parking function, the body controller controls the first-position three-way solenoid valve to be connected, and controls the second-position two-way solenoid valve to be connected to the other side, so that the brake fluid flows from the brake through the second-position two-way solenoid valve, the accumulator, the first-position three-way solenoid valve, and into the fluid storage device.

[0017] As an optional embodiment, when the opening of the brake pedal changes, the one-position three-way solenoid valve is in a power-off state, and the brake fluid flows from the fluid storage device through the one-way valve into the energy accumulator; the two-position two-way solenoid valve is connected to the other side, so that the brake fluid can only flow from the brake through the two-position two-way solenoid valve into the energy accumulator.

[0018] In an embodiment of the present application, a parking control method for a mechanical parking commercial vehicle is provided, including: determining whether the vehicle is in a parking state; when the vehicle is in a parking state, controlling the body controller to detect a parking signal; if the handbrake signal is not connected, the seat belt signal is not connected, the brake pedal signal is not connected, and the vehicle speed is less than a preset vehicle speed value, outputting an output signal for indicating that the handbrake is not pulled; if the handbrake signal is not connected after the preset time period of the output signal for indicating that the handbrake is not pulled, the vehicle is controlled to start the automatic parking function. For commercial vehicles equipped with mechanical handbrakes, under the premise of a small increase in the cost of the whole vehicle, the seat belt signal, the parking handle signal, the brake pedal signal, the vehicle speed signal, the pressure signal, etc. are selected to accurately determine whether the driver has the risk of getting off the vehicle without pulling the parking brake, and the driver is promptly alarmed to reduce safety hazards. If the driver still does not pull up the handbrake, the automatic parking function is started to achieve automatic parking, and the risk of slipping after parking is completely avoided. The safety and intelligence of the vehicle are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 It is a flow chart of a parking control method for a mechanically parked commercial vehicle provided according to an embodiment of the present application.

[0022] Figure 2 It is a schematic diagram of the structure of a hydraulic brake type automatic parking system provided according to an embodiment of the present application.

[0023] Reference numerals

[0024] 1. Liquid storage device; 2. One-way valve; 3. One-position three-way solenoid valve; 4. Energy accumulator; 5. Two-position two-way solenoid valve; 6. Brake. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] like Figure 1 As shown, the embodiment of the present application provides a parking control method for a mechanical parking commercial vehicle, comprising:

[0028] S1 determines whether the vehicle is in a parking state;

[0029] S2 controls the body controller to detect the parking signal when the vehicle is in a parking state;

[0030] S3: if the handbrake signal is not connected, the seat belt signal is not connected, the brake pedal signal is not connected, and the vehicle speed is less than the preset vehicle speed value, output an output signal for indicating that the handbrake is not pulled;

[0031] S4: if the handbrake signal is still not connected after the preset time period of outputting the output signal for indicating that the handbrake is not pulled, the vehicle is controlled to start the automatic parking function.

[0032] For commercial vehicles equipped with mechanical handbrakes, under the premise of very little increase in vehicle cost, seat belt signals, parking handle signals, brake pedal signals, vehicle speed signals, pressure signals, etc. are selected to accurately determine whether the driver has the risk of getting off the vehicle without pulling the parking brake, and the driver is promptly alerted to reduce safety hazards. If the driver still does not pull up the handbrake, the automatic parking function is activated to achieve automatic parking, completely avoiding the risk of the vehicle slipping after parking. The safety and intelligence of the vehicle are improved. Among them, the output signal used to characterize that the handbrake is not pulled can be a sound broadcast, an alarm sound, or text or animation, etc., which is not limited in this application; the preset time length can be 1s, 2s, etc., which is also not limited in this application.

[0033] Specifically, when the vehicle driven by the driver stops, the BCM starts to detect relevant signals. When it detects that the handbrake is not pulled, the seat belt is not fastened, the brake pedal is not pressed, and the vehicle speed signal is less than 3km / h (that is, the preset vehicle speed value, 3km / h is only an example value, and the actual value can be set according to actual conditions), if these four conditions are met at the same time, the "parking not pulled" alarm will be triggered; if any one of these four conditions is not met, the "parking not pulled" alarm will not be triggered.

[0034] In addition, it is also possible to determine whether there is a fault in the body controller (BCM), an internal fault in the BCM, and when the BCM enters the limp home mode, an output signal is output to indicate that the handbrake is not pulled, and automatic parking is started.

[0035] As an optional implementation, if the output signal for characterizing that the handbrake is not applied is continuously output for a preset time period, the handbrake signal is turned on, and / or the seat belt signal is turned on, and / or the brake pedal signal is turned on, and / or the vehicle speed is greater than the preset vehicle speed value, the output of the output signal for characterizing that the handbrake is not applied is stopped.

[0036] As an optional implementation, the automatic parking function includes: an air brake type automatic parking function and a liquid brake type automatic parking function.

[0037] As an optional embodiment, the air brake type automatic parking system includes an air storage chamber for storing gas and a solenoid valve for controlling compressed gas to enter the driving chamber, and the solenoid valve is connected to the body controller; controlling the vehicle to start the air brake type automatic parking function includes: the body controller controls the solenoid valve to open the air inlet valve, close the air outlet valve, and control the compressed air to enter the driving chamber; the compressed gas pushes the push rod of the driving chamber air chamber to push the brake 6 for braking.

[0038] Specifically, BCM sends an electrical signal to draw the solenoid valve, the solenoid valve intake valve opens, the exhaust valve closes, and the compressed gas enters the driving cavity of the air chamber. Under the action of the compressed gas, the push rod of the air chamber pushes the brake 6 for braking.

[0039] As an optional implementation, if the vehicle is controlled to turn off the air brake type automatic parking function, the body controller controls the solenoid valve to close the air inlet valve, open the air outlet valve, and control the compressed air to enter the air storage chamber.

[0040] As an optional embodiment, the hydraulic brake type automatic parking system includes: a liquid storage device 1, a one-way valve 2 connected to the liquid storage device 1, a one-position three-way solenoid valve 3 arranged in parallel with the one-way valve 2, an accumulator 4 and a two-position two-way solenoid valve 5 connected in sequence to the one-way valve 2, and a brake 6 connected to the two-position two-way solenoid valve 5; the one-position three-way solenoid valve 3 and the two-position two-way solenoid valve 5 are respectively connected to the vehicle body controller.

[0041] like Figure 2 As shown, the automatic parking system of the liquid brake type includes: a liquid storage device 1, a one-way valve 2 connected to the liquid storage device 1, a one-position three-way solenoid valve 3 arranged in parallel with the one-way valve 2, an accumulator 4 and a two-position two-way solenoid valve 5 connected in sequence to the one-way valve 2, and a brake 6 connected to the two-position two-way solenoid valve 5; the one-position three-way solenoid valve 3 and the two-position two-way solenoid valve 5 are respectively connected to the vehicle body controller. When the two-position two-way solenoid valve 5 is in the right position, the oil can only flow from the brake 6 to the accumulator 4, and when the two-position two-way solenoid valve 5 is in the left position, the oil can only flow from the accumulator 4 to the brake 6; the one-way valve 2 can only make the oil flow from the liquid storage device 1 to the accumulator 4; when the one-position three-way solenoid valve 3 is connected, the oil flows from the accumulator 4 to the liquid storage device 1.

[0042] As an optional implementation, controlling the vehicle to start the liquid brake type automatic parking function includes: the body controller controls the one-way valve 2 to close, controls the two-position two-way solenoid valve 5 to connect one side, controls the one-position three-way solenoid valve 3 to close, so that the brake fluid flows from the accumulator 4 through the two-position two-way solenoid valve 5 and flows into the brake 6 to perform brake parking.

[0043] BCM sends an electrical signal to the two-position two-way solenoid valve 5, and the one-position three-way solenoid valve 3 is still in the power-off and flow-cutting state, controlling the two-position two-way solenoid valve 5 to be in the left working position, and the high-pressure brake fluid will flow to the brake 6.

[0044] As an optional implementation, if the vehicle is controlled to turn off the liquid brake type automatic parking function, the body controller controls the first-position three-way solenoid valve 3 to be connected, and controls the second-position two-way solenoid valve 5 to be connected to the other side, so that the brake fluid flows from the brake 6 through the second-position two-way solenoid valve 5, the accumulator 4, the first-position three-way solenoid valve 3, and flows into the liquid storage device 1.

[0045] BCM sends an electrical signal to the first-position three-way solenoid valve 3, and at the same time, the second-position two-way solenoid valve 5 is powered off. The high-pressure brake fluid will pass through the right position of the two-position two-way solenoid valve 5, and the first-position three-way solenoid valve 3 is connected. The high-pressure brake fluid flows back to the fluid storage device 1, and the brakes are released, allowing the driver to drive normally.

[0046] As an optional embodiment, when the opening of the brake pedal changes, the first-position three-way solenoid valve 3 is in a power-off state, and the brake fluid flows from the fluid storage device 1 through the one-way valve 2 into the energy accumulator 4; the second-position two-way solenoid valve 5 is connected to the other side, so that the brake fluid can only flow from the brake 6 through the second-position two-way solenoid valve 5 into the energy accumulator 4.

[0047] That is, every time the driver steps on the brake pedal, the brake fluid flows from the liquid storage device 1 through the one-way valve 2 into the accumulator 4, and the hydraulic energy is replenished in the accumulator through the one-way valve 2. At this time, the first-position three-way solenoid valve 3 is in a power-off state, and the valve port is closed. The second-position two-way solenoid valve 5 is in the right position, and the oil can only flow from the brake 6 to the accumulator, so that the hydraulic energy can be retained in the accumulator to prepare for automatic parking when the handbrake is not pulled. At the same time, a pressure sensor is also provided to monitor the hydraulic pressure in the accumulator 4 in real time. If the pressure is abnormal every time the brake pedal is stepped on, it can be used for fault alarm of this device system.

[0048] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0049] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling one or more electronic devices (such as personal computers, servers, or network devices) to perform all or part of the steps of the methods described in the various embodiments of the present application.

[0050] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0051] In the several embodiments provided in the present application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0052] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution provided in this embodiment.

[0053] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0054] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0055] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A parking control method for a mechanically parked commercial vehicle, It is characterized in that include: Determine whether the vehicle is in a parking state; When the vehicle is in a parking state, the body controller is controlled to detect a parking signal; If the handbrake signal is not connected, the seat belt signal is not connected, the brake pedal signal is not connected, and the vehicle speed is less than the preset vehicle speed value, an output signal is output to indicate that the handbrake is not pulled; If the handbrake signal is still not connected after the preset time period of outputting the output signal for indicating that the handbrake is not pulled, the vehicle is controlled to start the automatic parking function.

2. The parking control method for a mechanically parked commercial vehicle according to claim 1, It is characterized in that If the output signal for representing that the handbrake is not applied is continuously output for a preset time period, the handbrake signal is turned on, and / or the seat belt signal is turned on, and / or the brake pedal signal is turned on, and / or the vehicle speed is greater than the preset vehicle speed value, stop outputting the output signal for representing that the handbrake is not applied.

3. The parking control method for a mechanically parked commercial vehicle according to claim 2, It is characterized in that The automatic parking function includes: an air brake type automatic parking function and a liquid brake type automatic parking function.

4. The parking control method for a mechanically parked commercial vehicle according to claim 3, It is characterized in that The air brake type automatic parking system includes an air storage chamber for storing gas and a solenoid valve for controlling compressed gas to enter the driving chamber, and the solenoid valve is connected to the vehicle body controller; controlling the vehicle to start the air brake type automatic parking function includes: The vehicle body controller controls the solenoid valve to open the air inlet valve and close the air outlet valve, thereby controlling the compressed air to enter the driving chamber; The compressed gas pushes the push rod of the driving chamber to push the brake for braking.

5. The parking control method for a mechanically parked commercial vehicle according to claim 4, It is characterized in that If the vehicle is controlled to close the air brake type automatic parking function, the body controller controls the solenoid valve to close the air inlet valve and open the air outlet valve to control the compressed air to enter the air storage chamber.

6. The parking control method for a mechanically parked commercial vehicle according to claim 3, It is characterized in that The liquid brake type automatic parking system includes: a liquid storage device, a one-way valve connected to the liquid storage device, a one-position three-way solenoid valve arranged in parallel with the one-way valve, an energy storage device and a two-position two-way solenoid valve connected in sequence to the one-way valve, and a brake connected to the two-position two-way solenoid valve; the one-position three-way solenoid valve and the two-position two-way solenoid valve are respectively connected to the vehicle body controller.

7. The parking control method for a mechanically parked commercial vehicle according to claim 6, It is characterized in that Controlling the vehicle to start the hydraulic brake type automatic parking function includes: The vehicle body controller controls the one-way valve to close, controls the two-position two-way solenoid valve to connect one side, and controls the one-position three-way solenoid valve to close, so that the brake fluid flows from the accumulator through the two-position two-way solenoid valve and into the brake to perform braking and parking.

8. The parking control method for a mechanically parked commercial vehicle according to claim 7, It is characterized in that If the vehicle is controlled to turn off the liquid brake type automatic parking function, the body controller controls the first-position three-way solenoid valve to be connected, and controls the second-position two-way solenoid valve to be connected to the other side, so that the brake fluid flows from the brake through the second-position two-way solenoid valve, the accumulator, the first-position three-way solenoid valve, and flows into the liquid storage device.

9. The parking control method for a mechanically parked commercial vehicle according to claim 7, It is characterized in that When the opening of the brake pedal changes, the one-position three-way solenoid valve is in a power-off state, and the brake fluid flows from the fluid storage device through the one-way valve into the accumulator; the two-position two-way solenoid valve is connected to the other side, so that the brake fluid can only flow from the brake through the two-position two-way solenoid valve into the accumulator.

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