CN110905683A - An engine thermal cycle management system and method - Google Patents

An engine thermal cycle management system and method Download PDF

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Publication number
CN110905683A
CN110905683A CN201911264469.5A CN201911264469A CN110905683A CN 110905683 A CN110905683 A CN 110905683A CN 201911264469 A CN201911264469 A CN 201911264469A CN 110905683 A CN110905683 A CN 110905683A
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medium
temperature
cavity
heat pump
flow valve
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CN110905683B (en
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黄继轩
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G5/00—Profiting from waste heat of combustion engines, 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • F01P11/04—Arrangements of liquid pipes or hoses
    • 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
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
    • F02M31/125—Fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/16—Other apparatus for heating fuel
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • 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
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

本发明公开了一种发动机热循环管理系统及方法，利用发动机工作介质流通的管路，在管路管壁设置夹层，在夹层内设置半导体热泵层，半导体热泵层两侧分别为内侧介质腔和外侧介质腔。工作过程中，根据实际所要进行冷却或加热的工作介质，选定所需的工作介质，让各工作介质在内侧介质腔和外侧介质腔流通；再利用温度检测单元去采集各工作介质的温度，由电控单元根据温度控制各工作介质的流量，以调整热量交换，达到加热或冷却的目的，当工作介质之间的热交换不能满足需求时，启动半导体热泵层去辅助加热或冷却，使工作介质获取所需的温度。可见，本发明将发动机各类工作介质的流通管路以及加热冷却系统进行了有机整合，提高了发动机热效率。

Figure 201911264469

The invention discloses an engine thermal cycle management system and method. The pipeline through which the engine working medium circulates is used, an interlayer is arranged on the pipe wall of the pipeline, a semiconductor heat pump layer is arranged in the interlayer, and the two sides of the semiconductor heat pump layer are respectively an inner medium cavity and a External media chamber. During the working process, according to the actual working medium to be cooled or heated, the required working medium is selected, and each working medium is circulated in the inner medium cavity and the outer medium cavity; then the temperature detection unit is used to collect the temperature of each working medium, The flow rate of each working medium is controlled by the electronic control unit according to the temperature to adjust the heat exchange to achieve the purpose of heating or cooling. When the heat exchange between the working medium cannot meet the demand, the semiconductor heat pump layer is activated to assist heating or cooling to make the work The medium acquires the desired temperature. It can be seen that the present invention organically integrates the circulation pipelines and heating and cooling systems of various working media of the engine, thereby improving the thermal efficiency of the engine.

Figure 201911264469

Description

Engine thermal cycle management system and method
Technical Field
The invention relates to the technical field of engines, in particular to an engine thermal cycle management system and method.
Background
When the engine works, due to the working principle and environmental influence of various working media such as gas and liquid of the engine, the temperature change of the working media is large, part of the working media can be solidified in winter (such as urea solution and diesel oil), and meanwhile, part of the working media have extremely high temperature (such as exhaust of the engine, pre-intercooling temperature and the like). In order to maintain proper working temperature of various working media, the working temperature is generally maintained by auxiliary heating of cold media and auxiliary cooling of hot media.
The existing mode has the following defects:
1. low thermal efficiency: most of heat generated by the engine during working is taken away by the cooling system and is not recycled, so that heat loss is caused;
2. the energy consumption is high: the system works independently, energy is consumed for refrigeration and heating, and an energy provider in the whole vehicle only has an engine, so that the load of the engine is increased in the conventional mode, the oil consumption is high, meanwhile, the heating principle of the resistance wire is that electric energy is directly converted into heat energy, namely, the generated heat is related to the consumption of the electric energy, and the heating efficiency is low;
3. all the systems work independently, so that the heating strategy is not convenient to be uniformly and coordinately organized, and meanwhile, under the condition that the engine does not work, the energy of the storage battery is consumed greatly, so that the service life of the storage battery is shortened.
Disclosure of Invention
Aiming at the defects, the technical problems to be solved by the invention are as follows: according to the heat cycle management system and the heat cycle management method for the engine, required media and a heating source or a cooling source are automatically selected according to actual operation conditions, heat exchange is carried out by utilizing a pipeline provided with a semiconductor heat pump layer, and the heat efficiency of the engine is improved.
In order to solve the technical problems, the technical scheme of the invention is as follows:
an engine thermal cycle management system comprises a pipeline through which an engine working medium circulates, wherein an interlayer is arranged on the pipe wall of the pipeline, a semiconductor heat pump layer is arranged in the interlayer, and the interlayer is divided into an inner side medium cavity and an outer side medium cavity which are arranged inside and outside by the semiconductor heat pump layer; an inner medium access pipe and an outer medium access pipe are respectively arranged on the pipeline, the inner medium access pipe is communicated with the inner side medium cavity, a first flow valve is arranged on the inner medium access pipe, the outer medium access pipe is communicated with the outer side medium cavity, and a second flow valve is arranged on the outer medium access pipe; the system further comprises an electric control unit and a temperature detection unit which are electrically connected, the temperature detection unit respectively detects the temperature of the working medium in the pipeline, the temperature of the working medium in the inner side medium cavity and the temperature of the working medium in the outer side medium cavity, the temperature detection unit transmits corresponding temperature signals to the electric control unit, and the electric control unit controls the semiconductor heat pump layer, the first flow valve and the second flow valve according to the temperature signals.
Preferably, the electronic control unit controls the power polarity of the semiconductor heat pump layer according to the working medium circulating in the inner side medium cavity.
Preferably, the electric control unit controls the magnitude of the current flowing through the semiconductor heat pump layer according to the temperature difference between the working media circulating through the inner side medium cavity and the outer side medium cavity.
Preferably, the pipeline is a urea solution circulation pipeline, the working medium circulated in the inner side medium cavity is diesel oil, and the working medium circulated in the outer side medium cavity is water; and then, the hot end of the semiconductor heat pump layer is located in the inner side dielectric cavity, and the cold end of the semiconductor heat pump layer is located on the outer side dielectric cavity side.
Preferably, the temperature detection unit includes a first temperature sensor for detecting a temperature of the working medium flowing through the pipe, a second temperature sensor for detecting a temperature of the working medium flowing through the inner side medium chamber, and a third temperature sensor for detecting a temperature of the working medium flowing through the outer side medium chamber.
Preferably, the temperature detection unit further includes a fourth temperature sensor for detecting an ambient temperature, and the electronic control unit controls the semiconductor heat pump layer, the first flow valve, and the second flow valve based on the ambient temperature collected by the fourth temperature sensor.
An engine thermal cycle management method is applied to the engine thermal cycle management system, the pipeline is a first medium circulation pipeline, the inner side medium cavity circulates a second medium, and the outer side medium cavity circulates a third medium;
the method comprises the following steps:
s10, acquiring the ambient temperature;
s11, judging whether the environmental temperature is matched with a preset temperature value or not;
s12, if the first medium temperature and the second medium temperature are matched, acquiring the first medium temperature and the second medium temperature;
s13, judging whether the temperature of the first medium is within a preset range; judging whether the temperature of the second medium is within a preset range;
s14, if the temperature of the first medium is within the preset range or the temperature of the second medium is not within the preset range, controlling the first flow valve to adjust the flow of the second medium to heat or refrigerate the first medium; if the temperature of the first medium is within a preset range or the temperature of the second medium is within a preset range, acquiring a third medium temperature;
s15, judging whether the temperature of the third medium is within a preset range;
s16, if not, acquiring the temperature difference between the second medium and the third medium; if so, feeding back the temperature of the third medium to a third medium control system;
s17, judging whether the temperature difference is matched with a preset value;
s18, if the first medium and the second medium are matched, controlling a second flow valve to adjust the flow of the third medium so as to heat or refrigerate the first medium and the second medium simultaneously; and if not, closing the second flow valve, and starting the semiconductor heat pump layer to heat or cool.
Preferably, the first medium is urea solution, the second medium is diesel oil, and the third medium is water;
the method comprises the following steps:
s10, acquiring the ambient temperature;
s11, judging whether the environmental temperature is less than a preset value;
s12, if the temperature of the urea solution is lower than the diesel oil temperature, the urea solution temperature and the diesel oil temperature are obtained;
s13, judging whether the temperature of the urea solution is less than a preset value; judging whether the temperature of the diesel oil is less than a preset value or not;
s14, if the urea solution is smaller than a preset value or the diesel oil temperature is not smaller than the preset value, controlling a first flow valve to increase the diesel oil flow to heat the urea solution; if the temperature of the urea solution is less than a preset value or the temperature of the diesel oil is less than a preset value, acquiring the temperature of the water;
s15, judging whether the water temperature is less than a preset value;
s16, if not, acquiring the temperature difference between the diesel oil and the water; if the water temperature is smaller than the preset temperature, feeding back the water temperature to a water temperature control system;
s17, judging whether the temperature difference is larger than a preset value or not;
s18, if the flow rate is larger than the preset value, controlling a second flow valve to increase the water flow rate and simultaneously heating the urea solution and the diesel oil; and if not, closing the second flow valve and starting the semiconductor heat pump layer to heat.
Preferably, in step S16, if the water temperature is less than a predetermined value, the feedback is made to the water temperature control system.
After the technical scheme is adopted, the invention has the beneficial effects that:
the engine thermal cycle management system and the engine thermal cycle management method utilize a pipeline through which an engine working medium circulates, an interlayer is arranged on the wall of the pipeline, a semiconductor heat pump layer is arranged in the interlayer, and an inner side medium cavity and an outer side medium cavity are respectively arranged on two sides of the semiconductor heat pump layer. In the working process of the engine, according to the working medium to be cooled or heated actually, the required working medium is selected, and all the working media are allowed to circulate in the inner side medium cavity and the outer side medium cavity; and when the heat exchange between the working media cannot meet the requirement, the semiconductor heat pump layer is started to assist in heating or cooling, so that the working media obtain the required temperature. Therefore, the invention organically integrates the circulation pipelines of various working media of the engine and the heating and cooling system, thereby improving the heat efficiency of the engine.
The electric control unit controls the power polarity of the semiconductor heat pump layer according to the working medium circulating in the inner side medium cavity; and the cold end and the hot end of the semiconductor heat pump layer are arranged according to actual conditions.
The electric control unit controls the current flowing through the semiconductor heat pump layer according to the temperature difference of the working media circulating in the inner side medium cavity and the outer side medium cavity; heating or refrigeration is carried out according to actual needs, and waste of electric energy is avoided.
The temperature detection unit also comprises a fourth temperature sensor for detecting the ambient temperature, and the electric control unit controls the semiconductor heat pump layer, the first flow valve and the second flow valve based on the ambient temperature collected by the fourth temperature sensor; the invention is reasonable and organically integrated by taking the environmental temperature as reference.
Drawings
FIG. 1 is a schematic block diagram of an engine thermal cycle management system according to the present invention;
FIG. 2 is a flow chart of an engine thermal cycle management method of the present invention;
FIG. 3 is a flow chart of an embodiment;
in the figure: 1-pipeline, 10-inside medium cavity, 11-outside medium cavity, 2-semiconductor heat pump layer, 3-external medium access pipe and 4-internal medium access pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, an engine thermal cycle management system comprises a pipeline 1 through which an engine working medium circulates, wherein an interlayer is arranged on the pipe wall of the pipeline 1, a semiconductor heat pump layer 2 is arranged in the interlayer, and the interlayer is divided into an inner side medium cavity 10 and an outer side medium cavity 11 which are arranged inside and outside by the semiconductor heat pump layer 2; an inner medium access pipe 4 and an outer medium access pipe 3 are respectively arranged on the pipeline 1, the inner medium access pipe 4 is communicated with the inner side medium cavity 10, a first flow valve is arranged on the inner medium access pipe 4, the outer medium access pipe 3 is communicated with the outer side medium cavity 11, and a second flow valve is arranged on the outer medium access pipe 3; the system further comprises an electric control unit and a temperature detection unit which are electrically connected, the temperature detection unit respectively detects the temperature of the working medium flowing in the pipeline 1, the temperature of the working medium flowing in the inner side medium cavity 10 and the temperature of the working medium flowing in the outer side medium cavity 11, the temperature detection unit transmits corresponding temperature signals to the electric control unit, and the electric control unit controls the semiconductor heat pump layer 2, the first flow valve and the second flow valve according to the temperature signals. In this embodiment: the electric control unit controls the power polarity of the semiconductor heat pump layer 2 according to the working medium circulating in the inner side medium cavity 10; the electric control unit controls the magnitude of the current flowing through the semiconductor heat pump layer 2 according to the temperature difference of the working media flowing through the inner side medium cavity 10 and the outer side medium cavity 11, so that the semiconductor heat pump layer 2 is heated or cooled in an auxiliary mode.
According to the engine thermal cycle management system, in the working process of an engine, required working media including the quantity of the working media are selected according to the working media to be cooled or heated actually, the working media circulate in the inner side medium cavity 10 and the outer side medium cavity 11, the working media in the inner side medium cavity 10 exchange heat with the working media in the pipeline 1, the heat or the cold of the working media in the outer side medium cavity 11 is rapidly transmitted to the inner side medium cavity 10 by the semiconductor heat pump layer 2, the inner side medium cavity 10 exchanges heat with the working media in the pipeline 1, and the semiconductor heat pump layer 2 assists in rapidly exchanging heat, so that the problem that each working medium is independently heated or cooled in the prior art is solved, and the heat of each working medium is interactively exchanged.
The invention collects the temperature of each working medium by using the temperature detection unit, the temperature is transmitted to the electric control unit, and the electric control unit controls the flow of each working medium according to the temperature to adjust heat exchange so as to achieve the aim of heating or cooling. And similarly, when the heat exchange between the working media cannot meet the requirement, the semiconductor heat pump layer 2 is started to assist in heating or cooling, so that the working media can obtain the required temperature. Therefore, the invention organically integrates the circulation pipelines 1 of various working media of the engine and the heating and cooling system, improves the heat efficiency of the engine, avoids the waste of electric energy and reduces the influence on the service life of the battery.
In the present embodiment, the temperature detection unit includes a first temperature sensor for detecting the temperature of the working medium flowing through the pipeline 1, a second temperature sensor for detecting the temperature of the working medium flowing through the inner medium chamber 10, and a third temperature sensor for detecting the temperature of the working medium flowing through the outer medium chamber 11. Furthermore, the temperature detection unit further comprises a fourth temperature sensor for detecting the ambient temperature, the electronic control unit controls the semiconductor heat pump layer 2, the first flow valve and the second flow valve based on the ambient temperature collected by the fourth temperature sensor, and selection of each working medium is more reasonable through the ambient temperature.
The following are specifically mentioned: in this embodiment, a urea solution circulation pipeline 1 is taken as an example for description, and since the specific heat capacities of diesel oil and urea solution are similar, the working medium circulated in the inner side medium cavity 10 is designed to be diesel oil, and the working medium circulated in the outer side medium cavity 11 is designed to be water; then the hot end of the semiconductor heat pump layer 2 is located in the inner dielectric cavity 10, and the cold end of the semiconductor heat pump layer 2 is located on the outer dielectric cavity 11 side.
As shown in fig. 1, when the temperature of the urea solution is lower than a preset value, the electronic control unit controls the first flow valve to increase the flow rate of the diesel oil, so that more heat carried by the diesel oil is transferred to the urea solution; if the temperature of the urea solution is higher than the preset value, the flow of the diesel oil can be reduced or closed, so that the urea solution is not increased any more. After the diesel oil flow is increased, the temperature of the urea solution is still smaller than a preset value, the second flow valve can be controlled, the water flow is increased, and the heat of water is quickly transferred to the diesel oil and the urea solution under the action of the semiconductor heat pump layer 2 to heat the diesel oil and the urea solution. When the temperature difference between the water and the diesel oil is smaller than a preset value, the flow of the water is increased, the diesel oil and the urea solution are not heated up quickly, at the moment, the electric control unit closes the second flow valve, the current of the semiconductor heat pump layer 2 is controlled, and the semiconductor heat pump layer 2 heats the diesel oil and the urea solution, so that the aim of quickly heating up is fulfilled.
Example two:
as shown in fig. 2 and fig. 3, an engine thermal cycle management method is applied to the engine thermal cycle management system, where the pipe is a first medium circulation pipe, an inner side medium cavity circulates a second medium, and an outer side medium cavity circulates a third medium;
the method comprises the following steps:
s10, acquiring the ambient temperature;
s11, judging whether the environmental temperature is matched with a preset temperature value or not; the conditions comprise that the environment temperature is greater than a preset value and the environment temperature is less than the preset value, and the calibration is carried out according to the actual environment.
S12, if the first medium temperature and the second medium temperature are matched, acquiring the first medium temperature and the second medium temperature;
s13, judging whether the temperature of the first medium is within a preset range; judging whether the temperature of the second medium is within a preset range;
s14, if the temperature of the first medium is within the preset range or the temperature of the second medium is not within the preset range, controlling the first flow valve to adjust the flow of the second medium to heat or refrigerate the first medium; if the temperature of the first medium is within a preset range or the temperature of the second medium is within a preset range, acquiring a third medium temperature;
s15, judging whether the temperature of the third medium is within a preset range;
s16, if not, acquiring the temperature difference between the second medium and the third medium; if so, feeding back the temperature of the third medium to a third medium control system;
s17, judging whether the temperature difference is matched with a preset value;
s18, if the first medium and the second medium are matched, controlling a second flow valve to adjust the flow of the third medium so as to heat or refrigerate the first medium and the second medium simultaneously; and if not, closing the second flow valve and starting the semiconductor heat pump layer to heat or cool.
By adopting the engine thermal cycle management method, the flow rates of the second medium and the third medium are adjusted in real time according to the temperature acquired in real time, so that the heat among the first medium, the second medium and the third medium is reasonably utilized, and the heat is rapidly transferred by virtue of the semiconductor heat pump layer, so that the heat transfer efficiency is improved; especially when the heat quantity among the working media is not enough to meet the requirement, the semiconductor heat pump layer can also carry out auxiliary refrigeration and heating. The method of the invention is easy to realize and the data transmission is stable and reliable.
As shown in fig. 1 and 3, in the present embodiment, the first medium is a urea solution, the second medium is diesel, and the third medium is water; an engine thermal cycle management method comprising the steps of:
s10, acquiring the ambient temperature;
s11, judging whether the environmental temperature is less than a preset value;
s12, if the temperature of the urea solution is lower than the diesel oil temperature, the urea solution temperature and the diesel oil temperature are obtained;
s13, judging whether the temperature of the urea solution is less than a preset value; judging whether the temperature of the diesel oil is less than a preset value or not;
s14, if the urea solution is smaller than a preset value or the diesel oil temperature is not smaller than the preset value, controlling a first flow valve to increase the diesel oil flow to heat the urea solution; if the temperature of the urea solution is less than a preset value or the temperature of the diesel oil is less than a preset value, acquiring the temperature of the water;
s15, judging whether the water temperature is less than a preset value;
s16, if not, acquiring the temperature difference between the diesel oil and the water; if the water temperature is smaller than the preset temperature, feeding back the water temperature to a water temperature control system;
s17, judging whether the temperature difference is larger than a preset value or not;
s18, if the flow rate is larger than the preset value, controlling a second flow valve to increase the water flow rate and simultaneously heating the urea solution and the diesel oil; and if not, closing the second flow valve and starting the semiconductor heat pump layer to heat.
In summary, compared with the prior art, the engine thermal cycle management system and method of the present invention have the following advantages:
the heat efficiency of the whole machine is improved: the semiconductor heat pump layer can rapidly transfer heat;
the heating efficiency is high: the principle of the heat pump is that heat is absorbed from the cold end and transferred to the hot end to be released, and meanwhile, the heat generated by the heat pump is released at the hot end after the heat pump is electrified, so that the heating efficiency is more than 200%;
energy conservation: under the condition of generating the same heat, the power consumption is reduced by more than 50 compared with the mode of heating by using a resistance wire;
the service life of the whole vehicle wire harness is prolonged: heating current in the whole vehicle wire harness is reduced, aging time is prolonged, and service life is prolonged;
and the EMC index of the whole vehicle is improved: the EMC index of the whole vehicle is correspondingly improved due to the fact that the heating current is reduced;
the heat between each liquid medium is effectively transferred, the heat loss is reduced, and the heat efficiency of the whole machine is improved.
The above-described preferred embodiments of the present invention are not intended to limit the present invention, and any modifications, equivalent improvements in engine thermal cycle management systems and methods, which come within the spirit and principle of the present invention, are intended to be included within the scope of the present invention.

Claims (9)

1.一种发动机热循环管理系统，包括发动机工作介质流通的管路，其特征在于，所述管路管壁设置有夹层，所述夹层内设置有半导体热泵层，所述半导体热泵层将所述夹层分成内外设置的内侧介质腔和外侧介质腔；1. An engine thermal cycle management system, comprising a pipeline in which an engine working medium circulates, characterized in that the pipeline wall is provided with an interlayer, and a semiconductor heat pump layer is provided in the interlayer, and the semiconductor heat pump layer will The interlayer is divided into an inner medium cavity and an outer medium cavity arranged inside and outside; 所述管路上分别设置有内介质接入管和外介质接入管，所述内介质接入管与所述内侧介质腔连通，且所述内介质接入管上设置有第一流量阀，所述外介质接入管与所述外侧介质腔连通，且所述外介质接入管上设置有第二流量阀；An inner medium inlet pipe and an outer medium inlet pipe are respectively arranged on the pipeline, the inner medium inlet pipe is communicated with the inner medium cavity, and a first flow valve is arranged on the inner medium inlet pipe, The outer medium inlet pipe is communicated with the outer medium cavity, and the outer medium inlet pipe is provided with a second flow valve; 所述系统还包括电连接的电控单元和温度检测单元，所述温度检测单元分别检测所述管路内工作介质温度，所述内侧介质腔内工作介质温度和所述外侧介质腔内工作介质温度，所述温度检测单元传输对应的温度信号给所述电控单元，所述电控单元根据温度信号控制所述半导体热泵层、所述第一流量阀和所述第二流量阀。The system further includes an electrical control unit and a temperature detection unit that are electrically connected, and the temperature detection unit respectively detects the temperature of the working medium in the pipeline, the temperature of the working medium in the inner medium cavity and the working medium in the outer medium cavity. temperature, the temperature detection unit transmits a corresponding temperature signal to the electronic control unit, and the electronic control unit controls the semiconductor heat pump layer, the first flow valve and the second flow valve according to the temperature signal. 2.根据权利要求1所述的发动机热循环管理系统，其特征在于，所述电控单元根据所述内侧介质腔流通的工作介质，控制所述半导体热泵层的电源极性。2 . The engine thermal cycle management system according to claim 1 , wherein the electronic control unit controls the power supply polarity of the semiconductor heat pump layer according to the working medium circulating in the inner medium cavity. 3 . 3.根据权利要求1所述的发动机热循环管理系统，其特征在于，所述电控单元根据所述内侧介质腔和所述外侧介质腔流通的工作介质温差，控制流过所述半导体热泵层电流的大小。3 . The engine thermal cycle management system according to claim 1 , wherein the electronic control unit controls the flow through the semiconductor heat pump layer according to the temperature difference of the working medium circulating in the inner medium cavity and the outer medium cavity. 4 . the magnitude of the current. 4.根据权利要求2所述的发动机热循环管理系统，其特征在于，所述管路为尿素溶液流通管路，所述内侧介质腔流通的工作介质为柴油，所述外侧介质腔流通的工作介质为水；则，所述半导体热泵层的热端位于所述内侧介质腔，所述半导体热泵层的冷端位于所述外侧介质腔侧。4 . The engine thermal cycle management system according to claim 2 , wherein the pipeline is a urea solution circulation pipeline, the working medium circulating in the inner medium cavity is diesel oil, and the working medium circulating in the outer medium cavity is diesel oil. 4 . The medium is water; then, the hot end of the semiconductor heat pump layer is located in the inner medium cavity, and the cold end of the semiconductor heat pump layer is located at the side of the outer medium cavity. 5.根据权利要求1至4任一项所述的发动机热循环管理系统，其特征在于，所述温度检测单元包括用于检测所述管路流通工作介质温度的第一温度传感器、用于检测所述内侧介质腔流通工作介质温度的第二温度传感器、以及用于检测所述外侧介质腔流通工作介质温度的第三温度传感器。5. The engine thermal cycle management system according to any one of claims 1 to 4, wherein the temperature detection unit comprises a first temperature sensor for detecting the temperature of the working medium circulating in the pipeline, for detecting A second temperature sensor for the temperature of the working medium flowing in the inner medium cavity, and a third temperature sensor for detecting the temperature of the working medium flowing in the outer medium cavity. 6.根据权利要求5所述的发动机热循环管理系统，其特征在于，所述温度检测单元还包括用于检测环境温度的第四温度传感器，所述电控单元基于所述第四温度传感器采集的环境温度，控制所述半导体热泵层、所述第一流量阀和所述第二流量阀。6 . The engine thermal cycle management system according to claim 5 , wherein the temperature detection unit further comprises a fourth temperature sensor for detecting ambient temperature, and the electronic control unit collects data based on the fourth temperature sensor. 7 . to control the semiconductor heat pump layer, the first flow valve and the second flow valve. 7.一种发动机热循环管理方法，其特征在于，应用于权利要求1至6任一项所述的发动机热循环管理系统，所述管路为第一介质流通管路，所述内侧介质腔流通第二介质，所述外侧介质腔流通第三介质；7 . An engine thermal cycle management method, characterized in that, when applied to the engine thermal cycle management system according to any one of claims 1 to 6 , the pipeline is a first medium circulation pipeline, and the inner medium cavity is The second medium circulates, and the outer medium cavity circulates the third medium; 所述方法，包括以下步骤：The method includes the following steps: S10、获取环境温度；S10. Obtain the ambient temperature; S11、判断环境温度是否与预设定温度值相匹配；S11. Determine whether the ambient temperature matches the preset temperature value; S12、如果匹配，则获取第一介质温度和第二介质温度；S12. If they match, obtain the temperature of the first medium and the temperature of the second medium; S13、判断第一介质温度是否在预设定范围内；S13, judging whether the temperature of the first medium is within a preset range; 判断第二介质温度是否在预设定范围内；Determine whether the temperature of the second medium is within the preset range; S14、如果第一介质温度在预设定范围内或第二介质温度不在预设定范围内，则控制第一流量阀，来调整第二介质流量加热或制冷第一介质；S14. If the temperature of the first medium is within the preset range or the temperature of the second medium is not within the preset range, control the first flow valve to adjust the flow rate of the second medium to heat or cool the first medium; 如果第一介质温度在预设定范围内或第二介质温度在预设定范围内，则，获取第三介质温度；If the temperature of the first medium is within the preset range or the temperature of the second medium is within the preset range, obtaining the temperature of the third medium; S15、判断第三介质温度是否在预设定范围内；S15, judging whether the temperature of the third medium is within a preset range; S16、如果不在，则获取第二介质和第三介质的温差；S16, if not, obtain the temperature difference between the second medium and the third medium; S17、判断温差是否与预设定值相匹配；S17, judging whether the temperature difference matches the preset value; S18、如果匹配，控制第二流量阀，来调整第三介质流量以同时加热或制冷第一介质和第二介质；S18. If matching, control the second flow valve to adjust the flow of the third medium to heat or cool the first medium and the second medium at the same time; 如果不匹配，则关闭所述第二流量阀，启动所述半导体热泵层加热或制冷。If it does not match, the second flow valve is closed to activate the heating or cooling of the semiconductor heat pump layer. 8.根据权利要求7所述的发动机热循环管理方法，其特征在于，所述第一介质为尿素溶液，所述第二介质为柴油，所述第三介质为水；8 . The engine thermal cycle management method according to claim 7 , wherein the first medium is urea solution, the second medium is diesel oil, and the third medium is water; 8 . 所述方法，包括以下步骤：The method includes the following steps: S10、获取环境温度；S10. Obtain the ambient temperature; S11、判断环境温度是否小于预设定值；S11. Determine whether the ambient temperature is less than a preset value; S12、如果小于，则获取尿素溶液温度和柴油温度；S12, if it is less than, obtain the temperature of urea solution and the temperature of diesel oil; S13、判断尿素溶液温度是否小于预设定值；S13, determine whether the temperature of the urea solution is less than a preset value; 判断柴油温度是否小于预设定值；Determine whether the diesel temperature is less than the preset value; S14、如果尿素溶液小于预设定值或柴油温度不小于预设定值，则控制第一流量阀，来加大柴油流量加热尿素溶液；S14, if the urea solution is less than the preset value or the diesel temperature is not less than the preset value, then control the first flow valve to increase the diesel flow to heat the urea solution; 如果尿素溶液温度小于预设定值或柴油温度小于预设定值，则，获取水温度；If the temperature of the urea solution is less than the preset value or the temperature of the diesel oil is less than the preset value, then, obtain the water temperature; S15、判断水温度是否小于预设定值；S15, judging whether the water temperature is less than a preset value; S16、如果不小于，则获取柴油和水的温差；S16. If not less than, obtain the temperature difference between diesel and water; S17、判断温差是否大于预设定值；S17, judging whether the temperature difference is greater than a preset value; S18、如果大于，控制第二流量阀，加大水流量，同时加热尿素溶液和柴油；S18, if it is greater than that, control the second flow valve, increase the water flow, and heat the urea solution and diesel oil at the same time; 如果不大于，则关闭所述第二流量阀，启动所述半导体热泵层加热。If not, close the second flow valve and start the heating of the semiconductor heat pump layer. 9.根据权利要求8所述的发动机热循环管理方法，其特征在于，所述步骤S16中，如果水温小于预设定值，则反馈至水温控制系统。9 . The engine thermal cycle management method according to claim 8 , wherein in the step S16 , if the water temperature is less than a preset value, it is fed back to the water temperature control system. 10 .
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