Power mode switching control method for shunting locomotive

Abstract

The present disclosure provides a method for controlling a power mode switching system of a shunting locomotive. The power mode control system includes: an onboard display screen, a power mode switching button, and a central control unit. The power mode switching button is set on the onboard display screen, and the onboard display screen is connected to the central control unit. When the shunting locomotive is in a non-loaded state, the power mode switching steps are as follows: Step 1, powering on the power mode control system; Step 2, establishing communication between the onboard display screen and the central control unit; Step 3, capturing the power mode switching button in real time; Step 4, pressing the captured power mode switching button to be selected; Step 5, the display screen sends the selected power mode signal to the central control unit, and the control unit switches the power mode of the shunting locomotive to the selected power mode. The present disclosure switches between different power modes of the locomotive directly through the operation of clicking on the locomotive display screen, simplifying the operation procedure.

Description

Technical Field

[0001] The present disclosure relates to the technical field of shunting locomotives, and in particular to a power mode switching control method for a shunting locomotive. Background Art

[0002] In response to the national "carbon neutrality" development strategy and guided by the development needs of "green, energy-saving, and noise reduction," upgrading pure diesel shunting locomotives to hybrid electric shunting locomotives will be a crucial step. The use of hybrid electric shunting locomotives can significantly improve fuel economy and reduce emissions compared to existing pure diesel vehicles. It can also effectively reduce overall vehicle system noise, making it a key measure for achieving energy conservation and emission reduction.

[0003] During operation, a hybrid shunting locomotive can adopt one of three power modes: hybrid, diesel engine, and power battery, as needed. Therefore, the three power modes need to be switched and controlled. However, if the power mode of the hybrid shunting locomotive cannot be switched manually, the operating requirements of each subsystem will be unclear. At the same time, when a shunting locomotive fails, the troubleshooting will be cumbersome, and testing will not be possible in pure diesel engine power or pure power battery power mode.

[0004] In the prior art, a system and method for automatically switching the driving mode of a hybrid vehicle (CN114212073A) proposes that a hybrid shunting locomotive is in hybrid mode by default. Regardless of the power mode state of the locomotive, the central control unit collects relevant status such as diesel engine speed, diesel-generator set information and power battery through communication, and sends these status information to each subsystem for vehicle traction, auxiliary and power battery charging and discharging control. However, there are the following problems: in the hybrid mode, if performance testing is required in the diesel engine mode or the power battery mode, it must be achieved by manually modifying the software or disconnecting the electrical circuit breaker, etc. This is often accompanied by the protection logic of the shunting locomotive itself, which is very inconvenient to implement; when the power battery is discharged, when the SOC of the power battery is low enough to require starting the diesel engine for charging, the diesel engine will automatically start to charge the power battery pack. Therefore, it is impossible to actually verify the power battery SOC lower limit protection function, nor can the limit value be calibrated. If its SOC lower limit protection function is to be verified, it can only be achieved by modifying the relevant system software, and it is impossible to verify whether the value is correct; when it is necessary to verify the stability of the diesel engine, the power battery function must be cut off by disconnecting the power battery circuit breaker. In the hybrid mode, the power battery is cut off, which is an abnormal operating condition, and is often accompanied by the unloading protection logic of the shunting locomotive, making it impossible for the shunting locomotive to verify this function alone.

[0005] Based on this, the existing technology still needs to be improved. Summary of the Invention

[0006] To solve the above technical problems, the present disclosure provides a method for controlling power mode switching of a shunting locomotive. The power mode control system includes: an onboard display screen, a power mode switching button, and a central control unit. The power mode switching button is provided on the onboard display screen, and the onboard display screen is connected to the central control unit.

[0007] When the shunting locomotive is in the non-loaded state, the steps for switching the power mode are as follows:

[0008] Step 1: Power on the power mode control system;

[0009] Step 2: The vehicle display screen establishes communication with the central control unit;

[0010] Step 3: Capture the power mode switch button in real time;

[0011] Step 4. Press the power mode switch button you want to select;

[0012] Step 5: The display screen sends the selected power mode signal to the central control unit, and the control unit switches the power mode of the shunting locomotive to the selected power mode.

[0013] Furthermore, the power modes include hybrid mode, diesel engine mode and power battery mode.

[0014] Furthermore, the power mode switching button includes a hybrid button, a diesel engine button and a power battery button.

[0015] Furthermore, the vehicle-mounted display screen is connected to the central control unit via a network bus.

[0016] Furthermore, the display screen sends the selected power mode to the central control unit in a pulse manner through bus communication.

[0017] Furthermore, when switching to hybrid mode,

[0018] Step 3 includes: capturing the hybrid button;

[0019] Step 4 includes: pressing the hybrid button;

[0020] Step 5 includes: the display screen sends a hybrid mode signal to the central control unit, and the control unit switches the power mode of the shunting locomotive to the hybrid mode.

[0021] Furthermore, when switching to diesel engine mode,

[0022] Step 3 includes: capturing the diesel engine key;

[0023] Step 4 includes: pressing the diesel engine button;

[0024] Step 5 includes: the display screen sends a diesel engine mode signal to the central control unit, and the control unit switches the power mode of the shunting locomotive to the diesel engine mode.

[0025] Furthermore, when switching to the power battery mode,

[0026] Step 3 includes: capturing the power battery button;

[0027] Step 4 includes: pressing the power battery button;

[0028] Step 5 includes: the display screen sends a power battery mode signal to the central control unit, and the control unit switches the power mode of the shunting locomotive to the power battery mode.

[0029] Furthermore, after switching to the diesel engine mode, the central control unit bypasses the system in the power battery mode.

[0030] Furthermore, after switching to the power battery mode, the central control unit bypasses the system in the diesel engine mode.

[0031] According to the above technical solution, the present disclosure provides a method for controlling the power mode switching system of a shunting locomotive, which switches between different power modes of the shunting locomotive directly by clicking on the on-board display screen, thereby simplifying the operating procedure. At the same time, the diesel engine mode system and the power battery mode system are tested separately. By testing the two power mode systems separately before the shunting locomotive goes online, the stability of the power system after the shunting locomotive goes online is guaranteed. In addition, if a fault occurs in the diesel engine mode system or the power battery mode system during the operation of the shunting locomotive, switching to another power mode can bypass the faulty power system, ensuring that the shunting locomotive can maintain operation and reducing the risk of line damage to the shunting locomotive. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] Figure 1 This is a flow chart of power mode switching of a shunting locomotive disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following embodiments of the present disclosure are further described in detail with reference to the accompanying drawings and examples. The detailed description of the following examples and the accompanying drawings are intended to illustrate the principles of the present disclosure, but are not intended to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but rather includes all technical solutions within the scope of the claims.

[0035] The present disclosure provides these embodiments in order to make this disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values ​​set forth in these embodiments should be interpreted as merely exemplary, and not as limiting.

[0036] It should be noted that, in the description of this disclosure, unless otherwise specified, "plurality" means greater than or equal to two; terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are intended solely to facilitate and simplify the description of this disclosure, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0037] In addition, the terms "first," "second," and similar terms used in this disclosure do not denote any order, quantity, or importance, but are merely used to distinguish different parts. "Perpendicular" does not mean perpendicular in the strict sense, but rather means within the tolerance range. "Parallel" does not mean parallel in the strict sense, but rather means within the tolerance range. "Include" or "comprising" and similar terms mean that the elements preceding the term include the elements listed after the term, and do not exclude the possibility of also including other elements.

[0038] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this disclosure depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intervening device between the specific device and the first or second device.

[0039] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, common dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or highly formal sense, unless explicitly defined as such herein.

[0040] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0041] like Figure 1 As shown, the present invention discloses a method for controlling a power mode switching system for a shunting locomotive. The power mode control system comprises a central control unit that receives and processes signals and an onboard display screen that displays shunting locomotive information and issues commands. The onboard display screen is provided with a power mode switching button. Specifically, the power modes include hybrid mode, diesel engine mode, and power battery mode. The power mode switching buttons include hybrid mode, diesel engine mode, and power battery mode. The onboard display screen is connected to the central control unit. The operator performs relevant setting operations through the onboard display screen. The onboard display screen captures the corresponding power mode button signal and sends it to the central control unit. In one embodiment, the onboard display screen is connected to the central control unit via a network bus. That is, the onboard display screen captures the corresponding button signal and sends it to the central control unit via the onboard network bus communication. The central control unit collects all status information of the shunting locomotive, integrates the current status of the shunting locomotive, generates corresponding setting targets, or provides reasons for setting failure, thereby realizing the complete human-computer interaction system function.

[0042] Specifically, after the power mode switching system is powered on, the on-board display screen establishes communication with the central control unit and captures the power mode switching button status on the display screen interface in real time. When the selected power mode switching button is captured to be pressed, the on-board display screen sends the selected power mode to the central control unit through bus communication. In one embodiment, the on-board display screen sends the selected power mode to the central control unit in a pulsed manner. After the central control unit receives the corresponding power mode activation signal, when the shunting locomotive is in a non-loading condition, it switches to the selected power mode and sends this power mode to each subsystem.

[0043] like Figure 1As shown, in an embodiment of switching to hybrid mode, after the power mode control system is powered on, when there is no power mode switching demand, the shunting locomotive enters hybrid mode by default. If the shunting locomotive is already in diesel engine mode or power battery mode, the hybrid button can be clicked on the on-board display. When the shunting locomotive is in a non-loading state, the central control unit will switch the shunting locomotive to hybrid mode upon receiving the hybrid mode selection, and send this mode to each locomotive subsystem. At the same time, the on-board display prompts that the hybrid mode is active, and the diesel engine power system and the power battery power system jointly provide energy for locomotive traction and auxiliary. When the shunting locomotive is in a loading state, the power mode cannot be switched. The central control unit will send the reason for the failure to switch to the on-board display, and the operator can directly view the reason for the switch failure through the on-board display.

[0044] like Figure 1 As shown, in an embodiment of switching to diesel engine mode, after the power mode control system is powered on, when it is necessary to enter diesel engine mode, the diesel engine button can be clicked on the on-board display screen. When the shunting locomotive is in a non-loaded state, the central control unit will switch the shunting locomotive to pure diesel engine mode upon receiving the diesel engine mode selection, and send this mode to each locomotive subsystem. The on-board display screen will have a clear prompt that the diesel engine mode is activated. In one embodiment, after switching to diesel engine mode, the central control unit will bypass the power battery system related to the unloading failure of the shunting locomotive, so that the failure of the power battery system will not affect the operation of the locomotive. At this time, the power battery cannot be put into use, and the locomotive relies solely on the diesel engine power system to provide energy for traction and auxiliary. When the shunting locomotive is in a loaded state and the power mode cannot be switched, the central control unit will send the reason for the failure to switch to the on-board display screen, and the operator can directly view the reason for the switching failure through the display screen.

[0045] like Figure 1As shown, in an embodiment of switching to power battery mode, after the power mode control system is powered on, when the need to enter pure power battery mode arises, the power battery button can be selected on the onboard display. When the shunting locomotive is in the unloaded state, the central control unit, upon receiving the power battery mode selection, switches the shunting locomotive to power battery mode and transmits this mode to each shunting locomotive subsystem. The onboard display clearly indicates that power battery mode is activated. In one embodiment, after switching to power battery mode, the central control unit bypasses the diesel engine and the shunting locomotive's main generator system, preventing the failure of the diesel engine and the main generator system from affecting locomotive operation. If the diesel engine is in the running state, the central control unit triggers a diesel engine shutdown signal to shut down the diesel engine, saving fuel. If the diesel engine is in the shutdown state, the diesel engine cannot be started and the shunting locomotive relies solely on the power battery system to provide energy for traction and auxiliary functions. If the shunting locomotive is in the loaded state and the power mode cannot be switched, the central control unit sends the reason for the switch failure to the onboard display, allowing the operator to directly view the reason for the switch failure on the display.

[0046] The present disclosure provides a method for controlling the power mode switching system of a shunting locomotive. This method allows switching between different power modes of the shunting locomotive directly through a point-and-click operation on an onboard display screen, simplifying the operating procedure. Furthermore, the method allows for separate testing of the diesel engine mode system and the power battery mode system. By testing both power mode systems separately before the shunting locomotive goes online, the stability of the power system is ensured after the shunting locomotive goes online. Furthermore, if a fault occurs in either the diesel engine mode system or the power battery mode system during operation of the shunting locomotive, switching to the other power mode bypasses the faulty power system, ensuring the continued operation of the shunting locomotive and reducing the risk of line damage.

[0047] Thus far, various embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details known in the art have not been described. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions disclosed herein.

[0048] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art will understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Those skilled in the art will understand that the above embodiments may be modified or some technical features may be replaced with equivalents without departing from the scope and spirit of the present disclosure. In particular, as long as there are no structural conflicts, the various technical features mentioned in the various embodiments may be combined in any manner.

Claims

1. A power mode switching control method for a shunting locomotive, characterized in that: The power mode control system includes: an on-board display screen, a power mode switching button and a central control unit, wherein the power mode switching button is set on the on-board display screen, and the on-board display screen is connected to the central control unit. When the shunting locomotive is in the non-loaded state, the steps for switching the power mode are as follows: Step 1: Power on the power mode control system; Step 2: The vehicle display screen establishes communication with the central control unit; Step 3: Capture the power mode switching button in real time; Step 4: Press the power mode switch button to be selected; Step 5: The display screen sends the selected power mode signal to the central control unit, and the central control unit switches the power mode of the shunting locomotive to the selected power mode; The power modes include hybrid mode, diesel engine mode and power battery mode; The power mode switching button includes a hybrid button, a diesel engine button and a power battery button; When the shunting locomotive is in the loading state, the power mode cannot be switched; After switching to the diesel engine mode, the central control unit bypasses the system in the power battery mode; After switching to the power battery mode, the central control unit bypasses the system in the diesel engine mode.

2. The power mode switching control method of a shunting locomotive according to claim 1, characterized in that: The vehicle-mounted display screen is connected to the central control unit via a network bus.

3. The power mode switching control method of a shunting locomotive according to claim 2, characterized in that: The display screen sends the selected power mode to the central control unit in a pulse manner through bus communication.

4. The power mode switching control method for a shunting locomotive according to claim 3, characterized in that: When switching to the hybrid mode, The step 3 includes: capturing the hybrid button; The step 4 includes: pressing the hybrid button; The step 5 includes: the display screen sends the hybrid mode signal to the central control unit, and the central control unit switches the power mode of the shunting locomotive to the hybrid mode.

5. The power mode switching control method for a shunting locomotive according to claim 4, characterized in that: When switching to the diesel engine mode, The step 3 includes: capturing the diesel engine button; The step 4 includes: pressing the diesel engine button; The step 5 includes: the display screen sends the diesel engine mode signal to the central control unit, and the central control unit switches the power mode of the shunting locomotive to the diesel engine mode.

6. The power mode switching control method for a shunting locomotive according to claim 5, characterized in that: When switching to the power battery mode, The step 3 includes: capturing the power battery button; The step 4 includes: pressing the power battery button; The step 5 includes: the display screen sends the power battery mode signal to the central control unit, and the central control unit switches the power mode of the shunting locomotive to the power battery mode.

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