CN108263202B - Engine cooling device with multiple range extenders - Google Patents
Engine cooling device with multiple range extenders Download PDFInfo
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- CN108263202B CN108263202B CN201711341651.7A CN201711341651A CN108263202B CN 108263202 B CN108263202 B CN 108263202B CN 201711341651 A CN201711341651 A CN 201711341651A CN 108263202 B CN108263202 B CN 108263202B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
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Abstract
The invention discloses a multi-range extender engine cooling device, and relates to the field of new energy. The multi-range extender engine cooling device comprises a radiator, an electronic fan, an expansion tank, a cockpit heater, an electronic water pump, a one-way valve and a pipeline, and the working mode can be controlled by a controller. The cooling circuit is independently configured, namely, each range extender engine is respectively provided with a set of radiator, an electronic fan, an expansion tank and a cockpit heater, and efficient cooling can be realized according to different requirements of the two range extender engines. The multi-range extender engine can realize that one range extender engine works alone or a plurality of range extender engines work together, and simultaneously, when the plurality of range extender engines work together, high-temperature cooling liquid of the range extender engine which is started first is introduced into the range extender engine which is started later, so that the preheating time of the engine is shortened, and the energy is saved.
Description
Technical Field
The invention relates to the field of new energy, in particular to a cooling device of a multi-range extender engine.
Background
At the present that the energy problem becomes urgent day by day, along with the higher and higher requirements of energy conservation and emission reduction of the whole vehicle, the development of new energy vehicles is more and more urgent, and the development of electric vehicles is a good way. The electric automobile has no pollution, low noise and high energy efficiency. Especially, when the electric automobile runs in a city, the automobile stops when the automobile runs, the running speed is not high, and the electric automobile is more suitable.
However, at the present stage, the endurance mileage of the pure electric vehicle is limited, the service life of the battery is short, the energy storage capacity is small, and the driving mileage after one-time charging is unsatisfactory, so that the development of the extended-range electric vehicle is imperative. In the process of operating the range extender engine, the advanced cooling device is an important part of the energy-saving and emission-reducing design of the range extender engine.
The existing single range extender engine has a large power coverage range, all working condition points are difficult to be in high-efficiency working areas, and correspondingly, the single range extender engine cannot ensure that all working condition points are in the high-efficiency working areas, so that a cooling device of the engine cannot achieve the optimal cooling effect because the engine is not in the high-efficiency working areas even if the heat dissipation requirement of the engine is met, and the running and the output power utilization of a vehicle are influenced.
Nowadays, the whole vehicle is more and more compact in arrangement, and the heavy truck and the large bus have greater requirements on power consumption, so that two or more range extenders are more preferably selected as energy supplies of power batteries in the selection of the range extenders of the heavy truck and the large bus. When the cooling liquid is cooled, a large amount of heat can be absorbed, the heat is not well utilized, and then the heat enters the cooling device for cooling, so that the heat is dissipated in the cooling process. Particularly, in the cooling of the multi-range extender, the cooling liquid needs to be heated twice or even for many times during preheating, so that the lost heat is more, and the requirements of energy conservation and emission reduction are not met.
Disclosure of Invention
The invention aims to provide a multi-range extender engine cooling device, which aims to meet the requirements of energy conservation and emission reduction and maximize the efficiency of the cooling device, so that the invention provides the multi-range extender engine cooling device with a preheating loop, and the specific scheme is as follows:
a multi-range extender engine cooling apparatus comprising: a first coolant circulation loop, a second coolant circulation loop, and a pre-heat loop.
The first coolant circulation circuit includes a first cooling circuit for cooling the first range extender engine and a first warm air circuit for providing warm air to the cabin.
The second cooling liquid circulation loop comprises a second cooling loop and a second warm air loop, the second cooling loop is used for cooling the second range extender engine, and the second warm air loop is used for providing warm air for the cockpit.
The preheating loop comprises a one-way valve and an electronic water pump, and the electronic water pump can pump high-temperature cooling liquid in the first cooling liquid circulation loop into the second cooling liquid circulation loop, so that the preheating time of the cooling liquid is shortened. The cooling loop comprises a thermostat, a radiator, an electronic fan and an expansion tank, and the warm air loop comprises the thermostat and a cockpit heater.
The cooling loop realizes high-efficiency cooling for the range extender engine, and the warm air loop provides warm air for the cockpit when the temperature of the cockpit is lower.
Furthermore, the first cooling liquid circulation loop provides high-temperature cooling liquid for the second cooling liquid circulation loop through the electronic water pump for preheating, the second cooling liquid circulation loop provides cooling liquid with mixed temperature for the first cooling liquid circulation loop through the one-way valve, a preheating loop is formed, and preheating time of the range extender engine started later is shortened.
The two range extender engines are connected through a pipeline, and the electronic water pump and the one-way valve which are shared in the pipeline control the flow direction of the cooling liquid, so that a preheating loop is formed between the two range extender engines.
The controller is further configured to activate one range extender engine or both range extender engines in response to a power demand of the vehicle to select an operating mode of the multi-range extender engine cooling apparatus.
Further, when the temperature of the coolant of the range extender started first rises to a set temperature, the controller starts the electronic water pump and opens the one-way valve, and the preheating loop is opened. When the temperature of the coolant of the engine of the range extender started later is increased to a set temperature, the controller closes the electronic water pump and the one-way valve, the preheating loop is closed, and the coolant circulation loop of each range extender works independently, so that the cooling efficiency is improved.
Further, when the warm air loop works, high-temperature cooling liquid in the range extender engine can enter the cockpit heater to heat cold air and provide warm air for the cockpit, and meanwhile, the high-temperature cooling liquid is cooled down and enters the range extender engine again.
Further, when the cooling circuit works, high-temperature cooling liquid enters the radiator through the thermostat, is cooled through the electronic fan and then returns to the range extender engine through the expansion tank, and the cooling circuit is completed.
Further, the coolant circulation circuit can be independently operated. When one range extender engine works alone, the cooling liquid circulation loop of the range extender engine works, and the cooling liquid circulation loop of the idle range extender engine does not work. When the two range extender engines work together, the cooling liquid circulation loops arranged on the two range extender engines work.
Furthermore, the number of the range extender engines is at least two, and the number of the cooling liquid circulation loops is consistent with that of the range extender engines. Specifically, the number of the range extender engines can be set to be two or more than two according to requirements, and meanwhile, each range extender engine is still provided with one set of independent cooling liquid circulation loop to achieve efficient cooling and provide warm air when the temperature of a cab is low.
When the whole vehicle is assembled, the multi-range extender engine cooling device can be flexibly arranged at different positions of the vehicle according to the arrangement requirement of the range extender engine, and the devices are connected through a pipeline.
The invention also provides a preheating method based on the multi-range extender engine cooling device, which comprises the following steps of,
the first range extender engine is started first.
The temperature of the coolant of the first range extender engine is detected and compared with a set temperature.
When the temperature reaches the set temperature, the output power is insufficient, and the second range extender engine needs to be started.
And starting the electronic water pump, simultaneously opening the one-way valve, pumping the high-temperature coolant in the first range extender engine into the second range extender engine by the electronic water pump to preheat the second range extender engine, and simultaneously enabling the coolant with the mixed temperature in the second range extender engine to flow into the first range extender engine through the one-way valve to form a preheating loop.
The coolant temperature of the second range extender engine is detected and compared with the set temperature.
When the set temperature is reached, the cooling efficiency needs to be guaranteed preferentially at the moment, the electronic water pump and the one-way valve are closed, the preheating loop is closed, and the first cooling liquid circulation loop and the second cooling liquid circulation loop work independently.
The invention has the following beneficial effects:
when the second range extender engine is started, high-temperature coolant in the range extender engine which is started first can be introduced into the range extender engine which is started later, and then coolant with the mixed temperature in the range extender engine which is started later is introduced into the range extender engine which is started first, so that a preheating loop is formed, the preheating time of the range extender engine which is started later is shortened, and the effects of energy conservation, emission reduction and consumption reduction are achieved.
The cooling devices of the engines of the multiple range extenders are independent, and each engine of the range extenders is provided with a cooling loop matched with the engine, so that the heat dissipation requirement of each engine of the range extenders can be met, and the engines can work in a high-efficiency working area.
When the multi-range extender engine works, one range extender engine can be started firstly, and the second range extender engine is started according to the required power requirement, so that the vehicle can flexibly adapt to different load requirements.
Compared with the single range extender engine cooling device with the same power, the multi-range extender engine cooling device is more flexible in arrangement and can be distributed at different positions of the vehicle.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a multiple range extender engine cooling arrangement according to an embodiment;
FIG. 2 is a schematic diagram of a cooling circuit of a multiple range extender engine cooling apparatus according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a warm air circuit of a multi-range extender engine cooling device according to the present embodiment;
FIG. 4 is a schematic diagram of a preheating circuit of the multiple range extender engine cooling device according to the present embodiment;
FIG. 5 is a flowchart illustrating a method for starting a warm-up circuit based on a multi-range-extender engine cooling device according to an embodiment of the present invention;
fig. 6 is a flowchart of a method for closing a warm-up circuit based on a multi-range-extender engine cooling device according to the present embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Embodiment 1, this embodiment provides a cooling device for a dual-range expander engine, and the specific scheme is as follows:
a dual-expander engine cooling apparatus comprising: a first coolant circulation loop, a second coolant circulation loop, and a pre-heat loop.
The first coolant circulation circuit includes a first cooling circuit for cooling the first range extender engine and a first warm air circuit for providing warm air to the cabin.
The second cooling liquid circulation loop comprises a second cooling loop and a second warm air loop, the second cooling loop is used for cooling the second range extender engine, and the second warm air loop is used for providing warm air for the cockpit.
The preheating loop comprises a one-way valve and an electronic water pump, and the electronic water pump can pump high-temperature cooling liquid in the first cooling liquid circulation loop into the second cooling liquid circulation loop, so that the preheating time of the cooling liquid is shortened.
The cooling loop comprises a thermostat, a radiator, an electronic fan and an expansion tank, and the warm air loop comprises the thermostat and a cockpit heater.
As shown, fig. 2 is a cooling circuit, fig. 3 is a warm air circuit, and fig. 4 is a preheating circuit.
The cooling loop realizes high-efficiency cooling for the range extender engine, and the warm air loop provides warm air for the cockpit when the temperature of the cockpit is lower.
Furthermore, the first cooling liquid circulation loop provides high-temperature cooling liquid for preheating to the second cooling liquid circulation loop through the electronic water pump, and the second cooling liquid circulation loop provides cooling liquid with mixed temperature for the first cooling liquid circulation loop through the one-way valve to form a preheating loop.
As shown in fig. 1, the thermostat, the radiator, the electronic fan, the expansion tank and the mechanical pump are connected in sequence to form an effective cooling loop, and a warm air loop consisting of the thermostat, the cockpit heater and the mechanical pump is also provided. When the driver feels that the temperature in the cockpit is low, the warm air loop can be started, and warm air is provided for the cockpit while the high-temperature cooling liquid is cooled. The two range extender engines are connected through a pipeline, an electronic water pump and a one-way valve are arranged in the pipeline, and the flow direction of cooling liquid is controlled, so that a preheating loop is formed between the two range extender engines.
When the whole vehicle is assembled, the double-range-extender engine cooling device can be flexibly arranged at different positions of the vehicle according to the arrangement requirement of the range extender engine, and the devices are connected through a pipeline.
Further, the dual range extender engine cooling device is provided with a controller for starting one range extender engine or starting two range extender engines according to the power requirement of the vehicle, and selecting the working mode of the dual range extender engine cooling device. When the water temperature of the engine of the range extender started firstly rises to a set temperature, the controller starts the engine of the other range extender, starts the electronic water pump and starts the one-way valve, and the preheating loop is opened. When the water temperature of the range extender engine started later is increased to a set temperature, the electronic water pump and the one-way valve are closed by the controller, the preheating loop is closed, and the cooling loop of each range extender engine works independently, so that the cooling efficiency is improved, and the range extender engine can work in a high-efficiency working area better.
Furthermore, the high-temperature cooling liquid in the range extender engine can enter a cockpit heater to heat cold air and provide warm air for the cockpit, and meanwhile, the high-temperature cooling liquid is cooled down and enters the range extender engine again.
Further, when the cooling circuit of the range extender engine works, high-temperature cooling liquid enters the radiator through the thermostat, is cooled through the electronic fan and then returns to the range extender engine through the expansion tank, and the cooling circuit is completed.
Further, the cooling circuit provided for each range extender engine operates independently. When one range extender engine works alone, the cooling circuit of the range extender engine configuration works, and the cooling circuit of the idle range extender engine configuration does not work. When the two range extender engines work together, the cooling circuits of the two range extender engines work. The dual range extender engine can charge the power battery through the two range extender engines, the requirement on the power coverage is small, and the independent cooling loops can meet the heat dissipation requirement of the range extender engine, so that the range extender engine can work in a high-efficiency working area, and the optimal cooling effect is achieved.
Specifically, high-temperature coolant in the range extender engine is shunted by the thermostat, and can pass through a radiator, a cockpit heater and an electronic water pump. When high-temperature cooling liquid passes through the radiator, the cooling loop starts to work, the electronic fan starts to operate according to a water temperature signal, cold air is sucked into the radiator, heat in the high-temperature cooling liquid is taken out, the purpose of cooling is achieved, the cooled cooling liquid flows through the expansion tank again and returns to the range extender engine through the mechanical pump, the heat dissipation requirement of the range extender engine is met, the range extender engine can work in a constant-temperature environment, and the optimal working state is kept.
When the cockpit needs to provide hot air, the high-temperature cooling liquid passes through the cockpit heater and is subjected to heat exchange with cold air, so that the hot air is blown into the cockpit, and the high-temperature cooling liquid can be cooled down and is used in an engine of the range extender. By utilizing the heat exchange principle, the cockpit can obtain warm air, and the cooling liquid can be cooled down.
When the vehicle needs to work with the dual range extender engines, the controller starts one of the range extender engines to charge the power battery, the cooling device of the range extender engine works, when the vehicle needs more power, namely the temperature of the coolant of the range extender engine which is started first is raised to a set temperature, the controller starts the other range extender engine, the electronic water pump is started, the one-way valve is opened, the high-temperature coolant is shunted by the thermostat and pumped into the range extender engine which is started later by the electronic water pump, and the coolant with mixed temperature in the range extender engine which is started later returns to the range extender engine which is started first through the one-way valve to form a preheating loop, so that the preheating time of the range extender engine which is started later is shortened.
Meanwhile, when the vehicle is in a load state and the required output power is further increased, and the temperature of the coolant of the range extender engine started later is also increased to a certain temperature, the controller closes the electronic water pump and the one-way valve, closes the preheating loop, enables the coolant circulation loop to work independently, and ensures the cooling efficiency of the cooling device. According to different working states of the two range extender engines, more efficient cooling is provided for each range extender engine.
The dual range extender engine cooling device can meet different requirements for the output power of the engine, is more suitable for two different carrying conditions, namely no-load carrying and full-load carrying, when a load exists, such as a heavy-duty truck, and has two different power requirements. The vehicle can output different powers according to the working condition, the load requirement of the vehicle is met, and the engine cooling device with the double range extenders can adapt to different power requirements to cool the engine, so that the engine can keep a good working state under different power requirements.
Embodiment 2, this embodiment proposes a multiple range extender engine cooling device, and the specific scheme is as follows:
a multi-range extender engine cooling apparatus comprising: the first cooling liquid circulation loop, the second cooling liquid circulation loop, the third cooling liquid circulation loop and the like, and the first preheating loop, the second preheating loop and the like.
The cooling liquid circulation loop comprises a cooling loop and a warm air loop, the cooling loop is used for cooling the corresponding range extender engine, and the warm air loop is used for providing warm air for the cockpit.
The preheating loop comprises a one-way valve and an electronic water pump, and the electronic water pump can pump high-temperature coolant in a coolant circulation loop of the range extender engine which is started firstly into a coolant circulation loop of the range extender engine which is started later, so that the preheating time of the coolant is shortened.
The cooling loop comprises a thermostat, a radiator, an electronic fan and an expansion tank, and the warm air loop comprises the thermostat and a cockpit heater.
The thermostat, the radiator, the electronic fan and the expansion tank are sequentially connected to form a cooling loop, and efficient cooling is achieved. Meanwhile, the high-temperature cooling liquid can also pass through a cockpit heater to form a warm air loop. When the driver feels that the temperature of the cockpit is low, the warm air loop can be started to provide warm air for the cockpit.
The cooling liquid circulation loop can work independently, when one, two or three range extender engines or even more range extender engines are started, the high-temperature cooling liquid is cooled for the corresponding range extender engines respectively, the cooling efficiency can be improved, and therefore efficient cooling is achieved. Meanwhile, when the vehicle load changes, the controller controls the starting number of the range extender engine according to different power requirements, and controls the working mode of the cooling device, so that the range extender engine can work at the optimal working temperature.
A set of preheating loop is arranged between the two range extender engines and comprises an electronic water pump and a one-way valve. The high-temperature coolant in the range extender engine which is started firstly can be introduced into the range extender engine which is started later, and the coolant in the range extender engine which is started later can also return to the range extender engine which is started firstly, so that a preheating loop is formed, and the preheating time of the range extender engine is shortened.
Further, when the power required by the vehicle is large, the controller can cut off the preheating loop, so that the cooling liquid circulation loop of each range extender engine works independently, and the cooling liquid circulation loops respectively realize high-efficiency cooling according to different working requirements required by each range extender engine.
Furthermore, in the multi-range extender engine cooling device, the number of the cooling liquid circulation loops of the matched range extender engine is consistent with that of the range extender engine.
Embodiment 3, this embodiment proposes an engine warm-up method based on a multi-range extender engine cooling device, as shown in fig. 5, which is a starting process of a warm-up loop, and specifically includes the following steps:
s1, starting a first range extender engine.
When the required output power of the vehicle is small, for example, when the vehicle is unloaded, an engine of the range extender can be started to provide power for the vehicle.
S2, detecting whether the temperature of the cooling liquid of the first range extender engine reaches a set temperature.
When the temperature of the cooling liquid reaches the set temperature, the engine is difficult to start only one range extender, and the engine needs to start a second range extender to provide larger output power. This may be the case when the vehicle is loaded, rather than unloaded.
And S3, starting the second range extender engine.
When the coolant temperature has reached the set point, the second range extender engine is started to provide greater power output to the vehicle.
And S4, starting the electronic water pump while starting the second range extender engine, and simultaneously opening the one-way valve, wherein the electronic water pump rapidly pumps the high-temperature cooling liquid in the first range extender engine into the second range extender engine to preheat the second range extender engine, so that the preheating time is shortened. The second range extender engine can quickly start to work, and meanwhile, the heat of the high-temperature cooling liquid is utilized, so that the heat cannot be lost, and can be recycled.
And the cooling liquid in the second range extender engine returns to the first range extender engine through the one-way valve to form a preheating loop and supplement the cooling liquid for the first range extender engine, so that all range extender engines work in a high-efficiency working area.
By the method, a preheating loop is formed between the two range extender engines, a large amount of heat in the high-temperature cooling liquid is effectively utilized, the preheating time is shortened, and the purposes of energy conservation and emission reduction are achieved. Meanwhile, when the vehicle needs a larger power output after the preheating is finished, the operation of the cooling liquid circulation loop needs to be preferentially ensured, and the closing process of the preheating loop is shown in fig. 6.
And S01, detecting the temperature of the cooling liquid of the second range extender engine, and comparing the temperature with a set temperature.
Because the cooling effect needs to be preferentially ensured, when the preheating loop is started, the cooling liquid can flow through the region outside the cooling liquid circulation loop, so that the cooling liquid can not flow back in time, and the cooling effect is poor. Therefore, the temperature of the coolant of the second range extender engine needs to be monitored in real time, when the temperature rises to the set temperature, the coolant is judged to be preheated, and the cooling effect needs to be preferentially ensured, so that the range extender engine can work in a high-efficiency working area.
S02, turning off the electronic water pump. And closing the electronic water pump and the one-way valve, cutting off a passage from the second range extender engine to the first range extender engine, and cutting off a passage from the first range extender engine to the second range extender engine, so that high-temperature cooling liquid is not provided for the second range extender engine. So that the preheating circuit is closed and the first cooling liquid circulation circuit and the second cooling liquid circulation circuit work independently.
At the moment, the preheating is finished, the preheating loop is closed, the cooling liquid circulation loop of each range extender engine works independently, the cooling effect is guaranteed preferentially, and larger output power is provided for the automobile.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A multiple range extender engine cooling apparatus, comprising: the system comprises a controller, a first cooling liquid circulation loop, a second cooling liquid circulation loop and a preheating loop;
the first cooling liquid circulation loop comprises a first cooling loop and a first warm air loop, the first cooling loop is used for cooling the first range extender engine, and the first warm air loop is used for providing warm air for the cab;
the second cooling liquid circulation loop comprises a second cooling loop and a second warm air loop, the second cooling loop is used for cooling the second range extender engine, and the second warm air loop is used for providing warm air for the cockpit;
the preheating loop comprises a one-way valve and an electronic water pump, and the electronic water pump can pump the high-temperature cooling liquid in the first cooling liquid circulation loop into the second cooling liquid circulation loop, so that the preheating time of the cooling liquid is shortened;
the controller is used for controlling the working state of the multi-range extender engine cooling device, and when the vehicle needs the work of the dual-range extender engine, the controller starts the first range extender engine and the corresponding first cooling liquid circulation loop;
when the temperature of the coolant in the first range extender engine rises to a preset temperature and indicates that the power demand of the vehicle is increased, the controller starts a second range extender engine and a corresponding second coolant circulation loop, starts an electronic water pump and opens a one-way valve, the coolant in the first range extender engine is pumped into the second range extender engine by the electronic water pump, and the coolant in the second range extender engine returns to the first range extender engine through the one-way valve;
when the temperature of the second range extender engine coolant rises to a preset temperature, indicating that the power demand of the vehicle is increased, the controller closes the electronic water pump and the check valve, and the first coolant circulation loop and the second coolant circulation loop operate independently.
2. The multi-range extender engine cooling apparatus of claim 1,
the first cooling liquid circulation loop provides high-temperature cooling liquid for the second cooling liquid circulation loop through the electronic water pump for preheating, and the second cooling liquid circulation loop provides cooling liquid with mixed temperature for the first cooling liquid circulation loop through the one-way valve to form a preheating loop.
3. The multiple range extender engine cooling apparatus of claim 2 further comprising: and the controller is used for selecting the working mode of the multi-range extender engine cooling device, and starting the first cooling liquid circulation loop according to the power requirement of the vehicle, or starting the first cooling liquid circulation loop firstly and then starting the second cooling liquid circulation loop.
4. The multiple range extender engine cooling apparatus of claim 3, wherein the controller activates the electric water pump and opens the check valve to activate the warm-up circuit when the temperature of the coolant in the first coolant circulation circuit rises to a set temperature.
5. The multiple range extender engine cooling apparatus of claim 3 wherein the controller shuts off the electric water pump and the check valve and shuts off the warm-up circuit when the temperature of the coolant in the second coolant circulation circuit rises to a set temperature.
6. The multiple range extender engine cooling apparatus of claim 1 wherein said warm air circuit includes a thermostat and a cockpit heater;
the high-temperature cooling liquid enters the cockpit heater through the thermostat, heats cold air, provides warm air for the cockpit, and then returns to the range extender engine to form a warm air loop.
7. The multiple range extender engine cooling apparatus of claim 1 wherein said cooling circuit comprises a thermostat, a radiator, an electronic fan and an expansion tank;
the high-temperature cooling liquid enters the radiator through the thermostat, is cooled through the electronic fan and then returns to the range extender engine through the expansion tank to form a cooling loop.
8. The multiple range extender engine cooling apparatus of claim 1 wherein said coolant circulation loops are independently operable.
9. The multiple range extender engine cooling arrangement of any one of claims 1 to 8 wherein the number of range extender engines is at least two and the number of coolant circulation circuits corresponds to the number of range extender engines.
10. A method of warming up an engine based on the multi range extender engine cooling device of any one of claims 1 to 9,
starting a first range extender engine;
detecting the temperature of cooling liquid of the first range extender engine, comparing the temperature with a set temperature, and acquiring the current power demand;
then starting the second range extender engine;
starting the electronic water pump, simultaneously opening the one-way valve, and pumping the high-temperature coolant in the first range extender engine into the second range extender engine by the electronic water pump;
detecting the temperature of the cooling liquid of the second range extender engine, comparing the temperature with a set temperature, and acquiring the current power demand;
and the electronic water pump and the one-way valve are closed, so that the preheating loop is closed, and the first cooling liquid circulation loop and the second cooling liquid circulation loop work independently.
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| CN109927534B (en) * | 2019-03-20 | 2023-04-25 | 天津大学 | Thermal management system and control method for hybrid power heavy truck |
| CN110043362B (en) * | 2019-04-01 | 2020-07-24 | 浙江吉利新能源商用车集团有限公司 | Cold start system for methanol vehicle |
| CN109969000B (en) * | 2019-05-08 | 2024-04-02 | 厦门市福工动力技术有限公司 | Range-extending system for pure electric vehicle |
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| CN108263202A (en) | 2018-07-10 |
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