CN116146298A - Control method and device for engine waste heat recovery device and controller - Google Patents

Control method and device for engine waste heat recovery device and controller Download PDF

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Publication number
CN116146298A
CN116146298A CN202310243739.4A CN202310243739A CN116146298A CN 116146298 A CN116146298 A CN 116146298A CN 202310243739 A CN202310243739 A CN 202310243739A CN 116146298 A CN116146298 A CN 116146298A
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target
real
parameter
time
control
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Inventor
孙爱洲
王鹏
李丽
李子非
袁宝良
金华玉
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FAW Jiefang Automotive Co Ltd
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FAW Jiefang Automotive Co Ltd
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Priority to CN202310243739.4A priority Critical patent/CN116146298A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The present application relates to a method, an apparatus, a controller, a storage medium and a computer program product for controlling an engine waste heat recovery apparatus. The method comprises the following steps: when the working condition of the engine changes in the running process of the vehicle, acquiring real-time exhaust parameters of the engine in the waste heat recovery device; acquiring device control parameters and device target parameters based on the real-time exhaust parameters; acquiring device real-time parameters corresponding to the device target parameters, wherein the device real-time parameters are measured parameters related to a heat exchange module in the waste heat recovery device; and if the device real-time parameter and the device target parameter meet the preset device closed-loop control condition, controlling the waste heat recovery device based on the device real-time parameter, the device target parameter and the device control parameter. The method can reduce the control cost of the waste heat recovery device.

Description

Control method and device for engine waste heat recovery device and controller
Technical Field
The present disclosure relates to the field of engine technologies, and in particular, to a method and apparatus for controlling an engine waste heat recovery device, a controller, a storage medium, and a computer program product.
Background
With the development of engine technology, from the energy-heat balance analysis of the engine, the rest of heat energy has great energy-saving potential, and at present, the engine waste heat energy utilization technology is mainly concentrated on the aspects of supercharging, waste heat refrigeration, waste heat heating, waste heat power generation, fuel combustion performance improvement and the like. Among various technical schemes of current vehicle waste heat utilization, the waste heat recovery device (namely, the rankine cycle waste heat recovery device) has the highest heat efficiency.
In the traditional technology, on one hand, the waste heat recovery device under the stable working condition is controlled, the control method under the variable working condition is less, on the other hand, under the variable working condition, the working medium flow is increased to the design flow through the working medium pump in a mode of installing the working medium pump, so that the waste heat recovery device of the Rankine cycle realizes waste heat recovery, the working medium pump has higher power consumption, the requirement on the reliability of a bypass valve is high, the cost of parts of the Rankine cycle system is high, and the device of the Rankine cycle waste heat recovery device is not suitable for being popularized and applied in the automobile field.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a control method, apparatus, controller, computer-readable storage medium, and computer program product for an engine waste heat recovery device that can reduce the control cost of the waste heat recovery device.
In a first aspect, the present application provides a method for controlling an engine waste heat recovery device, the method comprising:
when the working condition of the engine changes in the running process of the vehicle, acquiring real-time exhaust parameters of the engine in the waste heat recovery device;
acquiring device control parameters and device target parameters based on the real-time exhaust parameters;
acquiring device real-time parameters corresponding to the device target parameters, wherein the device real-time parameters are measured parameters related to a heat exchange module in the waste heat recovery device;
and if the device real-time parameter and the device target parameter meet the preset device closed-loop control condition, controlling the waste heat recovery device based on the device real-time parameter, the device target parameter and the device control parameter.
In one embodiment, the real-time exhaust parameters include real-time exhaust temperature and real-time exhaust flow;
the obtaining the device control parameter and the device target parameter based on the real-time exhaust parameter includes:
and inquiring a preset parameter mapping table based on the real-time exhaust temperature and the real-time exhaust flow to obtain device control parameters and device target parameters.
In one embodiment, the parameter mapping table includes at least one control parameter mapping table, and a target parameter mapping table associated with the control parameter mapping table;
the step of inquiring a preset parameter mapping table based on the real-time exhaust temperature and the real-time exhaust flow to obtain a device control parameter and a device target parameter comprises the following steps:
and inquiring the control parameter mapping table based on the real-time exhaust temperature and the real-time exhaust flow to obtain device control parameters, and inquiring a target parameter mapping table associated with the control parameter mapping table to obtain device target parameters.
In one embodiment, the control parameter mapping table includes at least one of an electronic control three-way valve opening mapping table, a working medium pump rotating speed mapping table and a working medium electronic control three-way valve opening mapping table;
if the control parameter mapping table comprises an electric control three-way valve opening mapping table, the target parameter mapping table comprises an evaporator outlet exhaust temperature mapping table associated with the electric control three-way valve opening mapping table, the device control parameter is the electric control three-way valve opening, and the device target parameter is the target exhaust outlet temperature;
if the control parameter mapping table comprises a working medium pump rotating speed mapping table, the target parameter mapping table comprises an evaporator outlet overheat temperature mapping table associated with the working medium pump rotating speed mapping table, the device control parameter is the working medium pump rotating speed, and the device target parameter is the target overheat temperature;
If the control parameter mapping table comprises a working medium electric control three-way valve opening mapping table, the target parameter mapping table comprises an evaporator outlet pressure mapping table associated with the working medium electric control three-way valve opening mapping table, the device control parameter is the working medium electric control three-way valve opening, and the device target parameter is the target evaporation pressure.
In one embodiment, the control parameter mapping table further includes a variable frequency electric control fan rotation speed mapping table;
if the control parameter mapping table further comprises a variable frequency electric control fan rotating speed mapping table, the target parameter mapping table further comprises a condenser outlet pressure mapping table associated with the variable frequency electric control fan rotating speed mapping table; the control parameter of the device is the rotating speed of the variable-frequency electric control fan, and the target parameter of the device is the target condensing pressure.
In one embodiment, if the device real-time parameter and the device target parameter meet a preset device closed-loop control condition, controlling the waste heat recovery device based on the device real-time parameter, the device target parameter and the device control parameter includes:
when the target exhaust outlet temperature is not equal to the real-time exhaust outlet temperature under the conditions that the target device parameter comprises the target exhaust outlet temperature, the control parameter comprises the opening of the electric control three-way valve and the real-time device parameter comprises the real-time exhaust outlet temperature, determining that a preset device closed-loop control condition is met, and regulating and controlling the opening of the electric control three-way valve by taking the target exhaust outlet temperature as a target value until the real-time exhaust outlet temperature meets a preset exhaust temperature stop condition;
When the target overheat temperature is different from the real-time overheat temperature under the conditions that the target overheat temperature of the device comprises the target overheat temperature, the control parameter of the device comprises the rotating speed of the working medium pump and the real-time parameter of the device comprises the real-time overheat temperature, determining that a preset closed-loop control condition of the device is met, and regulating and controlling the rotating speed of the working medium pump by taking the target overheat temperature as a target value until the real-time overheat temperature meets a preset overheat temperature stop condition;
when the target evaporation pressure is different from the real-time evaporation pressure under the conditions that the target evaporation pressure of the device comprises the target evaporation pressure, the control parameter of the device comprises the opening of the working medium electric control three-way valve, and the real-time parameter of the device comprises the real-time evaporation pressure, determining that a preset closed-loop control condition of the device is met, and regulating and controlling the opening of the working medium electric control three-way valve by taking the target evaporation pressure as a target value until the real-time evaporation pressure meets a preset evaporation pressure stopping condition;
when the target condensing pressure is different from the real-time condensing pressure under the conditions that the target condensing pressure is included in the device target parameters, the variable-frequency electric control fan rotating speed is included in the device control parameters, and the real-time condensing pressure is included in the device real-time parameters, determining that a preset closed-loop control condition of the device is met, and adjusting and controlling the variable-frequency electric control fan rotating speed by taking the target condensing pressure as a target value until the real-time condensing pressure meets a preset condensing pressure stopping condition.
In a second aspect, the present application further provides a control device for engine waste heat recovery, the device comprising:
the first data acquisition module is used for acquiring real-time exhaust parameters of the engine in the waste heat recovery device when the working condition of the engine changes in the running process of the vehicle;
the second data acquisition module is used for acquiring device control parameters and device target parameters based on the real-time exhaust parameters;
the third data acquisition module is used for acquiring device real-time parameters corresponding to the device target parameters, wherein the device real-time parameters are measured parameters related to the heat exchange module in the waste heat recovery device;
and the control module is used for controlling the waste heat recovery device based on the device real-time parameter, the device target parameter and the device control parameter if the device real-time parameter and the device target parameter meet the preset device closed-loop control condition.
In a third aspect, the present application also provides a controller. The controller comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the control method for engine waste heat recovery when executing the computer program.
In a fourth aspect, the present application also provides a computer-readable storage medium. The computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the above-described control method of engine waste heat recovery.
In a fifth aspect, the present application also provides a computer program product. The computer program product comprises a computer program which, when executed by a processor, implements the steps of the above-described control method of engine waste heat recovery.
The control method, the device, the controller, the storage medium and the computer program product of the engine waste heat recovery device acquire real-time exhaust parameters of the engine in the waste heat recovery device when the working condition of the engine changes during the running process of the vehicle; acquiring device control parameters and device target parameters based on the real-time exhaust parameters; acquiring device real-time parameters corresponding to device target parameters, wherein the device real-time parameters are measured parameters related to a heat exchange module in the waste heat recovery device; and if the device real-time parameter and the device target parameter meet the preset device closed-loop control condition, controlling the waste heat recovery device based on the device real-time parameter, the device target parameter and the device control parameter. The device real-time parameters, the device target parameters and the device control parameters of the waste heat recovery device are acquired in the variable working condition process of the engine, and the waste heat recovery device is controlled by the device real-time parameters, the device target parameters and the device control parameters, so that the control cost of the waste heat recovery device is effectively reduced, the high-efficiency work of the waste heat recovery device in the whole variable working condition process can be maintained, and the application and popularization of the waste heat recovery device in the automobile field are facilitated.
Drawings
FIG. 1 is a block diagram of an engine waste heat recovery device according to one embodiment;
FIG. 2 is a schematic diagram of an engine waste heat recovery device according to another embodiment;
FIG. 3 is a flow chart of a method of controlling an engine waste heat recovery device in one embodiment;
FIG. 4 is a flow chart of a method of controlling an engine waste heat recovery device according to another embodiment;
FIG. 5 is a block diagram of a control device for an engine waste heat recovery device according to one embodiment;
fig. 6 is an internal structural diagram of a controller in one embodiment.
Reference numerals illustrate: 1-an engine; 2-a compressor; 3-a turbine; 4-an engine exhaust aftertreatment device; 5-exhausting an electric control three-way valve; 6-an exhaust gas heat exchanger; 7-working medium electric control three-way valve; 8-an expander; a 9-generator; 10-a one-way valve; 11-a condenser; 12-a liquid storage tank; 13-a safety valve; 14-a variable-frequency working medium pump; 15-a variable frequency electric control fan; a 16-rankine cycle controller; 17-a temperature sensor; 18-a pressure sensor; 19-a pressure sensor; 20-a temperature sensor; 21-an engine controller; 22-temperature sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The control method of the engine waste heat recovery device provided by the embodiment of the application can be applied to the engine waste heat recovery device (namely, the Rankine cycle device) shown in fig. 1. The engine waste heat recovery device shown in fig. 1 includes an engine subsystem, an organic rankine cycle subsystem, and a control subsystem, where the control subsystem may include various controllers, such as a rankine cycle controller (i.e., an organic rankine cycle controller), an engine controller, and the like, and the rankine cycle controller may obtain a real-time exhaust parameter of an engine from the engine controller, thereby obtaining a device real-time parameter, a device target parameter, and a device control parameter according to the real-time exhaust parameter, and controlling the engine subsystem and the organic rankine cycle subsystem according to the device real-time parameter, the device target parameter, and the device control parameter.
In one embodiment, as shown in fig. 2, a schematic structural diagram of an engine waste heat recovery device in another embodiment is shown, where, as shown in fig. 2, an engine subsystem includes an engine (1), a compressor (2), a turbine (3), an air inlet pipeline, an exhaust pipeline, an engine exhaust gas post-treatment device (4), an exhaust electric control three-way valve (5) and an exhaust heat exchanger (6), where, the air inlet pipeline is connected with an air inlet end of the compressor (2), the engine (1) is connected with an air inlet end of the turbine (3), an air outlet end of the turbine (3) is connected with an air inlet end of the engine exhaust gas post-treatment device (4), an air outlet end of the engine exhaust gas post-treatment device (4) is connected with an air inlet end of the exhaust electric control three-way valve (5), an air outlet end c of the exhaust electric control three-way valve (5) is connected with an air outlet side inlet of the exhaust heat exchanger (6), and an air outlet side of the exhaust heat exchanger (6) is connected with the air outlet pipeline.
The organic Rankine cycle subsystem comprises an expander (8), a generator (9), a one-way valve (10), a condenser (11), a variable-frequency electric control fan (15), a liquid storage tank (12), a variable-frequency working medium pump (14) and a working medium electric control three-way valve (7). The outlet of the variable-frequency working medium pump (14) is connected with the working medium side inlet of the exhaust heat exchanger (6), the working medium side outlet of the exhaust heat exchanger (6) is connected with the inlet of the working medium electric control three-way valve (7), the outlet end e of the working medium electric control three-way valve (7) is connected with the inlet of the expansion machine (8), the outlet of the expansion machine (8) is connected with the inlet of the one-way valve (10), the outlet of the one-way valve (10) is connected with the working medium side inlet of the condenser (11), the working medium side outlet of the condenser (11) is connected with the inlet of the liquid storage tank (12), and the outlet of the liquid storage tank (12) is connected with the inlet of the variable-frequency working medium pump (14). The expander (8) is provided with a bypass for bypassing part of the organic working medium, and the bypass is arranged in such a way that the outlet end f of the working medium electric control three-way valve (7) is connected with the outlet of the one-way valve (10). The variable-frequency electric control fan (15) is arranged at the front end of the condenser (11) and is used for cooling working media in the condenser (11). The expander (8) is connected with the generator (9) through a connecting shaft, and a safety valve 13 is arranged at the top end of the liquid storage tank 12.
The control subsystem comprises a Rankine cycle controller (16), an engine controller (21), a temperature sensor (17), a pressure sensor (18), a pressure sensor (19), a temperature sensor (20) and a temperature sensor (22); the Rankine cycle controller (16) can calculate the overheat temperature value of the working medium in the current state according to the temperature and the pressure sensor value of the working medium; the engine controller (21) may transmit an engine exhaust flow signal to the rankine cycle controller (16).
In one embodiment, during the running of the vehicle, when the working condition of the engine changes, the rankine cycle controller acquires the real-time exhaust parameters of the engine in the waste heat recovery device; acquiring device control parameters and device target parameters based on the real-time exhaust parameters; acquiring device real-time parameters corresponding to device target parameters, wherein the device real-time parameters are measured parameters related to a heat exchange module in the waste heat recovery device; and if the device real-time parameter and the device target parameter meet the preset device closed-loop control condition, controlling the waste heat recovery device based on the device real-time parameter, the device target parameter and the device control parameter.
In one embodiment, as shown in fig. 3, a control method of an engine waste heat recovery device is provided, and an example of application of the method to the rankine cycle controller in fig. 1 is described, including the following steps:
step S302, when the working condition of the engine changes during the running process of the vehicle, acquiring the real-time exhaust parameters of the engine in the waste heat recovery device.
If parameters such as a rotational speed of the engine, a position of an accelerator pedal, an exhaust temperature of the engine and the like change within a certain period of time, and a difference between the parameters before and after the change reaches a difference threshold, the real-time exhaust parameter may be an exhaust parameter related to the engine, which is obtained in real time by the rankine cycle controller when the working condition of the engine is determined to change, for example, the real-time exhaust parameter may be an exhaust temperature of the engine measured in real time according to a temperature sensor, and an exhaust flow of the engine fed back in real time by the engine controller.
Step S304, obtaining a device control parameter and a device target parameter based on the real-time exhaust parameter.
The device control parameters can be key working parameters of the waste heat recovery device, which are obtained by the Rankine cycle controller according to the real-time exhaust parameters, wherein the key working parameters can be parameters which directly influence the working efficiency of the waste heat recovery device, the Rankine cycle controller can control related execution mechanisms of the waste heat recovery device according to the key working parameters so as to realize waste heat recovery operation of the waste heat recovery device, wherein the execution mechanisms can be an electric control three-way valve, a variable frequency working medium pump, a working medium electric control three-way valve and the like, and the Rankine cycle controller can obtain the device control parameters which can be the opening of the electric control three-way valve, the rotating speed of the working medium pump, the opening of the working medium electric control three-way valve and the like according to the real-time exhaust parameters.
The device target parameter may be a value that the rankine cycle controller should theoretically reach in actual work of each heat exchange module in the obtained waste heat recovery device according to the real-time exhaust parameter, where the device target parameter may be a parameter that regulates and controls a key working parameter of the waste heat recovery device. For example, each heat exchange module may be an evaporator, a condenser, or the like, and the rankine cycle controller may obtain, according to the real-time exhaust parameters, a target exhaust outlet temperature, a target evaporation pressure, a target condensation pressure, or the like of the evaporator as target values, and then respectively regulate and control an opening of the electric control three-way valve, a rotational speed of the working medium pump, an opening of the working medium electric control three-way valve, or the like based on the target values.
Step S306, acquiring device real-time parameters corresponding to the device target parameters, wherein the device real-time parameters are measured parameters related to the heat exchange module in the waste heat recovery device.
The device real-time parameter may be an actual value of an evaporator, a condenser, etc. in the waste heat recovery device during operation, and for each heat exchange module, the device target parameter corresponds to a corresponding device real-time parameter, for example, if the heat exchange module is an evaporator, the device target parameter of the evaporator may be a target exhaust outlet temperature, and the device real-time parameter corresponding to the target exhaust outlet temperature may be a real-time exhaust outlet temperature; for another example, the heat exchange module is a condenser, the device target parameter of the condenser may be a target condensing pressure, and the device real-time parameter corresponding to the target condensing pressure may be a real-time condensing pressure.
Step S308, if the device real-time parameter and the device target parameter meet the preset device closed-loop control condition, controlling the waste heat recovery device based on the device real-time parameter, the device target parameter and the device control parameter.
The closed-loop control condition of the device can be a preset condition for determining whether to perform closed-loop control on the waste heat recovery device, when the closed-loop control condition of the device is set, the closed-loop control condition of the waste heat recovery device can be adaptively adjusted according to the actual running condition of the waste heat recovery device, and when the real-time device parameter and the target device parameter meet the preset closed-loop control condition of the device, the Rankine cycle controller can control the waste heat recovery device according to the real-time device parameter, the target device parameter and the control device parameter.
In the control method of the engine waste heat recovery device, when the working condition of the engine changes in the running process of the vehicle, the real-time exhaust parameters of the engine in the waste heat recovery device are obtained; acquiring device control parameters and device target parameters based on the real-time exhaust parameters; acquiring device real-time parameters corresponding to device target parameters, wherein the device real-time parameters are measured parameters related to a heat exchange module in the waste heat recovery device; and if the device real-time parameter and the device target parameter meet the preset device closed-loop control condition, controlling the waste heat recovery device based on the device real-time parameter, the device target parameter and the device control parameter. The device real-time parameters, the device target parameters and the device control parameters of the waste heat recovery device are acquired in the variable working condition process of the engine, and the waste heat recovery device is controlled by the device real-time parameters, the device target parameters and the device control parameters, so that the control cost of the waste heat recovery device is effectively reduced, the high-efficiency work of the waste heat recovery device in the whole variable working condition process can be maintained, and the application and popularization of the waste heat recovery device in the automobile field are facilitated.
In one embodiment, the real-time exhaust parameters include a real-time exhaust temperature, which may be a current exhaust temperature of the engine fed back to the rankine cycle controller by a measurement device (e.g., a temperature sensor), and a real-time exhaust flow, which may be a current exhaust flow of the engine fed back to the rankine cycle controller by the engine controller. Obtaining device control parameters and device target parameters based on the real-time exhaust parameters, including: and inquiring a preset parameter mapping table based on the real-time exhaust temperature and the real-time exhaust flow to obtain device control parameters and device target parameters.
The parameter mapping table may be used to represent the mapping relationship between the real-time exhaust temperature and the real-time exhaust flow, and the device control parameters and the device target parameters, i.e. each group of real-time exhaust temperature and real-time exhaust flow corresponds to the corresponding device control parameters and device target parameters. When the parameter mapping table is set, the maximum target calibration value of the net output power of the waste heat recovery device can be determined according to the steady-state working condition of the engine. Specifically, the rankine cycle controller may perform table lookup according to the real-time exhaust temperature and the real-time exhaust flow, to obtain the device control parameter and the device target parameter.
In the above embodiment, the rankine cycle controller obtains the device control parameter and the device target parameter by obtaining two variables, i.e., the real-time exhaust temperature and the real-time exhaust flow, and performing a table lookup process.
In one embodiment, the parameter mapping table includes at least one control parameter mapping table and a target parameter mapping table associated with the control parameter mapping table, where the device control parameter and the device target parameter may be determined by different mapping tables, and according to an actual control requirement, the parameter mapping table may include only one control parameter mapping table or may include multiple control parameter mapping tables, where each control parameter mapping table is associated with a corresponding target parameter mapping table. Based on the real-time exhaust temperature and the real-time exhaust flow, inquiring a preset parameter mapping table to obtain a device control parameter and a device target parameter, wherein the method comprises the following steps: based on the real-time exhaust temperature and the real-time exhaust flow, a control parameter map is queried to obtain device control parameters, and a target parameter map associated with the control parameter map is queried to obtain device target parameters.
The rankine cycle controller can obtain the device control parameters by inquiring the control parameter mapping table and obtain the device target parameters by inquiring the target parameter mapping table when inquiring the device target parameters and the device control parameters according to the real-time exhaust temperature and the real-time exhaust flow.
In the above embodiment, for the device target parameter and the device control parameter, the corresponding mapping tables may be queried respectively to determine the device control parameter and the device target parameter.
In one embodiment, the control parameter mapping table includes at least one of an electric control three-way valve opening mapping table, a working medium pump rotating speed mapping table or a working medium electric control three-way valve opening mapping table, that is, the control parameter mapping table may include only one of the electric control three-way valve opening mapping table, the working medium pump rotating speed mapping table or the working medium electric control three-way valve opening mapping table, or may include any two or more combinations of the electric control three-way valve opening mapping table, the working medium pump rotating speed mapping table or the working medium electric control three-way valve opening mapping table, and each control parameter mapping table is associated with a target parameter mapping table. The device target parameter may be a parameter for adjusting and controlling a device control parameter of the waste heat recovery device, so when determining a target parameter mapping table associated with the control parameter mapping table, the device target parameter capable of influencing a certain device control parameter may be determined, and then the target parameter mapping table may be constructed.
In one embodiment, if the control parameter map includes an electronically controlled three-way valve opening map, the target parameter map includes an evaporator outlet exhaust temperature map associated with the electronically controlled three-way valve opening map, the device control parameter is an electronically controlled three-way valve opening, and the device target parameter is a target exhaust outlet temperature.
The electronic control three-way valve opening mapping table can represent the mapping relation between the electronic control three-way valve opening and the real-time exhaust temperature and the real-time exhaust flow, the target parameter mapping table related to the electronic control three-way valve opening mapping table is an evaporator outlet exhaust temperature mapping table, and the Rankine cycle controller can query the electronic control three-way valve opening mapping table according to the real-time exhaust temperature and the real-time exhaust flow to obtain the electronic control three-way valve opening, and query the evaporator outlet exhaust temperature mapping table according to the real-time exhaust temperature and the real-time exhaust flow to obtain the target exhaust outlet temperature.
In the above embodiment, the rankine cycle controller may query the opening mapping table of the electronic control three-way valve to obtain the opening of the electronic control three-way valve, query the exhaust temperature mapping table of the evaporator outlet to obtain the target exhaust outlet temperature, and thus develop the subsequent closed-loop control according to the determined relevant parameters.
In one embodiment, if the control parameter map includes a working fluid pump speed map, the target parameter map includes an evaporator outlet superheat temperature map associated with the working fluid pump speed map, the device control parameter is a working fluid pump speed, and the device target parameter is a target superheat temperature.
In the above embodiment, the rankine cycle controller may query the working medium pump rotation speed map to obtain the working medium pump rotation speed, and query the evaporator outlet overheat temperature map to obtain the target overheat temperature, thereby expanding the subsequent closed loop control according to the determined relevant parameters.
In one embodiment, if the control parameter map includes a working medium electric control three-way valve opening map, the target parameter map includes an evaporator outlet pressure map associated with the working medium electric control three-way valve opening map, the device control parameter is the working medium electric control three-way valve opening, and the device target parameter is the target evaporation pressure.
In the above embodiment, the rankine cycle controller may query the opening mapping table of the working medium electric control three-way valve to obtain the opening of the working medium electric control three-way valve, query the outlet pressure mapping table of the evaporator to obtain the target evaporation pressure, and thus develop the subsequent closed-loop control according to the determined relevant parameters.
In one embodiment, the control parameter mapping table further comprises a variable frequency electric control fan rotation speed mapping table; if the control parameter mapping table further comprises a variable frequency electric control fan rotation speed mapping table, the target parameter mapping table further comprises a condenser outlet pressure mapping table associated with the variable frequency electric control fan rotation speed mapping table; the control parameter of the device is the rotating speed of the variable-frequency electric control fan, and the target parameter of the device is the target condensing pressure. Wherein, because the rotating speed of the variable frequency electric control wind speed only affects the target condensing pressure, the variable frequency electric control wind speed can be regulated and controlled simultaneously with the opening of the electric control three-way valve, the rotating speed of the working medium pump and the opening of the working medium electric control three-way valve, and can also be independently regulated and controlled to increase the flexibility of regulation and control, further, because the opening of the electric control three-way valve, the rotating speed of the working medium pump and the opening of the working medium electric control three-way valve have stronger relevance, when the follow-up regulation and control are carried out, the three are synchronously regulated and controlled, and the working efficiency of the waste heat recovery device can be improved to a greater extent.
In one embodiment, if the device real-time parameter and the device target parameter meet a preset device closed-loop control condition, controlling the waste heat recovery device based on the device real-time parameter, the device target parameter and the device control parameter includes: when the target exhaust outlet temperature is not equal to the real-time exhaust outlet temperature, determining that a preset device closed-loop control condition is met, and regulating and controlling the opening of the electric control three-way valve by taking the target exhaust outlet temperature as a target value until the real-time exhaust outlet temperature meets a preset exhaust temperature stop condition.
The preset exhaust temperature stopping condition may be a preset condition for judging whether to stop regulating the opening of the electric control three-way valve, wherein the preset exhaust temperature stopping condition may be whether a difference value between the real-time exhaust outlet temperature and the target exhaust outlet temperature is within an exhaust temperature threshold range, the exhaust temperature threshold range may be 0-5 degrees, and the exhaust temperature threshold may be adaptively regulated according to actual conditions.
Specifically, the rankine cycle controller may determine whether the target exhaust outlet temperature is equal to the real-time exhaust outlet temperature, and if the target exhaust outlet temperature is not equal to the real-time exhaust outlet temperature, it indicates that a preset device closed-loop control condition is satisfied, and the rankine cycle controller may perform PID (proportional integral derivative) closed-loop control on the waste heat closed-loop control device, that is, adjust and control the opening of the electric control three-way valve with the target exhaust outlet temperature as a target value, until the difference between the real-time exhaust outlet temperature and the target exhaust outlet temperature reaches an exhaust temperature threshold value, and stop the adjustment and control.
In the above embodiment, the rankine cycle controller adopts PID closed-loop control, takes the target exhaust outlet temperature as the target value, adjusts and controls the opening of the electric control three-way valve until the real-time exhaust outlet temperature approaches the target exhaust outlet temperature, thereby maintaining the high-efficiency operation of the waste heat recovery device in the whole variable working condition process and being beneficial to the application and popularization of the organic rankine cycle waste heat recovery device of the engine in the field of automobiles.
In one embodiment, when the target overheat temperature is different from the real-time overheat temperature under the condition that the target overheat temperature includes the target overheat temperature, the device control parameter includes the rotation speed of the working medium pump, and the real-time overheat temperature includes the real-time overheat temperature, determining that a preset closed loop control condition is met, and adjusting and controlling the rotation speed of the working medium pump by taking the target overheat temperature as the target value until the real-time overheat temperature meets a preset overheat temperature stop condition.
The preset overheat temperature stopping condition may be a preset condition for judging whether to stop regulating and controlling the rotation speed of the electric control working medium pump, wherein the overheat temperature stopping condition may be whether a difference value between the real-time overheat temperature and the target overheat temperature is within an overheat temperature threshold range, the overheat temperature threshold range may be the same as or different from an exhaust temperature threshold range, and the overheat temperature threshold range may be adaptively regulated according to an actual situation.
Specifically, the rankine cycle controller may determine whether the target overheat temperature is equal to the real-time overheat temperature, and if the target overheat temperature is not equal to the real-time overheat temperature, it indicates that a preset device closed-loop control condition is satisfied, and the rankine cycle controller may perform PID closed-loop control on the waste heat closed-loop control device, that is, adjust and control the rotation speed of the working medium pump by using the target overheat temperature as a target value, until the difference between the target overheat temperature and the real-time overheat temperature is within an overheat temperature threshold range.
In the above embodiment, the rankine cycle controller adopts PID closed-loop control, and adjusts and controls the rotation speed of the working medium pump by taking the target overheat temperature as the target value until the real-time overheat temperature approaches the target overheat temperature, so that the high-efficiency operation of the waste heat recovery device in the whole variable working condition process can be maintained, and the application and popularization of the organic rankine cycle waste heat recovery device of the engine in the field of automobiles are facilitated.
In one embodiment, when the device target parameter includes a target evaporation pressure, the device control parameter includes a working medium electric control three-way valve opening, and the device real-time parameter includes a real-time evaporation pressure, when the target evaporation pressure is different from the real-time evaporation pressure, determining that a preset device closed-loop control condition is met, and taking the target evaporation pressure as a target value, regulating and controlling the working medium electric control three-way valve opening until the real-time evaporation pressure meets a preset evaporation pressure stop condition, stopping regulating and controlling.
The preset evaporation pressure stopping condition can be a preset condition for judging whether to stop regulating and controlling the opening of the working medium electric control three-way valve, wherein the preset evaporation pressure stopping condition can be whether the difference value between the real-time evaporation pressure and the target evaporation pressure is in an evaporation pressure threshold range, and the evaporation pressure threshold range can be adaptively regulated according to actual conditions.
Specifically, the rankine cycle controller can firstly judge whether the real-time evaporation pressure is equal to the target evaporation pressure, if the real-time evaporation pressure is unequal to the target evaporation pressure, the rankine cycle controller indicates that the preset device closed-loop control condition is met, and can perform PID closed-loop control on the waste heat closed-loop control device, namely, the target evaporation pressure is taken as a target value, the opening of the working medium electric control three-way valve is regulated and controlled until the difference value between the real-time evaporation pressure and the target evaporation pressure is within the evaporation pressure threshold range, and the regulation and control are stopped.
In the above embodiment, the rankine cycle controller adopts PID closed-loop control, takes the target evaporation pressure as the target value, and regulates and controls the opening of the working medium electric control three-way valve until the real-time evaporation pressure approaches the target evaporation pressure, so that the high-efficiency operation of the waste heat recovery device in the whole variable working condition process can be maintained, and the application and popularization of the organic rankine cycle waste heat recovery device of the engine in the field of automobiles are facilitated.
In one embodiment, when the device target parameter includes a target condensing pressure, the device control parameter includes a variable frequency electric control fan rotational speed, and the device real-time parameter includes a real-time condensing pressure, when the target condensing pressure is different from the real-time condensing pressure, determining that a preset device closed-loop control condition is satisfied, and adjusting and controlling the variable frequency electric control fan rotational speed with the target condensing pressure as a target value until the real-time condensing pressure satisfies a preset condensing pressure stop condition.
The preset condensing pressure stopping condition may be a preset condition for judging whether to stop regulating and controlling the rotating speed of the variable frequency electric control fan, wherein the preset condensing pressure stopping condition may be whether a difference value between the real-time condensing pressure and the target condensing pressure is within a condensing pressure threshold range, the condensing pressure threshold range may be the same as or different from an evaporating pressure threshold range, and the condensing pressure threshold range may be adaptively regulated according to an actual situation.
Specifically, the rankine cycle controller may determine whether the real-time condensing pressure is equal to the target condensing pressure, if the real-time condensing pressure is not equal to the target condensing pressure, it indicates that a preset device closed-loop control condition is satisfied, and the rankine cycle controller may perform PID closed-loop control on the waste heat closed-loop control device, that is, adjust and control the rotation speed of the variable frequency electric control fan with the target condensing pressure as a target value, until the difference between the real-time condensing pressure and the target condensing pressure is within a condensing pressure threshold range, and stop the adjustment and control.
In the above embodiment, the rankine cycle controller adopts PID closed-loop control, takes the target condensing pressure as the target value, and regulates the rotation speed of the industrial variable frequency electric control fan until the real-time condensing pressure approaches the target condensing pressure, so that the high-efficiency operation of the waste heat recovery device in the whole variable working condition process can be maintained, thereby being beneficial to the application and popularization of the organic rankine cycle waste heat recovery device of the engine in the field of automobiles.
In one embodiment, if the parameters such as the exhaust temperature of the engine are not changed or the difference between the before-change and after-change parameters does not reach the difference threshold value within a certain period of time, the working condition of the engine is kept stable, and the rankine cycle controller can acquire real-time exhaust parameters under the stable working condition, for example, when the engine runs to the working condition a and is kept stable under the working condition a, the rankine cycle controller can acquire the real-time exhaust temperature under the working condition a according to the temperature sensor, acquire the real-time exhaust flow under the working condition a fed back by the engine controller, and respectively query the opening mapping table of the electronic control three-way valve, the working medium pump rotation speed mapping table, the opening mapping table of the electronic control three-way valve and the rotation speed mapping table of the variable frequency electronic control fan according to two input variables such as the exhaust temperature and the exhaust flow under the stable working condition, so as to acquire the opening of the electronic control three-way valve, the working medium electronic control three-way valve rotation speed, the working medium pump rotation speed and the variable frequency electronic control fan rotation speed required by the engine under the working condition a, and drive the corresponding executing mechanism to achieve recovery of the waste heat under the working condition of the electronic control.
In one embodiment, as shown in fig. 4, a flowchart of a control method of the engine waste heat recovery device in one embodiment is shown:
in the running process of the vehicle, when parameters such as the exhaust temperature of the engine change within a certain period of time and the difference between the before-change and after-change values reaches a difference threshold value, the working condition of the engine is determined to change, and in order to ensure that the organic Rankine cycle waste heat recovery device stably and efficiently works, closed-loop control is needed to be carried out on the organic Rankine cycle waste heat recovery device.
After the working condition of the engine changes, the Rankine cycle controller can acquire the current working condition exhaust temperature fed back by the temperature sensor and acquire two variables of the current working condition exhaust flow fed back by the engine controller.
After the current working condition exhaust temperature and the current working condition exhaust flow are obtained, the rankine cycle controller can query an exhaust electric control three-way valve opening MAP (mapping table) (namely an electric control three-way valve opening mapping table) according to the current working condition exhaust temperature and the current working condition exhaust flow, obtain an exhaust electric control three-way valve opening (namely an electric control three-way valve opening), take the exhaust electric control three-way valve opening as a reference opening of the electric control three-way valve, and then query an evaporator outlet exhaust temperature mapping table according to the current working condition exhaust temperature and the current working condition exhaust flow, so as to obtain a target exhaust outlet temperature.
Meanwhile, the Rankine cycle controller can query a working medium pump rotating speed MAP (namely a working medium pump rotating speed mapping table) according to the current working condition exhaust temperature and the current working condition exhaust flow to obtain the working medium pump rotating speed, and takes the working medium pump rotating speed as the reference rotating speed of the working medium pump, and then queries an evaporator outlet overheat temperature mapping table according to the current working condition exhaust temperature and the current working condition exhaust flow to obtain the target overheat temperature.
Meanwhile, the Rankine cycle controller can inquire a working medium electric control three-way valve opening MAP (namely an electric control three-way valve opening mapping table) according to the current working condition exhaust temperature and the current working condition exhaust flow, obtain the working medium electric control three-way valve opening, take the variable frequency electric control fan rotating speed as the reference rotating speed of the electric control wind speed, and then inquire an evaporator outlet pressure mapping table according to the current working condition exhaust temperature and the current working condition exhaust flow, so as to obtain the target evaporation pressure.
Meanwhile, the Rankine cycle controller can query a variable frequency electric control fan rotating speed MAP (namely a variable frequency electric control fan rotating speed mapping table) according to the current working condition exhaust temperature and the current working condition exhaust flow, obtain the variable frequency electric control fan rotating speed, take the variable frequency electric control fan rotating speed as the reference opening of the working medium electric control three-way valve, and then query a condenser outlet pressure mapping table according to the current working condition exhaust temperature and the current working condition exhaust flow, so as to obtain the target condensing pressure.
Further, the rankine cycle controller may also obtain an actual evaporator outlet discharge temperature corresponding to the target exhaust outlet temperature, obtain an actual superheat temperature corresponding to the target superheat temperature, and obtain an actual expander inlet pressure corresponding to the target evaporating pressure, and obtain an actual condensing pressure corresponding to the target condensing pressure.
When the target exhaust outlet temperature is not equal to the actual evaporator outlet temperature, the Rankine cycle controller can develop closed loop PID control, namely, the target exhaust outlet temperature is adopted as a target value, and the opening of the exhaust electric control three-way valve is regulated until the actual evaporator outlet temperature approaches the target exhaust outlet temperature. When the target overheat temperature is different from the actual overheat temperature, the Rankine cycle controller can develop closed loop PID control, namely, the target overheat temperature is adopted as a target value, and the rotating speed of the working medium pump is regulated until the actual overheat temperature approaches to the target overheat temperature. When the target evaporation pressure is different from the actual expander inlet pressure, the Rankine cycle controller can develop closed-loop PID control, namely, the target evaporation pressure is adopted as a target value, and the opening of the working medium electric control three-way valve is regulated until the actual expander inlet pressure approaches the target evaporation pressure. When the target condensing pressure is different from the actual condensing pressure, the rankine cycle controller can develop closed-loop PID control, namely, the rankine cycle controller can adopt the target condensing pressure as a target value to regulate and control the rotating speed of the cooling fan until the actual condensing pressure approaches the target condensing pressure. The target superheat temperature may be 30K, the target evaporating pressure may be 5MPa, and the target condensing pressure may be 0.25MPa.
It should be understood that, although the steps in the flowcharts related to the embodiments described above are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
Based on the same inventive concept, the embodiment of the application also provides a control device of the engine waste heat recovery device for realizing the control method of the engine waste heat recovery device. The implementation of the solution provided by the device is similar to the implementation described in the above method, so the specific limitation in the embodiments of the control device of the one or more engine waste heat recovery devices provided below may be referred to the limitation of the control method of the engine waste heat recovery device hereinabove, and will not be repeated here.
In one embodiment, as shown in fig. 5, there is provided a control device of an engine waste heat recovery device, comprising: the system comprises a first data acquisition module, a second data acquisition module, a third data acquisition module and a control module, wherein:
the first data obtaining module 502 is configured to obtain a real-time exhaust parameter of the engine in the waste heat recovery device when a working condition of the engine changes during a running process of the vehicle.
A second data acquisition module 504 for obtaining device control parameters and device target parameters based on the real-time exhaust parameters.
And a third data acquisition module 506, configured to acquire a device real-time parameter corresponding to the device target parameter, where the device real-time parameter is a measured parameter related to the heat exchange module in the waste heat recovery device.
And the control module 508 is configured to control the waste heat recovery device based on the device real-time parameter, the device target parameter and the device control parameter if the device real-time parameter and the device target parameter meet a preset device closed-loop control condition.
In one embodiment, the real-time exhaust parameters include a real-time exhaust temperature and a real-time exhaust flow, and the second data acquisition module is further configured to query a preset parameter mapping table based on the real-time exhaust temperature and the real-time exhaust flow to obtain the device control parameters and the device target parameters.
In one embodiment, the parameter mapping table includes at least one control parameter mapping table, and a target parameter mapping table associated with the control parameter mapping table; the second data acquisition module is further configured to query a control parameter mapping table based on the real-time exhaust temperature and the real-time exhaust flow, obtain a device control parameter, and query a target parameter mapping table associated with the control parameter mapping table, obtain a device target parameter.
In one embodiment, the control parameter map includes at least one of an electronically controlled three-way valve opening map, a working medium pump rotation speed map, and a working medium electronically controlled three-way valve opening map, and the second data acquisition module is further configured to, if the control parameter map includes the electronically controlled three-way valve opening map, target parameter map includes an evaporator outlet exhaust gas temperature map associated with the electronically controlled three-way valve opening map, device control parameter is electronically controlled three-way valve opening, device target parameter is target exhaust gas outlet temperature, and further configured to, if the control parameter map includes the electronically controlled three-way valve opening map, target parameter map includes an evaporator outlet exhaust gas temperature map associated with the electronically controlled three-way valve opening map, device control parameter is electronically controlled three-way valve opening, and device target parameter is target exhaust gas outlet temperature; if the control parameter mapping table comprises a working medium pump rotating speed mapping table, the target parameter mapping table comprises an evaporator outlet overheat temperature mapping table associated with the working medium pump rotating speed mapping table, the device control parameter is the working medium pump rotating speed, and the device target parameter is the target overheat temperature; if the control parameter mapping table comprises a working medium electric control three-way valve opening mapping table, the target parameter mapping table comprises an evaporator outlet pressure mapping table associated with the working medium electric control three-way valve opening mapping table, the device control parameter is the working medium electric control three-way valve opening, and the device target parameter is the target evaporation pressure.
In one embodiment, the control parameter mapping table further comprises a variable frequency electric control fan rotation speed mapping table; the second data acquisition module is further configured to, if the control parameter mapping table further includes a variable frequency electronic control fan rotation speed mapping table, further include a condenser outlet pressure mapping table associated with the variable frequency electronic control fan rotation speed mapping table; the control parameter of the device is the rotating speed of the variable-frequency electric control fan, and the target parameter of the device is the target condensing pressure.
In one embodiment, the control module is further configured to determine that a preset closed-loop control condition is met when the target exhaust outlet temperature is not equal to the real-time exhaust outlet temperature, and adjust and control the opening of the electric control three-way valve by taking the target exhaust outlet temperature as a target value, until the real-time exhaust outlet temperature meets a preset exhaust temperature stop condition, when the target exhaust outlet temperature includes the target exhaust outlet temperature, the device control parameter includes the opening of the electric control three-way valve, and the device real-time parameter includes the real-time exhaust outlet temperature; when the target overheat temperature is different from the real-time overheat temperature, determining to meet a preset closed-loop control condition of the device, and regulating and controlling the rotating speed of the working medium pump by taking the target overheat temperature as a target value until the real-time overheat temperature meets a preset overheat temperature stop condition; when the target evaporation pressure is different from the real-time evaporation pressure, determining that a preset closed-loop control condition of the device is met, and regulating and controlling the opening of the working medium electric control three-way valve by taking the target evaporation pressure as a target value until the real-time evaporation pressure meets a preset evaporation pressure stopping condition; when the target condensing pressure is different from the real-time condensing pressure, determining that the preset closed-loop control condition of the device is met, and regulating and controlling the rotating speed of the variable-frequency electric control fan by taking the target condensing pressure as a target value until the real-time condensing pressure meets the preset condensing pressure stopping condition.
The above-described respective modules in the control device of the engine waste heat recovery device may be implemented in whole or in part by software, hardware, and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the controller, or may be stored in software in a memory in the controller, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a controller is provided, which may be a rankine cycle controller of a control subsystem, the internal structure of which may be as shown in fig. 6. The controller includes a processor, memory, input/output interfaces, etc. The memory is connected with the processor, and the processor is connected with the input/output interface. Wherein the processor of the controller is configured to provide computing and control capabilities. The memory of the controller includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input/output interface of the processor is used to exchange information between the processor and other controllers. The computer program, when executed by a processor, implements a method of controlling an engine waste heat recovery device.
It will be appreciated by those skilled in the art that the structure shown in fig. 6 is merely a block diagram of a portion of the structure associated with the present application and is not limiting of the controller to which the present application is applied, and that a particular controller may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a controller is provided that includes a memory having a computer program stored therein and a processor that when executing the computer program performs the steps of the method of controlling an engine waste heat recovery device described above.
In one embodiment, a computer readable storage medium is provided, on which a computer program is stored which, when executed by a processor, implements the steps of the method of controlling an engine waste heat recovery device described above.
In one embodiment, a computer program product is provided comprising a computer program which, when executed by a processor, implements the steps of the method of controlling an engine waste heat recovery device described above.
It will be appreciated by those skilled in the art that the structure shown in fig. 6 is merely a block diagram of a portion of the structure associated with the present application and is not limiting of the controller to which the present application is applied, and that a particular controller may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
It should be noted that, the user information (including, but not limited to, user equipment information, user personal information, etc.) and the data (including, but not limited to, data for analysis, stored data, presented data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party, and the collection, use and processing of the related data are required to comply with the related laws and regulations and standards of the related countries and regions.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the various embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like. The databases referred to in the various embodiments provided herein may include at least one of relational databases and non-relational databases. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic units, quantum computing-based data processing logic units, etc., without being limited thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.

Claims (10)

1. A control method of an engine waste heat recovery device, characterized by comprising:
when the working condition of the engine changes in the running process of the vehicle, acquiring real-time exhaust parameters of the engine in the waste heat recovery device;
acquiring device control parameters and device target parameters based on the real-time exhaust parameters;
acquiring device real-time parameters corresponding to the device target parameters, wherein the device real-time parameters are measured parameters related to a heat exchange module in the waste heat recovery device;
And if the device real-time parameter and the device target parameter meet the preset device closed-loop control condition, controlling the waste heat recovery device based on the device real-time parameter, the device target parameter and the device control parameter.
2. The method of claim 1, wherein the real-time exhaust parameters include a real-time exhaust temperature and a real-time exhaust flow rate;
the obtaining the device control parameter and the device target parameter based on the real-time exhaust parameter includes:
and inquiring a preset parameter mapping table based on the real-time exhaust temperature and the real-time exhaust flow to obtain device control parameters and device target parameters.
3. The method of claim 2, wherein the parameter mapping table comprises at least one control parameter mapping table, and a target parameter mapping table associated with the control parameter mapping table;
the step of inquiring a preset parameter mapping table based on the real-time exhaust temperature and the real-time exhaust flow to obtain a device control parameter and a device target parameter includes:
and inquiring the control parameter mapping table based on the real-time exhaust temperature and the real-time exhaust flow to obtain device control parameters, and inquiring a target parameter mapping table associated with the control parameter mapping table to obtain device target parameters.
4. The method of claim 3, wherein the control parameter map comprises at least one of an electronically controlled three-way valve opening map, a working fluid pump speed map, or a working fluid electronically controlled three-way valve opening map;
if the control parameter mapping table comprises an electric control three-way valve opening mapping table, the target parameter mapping table comprises an evaporator outlet exhaust temperature mapping table associated with the electric control three-way valve opening mapping table, the device control parameter is the electric control three-way valve opening, and the device target parameter is the target exhaust outlet temperature;
if the control parameter mapping table comprises a working medium pump rotating speed mapping table, the target parameter mapping table comprises an evaporator outlet overheat temperature mapping table associated with the working medium pump rotating speed mapping table, the device control parameter is the working medium pump rotating speed, and the device target parameter is the target overheat temperature;
if the control parameter mapping table comprises a working medium electric control three-way valve opening mapping table, the target parameter mapping table comprises an evaporator outlet pressure mapping table associated with the working medium electric control three-way valve opening mapping table, the device control parameter is the working medium electric control three-way valve opening, and the device target parameter is the target evaporation pressure.
5. A method according to claim 3, wherein the control parameter map further comprises a variable frequency electronically controlled fan speed map;
if the control parameter mapping table further comprises a variable frequency electric control fan rotating speed mapping table, the target parameter mapping table further comprises a condenser outlet pressure mapping table associated with the variable frequency electric control fan rotating speed mapping table; the control parameter of the device is the rotating speed of the variable-frequency electric control fan, and the target parameter of the device is the target condensing pressure.
6. The method of claim 1, wherein controlling the waste heat recovery device based on the device real-time parameter, the device target parameter, and the device control parameter if the device real-time parameter and the device target parameter satisfy a preset device closed-loop control condition, comprises:
when the target exhaust outlet temperature is not equal to the real-time exhaust outlet temperature under the conditions that the target device parameter comprises the target exhaust outlet temperature, the control parameter comprises the opening of the electric control three-way valve and the real-time device parameter comprises the real-time exhaust outlet temperature, determining that a preset device closed-loop control condition is met, and regulating and controlling the opening of the electric control three-way valve by taking the target exhaust outlet temperature as a target value until the real-time exhaust outlet temperature meets a preset exhaust temperature stop condition;
When the target overheat temperature is different from the real-time overheat temperature under the conditions that the target overheat temperature of the device comprises the target overheat temperature, the control parameter of the device comprises the rotating speed of the working medium pump and the real-time parameter of the device comprises the real-time overheat temperature, determining that a preset closed-loop control condition of the device is met, and regulating and controlling the rotating speed of the working medium pump by taking the target overheat temperature as a target value until the real-time overheat temperature meets a preset overheat temperature stop condition;
when the target evaporation pressure is different from the real-time evaporation pressure under the conditions that the target evaporation pressure of the device comprises the target evaporation pressure, the control parameter of the device comprises the opening of the working medium electric control three-way valve, and the real-time parameter of the device comprises the real-time evaporation pressure, determining that a preset closed-loop control condition of the device is met, and regulating and controlling the opening of the working medium electric control three-way valve by taking the target evaporation pressure as a target value until the real-time evaporation pressure meets a preset evaporation pressure stopping condition;
when the target condensing pressure is different from the real-time condensing pressure under the conditions that the target condensing pressure is included in the device target parameters, the variable-frequency electric control fan rotating speed is included in the device control parameters, and the real-time condensing pressure is included in the device real-time parameters, determining that a preset closed-loop control condition of the device is met, and adjusting and controlling the variable-frequency electric control fan rotating speed by taking the target condensing pressure as a target value until the real-time condensing pressure meets a preset condensing pressure stopping condition.
7. A control device for engine waste heat recovery, characterized by comprising:
the first data acquisition module is used for acquiring real-time exhaust parameters of the engine in the waste heat recovery device when the working condition of the engine changes in the running process of the vehicle;
the second data acquisition module is used for acquiring device control parameters and device target parameters based on the real-time exhaust parameters;
the third data acquisition module is used for acquiring device real-time parameters corresponding to the device target parameters, wherein the device real-time parameters are measured parameters related to the heat exchange module in the waste heat recovery device;
and the control module is used for controlling the waste heat recovery device based on the device real-time parameter, the device target parameter and the device control parameter if the device real-time parameter and the device target parameter meet the preset device closed-loop control condition.
8. A controller comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any one of claims 1 to 6 when the computer program is executed.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.
10. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.
CN202310243739.4A 2023-03-14 2023-03-14 Control method and device for engine waste heat recovery device and controller Pending CN116146298A (en)

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