CN115788651A - Engine fan control method, device, equipment and storage medium - Google Patents
Engine fan control method, device, equipment and storage medium Download PDFInfo
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- CN115788651A CN115788651A CN202211372693.8A CN202211372693A CN115788651A CN 115788651 A CN115788651 A CN 115788651A CN 202211372693 A CN202211372693 A CN 202211372693A CN 115788651 A CN115788651 A CN 115788651A
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Abstract
The invention discloses a method, a device, equipment and a storage medium for controlling an engine fan, wherein the method obtains the torque of a retarder and the rotating speed of a transmission shaft, and calculates the power of the retarder through the torque of the retarder and the rotating speed of the transmission shaft; selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan rotating speed curve according to the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds; the current water temperature of the retarder is detected in real time, the rotating speed of the fan of the engine is adjusted according to the current water temperature and the preset retarder water temperature fan rotating speed curve, the rotating speed of the fan when the retarder works can be reduced, the fan noise is reduced while the normal work of the retarder is ensured, the control precision of the fan of the engine is improved, and a user is improved; the driving experience improves the speed and efficiency of the engine fan control.
Description
Technical Field
The invention relates to the technical field of vehicle fan control, in particular to a method, a device, equipment and a storage medium for controlling an engine fan.
Background
The working principle of the hydraulic retarder of the commercial vehicle is that kinetic energy of rotation of a transmission shaft is converted into heat energy to realize braking and deceleration of the vehicle, the oil temperature of the retarder is heated, heat of retarder oil is transferred to cooling liquid of an engine through a heat exchanger of the retarder, the heat energy is circularly dissipated through a cooling system, and if the heat cannot be dissipated timely, the oil temperature or the water temperature reaches a certain value and is limited.
The prior engine has small displacement and horsepower, the heat dissipation capacity of an engine cooling system is low, and a fan of the retarder can rotate fully once working, so that the use requirement of a user on the retarder can be ensured; along with the increase of the engine displacement and horsepower, the capacity of an engine cooling system is correspondingly increased, the performance of the retarder can be ensured without the full rotation of a fan under most conditions, but the noise is increased by about 3-8 decibels after the full rotation of the fan, and the noise of the fan directly influences the driving experience of a user.
Disclosure of Invention
The invention mainly aims to provide a method, a device, equipment and a storage medium for controlling an engine fan, and aims to solve the technical problems that in the prior art, the performance of a retarder is ensured, meanwhile, the fan noise is too high, and the driving experience of a user is poor.
In a first aspect, the present invention provides an engine fan control method, including the steps of:
obtaining the retarder torque and the transmission shaft rotating speed, and calculating to obtain the retarder power through the retarder torque and the transmission shaft rotating speed;
selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan rotating speed curve according to the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds;
and detecting the current water temperature of the retarder in real time, and adjusting the rotating speed of the fan of the engine according to the current water temperature and the preset water temperature fan rotating speed curve of the retarder.
Optionally, the obtaining a retarder torque and a transmission shaft speed, and calculating a retarder power through the retarder torque and the transmission shaft speed includes:
obtaining the torque of a retarder and the rotating speed of a transmission shaft;
calculating to obtain the retarder power according to the retarder torque and the transmission shaft rotating speed through the following formula:
P＝π*T*n/30000
wherein P is retarder power, pi is circumferential ratio, T is retarder torque, and n is transmission shaft rotating speed.
Optionally, the 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, where the preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds, and includes:
acquiring a control strategy of the water temperature of the retarder and the rotating speed of the fan corresponding to the power of the retarder according to a preset power strategy mapping relation;
and acquiring a corresponding preset retarder water temperature fan rotating speed curve from the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds.
Optionally, after obtaining the corresponding preset retarder water temperature fan speed curve from the control strategy, the engine fan control method further includes:
and acquiring a current brake gear and a current vehicle speed of an auxiliary brake handle, and correcting the rotating speed curve of the water temperature fan of the preset retarder according to the current brake gear and the current vehicle speed to obtain a corrected target curve.
Optionally, the detecting a current water temperature of the retarder in real time, and adjusting a fan speed of an engine according to the current water temperature and the preset retarder water temperature fan speed curve includes:
detecting the current water temperature of the retarder in real time according to a water temperature sensor of the retarder, and acquiring a fan rotating speed adjusting parameter corresponding to the current water temperature from a preset retarder water temperature fan rotating speed curve;
and regulating the rotating speed of the engine fan by using an Electronic Control Unit (ECU) of the engine according to the fan rotating speed regulating parameter.
Optionally, the adjusting the engine fan speed with an engine electronic control unit ECU according to the fan speed adjustment parameter includes:
acquiring the current engine speed, and adapting according to the fan speed adjusting parameter and the current engine speed through an engine Electronic Control Unit (ECU) to acquire a target fan speed value;
and controlling the rotating speed of the fan of the engine according to the target rotating speed value of the fan.
Optionally, after detecting the current water temperature of the retarder in real time and adjusting the rotation speed of the engine fan according to the current water temperature and the preset retarder water temperature fan rotation speed curve, the engine fan control method further includes:
when the work of the engine is detected, controlling the retarder to stop working;
and when the retarder is detected to work, exiting the current engine water temperature control fan strategy and entering the current retarder water temperature control strategy.
In a second aspect, to achieve the above object, the present invention further provides an engine fan control device, including:
the power calculation module is used for acquiring the retarder torque and the transmission shaft rotating speed and calculating to obtain the retarder power through the retarder torque and the transmission shaft rotating speed;
the curve determining module is used for selecting a corresponding control strategy according to the retarder power and determining a preset retarder water temperature fan rotating speed curve according to the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds;
and the fan adjusting module is used for detecting the current water temperature of the retarder in real time and adjusting the rotating speed of the engine fan according to the current water temperature and the preset retarder water temperature fan rotating speed curve.
In a third aspect, to achieve the above object, the present invention also proposes an engine fan control apparatus comprising: a memory, a processor, and an engine fan control program stored on the memory and executable on the processor, the engine fan control program configured to implement the steps of the engine fan control method as described above.
In a fourth aspect, to achieve the above object, the present invention further provides a storage medium having an engine fan control program stored thereon, wherein the engine fan control program, when executed by a processor, implements the steps of the engine fan control method as described above.
According to the engine fan control method, the retarder power is obtained through calculation of the retarder torque and the transmission shaft rotating speed by obtaining the retarder torque and the transmission shaft rotating speed; selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan rotating speed curve according to the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds; real-time detection retarder's current temperature, according to current temperature with predetermine retarder temperature fan rotational speed curve and adjust engine fan rotational speed, can reduce the fan rotational speed of retarder during operation, reduced the fan noise when guaranteeing normal work of retarder, promoted the precision of engine fan control, promoted user's driving experience, improved the speed and the efficiency of engine fan control.
Drawings
FIG. 1 is a schematic diagram of an apparatus architecture of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart diagram illustrating a first embodiment of a method for controlling an engine fan according to the present invention;
FIG. 3 is a flowchart illustrating a second embodiment of a method for controlling an engine fan according to the present invention;
FIG. 4 is a schematic flow chart diagram illustrating a third exemplary embodiment of a method for controlling an engine fan according to the present invention;
FIG. 5 is a schematic flow chart diagram illustrating a fourth embodiment of a method for controlling an engine fan according to the present invention;
FIG. 6 is a schematic flow chart diagram illustrating a fifth embodiment of a method for controlling an engine fan according to the present invention;
fig. 7 is a functional block diagram of the first embodiment of the engine fan control apparatus of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The solution of the embodiment of the invention is mainly as follows: calculating to obtain the retarder power through the retarder torque and the transmission shaft rotating speed by obtaining the retarder torque and the transmission shaft rotating speed; selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan rotating speed curve according to the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds; real-time detection retarder's current temperature, according to current temperature with predetermine retarder temperature fan rotational speed curve adjustment engine fan rotational speed, can reduce the fan rotational speed of retarder during operation, reduced the fan noise when guaranteeing that retarder normally works, promoted the precision of engine fan control, promoted user's driving experience, improved the speed and the efficiency of engine fan control, it is too big to have solved fan noise when guaranteeing retarder performance among the prior art, user's driving experience is relatively poor technical problem.
Referring to fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the apparatus 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. The communication bus 1002 is used to implement connection communication among 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, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., a Wi-Fi interface). The Memory 1005 may be a high-speed RAM Memory or a Non-Volatile Memory (Non-Volatile Memory), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration of the apparatus shown in fig. 1 is not intended to be limiting of the apparatus and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating device, a network communication module, a user interface module, and an engine fan control program.
The inventive apparatus invokes, via processor 1001, an engine fan control program stored in memory 1005 and performs the following operations:
obtaining retarder torque and transmission shaft rotating speed, and calculating to obtain retarder power through the retarder torque and the transmission shaft rotating speed;
selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan rotating speed curve according to the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds;
and detecting the current water temperature of the retarder in real time, and adjusting the rotating speed of the engine fan according to the current water temperature and the preset retarder water temperature fan rotating speed curve.
The inventive apparatus, by way of processor 1001, calls an engine fan control program stored in memory 1005, and also performs the following operations:
obtaining the torque of a retarder and the rotating speed of a transmission shaft;
calculating to obtain the retarder power according to the retarder torque and the transmission shaft rotating speed through the following formula:
P＝π*T*n/30000
wherein, P is retarder power, pi is circumferential rate, T is retarder torque, and n is transmission shaft rotating speed.
The inventive apparatus, by way of processor 1001, calls an engine fan control program stored in memory 1005, and also performs the following operations:
acquiring a control strategy of the water temperature of the retarder and the rotating speed of the fan corresponding to the power of the retarder according to a preset power strategy mapping relation;
and acquiring a corresponding preset retarder water temperature fan rotating speed curve from the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds.
The inventive apparatus, by way of processor 1001, calls an engine fan control program stored in memory 1005, and also performs the following operations:
and acquiring a current brake gear and a current vehicle speed of an auxiliary brake handle, and correcting the rotating speed curve of the water temperature fan of the preset retarder according to the current brake gear and the current vehicle speed to obtain a corrected target curve.
The inventive apparatus, by way of processor 1001, calls an engine fan control program stored in memory 1005, and also performs the following operations:
detecting the current water temperature of the retarder in real time according to a water temperature sensor of the retarder, and acquiring a fan rotating speed adjusting parameter corresponding to the current water temperature from a preset retarder water temperature fan rotating speed curve;
and regulating the rotating speed of the engine fan by using an Electronic Control Unit (ECU) of the engine according to the fan rotating speed regulating parameter.
The inventive apparatus, by way of processor 1001, calls an engine fan control program stored in memory 1005, and also performs the following operations:
acquiring the current engine speed, and adapting according to the fan speed adjusting parameter and the current engine speed through an engine Electronic Control Unit (ECU) to acquire a target fan speed value;
and controlling the rotating speed of the fan of the engine according to the target rotating speed value of the fan.
The inventive apparatus, by way of processor 1001, calls an engine fan control program stored in memory 1005, and also performs the following operations:
when the work of the engine is detected, controlling the retarder to stop working;
and when the retarder is detected to work, exiting the current engine water temperature control fan strategy and entering the current retarder water temperature control strategy.
According to the scheme, the retarder power is obtained through calculation of the retarder torque and the transmission shaft rotating speed by obtaining the retarder torque and the transmission shaft rotating speed; selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan rotating speed curve according to the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds; real-time detection retarder's current temperature, according to current temperature with predetermine retarder temperature fan rotational speed curve and adjust engine fan rotational speed, can reduce the fan rotational speed of retarder during operation, reduced the fan noise when guaranteeing normal work of retarder, promoted the precision of engine fan control, promoted user's driving experience, improved the speed and the efficiency of engine fan control.
Based on the hardware structure, the embodiment of the engine fan control method is provided.
Referring to fig. 2, fig. 2 is a flowchart illustrating a first embodiment of a method for controlling an engine fan according to the present invention.
In a first embodiment, the engine fan control method includes the steps of:
and S10, obtaining the retarder torque and the transmission shaft rotating speed, and calculating to obtain the retarder power through the retarder torque and the transmission shaft rotating speed.
It should be noted that after the retarder torque and the transmission shaft rotation speed are obtained, the retarder power can be calculated and obtained through the retarder torque and the transmission shaft rotation speed.
Further, the step S10 specifically includes the following steps:
obtaining the torque of a retarder and the rotating speed of a transmission shaft;
calculating to obtain the retarder power according to the retarder torque and the transmission shaft rotating speed through the following formula:
P＝π*T*n/30000
wherein, P is retarder power, pi is circumferential rate, T is retarder torque, and n is transmission shaft rotating speed.
It can be understood that the rotating speed of the transmission shaft can be generally obtained by an instrument signal, the torque of the retarder can be generally obtained by a retarder signal, and then the power of the retarder is calculated through the formula, generally, the jumping of the rotating speed data of the transmission shaft is large, an average value needs to be taken, and generally, T = 3250% of the torque percentage required by the retarder.
And S20, selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan rotating speed curve according to the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds.
It can be understood that different retarder powers correspond to different retarder water temperature fan rotation speed control strategies, a preset retarder water temperature fan rotation speed curve is determined through the control strategies, and the preset retarder water temperature fan rotation speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotation speeds.
And S30, detecting the current water temperature of the retarder in real time, and adjusting the rotating speed of the fan of the engine according to the current water temperature and the preset retarder water temperature fan rotating speed curve.
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.
According to the scheme, the retarder power is obtained through calculation of the retarder torque and the transmission shaft rotating speed by obtaining the retarder torque and the transmission shaft rotating speed; selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan rotating speed curve according to the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds; real-time detection retarder's current temperature, according to current temperature with predetermine retarder temperature fan rotational speed curve and adjust engine fan rotational speed, can reduce the fan rotational speed of retarder during operation, reduced the fan noise when guaranteeing normal work of retarder, promoted the precision of engine fan control, promoted user's driving experience, improved the speed and the efficiency of engine fan control.
Further, fig. 3 is a schematic flow chart of a second embodiment of the engine fan control method of the present invention, and as shown in fig. 3, the second embodiment of the engine fan control method of the present invention is proposed based on the first embodiment, in this embodiment, the step S20 specifically includes the following steps:
and S21, acquiring a control strategy of the water temperature of the retarder and the rotating speed of the fan corresponding to the power of the retarder according to a preset power strategy mapping relation.
It should be noted that the preset power strategy mapping relationship is that different control strategies correspond to different retarder powers, and a control strategy of the retarder water temperature and the fan rotation speed corresponding to the retarder power can be obtained through the preset power strategy mapping relationship.
And S22, acquiring a corresponding preset retarder water temperature fan rotating speed curve from the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds.
It should be understood that a corresponding preset retarder water temperature fan speed curve may be obtained from the control strategy, where the preset retarder water temperature fan speed curve is a mapping curve corresponding to different retarder water temperatures and different fan speeds.
According to the scheme, the control strategy of the water temperature of the retarder and the rotating speed of the fan corresponding to the power of the retarder is obtained through the preset power strategy mapping relation; acquiring a corresponding preset retarder water temperature fan rotating speed curve from the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds; the mapping curve matched with the current retarder water temperature can be quickly obtained, the control precision of the engine fan is improved, the driving experience of a user is improved, and the speed and the efficiency of the control of the engine fan are improved.
Further, fig. 4 is a schematic flow chart of a third embodiment of the engine fan control method according to the present invention, and as shown in fig. 4, the third embodiment of the engine fan control method according to the present invention is proposed based on the second embodiment, and in this embodiment, after the step S22, the engine fan control method further includes the following steps:
and S23, acquiring a current brake gear and a current vehicle speed of the auxiliary brake handle, and correcting the rotating speed curve of the water temperature fan of the preset retarder according to the current brake gear and the current vehicle speed to obtain a corrected target curve.
It should be noted that after the current brake gear of the auxiliary brake handle and the current vehicle speed of the vehicle are obtained, the preset retarder water temperature fan rotation speed curve may be corrected according to the current brake gear and the current vehicle speed, so as to obtain a corrected target curve.
In the specific implementation, a driver operates an auxiliary brake handle, a Vehicle Electronic Control Unit (VECU) receives an auxiliary brake handle signal, and sends an auxiliary brake gear signal to an Electronic Control Unit (ECU) of a retarder and an engine ECU (Electronic Control Unit); the retarder ECU adjusts the retarder to a braking torque through adjusting the retarder oil pressure according to an auxiliary braking gear signal, the retarder calculates current retarder torque according to the pressure measured by the pressure sensor through closed-loop control of the pressure sensor, the retarder torque is sent to the engine ECU, and the retarder water temperature and the fan speed curve of different retarder powers can be corrected according to the change of the auxiliary braking gear and the vehicle speed.
In the concrete implementation, the retarder is manually operated to be divided into a constant speed gear and a braking gear, the retarder torque of the braking gear is fixed, the constant speed gear changes according to the vehicle speed, the retarder torque is automatically adjusted, the vehicle speed is ensured to be stable, and the retarder torque can be any value between 0% and 100%; when the speed of the low brake gear is very high, the power of the retarder reaches a high brake power value, at the moment, the speed of the retarder is high, natural wind is large, the brake power is gradually reduced along with the reduction of the speed of the retarder, and a lower fan can meet the use requirement and is controlled according to the low brake power; and if the vehicle speed is not reduced or is reduced slowly, the retarder can be always maintained at high power, and the fan is controlled according to a high-power curve.
According to the scheme, the current braking gear and the current vehicle speed of the auxiliary braking handle are obtained, the preset retarder water temperature fan rotating speed curve is corrected according to the current braking gear and the current vehicle speed, the corrected target curve is obtained, the corrected mapping curve can be quickly obtained, the accuracy of engine fan control is improved, the driving experience of a user is improved, and the speed and the efficiency of the engine fan control are improved.
Further, fig. 5 is a schematic flow chart of a fourth embodiment of the engine fan control method according to the present invention, and as shown in fig. 5, the fourth embodiment of the engine fan control method according to the present invention is proposed based on the first embodiment, in this embodiment, the step S30 specifically includes the following steps:
and S31, detecting the current water temperature of the retarder in real time according to the water temperature sensor of the retarder, and acquiring a fan rotating speed adjusting parameter corresponding to the current water temperature from the preset retarder water temperature fan rotating speed curve.
It should be noted that the current water temperature of the retarder can be detected in real time by a water temperature sensor arranged at a retarder connector, and a fan speed adjusting parameter corresponding to the current water temperature is obtained from the preset retarder water temperature fan speed curve.
And step S32, regulating the rotating speed of the engine fan by using an Electronic Control Unit (ECU) of the engine according to the fan rotating speed regulating parameter.
It will be appreciated that the engine fan speed is regulated by the fan speed regulation parameter using the engine electronic control unit ECU.
In the concrete implementation, a retarder water temperature signal is added, and the rotating speed of the fan is adjusted according to the retarder water temperature, wherein the higher the retarder water temperature is, the higher the rotating speed of the fan is; when the rotating speed of the engine is low, the water temperature of the retarder rises quickly, and at the moment, the fan needs to be rotated as soon as possible; when the rotating speed of the engine is high, the water temperature of the retarder slowly rises, and the rotating speed of the fan is allowed to slowly increase; when the retarder does not work, the heat generated by the engine is related to the rotating speed of the engine, and the engine ECU controls the rotating percentage of the fan according to the water temperature of the engine to ensure the performance of the engine; the heat generated by the retarder is irrelevant to the rotating speed of the engine, the heat dissipation capacity is relevant to the rotating speed of the fan, and the rotating speed of the fan is controlled according to the water temperature of the retarder and is irrelevant to the rotating speed of the engine. When the rotating speed of the engine is low, such as 1000rpm, the rotating speed of the fan and the rotating speed of the engine have a certain speed ratio, the rotating speed of the fan is up to 1200rpm, the water temperature of the retarder is 94 ℃, the rotating speed of the fan is required to be 1200rpm, the fan rotates fully, and if the water temperature of the retarder is continuously increased, the rotating speed of the fan is maintained at 1200rpm and the fan keeps rotating fully; when the rotating speed of the engine is high, such as 2000rpm, the highest rotating speed of the fan is 2400rpm, when the water temperature is 94 ℃, the rotating speed of the fan is 1200rpm, the duty ratio is 50%, the rotating speed of the fan is gradually increased along with the increase of the water temperature, when the water temperature of the retarder is 100 ℃, the rotating speed of the fan is 2000rpm, when the water temperature reaches 105 ℃, the rotating speed of the fan is 2400rpm, and the fan rotates fully; when the rotating speed of the engine is low, the engine can rotate fully at once, the heat dissipation capacity is improved, the engine can rotate fully in time, and the noise of the fan is not high. When the rotating speed of the engine is higher, the duty ratio of the fan is generally less than 60%, so that the noise of the fan can be greatly reduced; increasing the rotating speed of a transmission shaft (instrument signal), calculating the power of the retarder with the torque of the retarder (retarder signal), and determining a specific water temperature and fan rotating speed curve according to the heat dissipation capacity of the whole vehicle; when the retarder power is small, the rotating speed of the fan rotates late, the highest rotating speed is low, the condition of braking power is guaranteed, and the rotating speed of the fan is reduced as much as possible; when the power is larger, the fan rotates earlier, the highest rotating speed is higher, the water temperature of the retarder can be controlled when the power is larger, and the performance of the retarder is guaranteed.
Further, the step S32 specifically includes the following steps:
acquiring the current engine speed, and adapting according to the fan speed adjusting parameter and the current engine speed through an engine Electronic Control Unit (ECU) to acquire a target fan speed value;
and controlling the rotating speed of the fan of the engine according to the target rotating speed value of the fan.
It can be understood that after the current engine speed is obtained, the current engine speed can be adapted to the fan speed adjusting parameter through an engine electronic control unit ECU, a target fan speed value can be obtained, and the fan of the engine is subjected to speed control according to the target fan speed value.
In the concrete implementation, a water temperature sensor is arranged at a water outlet of the retarder, when the water temperature of the retarder exceeds 100 ℃, the retarder ECU starts to gradually limit the torque, and the retarder ECU can send a retarder water temperature message to the engine ECU according to the requirement; the output shaft of the gearbox is provided with a rotating speed sensor, an instrument sends a rotating speed signal of the transmission shaft to the engine ECU according to the sensor, and the instrument calculates the vehicle speed according to the rotating speed of the transmission shaft, the calibrated rear axle speed ratio and the radius of the tire and sends a vehicle speed signal to the engine ECU; according to a torque signal of the retarder ECU, when the retarder works, the engine water temperature control fan strategy is quitted, and the strategy of controlling the water temperature according to the retarder is entered; the engine ECU calculates the braking power of the retarder according to a torque signal of the retarder ECU and a transmission shaft rotating speed signal of an instrument, determines which power curve is adopted according to an auxiliary braking gear signal of the VECU and a vehicle speed signal change condition of the instrument, determines the rotating speed of the fan according to a retarder water temperature signal, sends an instruction to the fan by the engine ECU, adjusts the rotating speed of the fan, feeds the current rotating speed of the fan back to the engine ECU by the engine, and controls the rotating speed of the fan in a closed loop mode in real time.
According to the scheme, the current engine rotating speed is obtained, and the target fan rotating speed value is obtained through the adaptation of the engine electronic control unit ECU according to the fan rotating speed adjusting parameter and the current engine rotating speed; according to the target fan rotating speed value, the rotating speed of the fan of the engine is controlled, the rotating speed of the fan during the work of the retarder can be reduced, the noise of the fan is reduced while the normal work of the retarder is guaranteed, the control precision of the fan of the engine is improved, the driving experience of a user is improved, and the speed and the efficiency of the fan of the engine are improved.
Further, fig. 6 is a schematic flowchart of a fifth embodiment of the engine fan control method according to the present invention, and as shown in fig. 6, the fifth embodiment of the engine fan control method according to the present invention is proposed based on the first embodiment, and in this embodiment, after step S30, the engine fan control method further includes the following steps:
and step S40, when the engine is detected to work, controlling the retarder to stop working.
It should be noted that, when the engine is detected to be operated, the retarder may be controlled to be out of operation.
And S50, when the retarder is detected to work, exiting the current engine water temperature control fan strategy and entering the current retarder water temperature control strategy.
It should be understood that when the operation of the retarder is detected, the engine water temperature control strategy is exited, and the retarder water temperature control strategy is entered.
In the concrete implementation, the retarder can be withdrawn from working as long as the accelerator is stepped on to work, the retarder and the engine work have a mutual exclusion relation, the engine water temperature control fan strategy is withdrawn as long as the retarder works, and the engine fan is controlled by the water temperature of the retarder.
According to the scheme, when the work of the engine is detected, the retarder is controlled to quit working; when the retarder is detected to work, the current engine water temperature control fan strategy is exited, the current retarder water temperature control strategy is entered, the strategy switching can be rapidly carried out, the driving experience of a user is improved, and the speed and the efficiency of engine fan control are improved.
Correspondingly, the invention further provides an engine fan control device.
Referring to fig. 7, fig. 7 is a functional block diagram of a first embodiment of the engine fan control apparatus of the present invention.
In a first embodiment of the engine fan control apparatus of the present invention, the engine fan control apparatus includes:
and the power calculation module 10 is configured to obtain a retarder torque and a transmission shaft rotation speed, and calculate to obtain a retarder power through the retarder torque and the transmission shaft rotation speed.
And the curve determining module 20 is configured to select a corresponding control strategy according to the retarder power, and determine a preset retarder water temperature fan rotation speed curve according to the control strategy, where the preset retarder water temperature fan rotation speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotation speeds.
And the fan adjusting module 30 is used for detecting the current water temperature of the retarder in real time and adjusting the rotating speed of the engine fan according to the current water temperature and the preset retarder water temperature fan rotating speed curve.
The power calculation module 10 is further configured to obtain a retarder torque and a transmission shaft rotation speed;
calculating to obtain the retarder power according to the retarder torque and the transmission shaft rotating speed through the following formula:
P＝π*T*n/30000
wherein, P is retarder power, pi is circumferential rate, T is retarder torque, and n is transmission shaft rotating speed.
The curve determining module 20 is further configured to obtain a control strategy of the water temperature of the retarder and the fan rotation speed corresponding to the power of the retarder according to a preset power strategy mapping relationship; and acquiring a corresponding preset retarder water temperature fan rotating speed curve from the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds.
The curve determining module 20 is further configured to obtain a current brake gear and a current vehicle speed of the auxiliary brake handle, and modify the preset retarder water temperature fan rotation speed curve according to the current brake gear and the current vehicle speed to obtain a modified target curve.
The fan adjusting module 30 is further configured to detect a current water temperature of the retarder in real time according to the water temperature sensor of the retarder, and acquire a fan speed adjusting parameter corresponding to the current water temperature from the preset retarder water temperature fan speed curve; and regulating the rotating speed of the engine fan by using an Electronic Control Unit (ECU) of the engine according to the fan rotating speed regulating parameter.
The fan adjusting module 30 is further configured to obtain a current engine speed, and obtain a target fan speed value by adapting, through an engine electronic control unit ECU, according to the fan speed adjusting parameter and the current engine speed; and controlling the rotating speed of the fan of the engine according to the target rotating speed value of the fan.
The fan adjusting module 30 is further configured to control the retarder to exit from operation when the operation of the engine is detected; and when the retarder is detected to work, exiting the current engine water temperature control fan strategy and entering the current retarder water temperature control strategy.
The steps implemented by the functional modules of the engine fan control device can refer to the embodiments of the engine fan control method of the present invention, and are not described herein again.
Furthermore, an embodiment of the present invention further provides a storage medium having an engine fan control program stored thereon, where the engine fan control program, when executed by a processor, implements the following operations:
obtaining the retarder torque and the transmission shaft rotating speed, and calculating to obtain the retarder power through the retarder torque and the transmission shaft rotating speed;
selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan rotating speed curve according to the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds;
and detecting the current water temperature of the retarder in real time, and adjusting the rotating speed of the engine fan according to the current water temperature and the preset retarder water temperature fan rotating speed curve.
Further, the engine fan control program when executed by the processor further performs the following:
obtaining the torque of a retarder and the rotating speed of a transmission shaft;
calculating to obtain the retarder power according to the retarder torque and the transmission shaft rotating speed through the following formula:
P＝π*T*n/30000
wherein, P is retarder power, pi is circumferential rate, T is retarder torque, and n is transmission shaft rotating speed.
Further, the engine fan control program when executed by the processor further performs the following:
acquiring a control strategy of the water temperature of the retarder and the rotating speed of the fan corresponding to the power of the retarder according to a preset power strategy mapping relation;
and acquiring a corresponding preset retarder water temperature fan rotating speed curve from the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds.
Further, the engine fan control program when executed by the processor further performs the following:
and acquiring a current brake gear and a current vehicle speed of an auxiliary brake handle, and correcting the rotating speed curve of the water temperature fan of the preset retarder according to the current brake gear and the current vehicle speed to obtain a corrected target curve.
Further, the engine fan control program when executed by the processor further performs the following:
detecting the current water temperature of the retarder in real time according to a water temperature sensor of the retarder, and acquiring a fan rotating speed adjusting parameter corresponding to the current water temperature from a preset retarder water temperature fan rotating speed curve;
and regulating the rotating speed of the engine fan by using an Electronic Control Unit (ECU) of the engine according to the fan rotating speed regulating parameter.
Further, the engine fan control program when executed by the processor further performs the following:
acquiring the current engine speed, and adapting according to the fan speed adjusting parameter and the current engine speed through an engine Electronic Control Unit (ECU) to acquire a target fan speed value;
and controlling the rotating speed of the fan of the engine according to the target rotating speed value of the fan.
Further, the engine fan control program when executed by the processor further performs the following:
when the work of the engine is detected, controlling the retarder to stop working;
and when the retarder is detected to work, exiting the current engine water temperature control fan strategy and entering the current retarder water temperature control strategy.
According to the scheme, the retarder power is obtained through calculation of the retarder torque and the transmission shaft rotating speed by obtaining the retarder torque and the transmission shaft rotating speed; selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan rotating speed curve according to the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds; real-time detection the current temperature of retarber, according to current temperature with predetermine retarber temperature fan rotational speed curve and adjust engine fan rotational speed, can reduce the fan speed of retarber during operation, reduced the fan noise when guaranteeing that the retarber normally works, promoted the precision of engine fan control, promoted user's driving experience, improved the speed and the efficiency of engine fan control.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An engine fan control method, characterized by comprising:
obtaining the retarder torque and the transmission shaft rotating speed, and calculating to obtain the retarder power through the retarder torque and the transmission shaft rotating speed;
selecting a corresponding control strategy according to the retarder power, and determining a preset retarder water temperature fan rotating speed curve according to the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds;
and detecting the current water temperature of the retarder in real time, and adjusting the rotating speed of the engine fan according to the current water temperature and the preset retarder water temperature fan rotating speed curve.
2. The engine fan control method of claim 1, wherein said obtaining a retarder torque and a drive shaft speed, and calculating a retarder power from the retarder torque and the drive shaft speed comprises:
obtaining the torque of a retarder and the rotating speed of a transmission shaft;
calculating to obtain the retarder power according to the retarder torque and the transmission shaft rotating speed through the following formula:
P＝π*T*n/30000
wherein, P is retarder power, pi is circumferential rate, T is retarder torque, and n is transmission shaft rotating speed.
3. The engine fan control method according to claim 1, wherein the 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, the preset retarder water temperature fan speed curve being a mapping curve corresponding to different retarder water temperatures and different fan speeds, comprises:
acquiring a control strategy of the water temperature of the retarder and the rotating speed of the fan corresponding to the power of the retarder according to a preset power strategy mapping relation;
and acquiring a corresponding preset retarder water temperature fan rotating speed curve from the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds.
4. The engine fan control method of claim 3, wherein after obtaining the corresponding preset retarder water temperature fan speed curve from the control strategy, the engine fan control method further comprises:
and acquiring a current brake gear and a current vehicle speed of an auxiliary brake handle, and correcting the rotating speed curve of the water temperature fan of the preset retarder according to the current brake gear and the current vehicle speed to obtain a corrected target curve.
5. The engine fan control method of claim 1, wherein the detecting a current water temperature of the retarder in real time and adjusting an engine fan speed according to the current water temperature and the preset retarder water temperature fan speed curve comprises:
detecting the current water temperature of the retarder in real time according to a water temperature sensor of the retarder, and acquiring a fan rotating speed adjusting parameter corresponding to the current water temperature from a preset retarder water temperature fan rotating speed curve;
and regulating the rotating speed of the engine fan by using an Electronic Control Unit (ECU) of the engine according to the fan rotating speed regulating parameter.
6. The engine fan control method of claim 5, wherein said adjusting engine fan speed with an engine Electronic Control Unit (ECU) based on said fan speed adjustment parameter comprises:
acquiring the current engine speed, and adapting according to the fan speed adjusting parameter and the current engine speed through an engine Electronic Control Unit (ECU) to acquire a target fan speed value;
and controlling the rotating speed of the fan of the engine according to the target rotating speed value of the fan.
7. The engine fan control method as claimed in claim 1, wherein said detecting a current water temperature of the retarder in real time, and after adjusting an engine fan speed according to the current water temperature and the preset retarder water temperature fan speed curve, the engine fan control method further comprises:
when the work of the engine is detected, controlling the retarder to stop working;
and when the retarder is detected to work, exiting the current engine water temperature control fan strategy and entering the current retarder water temperature control strategy.
8. An engine fan control apparatus, characterized by comprising:
the power calculation module is used for acquiring retarder torque and transmission shaft rotating speed and calculating the retarder power through the retarder torque and the transmission shaft rotating speed;
the curve determining module is used for selecting a corresponding control strategy according to the retarder power and determining a preset retarder water temperature fan rotating speed curve according to the control strategy, wherein the preset retarder water temperature fan rotating speed curve is a mapping curve corresponding to different retarder water temperatures and different fan rotating speeds;
and the fan adjusting module is used for detecting the current water temperature of the retarder in real time and adjusting the rotating speed of the engine fan according to the current water temperature and the preset retarder water temperature fan rotating speed curve.
9. An engine fan control apparatus, characterized by comprising: a memory, a processor, and an engine fan control program stored on the memory and executable on the processor, the engine fan control program configured to implement the steps of the engine fan control method of any of claims 1-7.
10. A storage medium having stored thereon an engine fan control program which, when executed by a processor, implements the steps of the engine fan control method according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211372693.8A CN115788651A (en) | 2022-11-03 | 2022-11-03 | Engine fan control method, device, equipment and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211372693.8A CN115788651A (en) | 2022-11-03 | 2022-11-03 | Engine fan control method, device, equipment and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115788651A true CN115788651A (en) | 2023-03-14 |
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ID=85435330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211372693.8A Pending CN115788651A (en) | 2022-11-03 | 2022-11-03 | Engine fan control method, device, equipment and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115788651A (en) |
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2022
- 2022-11-03 CN CN202211372693.8A patent/CN115788651A/en active Pending
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