Engine fan control method, device, equipment and storage medium

Abstract

The present invention discloses an engine fan control method, device, equipment and storage medium. The method obtains retarder torque and transmission shaft speed, and calculates retarder power through the retarder torque and the transmission shaft speed; selects a corresponding control strategy according to the retarder power, and determines a preset retarder water temperature fan speed curve according to the control strategy, wherein the preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds; detects the current water temperature of the retarder in real time, and adjusts the engine fan speed according to the current water temperature and the preset retarder water temperature fan speed curve, so as to reduce the fan speed when the retarder is working, reduce the fan noise while ensuring the normal operation of the retarder, improve the accuracy of engine fan control, and improve the user's driving experience, thereby improving the speed and efficiency of engine fan control.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle fan control, and in particular to an engine fan control method, device, equipment and storage medium. Background Art

[0002] The working principle of the commercial vehicle hydraulic retarder is to convert the kinetic energy of the drive shaft rotation into thermal energy to achieve vehicle braking deceleration, heat the retarder oil temperature, transfer the heat of the retarder oil to the engine coolant through the retarder heat exchanger, and dissipate the heat energy through the cooling system. If the heat cannot be dissipated in time, the oil temperature or water temperature will reach a certain value and the torque will be limited.

[0003] In the past, the engine displacement and horsepower were smaller, and the heat dissipation capacity of the engine cooling system was lower. The fan would rotate at full speed as soon as the retarder was working, which could meet the user's needs for the retarder. As the engine displacement and horsepower increased, the engine cooling system capacity also increased accordingly. In most cases, the retarder performance can be guaranteed without the fan rotating at full speed. However, the noise increases by about 3-8 decibels after the fan rotates at full speed, and the fan noise directly affects the user's driving experience. Summary of the invention

[0004] The main purpose of the present invention is to provide an engine fan control method, device, equipment and storage medium, aiming to solve the technical problem in the prior art that the fan noise is too loud and the user's driving experience is poor while ensuring the performance of the retarder.

[0005] In a first aspect, the present invention provides an engine fan control method, the engine fan control method comprising the following steps:

[0006] Obtaining the retarder torque and the transmission shaft speed, and calculating the retarder power through the retarder torque and the transmission shaft speed;

[0007] Selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan speed curve according to the control strategy, wherein the preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds;

[0008] The current water temperature of the retarder is detected in real time, and the engine fan speed is adjusted according to the current water temperature and the preset retarder water temperature fan speed curve.

[0009] Optionally, the obtaining of the retarder torque and the transmission shaft speed, and calculating the retarder power by the retarder torque and the transmission shaft speed, comprises:

[0010] Get the retarder torque and transmission shaft speed;

[0011] The retarder power is calculated according to the retarder torque and the transmission shaft speed by the following formula:

[0012] P=π*T*n / 30000

[0013] Among them, P is the retarder power, π is the pi, T is the retarder torque, and n is the transmission shaft speed.

[0014] Optionally, the corresponding control strategy is selected according to the retarder power, and a preset retarder water temperature fan speed curve is determined according to the control strategy, wherein the preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds, including:

[0015] Obtaining a control strategy for the retarder water temperature and fan speed corresponding to the retarder power according to a preset power strategy mapping relationship;

[0016] A corresponding preset retarder water temperature and fan speed curve is obtained from the control strategy, wherein the preset retarder water temperature and fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds.

[0017] Optionally, after obtaining the corresponding preset retarder water temperature fan speed curve from the control strategy, the engine fan control method further includes:

[0018] The current brake gear position and the current vehicle speed of the auxiliary brake handle are obtained, and the preset retarder water temperature fan speed curve is corrected according to the current brake gear position and the current vehicle speed to obtain a corrected target curve.

[0019] Optionally, the real-time detection of the current water temperature of the retarder and the adjustment of the engine fan speed according to the current water temperature and the preset retarder water temperature fan speed curve include:

[0020] The water temperature sensor of the retarder detects the current water temperature of the retarder in real time, and obtains the fan speed adjustment parameter corresponding to the current water temperature from the preset retarder water temperature fan speed curve;

[0021] The engine fan speed is adjusted using an engine electronic control unit ECU according to the fan speed adjustment parameter.

[0022] Optionally, adjusting the engine fan speed by using an engine electronic control unit ECU according to the fan speed adjustment parameter includes:

[0023] The current engine speed is obtained, and the engine electronic control unit ECU is adapted according to the fan speed adjustment parameter and the current engine speed to obtain a target fan speed value;

[0024] The speed of the fan of the engine is controlled according to the target fan speed value.

[0025] Optionally, after the current water temperature of the retarder is detected in real time and the engine fan speed is adjusted according to the current water temperature and the preset retarder water temperature fan speed curve, the engine fan control method further comprises:

[0026] When the engine is detected to be running, the retarder is controlled to stop working;

[0027] When it is detected that the retarder is working, the current engine water temperature control fan strategy is exited and the current retarder water temperature control strategy is entered.

[0028] In a second aspect, in order to achieve the above-mentioned object, the present invention further provides an engine fan control device, the engine fan control device comprising:

[0029] A power calculation module, used to obtain the retarder torque and the transmission shaft speed, and calculate the retarder power through the retarder torque and the transmission shaft speed;

[0030] A curve determination module, for selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan speed curve according to the control strategy, wherein the preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds;

[0031] The fan adjustment module is used to detect the current water temperature of the retarder in real time and adjust the engine fan speed according to the current water temperature and the preset retarder water temperature fan speed curve.

[0032] In a third aspect, in order to achieve the above-mentioned purpose, the present invention also proposes an engine fan control device, which includes: a memory, a processor, and an engine fan control program stored in the memory and executable on the processor, wherein the engine fan control program is configured to implement the steps of the engine fan control method as described above.

[0033] In a fourth aspect, to achieve the above-mentioned purpose, the present invention further proposes a storage medium, on which an engine fan control program is stored, and when the engine fan control program is executed by a processor, the steps of the engine fan control method as described above are implemented.

[0034] The engine fan control method proposed by the present invention obtains the retarder torque and the transmission shaft speed, and calculates the retarder power through the retarder torque and the transmission shaft speed; selects a corresponding control strategy according to the retarder power, and determines a preset retarder water temperature fan speed curve according to the control strategy, wherein the preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds; detects the current water temperature of the retarder in real time, and adjusts the engine fan speed according to the current water temperature and the preset retarder water temperature fan speed curve, so as to reduce the fan speed when the retarder is working, reduce the fan noise while ensuring the normal operation of the retarder, improve the accuracy of engine fan control, improve the user driving experience, and improve the speed and efficiency of engine fan control. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the device structure of the hardware operating environment involved in the embodiment of the present invention;

[0036] Figure 2 It is a flow chart of a first embodiment of an engine fan control method of the present invention;

[0037] Figure 3 It is a flow chart of a second embodiment of the engine fan control method of the present invention;

[0038] Figure 4 It is a flowchart of a third embodiment of the engine fan control method of the present invention;

[0039] Figure 5 It is a flowchart of a fourth embodiment of the engine fan control method of the present invention;

[0040] Figure 6 A schematic flow chart of a fifth embodiment of an engine fan control method according to the present invention;

[0041] Figure 7 It is a functional module diagram of the first embodiment of the engine fan control device of the present invention.

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0044] The solution of the embodiment of the present invention is mainly as follows: by acquiring the retarder torque and the transmission shaft speed, the retarder power is calculated by the retarder torque and the transmission shaft speed; the corresponding control strategy is selected according to the retarder power, and a preset retarder water temperature fan speed curve is determined according to the control strategy, and the preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds; the current water temperature of the retarder is detected in real time, and the engine fan speed is adjusted according to the current water temperature and the preset retarder water temperature fan speed curve, which can reduce the fan speed when the retarder is working, reduce the fan noise while ensuring the normal operation of the retarder, improve the accuracy of engine fan control, improve the user driving experience, and improve the speed and efficiency of engine fan control, and solve the technical problem in the prior art that the fan noise is too large while ensuring the retarder performance, and the user's driving experience is poor.

[0045] Reference Figure 1 , Figure 1 The figure is a schematic diagram of the device structure of the hardware operating environment involved in the embodiment of the present invention.

[0046] like Figure 1 As shown, the device may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed RAM memory, or it may be a stable memory (Non-Volatile Memory), such as a disk memory. The memory 1005 may optionally be a storage device independent of the aforementioned processor 1001.

[0047] Those skilled in the art will understand that Figure 1 The device structure shown in the figure does not constitute a limitation of the device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0048] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating device, a network communication module, a user interface module, and an engine fan control program.

[0049] The device of the present invention calls the engine fan control program stored in the memory 1005 through the processor 1001, and performs the following operations:

[0050] Obtaining the retarder torque and the transmission shaft speed, and calculating the retarder power through the retarder torque and the transmission shaft speed;

[0051] Selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan speed curve according to the control strategy, wherein the preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds;

[0052] The current water temperature of the retarder is detected in real time, and the engine fan speed is adjusted according to the current water temperature and the preset retarder water temperature fan speed curve.

[0053] The device of the present invention calls the engine fan control program stored in the memory 1005 through the processor 1001, and also performs the following operations:

[0054] Get the retarder torque and transmission shaft speed;

[0055] The retarder power is calculated according to the retarder torque and the transmission shaft speed by the following formula:

[0056] P=π*T*n / 30000

[0057] Among them, P is the retarder power, π is the pi, T is the retarder torque, and n is the transmission shaft speed.

[0058] The device of the present invention calls the engine fan control program stored in the memory 1005 through the processor 1001, and also performs the following operations:

[0059] Obtaining a control strategy for the retarder water temperature and fan speed corresponding to the retarder power according to a preset power strategy mapping relationship;

[0060] A corresponding preset retarder water temperature and fan speed curve is obtained from the control strategy, wherein the preset retarder water temperature and fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds.

[0061] The device of the present invention calls the engine fan control program stored in the memory 1005 through the processor 1001, and also performs the following operations:

[0062] The current brake gear position and the current vehicle speed of the auxiliary brake handle are obtained, and the preset retarder water temperature fan speed curve is corrected according to the current brake gear position and the current vehicle speed to obtain a corrected target curve.

[0063] The device of the present invention calls the engine fan control program stored in the memory 1005 through the processor 1001, and also performs the following operations:

[0064] The water temperature sensor of the retarder detects the current water temperature of the retarder in real time, and obtains the fan speed adjustment parameter corresponding to the current water temperature from the preset retarder water temperature fan speed curve;

[0065] The engine fan speed is adjusted using an engine electronic control unit ECU according to the fan speed adjustment parameter.

[0066] The device of the present invention calls the engine fan control program stored in the memory 1005 through the processor 1001, and also performs the following operations:

[0067] The current engine speed is obtained, and the engine electronic control unit ECU is adapted according to the fan speed adjustment parameter and the current engine speed to obtain a target fan speed value;

[0068] The speed of the fan of the engine is controlled according to the target fan speed value.

[0069] The device of the present invention calls the engine fan control program stored in the memory 1005 through the processor 1001, and also performs the following operations:

[0070] When the engine is detected to be running, the retarder is controlled to stop working;

[0071] When it is detected that the retarder is working, the current engine water temperature control fan strategy is exited and the current retarder water temperature control strategy is entered.

[0072] Through the above scheme, the present embodiment obtains the retarder torque and the transmission shaft speed, and calculates the retarder power through the retarder torque and the transmission shaft speed; selects the corresponding control strategy according to the retarder power, and determines the preset retarder water temperature fan speed curve according to the control strategy, and the preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds; detects the current water temperature of the retarder in real time, and adjusts the engine fan speed according to the current water temperature and the preset retarder water temperature fan speed curve, which can reduce the fan speed when the retarder is working, reduce the fan noise while ensuring the normal operation of the retarder, improve the accuracy of engine fan control, improve the user driving experience, and improve the speed and efficiency of engine fan control.

[0073] Based on the above hardware structure, an embodiment of the engine fan control method of the present invention is proposed.

[0074] Reference Figure 2 , Figure 2 FIG. 1 is a flow chart of a first embodiment of an engine fan control method according to the present invention.

[0075] In a first embodiment, the engine fan control method includes the following steps:

[0076] Step S10, obtaining the retarder torque and the transmission shaft speed, and calculating the retarder power through the retarder torque and the transmission shaft speed.

[0077] It should be noted that after the retarder torque and the transmission shaft speed are obtained, the retarder power can be calculated through the retarder torque and the transmission shaft speed.

[0078] Furthermore, the step S10 specifically includes the following steps:

[0079] Get the retarder torque and transmission shaft speed;

[0080] The retarder power is calculated according to the retarder torque and the transmission shaft speed by the following formula:

[0081] P=π*T*n / 30000

[0082] Among them, P is the retarder power, π is the pi, T is the retarder torque, and n is the transmission shaft speed.

[0083] It can be understood that the transmission shaft speed can generally be obtained from the instrument signal, and the retarder torque can generally be obtained from the retarder signal, and then the retarder power is calculated by the above formula. Generally, the transmission shaft speed data jumps greatly, and it is necessary to take the average value. Generally, T = 3250*retarder required torque percentage.

[0084] Step S20, selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan speed curve according to the control strategy, wherein the preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds.

[0085] It can be understood that different retarder powers correspond to different retarder water temperature fan speed control strategies, and a preset retarder water temperature fan speed curve is determined by the control strategy. The preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds.

[0086] Step S30, detecting the current water temperature of the retarder in real time, and adjusting the engine fan speed according to the current water temperature and the preset retarder water temperature fan speed curve.

[0087] It should be understood that by detecting the water temperature of the retarder, the current water temperature of the retarder can be obtained, and the engine fan speed can be quickly adjusted according to the current water temperature and the preset retarder water temperature fan speed curve.

[0088] Through the above scheme, the present embodiment obtains the retarder torque and the transmission shaft speed, and calculates the retarder power through the retarder torque and the transmission shaft speed; selects the corresponding control strategy according to the retarder power, and determines the preset retarder water temperature fan speed curve according to the control strategy, and the preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds; detects the current water temperature of the retarder in real time, and adjusts the engine fan speed according to the current water temperature and the preset retarder water temperature fan speed curve, which can reduce the fan speed when the retarder is working, reduce the fan noise while ensuring the normal operation of the retarder, improve the accuracy of engine fan control, improve the user driving experience, and improve the speed and efficiency of engine fan control.

[0089] Further, Figure 3 FIG. 1 is a flow chart of a second embodiment of the engine fan control method of the present invention. Figure 3 As shown, a second embodiment of the engine fan control method of the present invention is proposed based on the first embodiment. In this embodiment, step S20 specifically includes the following steps:

[0090] Step S21, obtaining a control strategy of the retarder water temperature and the fan speed corresponding to the retarder power according to a preset power strategy mapping relationship.

[0091] It should be noted that the preset power strategy mapping relationship is that different retarder powers correspond to different control strategies, and the control strategy of the retarder water temperature and the fan speed corresponding to the retarder power can be obtained through the preset power strategy mapping relationship.

[0092] Step S22, obtaining a corresponding preset retarder water temperature and fan speed curve from the control strategy, wherein the preset retarder water temperature and fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds.

[0093] It should be understood that a corresponding preset retarder water temperature and fan speed curve can be obtained from the control strategy, and the preset retarder water temperature and fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds.

[0094] Through the above scheme, this embodiment obtains the control strategy of the retarder water temperature and the fan speed corresponding to the retarder power through the preset power strategy mapping relationship; obtains the corresponding preset retarder water temperature and fan speed curve from the control strategy, and the preset retarder water temperature and fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds; can quickly obtain a mapping curve matching the current retarder water temperature, improve the accuracy of engine fan control, improve user driving experience, and improve the speed and efficiency of engine fan control.

[0095] Further, Figure 4 FIG. 1 is a flow chart of a third embodiment of the engine fan control method of the present invention. Figure 4 As shown, a third embodiment of the engine fan control method of the present invention is proposed based on the second embodiment. In this embodiment, after step S22, the engine fan control method further includes the following steps:

[0096] Step S23, obtaining the current brake gear position and the current vehicle speed of the auxiliary brake handle, and correcting the preset retarder water temperature fan speed curve according to the current brake gear position and the current vehicle speed to obtain a corrected target curve.

[0097] It should be noted that after obtaining the current brake gear of the auxiliary brake handle and the current speed of the current vehicle, the preset retarder water temperature fan speed curve can be corrected according to the current brake gear and the current speed to obtain the corrected target curve.

[0098] In a specific implementation, the driver operates the auxiliary brake handle, the vehicle electronic control unit (VECU) receives the auxiliary brake handle signal, and sends an auxiliary brake gear position signal to the retarder electronic control unit (ECU) and the engine ECU; the retarder ECU adjusts the retarder to the braking torque by adjusting the retarder oil pressure according to the auxiliary brake gear position signal, and performs closed-loop control through the pressure sensor. The retarder calculates the current retarder torque according to the pressure measured by the pressure sensor, and sends the retarder torque to the engine ECU. According to the auxiliary brake gear position and vehicle speed changes, the retarder water temperature and fan speed curves of different retarder powers can be corrected.

[0099] In the specific implementation, the manual operation of the retarder is divided into constant speed gear and braking gear. The retarder torque of the braking gear is fixed. The constant speed gear automatically adjusts the retarder torque according to the change of vehicle speed to ensure the stability of the vehicle speed. The retarder torque can be any value between 0-100%; in the low braking gear, when the vehicle speed is very high, the retarder power reaches the high braking power value. At this time, the vehicle speed is high and the natural wind is strong. As the vehicle speed decreases, the braking power gradually decreases, and the lower fan can also meet the use requirements and is controlled according to the low braking power; the braking gear is the maximum gear, when the vehicle speed is high, the power is large at this time. If the vehicle speed drops quickly, the braking power will also drop with the drop in speed, and the fan is controlled according to the low power curve. If the vehicle speed does not drop or drops slowly, it means that the retarder will always maintain high power, and the fan is controlled according to the high power curve.

[0100] Through the above scheme, this embodiment obtains the current brake gear position and the current vehicle speed of the auxiliary brake handle, corrects the preset retarder water temperature fan speed curve according to the current brake gear position and the current vehicle speed, and obtains the corrected target curve. The corrected mapping curve can be quickly obtained, thereby improving the accuracy of engine fan control, improving user driving experience, and improving the speed and efficiency of engine fan control.

[0101] Further, Figure 5 FIG. 4 is a flow chart of a fourth embodiment of an engine fan control method according to the present invention. Figure 5 As shown, a fourth embodiment of the engine fan control method of the present invention is proposed based on the first embodiment. In this embodiment, step S30 specifically includes the following steps:

[0102] Step S31, detecting the current water temperature of the retarder in real time according to the water temperature sensor of the retarder, and obtaining the fan speed adjustment parameter corresponding to the current water temperature from the preset retarder water temperature fan speed curve.

[0103] It should be noted that the current water temperature of the retarder can be detected in real time by the water temperature sensor installed at the retarder joint, and the fan speed adjustment parameter corresponding to the current water temperature can be obtained from the preset retarder water temperature fan speed curve.

[0104] Step S32: adjusting the engine fan speed using the engine electronic control unit ECU according to the fan speed adjustment parameter.

[0105] It should be understood that the engine fan speed is adjusted by the engine electronic control unit ECU through the fan speed adjustment parameter.

[0106] In the specific implementation, the retarder water temperature signal is added, and the fan speed is adjusted according to the retarder water temperature. The higher the retarder water temperature, the higher the fan speed. When the engine speed is low, the retarder water temperature rises quickly, and the fan needs to be rotated as soon as possible. When the engine speed is high, the retarder water temperature rises slowly, and the fan speed is allowed to increase slowly. When the retarder is not working and the engine is working, the heat generated by the engine is related to the engine speed, and the engine ECU controls the fan rotation percentage according to the engine water temperature to ensure the engine performance. The heat generated by the retarder is not related to the engine speed, and the heat dissipation capacity is related to the fan speed. The fan speed is now controlled according to the retarder water temperature and has nothing to do with the engine speed. When the engine speed is low, such as 1000rpm, there is a certain speed ratio between the fan and the engine speed. Assuming that the maximum fan speed is 1200rpm, the retarder water temperature is 94℃, the fan speed requirement is 1200rpm, and the fan is already in full rotation. If the retarder water temperature continues to increase, the fan speed is maintained at 1200rpm and keeps full rotation; when the engine speed is high, such as 2000rpm, the maximum fan speed is 2400rpm. When the water temperature is 94℃, the fan speed is 1200rpm. At this time, the duty cycle is 50%. As the water temperature increases, the fan speed gradually increases. When the retarder water temperature is 100℃, the fan speed is 2000rpm. When the water temperature reaches 105℃, the fan speed is 2400rpm, and the fan is in full rotation; when the engine speed is low, it will immediately rotate at full speed to improve the heat dissipation capacity. At this time, it will rotate at full speed in time and the fan noise will not be high. When the engine speed is high, the fan duty cycle is generally less than 60%, which can greatly reduce fan noise; increase the transmission shaft speed (instrument signal) and the retarder torque (retarder signal) to calculate the retarder power, and determine the specific water temperature and fan speed curve according to the heat dissipation capacity of the vehicle; when the retarder power is small, the fan speed rotates later and the maximum speed is lower. To ensure the braking power, try to reduce the fan speed; when the power is large, the fan rotates earlier and the maximum speed is higher, ensuring that the retarder water temperature can be controlled when the power is large to ensure the retarder performance.

[0107] Furthermore, the step S32 specifically includes the following steps:

[0108] The current engine speed is obtained, and the engine electronic control unit ECU is adapted according to the fan speed adjustment parameter and the current engine speed to obtain a target fan speed value;

[0109] The speed of the fan of the engine is controlled according to the target fan speed value.

[0110] It is understandable that after obtaining the current engine speed, the engine electronic control unit ECU and the fan speed adjustment parameters can be adapted to obtain a target fan speed value, and the fan of the engine can be controlled according to the target fan speed value.

[0111] In the specific implementation, there is a water temperature sensor at the retarder water outlet. When the retarder water temperature exceeds 100℃, the retarder ECU begins to gradually limit the torque. The retarder ECU can send the retarder water temperature message to the engine ECU as required; the gearbox output shaft has a speed sensor, and the instrument sends the drive shaft speed signal to the engine ECU according to the sensor. The instrument calculates the vehicle speed according to the drive shaft speed, the calibrated rear axle speed ratio and the tire radius, and sends the engine ECU a start speed signal; the engine ECU exits the engine water temperature control fan strategy and enters the strategy of controlling the water temperature according to the retarder according to the torque signal of the retarder ECU when the retarder is working; the engine ECU calculates the retarder braking power according to the torque signal of the retarder ECU and the drive shaft speed signal of the instrument, and determines which power curve to use according to the auxiliary brake gear signal of the VECU and the change of the vehicle speed signal of the instrument. The engine ECU determines the fan speed according to the retarder water temperature signal, and the engine ECU sends a command to the fan to adjust the fan speed. The engine feeds back the current fan speed to the engine ECU, and the engine ECU will close the loop and control the fan speed in real time.

[0112] Through the above scheme, this embodiment obtains the current engine speed, and adapts the engine electronic control unit ECU according to the fan speed adjustment parameter and the current engine speed to obtain a target fan speed value; the fan speed of the engine is controlled according to the target fan speed value, which can reduce the fan speed when the retarder is working, reduce the fan noise while ensuring the normal operation of the retarder, improve the accuracy of engine fan control, improve the user driving experience, and improve the speed and efficiency of engine fan control.

[0113] Further, Figure 6 FIG. 5 is a flow chart of a fifth embodiment of an engine fan control method according to the present invention. Figure 6 As shown, a fifth embodiment of the engine fan control method of the present invention is proposed based on the first embodiment. In this embodiment, after step S30, the engine fan control method further includes the following steps:

[0114] Step S40: When it is detected that the engine is running, the retarder is controlled to stop working.

[0115] It should be noted that when the engine is detected to be running, the retarder can be controlled to stop working.

[0116] Step S50: when it is detected that the retarder is operating, exit the current engine water temperature control fan strategy and enter the current retarder water temperature control strategy.

[0117] It should be understood that when it is detected that the retarder is operating, the engine water temperature control strategy is exited and the retarder water temperature control strategy is entered.

[0118] In the specific implementation, as long as the accelerator is pressed and the engine is working, the retarder will stop working. There is a mutually exclusive relationship between the retarder and the engine. As long as the retarder is working, the engine water temperature control fan strategy will be exited, and the engine fan will be controlled by the retarder water temperature.

[0119] Through the above scheme, this embodiment controls the retarder to exit operation when the engine is detected to be operating; when the retarder is detected to be operating, the current engine water temperature control fan strategy is exited and the current retarder water temperature control strategy is entered. This allows for rapid strategy switching, thereby improving the user's driving experience and the speed and efficiency of engine fan control.

[0120] Accordingly, the present invention further provides an engine fan control device.

[0121] Reference Figure 7 , Figure 7 It is a functional module diagram of the first embodiment of the engine fan control device of the present invention.

[0122] In a first embodiment of the engine fan control device of the present invention, the engine fan control device comprises:

[0123] The power calculation module 10 is used to obtain the retarder torque and the transmission shaft speed, and calculate the retarder power through the retarder torque and the transmission shaft speed.

[0124] The curve determination module 20 is used to select a corresponding control strategy according to the retarder power, and determine a preset retarder water temperature fan speed curve according to the control strategy. The preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds.

[0125] The fan adjustment module 30 is used to detect the current water temperature of the retarder in real time, and adjust the engine fan speed according to the current water temperature and the preset retarder water temperature fan speed curve.

[0126] The power calculation module 10 is also used to obtain the retarder torque and the transmission shaft speed;

[0127] The retarder power is calculated according to the retarder torque and the transmission shaft speed by the following formula:

[0128] P=π*T*n / 30000

[0129] Among them, P is the retarder power, π is the pi, T is the retarder torque, and n is the transmission shaft speed.

[0130] The curve determination module 20 is also used to obtain a control strategy for the retarder water temperature and the fan speed corresponding to the retarder power according to a preset power strategy mapping relationship; obtain the corresponding preset retarder water temperature and fan speed curve from the control strategy, and the preset retarder water temperature and fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds.

[0131] The curve determination module 20 is also used to obtain the current brake gear position of the auxiliary brake handle and the current vehicle speed, and to correct the preset retarder water temperature fan speed curve according to the current brake gear position and the current vehicle speed to obtain a corrected target curve.

[0132] The fan adjustment module 30 is also used to detect the current water temperature of the retarder in real time according to the water temperature sensor of the retarder, obtain the fan speed adjustment parameter corresponding to the current water temperature from the preset retarder water temperature fan speed curve; and adjust the engine fan speed using the engine electronic control unit ECU according to the fan speed adjustment parameter.

[0133] The fan adjustment module 30 is also used to obtain the current engine speed, and adapt the fan speed adjustment parameter and the current engine speed through the engine electronic control unit ECU to obtain a target fan speed value; and control the speed of the engine fan according to the target fan speed value.

[0134] The fan regulating module 30 is also used to control the retarder to stop working when the engine is detected to be working; when the retarder is detected to be working, the current engine water temperature control fan strategy is exited and the current retarder water temperature control strategy is entered.

[0135] The steps implemented by the functional modules of the engine fan control device may refer to the various embodiments of the engine fan control method of the present invention, and will not be described in detail here.

[0136] In addition, an embodiment of the present invention further provides a storage medium, on which an engine fan control program is stored. When the engine fan control program is executed by a processor, the following operations are implemented:

[0137] Obtaining the retarder torque and the transmission shaft speed, and calculating the retarder power through the retarder torque and the transmission shaft speed;

[0138] Selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan speed curve according to the control strategy, wherein the preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds;

[0139] The current water temperature of the retarder is detected in real time, and the engine fan speed is adjusted according to the current water temperature and the preset retarder water temperature fan speed curve.

[0140] Furthermore, when the engine fan control program is executed by the processor, the following operations are also implemented:

[0141] Get the retarder torque and transmission shaft speed;

[0142] The retarder power is calculated according to the retarder torque and the transmission shaft speed by the following formula:

[0143] P=π*T*n / 30000

[0144] Among them, P is the retarder power, π is the pi, T is the retarder torque, and n is the transmission shaft speed.

[0145] Furthermore, when the engine fan control program is executed by the processor, the following operations are also implemented:

[0146] Obtaining a control strategy for the retarder water temperature and fan speed corresponding to the retarder power according to a preset power strategy mapping relationship;

[0147] A corresponding preset retarder water temperature and fan speed curve is obtained from the control strategy, wherein the preset retarder water temperature and fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds.

[0148] Furthermore, when the engine fan control program is executed by the processor, the following operations are also implemented:

[0149] The current brake gear position and the current vehicle speed of the auxiliary brake handle are obtained, and the preset retarder water temperature fan speed curve is corrected according to the current brake gear position and the current vehicle speed to obtain a corrected target curve.

[0150] Furthermore, when the engine fan control program is executed by the processor, the following operations are also implemented:

[0151] The water temperature sensor of the retarder detects the current water temperature of the retarder in real time, and obtains the fan speed adjustment parameter corresponding to the current water temperature from the preset retarder water temperature fan speed curve;

[0152] The engine fan speed is adjusted using an engine electronic control unit ECU according to the fan speed adjustment parameter.

[0153] Furthermore, when the engine fan control program is executed by the processor, the following operations are also implemented:

[0154] The current engine speed is obtained, and the engine electronic control unit ECU is adapted according to the fan speed adjustment parameter and the current engine speed to obtain a target fan speed value;

[0155] The speed of the fan of the engine is controlled according to the target fan speed value.

[0156] Furthermore, when the engine fan control program is executed by the processor, the following operations are also implemented:

[0157] When the engine is detected to be running, the retarder is controlled to stop working;

[0158] When it is detected that the retarder is working, the current engine water temperature control fan strategy is exited and the current retarder water temperature control strategy is entered.

[0159] Through the above scheme, the present embodiment obtains the retarder torque and the transmission shaft speed, and calculates the retarder power through the retarder torque and the transmission shaft speed; selects the corresponding control strategy according to the retarder power, and determines the preset retarder water temperature fan speed curve according to the control strategy, and the preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds; detects the current water temperature of the retarder in real time, and adjusts the engine fan speed according to the current water temperature and the preset retarder water temperature fan speed curve, which can reduce the fan speed when the retarder is working, reduce the fan noise while ensuring the normal operation of the retarder, improve the accuracy of engine fan control, improve the user driving experience, and improve the speed and efficiency of engine fan control.

[0160] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0161] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0162] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An engine fan control method, characterized in that: The engine fan control method comprises: Obtaining the retarder torque and the transmission shaft speed, and calculating the retarder power through the retarder torque and the transmission shaft speed; Selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan speed curve according to the control strategy, wherein the preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds; Detecting the current water temperature of the retarder in real time, and adjusting the engine fan speed according to the current water temperature and the preset retarder water temperature fan speed curve; Wherein, the corresponding control strategy is selected according to the retarder power, and a preset retarder water temperature fan speed curve is determined according to the control strategy. The preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds, including: Obtaining a control strategy for the retarder water temperature and fan speed corresponding to the retarder power according to a preset power strategy mapping relationship; A corresponding preset retarder water temperature and fan speed curve is obtained from the control strategy, wherein the preset retarder water temperature and fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds.

2. The engine fan control method according to claim 1, characterized in that: The obtaining of the retarder torque and the transmission shaft speed, and calculating the retarder power by the retarder torque and the transmission shaft speed, comprises: Get the retarder torque and transmission shaft speed; The retarder power is calculated according to the retarder torque and the transmission shaft speed by the following formula: P=π*T*n / 30000 Among them, P is the retarder power, π is the pi, T is the retarder torque, and n is the transmission shaft speed.

3. The engine fan control method according to claim 1, characterized in that: After obtaining the corresponding preset retarder water temperature fan speed curve from the control strategy, the engine fan control method further includes: The current brake gear position and the current vehicle speed of the auxiliary brake handle are obtained, and the preset retarder water temperature fan speed curve is corrected according to the current brake gear position and the current vehicle speed to obtain a corrected target curve.

4. The engine fan control method according to claim 1, characterized in that: The real-time detection of the current water temperature of the retarder and the adjustment of the engine fan speed according to the current water temperature and the preset retarder water temperature fan speed curve include: The water temperature sensor of the retarder detects the current water temperature of the retarder in real time, and obtains the fan speed adjustment parameter corresponding to the current water temperature from the preset retarder water temperature fan speed curve; The engine fan speed is adjusted using an engine electronic control unit ECU according to the fan speed adjustment parameter.

5. The engine fan control method according to claim 4, characterized in that: The method of adjusting the engine fan speed by using an engine electronic control unit ECU according to the fan speed adjustment parameter includes: The current engine speed is obtained, and the engine electronic control unit ECU is adapted according to the fan speed adjustment parameter and the current engine speed to obtain a target fan speed value; The speed of the fan of the engine is controlled according to the target fan speed value.

6. The engine fan control method according to claim 1, characterized in that: After the current water temperature of the retarder is detected in real time and the engine fan speed is adjusted according to the current water temperature and the preset retarder water temperature fan speed curve, the engine fan control method further includes: When the engine is detected to be running, the retarder is controlled to stop working; When it is detected that the retarder is working, the current engine water temperature control fan strategy is exited and the current retarder water temperature control strategy is entered.

7. An engine fan control device, characterized in that: The engine fan control device comprises: A power calculation module, used to obtain the retarder torque and the transmission shaft speed, and calculate the retarder power through the retarder torque and the transmission shaft speed; A curve determination module, for selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan speed curve according to the control strategy, wherein the preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds; A fan adjustment module, used for detecting the current water temperature of the retarder in real time, and adjusting the engine fan speed according to the current water temperature and the preset retarder water temperature fan speed curve; The curve determination module is also used to obtain a control strategy for the retarder water temperature and the fan speed corresponding to the retarder power according to a preset power strategy mapping relationship; obtain the corresponding preset retarder water temperature and fan speed curve from the control strategy, and the preset retarder water temperature and fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds.

8. An engine fan control device, characterized in that: The engine fan control device comprises: a memory, a processor, and an engine fan control program stored in the memory and executable on the processor, wherein the engine fan control program is configured to implement the steps of the engine fan control method according to any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium stores an engine fan control program, and when the engine fan control program is executed by the processor, the steps of the engine fan control method according to any one of claims 1 to 6 are implemented.

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