CN110761887A - Independent cooling system control system - Google Patents
Independent cooling system control system Download PDFInfo
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- CN110761887A CN110761887A CN201911065886.7A CN201911065886A CN110761887A CN 110761887 A CN110761887 A CN 110761887A CN 201911065886 A CN201911065886 A CN 201911065886A CN 110761887 A CN110761887 A CN 110761887A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
- F01P7/048—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using electrical drives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/14—Indicating devices; Other safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/14—Indicating devices; Other safety devices
- F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/08—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/02—Intercooler
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Abstract
The invention belongs to the technical field of development of control systems and models of independent cooling systems of engineering machinery and special vehicles, and particularly relates to a control system of an independent cooling system. The independent cooling system control system includes: the device comprises an input module, a calibration parameter setting module, a diagnosis module, a function management module, a rotating speed estimation module and an electromagnetic valve control module; according to the invention, through the division and design of the independent cooling system control model framework, the system function realization process is clear and smooth, the task definition of the sub-function module is clear, the code readability is high, the maintainability is good, the universality and modularization of the control system are greatly improved, and the development efficiency of the control system and the transportability of the control system are improved.
Description
Technical Field
The invention belongs to the technical field of development of control systems and models of independent cooling systems of engineering machinery and special vehicles, and particularly relates to a control system of an independent cooling system.
Background
With the continuous promotion of national energy conservation and emission reduction standards, the heat dissipation systems of engineering machinery and special vehicles are gradually converted from integrated heat dissipation systems into independent heat dissipation systems, the heat dissipation systems are generally composed of components such as a water radiator, an intercooler, a hydraulic oil radiator, a torque converter oil radiator, a hydraulic pump, a hydraulic motor, a fan, a control valve group, a sensor and a controller, the rotating speed of the fan is adjusted in real time by monitoring the inlet and outlet temperatures of the water radiator, the intercooler, the hydraulic oil radiator and the torque converter oil radiator, the dynamic link of the rotating speed of the fan according to the heat dissipation requirements of the vehicles is realized, and the energy conservation and emission reduction effects of the vehicles are effectively.
The engineering machinery and the special vehicle have the characteristics of multiple models, small batch and wide application range, so that great differences exist among vehicle types, and great difficulty is brought to the design of a control system and the actual vehicle calibration. However, the engineering machinery and the special vehicle have the characteristics of multiple models, small batch, large functional difference and the like, and each vehicle type needs to be developed repeatedly, no specific solution exists, and particularly the design of the software architecture of the independent heat dissipation control system is blank, so that a universal control system is needed, the modular design of the independent heat dissipation system is completed through strict definition of the control function and clear definition of the module function, the rapid development of the control system is realized, and the requirement of rapid development of the independent heat dissipation systems of different vehicles is met.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: how to provide a stand-alone cooling system control system.
(II) technical scheme
In order to solve the above technical problem, the present invention provides an independent cooling system control system, including: the device comprises an input module, a calibration parameter setting module, a diagnosis module, a function management module, a rotating speed estimation module and an electromagnetic valve control module; wherein the content of the first and second substances,
the input module is used for acquiring all sensor signals and control signals of the vehicle, preprocessing the sensor signals and the control signals and generating processed sensor signals and control signals;
the calibration parameter setting module is used for communicating with an upper computer, receiving a configuration file of the upper computer, and configuring preset thresholds of parameter groups related to the diagnosis module, the function management module, the rotating speed estimation module and the electromagnetic valve control module according to the configuration file;
the diagnostic module is used for receiving the sensor signals and the control signals, carrying out effectiveness diagnosis on the sensor signals and the control signals, generating a diagnosis result and transmitting the diagnosis result to the function management module, and transmitting fault codes corresponding to the diagnosis result to the output module;
the function management module includes: the automatic reversing device comprises a self-checking unit, an automatic reversing unit, a forced refrigerating unit and a program control unit;
the self-test unit is used for judging whether a sensor signal and a control signal from the input module and a diagnosis result from the diagnosis module are received or not, and judging that the self-test is normal under the condition that the sensor signal and the control signal from the input module are received and the diagnosis result is normal;
the automatic reversing unit is used for outputting a first electromagnetic valve driving instruction to the electromagnetic valve control module under the condition of normal self-checking, the electromagnetic valve control module executes reversing operation on the motor for controlling the fan, after the reversing operation is continued according to preset time, the electromagnetic valve control module drives the motor to recover the initial reversing operation, then the program control unit calls a preset threshold value of a parameter group and outputs the preset threshold value to the rotating speed estimation module, the rotating speed estimation module estimates the target rotating speed of the fan according to a sensor signal from the input module and the preset threshold value of the parameter group to generate a target rotating speed of the fan, the program control unit generates an electromagnetic valve target signal according to the target rotating speed of the fan, and generates a second electromagnetic valve driving instruction according to the comparison value of the electromagnetic valve target signal and a current state signal of the electromagnetic valve in the control signal and sends the second electromagnetic valve driving, the electromagnetic valve control module drives the motor to normally work at the target rotating speed of the fan;
in the normal working process of the motor, if the function management module receives a motor forward and reverse rotation signal in the control signal, the forced reverse rotation unit outputs a third electromagnetic valve driving instruction to the electromagnetic valve control module according to the motor forward and reverse rotation signal, and the electromagnetic valve control module performs forced reverse rotation on the motor;
in the normal working process of the motor, if the function management module receives a forced refrigeration signal in the control signal, the forced refrigeration unit outputs a fourth electromagnetic valve driving instruction to the electromagnetic valve control module according to the forced refrigeration signal, and the electromagnetic valve control module drives the motor to perform forced refrigeration on the heat exchanger;
the electromagnetic valve control module is an execution unit for controlling the rotating speed of the fan and is used for controlling relevant electromagnetic valves according to a first electromagnetic valve driving instruction, a second electromagnetic valve driving instruction, a third electromagnetic valve driving instruction and a fourth electromagnetic valve driving instruction for controlling the proportional electromagnetic valve and the switch electromagnetic valve so as to drive the motor.
Wherein, independent cooling system control system still includes: an output module;
the second electromagnetic valve driving instruction generated by the program control unit is also output to the output module;
the third electromagnetic valve driving instruction output by the forced reverse rotation unit is also output to an output module;
a fourth electromagnetic valve driving instruction output by the forced refrigeration unit is also output to an output module;
the output module is used for converting a second electromagnetic valve driving instruction, a third electromagnetic valve driving instruction and a fourth electromagnetic valve driving instruction into physical control quantities respectively to form electromagnetic valve driving display information; meanwhile, the fault code output by the diagnosis module is formed into a fault code signal; and the electromagnetic valve driving display information and the fault code information are uploaded to the whole vehicle, and the corresponding independent cooling system information display is carried out through the whole vehicle combination instrument.
The input module is used for preprocessing the sensor signals and the control signals and comprises the following steps: the sensor signals and the control signals are converted into signal specifications required by the function management module, the rotating speed estimation module and the diagnosis module, the sensor signals are subjected to noise reduction and filtering processing, physical quantities are converted according to engineering units, and the processed sensor signals and the processed control signals are generated.
Wherein the sensor signal comprises: fan speed signal, temperature signal.
Wherein the sensor signal further comprises: a filter alarm signal.
Wherein the temperature signal comprises: water temperature inlet temperature, water temperature outlet temperature, hydraulic oil inlet oil temperature, hydraulic oil outlet oil temperature, torque converter inlet oil temperature, torque converter outlet oil temperature, intercooler inlet temperature, and intercooler outlet temperature.
Wherein the control signal comprises: a forced refrigeration signal, a motor positive and negative rotation signal and an electromagnetic valve current state signal.
The preset threshold values of the parameter group comprise a water temperature inlet temperature threshold value, a hydraulic oil inlet oil temperature threshold value, a torque converter inlet oil temperature threshold value and an intercooler outlet temperature threshold value; a fan speed threshold; a fan reversal time threshold and a rotating speed threshold; the pulse value of each revolution of the revolution speed sensor; positive and negative rotation conversion waiting time threshold.
The specific content of the effectiveness diagnosis of the sensor signal by the diagnosis module comprises the following steps:
according to the inherent characteristics of the temperature signals of the temperature sensors, the validity of the temperature signals output by all the temperature sensors in the independent heat dissipation control system is diagnosed;
and diagnosing the validity of the fan rotating speed signal of the rotating speed sensor according to the inherent characteristics of the fan rotating speed signal of the rotating speed sensor.
The specific content of the effectiveness diagnosis of the control signal by the diagnosis module comprises the following steps:
diagnosing the current state signal of the electromagnetic valve of the proportional electromagnetic valve according to the inherent characteristics of the current state signal of the electromagnetic valve of the proportional electromagnetic valve;
and diagnosing the effectiveness of the forced refrigeration signal and the motor forward and reverse rotation signal according to the inherent characteristics of the forced refrigeration signal and the motor forward and reverse rotation signal in the process of transmitting through the bus.
(III) advantageous effects
Compared with the prior art, the control system of the independent heat dissipation system provided by the invention divides the control model into 7 modules according to the characteristics of system function realization, defines the functions of different sub-modules and transmission variable interfaces among the modules, and carries out control flow design on the core function management module according to the function requirements of the independent heat dissipation system, thereby laying a foundation for the generalization and modular design of the independent heat dissipation system.
According to the invention, through the division and design of the independent cooling system control model framework, the system function realization process is clear and smooth, the task definition of the sub-function module is clear, the code readability is high, the maintainability is good, the universality and modularization of the control system are greatly improved, and the development efficiency of the control system and the transportability of the control system are improved.
The method has the following beneficial effects: under the Matlab/Simulink software environment, according to the implementation characteristics of the control functions of the independent radiating systems of the engineering machinery and the special vehicle, the independent radiating system control system is provided, the system has clear structural logic time sequence, clear submodule functions and good module expandability and maintainability, and is convenient for team cooperation development. The control scheme is applied to the development of the independent cooling system control system, the system research and development efficiency can be greatly improved, and the system research and development quality is ensured.
Drawings
Fig. 1 is a schematic diagram of the technical scheme of the invention.
Wherein ①, ②, ③, ④, ⑤, ⑥, ⑦, ⑧, ⑨ and ⑩ are transmission parameters, and particularly ② 0 comprises a water temperature inlet temperature signal, a water temperature outlet temperature signal, a hydraulic oil inlet oil temperature signal, a hydraulic oil outlet oil temperature signal, a torque converter inlet oil temperature signal, a torque converter outlet oil temperature signal, an intercooler inlet temperature signal, an intercooler outlet temperature signal, a fan rotating speed signal, an engine rotating speed signal, a fan reverse rotation signal, a forced refrigeration signal and a filter alarm signal;
② water temperature inlet temperature signal, hydraulic oil inlet oil temperature signal, torque converter inlet oil temperature signal, intercooler inlet temperature signal, fan speed signal, engine speed signal, fan reverse rotation signal, and forced refrigeration signal;
③ water temperature inlet temperature signal, hydraulic oil inlet oil temperature signal, torque converter inlet oil temperature signal, intercooler inlet temperature signal;
④, a water temperature inlet temperature related threshold value, a hydraulic oil inlet oil temperature related threshold value, a torque converter inlet oil temperature related threshold value, an intercooler inlet temperature related threshold value, a fan rotating speed related threshold value, a fan reverse rotation time threshold value, a fan reverse rotation speed threshold value, a rotating speed sensor pulse per revolution value, a positive and negative rotation conversion waiting time threshold value and a proportional solenoid valve current hysteresis threshold value;
⑤, water temperature inlet temperature signal state value, hydraulic oil inlet oil temperature signal state value, torque converter inlet oil temperature signal state value, intercooler inlet temperature signal state value, fan rotating speed signal state value, engine rotating speed signal state value, fan reversal signal state value, forced refrigeration signal state value, and filter alarm signal state value;
⑥, self-checking mode command, program control mode command;
⑦, reverse mode command, forced cooling mode command, fan target speed, proportional valve driving target current, and switch valve signal;
⑧, fan target speed and proportional valve driving target current;
⑨, fault code and alarm signal;
⑩ proportional valve driving current and switch valve switching signal.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
The technical problem of the invention is solved: the control scheme of the independent cooling system is provided aiming at the characteristics of large difference of control requirements of the independent cooling system, strong complexity of working conditions, high complexity of a model and the like, so that the problems of unclear function division, poor model maintainability and poor portability of the existing model are solved, the model development efficiency is improved, and the model design quality is ensured.
Specifically, according to the function realization characteristics of the independent radiating system of the engineering vehicle and the special vehicle, the invention provides the control scheme of the independent radiating system, the logic is clear, the interface definition and the function of the sub-modules are definite, the different sub-modules are mutually independent, the model has good expandability and strong reusability, and the team development and the quality guarantee of the control model are facilitated, so that the development efficiency and the system portability of the control system of the independent radiating system are improved.
The control scheme of the independent cooling system adopts a modular design concept, the rotating speed of the fan is mainly determined according to the vehicle cooling requirement and the intention of a driver, the electromagnetic valve in the independent cooling system is controlled, the requirements of stopping, reversing, automatic speed regulation, highest rotating speed rotation and the like of the fan are met, and the functions of dedusting, cooling, forced refrigeration and the like of the independent cooling system are achieved. According to the functional requirement and the use requirement of the independent heat dissipation system, as shown in figure 1.
The independent cooling system control system includes: the device comprises an input module, a calibration parameter setting module, a diagnosis module, a function management module, a rotating speed estimation module and an electromagnetic valve control module; wherein the content of the first and second substances,
the input module is a unique interface module for inputting information by the control system and is used for acquiring all sensor signals and control signals of the vehicle, preprocessing the sensor signals and the control signals and generating processed sensor signals and control signals;
the calibration parameter setting module is a unique interface set by the calibration quantity of the control system, is used for communicating with the upper computer, receiving the configuration file of the upper computer and configuring the preset threshold values of the parameter group related to the diagnosis module, the function management module, the rotating speed estimation module and the electromagnetic valve control module according to the configuration file;
the diagnostic module is used for receiving the sensor signals and the control signals, carrying out effectiveness diagnosis on the sensor signals and the control signals, generating a diagnosis result and transmitting the diagnosis result to the function management module, and transmitting fault codes corresponding to the diagnosis result to the output module;
the function management module is mainly a core control unit of the independent heat dissipation control system and controls the brain. The function management module comprises: the automatic reversing device comprises a self-checking unit, an automatic reversing unit, a forced refrigerating unit and a program control unit;
the self-test unit is used for judging whether a sensor signal and a control signal from the input module and a diagnosis result from the diagnosis module are received or not, and judging that the self-test is normal under the condition that the sensor signal and the control signal from the input module are received and the diagnosis result is normal;
the automatic reversing unit is used for outputting a first electromagnetic valve driving instruction to the electromagnetic valve control module under the condition of normal self-checking, the electromagnetic valve control module executes reversing operation on the motor for controlling the fan, after the reversing operation is continued according to preset time, the electromagnetic valve control module drives the motor to recover the initial reversing operation, then the program control unit calls a preset threshold value of a parameter group and outputs the preset threshold value to the rotating speed estimation module, the rotating speed estimation module estimates the target rotating speed of the fan according to a sensor signal from the input module and the preset threshold value of the parameter group to generate a target rotating speed of the fan, the program control unit generates an electromagnetic valve target signal according to the target rotating speed of the fan, and generates a second electromagnetic valve driving instruction according to the comparison value of the electromagnetic valve target signal and a current state signal of the electromagnetic valve in the control signal and sends the second electromagnetic valve driving instruction to the, the electromagnetic valve control module drives the motor to normally work at the target rotating speed of the fan;
in the normal working process of the motor, if the function management module receives a motor forward and reverse rotation signal in the control signal, the forced reverse rotation unit outputs a third electromagnetic valve driving instruction to the electromagnetic valve control module and the output module according to the motor forward and reverse rotation signal, and the electromagnetic valve control module performs forced reverse rotation on the motor;
in the normal working process of the motor, if the function management module receives a forced refrigeration signal in the control signal, the forced refrigeration unit outputs a fourth electromagnetic valve driving instruction to the electromagnetic valve control module and the output module according to the forced refrigeration signal, and the electromagnetic valve control module drives the motor to perform forced refrigeration on the heat exchanger;
the electromagnetic valve control module is an execution unit for controlling the rotating speed of the fan and is used for controlling relevant electromagnetic valves according to a first electromagnetic valve driving instruction, a second electromagnetic valve driving instruction, a third electromagnetic valve driving instruction and a fourth electromagnetic valve driving instruction for controlling the proportional electromagnetic valve and the switch electromagnetic valve so as to drive the motor.
The independent cooling system control system further comprises: an output module;
the second electromagnetic valve driving instruction generated by the program control unit is also output to the output module;
the third electromagnetic valve driving instruction output by the forced reverse rotation unit is also output to an output module;
a fourth electromagnetic valve driving instruction output by the forced refrigeration unit is also output to an output module;
the output module is an output instruction generating unit and is also the only output interface of the control system and the outside; the output module is used for converting the second electromagnetic valve driving instruction, the third electromagnetic valve driving instruction and the fourth electromagnetic valve driving instruction into physical control quantities respectively to form electromagnetic valve driving display information; meanwhile, the fault code output by the diagnosis module is formed into a fault code signal; and the electromagnetic valve driving display information and the fault code information are uploaded to the whole vehicle, and the corresponding independent cooling system information display is carried out through the whole vehicle combination instrument.
The input module is used for preprocessing the sensor signals and the control signals and comprises the following steps: the sensor signals and the control signals are converted into signal specifications required by the function management module, the rotating speed estimation module and the diagnosis module, the sensor signals are subjected to noise reduction and filtering processing, physical quantities are converted according to engineering units, and the processed sensor signals and the processed control signals are generated.
Wherein the sensor signal comprises: fan speed signal, temperature signal.
Wherein the sensor signal further comprises: a filter alarm signal.
Wherein the temperature signal comprises: water temperature inlet temperature, water temperature outlet temperature, hydraulic oil inlet oil temperature, hydraulic oil outlet oil temperature, torque converter inlet oil temperature, torque converter outlet oil temperature, intercooler inlet temperature, and intercooler outlet temperature.
Wherein the control signal comprises: a forced refrigeration signal, a motor positive and negative rotation signal and an electromagnetic valve current state signal.
The preset threshold values of the parameter group comprise a water temperature inlet temperature threshold value, a hydraulic oil inlet oil temperature threshold value, a torque converter inlet oil temperature threshold value and an intercooler outlet temperature threshold value; a fan speed threshold; a fan reversal time threshold and a rotating speed threshold; the pulse value of each revolution of the revolution speed sensor; positive and negative rotation conversion waiting time threshold.
The specific content of the effectiveness diagnosis of the sensor signal by the diagnosis module comprises the following steps:
according to the inherent characteristics of the temperature signals of the temperature sensors, the validity of the temperature signals output by all the temperature sensors in the independent heat dissipation control system is diagnosed;
and diagnosing the validity of the fan rotating speed signal of the rotating speed sensor according to the inherent characteristics of the fan rotating speed signal of the rotating speed sensor.
The specific content of the effectiveness diagnosis of the control signal by the diagnosis module comprises the following steps:
diagnosing the current state signal of the electromagnetic valve of the proportional electromagnetic valve according to the inherent characteristics of the current state signal of the electromagnetic valve of the proportional electromagnetic valve;
and diagnosing the effectiveness of the forced refrigeration signal and the motor forward and reverse rotation signal according to the inherent characteristics of the forced refrigeration signal and the motor forward and reverse rotation signal in the process of transmitting through the bus.
Compared with the prior art, the invention has the advantages that the function division of the control model submodule is clear and has good universality, the overall control sequential logic is clear, the system integration is facilitated, and the team cooperation parallel research and development are facilitated, so that the research and development efficiency of the control module is greatly improved, and the framework is mainly suitable for the development of the control software of the independent cooling system.
Example 1
In this embodiment, the present invention is further described.
FIG. 1 depicts a model architecture of the present invention. The input module 1 reads a sensor signal and a CAN bus signal from an electric control unit register, performs noise reduction and filtering processing on the signals, converts physical quantity according to engineering units, and then outputs the signals to the diagnosis module 3 for signal effectiveness diagnosis; output to the function management module 4 for control function management; and the output is output to a rotating speed estimation module 5 for fan rotating speed estimation.
The calibration parameter setting module 2 sets temperature thresholds of water temperature inlet temperature, hydraulic oil inlet oil temperature, torque converter inlet oil temperature and intercooler outlet temperature through configuration files; a fan speed threshold; fan reversal time and speed threshold; the pulse value of each revolution of the revolution speed sensor; and configuring parameters such as forward and reverse conversion waiting time threshold values and the like, and transmitting the configured parameters and the like to the function management module 4.
The diagnosis module 3 diagnoses all temperature sensors and connecting lines in the system through the hardware diagnosis function of the electric control unit, and diagnoses the electromagnetic valve and the connecting lines; the signal threshold value of the temperature sensor is diagnosed through a software algorithm, the signal threshold value of the rotating speed sensor is diagnosed, and the validity of the bus signal is diagnosed. And transmits the diagnosis result to the function management module 4 and transmits the fault code to the output module 7.
The function management module 4 judges four control modes of system self-checking, inversion, forced refrigeration, program control and the like according to the acquired temperature signal, rotation speed signal, control signal and diagnosis result of the diagnosis module on the signal, and transmits four control mode instructions and corresponding electromagnetic valve control instructions to the rotation speed estimation module 5 and the electromagnetic valve control module 6.
The function management module control process of the invention comprises the following steps:
s102: powering on the independent heat dissipation control system, and initializing the system; s104: the system carries out self-checking on the sensor signals, the state of the solenoid valve and the state of the bus, if all the signals are normal, the system continues to execute downwards, and if the self-checking finds a fault, the system gives an alarm and waits for the fault to be eliminated; s106: the system is powered on for the first time, the reverse mode is automatically executed, and after a preset time threshold value or when a forced reverse signal exists, the automatic reverse mode is exited and the downward execution is continued; s108: the system monitors whether a forced inversion signal exists or not, if so, a forced inversion mode is executed, and if not, downward execution is continued; s110: the system monitors whether a forced refrigeration signal exists or not, if so, a forced refrigeration mode is executed, and if not, downward execution is continued; s112: the system starts a program control mode according to the temperature of the radiator and a specific control algorithm to automatically control the temperature of the radiator.
The rotating speed estimation module 5 estimates the target rotating speed of the fan according to the acquired temperature signal, the rotating speed signal and the control instruction of the function management module 4 by combining a heat balance control algorithm of the independent heat dissipation system, and outputs the target rotating speed to the electromagnetic valve control module 6.
The electromagnetic valve control module 6 performs output control on the proportional electromagnetic valve according to the target rotating speed of the fan output by the rotating speed estimation module 5 by combining a control strategy of the proportional electromagnetic valve; and controlling the relevant electromagnetic valves according to the proportional electromagnetic valve and the switch electromagnetic valve control instruction output by the function management module. And outputs control instructions of the proportional solenoid valve and the switching solenoid valve to the output module 7.
The output module 7 converts control instructions of the proportional solenoid valve and the switch solenoid valve output by the solenoid valve control module 6 into physical control quantities to drive the solenoid valves to work, so that the control of the rotating speed of the fan is realized; and uploading the fault code output by the diagnosis module 3 to the whole vehicle. And outputting the display information to the whole vehicle combination instrument for information display of the independent heat dissipation system.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An independent cooling system control system, comprising: the device comprises an input module, a calibration parameter setting module, a diagnosis module, a function management module, a rotating speed estimation module and an electromagnetic valve control module; wherein the content of the first and second substances,
the input module is used for acquiring all sensor signals and control signals of the vehicle, preprocessing the sensor signals and the control signals and generating processed sensor signals and control signals;
the calibration parameter setting module is used for communicating with an upper computer, receiving a configuration file of the upper computer, and configuring preset thresholds of parameter groups related to the diagnosis module, the function management module, the rotating speed estimation module and the electromagnetic valve control module according to the configuration file;
the diagnostic module is used for receiving the sensor signals and the control signals, carrying out effectiveness diagnosis on the sensor signals and the control signals, generating a diagnostic result and transmitting the diagnostic result to the function management module;
the function management module includes: the automatic reversing device comprises a self-checking unit, an automatic reversing unit, a forced refrigerating unit and a program control unit;
the self-test unit is used for judging whether a sensor signal and a control signal from the input module and a diagnosis result from the diagnosis module are received or not, and judging that the self-test is normal under the condition that the sensor signal and the control signal from the input module are received and the diagnosis result is normal;
the automatic reversing unit is used for outputting a first electromagnetic valve driving instruction to the electromagnetic valve control module under the condition of normal self-checking, the electromagnetic valve control module executes reversing operation on the motor for controlling the fan, after the reversing operation is continued according to preset time, the electromagnetic valve control module drives the motor to recover the initial reversing operation, then the program control unit calls a preset threshold value of a parameter group and outputs the preset threshold value to the rotating speed estimation module, the rotating speed estimation module estimates the target rotating speed of the fan according to a sensor signal from the input module and the preset threshold value of the parameter group to generate a target rotating speed of the fan, the program control unit generates an electromagnetic valve target signal according to the target rotating speed of the fan, and generates a second electromagnetic valve driving instruction according to the comparison value of the electromagnetic valve target signal and a current state signal of the electromagnetic valve in the control signal and sends the second electromagnetic valve driving, the electromagnetic valve control module drives the motor to normally work at the target rotating speed of the fan;
in the normal working process of the motor, if the function management module receives a motor forward and reverse rotation signal in the control signal, the forced reverse rotation unit outputs a third electromagnetic valve driving instruction to the electromagnetic valve control module according to the motor forward and reverse rotation signal, and the electromagnetic valve control module performs forced reverse rotation on the motor;
in the normal working process of the motor, if the function management module receives a forced refrigeration signal in the control signal, the forced refrigeration unit outputs a fourth electromagnetic valve driving instruction to the electromagnetic valve control module according to the forced refrigeration signal, and the electromagnetic valve control module drives the motor to perform forced refrigeration on the heat exchanger;
the electromagnetic valve control module is an execution unit for controlling the rotating speed of the fan and is used for controlling relevant electromagnetic valves according to a first electromagnetic valve driving instruction, a second electromagnetic valve driving instruction, a third electromagnetic valve driving instruction and a fourth electromagnetic valve driving instruction for controlling the proportional electromagnetic valve and the switch electromagnetic valve so as to drive the motor.
2. The independent heat dissipation system control system of claim 1, further comprising: an output module;
the diagnosis module also transmits the fault code corresponding to the diagnosis result to the output module;
the second electromagnetic valve driving instruction generated by the program control unit is also output to the output module;
the third electromagnetic valve driving instruction output by the forced reverse rotation unit is also output to an output module;
a fourth electromagnetic valve driving instruction output by the forced refrigeration unit is also output to an output module;
the output module is used for converting a second electromagnetic valve driving instruction, a third electromagnetic valve driving instruction and a fourth electromagnetic valve driving instruction into physical control quantities respectively to form electromagnetic valve driving display information; meanwhile, the fault code output by the diagnosis module is formed into a fault code signal; and the electromagnetic valve driving display information and the fault code information are uploaded to the whole vehicle, and the corresponding independent cooling system information display is carried out through the whole vehicle combination instrument.
3. The independent cooling system control system according to claim 1, wherein the input module preprocesses the sensor signals and the control signals including: the sensor signals and the control signals are converted into signal specifications required by the function management module, the rotating speed estimation module and the diagnosis module, the sensor signals are subjected to noise reduction and filtering processing, physical quantities are converted according to engineering units, and the processed sensor signals and the processed control signals are generated.
4. The independent cooling system control system of claim 1, wherein the sensor signal comprises: fan speed signal, temperature signal.
5. The independent cooling system control system of claim 4, wherein the sensor signal further comprises: a filter alarm signal.
6. The independent heat dissipation system control system of claim 4, wherein the temperature signal comprises: water temperature inlet temperature, water temperature outlet temperature, hydraulic oil inlet oil temperature, hydraulic oil outlet oil temperature, torque converter inlet oil temperature, torque converter outlet oil temperature, intercooler inlet temperature, and intercooler outlet temperature.
7. The independent heat dissipation system control system of claim 1, wherein the control signal comprises: a forced refrigeration signal, a motor positive and negative rotation signal and an electromagnetic valve current state signal.
8. The independent cooling system control system of claim 1, wherein the preset thresholds of the set of parameters include a water temperature inlet temperature threshold, a hydraulic oil inlet oil temperature threshold, a torque converter inlet oil temperature threshold, an intercooler outlet temperature threshold; a fan speed threshold; a fan reversal time threshold and a rotating speed threshold; the pulse value of each revolution of the revolution speed sensor; positive and negative rotation conversion waiting time threshold.
9. The independent cooling system control system according to claim 4, wherein the diagnostic module is configured to perform the validity diagnosis on the sensor signal by:
according to the inherent characteristics of the temperature signals of the temperature sensors, the validity of the temperature signals output by all the temperature sensors in the independent heat dissipation control system is diagnosed;
and diagnosing the validity of the fan rotating speed signal of the rotating speed sensor according to the inherent characteristics of the fan rotating speed signal of the rotating speed sensor.
10. The independent cooling system control system according to claim 7, wherein the specific content of the control signal validity diagnosis performed by the diagnosis module includes:
diagnosing the current state signal of the electromagnetic valve of the proportional electromagnetic valve according to the inherent characteristics of the current state signal of the electromagnetic valve of the proportional electromagnetic valve;
and diagnosing the effectiveness of the forced refrigeration signal and the motor forward and reverse rotation signal according to the inherent characteristics of the forced refrigeration signal and the motor forward and reverse rotation signal in the process of transmitting through the bus.
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| CN112031916A (en) * | 2020-09-04 | 2020-12-04 | 北京理工大学 | Engine cooling fan speed regulation control system, device and terminal equipment |
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