Control method for automatic start-stop heat preservation of unmanned monitoring diesel engine

Abstract

The invention discloses an unmanned monitoring diesel engine automatic start-stop heat preservation control method which comprises the following steps that S1, a control system judges the starting condition of an automatic start-stop mode, and if the condition is met, a locomotive is controlled to start to execute the automatic start-stop mode; s2, the control system detects technical parameter conditions, if all the technical parameters are met, the diesel engine is shut down or maintains a shut-down state, if any one of the technical parameters is not met, the diesel engine is automatically started or maintains a starting state, and the diesel engine is shut down again until all the technical parameters are met; and S3, executing mode exit operation on the locomotive, and controlling the locomotive to exit from the automatic start-stop mode. According to the invention, on the basis that no extra equipment is additionally arranged on the locomotive, multiple targets such as omnibearing monitoring of the whole locomotive, automatic starting and stopping of the diesel engine, frequent starting protection, locomotive safety mode control and the like are realized, and the requirement of automatic starting and stopping of the diesel engine for heat preservation under the condition of unmanned monitoring is met; the problem that in the prior art, people must stare at or control or additionally install an additional heat preservation heating device is solved.

Description

Technical Field

[0001] The invention relates to the technical field of diesel engine automatic start-stop and heat preservation, and in particular to a control method for automatic start-stop and heat preservation of an unmanned monitoring diesel engine. Background Art

[0002] Winter diesel engine insulation has always been a problem that has plagued diesel locomotives. If antifreeze is used, the maintenance price of the diesel engine will be high. If normal deionized water + additives are used, the diesel engine needs to be heated in winter to prevent the pipes from freezing. When existing diesel locomotives are placed outdoors in winter, special personnel will be arranged to perform temperature operations at irregular intervals. After getting on the train, the personnel will manually start the diesel engine, and then monitor the locomotive status on the train. When the water temperature reaches the requirement, it will be manually stopped. This method requires a large amount of labor and requires personnel to monitor it all the time. If the monitoring is not timely, the locomotive will fail due to failure to detect abnormal locomotive data in time or the diesel engine will not be stopped in time after the temperature meets the requirement, resulting in fuel waste.

[0003] As dual-source locomotives and new energy locomotives are increasingly put into use, new locomotives will be equipped with electric heating equipment to separately insulate and preheat the diesel engine oil and water. The microcomputer detects the diesel water temperature to control the start and stop of the equipment to keep the diesel engine warm in winter. This technology has the disadvantages of requiring the installation of an additional set of equipment, which is costly, and can only be used when the locomotive is running.

[0004] For example, as described in the Chinese patent "Internal-electric dual-source EMU and internal combustion engine insulation control method and system" with application number 202111499081.0, the method is applicable to internal-electric dual-source EMUs, in which the internal diesel power vehicle sets three different diesel engine water temperature thresholds, namely 10°C, 25°C and 60°C. After the EMU enters the electric mode, the microcomputer detects the diesel engine water temperature. If the water temperature is lower than 10°C, the diesel engine starts for heating and insulation until the water temperature exceeds 60°C. If the water temperature is higher than 10°C but lower than 25°C, the 600V diesel engine heating device is started by the electric locomotive. If the water temperature is higher than 25°C but lower than 60°C, the diesel engine and its heating device will not start. The crew can judge whether the diesel engine needs to be started in advance according to the actual use situation to ensure the normal use of the subsequent off-grid area. The specific control logic block diagram is as follows Figure 1 shown.

[0005] This method has the following problems: (1) This method is applicable to a limited number of scenarios, because it is necessary to use other power sources to power the heating equipment when the diesel engine is stopped. Therefore, it can only be applied to locomotives with dual or multiple power sources. (2) This method is relatively expensive and occupies more space in the locomotive, which is not conducive to locomotive design. It also increases the cost of subsequent maintenance because it is necessary to install an additional independent preheating device on the locomotive. The preheating device generally includes at least a heater, a water pump, and related pipes and valves, which increases the manufacturing cost of the entire vehicle. At the same time, the preheating equipment occupies locomotive space, increasing the difficulty of design. The device also needs to be maintained later to prevent leakage and failure, which increases the workload and cost of inspection and maintenance.

[0006] (3) This method has a high labor cost. Someone must be on the locomotive to operate and monitor it. This is because this function can only be used in the power mode when the locomotive is in operation or storage. Someone must be on the locomotive to monitor and operate it. Unmanned control cannot be achieved, and the labor cost is high. (4) The diesel engine insulation control logic is simple, with relatively few control parameters, and fails to take into account the overall situation of the vehicle. This method only controls the diesel engine water temperature, and does not consider the parameters of other important components of the locomotive, such as battery voltage, locomotive total wind pressure, etc. It fails to take into account the overall situation of the vehicle, and there are risks in locomotive control.

[0007] For example, as described in the Chinese patent "Internal Combustion Locomotive Diesel Engine Insulation Preheating Device and Method" with application number 202211413304.1, the method is to install an insulation preheating device (including an electric heater, a preheating circulating water pump, etc.) on the locomotive, wherein the electric heater is arranged in the locomotive expansion water tank, one end of the preheating circulating water pump is connected to the water tank, and the other end is connected to the pipeline of the diesel engine cooling circulation system. The locomotive microcomputer controls the start and stop of the insulation preheating device by detecting the water temperature of the diesel engine, so as to keep the heat when the diesel engine is not started. The specific logic block diagram is as follows Figure 2 shown.

[0008] The characteristics of this technical solution are as follows: the electric heater is arranged inside the expansion water tank, the preheating circulating water pump is connected to the high point of the water system pipeline, the start and stop of the electric heater and the preheating circulating water pump are controlled by the locomotive microcomputer, and a liquid level switch is arranged in the expansion water tank to prevent the electric heater from drying out. When the water temperature is lower than the set temperature threshold, the microcomputer system starts the electric heater to heat the cooling water in the circulating water tank, and at the same time, the preheating circulating water pump sends the cooling water to the diesel engine cooling circulation system to keep the diesel engine warm and preheat it. When the cooling water temperature reaches the specified temperature threshold, the electric heater and the preheating circulating water pump are turned off to stop heating the circulating water.

[0009] This method has the following problems: (1) This method is applicable to a limited number of scenarios, because it is necessary to use other power sources to power the heating equipment when the diesel engine is stopped. Therefore, it can only be applied to locomotives with dual or multiple power sources. (2) This method is relatively expensive and occupies more space in the locomotive, which is not conducive to locomotive design. It also increases the cost of subsequent maintenance because it is necessary to install an additional independent preheating device on the locomotive, which increases the manufacturing cost of the entire vehicle. Although the electric heater is integrated inside the water tank, the preheating circulating water pump is still installed on the locomotive. At the same time, related pipelines, check valves, contactors, circuit breakers, etc. are added, which occupy locomotive space and increase the difficulty of design. The device also needs to be maintained later to prevent leakage and failure, which increases the workload and cost of inspection and maintenance; (3) This method has a high labor cost. Personnel must be on the locomotive to operate and monitor. This method requires personnel to monitor and operate on the locomotive. Unmanned control cannot be achieved, and the labor input cost is high.

[0010] In view of this, it is of great significance to develop a control method for automatic start-stop and insulation of unmanned diesel engines. Summary of the invention

[0011] The main purpose of the present invention is to provide a control method for automatic start-stop and heat preservation of unmanned diesel engines, so that the locomotive can achieve multiple goals such as full-range monitoring of the whole vehicle, automatic start-stop of the diesel engine, frequent protection of diesel engine start, and locomotive safety mode control without additional equipment, meet the requirements of automatic start-stop and heat preservation of the diesel engine under unmanned monitoring, and solve the following problems caused by the need for personnel monitoring or installation of additional heat preservation and heating devices in the past: (1) The traditional method of adding additional equipment for insulation is applicable to few car models; (2) Manual temperature treatment results in high labor costs; (3) The additional equipment will cause insufficient space on the locomotive and make the design difficult; (4) The additional equipment installation results in high locomotive costs and subsequent overhaul and maintenance prices; (5) The traditional diesel engine automatic start-stop control logic is simple and fails to take into account the overall situation of the vehicle, resulting in control risks; (6) High fuel consumption due to insufficient monitoring during the diesel engine warm-up process.

[0012] According to one aspect of the present invention, a control method for automatic start-stop and heat preservation of an unmanned diesel engine is provided, which comprises the following steps: S1, the control system determines the conditions for starting the automatic start-stop mode, and if the conditions are met, the control system performs the automatic start-stop mode entry operation on the locomotive, and controls the locomotive to start executing the automatic start-stop mode; S2. The control system performs technical parameter condition detection. If all technical parameters are met, the diesel engine stops or remains in a stopped state. If any technical parameter is not met, the diesel engine automatically starts or remains in a started state until all technical parameters are met and the diesel engine stops again. S3, executing the exit mode operation on the locomotive, controlling the locomotive to exit the automatic start-stop mode; Among them, the timing starts from the beginning of the automatic start-stop mode. If the number of automatic starts of the diesel engine exceeds the preset number in one cycle, the diesel engine will not stop even if all technical parameters are met until the next cycle starts again; If the ambient temperature is lower than the preset temperature, the diesel engine will automatically increase the speed; If the diesel engine fails to start for the first time, it will automatically re-enter the starting procedure. After multiple starting failures, the diesel engine will stop starting and the control locomotive will send out an alarm signal.

[0013] According to one embodiment of the present invention, the start-stop mode activation conditions include: The speed of the locomotive is 0; The locomotive applies individual brakes; The control battery voltage of the locomotive is ≥ battery voltage*0.96; The locomotive's main handle is in the zero position and the direction handle is in the neutral position; The locomotive's control panel was not activated; The locomotive has no faults that affect the starting of the diesel engine; The starting power supply voltage of the diesel engine ≥ power supply voltage*0.96 and / or the starting air cylinder pressure ≥800kpa.

[0014] According to one embodiment of the present invention, the technical parameters all meet the following requirements: If the diesel engine is in shutdown state, the locomotive control battery voltage ≥ battery voltage * 0.96; If the diesel engine is in the start-stop state, the locomotive control battery charging current is ≤20A; The high temperature water temperature of the diesel engine is ≥60℃; The intercooler water temperature of the diesel engine is ≥20℃; The brake cylinder pressure of the locomotive is ≥750kpa; The starting power supply voltage of the diesel engine ≥ power supply voltage * 0.96 and / or the starting air cylinder pressure ≥ 800kpa; Ambient temperature ≥4℃.

[0015] According to one embodiment of the present invention, the exit mode operation includes one or more of operating a display screen button, operating a brake handle, operating a main handle, operating a direction handle, and activating a control panel.

[0016] According to one embodiment of the present invention, one cycle is 6 to 24 hours.

[0017] According to an embodiment of the present invention, the preset number of times is ≥2 times.

[0018] According to an embodiment of the present invention, the ambient temperature being lower than the preset temperature includes the ambient temperature being ≤ -15°C.

[0019] According to one embodiment of the present invention, diesel engine stop buttons are provided on both sides of the locomotive exterior.

[0020] According to one embodiment of the present invention, the multiple times is ≥3 times.

[0021] According to one embodiment of the present invention, automatically increasing the speed of the diesel engine includes adjusting the speed of the diesel engine to the second gear.

[0022] In a control method for automatic start-stop and heat preservation of an unmanned diesel engine according to an embodiment of the present invention, the locomotive can achieve multiple goals such as full-range vehicle monitoring, automatic start-stop of the diesel engine, frequent start protection of the diesel engine, and locomotive safety mode control without additional equipment, meet the requirements of automatic start-stop and heat preservation of the diesel engine under unmanned monitoring, and solve the following problems caused by the need for personnel monitoring or installation of additional heat preservation and heating devices in the past: 1. The traditional method of adding additional equipment for insulation is applicable to few car models; 2. Manual temperature adjustment results in high labor costs; 3. The additional equipment will cause insufficient space on the locomotive and make the design difficult; 4. The additional installation of equipment results in high locomotive costs and subsequent overhaul and maintenance prices; 5. The traditional diesel engine automatic start-stop control logic is simple and fails to take into account the overall situation of the vehicle, which leads to control risks; 6. High fuel consumption due to insufficient monitoring during the diesel engine warm-up process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required for use in the embodiment will be briefly introduced below. Obviously, the drawings described below are only some implementation cases of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 The control logic block diagram of the internal-electric dual-source EMU and the internal combustion engine insulation control method thereof in the prior art is shown; Figure 2 The control logic block diagram of the internal combustion engine preheating method of the prior art is shown; Figure 3 A flow chart showing a method for controlling automatic start, stop and heat preservation of an unmanned monitoring diesel engine according to an exemplary embodiment of the present invention is shown; Figure 4A control logic block diagram of a control method for automatic start, stop and heat preservation of an unmanned monitoring diesel engine according to an exemplary embodiment of the present invention is shown. DETAILED DESCRIPTION

[0025] The detailed description of the following embodiments is used to exemplify the principles of the present invention, but cannot be used to limit the scope of the present invention. The present invention can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0026] The present invention provides these embodiments to make this disclosure thorough and complete, and fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of materials, numerical expressions and numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, rather than as limiting.

[0027] It should be noted that, in the description of the present invention, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, 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 cannot be understood as a limitation on the present invention. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0028] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to 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 intermediate device between the specific device and the first device or the second device.

[0029] All terms used in the present invention have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0030] Technologies, methods, and apparatus known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, these technologies, methods, and apparatus should be considered part of the specification.

[0031] like Figure 3 As shown, the present invention provides a control method for automatic start-stop and heat preservation of an unmanned monitoring diesel engine, which comprises the following steps: S1, the control system determines the conditions for starting the automatic start-stop mode, and if the conditions are met, the control system performs the automatic start-stop mode entry operation on the locomotive, and controls the locomotive to start executing the automatic start-stop mode; S2. The control system performs technical parameter condition detection. If all technical parameters are met, the diesel engine stops or remains in a stopped state. If any technical parameter is not met, the diesel engine automatically starts or remains in a started state until all technical parameters are met and the diesel engine stops again. S3, executing the exit mode operation on the locomotive, controlling the locomotive to exit the automatic start-stop mode; Among them, the timing starts from the beginning of the automatic start-stop mode. If the number of automatic starts of the diesel engine exceeds the preset number in one cycle, the diesel engine will not stop even if all technical parameters are met until the next cycle starts again; If the ambient temperature is lower than the preset temperature, the diesel engine will automatically increase the speed; If the diesel engine fails to start for the first time, it will automatically re-enter the starting procedure. After multiple starting failures, the diesel engine will stop starting and the control locomotive will send out an alarm signal.

[0032] The control method for automatic start-stop and heat preservation of an unmanned diesel engine of the embodiment of the present invention is applicable to a wide range of vehicle types, does not require personnel monitoring, does not require additional equipment, has low labor costs and locomotive costs, is friendly to locomotive design and overhaul and maintenance, and can be applied to any microcomputer-controlled internal combustion locomotive, and can be directly used on existing locomotives without the need for additional equipment, thereby solving the shortcomings of existing solutions such as high cost, small applicability, and high labor costs. At the same time, it is equipped with functions such as comprehensive data monitoring, automatic speed increase at low temperature, and frequent diesel engine start protection, which not only ensures locomotive energy saving, but also focuses on the safety and service life of the diesel engine.

[0033] After the locomotive is powered on, the default state of the self-start and stop mode is off, and the locomotive display screen will prompt the state of this mode. If you want to turn it on, you first need to confirm that the locomotive meets the conditions for turning on the self-start and stop mode. The display screen will prompt whether each operation is completed one by one. When the locomotive computer detects that all operations have been completed, it will display a prompt that the conditions have been met, and then turn on the self-start and stop mode by operating the button on the display screen. The locomotive successfully enters the self-start and stop mode, and the display screen will also prompt the current state of the mode.

[0034] In some specific embodiments, the start-stop mode activation conditions include: The speed of the locomotive is 0; The locomotive applies individual brakes; The control battery voltage of the locomotive is ≥ battery voltage*0.96; The locomotive's main handle is in the zero position and the direction handle is in the neutral position; The locomotive's control panel was not activated; The locomotive has no faults that affect the starting of the diesel engine; and The starting power supply voltage of the diesel engine ≥ power supply voltage*0.96 and / or the starting air cylinder pressure ≥800kpa.

[0035] After the locomotive enters the automatic start-stop mode, the people on board can evacuate the locomotive, and the microcomputer detects the technical parameters of the locomotive at this time. When the following technical parameter conditions are all met, the diesel engine stops or maintains the stopped state; when any technical parameter condition is not met, the diesel engine automatically starts or maintains the started state until all conditions are met and it stops again, and this cycle is repeated.

[0036] Based on the above embodiments, all technical parameters are satisfied including: If the diesel engine is in shutdown state, the locomotive control battery voltage ≥ battery voltage * 0.96; If the diesel engine is in the start-stop state, the locomotive control battery charging current is ≤20A; The high temperature water temperature of the diesel engine is ≥60℃; The intercooler water temperature of the diesel engine is ≥20℃; The brake cylinder pressure of the locomotive is ≥750kpa; The starting power supply voltage of the diesel engine ≥ power supply voltage*0.96 and / or the starting air cylinder pressure ≥800kpa; and Ambient temperature ≥4℃.

[0037] The present invention is mainly aimed at the diesel engine self-start and stop insulation control when the locomotive is static (i.e. the locomotive speed is 0). When applied to a dual-source locomotive or a hybrid locomotive, it is also applicable under the dynamic operating conditions of the locomotive. However, it is necessary to adjust the conditions for entering the self-start and stop mode and the exit mode operation, such as the locomotive speed is 0, the locomotive main handle is at zero position and the direction handle is at neutral position, the control panel is not activated, and the locomotive applies a single brake.

[0038] Based on the above embodiments, the exit mode operation includes one or more of operating a display screen button, operating a brake handle, operating a main handle, operating a direction handle, and activating a control panel.

[0039] When the locomotive needs to perform other tasks, the driver and crew can get on board and exit the mode by any of the following methods: (1) operating the button on the display screen to exit the automatic start-stop mode; (2) operating the brake handle; (3) operating the main handle or direction handle; (4) activating the control panel, the locomotive exits the automatic start-stop mode, and the display screen displays the main interface information.

[0040] Based on the above embodiment, one cycle is 6 to 24 hours. Specifically, one cycle is 12 hours.

[0041] In some specific embodiments, the preset number of times is ≥2 times.

[0042] On the basis of the above embodiment, when the ambient temperature is lower than the preset temperature, including the ambient temperature ≤ -15°C, the diesel engine automatically increases the speed to the second gear to ensure that the water temperature can continue to rise.

[0043] On the basis of the above embodiments, in order for the personnel under the locomotive to stop the diesel engine in time when no one is in the locomotive, diesel engine stop buttons are provided on both sides of the locomotive exterior.

[0044] In some specific embodiments, multiple times is ≥ 3 times. The diesel engine has a start failure protection function. When the diesel engine fails to start for the first time, it automatically re-enters the start procedure. When the diesel engine fails to start for a total of 3 times, the diesel engine stops starting and the control locomotive sends an alarm signal.

[0045] Based on the above embodiment, the diesel engine automatically increases the speed including adjusting to the second gear. When the diesel engine automatically increases the speed and adjusts to the second gear, it means that the fuel burns more fully and the work frequency is accelerated per unit time, which can make the engine output greater power.

[0046] This application has the following features: (1) The default state of the locomotive automatic start-stop mode is off. Necessary operations must be performed before entering the mode, otherwise the mode cannot be entered. Necessary operations include: locomotive speed is 0; locomotive brake is applied alone; locomotive control battery voltage ≥ battery voltage * 0.96; locomotive main handle is in zero position, direction handle is in neutral position; control panel is not activated; locomotive has no faults that affect diesel engine starting; diesel engine starting power supply voltage ≥ power supply voltage * 0.96 or starting air cylinder pressure ≥ 800kpa; (2) After the locomotive enters the self-start and stop mode, the microcomputer detects the main technical parameters of the locomotive, which include: locomotive control battery voltage ≥ battery voltage * 0.96 (stop state); locomotive control battery charging current ≤ 20A (start state); diesel engine high temperature water temperature ≥ 60℃; diesel engine intermediate cold water temperature ≥ 20℃; locomotive brake air cylinder pressure ≥ 750kpa; diesel engine starting power supply voltage ≥ power supply voltage * 0.96 or starting air cylinder pressure ≥ 800kpa; ambient temperature ≥ 4℃; (3) When the microcomputer detects that all the main technical parameters are met, the diesel engine stops or remains in the stopped state. When any of the conditions are not met, the diesel engine starts or remains in the started state. (4) It has a protection against excessive diesel engine starts. It starts from the start of the automatic start-stop mode. If the diesel engine starts automatically more than twice within 12 hours, the diesel engine will not stop even if all the shutdown conditions are met until the next 12-hour interval starts again. (5) After the diesel engine is started, the speed can be automatically adjusted according to the ambient temperature. If the ambient temperature is too low (lower than the set threshold of -15°C), the diesel engine will automatically increase the speed to the second gear to ensure that the water temperature can continue to rise; (6) In order to enable personnel to stop the diesel engine in time when no one is in the vehicle, diesel engine stop buttons are installed on both sides of the locomotive; (7) The diesel engine has a start failure protection function. When the diesel engine fails to start for the first time, it will automatically re-enter the start procedure. When the diesel engine fails to start for a total of 3 times, the diesel engine stops starting and the locomotive sends out an alarm signal; (8) When any of the following operations are performed on the locomotive, the microcomputer controls the locomotive to exit the automatic start-stop mode and the display screen provides status prompts. The specific operations include: ① operating the display screen button to exit the automatic start-stop mode; ② operating the brake handle; ③ operating the main handle or direction handle; ④ activating the control panel.

[0047] (9) The invention does not require the installation of additional electric heating and water circulation equipment, but can utilize the vehicle's own water temperature sensor, battery voltage and current sensor, air cylinder pressure sensor, and ambient temperature sensor.

[0048] For locomotives equipped with power batteries, the necessary operations before entering the mode can include power battery input, and adding power battery power ≥ 30% to the main data of locomotive detection, and other power battery operation and detection steps.

[0049] like Figure 4 As shown, the present application is described below through a specific embodiment.

[0050] (1) The driver and passengers board the bus; (2) Close all the circuit breakers on the locomotive and confirm that the locomotive computer, display screen and brake have been started; (3) The locomotive brake is fully applied, the direction handle is placed in the neutral position, the main handle is placed in the zero position, and the locomotive parameters are checked on the display screen to confirm that the locomotive speed is 0, the control battery power is more than 50%, there is no fault on the display screen that affects the diesel engine starting, the diesel engine starting power supply voltage ≥ power supply voltage * 0.96 or the starting air cylinder pressure ≥ 800kpa. When the above conditions are met, cancel the activation state of the control consoles at both ends; (4) Press the start button for automatic start-stop mode on the display screen or console; (5) The display automatically jumps to the automatic start-stop mode interface and displays the parameters being monitored. The driver and passengers can evacuate the locomotive; (6) After the locomotive enters the automatic start-stop mode, it automatically monitors the following data: ① If the diesel engine is stopped, the locomotive control battery voltage ≥ battery voltage * 0.96; ② If the diesel engine is in the start-stop state, the locomotive control battery charging current is ≤20A; ③ Diesel engine high temperature water temperature ≥ 60℃; ④ The cooling water temperature in the diesel engine is ≥20℃; ⑤Locomotive brake air cylinder pressure ≥750kpa; ⑥ Diesel engine starting power supply voltage ≥ power supply voltage * 0.96 or starting air cylinder pressure ≥ 800kpa; ⑦ Ambient temperature ≥ 4°C; If all the above data meet the requirements, the locomotive maintains the shutdown state or shuts down the diesel engine. If any of the above data is not met, the locomotive maintains the diesel engine start state or starts the diesel engine. After this step, the diesel engine will be in one of the three states of shutdown, start failure or start success. (7) If the diesel engine is in the stopped state, the locomotive microcomputer continues to detect the above parameters until the diesel engine is started; (8) If the diesel engine fails to start, the microcomputer automatically attempts to start it a second time. If the start fails three times in a row, the diesel engine stops starting, an alarm sounds to indicate the start failure, and the locomotive exits the automatic start-stop mode; (9) If the diesel engine starts successfully, the microcomputer will detect the number of times the diesel engine has been started within 12 hours since entering the start-stop mode. If it has exceeded three times, the diesel engine will remain in the started state until 12 hours have passed. If it has not exceeded three times, the microcomputer will continue to detect the above parameters until the diesel engine stops; At the same time, the microcomputer detects whether the ambient temperature is lower than the set threshold (-15°C). If it is lower than this temperature, the diesel engine will execute the second gear speed. If it is higher than this temperature, the diesel engine will brake and idle at speed. (10) When the locomotive needs to perform other tasks, the crew can get on board and perform the exit mode operation by any of the following methods: ①Operate the button on the display screen to exit the automatic start-stop mode; ②Operate the brake handle; ③Operate the main handle or direction handle; ④ Activate the control panel, the locomotive exits the automatic start-stop mode, and the display screen shows the main interface information.

[0051] After the implementation of the present invention, at least the following beneficial effects are achieved: (1) The conventional method of adding additional equipment for heat preservation is applicable to a limited number of vehicle models and is only applicable to internal combustion locomotives that have been equipped with heating and circulation equipment. The present invention can be applied to all microcomputer-controlled internal combustion locomotives. By utilizing the existing sensors and related equipment of the locomotive, the control method can be added to the microcomputer system to realize the automatic start and stop heat preservation of the diesel engine. (2) The traditional manual temperature-setting method requires a dedicated person to monitor and control, which has a high labor cost. The present invention can achieve the goal of eliminating the need for human monitoring after the operation is completed once. The locomotive control is completely realized by a microcomputer, which reduces the labor cost. (3) The additional installation of heat preservation equipment occupies the space of the locomotive, resulting in insufficient locomotive space and great design difficulty. The present invention uses all existing sensors and equipment of the locomotive, and no additional equipment is required, which does not affect the locomotive space. (4) The additional installation of equipment will increase the locomotive purchase cost and subsequent repair and maintenance price. The present invention does not require additional installation of equipment, which will not increase the locomotive purchase and repair and maintenance costs; (5) The traditional diesel engine automatic start-stop control logic is simple, only monitoring the water temperature, failing to take into account the overall situation of the vehicle, and there are risks in the control. The present invention not only monitors the water temperature, but also monitors the battery capacity, air cylinder pressure, brake status, ambient temperature, diesel engine start-stop times, etc. of the locomotive, comprehensively monitoring the locomotive situation, and ensuring that the locomotive can operate normally when no one is present; (6) The high fuel consumption is caused by insufficient monitoring during the diesel engine warming process. The method of the present invention is completely controlled by a microcomputer. When all conditions meet the requirements, the diesel engine can be stopped immediately to save fuel.

[0052] The above are exemplary embodiments disclosed in the present invention. The order disclosed in the above embodiments of the present invention is for description only and does not represent the advantages and disadvantages of the embodiments. However, it should be noted that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope disclosed in the embodiments of the present invention (including the claims) is limited to these examples. Various changes and modifications may be made without departing from the scope defined in the claims. The functions, steps and / or actions of the method claims according to the disclosed embodiments described herein do not need to be performed in any particular order. In addition, although the elements disclosed in the embodiments of the present invention may be described or required in individual form, they may also be understood as multiple unless explicitly limited to the singular.

[0053] A person skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples; under the concept of the embodiments of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the embodiments of the present invention as described above, which are not provided in detail for the sake of simplicity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A control method for automatic start-stop and heat preservation of an unmanned diesel engine, characterized in that: The following steps are involved: S1, the control system determines the conditions for starting the automatic start-stop mode, and if the conditions are met, the control system performs the automatic start-stop mode entry operation on the locomotive, and controls the locomotive to start executing the automatic start-stop mode; S2, the control system performs technical parameter condition detection, if all the technical parameters are met, the diesel engine stops or maintains the stopped state, if any of the technical parameters is not met, the diesel engine automatically starts or maintains the started state, until all the technical parameters are met and the diesel engine stops again; S3, executing an exit mode operation on the locomotive to control the locomotive to exit the automatic start-stop mode; Wherein, the timing starts from the beginning of the execution of the automatic start-stop mode. If the number of automatic starts of the diesel engine exceeds the preset number within one cycle, the diesel engine will not stop even if all the technical parameters are met until the timing starts again in the next cycle; If the ambient temperature is lower than the preset temperature, the diesel engine will automatically increase the speed; If the diesel engine fails to start for the first time, it will automatically re-enter the starting procedure. After multiple starts fail, the diesel engine stops starting and the control locomotive sends an alarm signal.

2. The control method for automatic start-stop and heat preservation of unmanned diesel engine according to claim 1 is characterized in that: The default state of the self-start-stop mode is off. Before entering the mode, the start condition must be judged, otherwise the self-start-stop mode cannot be entered. The start condition of the self-start-stop mode includes: The speed of the locomotive is 0; said locomotive applies individual brakes; The control battery voltage of the locomotive ≥ battery voltage*0.96; The main handle of the locomotive is in the zero position, and the direction handle is in the neutral position; The control panel of said locomotive is not activated; The locomotive has no faults that affect the starting of the diesel engine; and The starting power supply voltage of the diesel engine is ≥ power supply voltage*0.96 and / or the starting air cylinder pressure is ≥800kpa.

3. The control method for automatic start-stop and heat preservation of unmanned diesel engine according to claim 1, characterized in that: The technical parameters all meet include: If the diesel engine is in a stopped state, the locomotive control battery voltage ≥ battery voltage * 0.96; If the diesel engine is in the start-stop state, the locomotive control battery charging current is ≤20A; The high temperature water temperature of the diesel engine is ≥60°C; The intercooler water temperature of the diesel engine is ≥20°C; The brake cylinder pressure of the locomotive is ≥750kpa; The starting power supply voltage of the diesel engine is ≥ power supply voltage*0.96 and / or the starting air cylinder pressure is ≥800kpa; and Ambient temperature ≥4℃.

4. The control method for automatic start-stop and heat preservation of unmanned diesel engine according to claim 1, characterized in that: The exit mode operation includes one or more of operating a display screen button, operating a brake handle, operating a main handle, operating a direction handle, and activating a control panel.

5. The control method for automatic start-stop and heat preservation of unmanned diesel engine according to claim 1, characterized in that: The one cycle is 6 to 24 hours.

6. The control method for automatic start-stop and heat preservation of unmanned diesel engine according to claim 1, characterized in that: The preset number of times is ≥2 times.

7. The control method for automatic start-stop and heat preservation of unmanned diesel engine according to claim 1, characterized in that: The ambient temperature being lower than the preset temperature includes an ambient temperature ≤ -15°C.

8. The control method for automatic start-stop and heat preservation of unmanned diesel engine according to claim 1, characterized in that: Diesel engine stop buttons are arranged on both sides of the locomotive exterior.

9. The control method for automatic start-stop and heat preservation of unmanned diesel engine according to claim 1, characterized in that: The multiple times are ≥3 times.

10. The control method for automatic start-stop and heat preservation of unmanned diesel engine according to claim 1, characterized in that: The automatic speed increase of the diesel engine includes adjusting the speed to the second gear.

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