CN112031950B - Automobile waste heat recovery control method, electronic equipment and system - Google Patents
Automobile waste heat recovery control method, electronic equipment and system Download PDFInfo
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- CN112031950B CN112031950B CN202010940772.9A CN202010940772A CN112031950B CN 112031950 B CN112031950 B CN 112031950B CN 202010940772 A CN202010940772 A CN 202010940772A CN 112031950 B CN112031950 B CN 112031950B
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- 238000011084 recovery Methods 0.000 title claims abstract description 77
- 239000002918 waste heat Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 427
- 239000007789 gas Substances 0.000 claims abstract description 122
- 239000007788 liquid Substances 0.000 claims abstract description 119
- 239000000110 cooling liquid Substances 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 230000001276 controlling effect Effects 0.000 claims description 34
- 230000015654 memory Effects 0.000 claims description 18
- 238000010257 thawing Methods 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 238000009825 accumulation Methods 0.000 abstract description 12
- 238000004378 air conditioning Methods 0.000 description 8
- 239000002826 coolant Substances 0.000 description 6
- 238000010792 warming Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000008236 heating water Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 239000010845 automotive waste Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 150000002678 macrocyclic compounds Chemical class 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
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- 238000010295 mobile communication Methods 0.000 description 1
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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
- F02G5/02—Profiting from waste heat of exhaust gases
-
- 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
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- 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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Abstract
The invention discloses an automobile waste heat recovery control method, electronic equipment and a system, wherein the method comprises the following steps: detecting the running state of an automobile engine, and if the engine runs, detecting the water temperature of the engine; and adjusting the exhaust power of the exhaust gas discharged to the exhaust gas heat exchanger according to the temperature of the water in the engine, wherein an exhaust pipe of the engine is communicated with an air inlet end of the exhaust gas heat exchanger, and a cooling liquid channel of the engine, a liquid channel of the exhaust gas heat exchanger and a heating device for adjusting the temperature of a passenger compartment of the automobile are connected in series to form a liquid channel loop. The invention realizes the accurate control of heat recovery and avoids the damage risk caused by heat accumulation. Meanwhile, different flow control is set by combining the degree of waste heat recovery, and the optimal recovery control is realized. And waste heat recovery is carried out by combining the functional requirements of different operation modes of the air conditioner, so that the optimal heat utilization is realized. Finally, by setting the exhaust heat recovery control after the engine is stopped, the heat is recovered to the maximum extent, and the heat accumulation inside the EHRS can be reduced.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an automobile waste heat recovery control method, electronic equipment and an automobile waste heat recovery control system.
Background
During the running of the automobile, the engine can discharge waste heat. In the prior art, a waste heat recovery system is utilized to improve oil consumption and the air-conditioning warm air effect.
Existing waste Heat Recovery (EHRS) is generally used for waste Heat power generation or heating water using waste Heat for engine warm-up and air conditioning warm-up.
However, the use of waste heat for power generation is costly, resulting in a low cost/performance ratio.
Therefore, in the prior art, the waste heat recovery is mostly used for heating water by using waste heat for engine warming and air conditioning warming.
However, the existing technology for heating water using waste heat for engine warming and air-conditioning warming has the following problems:
1. the warm air loop is connected with the EHRS loop in parallel, and the warm air need to be controlled by a valve and a water pump independently.
However, the conventional electronic control technology cannot perform the exhaust heat recovery after the engine is stopped. In the prior art, the three-way valve is used for connecting the warm air loop and the EHRS loop, so that the on-off of water can be controlled only by the switch, but the on-off of steam cannot be controlled. After the warm-up is finished, when the parking water is static, the heat of the EHRS can not be taken away, the water can be heated by the waste heat, and the internal water is easy to boil to generate heat damage.
2. Without the control logic of the EHRS on the exhaust side, control switching between supply and demand for exhaust heat recovery cannot be realized.
3. The existing mechanical control waste heat recovery is mechanical control, only gas is controlled, and water is not controlled. When the preset water temperature is reached, the wax valve is heated, the exhaust valve is pushed up through expansion with heat and contraction with cold, and the recovery is not carried out. However, in this way, water does not flow when the engine is not running. Therefore, only the exhaust heat recovery during the operation of the engine can be realized, and the exhaust heat recovery after the engine stop and the air-conditioning warm air demand cannot be realized.
Therefore, existing technologies for heating water using waste heat for engine warm-up and air-conditioning warm-up are complex systems and involve a risk of damage due to heat accumulation. Meanwhile, the prior art lacks recovery control after the engine is stopped.
Disclosure of Invention
In view of the above, it is necessary to provide an automobile waste heat recovery control method, an electronic device, and a system, which solve the technical problems of the prior art that the system is complicated and the risk of damage due to heat accumulation exists in the utilization of automobile exhaust gas.
The invention provides an automobile waste heat recovery control method, which comprises the following steps:
detecting the running state of an automobile engine, and if the engine runs, detecting the water temperature of the engine;
and adjusting the exhaust power of the exhaust gas discharged to the exhaust gas heat exchanger according to the temperature of the water in the engine, wherein an exhaust pipe of the engine is communicated with the air inlet end of the exhaust gas heat exchanger, and a cooling liquid channel of the engine, a liquid channel of the exhaust gas heat exchanger and a heating device for adjusting the temperature of a passenger compartment of the automobile are connected in series to form a liquid channel loop.
Further, the adjusting of the exhaust power of the exhaust gas discharged to the exhaust gas heat exchanger according to the temperature of the engine water specifically includes:
detecting a current operation mode of the automobile air conditioner;
acquiring a corresponding table of engine water temperature and exhaust power of the current operation mode, wherein in the corresponding table of the engine water temperature and the exhaust power, the exhaust power corresponding to the engine water temperature with high temperature is less than or equal to the exhaust power corresponding to the engine water temperature with low temperature;
according to the engine water temperature and exhaust power correspondence table, determining exhaust power corresponding to the current engine water temperature as exhaust power to be adjusted;
and adjusting the exhaust power of an electronic exhaust valve for exhausting the exhaust gas to the exhaust gas heat exchanger to be the exhaust power to be adjusted.
Further, still include:
detecting the engine speed if the engine is running;
and adjusting the power of a water pump of the electronic water pump for driving the liquid in the liquid channel loop to flow according to the rotating speed of the engine.
Furthermore, the adjusting of the power of the water pump of the electronic water pump for driving the liquid in the liquid passage loop to flow according to the engine speed specifically includes:
detecting the current running mode of an automobile air conditioner and the current water temperature of an engine;
acquiring an engine rotating speed and water pump power corresponding table related to the current operation mode and the current water temperature of the engine, wherein in the engine rotating speed and water pump power corresponding table, the water pump power corresponding to the engine rotating speed with high rotating speed is less than or equal to the water pump power corresponding to the engine rotating speed with low rotating speed;
according to the engine rotating speed and water pump power correspondence table, determining water pump power corresponding to the current rotating speed of the engine as water pump power to be adjusted;
and adjusting the power of a water pump of the electronic water pump for driving the liquid in the liquid channel loop to flow as the power of the water pump to be adjusted.
Still further, the obtaining a correspondence table of engine speed and water pump power with respect to the current operation mode and with respect to the current water temperature of the engine, where in the correspondence table of engine speed and water pump power, water pump power corresponding to an engine speed with a high speed is less than or equal to water pump power corresponding to an engine speed with a low speed specifically includes:
determining a temperature threshold according to the operating mode;
if the current water temperature of the engine is larger than the temperature threshold value, selecting an engine rotating speed and water pump power corresponding table in a high temperature state, otherwise selecting an engine rotating speed and water pump power corresponding table in a low temperature state, wherein in the engine rotating speed and water pump power corresponding table, the water pump power corresponding to the engine rotating speed with high rotating speed is smaller than or equal to the water pump power corresponding to the engine rotating speed with low rotating speed, and for the same engine rotating speed, the water pump power corresponding to the engine rotating speed and water pump power corresponding table in the high temperature state is smaller than or equal to the water pump power corresponding to the engine rotating speed and water pump power corresponding table in the low temperature state.
Further, still include:
if the engine is closed, controlling an electronic exhaust valve which discharges the exhaust gas to the exhaust gas heat exchanger to be kept open for a preset exhaust valve operation time period and then be closed; and/or
If the engine is closed, detecting the current running mode of the automobile air conditioner;
and if the current operation mode is that the air conditioner is closed, controlling the electronic water pump driving the liquid in the liquid channel loop to flow to operate according to the water pump power of the air conditioner closing mode for a preset water pump operation time period and then closing, otherwise, controlling the electronic water pump driving the liquid in the liquid channel loop to flow to operate according to the water pump power of the current operation mode.
The present invention provides an automobile waste heat recovery control electronic device, including:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to at least one of the processors; wherein,
the memory stores instructions executable by at least one of the processors to enable the at least one of the processors to:
detecting the running state of an automobile engine, and if the engine runs, detecting the water temperature of the engine;
and adjusting the exhaust power of exhaust gas discharged to an exhaust gas heat exchanger according to the temperature of the water in the engine, wherein an exhaust pipe of the engine is communicated with an air inlet end of the exhaust gas heat exchanger, and a cooling liquid channel of the engine, a liquid channel of the exhaust gas heat exchanger and a heating device for adjusting the temperature of a passenger compartment of the automobile are connected in series to form a liquid channel loop.
Further, the adjusting of the exhaust power of the exhaust gas discharged to the exhaust gas heat exchanger according to the temperature of the engine water specifically includes:
detecting a current operation mode of the automobile air conditioner;
acquiring an engine water temperature and exhaust power corresponding table related to the current operation mode, wherein in the engine water temperature and exhaust power corresponding table, the exhaust power corresponding to the engine water temperature with high temperature is less than or equal to the exhaust power corresponding to the engine water temperature with low temperature;
according to the engine water temperature and exhaust power correspondence table, determining exhaust power corresponding to the current engine water temperature as exhaust power to be adjusted;
and adjusting the exhaust power of an electronic exhaust valve for exhausting the exhaust gas to the exhaust gas heat exchanger to be the exhaust power to be adjusted.
Further, the method also comprises the following steps:
detecting the engine speed if the engine is running;
and adjusting the power of a water pump of an electronic water pump for driving the liquid of the liquid passage loop to flow according to the rotating speed of the engine.
Furthermore, the adjusting of the power of the water pump of the electronic water pump for driving the liquid in the liquid passage loop to flow according to the engine speed specifically includes:
detecting the current running mode of the automobile air conditioner and the current water temperature of an engine;
acquiring an engine rotating speed and water pump power corresponding table related to the current operation mode and the current water temperature of the engine, wherein in the engine rotating speed and water pump power corresponding table, the water pump power corresponding to the engine rotating speed with high rotating speed is less than or equal to the water pump power corresponding to the engine rotating speed with low rotating speed;
according to the engine rotating speed and water pump power correspondence table, determining water pump power corresponding to the current rotating speed of the engine as water pump power to be adjusted;
and adjusting the power of a water pump of an electronic water pump for driving the liquid of the liquid channel loop to be the power of the water pump to be adjusted.
Still further, the obtaining a correspondence table of engine speed and water pump power with respect to the current operation mode and with respect to the current water temperature of the engine, where in the correspondence table of engine speed and water pump power, water pump power corresponding to an engine speed with a high speed is less than or equal to water pump power corresponding to an engine speed with a low speed specifically includes:
determining a temperature threshold according to the operating mode;
if the current water temperature of the engine is larger than the temperature threshold value, selecting an engine rotating speed and water pump power corresponding table in a high temperature state, otherwise selecting an engine rotating speed and water pump power corresponding table in a low temperature state, wherein in the engine rotating speed and water pump power corresponding table, the water pump power corresponding to the engine rotating speed with high rotating speed is smaller than or equal to the water pump power corresponding to the engine rotating speed with low rotating speed, and for the same engine rotating speed, the water pump power corresponding to the engine rotating speed and water pump power corresponding table in the high temperature state is smaller than or equal to the water pump power corresponding to the engine rotating speed and water pump power corresponding table in the low temperature state.
Further, still include:
if the engine is closed, controlling an electronic exhaust valve which discharges the exhaust gas to the exhaust gas heat exchanger to be kept open for a preset exhaust valve operation time period and then be closed; and/or
If the engine is closed, detecting the current running mode of the automobile air conditioner;
and if the current operation mode is that the air conditioner is closed, controlling the electronic water pump driving the liquid in the liquid channel loop to flow to operate according to the water pump power of the air conditioner closing mode for a preset water pump operation time period and then closing, otherwise, controlling the electronic water pump driving the liquid in the liquid channel loop to flow to operate according to the water pump power of the current operation mode.
The present invention provides an automobile waste heat recovery system, comprising: engine, waste gas heat exchanger, be used for adjusting warm braw device, electron discharge valve of car passenger cabin temperature and as before control electronic equipment, the coolant liquid way of engine the liquid way of waste gas heat exchanger and the warm braw liquid way at warm braw device place is established ties and is formed the liquid way return circuit, control electronic equipment with electron discharge valve communication connection, electron discharge valve one end and the blast pipe intercommunication of engine, the other end with waste gas heat exchanger's air flue intercommunication.
According to the invention, the exhaust power of the exhaust gas discharged to the exhaust gas heat exchanger is regulated according to the water temperature of the engine, so that the accurate control of heat recovery is realized, and the damage risk caused by heat accumulation is avoided. Meanwhile, different flow control is set by combining the degree of waste heat recovery, and the optimal recovery control is realized. And waste heat recovery is carried out by combining the functional requirements of different operation modes of the air conditioner, so that the optimal heat utilization is realized. Finally, by setting the exhaust heat recovery control after the engine is stopped, the heat is recovered to the maximum extent, and the heat accumulation inside the EHRS can be reduced.
Drawings
Fig. 1 is a flowchart illustrating an exemplary method for controlling waste heat recovery of a vehicle;
FIG. 2 is a schematic diagram of an automotive waste heat recovery system of the present invention;
FIG. 3 is a flowchart illustrating a method for controlling waste heat recovery of a vehicle according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating operation of a method for controlling waste heat recovery of an automobile during operation of the engine according to a preferred embodiment of the present invention;
FIG. 5 is a flowchart illustrating the operation of the vehicle waste heat recovery control method when the engine is turned off according to the preferred embodiment of the present invention;
fig. 6 is a schematic diagram of a hardware structure of an electronic device for controlling automobile waste heat recovery according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
Example one
Fig. 1 is a flowchart illustrating an operation of a method for controlling waste heat recovery of an automobile according to an embodiment of the present invention, including:
step S101, detecting the running state of an automobile engine, and if the engine runs, detecting the water temperature of the engine;
and S102, adjusting exhaust power of exhaust gas discharged to an exhaust gas heat exchanger according to the temperature of the water in the engine, wherein an exhaust pipe of the engine is communicated with an air inlet end of the exhaust gas heat exchanger, and a cooling liquid channel of the engine, a liquid channel of the exhaust gas heat exchanger and a heating device for adjusting the temperature of a passenger compartment of the automobile are connected in series to form a liquid channel loop.
Specifically, the present invention is applied to an Electronic Control Unit (ECU) for a vehicle.
When it is determined that the engine is running in step S101, the temperature of the engine water is detected, and then step S102 is executed to adjust the exhaust power for discharging the exhaust gas to the exhaust gas heat exchanger based on the temperature of the engine water.
The present invention can be applied to the exhaust heat recovery system as shown in fig. 2. The waste heat recovery system includes: engine 1, exhaust gas heat exchanger 2, be used for adjusting warm braw device 3, electron discharge valve 4 and the control electronics of car passenger cabin temperature, the coolant liquid way of engine 1 the liquid way of exhaust gas heat exchanger 2 and the warm braw liquid way that warm braw device 3 belonged to establishes ties and forms the liquid way return circuit, control electronics with electron discharge valve 4 communication connection, electron discharge valve 4 one end and engine 1's blast pipe intercommunication, the other end with exhaust gas heat exchanger 2's air flue intercommunication.
The control electronics executes a work flow as shown in fig. 1, and adjusts the exhaust power of the exhaust gas discharged to the exhaust gas heat exchanger 2, i.e. the exhaust power of the electronic exhaust valve 4, in accordance with the engine water temperature. Specifically, the exhaust power for discharging the exhaust gas to the exhaust gas heat exchanger 2 can be adjusted by adjusting the duty ratio outputted to the electronic exhaust valve 4, thereby controlling the valve opening of the electronic exhaust valve 4, that is, controlling the amount of the exhaust gas discharged to the exhaust gas heat exchanger 2.
The exhaust gas heat exchanger 2 comprises an air passage and a liquid passage, wherein the air passage receives the exhaust gas, and the heat is exchanged in the exhaust gas heat exchanger 2 due to the heat carried in the exhaust gas, and the heat is transferred to the liquid, such as water, in the liquid passage of the exhaust gas heat exchanger 2. Since the exhaust gas heat exchanger 2 is connected in series to a liquid path circuit formed by the coolant liquid path of the engine 1 and the warm air liquid path in which the warm air device 3 is located, the liquid in the liquid path of the exhaust gas heat exchanger 2 transfers heat to the liquid path circuit and is used by the warm air device 3. The heater 3 may be an air conditioning heater core to heat the passenger compartment.
According to the invention, the exhaust power of the exhaust gas discharged to the exhaust gas heat exchanger is regulated according to the water temperature of the engine, so that the accurate control of heat recovery is realized, and the damage risk caused by heat accumulation is avoided.
Example two
Fig. 3 is a flowchart illustrating an operation of a method for controlling waste heat recovery of an automobile according to an embodiment of the present invention, including:
step S301, detecting the running state of an automobile engine, and if the engine runs, detecting the water temperature of the engine;
step S302, detecting the current operation mode of the automobile air conditioner;
step S303, acquiring a corresponding table of engine water temperature and exhaust power of the current operation mode, wherein in the corresponding table of the engine water temperature and the exhaust power, the exhaust power corresponding to the engine water temperature with high temperature is less than or equal to the exhaust power corresponding to the engine water temperature with low temperature;
step S304, determining exhaust power corresponding to the current water temperature of the engine as exhaust power to be adjusted according to the engine water temperature and exhaust power correspondence table;
step S305, adjusting the exhaust power of an electronic exhaust valve which discharges exhaust gas to an exhaust gas heat exchanger to be the exhaust power to be adjusted, wherein an exhaust pipe of the engine is communicated with an air inlet end of the exhaust gas heat exchanger, and a cooling liquid channel of the engine, a liquid channel of the exhaust gas heat exchanger and a heating device for adjusting the temperature of a passenger compartment of the automobile are connected in series to form a liquid channel loop;
step S306, detecting the rotating speed of the engine;
step S307, adjusting the water pump power of the electronic water pump for driving the liquid in the liquid channel loop to flow according to the rotating speed of the engine;
step S308, if the engine is closed, controlling an electronic exhaust valve which discharges the exhaust gas to the exhaust gas heat exchanger to be kept open for a preset exhaust valve operation time period and then to be closed; and/or
Step S309, if the engine is closed, detecting the current running mode of the automobile air conditioner;
and S310, if the current operation mode is the air conditioner closing mode, controlling the electronic water pump driving the liquid flow of the liquid channel loop to operate according to the water pump power of the air conditioner closing mode for a preset water pump operation time period and then close, otherwise, controlling the electronic water pump driving the liquid flow of the liquid channel loop to operate according to the water pump power of the current operation mode.
Specifically, in steps S301 to S305, the exhaust power for discharging the exhaust gas to the exhaust gas heat exchanger is adjusted in accordance with the engine water temperature. In step S303, an engine water temperature and exhaust power correspondence table is determined according to the current operation mode of the vehicle air conditioner. The operation modes of the automobile air conditioner include but are not limited to: a greenhouse mode, a defrosting mode and a closing mode. Under different operation modes, different engine water temperature and exhaust power corresponding tables are provided. For example, table 1-1 is a table of correspondence between engine water temperature and exhaust power for the warm-room mode, table 2-1 is a table of correspondence between engine water temperature and exhaust power for the defrost mode, and table 3-1 is a table of correspondence between engine water temperature and exhaust power for the off mode.
TABLE 1-1 Engine Water temperature and exhaust Power correspondence Table for Warm Room mode
TABLE 2-1 Engine Water temperature and exhaust Power correspondence Table for defrost mode
TABLE 3-1 Engine Water temperature versus exhaust Power correspondence for off mode
The engine water temperature may be obtained by a water temperature sensor 6 provided in a fluid passage of the engine 1, for example, as shown in fig. 2. The exhaust power corresponding to the engine water temperature having a high temperature is equal to or less than the exhaust power corresponding to the engine water temperature having a low temperature, and in the above table, T10< T20< T30, K10> K20> K30> K40, T11< T21< T31, K11> K21> K31> K41, and T12< T22< T32, K12> K22> K32> K42.
The exhaust power in the above table can be represented by an exhaust power ratio, that is, the exhaust power is the exhaust power ratio multiplied by the full open exhaust power. When the exhaust power is expressed as the exhaust power ratio, preferably, K10= K11= K12=100%, and K40= K41= K42=0%.
And then step S304 is to determine the exhaust power corresponding to the current water temperature of the engine as the exhaust power to be adjusted according to the engine water temperature and exhaust power correspondence table. Namely, the corresponding exhaust power is determined according to the temperature section of the current water temperature of the engine. Finally, in step S305, an operation command, for example, a duty command is output to the electronic exhaust valve, and the exhaust power of the electronic exhaust valve is controlled to the exhaust power to be adjusted, so that the exhaust power of the exhaust gas discharged to the exhaust gas heat exchanger 2 is adjusted, and the valve opening of the electronic exhaust valve 4, that is, the amount of the exhaust gas discharged to the exhaust gas heat exchanger 2 is controlled.
And step S306 to step S307, adjusting the water pump power of the electronic water pump for driving the liquid of the liquid channel loop to flow according to the engine speed. The rotation speed of the engine influences the degree of waste heat recovery, so that the power of a water pump of the electronic water pump is adjusted according to the rotation speed of the generator, the flow of liquid in the liquid channel loop is adjusted, and optimal recovery control is achieved.
In one embodiment, the adjusting of the power of the water pump of the electronic water pump for driving the liquid flow of the liquid passage circuit according to the engine speed specifically includes:
detecting the current running mode of the automobile air conditioner and the current water temperature of an engine;
acquiring an engine rotating speed and water pump power corresponding table related to the current operation mode and the current water temperature of the engine, wherein in the engine rotating speed and water pump power corresponding table, the water pump power corresponding to the engine rotating speed with high rotating speed is less than or equal to the water pump power corresponding to the engine rotating speed with low rotating speed;
determining the water pump power corresponding to the current rotating speed of the engine as the water pump power to be regulated according to the engine rotating speed and water pump power correspondence table;
and adjusting the power of a water pump of an electronic water pump for driving the liquid of the liquid channel loop to be the power of the water pump to be adjusted.
Specifically, according to the current operation mode of the automobile air conditioner and the current water temperature of the engine, a corresponding engine rotating speed and water pump power correspondence table is selected, then the water pump power corresponding to the current rotating speed of the engine is determined, and finally the water pump power of the electronic water pump 5 in fig. 2 is adjusted.
In one embodiment, the obtaining a correspondence table between engine speed and water pump power related to the current operation mode and the current water temperature of the engine, where in the correspondence table between engine speed and water pump power, water pump power corresponding to an engine speed with a high speed is less than or equal to water pump power corresponding to an engine speed with a low speed specifically includes:
determining a temperature threshold according to the operating mode;
if the current water temperature of the engine is larger than the temperature threshold value, selecting an engine rotating speed and water pump power corresponding table in a high temperature state, otherwise selecting an engine rotating speed and water pump power corresponding table in a low temperature state, wherein in the engine rotating speed and water pump power corresponding table, the water pump power corresponding to the engine rotating speed with high rotating speed is smaller than or equal to the water pump power corresponding to the engine rotating speed with low rotating speed, and for the same engine rotating speed, the water pump power corresponding to the engine rotating speed and water pump power corresponding table in the high temperature state is smaller than or equal to the water pump power corresponding to the engine rotating speed and water pump power corresponding table in the low temperature state.
Specifically, the operation modes of the air conditioner of the automobile include, but are not limited to: a greenhouse mode, a defrosting mode and a closing mode. In different operation modes, corresponding temperature thresholds are set, for example, in a greenhouse mode, a first temperature threshold T1 is set, a second temperature threshold T2 is set at a defrosting temperature, and a third temperature threshold T3 is set in a closing mode. And determining that the current water temperature of the engine is high temperature or low temperature through the temperature threshold. Specifically, the current engine water temperature may be obtained by a water temperature sensor 6 provided in a fluid passage of the engine 1, as shown in fig. 2, for example.
The engine speed and water pump power corresponding table in the high temperature state and the engine speed and water pump power corresponding table in the low temperature state are different for different operation modes. As shown in tables 1-2, tables 1-3, tables 2-2, tables 2-3, tables 3-2, and tables 3-3.
TABLE 1-2 correspondence table of engine speed and water pump power in high-temperature state in greenhouse mode
TABLE 1-3 Engine speed and Water Pump Power correspondence Table at Low temperature in Room warming mode
TABLE 2-2 correspondence table of engine speed and water pump power in high-temperature state under defrosting mode
TABLE 2-3 correspondence table of engine speed and water pump power in low temperature state under defrosting mode
TABLE 3-2 correspondence table of engine speed and water pump power in high temperature state in shutdown mode
TABLE 3-3 correspondence table of engine speed and water pump power in low temperature state in shutdown mode
In the above table, R11< R12< R13, Q111> Q211> Q311> Q411, Q112> Q212> Q312> Q412, R21< R22< R23, Q121> Q221> Q321> Q421, Q122> Q222> Q322> Q422, R31< R32< R33, Q131> Q231> Q331> Q431, Q132> Q232> Q332> Q432, and the water pump power corresponding to the engine speed at the higher speed is equal to or lower than the water pump power corresponding to the engine speed at the lower speed.
Meanwhile, for the same engine speed, the water pump power corresponding to the engine speed and water pump power correspondence table in the high temperature state is less than or equal to the water pump power corresponding to the engine speed and water pump power correspondence table in the low temperature state, in the above table, Q111 is not less than Q112, Q211 is not less than Q212, Q311 is not less than Q312, Q411 is not less than Q412, Q121 is not less than Q122, Q221 is not less than Q222, Q321 is not less than Q322, Q421 is not less than Q422, Q131 is not less than Q132, Q231 is not less than Q232, Q331 is not less than Q332, and Q431 is not less than Q432.
Wherein the first thermometer threshold T1 may be set equal to T31, the second temperature threshold T2 equal to T32, and the third temperature threshold T3 equal to T33.
Meanwhile, R11= R21= R31= R1, R12= R22= R32= R2, and R13= R23= R33= R3 may be set. Likewise, Q111= Q121= Q11, Q211= Q221= Q21, Q311= Q321= Q31, Q411= Q421= Q41, Q112= Q122= Q132= Q12, Q212= Q222= Q232= Q22, Q312= Q322= Q332= Q32, Q412= Q422= Q432= Q42 may be set. Meanwhile, when the air conditioner is turned off and the water temperature of the engine is high, the electronic water pump can be turned off, so that energy is saved. Therefore, Q131= Q231= Q331= Q431=0 can be set.
The water pump power in the table may be represented by a water pump power ratio, that is, the water pump power is the water pump power ratio multiplied by the full-open water pump power. And controlling the water pump power of the electronic water pump by outputting a working instruction, such as a duty ratio instruction, to the electronic water pump.
And finally, when the engine is closed, triggering step S308, controlling the electronic exhaust valve to be opened for a period of time and then closed, and/or executing steps S309 to S310, and controlling the electronic water pump to correspondingly operate according to the current operation mode of the automobile air conditioner.
According to the embodiment, the exhaust power of the exhaust gas discharged to the exhaust gas heat exchanger is adjusted according to the temperature of the engine water, so that the accurate control of heat recovery is realized, and the damage risk caused by heat accumulation is avoided. Meanwhile, different flow control is set by combining the degree of waste heat recovery, and the optimal recovery control is realized. And waste heat recovery is carried out by combining the functional requirements of different operation modes of the air conditioner, so that the optimal heat utilization is realized. Finally, by setting the exhaust heat recovery control after the engine is stopped, the heat is recovered to the maximum extent, and the heat accumulation inside the EHRS can be reduced.
Fig. 4 is a flowchart illustrating the operation of the method for controlling the waste heat recovery of the vehicle when the engine is running according to the preferred embodiment of the present invention, and the method controls the waste heat recovery system illustrated in fig. 2, wherein the waste heat recovery system comprises: engine 1, exhaust gas heat exchanger 2, be used for adjusting warm braw device 3, electron discharge valve 4 and the control electronics of car passenger cabin temperature, the coolant liquid way of engine 1 the liquid way of exhaust gas heat exchanger 2 and the warm braw liquid way that warm braw device 3 belonged to establishes ties and forms the liquid way return circuit, control electronics with electron discharge valve 4 communication connection, electron discharge valve 4 one end and engine 1's blast pipe intercommunication, the other end with exhaust gas heat exchanger 2's air flue intercommunication, engine 1 passes through water pump 9 simultaneously and the communication of macrocycle temperature saver 8 and radiator 7, forms the macrocycle.
The control method comprises the following steps:
step S401, judging whether the engine runs, if so, executing step S402, otherwise, executing the engine closing process shown in FIG. 5;
step S402, if the current mode of the air conditioner is a warm air mode, step S403 is executed, otherwise step S407 is executed;
step S403, outputting an exhaust valve working instruction according to the table 1-1;
step S404, if the water temperature is larger than T1, executing step S405, otherwise executing step S406;
step S405, outputting an electronic water pump working instruction according to the table 1-2, and ending;
step S406, outputting an electronic water pump working instruction according to the table 1-3, and ending;
step S408, outputting an exhaust valve working instruction according to the table 2-1;
step S409, if the water temperature is greater than T2, executing step S410, otherwise executing step S411;
step S410, outputting an electronic water pump working instruction according to the table 2-2, and ending;
step S411, outputting an electronic water pump working instruction according to the table 2-3, and ending;
step S412, if the current mode of the air conditioner is the closing mode, step S413 is executed, otherwise, the operation is finished;
step S413, outputting an exhaust valve working instruction according to the table 3-1;
step S414, if the water temperature is more than T3, executing step S415, otherwise executing step S416;
step S415, outputting the working instruction of the electronic water pump according to the table 3-2, and ending;
and S416, outputting the working instruction of the electronic water pump according to the table 3-3, and ending.
Fig. 5 is a flowchart illustrating the operation of the waste heat recovery control method for an automobile when the engine is turned off according to the preferred embodiment of the present invention, which includes:
step S501, if the current mode of the air conditioner is a warm air mode, step S502 is executed, otherwise step S504 is executed;
step S502, the electronic exhaust valve is closed after being kept open for t seconds;
step S503, the electronic water pump works according to the power ratio of the water pump in the fully-open greenhouse mode, and the operation is finished;
step S504, if the current mode of the air conditioner is the defrosting mode, step S505 is executed, otherwise step S507 is executed;
step S505, the electronic exhaust valve is closed after being kept opened for t seconds;
step S506, the electronic water pump works according to the power ratio of the water pump in the fully-open defrosting mode, and the operation is finished;
step S507, if the current mode of the air conditioner is the closing mode, step S508 is executed, otherwise, the operation is finished;
step S508, the electronic exhaust valve is closed after being kept open for t seconds;
and step S509, the electronic water pump is shut down after working for t seconds according to the fully-open shut-down mode water pump power ratio, and the process is finished.
Wherein, greenhouse mode water pump power ratio can be equal with defrosting mode water pump power ratio, and off-mode water pump power ratio is less than greenhouse mode water pump power ratio.
EXAMPLE III
Fig. 6 is a schematic diagram of a hardware structure of an electronic device for controlling automobile waste heat recovery according to the present invention, which includes:
at least one processor 601; and (c) a second step of,
a memory 602 communicatively coupled to at least one of the processors 601; wherein,
the memory 602 stores instructions executable by at least one of the processors 601 to cause at least one of the processors 601 to:
detecting the running state of an automobile engine, and if the engine runs, detecting the water temperature of the engine;
adjusting exhaust power of exhaust gas discharged to an exhaust gas heat exchanger according to the temperature of water in the engine, wherein an exhaust pipe of the engine is communicated with an air inlet end of the exhaust gas heat exchanger, and a cooling liquid channel of the engine, a liquid channel of the exhaust gas heat exchanger and a heating device for adjusting the temperature of a passenger compartment of a vehicle are connected in series to form a liquid channel loop
The Electronic device is preferably an automotive Electronic Control Unit (ECU). One processor 601 is illustrated in fig. 6.
The electronic device may further include: an input device 603 and a display device 604.
The processor 601, the memory 602, the input device 603, and the display device 604 may be connected by a bus or other means, and are illustrated as being connected by a bus.
The memory 602, serving as a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules corresponding to the automobile waste heat recovery control method in the embodiment of the present application, for example, the method flow shown in fig. 1. The processor 601 executes various functional applications and data processing by running nonvolatile software programs, instructions, and modules stored in the memory 602, that is, implements the automobile exhaust heat recovery control method in the above-described embodiment.
The memory 602 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the automobile exhaust heat recovery control method, and the like. Further, the memory 602 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, the memory 602 may optionally include memory remotely located from the processor 601, and these remote memories may be connected over a network to a device that performs the automotive waste heat recovery control method. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 603 may receive an input of a user click and generate signal inputs related to user settings and function control of the automobile waste heat recovery control method. The display device 604 may include a display screen or the like.
The automobile exhaust heat recovery control method in any of the above-described method embodiments is performed when the one or more modules are stored in the memory 602 and executed by the one or more processors 601.
According to the invention, the exhaust power of the exhaust gas discharged to the exhaust gas heat exchanger is regulated according to the water temperature of the engine, so that the accurate control of heat recovery is realized, and the damage risk caused by heat accumulation is avoided.
Example four
A fourth embodiment of the present invention is an automobile exhaust heat recovery control electronic device, including:
at least one processor;
a memory communicatively coupled to at least one of the processors; wherein,
the memory stores instructions executable by at least one of the processors to enable the at least one of the processors to:
and detecting the running state of the automobile engine, and if the engine runs, detecting the water temperature of the engine.
The current operation mode of the automobile air conditioner is detected.
Acquiring an engine water temperature and exhaust power corresponding table related to the current operation mode, wherein in the engine water temperature and exhaust power corresponding table, the exhaust power corresponding to the engine water temperature with high temperature is less than or equal to the exhaust power corresponding to the engine water temperature with low temperature;
determining exhaust power corresponding to the current water temperature of the engine as exhaust power to be adjusted according to the engine water temperature and exhaust power correspondence table;
adjusting the exhaust power of an electronic exhaust valve discharging exhaust gas to an exhaust gas heat exchanger to be adjusted, wherein an exhaust pipe of the engine is communicated with an air inlet end of the exhaust gas heat exchanger, and a cooling liquid channel of the engine, a liquid channel of the exhaust gas heat exchanger and a heating device for adjusting the temperature of a passenger compartment of the automobile are connected in series to form a liquid channel loop;
detecting the rotating speed of the engine;
adjusting the water pump power of an electronic water pump for driving liquid of the liquid passage loop to flow according to the rotating speed of the engine;
if the engine is closed, controlling an electronic exhaust valve for discharging the exhaust gas to the exhaust gas heat exchanger to be closed after the electronic exhaust valve is kept open for a preset exhaust valve operation time period; and/or
If the engine is closed, detecting the current running mode of the automobile air conditioner;
and if the current operation mode is that the air conditioner is closed, controlling the electronic water pump driving the liquid in the liquid channel loop to flow to operate according to the water pump power of the air conditioner closing mode for a preset water pump operation time period and then closing, otherwise, controlling the electronic water pump driving the liquid in the liquid channel loop to flow to operate according to the water pump power of the current operation mode.
In one embodiment, the adjusting of the water pump power of the electronic water pump for driving the liquid in the liquid passage loop to flow according to the engine speed specifically includes:
detecting the current running mode of an automobile air conditioner and the current water temperature of an engine;
acquiring an engine rotating speed and water pump power corresponding table related to the current operation mode and the current water temperature of the engine, wherein in the engine rotating speed and water pump power corresponding table, the water pump power corresponding to the engine rotating speed with high rotating speed is less than or equal to the water pump power corresponding to the engine rotating speed with low rotating speed;
determining the water pump power corresponding to the current rotating speed of the engine as the water pump power to be regulated according to the engine rotating speed and water pump power correspondence table;
and adjusting the power of a water pump of the electronic water pump for driving the liquid in the liquid channel loop to flow as the power of the water pump to be adjusted.
In one embodiment, the obtaining a correspondence table between engine speed and water pump power for the current operation mode and the current water temperature of the engine, where in the correspondence table between engine speed and water pump power, water pump power corresponding to an engine speed with a high speed is less than or equal to water pump power corresponding to an engine speed with a low speed specifically includes:
determining a temperature threshold according to the operation mode;
if the current water temperature of the engine is larger than the temperature threshold value, selecting an engine rotating speed and water pump power corresponding table in a high temperature state, otherwise selecting an engine rotating speed and water pump power corresponding table in a low temperature state, wherein in the engine rotating speed and water pump power corresponding table, the water pump power corresponding to the engine rotating speed with high rotating speed is smaller than or equal to the water pump power corresponding to the engine rotating speed with low rotating speed, and for the same engine rotating speed, the water pump power corresponding to the engine rotating speed and water pump power corresponding table in the high temperature state is smaller than or equal to the water pump power corresponding to the engine rotating speed and water pump power corresponding table in the low temperature state.
According to the embodiment, the exhaust power of the exhaust gas discharged to the exhaust gas heat exchanger is adjusted according to the temperature of the engine water, so that the accurate control of heat recovery is realized, and the damage risk caused by heat accumulation is avoided. Meanwhile, different flow control is set by combining the degree of waste heat recovery, and the optimal recovery control is realized. And waste heat recovery is carried out by combining the functional requirements of different operation modes of the air conditioner, so that the optimal heat utilization is realized. Finally, by setting the exhaust heat recovery control after the engine is stopped, the heat is recovered to the maximum extent, and the heat accumulation inside the EHRS can be reduced.
Fig. 2 is a schematic diagram of an automobile waste heat recovery system according to the present invention, which includes: engine 1, exhaust gas heat exchanger 2, be used for adjusting warm braw device 3, electron discharge valve 4 of car passenger cabin temperature and as before control electronics, the coolant liquid way of engine 1 the liquid way of exhaust gas heat exchanger 2 and the warm braw liquid way that warm braw device 3 belongs to establishes ties and forms the liquid way return circuit, control electronics with electron discharge valve 4 communication connection, electron discharge valve 4 one end and the blast pipe intercommunication of engine 1, the other end with exhaust gas heat exchanger 2's air flue intercommunication.
The control electronics executes a work flow as shown in fig. 1 or fig. 3, adjusting the exhaust power of the exhaust gas to the exhaust gas heat exchanger 2, i.e. adjusting the exhaust power of the electronic exhaust valve 4, depending on the engine water temperature. Specifically, the exhaust power for discharging the exhaust gas to the exhaust gas heat exchanger 2 can be adjusted by adjusting the duty ratio output to the electronic exhaust valve 4, thereby controlling the valve opening of the electronic exhaust valve 4, that is, controlling the amount of the exhaust gas discharged to the exhaust gas heat exchanger 2.
The exhaust gas heat exchanger 2 comprises an air passage and a liquid passage, wherein the air passage receives the exhaust gas, and the heat is exchanged in the exhaust gas heat exchanger 2 due to the heat carried in the exhaust gas, and the heat is transferred to the liquid, such as water, in the liquid passage of the exhaust gas heat exchanger 2. Since the exhaust gas heat exchanger 2 is connected in series to a liquid path circuit formed by the coolant liquid path of the engine 1 and the warm air liquid path in which the warm air device 3 is located, the liquid in the liquid path of the exhaust gas heat exchanger 2 transfers heat to the liquid path circuit and is used by the warm air device 3. The heater 3 may be an air conditioning heater core to heat the passenger compartment. Meanwhile, the engine 1 is communicated with a large-circulation thermostat 8 and a radiator 7 through a water pump 9 to form a large circulation.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. An automobile exhaust heat recovery control method, characterized by comprising:
detecting the running state of an automobile engine, and if the engine runs, detecting the water temperature of the engine;
adjusting exhaust power of exhaust gas discharged to an exhaust gas heat exchanger according to the temperature of water in an engine, wherein an exhaust pipe of the engine is communicated with an air inlet end of the exhaust gas heat exchanger, and a cooling liquid channel of the engine, a liquid channel of the exhaust gas heat exchanger and a heating device for adjusting the temperature of a passenger compartment of a vehicle are connected in series to form a liquid channel loop;
the adjusting of the exhaust power of the exhaust gas discharged to the exhaust gas heat exchanger according to the temperature of the engine water specifically includes:
detecting a current operation mode of the automobile air conditioner;
obtaining an engine water temperature and exhaust power corresponding table related to the current operation mode, wherein the engine water temperature and exhaust power corresponding table represents the corresponding relation between the engine water temperature and the exhaust power, and in the engine water temperature and exhaust power corresponding table, the exhaust power corresponding to the engine water temperature with high temperature is less than or equal to the exhaust power corresponding to the engine water temperature with low temperature;
according to the engine water temperature and exhaust power correspondence table, determining exhaust power corresponding to the current engine water temperature as exhaust power to be adjusted;
adjusting the exhaust power of an electronic exhaust valve discharging the exhaust gas to the exhaust gas heat exchanger to be the exhaust power to be adjusted;
the engine water temperature and exhaust power correspondence table includes: an engine water temperature and exhaust power correspondence table for the greenhouse mode, an engine water temperature and exhaust power correspondence table for the defrost mode, and an engine water temperature and exhaust power correspondence table for the off mode;
the engine water temperature and exhaust power correspondence table for the greenhouse mode is as follows:
the engine water temperature and exhaust power correspondence table for the defrosting mode is as follows:
wherein, the T12, the T22 and the T32 are engine water temperatures, and the K12, the K22, the K32 and the K42 are exhaust power;
the engine water temperature and exhaust power map for the off mode is as follows:
wherein, T10, T20 and T30 are engine water temperatures, and K10, K20, K30 and K40 are exhaust power.
2. The automobile waste heat recovery control method according to claim 1, characterized by further comprising:
detecting the engine speed if the engine is running;
and adjusting the power of a water pump of an electronic water pump for driving the liquid of the liquid passage loop to flow according to the rotating speed of the engine.
3. The automobile waste heat recovery control method according to claim 2, wherein the adjusting of the water pump power of the electronic water pump driving the liquid flow of the liquid passage circuit according to the engine speed specifically comprises:
detecting the current running mode of the automobile air conditioner and the current water temperature of an engine;
acquiring an engine rotating speed and water pump power corresponding table related to the current operation mode and the current water temperature of the engine, wherein in the engine rotating speed and water pump power corresponding table, the water pump power corresponding to the engine rotating speed with high rotating speed is less than or equal to the water pump power corresponding to the engine rotating speed with low rotating speed;
determining the water pump power corresponding to the current rotating speed of the engine as the water pump power to be regulated according to the engine rotating speed and water pump power correspondence table;
adjusting the water pump power of an electronic water pump driving the liquid in the liquid channel loop to be the water pump power to be adjusted;
the engine speed and water pump power correspondence table comprises: the system comprises a correspondence table of engine rotating speed and water pump power in a high-temperature state under a greenhouse mode, a correspondence table of engine rotating speed and water pump power in a low-temperature state under the greenhouse mode, a correspondence table of engine rotating speed and water pump power under the high-temperature state under a defrosting mode, a correspondence table of engine rotating speed and water pump power under the low-temperature state under the defrosting mode, a correspondence table of engine rotating speed and water pump power under the high-temperature state under a closing mode, and a correspondence table of engine rotating speed and water pump power under the low-temperature state under the closing mode;
the engine speed and water pump power correspondence table in the high-temperature state in the greenhouse mode is as follows:
wherein T1 is a first temperature threshold, R11, R12 and R13 are engine rotating speeds, and Q111, Q211, Q311 and Q411 are water pump power;
the engine speed and water pump power correspondence table in the low-temperature state in the greenhouse mode is as follows:
wherein T1 is a first temperature threshold, R11, R12 and R13 are engine speeds, and Q112, Q212, Q312 and Q412 are water pump powers;
the corresponding table of the engine speed and the water pump power in the high-temperature state in the defrosting mode is as follows:
wherein T2 is a second temperature threshold, R21, R22 and R23 are engine speeds, and Q121, Q221, Q321 and Q421 are water pump powers;
the corresponding table of the engine speed and the water pump power in the low-temperature state in the defrosting mode is as follows:
wherein T2 is a second temperature threshold, R21, R22 and R23 are engine speeds, and Q122, Q222, Q322 and Q422 are water pump powers;
the corresponding table of the engine speed and the water pump power in the high-temperature state in the closed mode is as follows:
wherein T3 is a third temperature threshold, R31, R32 and R33 are engine rotation speeds, and Q131, Q231, Q331 and Q431 are water pump powers;
the engine speed and water pump power correspondence table in the low-temperature state in the closed mode is as follows:
wherein, T3 is a third temperature threshold, R31, R32 and R33 are engine speeds, and Q132, Q232, Q332 and Q432 are water pump powers.
4. The automobile waste heat recovery control method according to claim 3, wherein the obtaining of the engine speed and water pump power correspondence table regarding the current operation mode and regarding the current water temperature of the engine, and in the engine speed and water pump power correspondence table, the water pump power corresponding to the engine speed with the higher speed is less than or equal to the water pump power corresponding to the engine speed with the lower speed specifically includes:
determining a temperature threshold according to the operation mode;
if the current water temperature of the engine is larger than the temperature threshold value, selecting an engine rotating speed and water pump power corresponding table in a high temperature state, otherwise selecting an engine rotating speed and water pump power corresponding table in a low temperature state, wherein in the engine rotating speed and water pump power corresponding table, the water pump power corresponding to the engine rotating speed with high rotating speed is smaller than or equal to the water pump power corresponding to the engine rotating speed with low rotating speed, and for the same engine rotating speed, the water pump power corresponding to the engine rotating speed and water pump power corresponding table in the high temperature state is smaller than or equal to the water pump power corresponding to the engine rotating speed and water pump power corresponding table in the low temperature state.
5. The automobile exhaust heat recovery control method according to claim 1, characterized by further comprising:
if the engine is closed, controlling an electronic exhaust valve which discharges the exhaust gas to the exhaust gas heat exchanger to be kept open for a preset exhaust valve operation time period and then be closed; and/or
If the engine is closed, detecting the current running mode of the automobile air conditioner;
and if the current operation mode is that the air conditioner is closed, controlling the electronic water pump driving the liquid in the liquid channel loop to flow to operate according to the water pump power of the air conditioner closing mode for a preset water pump operation time period and then closing, otherwise, controlling the electronic water pump driving the liquid in the liquid channel loop to flow to operate according to the water pump power of the current operation mode.
6. An automotive exhaust heat recovery control electronic apparatus, characterized by comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to at least one of the processors; wherein,
the memory stores instructions executable by at least one of the processors to enable the at least one of the processors to:
detecting the running state of an automobile engine, and if the engine runs, detecting the water temperature of the engine;
adjusting exhaust power of exhaust gas discharged to an exhaust gas heat exchanger according to the temperature of water in an engine, wherein an exhaust pipe of the engine is communicated with an air inlet end of the exhaust gas heat exchanger, and a cooling liquid channel of the engine, a liquid channel of the exhaust gas heat exchanger and a heating device for adjusting the temperature of a passenger compartment of a vehicle are connected in series to form a liquid channel loop;
the adjusting of the exhaust power of the exhaust gas discharged to the exhaust gas heat exchanger according to the temperature of the engine water specifically includes:
detecting a current operation mode of the automobile air conditioner;
obtaining an engine water temperature and exhaust power corresponding table related to the current operation mode, wherein the engine water temperature and exhaust power corresponding table represents the corresponding relation between the engine water temperature and the exhaust power, and in the engine water temperature and exhaust power corresponding table, the exhaust power corresponding to the engine water temperature with high temperature is less than or equal to the exhaust power corresponding to the engine water temperature with low temperature;
determining exhaust power corresponding to the current water temperature of the engine as exhaust power to be adjusted according to the engine water temperature and exhaust power correspondence table;
adjusting the exhaust power of an electronic exhaust valve discharging the exhaust gas to the exhaust gas heat exchanger to be the exhaust power to be adjusted;
the engine water temperature and exhaust power correspondence table includes: an engine water temperature and exhaust power correspondence table for the greenhouse mode, an engine water temperature and exhaust power correspondence table for the defrost mode, and an engine water temperature and exhaust power correspondence table for the off mode;
the engine water temperature and exhaust power correspondence table for the greenhouse mode is as follows:
wherein, the T11, the T21 and the T31 are engine water temperatures, and the K11, the K21, the K31 and the K41 are exhaust power;
the engine water temperature and exhaust power correspondence table for the defrosting mode is as follows:
wherein, the T12, the T22 and the T32 are engine water temperatures, and the K12, the K22, the K32 and the K42 are exhaust power;
the engine water temperature and exhaust power map for the off mode is as follows:
wherein, T10, T20 and T30 are engine water temperatures, and K10, K20, K30 and K40 are exhaust power.
7. The automotive exhaust heat recovery control electronic device according to claim 6, characterized by further comprising:
detecting the engine speed if the engine is running;
and adjusting the power of a water pump of the electronic water pump for driving the liquid in the liquid channel loop to flow according to the rotating speed of the engine.
8. The automotive exhaust heat recovery control electronic device according to claim 7, wherein the adjusting of the power of the water pump of the electronic water pump that drives the flow of the liquid in the liquid passage circuit according to the engine speed specifically includes:
detecting the current running mode of the automobile air conditioner and the current water temperature of an engine;
acquiring an engine rotating speed and water pump power corresponding table related to the current operation mode and the current water temperature of the engine, wherein in the engine rotating speed and water pump power corresponding table, the water pump power corresponding to the engine rotating speed with high rotating speed is less than or equal to the water pump power corresponding to the engine rotating speed with low rotating speed;
determining the water pump power corresponding to the current rotating speed of the engine as the water pump power to be regulated according to the engine rotating speed and water pump power correspondence table;
adjusting the water pump power of an electronic water pump driving the liquid in the liquid channel loop to be the water pump power to be adjusted;
the engine speed and water pump power correspondence table comprises: the method comprises the following steps of (1) enabling a corresponding table of engine rotating speed and water pump power under a high-temperature state under a greenhouse mode, a corresponding table of engine rotating speed and water pump power under a low-temperature state under the greenhouse mode, a corresponding table of engine rotating speed and water pump power under a high-temperature state under a defrosting mode, a corresponding table of engine rotating speed and water pump power under the high-temperature state under a closing mode and a corresponding table of engine rotating speed and water pump power under the low-temperature state under the closing mode to be in a heating mode;
the engine speed and water pump power correspondence table in the high temperature state in the greenhouse mode is as follows:
wherein T1 is a first temperature threshold, R11, R12 and R13 are engine rotating speeds, and Q111, Q211, Q311 and Q411 are water pump power;
the engine speed and water pump power correspondence table in the low-temperature state in the greenhouse mode is as follows:
wherein T1 is a first temperature threshold, R11, R12 and R13 are engine speeds, and Q112, Q212, Q312 and Q412 are water pump powers;
the corresponding table of the engine speed and the water pump power in the high-temperature state in the defrosting mode is as follows:
wherein T2 is a second temperature threshold, R21, R22 and R23 are engine speeds, and Q121, Q221, Q321 and Q421 are water pump powers;
the corresponding table of the engine speed and the water pump power in the low-temperature state in the defrosting mode is as follows:
wherein T2 is a second temperature threshold, R21, R22 and R23 are engine speeds, and Q122, Q222, Q322 and Q422 are water pump powers;
the corresponding table of the engine speed and the water pump power in the high-temperature state in the closing mode is as follows:
wherein, T3 is a third temperature threshold, R31, R32 and R33 are engine rotation speeds, and Q131, Q231, Q331 and Q431 are water pump powers;
the corresponding table of the engine speed and the water pump power in the low-temperature state in the closing mode is as follows:
wherein, T3 is a third temperature threshold, R31, R32 and R33 are engine speeds, and Q132, Q232, Q332 and Q432 are water pump powers.
9. The electronic device for controlling waste heat recovery of an automobile according to claim 8, wherein the obtaining of the correspondence table between engine speed and water pump power for the current operation mode and the current water temperature of the engine, and in the correspondence table between engine speed and water pump power, the water pump power corresponding to the engine speed with the higher speed is less than or equal to the water pump power corresponding to the engine speed with the lower speed specifically includes:
determining a temperature threshold according to the operating mode;
if the current water temperature of the engine is larger than the temperature threshold value, selecting a corresponding table of the engine rotating speed and the water pump power in a high temperature state, otherwise selecting a corresponding table of the engine rotating speed and the water pump power in a low temperature state, wherein in the corresponding table of the engine rotating speed and the water pump power, the water pump power corresponding to the engine rotating speed with high rotating speed is smaller than or equal to the water pump power corresponding to the engine rotating speed with low rotating speed, and for the same engine rotating speed, the water pump power corresponding to the corresponding table of the engine rotating speed and the water pump power in the high temperature state is smaller than or equal to the water pump power corresponding to the corresponding table of the engine rotating speed and the water pump power in the low temperature state.
10. The automotive exhaust heat recovery control electronic device according to claim 6, characterized by further comprising:
if the engine is closed, controlling an electronic exhaust valve which discharges the exhaust gas to the exhaust gas heat exchanger to be kept open for a preset exhaust valve operation time period and then be closed; and/or
If the engine is closed, detecting the current running mode of the automobile air conditioner;
and if the current operation mode is the air conditioner closing mode, controlling the electronic water pump driving the liquid in the liquid channel loop to flow to run according to the water pump power of the air conditioner closing mode for a preset water pump operation time period and then closing the electronic water pump, otherwise, controlling the electronic water pump driving the liquid in the liquid channel loop to flow to run according to the water pump power of the current operation mode.
11. An automobile waste heat recovery system, comprising: the control system comprises an engine, an exhaust gas heat exchanger, a warm air device for adjusting the temperature of a passenger compartment of an automobile, an electronic exhaust valve and control electronic equipment according to any one of claims 6 to 10, wherein a cooling liquid channel of the engine, a liquid channel of the exhaust gas heat exchanger and a warm air liquid channel where the warm air device is located are connected in series to form a liquid channel loop, the control electronic equipment is in communication connection with the electronic exhaust valve, one end of the electronic exhaust valve is communicated with an exhaust pipe of the engine, and the other end of the electronic exhaust valve is communicated with the air channel of the exhaust gas heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| JP4976222B2 (en) * | 2007-07-23 | 2012-07-18 | カルソニックカンセイ株式会社 | Waste heat recovery device |
| KR20120136944A (en) * | 2011-06-10 | 2012-12-20 | 현대자동차주식회사 | Auto transmission heat managing system |
| CN207348940U (en) * | 2017-09-20 | 2018-05-11 | 东风汽车公司 | A kind of automobile exhaust waste heat recycling system |
| CN110356187B (en) * | 2018-03-26 | 2022-12-20 | 长城汽车股份有限公司 | Air conditioning and heating system and control method thereof |
| CN110154691B (en) * | 2019-05-27 | 2020-08-04 | 安徽江淮汽车集团股份有限公司 | Automobile heat management system and method |
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