An adaptive fuel preheat system, method, and loader

Abstract

The application discloses a self-adaptive fuel preheating system, method and loader, and belongs to the field of fuel preheating systems.The self-adaptive fuel preheating system comprises a cooling liquid temperature sensor, a backwater temperature sensor, a central controller and an electric stop valve; the fuel preheating assembly comprises a fuel preheater and a cooling liquid circulating pump; the backwater temperature sensor is installed on a backwater pipeline of the fuel preheater, and is used for detecting the backwater temperature of the fuel preheater and transmitting temperature information to the central controller; the cooling liquid temperature sensor is used for detecting the cooling liquid temperature and transmitting temperature information to the central controller; and the central controller is used for receiving the temperature information of the cooling liquid temperature sensor and the backwater temperature sensor, and adjusting and starting and stopping the heating mode of the fuel preheater, and opening and closing the electric stop valve according to the temperature information.The self-adaptive fuel preheating system can realize unattended preheating work, reduce fuel use cost and reduce engine cold start wear.

Description

Technical Field

[0001] This invention relates to an adaptive fuel preheating system, method, and loader, belonging to the field of loader technology. Background Technology

[0002] Loaders operating in extremely cold regions and frequently stored outdoors with intermittent operation often face difficulties in cold starts, thus requiring the installation of fuel preheating systems. Most commercially available fuel preheating systems currently operate on the principle of using diesel or kerosene as fuel, powered by a DC power supply. The fuel pump draws fuel from the tank, where it evaporates into fuel vapor in the heater's combustion chamber. This vapor mixes with combustion air supplied by the combustion air impeller and undergoes complete combustion. Heat is then transferred to the circulating fluid via a heat exchanger, which in turn delivers the heat to the components requiring preheating. The circulated fluid then flows back to the fuel preheating system's water tank, achieving the desired preheating effect for other components. However, this system requires manual operation and relies on monitoring the temperature at the fuel preheater's outlet to determine whether the preheating function needs to be activated or deactivated; it cannot automatically make informed decisions based on coolant temperature. When the coolant temperature is high and the preheating system is not required, if the fuel preheater outlet temperature is lower than the set temperature when the operator turns on the switch, the preheating system will still start immediately, increasing fuel consumption, which cannot avoid misoperation and increases exhaust emissions. When the coolant temperature is low but the engine can be started, the operator's forced cold start of the engine will increase engine wear. Summary of the Invention

[0003] To address the problems existing in the prior art, the present invention provides an adaptive fuel preheating system, method, and loader, which reduces fuel usage costs and engine cold start wear.

[0004] To achieve the above objectives, the present invention employs an adaptive fuel preheating system, which includes a coolant temperature sensor connected to the engine, a return water temperature sensor connected to the fuel preheating assembly, a central controller, and an electric shut-off valve installed between the distributor and the engine.

[0005] The fuel preheating assembly includes a fuel preheater and a coolant circulation pump. The return water temperature sensor is installed on the return water pipe of the fuel preheater. The return water temperature sensor is used to detect the return water temperature of the fuel preheater and transmit the temperature information to the central controller.

[0006] The coolant temperature sensor is used to detect the coolant temperature and transmit the temperature information to the central controller.

[0007] The central controller is used to receive temperature information from the coolant temperature sensor and the return water temperature sensor, and to adjust the heating mode and start / stop the fuel preheater and control the opening and closing of the electric shut-off valve based on the temperature information.

[0008] As an improvement to the solution, a touch screen connected to the central controller is also included, which is used to display coolant temperature, return water temperature, and the opening and closing information of the electric shut-off valve.

[0009] As an improvement to the solution, the electric shut-off valve, fuel preheater, and coolant circulation pump can be manually controlled to start and stop.

[0010] In addition, the present invention also provides a loader on which the aforementioned adaptive fuel preheating system is installed.

[0011] Finally, the present invention also provides an adaptive fuel preheating method, employing the aforementioned adaptive fuel preheating system, comprising the following steps: before the fuel preheater is started, a coolant temperature sensor detects the coolant temperature value T0, and a central controller compares the coolant temperature value T0 with a set standard temperature gradient:

[0012] ① When -40℃<T0≤5℃, the central controller starts the fuel preheater and coolant circulation pump, and the central controller controls the opening of the electric shut-off valve;

[0013] ② When 5℃<T0≤25℃, the central controller will not start the fuel preheater; only the start / stop of the coolant circulation pump and the opening / closing of the electric shut-off valve can be manually selected.

[0014] ③ When T0 > 25℃, the central controller will not start the fuel preheater and coolant circulation pump, and the central controller will close the electric shut-off valve.

[0015] As an improvement to the solution, when the coolant temperature T0 meets the condition of -40℃<T0≤5℃, the central controller obtains the fuel preheater return water temperature T1 through the return water temperature sensor.

[0016] When -40℃≤T1≤60℃, the central controller controls the fuel preheater to a high-power heating state;

[0017] When 60℃ < T1 < 80℃, the central controller controls the fuel preheater to a low-power heating state.

[0018] When T1 = 80℃, the central controller shuts down the fuel preheater, and preheating is complete.

[0019] As an improvement to the solution, when the coolant temperature T0 meets the condition of -40℃ < T0 ≤ 5℃, the red indicator light is on and the green indicator light is off. At this time, the engine cannot be started. The engine can only be started after the preheating is completed.

[0020] As an improvement to the solution, when the coolant temperature T0 meets the condition of 5℃<T0≤25℃, the coolant circulation pump and electric shut-off valve are manually turned on, and the engine waste heat is used to provide heat to the battery heating tray and the heater, so the coolant enters the large circulation; when the coolant circulation pump and electric shut-off valve are manually turned off, the engine waste heat is used to provide heat to the heater, so the coolant enters the small circulation.

[0021] As an improvement to the solution, when the coolant temperature T0 meets the condition T0>5℃, the red indicator light is off and the green indicator light is on, allowing the engine to be started directly.

[0022] Compared with the prior art, the adaptive fuel preheating system of the present invention has the following advantages:

[0023] (1) By setting the control logic of a specific fuel preheater based on the different initial temperature gradients of the coolant, automatic preheating can be achieved without manual intervention.

[0024] (2) By monitoring the coolant return water temperature in real time, specific heating power can be adopted according to different temperature ranges to reduce fuel consumption.

[0025] (3) By adjusting the engine start logic and dual-color indicator lights, the operator is prevented from forcibly starting the engine, thus increasing the engine's self-protection function. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a flowchart of the control strategy of the present invention;

[0029] In the diagram: 1. Fuel preheating assembly, 2. Water distributor, 3. Battery heating tray, 4. Fuel heater, 5. Engine, 6. Heater, 7. Hydraulic oil heater, 8. Electric shut-off valve, 9. Return water temperature sensor, 10. Touch screen, 11. Coolant temperature sensor, 12. Central controller. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below. However, it should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0032] like Figure 1 , Figure 2 As shown, an adaptive fuel preheating system includes a fuel preheating assembly 1, a central controller 12, a water distributor 2 connected to the fuel preheating assembly 1, a battery heating tray 3, a hydraulic oil heating rod 7, an engine 5 and a fuel heating rod 4 connected to the water distributor 2 respectively, a coolant temperature sensor 11 and a heater 6 connected to the engine 5, a return water temperature sensor 9 connected to the fuel preheating assembly 1, and an electric shut-off valve 8 installed between the water distributor 2 and the engine 5.

[0033] The fuel preheating assembly 1 includes a fuel preheater and a coolant circulation pump. The fuel preheater is used to heat the coolant in the system. The return water temperature sensor 9 is installed on the return water pipe of the fuel preheater. The return water temperature sensor 9 is used to detect the return water temperature of the fuel preheater and transmit the temperature information to the central controller 12.

[0034] The coolant temperature sensor 11 is used to detect the coolant temperature and transmit the temperature information to the central controller 12;

[0035] The central controller 12 is an SDC controller, used to receive temperature information from the coolant temperature sensor 11 and the return water temperature sensor 9, and to adjust the heating mode and start / stop the fuel preheater and control the opening and closing of the electric shut-off valve 8 based on the temperature information.

[0036] As an improvement to the embodiment, it also includes a touch screen 10 connected to the central controller 12, the touch screen 10 being used to display coolant temperature, return water temperature, and the opening and closing information of the electric shut-off valve 8.

[0037] As an improvement to the embodiment, the electric shut-off valve 8, fuel preheater, and coolant circulation pump can be manually controlled to start and stop.

[0038] In addition, the present invention also provides a loader on which the aforementioned adaptive fuel preheating system is installed.

[0039] Finally, as Figure 2As shown, the present invention also provides an adaptive fuel preheating method, employing the aforementioned adaptive fuel preheating system, comprising the following steps:

[0040] Before the fuel preheater starts, the coolant temperature sensor 11 detects the coolant temperature value T0, and the central controller 12 compares the coolant temperature value T0 with the set standard temperature gradient:

[0041] ① When -40℃ < T0 ≤ 5℃, the central controller 12 starts the fuel preheater and coolant circulation pump, and controls the opening of the electric shut-off valve 8. At this time, the engine block is preheated first to ensure that the engine can reach normal working conditions. ② When 5℃ < T0 ≤ 25℃, the central controller 12 does not start the fuel preheater, and can only manually select to start and stop the coolant circulation pump and open and close the electric shut-off valve 8. At this time, the excess heat of the engine is used to preheat other components, saving energy and reducing emissions. ③ When T0 > 25℃, the central controller 12 does not start the fuel preheater and coolant circulation pump, and the central controller 12 closes the electric shut-off valve 8. At this time, the temperature is high and no preheating is required.

[0042] The principle behind setting the standard temperature gradient of this invention is as follows: -40℃ mainly considers the temperature corresponding to the diesel grade. For example, -50# diesel is used in areas with temperatures above -40℃. If the ambient temperature is below -40℃, the fuel used by the fuel preheater will wax and the fuel preheater will not work. When -40℃ < T0 ≤ 5℃, the lubricating oil of the diesel engine has poor low-temperature fluidity. Forced engine starting will cause wear on components such as cylinder liners and pistons. The temperature gradient is improved by 5℃ < T0 ≤ 25℃, but the temperature is still low for the temperature-sensitive battery pack. The diesel engine can start easily without preheating. The residual heat of the engine can be used to preheat the battery pack to ensure its normal operation and also to provide warm air for the cold cab. 0# diesel is suitable for use in areas with a minimum temperature above 5℃. At this time, the engine can use 0# diesel without preheating, which is low in cost. When T0 > 25℃, the battery and other components can work normally without preheating.

[0043] As an improvement to the embodiment, when the coolant temperature value T0 meets the condition of -40℃<T0≤5℃, the central controller 12 obtains the fuel preheater return water temperature value T1 through the return water temperature sensor 9.

[0044] When -40℃≤T1≤60℃, the central controller 12 controls the fuel preheater to a high-power heating state; when 60℃<T1<80℃, the central controller 12 controls the fuel preheater to a low-power heating state; when T1=80℃, the central controller 12 shuts down the fuel preheater, and preheating is complete. In an embodiment of the present invention, when -40℃≤T1≤60℃, the fuel preheater enters the combustion heating state. When the return water temperature of the fuel preheater reaches 60℃, the initial preheating of the entire machine is completed, and all components reach the initial startable state; when 60℃<T1<80℃, the fuel preheater gradually and automatically reduces the heat generation to reduce fuel consumption using a variable frequency pulse width modulation method. Heating stops when the return water temperature reaches 80℃. At this time, the engine coolant, engine oil, fuel, and hydraulic oil temperatures all reach normal operating temperatures, the entire machine can be started, and preheating is complete.

[0045] As an improvement to the embodiment, when the coolant temperature T0 meets the condition of -40℃ < T0 ≤ 5℃, the red indicator light is on and the green indicator light is off. At this time, the engine cannot be started. The engine can only be started after the preheating is completed.

[0046] As an improvement to the embodiment, when the coolant temperature T0 meets the condition of 5℃<T0≤25℃, when the coolant circulation pump and electric shut-off valve 8 are manually turned on, the waste heat of the engine provides heat to the battery heating tray 3 and the heater 6, and the coolant enters the large circulation; when the coolant circulation pump and electric shut-off valve 8 are manually turned off, the waste heat of the engine provides heat to the heater 6, and the coolant enters the small circulation.

[0047] As an improvement to the embodiment, when the coolant temperature T0 meets the condition T0>5℃, the red indicator light is off and the green indicator light is on, allowing the engine to be started directly.

[0048] The adaptive fuel preheating system of the present invention achieves automatic preheating without manual intervention by setting the control logic of a specific fuel preheater based on the different initial temperature gradients of the coolant. By monitoring the coolant return water temperature in real time, it adopts a specific heating power according to different temperature ranges to reduce fuel consumption. By adjusting the engine start logic and dual-color indicator lights, it avoids the operator from forcibly starting the engine and increases the engine's self-protection function.

[0049] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

Claims

1. An adaptive fuel preheating method, characterized in that, An adaptive fuel preheating system is adopted, which includes a coolant temperature sensor (11) connected to the engine (5), a return water temperature sensor (9) connected to the fuel preheating assembly (1), a central controller (12), and an electric shut-off valve (8) installed between the water distributor (2) and the engine (5). The fuel preheating assembly (1) includes a fuel preheater and a coolant circulation pump. The return water temperature sensor (9) is installed on the return water pipe of the fuel preheater. The return water temperature sensor (9) is used to detect the return water temperature of the fuel preheater and transmit the temperature information to the central controller (12). The coolant temperature sensor (11) is used to detect the coolant temperature and transmit the temperature information to the central controller (12). The central controller (12) is used to receive temperature information from the coolant temperature sensor (11) and the return water temperature sensor (9), and to adjust the heating mode and start / stop the fuel preheater and control the opening and closing of the electric shut-off valve (8) according to the temperature information. The adaptive fuel preheating method includes the following steps: before the fuel preheater is started, the coolant temperature sensor (11) detects the coolant temperature value T0, and the central controller (12) compares the coolant temperature value T0 with the set standard temperature gradient: ① When -40℃<T0≤5℃, the central controller (12) starts the fuel preheater and coolant circulation pump, and the central controller (12) controls the opening of the electric shut-off valve (8). ②When 5℃<T0≤25℃, the central controller (12) will not start the fuel preheater, and can only manually select to start / stop the coolant circulation pump and open / close the electric shut-off valve (8). ③ When T0 > 25℃, the central controller (12) does not start the fuel preheater and coolant circulation pump, and the central controller (12) closes the electric shut-off valve (8). When the coolant temperature T0 meets the condition of -40℃<T0≤5℃, the central controller (12) obtains the fuel preheater return water temperature T1 through the return water temperature sensor (9); When -40℃≤T1≤60℃, the central controller (12) controls the fuel preheater to be in high-power heating state; When 60℃ < T1 < 80℃, the central controller (12) controls the fuel preheater to a low-power heating state; When T1=80℃, the central controller (12) shuts off the fuel preheater, and preheating is complete.

2. The adaptive fuel preheating method according to claim 1, characterized in that, When the coolant temperature T0 meets the condition of -40℃ < T0 ≤ 5℃, the red indicator light will be on and the green indicator light will be off. The engine cannot be started at this time. The engine can only be started after the preheating is completed.

3. The adaptive fuel preheating method according to claim 1, characterized in that, When the coolant temperature T0 meets the condition of 5℃<T0≤25℃, the coolant circulation pump and electric shut-off valve (8) are manually turned on, and the residual heat of the engine is used to provide heat to the battery heating tray (3) and the heater (6), and the coolant enters the large circulation; when the coolant circulation pump and electric shut-off valve (8) are manually turned off, the residual heat of the engine is used to provide heat to the heater (6), and the coolant enters the small circulation.

4. An adaptive fuel preheating method according to claim 1 or 3, characterized in that, When the coolant temperature T0 is greater than 5°C, the red indicator light is off and the green indicator light is on, allowing the engine to be started directly.

5. The adaptive fuel preheating method according to claim 1, characterized in that, It also includes a touch screen (10) connected to the central controller (12), the touch screen (10) being used to display the coolant temperature, return water temperature, and the opening and closing information of the electric shut-off valve (8).

6. The adaptive fuel preheating method according to claim 1, characterized in that, The electric shut-off valve (8), fuel preheater, and coolant circulation pump can be manually controlled to start and stop.

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