Intelligent heat dissipation control method and device and engineering machinery thereof

Abstract

According to the intelligent heat dissipation control method and device and the engineering machinery, the rotating speed of a fan can be intelligently controlled according to the working environment and the operation working condition of the engineering machinery, so that an engine rapidly reaches a heat balance state; the temperature of the cooling liquid in the heat balance state is accurately controlled within the temperature range capable of enabling the engine to be in the optimal working state, the engine is prevented from being too cold or too hot, meanwhile, the working efficiency of the engine is further improved, and the oil consumption of the whole machine is reduced; the self-adaptive closed-loop control cooling fan is in a non-operation mode, an idle-speed operation mode, an accurate control operation mode and a highest-speed operation mode, so that the power consumption of the fan is reduced; the structure is simple and implementation is convenient.

Description

Technical Field

[0001] The invention relates to an intelligent heat dissipation control method, device and engineering machinery thereof, belonging to the technical field of heat dissipation of engineering machinery. Background Art

[0002] Construction machinery has the characteristics of complex construction conditions and harsh operating environment. In order to keep its engine in good working condition at all times, the engine cooling system must be reasonably controlled to keep the engine coolant temperature accurately within the optimal range, ensuring that the engine will not work unreliably due to overheating, and avoiding the consequences of heat loss and increased effective power loss caused by excessive cooling.

[0003] At present, the cooling system of engineering machinery engines is generally divided into two forms. One is the engine direct air cooling form, which is mainly composed of cooling fans, radiators and other components. The cooling fan is directly driven by the engine with a fixed speed ratio pulley drive; the other is an independent cooling control form, which is mostly driven by a hydraulic motor to cool the fan. However, when adjusting the temperature of the engine coolant, it is mostly a linear or monotonic curve control form, such as Figure 1 and Figure 2 As shown, in the coordinate system of the figure, the horizontal axis represents the engine outlet water temperature T (in degrees Celsius (℃)), the vertical axis represents the cooling fan speed N (in revolutions per minute (r / min)), t is the engine outlet water lower limit control temperature, t is generally set to about 82℃, t' is the engine outlet water upper limit control temperature, t' is generally set to 98℃, Nmin is the minimum cooling fan speed, Nmin is generally (400-500) r / min, Nmax is the maximum cooling fan speed, Nmax is set to the maximum value that the fan can reach and meets the noise and power consumption indicators. The curve in the figure shows that when the engine outlet water temperature is lower than t, the cooling fan runs at the minimum speed Nmin, when the engine outlet water temperature is between t and t', the cooling fan speed N increases linearly or monotonically with the increase of the engine outlet water temperature T, and when the engine outlet water temperature T reaches t' and above, the cooling fan runs at the maximum speed Nmax.

[0004] However, the existing technology cannot adaptively adjust the fan speed according to the change of engine thermal load caused by the working environment or working conditions of the engineering machinery, which reduces the efficiency of the engine system. In addition, the control accuracy is not high under different working conditions, the control efficiency is low, and the energy-saving effect is not ideal. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an intelligent heat dissipation control device and method to solve the problem that engineering machinery cannot adaptively adjust the heat dissipation effect of the power system according to changes in the operating environment or working conditions, thereby improving control accuracy and control efficiency, increasing engine efficiency and reducing power consumption.

[0006] To achieve the above object, the present invention is implemented by adopting the following technical solutions: In a first aspect, the present invention provides an intelligent heat dissipation control method, comprising the following steps: Obtain engine water outlet temperature, ambient temperature, engine speed and torque; If the engine water outlet temperature T is lower than the engine water outlet lower limit control temperature T0, the cooling fan is controlled not to run; If the engine water outlet temperature T is greater than the engine water outlet lower limit control temperature T0, and less than the coolant temperature T1 when the engine thermostat is fully open, the cooling fan is controlled to run at idle speed; If the engine water outlet temperature T is greater than the coolant temperature T1 when the engine thermostat is fully opened, and less than the engine water outlet upper limit control temperature T2, the required cooling fan control speed N' is calculated according to the ambient temperature, engine speed and torque, and the cooling fan is controlled to operate at the required cooling fan control speed N'; If the engine water outlet temperature T is greater than the engine water outlet upper limit control temperature T2, the required cooling fan control speed N' is calculated according to the ambient temperature, engine speed and torque, and the cooling fan is controlled to operate at the maximum speed.

[0007] Further, if the engine water outlet temperature T is greater than the coolant temperature T1 when the engine thermostat is fully opened, and less than the engine water outlet upper limit control temperature T2, the required cooling fan control speed N' is calculated according to the ambient temperature, the engine speed and the torque, and the cooling fan is controlled to operate at the required cooling fan control speed N', including: If the engine outlet water temperature T is within the target temperature range, the cooling fan is controlled to maintain the current speed; If the engine water outlet temperature T is greater than the coolant temperature T1 when the engine thermostat is fully open, and less than the engine water outlet upper limit control temperature T2, and the engine water outlet temperature T is not within the target temperature range, the estimated engine heat dissipation is calculated based on the received ambient temperature, engine speed and torque; the required cooling fan control speed N' is obtained based on the estimated engine heat dissipation.

[0008] Further, the estimated engine heat dissipation is calculated based on the received ambient temperature, engine speed and torque, including: Obtain the engine model, and obtain engine performance data according to the engine model; The engine performance data is a relationship fitting formula of the ambient temperature-engine speed-engine torque-engine heat dissipation data of the current model engine, obtained through bench testing; An estimated engine heat dissipation is calculated based on the ambient temperature, engine speed and torque, and engine performance data.

[0009] Further, obtaining the required cooling fan control speed N' according to the estimated engine heat dissipation includes: Obtain engine speed, torque, ambient temperature, throttle opening and engine water inlet temperature; The estimated engine heat dissipation, engine speed, torque, throttle opening, ambient temperature, engine water outlet temperature and transmitter water inlet temperature are used as inputs of the black box model formed by AI training to obtain the corresponding required cooling fan control speed N'; The black box model is built based on the reinforcement learning algorithm.

[0010] Furthermore, the target temperature range is within a range of 0.5° above and below the water outlet temperature Tb when the engine is set to be in the optimal working state.

[0011] Furthermore, the temperature limit relationship is: The engine water outlet lower limit control temperature T0 is less than the coolant temperature T1 when the engine thermostat is fully open and the engine water outlet temperature Tb is less than the engine water outlet upper limit control temperature T2.

[0012] Furthermore, the lower limit control temperature T0 of the engine water outlet is 82°C; The coolant temperature T1 when the engine thermostat is fully open is 92°C; When the engine is in the best working state, the water outlet temperature Tb is 95°C; The upper limit control temperature T2 of the engine water outlet is 98℃.

[0013] Furthermore, the method further comprises: Get the transmitter inlet water temperature; If the transmitter inlet water temperature is higher than a high temperature threshold or lower than a low temperature threshold, an alarm signal is generated and output.

[0014] In a second aspect, the present invention provides an intelligent heat dissipation control device, including a sensor module, a controller, a cooling fan and a fan driving device; The cooling fan is used to dissipate heat for the engine and is connected to the controller via a fan driving device; The sensor module is connected to the controller and is used to collect the engine water inlet temperature, ambient temperature, engine speed and torque and transmit them to the controller; The controller is used to execute the method described in the first aspect according to the acquired engine water inlet temperature, ambient temperature, engine speed and torque, generate a control signal of the cooling fan and send it to the fan driving device.

[0015] Further, the sensor module includes an engine water inlet temperature sensor, an engine water outlet temperature sensor and an ambient temperature sensor; The engine water inlet temperature sensor is installed in the engine water inlet coolant pipeline and is used to collect the engine water inlet temperature; The engine outlet water temperature sensor is built in near the engine water jacket outlet and is used to collect the engine outlet water temperature; The ambient temperature sensor is installed in a light-proof part of the whole machine, away from the heat source of the whole vehicle, at a height of more than 1.5m from the ground, and is used to collect the ambient temperature.

[0016] Furthermore, the ambient temperature sensor is installed at an edge of the cab or the bottom of the vehicle body away from the engine.

[0017] Furthermore, the controller is an engine ECU, and the controller obtains the engine speed and torque through the engine CAN bus signal.

[0018] Furthermore, the controller is a dedicated controller independent of the engine ECU, and communicates with the engine ECU via a CAN bus to receive the engine speed and torque of the engine.

[0019] Furthermore, the cooling fan is rigidly mounted on the radiator.

[0020] The fan drive device is directly connected to the fan, and together they form a stepless speed-adjustable fan device. The above arrangement achieves the effect that the rigid installation avoids the interference of the movement of the fan and the radiator air guide cover due to relative vibration during the rotation of the fan. The fan drive device can be driven by an electric motor, and optionally, the fan drive can be driven by a hydraulic motor.

[0021] In a third aspect, the present invention provides an engineering machinery, comprising an engine and the intelligent heat dissipation control device as described in the second aspect.

[0022] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention classifies various working conditions by the engine outlet water temperature, thereby controlling the cooling fan to operate at different wind speeds. The present invention can intelligently control the fan speed according to the working environment and operating conditions of the engineering machinery, so that the engine can quickly reach a thermal equilibrium state, and the coolant temperature of the engine when reaching the thermal equilibrium state can be accurately controlled within a temperature range that can keep the engine in an optimal working state, thereby avoiding overcooling or overheating of the engine, further improving the working efficiency of the engine and reducing the fuel consumption of the entire machine.

[0023] 2. The present invention can adaptively control the fan in closed loop to be in non-operating, idling, precise control and maximum speed operation modes, thereby reducing the power consumption of the fan.

[0024] 3. The present invention has a simple structure and is easy to implement.

[0025] 4. The black box model has a self-iteration function. It can continuously enrich the training data set and conduct autonomous learning training based on the real-time data accumulation in different environments and working conditions, continuously correct the model and improve the accuracy and reliability of the model prediction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a linear control form of the prior art; Figure 2 It is a monotonic curve control form of the prior art; Figure 3 It is a schematic diagram of the intelligent heat dissipation control device of the present invention; Figure 4 It is a flow chart of the intelligent heat dissipation control method of the present invention.

[0027] In the figure, 1. controller; 2. radiator; 3. cooling fan; 4. fan drive device; 5. pipeline; 6. engine water inlet temperature sensor; 7. engine; 8. engine water outlet temperature sensor; 9. water pump; 10. ambient temperature sensor. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0029] Example 1 This embodiment provides an intelligent heat dissipation control method. Figure 4 As shown, the following steps are included: Obtain engine water outlet temperature, ambient temperature, engine 7 speed and torque; If the engine water outlet temperature T is lower than the engine water outlet lower limit control temperature T0, the cooling fan 3 is controlled not to run; If the engine water outlet temperature T is greater than the engine water outlet lower limit control temperature T0, and is less than the coolant temperature T1 when the engine 7 thermostat is fully open, the cooling fan 3 is controlled to run at idle speed; idle speed operation means that the cooling fan 33 runs at a speed of N0, and N0 is the lowest control speed of the cooling fan 33, which is defined here as the fan idle speed, and the recommended setting is 400r / min.

[0030] If the engine water outlet temperature T is greater than the coolant temperature T1 when the engine 7 thermostat is fully opened, and less than the engine water outlet upper limit control temperature T2, the required cooling fan 3 control speed N' is calculated according to the ambient temperature, the engine 7 speed and the torque, and the cooling fan 3 is controlled to operate at the required cooling fan 3 control speed N'; If the engine water outlet temperature T is greater than the engine water outlet upper limit control temperature T2, the required cooling fan 3 control speed N' is calculated according to the ambient temperature, engine 7 speed and torque, and the cooling fan 3 is controlled to operate at the maximum speed. The maximum speed operation means that the cooling fan 3 operates at the maximum wind speed value that can be achieved and meets the noise and power consumption indicators.

[0031] Specifically, if the engine water outlet temperature T is greater than the coolant temperature T1 when the engine 7 thermostat is fully opened, and less than the engine water outlet upper limit control temperature T2, the required cooling fan 3 control speed N' is calculated according to the ambient temperature, the engine 7 speed and the torque, and the cooling fan 3 is controlled to operate at the required cooling fan 3 control speed N', including: If the engine outlet water temperature T is within the target temperature range, the cooling fan 3 is controlled to maintain the current speed; If the engine water outlet temperature T is greater than the coolant temperature T1 when the engine 7 thermostat is fully open, and is less than the engine water outlet upper limit control temperature T2, and the engine water outlet temperature T is not within the target temperature range, the estimated heat dissipation of the engine 7 is calculated based on the received ambient temperature, engine 7 speed and torque; the required cooling fan 3 control speed N' is obtained based on the estimated engine 7 heat dissipation.

[0032] Specifically, the estimated heat dissipation of the engine 7 is calculated based on the received ambient temperature, the speed and torque of the engine 7, including: Obtain the model of the engine 7, and obtain the performance data of the engine 7 according to the engine model; The engine 7 performance data is a relationship fitting formula of the current model engine 7 ambient temperature-engine 7 speed-engine 7 torque-engine 7 heat dissipation data, which is obtained through bench testing; The estimated heat dissipation of the engine 7 is calculated based on the ambient temperature, the speed and torque of the engine 7 and the performance data of the engine 7.

[0033] Specifically, obtaining the required cooling fan 3 control speed N' according to the estimated heat dissipation of the engine 7 includes: Obtain engine 7 speed, torque, ambient temperature, throttle opening and engine water inlet temperature; The estimated heat dissipation of the engine 7, the speed of the engine 7, the torque, the throttle opening, the ambient temperature, the engine water outlet temperature and the transmitter water inlet temperature are used as the input of the black box model formed by AI training to obtain the corresponding required cooling fan 3 control speed N'.

[0034] The precise control operation mode in the present invention is that the controller 1 estimates the heat dissipation of the engine 7 according to the received ambient temperature signal, the engine 7 speed and torque signal, and the interpolation calculation based on the engine 7 performance data. The controller 1 calculates the required cooling fan 3 control speed according to the obtained heat dissipation and the black box model, so that the engine 7 can quickly reach a thermal equilibrium state, and the engine water outlet temperature of the engine 7 when reaching the thermal equilibrium state is precisely controlled within the temperature range that can keep the engine 7 in the best working state.

[0035] In the present invention, the required cooling fan 3 control speed is calculated based on the estimated heat dissipation, and is specifically calculated based on the obtained heat dissipation and the engine 7 working condition and state data (engine 7 speed, torque, throttle opening, ambient temperature, engine outlet water temperature) through the black box model formed by AI training. Each set of training data of the black box model consists of two parts, the input is the heat dissipation of the engine 7, the engine 7 speed, torque, throttle opening, ambient temperature, engine outlet water temperature, and the output is the corresponding cooling fan 3 speed. The black box model has a self-iteration function, and can continuously enrich the training data set and conduct autonomous learning training based on the real-time data accumulation in different environments and working conditions, continuously correct the model and improve the accuracy and reliability of the model prediction.

[0036] The black box model of this embodiment is constructed based on the reinforcement learning algorithm. The state of the reinforcement learning algorithm is the wind speed state of the cooling fan 3, the action of the reinforcement learning algorithm is the wind speed adjustment action of the cooling fan 3, and the reward value of the reinforcement learning algorithm is determined based on the total power output of the transmitter affected by the wind speed of the cooling fan 3.

[0037] Optionally, the black box model may also select a BP network model or a neural network model such as a vector machine, and may also achieve a corresponding effect.

[0038] The training of the black box model can be performed using a training set. The training set is obtained through experiments or historical data record collection and annotation, and is divided into a training set and a test set. After training, a trained black box model is obtained, thereby realizing the prediction of the required cooling fan 3 control speed N'.

[0039] Preferably, the target temperature range is within a range of 0.5° above and below the water outlet temperature Tb when the engine 7 is set to be in the optimal working state.

[0040] The temperature limit relationship is: engine water outlet lower limit control temperature T0<coolant temperature T1 when the engine 7 thermostat is fully open<water outlet temperature Tb when the engine 7 is in the best working state<engine water outlet upper limit control temperature T2.

[0041] Preferably, the engine water outlet lower limit control temperature T0 is 82°C; The coolant temperature T1 of engine 7 when the thermostat is fully open is 92°C; When the engine 7 is in the best working state, the outlet water temperature Tb is 95°C; The upper limit control temperature T2 of the engine water outlet is 98℃.

[0042] Preferably, the method further comprises: Get the transmitter inlet water temperature; If the transmitter inlet water temperature is higher than a high temperature threshold or lower than a low temperature threshold, an alarm signal is generated and output.

[0043] The method of this embodiment reads the inlet and outlet water temperature, speed, torque and ambient temperature of the engine 7 in real time, and cooperates with the fan driving device 4 to realize intelligent control of the cooling fan 3. The method adaptively controls the fan in closed loop mode, namely, non-operation, idling operation, precise control operation and maximum speed operation.

[0044] Embodiment 2: like Figure 3 As shown, this embodiment provides an intelligent heat dissipation control device, including a sensor module, a controller 1, a water pump 9, a radiator 2, a cooling fan 3, a fan driving device 4 and a pipeline 5.

[0045] The sensor module includes an engine water inlet temperature sensor 6, an engine water outlet temperature sensor 8, and an ambient temperature sensor 10. The engine water inlet temperature sensor 6 is not provided by the engine and needs to be configured separately and installed in the engine water inlet coolant pipeline 5. The engine water outlet temperature sensor 8 is provided by the engine and is built-in near the outlet of the engine water jacket. The ambient temperature sensor 10 is not provided by the engine and needs to be configured separately and installed in a light-proof part of the whole machine, away from the heat source of the whole vehicle, and at a height of more than 1.5m from the ground. The signal output ends of the temperature sensors are connected to the input ends of the controller.

[0046] The controller 1 is used to receive the sensor module signal and the engine 7 CAN bus signal, and send a control signal to the fan drive device 4. The output end of the controller 1 is connected to the control end of the fan drive device 4 through a control line. The controller 1 can be an engine ECU. Alternatively, the controller 1 can be a dedicated controller independent of the engine 7 ECU, and communicate with the engine 7 ECU through the CAN bus to receive the engine's torque, speed, and outlet water temperature signals.

[0047] The cooling fan 3 is rigidly mounted on the radiator 2, so that the movement interference between the fan and the radiator air guide cover due to relative vibration during the rotation of the fan can be avoided.

[0048] The fan driving device 4 is directly connected to the cooling fan 3, and together they form a stepless speed-adjustable fan device. The fan driving device 4 can be driven by an electric motor, and optionally, the fan driving device can be driven by a hydraulic motor.

[0049] As Figure 4 shown, a control method for an intelligent heat dissipation control device in this embodiment includes the following steps: Step 1: When the system is powered on, the engine 7 warms up, the vehicle starts to operate, the sensor module starts to work and continuously sends various temperature signals to the controller 1, and the controller 1 continuously receives the signals and executes a judgment program according to the engine coolant outlet temperature; Step 2: Define T0 as the lower limit control temperature of the engine coolant outlet (recommended to be set at 82 °C). If the engine coolant outlet temperature T < T0, the controller 1 controls the cooling fan 3 not to operate; Step 3: Define T1 as the coolant temperature when the engine 7 thermostat is fully open (generally 92 °C). If the engine coolant outlet temperature T ≥ T0 and T < T1, the controller 1 controls the cooling fan 3 to operate at the speed N0, and N0 is the lowest control speed of the cooling fan 3, defined here as the fan idle speed, recommended to be set at 400 r / min; Step 4: Define Tb as the coolant outlet temperature at the best working state of the engine 7 (slightly different for different engines, recommended to be set at 95 °C), and T2 as the upper limit control temperature of the engine coolant outlet (recommended to be set at 98 °C). If the engine coolant outlet temperature T is between T1 and T2 and T is not within the range of Tb ± 0.5 °C, go to Step 7; Step 5: If the engine coolant outlet temperature T is within the range of Tb ± 0.5 °C, go to Step 10; Step 6: If the engine coolant outlet temperature T ≥ T2, the controller 1 controls the cooling fan 3 to operate at the speed Nmax, and Nmax is the maximum value that the cooling fan 3 can reach and meets the noise and power consumption indicators, then go to Step 2; Step 7: The controller 1 starts the precise control operation mode. The controller 1 interpolates and calculates the estimated heat dissipation of the engine 7 based on the received ambient temperature signal, engine speed, and torque signal according to the engine 7 performance data; Step 8: The controller 1 calculates the required control speed N' of the cooling fan 3 according to the heat dissipation obtained in Step 7 and sends the speed signal to the fan drive device 4; Step 9: The fan drive device 4 controls the cooling fan 3 to operate at the speed N' and keeps it constant; Step 10: The cooling fan 3 keeps running at the current speed. If the engine coolant outlet temperature T changes and is not within the range of Tb ± 0.5 °C, go to Step 2; Step 11: The engine 7 shuts down, and the system is powered off and stops working.

[0050] The temperature limit relationship is T0 < T1 < Tb < T2.

[0051] The control speed N' of the cooling fan 3 in step eight is obtained by real-time calculation by the black box model based on the heat dissipation obtained in step seven, the engine speed, torque, throttle opening, ambient temperature data and the target temperature Tb read in real time.

[0052] The working process of the black box model is to read the current engine speed, torque, throttle opening, ambient temperature data and target temperature based on the obtained heat dissipation, and calculate the required cooling fan speed in real time.

[0053] The precise control operation mode in the present invention is that the controller estimates the engine heat dissipation based on the received ambient temperature signal, engine speed and torque signal, and interpolates the engine performance data. The controller calculates the required cooling fan control speed based on the obtained heat dissipation and the black box model, so that the engine can quickly reach a thermal equilibrium state, and the engine water outlet temperature when the engine reaches a thermal equilibrium state is precisely controlled within a temperature range that can keep the engine in an optimal working state.

[0054] In the present invention, the required cooling fan control speed is calculated based on the estimated heat dissipation, and is specifically calculated based on the obtained heat dissipation and the engine operating condition and status data (engine speed, torque, throttle opening, ambient temperature, engine water outlet temperature) through a black box model formed by AI training. Each set of training data of the black box model consists of two parts, the input is the engine heat dissipation, engine speed, torque, throttle opening, ambient temperature, engine water outlet temperature, and the output is the corresponding cooling fan speed. The black box model has a self-iteration function, and can continuously enrich the training data set and conduct autonomous learning training based on the real-time data accumulation in different environments and operating conditions, continuously correct the model and improve the accuracy and reliability of the model prediction.

[0055] The present invention connects the engine's own water outlet temperature sensor, as well as a separately configured engine water inlet temperature sensor and an ambient temperature sensor to a controller (which may be an engine ECU or separately configured). The controller can read the engine's water inlet and outlet temperature, speed, torque and ambient temperature in real time, and cooperate with a fan drive device to achieve intelligent control of the cooling fan.

[0056] The adaptive closed-loop control fan of the present invention is respectively in non-operation, idling operation, precise control operation and maximum speed operation modes.

[0057] Embodiment 3: This embodiment provides an engineering machine, including an engine and the intelligent heat dissipation control device as described in the second embodiment.

[0058] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0059] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0060] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0061] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An intelligent heat dissipation control method, characterized in that: The following steps are involved: Obtain engine water outlet temperature, ambient temperature, engine speed and torque; If the engine water outlet temperature T is lower than the engine water outlet lower limit control temperature T0, the cooling fan is controlled not to run; If the engine water outlet temperature T is greater than the engine water outlet lower limit control temperature T0, and less than the coolant temperature T1 when the engine thermostat is fully open, the cooling fan is controlled to run at idle speed; If the engine water outlet temperature T is greater than the coolant temperature T1 when the engine thermostat is fully opened, and less than the engine water outlet upper limit control temperature T2, the required cooling fan control speed N' is calculated according to the ambient temperature, engine speed and torque, and the cooling fan is controlled to operate at the required cooling fan control speed N'; If the engine water outlet temperature T is greater than the engine water outlet upper limit control temperature T2, the required cooling fan control speed N' is calculated according to the ambient temperature, engine speed and torque, and the cooling fan is controlled to operate at the maximum speed.

2. The intelligent heat dissipation control method according to claim 1, characterized in that: If the engine water outlet temperature T is greater than the coolant temperature T1 when the engine thermostat is fully open, and less than the engine water outlet upper limit control temperature T2, the required cooling fan control speed N' is calculated according to the ambient temperature, engine speed and torque, and the cooling fan is controlled to operate at the required cooling fan control speed N', including: If the engine outlet water temperature T is within the target temperature range, the cooling fan is controlled to maintain the current speed; If the engine water outlet temperature T is greater than the coolant temperature T1 when the engine thermostat is fully open, and less than the engine water outlet upper limit control temperature T2, and the engine water outlet temperature T is not within the target temperature range, the estimated engine heat dissipation is calculated based on the received ambient temperature, engine speed and torque; the required cooling fan control speed N' is obtained based on the estimated engine heat dissipation.

3. The intelligent heat dissipation control method according to claim 2, characterized in that: Calculates estimated engine heat dissipation based on received ambient temperature, engine speed, and torque, including: Obtain the engine model, and obtain engine performance data according to the engine model; The engine performance data is a relationship fitting formula of the ambient temperature-engine speed-engine torque-engine heat dissipation data of the current model engine, obtained through bench testing; An estimated engine heat dissipation is calculated based on the ambient temperature, engine speed and torque, and engine performance data.

4. The intelligent heat dissipation control method according to claim 2, characterized in that: Obtaining the required cooling fan control speed N' according to the estimated engine heat dissipation includes: Obtain engine speed, torque, ambient temperature, throttle opening and engine water inlet temperature; The estimated engine heat dissipation, engine speed, torque, throttle opening, ambient temperature, engine water outlet temperature and transmitter water inlet temperature are used as inputs of the black box model formed by AI training to obtain the corresponding required cooling fan control speed N'.

5. The intelligent heat dissipation control method according to claim 2, characterized in that: The target temperature range is within a range of 0.5° above and below the water outlet temperature Tb when the engine is set to be in the optimal working state.

6. The intelligent heat dissipation control method according to claim 2, characterized in that: The temperature limit relationship is: The engine water outlet lower limit control temperature T0 is less than the coolant temperature T1 when the engine thermostat is fully open and the engine water outlet temperature Tb is less than the engine water outlet upper limit control temperature T2.

7. The intelligent heat dissipation control method according to claim 6, characterized in that: The lower limit control temperature T0 of the engine water outlet is 82℃; The coolant temperature T1 when the engine thermostat is fully open is 92°C; When the engine is in the best working state, the water outlet temperature Tb is 95°C; The upper limit control temperature T2 of the engine water outlet is 98℃.

8. An intelligent heat dissipation control device, characterized in that: Includes a sensor module, a controller, and a cooling fan and a fan drive; The cooling fan is used to dissipate heat for the engine and is connected to the controller via a fan driving device; The sensor module is connected to the controller and is used to collect the engine water inlet temperature, ambient temperature, engine speed and torque and transmit them to the controller; The controller is used to execute the method described in any one of claims 1 to 7 according to the acquired engine water inlet temperature, ambient temperature, engine speed and torque, generate a control signal of the cooling fan and send it to the fan driving device.

9. The intelligent heat dissipation control device according to claim 8, characterized in that: The sensor module includes an engine water inlet temperature sensor, an engine water outlet temperature sensor and an ambient temperature sensor; The engine water inlet temperature sensor is installed in the engine water inlet coolant pipeline and is used to collect the engine water inlet temperature; The engine outlet water temperature sensor is built in near the engine water jacket outlet and is used to collect the engine outlet water temperature; The ambient temperature sensor is installed in a light-proof part of the whole vehicle, away from the heat source of the whole vehicle, at a height of more than 1.5m from the ground, and is used to collect the ambient temperature; The controller is an engine ECU, and the controller obtains the engine speed and torque through the engine CAN bus signal.

10. An engineering machine, comprising an engine and the intelligent heat dissipation control device according to any one of claims 8 to 9.

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