CN113847140A - Range extender lubricating and cooling system, hybrid electric vehicle and control method - Google Patents

Range extender lubricating and cooling system, hybrid electric vehicle and control method Download PDF

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Publication number
CN113847140A
CN113847140A CN202111052220.5A CN202111052220A CN113847140A CN 113847140 A CN113847140 A CN 113847140A CN 202111052220 A CN202111052220 A CN 202111052220A CN 113847140 A CN113847140 A CN 113847140A
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China
Prior art keywords
oil
engine
generator
cooling
cooling system
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CN202111052220.5A
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Chinese (zh)
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CN113847140B (en
Inventor
欧阳丹
万建
张松
夏青松
严鑫映
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Dongfeng Motor Corp
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Dongfeng Motor Corp
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Publication of CN113847140A publication Critical patent/CN113847140A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
    • F01M5/021—Conditioning lubricant for aiding engine starting, e.g. heating by heating
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • 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
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

Abstract

The application discloses increase lubricated cooling system of journey ware belongs to increase journey hybrid vehicle technical field. This increase journey ware lubricating cooling system includes engine, generator, engine lubricating arrangement, generator cooling device and driving motor cooling system, and wherein, engine oil pan and generator oil pan pass through connecting tube intercommunication for the machine oil in the generator oil pan and the machine oil in the engine oil pan can flow each other and mix. Before the range extender is started, the cooling liquid in a cooling system of the driving motor is heated by heat emitted by a battery of the vehicle and the driving motor, and engine oil of the generator is heated by the heat exchanger, so that the engine oil in the generator and an engine oil pan is preheated. After the range extender is started, the generator cooling device cools the generator and simultaneously enables the engine oil in the generator oil pan to continue to be heated, so that the engine oil in the engine oil pan continues to be heated, the engine oil heating efficiency in the engine is accelerated, and meanwhile, the engine oil consumption is also reduced.

Description

Range extender lubricating and cooling system, hybrid electric vehicle and control method
Technical Field
The application belongs to the technical field of range-extended hybrid vehicles, and particularly relates to a range extender lubricating and cooling system, a hybrid vehicle and a control method.
Background
In the related art, a range extender of a range-extended hybrid electric vehicle comprises a fuel engine and a generator, wherein the engine outputs torque to the generator to generate electricity, and the generator charges a battery and supplies power to a driving motor. When the electric quantity of the vehicle is insufficient, the range extender is started to supplement the electric quantity of the vehicle. When the engine works, all parts of the engine need to be lubricated, and when the generator works, the stator of the generator needs to be cooled.
Currently, the lubrication system of the engine and the cooling system of the generator are two independent systems. When an engine is started at a low temperature, the viscosity of lubricating oil of the engine is high, which causes high abrasion and increased oil consumption of the engine, so that most of the existing engines use a cooling circulation system of the engine to absorb heat generated during combustion of the engine to heat the lubricating oil of the engine so as to reduce the viscosity of the oil. However, heating the oil consumes a portion of the heat of combustion of the engine, resulting in increased fuel consumption of the engine. Meanwhile, the engine cooling system heats engine oil to cause the temperature rise of engine cooling water to be slow, and the oil consumption of the engine and the warm air effect of the vehicle are influenced.
The engine and the generator are started only under the working condition that power generation is needed, wherein the generator needs to be cooled in the running process, and the engine needs to be lubricated in the running process. For cooling the generator, oil is generally used for cooling: and pumping the engine oil stored in the generator oil pan by using an oil pump, and spraying the engine oil onto a generator stator after cooling. For the lubrication of the engine, an oil pump is adopted to pump the engine oil in the oil pan of the engine, and the engine oil is cooled, filtered and pumped into the main oil duct of the engine to lubricate each friction pair.
Disclosure of Invention
The application aims to solve the technical problem that the oil consumption of the engine is increased by preheating the engine oil in the range extender at least to a certain extent. Therefore, the application provides a range extender lubricating and cooling system, a hybrid electric vehicle and a control method.
The lubricated cooling system of range extender that this application embodiment provided includes:
an engine having an engine oil pan and an engine lubricating oil gallery;
the engine lubricating device is connected with the engine oil sump and the engine lubricating oil channel and forms an engine lubricating loop so as to convey the engine oil in the engine oil sump into the engine lubricating oil channel;
the generator is provided with a generator oil sump and a generator cooling oil duct;
the generator cooling device is connected with the generator oil pan and the generator cooling oil duct and forms a generator oil cooling loop so as to convey the engine oil in the generator oil pan into the generator cooling oil duct; and the number of the first and second groups,
a drive motor cooling system, wherein cooling liquid in the drive motor cooling system exchanges heat with engine oil in the generator cooling loop;
the engine oil pan is communicated with the generator oil pan through a connecting pipeline.
In some embodiments, the generator cooling device includes a first oil pump and a first oil heat exchanger, an oil inlet of the first oil pump communicates with the generator oil pan, an oil outlet of the first oil pump communicates with an oil inlet of the first oil heat exchanger, an oil outlet of the first oil heat exchanger communicates with the generator cooling oil duct, and a water inlet and a water outlet of the first oil heat exchanger communicate with the driving motor cooling system and form a driving motor cooling loop.
In some embodiments, a nozzle is fixed in the generator, and the nozzle faces to the stator of the generator and is connected with the generator cooling oil passage.
In some embodiments, the engine lubricating device comprises a second oil pump and a second oil heat exchanger, an oil inlet of the second oil pump is communicated with the engine oil pan, an oil outlet of the second oil pump is communicated with an oil inlet of the second oil heat exchanger, and an oil outlet of the second oil heat exchanger is communicated with the engine lubricating oil channel.
In some embodiments, the range extender lubrication cooling system further comprises an engine cooling system connected with the water inlet and the water outlet of the second oil heat exchanger and constituting an engine cooling circuit, and the coolant in the engine cooling circuit is in heat exchange with the oil in the engine lubrication circuit in the second oil heat exchanger.
In some embodiments, at least one solenoid valve is provided on the connecting conduit.
In some embodiments, the lubrication cooling system further comprises a controller, a first temperature sensor disposed in the engine oil pan, a second temperature sensor disposed in the drive motor cooling system, and a battery level detection device connected to a vehicle battery.
The embodiment of the application also provides a hybrid electric vehicle which comprises the range extender lubricating and cooling system.
The embodiment of the application also provides a control method of the range extender lubricating and cooling system, which comprises the following steps:
the temperature of engine oil in an oil pan of the generator is obtained through a first temperature sensor, and the temperature of cooling liquid in a cooling system of the generator is obtained through a second temperature sensor;
before the range extender is started, the electromagnetic valve opens the connecting channel to communicate the engine oil pan and the generator oil pan and starts the generator cooling device;
and after the range extender is started, starting the engine lubricating device, and closing the connecting channel by the electromagnetic valve when the temperature of the engine oil in the oil pan of the generator is higher than the temperature of cooling liquid in a cooling system of the generator.
In some embodiments, before the range extender is started, the electric quantity in the vehicle battery is acquired through a battery electric quantity detection device, and when the electric quantity of the vehicle battery is lower than a preset electric quantity threshold value, the generator cooling device is started. .
The application has the following beneficial effects:
the application provides a lubricated cooling system of journey ware that increases, through connecting tube with generator oil pan and engine oil pan intercommunication for the machine oil in the generator oil pan and the machine oil in the engine oil pan can flow each other and mix. Before the programmer is started, the cooling liquid in a cooling system of the driving motor is heated by heat emitted by a battery of the vehicle and the driving motor, and engine oil of the generator is heated by the heat exchanger, so that the engine oil in the generator and an engine oil pan is preheated. After the range extender is started, the generator cooling device cools the generator, so that engine oil in the generator oil pan is heated, the engine oil in the engine oil pan is heated in a heat transfer mode, the engine oil heating efficiency in the engine is accelerated, the friction work of a friction pair in the engine is reduced, the service life of the friction pair is prolonged, and meanwhile, the heat provided by the engine cooling system for heating the engine oil in the engine can be reduced, so that the oil consumption of the engine is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 shows a schematic connection diagram of a range extender lubrication cooling system;
FIG. 2 is a schematic diagram showing the specific connection between the cooling system of the driving motor and the oil cooling circuit of the generator in FIG. 1;
FIG. 3 illustrates a control schematic of a range extender lubrication cooling control method; .
Reference numerals:
100-an engine; 110-engine sump; 120-a crankshaft;
200-a generator; 210 a generator sump; 220-a rotor; 230-a stator; 240-a nozzle;
300-connecting a pipe; 310-a solenoid valve;
410-a first oil pump; 420-a first oil heat exchanger; 430-a first conduit; 440-a second conduit; 450-a third conduit;
510-a second oil pump; 520-a second oil heat exchanger; 530-a fourth conduit; 540-a fifth conduit; 550-a sixth conduit;
600-drive motor cooling system; 610-a first water pump; 620-battery water jacket; 630-driving the motor water jacket; 640-a first heat sink;
700-an engine cooling system;
810-a first temperature sensor; 820-a second temperature sensor;
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.
It should be noted that all the directional indications in the embodiments of the present invention are only used to explain the relative position relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes 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 at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The application is described below with reference to specific embodiments in conjunction with the following drawings:
example one
The embodiment provides a range extender lubricating and cooling system, which is applied to a hybrid electric vehicle with a range extender, wherein a driving motor of the hybrid electric vehicle drives the vehicle to run, the electric quantity in a battery of the hybrid electric vehicle is continuously consumed, and when the electric quantity of the battery of the hybrid electric vehicle is insufficient, the range extender is started to supplement electric energy for the battery, so that the battery can continue to provide electric energy for the driving motor of the hybrid electric vehicle, and the driving mileage of the vehicle is improved.
As shown in fig. 1, the range extender lubrication cooling system includes an engine 100, a generator 200, an engine lubrication device, a generator cooling device, and a drive motor cooling system. The engine 100 and the generator 200 are main components of a range extender, the engine 100 is internally provided with a crankshaft 120, the generator 200 is internally provided with a stator 230 and a rotor 220 rotatably arranged in the stator 230, one end of the rotor 220 of the generator 200 is directly connected with one end of the crankshaft 120 of the engine 100 or connected through a coupler, so that after the engine 100 is started, the crankshaft 120 of the engine 100 can drive the rotor 220 of the generator 200 to synchronously rotate, the generator 200 can generate electric energy, and the purpose of generating electricity by the generator 200 and supplementing electric energy for a hybrid vehicle is achieved.
The bottom of engine 100 has an engine oil pan 110, oil for lubricating the various friction pairs in engine 100 is stored in engine oil pan 110, and a lubricating oil passage leading to the various friction pairs is provided in engine 100 casing 100. One end of the engine lubricating device is communicated with the engine oil pan 110, the other end of the engine lubricating device is communicated with the lubricating oil passage of the engine 100, the engine lubricating device can draw out the engine oil stored in the engine oil pan 110 and convey the engine oil into the lubricating oil passage of the engine 100, so that the engine oil enters the lubricating oil passage and flows to each friction pair of the engine 100 along the lubricating oil passage to lubricate the friction pairs, and the engine oil after lubricating the friction pairs can drip or flow back to the engine oil pan 110, so that the engine lubricating device, the engine oil pan 110 and the lubricating oil passage of the engine 100 form a complete engine lubricating loop.
The bottom of the generator 200 has a generator oil pan 210, cooling oil for cooling the stator 230 and/or the rotor 220 of the generator 200 is stored in the generator oil pan 210, and a cooling oil passage leading to the stator 230 and/or the rotor 220 of the generator 200 is provided in the housing of the generator 200. One end of the generator cooling device is communicated with the generator oil pan 210, and the other end of the generator cooling device is communicated with the cooling oil passage of the generator 200, so that the generator 200 cooling device can draw out the engine oil stored in the generator oil pan 210 and convey the engine oil to the cooling oil passage of the generator 200, the engine oil can flow to the stator 230 and/or the rotor 220 of the generator 200 along the cooling oil passage after entering the cooling oil passage, the stator 230 and/or the rotor 220 of the generator 200 are cooled by the cooling oil, and the cooling oil cooled by the stator 230 and/or the rotor 220 drips or flows back to the generator oil pan 210, so that the generator cooling device, the generator oil pan 210 and the cooling oil passage of the generator 200 form a complete generator 200 cooling loop.
Since the engine oil is used for lubricating the generator 200, and the engine oil is also used for cooling the generator 200, in the present embodiment, the generator oil pan 210 and the engine oil pan 110 are communicated through the connecting pipe 300, so that the cooling engine oil in the generator oil pan 210 and the lubricating engine oil in the engine 100 can be mixed together through the connecting pipe 300, so that the engine oil in the generator oil pan 210 and the engine oil in the engine oil pan 110 can be heated or cooled together.
In the present embodiment, the engine oil pan 110 and the generator oil pan 210 are located at substantially the same level, the end of the connection pipe 300 connected to the engine oil pan 110 is located below the oil level of the oil stored in the engine oil pan 110, and the end of the connection pipe 300 connected to the generator oil pan 210 is located below the oil level of the oil stored in the generator oil pan 210, so that it is ensured that the entire connection pipe 300 can be filled with the oil, and the oil does not flow in one direction due to the height difference between the engine oil pan 110 and the generator oil pan 210. Preferably, the connecting pipe 300 is a straight pipe or a bent pipe arranged horizontally. In the case of ensuring the communication between the engine oil pan 110 and the generator oil pan 210, the diameter of the connecting pipe 300 should be as large as possible to improve the heat exchange efficiency between the engine oil in the engine oil pan 110 and the engine oil in the generator oil pan 210.
After the range extender is started, the engine oil in the generator oil cooling circuit absorbs heat of the stator 230 and/or the rotor 220 when cooling the stator 230 and/or the rotor 220 of the generator 200, so that the temperature of the engine oil dripped into the generator oil pan 210 again after cooling the generator 200 is increased, the temperature of the engine oil in the whole generator oil pan 210 is increased, and the engine oil in the generator oil pan 210 with the increased temperature is mixed with the engine oil in the engine oil pan 110 through the connecting pipeline 300, so that the temperature of the engine oil in the engine oil pan 110 is increased in an accelerated manner. After the temperature of the engine oil in the engine oil pan 110 is increased, the viscosity of the engine oil can be reduced, so that the friction work of each friction pair is reduced when the engine 100 works, the oil consumption of the engine is reduced, and the service life of each friction pair of the engine 100 is prolonged.
In the correlation technique, the driving motor of the hybrid electric vehicle can generate a large amount of heat in the working process, and simultaneously, the battery can also generate a large amount of heat in the charging and discharging process, so that the related hybrid electric vehicle can be provided with the driving motor cooling system 600, and the driving motor and the battery of the hybrid electric vehicle are cooled through the driving motor cooling system 600. The drive motor cooling system 600 generally uses a cooling liquid as a cooling medium. The coolant in the driving motor cooling system 600 is increased in temperature after absorbing heat generated from the battery and the driving motor and forms a high-temperature coolant.
In the present embodiment, the drive motor cooling system 600 is used as a part of the range extender lubrication cooling system, and the coolant in the drive motor cooling system 600 exchanges heat with the engine oil in the engine lubrication circuit. When the range extender is not started and the driving motor drives the vehicle to run, the driving motor cooling system 600 participates in cooling the driving motor and the battery along with the operation of the driving motor, therefore, heat exchange is carried out between cooling liquid in the driving motor cooling system 600 and engine oil in a generator cooling circuit, the engine oil with the temperature lower than the temperature of the high-temperature cooling liquid can be heated by the high-temperature cooling liquid, the heated engine oil enters the generator oil pan 210 through the generator cooling circuit, the temperature of the engine oil in the whole generator oil pan 210 is increased, meanwhile, the temperature of the engine oil in the engine oil pan 110 is increased through the connecting pipeline 300, and the effect of preheating the engine oil in the engine oil pan 110 is achieved. The viscosity of the preheated engine oil is reduced, the oil consumption of the engine is reduced, and the service life of a friction pair in the engine is prolonged. Also, even after the range extender is started, the high-temperature coolant in the drive motor cooling system 600 has a heating effect on the oil in the generator oil pan 210 as long as the oil temperature in the generator oil pan 210 is not higher than the temperature of the coolant in the drive motor cooling system 600.
It should be noted that the generator cooling device in this embodiment may be started a certain time ahead before the range extender is started, so as to ensure that the oil in the engine oil pan 110 is preheated when the range extender is started. The advance time mentioned here can be set or adjusted according to different conditions of starting the range extender by different vehicles. The generator cooling device can also be started synchronously after the driving motor cooling system starts to work, so that the engine oil in the engine oil sump 110 can be ensured to be preheated when the range extender is started.
The cooling device of the generator 200 includes a first oil pump 410 and a first oil heat exchanger 420, and the first oil pump 410 and the first oil heat exchanger 420 both have an oil inlet and an oil outlet. The oil inlet of the first oil pump 410 is communicated with the generator oil pan 210 through a first pipeline 430, the oil outlet of the first oil pump 410 is communicated with the oil inlet of the first oil heat exchanger 420 through a second pipeline 440, and the oil outlet of the first oil heat exchanger 420 is communicated with the cooling oil passage in the generator 200 shell 200 through a third pipeline 450, so that the first oil pump 410 can send the engine oil in the generator oil pan 210 to the first oil heat exchanger 420, and the engine oil enters the cooling oil passage after being subjected to heat exchange by the first oil heat exchanger 420. The first engine oil heat exchanger 420 not only has an oil inlet and an oil outlet, but also has a water inlet and a water outlet, and the water inlet and the water outlet of the first engine oil heat exchanger 420 are communicated with the driving motor cooling system 600 to form a new driving motor cooling loop, so that the high-temperature cooling liquid in the driving motor cooling system 600 can exchange heat with the engine oil in the first engine oil heat exchanger 420.
It should be noted that, in the first oil heat exchanger 420, the high-temperature coolant does not contact and mix with the engine oil, and is indirect heat exchange through the partition wall. Since the first oil heat exchanger 420 is a conventional art, the detailed internal structure of the first oil heat exchanger 420 will not be described in detail in this embodiment.
As shown in fig. 2, in some embodiments, drive motor cooling system 600 includes a first water pump 610, a battery water jacket 620, a drive motor water jacket 630, and a first radiator 640; the battery water jacket 620 is arranged on a power battery of a vehicle, the driving motor water jacket 630 is arranged on the driving motor, and as the highest tolerant temperature of the battery is lower than the highest tolerant temperature of the driving motor in relevant requirements, the first water pump 610, the battery water jacket 620, the driving motor water jacket 630, the first engine oil heat exchanger 420 and the first radiator 640 are sequentially connected through pipelines to form the driving motor cooling loop, high-temperature cooling liquid exchanges heat at the first engine oil heat exchanger 420, enters the first radiator 640 for heat dissipation and cooling, and then is sequentially pumped to the battery water jacket 620 and the driving motor water jacket 630 through the first water pump 610 to absorb heat and then enters the first engine oil heat exchanger 420 to form the driving motor cooling loop.
It should be noted that, the specific structure of the driving motor cooling system 600 is different according to the vehicle type of the hybrid vehicle, and similarly, the connection position of the first oil heat exchanger 420 in the driving motor cooling system 600 may also be set according to the actual specific structure of the driving motor cooling system 600, as long as the high-temperature coolant in the driving motor cooling system 600 can flow through the first oil heat exchanger 420.
The temperature of the engine oil flowing through the first engine oil heat exchanger 420 may be increased or decreased according to the temperature of the engine oil entering the first engine oil heat exchanger 420 and the temperature of the heat exchange medium exchanging heat with the engine oil. The temperature of the oil flowing through first oil heat exchanger 420 is lower than the temperature of stator 230 and/or rotor 220 of generator 200 during operation, so that the oil can cool stator 230 and/or rotor 220 of generator 200.
In the present embodiment, the first oil pump 410 is an electric oil pump, the first oil pump 410 is electrically connected to a battery of a vehicle, and the first oil pump 410 is powered by the vehicle battery, so that when the range extender is not started, the first oil pump 410 can still be started by the battery power supply, and by using the electric oil pump as the first oil pump 410, the first oil pump 410 can be started at any time before the range extender is started. In addition, the place where the first pipe 430 communicates with the generator oil pan 210 is located on the connection pipe 300, that is, the first pipe 430 communicates with the connection pipe 300, and since the connection pipe 300 communicates with the generator oil pan 210, the first pipe 430 can communicate with the generator oil pan 210. The one end setting that even 210 of first pipeline and generator oil pan is on connecting tube 300 can make first oil pump 410 when extracting engine oil, not only can extract the engine oil in the generator oil pan 210, can also extract the engine oil in the extraction engine oil pan 110 for the mixture of the engine oil in the generator oil pan 210 and the engine oil in the engine oil pan 110, so that when increasing the journey ware and not starting, can accelerate the heating to the engine oil in the engine oil pan.
In some embodiments, the first oil pump 410 may also be a mechanical pump, and the first oil pump 410 is connected to a rotating shaft of the driving motor, and is started by the driving motor to drive the first oil pump 410 to start.
In addition, in the present embodiment, the cooling oil cools the stator 230 in the generator 200 by means of showering. Specifically, at least one nozzle 240 is fixed in generator 200, one end of nozzle 240 faces stator 230, and the other end is communicated with the third pipeline, so that engine oil is sprayed on stator 230 after entering nozzle 240, and an effect of uniformly and appropriately spraying engine oil on stator 230 is achieved. The nozzle 240 may be disposed above the stator 230 to spray downwards, or may be disposed at one side of the stator 230, for which, the embodiment does not limit the specific installation position of the nozzle 240.
In the related art, after the engine 100 is started, the combustion chamber of the engine 100 generates a large amount of heat, so that the temperature of the cylinder of the engine 100 is rapidly increased, and therefore, in the related engine 100, an engine water jacket is arranged around the combustion chamber and connected with the cooling water jacket through a second water pump in the engine cooling system 700, and when the temperature of the cylinder of the engine 100 exceeds an upper limit, the cylinder of the engine 100 is cooled by starting the circulating coolant in the cooling water jacket through the second water pump. Meanwhile, the temperature of the coolant passing through the cooling water jacket is raised due to heat absorption, a part of the heat of the heated coolant is used for heating engine oil in the engine, the other part of the heat is used for a heating system of the vehicle, and the rest of the heat is radiated through a second radiator in the engine cooling system 700, so that the coolant is in a low-temperature state when entering the engine water jacket. Since the engine cooling system 700 is a conventional technology, the detailed description of the specific structure of the engine cooling system 700 is not repeated in detail in this embodiment.
Therefore, in the present embodiment, after the generator oil pan 210 is communicated with the engine oil pan 110, the temperature of the engine oil in the engine oil pan 110 is accelerated by the engine oil in the generator 200, so that the heat of combustion during the operation of the engine 100 absorbed by the cooling circulation system of the engine 100 is reduced, and the heat consumed by the engine 100 itself to heat the engine oil is correspondingly reduced, thereby being beneficial to reducing the oil consumption of the engine 100.
The generator 200 cooling device may be integrated with the housing of the generator 200 or may be provided separately, which is not particularly limited in this application. Likewise, the lubricating device of the engine 100 may be integrated with the housing of the engine 100, or may be provided separately, and the present application is not particularly limited thereto.
The engine lubricating device comprises a second oil pump 510 and a second oil heat exchanger 520, the second oil pump 510 and the second oil heat exchanger 520 also have oil inlets and oil outlets, the oil inlet of the second oil pump 510 is communicated with the engine oil pan 110 through a fourth pipeline 530, the oil outlet of the second oil pump 510 is communicated with the oil inlet of the second oil heat exchanger 520 through a fifth pipeline 540, and the oil outlet of the second oil heat exchanger 520 is communicated with the main oil gallery of the engine 100 through a sixth pipeline 550, so that the second oil pump 510 extracts the oil in the engine oil pan 110 and pumps the oil into the second oil heat exchanger 520 for heat exchange, and the oil after heat exchange flows into the main oil gallery of the engine 100 and flows to the friction pair needing lubrication inside the engine 100 to lubricate the friction pair. The second oil heat exchanger 520 also has a water inlet and a water outlet, and the heat exchange medium enters the second oil heat exchanger 520 from the water inlet of the second oil heat exchanger 520, exchanges heat with the oil in the second oil heat exchanger 520, and is then discharged from the water outlet of the second oil heat exchanger 520.
In this embodiment, the second oil pump 510 of the engine 100 is a mechanical pump, the second oil pump 510 is fixed to the crankshaft 120 of the engine 100, and when the crankshaft 120 of the engine 100 operates, the second oil pump 510 is started along with the rotation of the crankshaft 120, so that when the engine 100 starts, the second oil pump 510 pumps lubricating oil to the lubricating oil passage at the same time, and the mechanical pump does not consume electric energy when operating.
In some embodiments, the second oil pump 510 of the engine 100 may also be an electric pump, the electric pump needs to consume a certain amount of electric energy, the range extender is usually started when the electric quantity of the vehicle is insufficient, and if the electric pump is adopted, a special control circuit needs to be further provided to control the second oil pump 510 to be started synchronously or started in advance when the engine 100 is started, and the arrangement and routing of the second oil pump are more cumbersome.
The water inlet and the water outlet of the second machine oil heat exchanger 520 are connected with the cooling system 700 of the engine 100 to form a second liquid cooling loop, so that the high-temperature cooling liquid heats the machine oil in the lubricating loop of the engine in the second machine oil heat exchanger 520, and the machine oil in the lubricating loop of the engine 100 can reach an ideal temperature more quickly.
In the related art, when the engine 100 continuously works, the temperature of lubricating oil in the engine 100 is continuously increased, because the ideal range of the temperature of the oil required for lubricating the engine 100 is 80-110 ℃, the viscosity of the oil with high oil temperature is low, the lubricating effect on friction pairs in the engine 100 is good, when the temperature of the oil is higher than 110 ℃, the temperature of cooling liquid in the engine 100 is reduced through a radiator in a cooling system 700 of the engine 100, and the temperature of the oil in an engine lubricating circuit is reduced through heat exchange between a second oil heat exchanger 520 and the oil in the engine lubricating circuit. The upper limit of the temperature of the coolant in the cooling system of the driving motor is 60 ℃, and the temperature of the coolant in the cooling system 600 of the driving motor exceeds 60 ℃, and then the heat is dissipated through the radiator in the cooling system 600 of the driving motor, so that the temperature of the coolant in the cooling system 600 of the driving motor is maintained below 60 ℃. Therefore, when the engine oil pan 110 and the generator oil pan 210 are communicated with each other, the temperature of the engine oil in the lubrication circuit of the engine 100 cannot be maintained within 80 to 110 ℃, the lubrication effect of the friction pair in the engine oil 100 is reduced, and the engine oil consumption is increased.
In this regard, in the present embodiment, a solenoid valve 310 is provided on the connection passage, and the solenoid valve 310 is used to open or close the connection passage, so that the engine oil pan 110 and the generator oil pan 210 are in a communicated or closed state. When the range extender is not started, the temperature of the engine oil is at normal temperature, and the control electromagnetic valve 310 opens the connecting channel, so that the engine oil in the engine oil pan 110 and the generator oil pan 210 can be warmed and preheated by the driving motor cooling system 600. When the range extender continues to work and the temperature of the engine oil in the oil pan 110 is higher than the upper limit (60 ℃) of the temperature of the cooling liquid in the driving motor cooling system 600, the control electromagnetic valve 310 is closed. The engine oil in the engine 100 is separated from the engine oil in the generator 200, so that the engine oil in the engine oil pan 110 does not exchange heat with the engine oil in the generator oil pan 210 any more, the engine oil in the engine 100 and the engine oil in the generator 200 are at different temperatures, the high oil temperature required by the engine oil in the engine 100 is ensured, and the relatively low temperature required by the engine oil in the generator 200 and the driving motor coolant is also ensured.
In this embodiment, the number of the electromagnetic valves 310 is one, the electromagnetic valves are connected to a control system of the vehicle, and the oil temperature in the engine oil pan 110 and the oil temperature in the generator oil pan 210 monitored by the control system of the vehicle are automatically controlled.
In some embodiments, the solenoid valve 310 may also be connected to a control switch, manually controlled by the driver.
In some embodiments, the number of the electromagnetic valves 310 may be multiple, and the multiple electromagnetic valves 310 are arranged on the connecting pipeline 300 at intervals, so that after the multiple electromagnetic valves 310 close the connecting pipeline 300 at the same time, a thermal bridge is formed between every two adjacent electromagnetic valves 310, and heat exchange between the oil with high temperature in the engine 100 and the oil with low temperature in the generator 200 is further prevented.
It should be noted that, after the electromagnetic valve 310 is disposed on the connection pipe 300, one end of the first pipe 430, which is communicated with the generator oil pan 210, may be directly connected to the generator oil pan 210, or may be connected to the connection pipe 300 between the electromagnetic valve 310 and the generator 200, so as to ensure that the first oil pump 410 can still pump the engine oil in the generator oil pan 210 through the first pipe 430 after the electromagnetic valve 310 closes the connection pipe.
Further, the present embodiment is provided with a first temperature sensor 810 in the generator oil pan 210 for monitoring the real-time temperature of the engine oil in the engine oil pan 210, and is provided with a second temperature sensor 820 in the driving motor cooling system 600, wherein the second temperature sensor 820 is used for monitoring the temperature of the cooling liquid entering the first engine oil heat exchanger 420. Preferably, the second temperature sensor 820 is disposed at a water inlet of the first oil heat exchanger 420, so that the real-time temperature of the cooling fluid entering the first oil heat exchanger 420 can be measured more accurately. The solenoid valve 310 is controlled to be opened or closed by comparing the temperatures detected by the first temperature sensor 810 and the second temperature sensor 820.
Example two
The embodiment provides a hybrid vehicle with the range extender cooling system. By the range extender cooling system, when the range extender is not started, the engine oil in the range extender is heated by absorbing heat generated during charging and discharging of a battery of a vehicle and heat generated during working of the driving motor through the driving motor cooling system 600, and other electric energy does not need to be consumed. Meanwhile, after the range extender is started, the cooling liquid in the driving motor cooling system 600 can continue to heat the engine oil in the range extender within a certain time, so that the oil consumption of the engine is reduced.
EXAMPLE III
The embodiment provides a control method for controlling the range extender lubricating and cooling system, which comprises the following steps:
the real-time temperature of the engine oil in the generator oil pan 210 is obtained through the first temperature sensor arranged in the generator oil pan 210, and the temperature of the coolant in the driving motor cooling system 600, which is the temperature before heat exchange with the engine oil, is obtained through the second temperature sensor arranged in the driving motor cooling system 600.
Under the condition that the electric quantity of the vehicle is sufficient, the vehicle is under a pure electric working condition, a driving motor of the vehicle is started, but the range extender is not started. The oil temperature in the engine oil pan 110 and the oil temperature in the generator oil pan 210 are both normal temperature, and the electromagnetic valve 310 opens the connection passage, so that the oil in the engine oil pan 110 and the oil in the generator oil pan 210 can flow and mix with each other. Meanwhile, the generator cooling device is also in a starting state, so that the engine oil in the generator continuously flows in the generator oil cooling loop under the action of the generator cooling device, the cooling liquid in the driving motor cooling system of the vehicle absorbs the heat generated when the vehicle battery is charged and discharged and the heat generated when the driving motor drives the vehicle to run, the heat is changed into high-temperature cooling liquid, the high-temperature cooling liquid exchanges heat with the engine oil in the engine lubricating loop and heats the engine oil, the heated engine oil returns to the generator oil pan 210 through the motor oil cooling loop, the heated engine oil in the generator is mixed with the normal-temperature engine oil in the engine, the temperature of the engine oil in the engine oil pan 110 is increased, and the purpose of preheating the engine oil in the engine when the range extender is not started is achieved.
When the electric quantity of the vehicle is insufficient and the electric quantity needs to be supplemented, the range extender intervenes. After the range extender is started, the engine lubrication device is started together, the range extender can replenish the electric quantity of the vehicle battery, and the engine in the range extender works to enable the temperature of the engine oil in the engine oil pan 110 to be continuously increased. When the temperature of the oil in the generator oil pan 210 is higher than the temperature of the cooling liquid in the drive motor cooling system 600, the solenoid valve 310 closes the connection passage, so that the oil in the engine oil pan 110 and the oil in the generator oil pan 210 are disconnected from each other, so that the oil in the engine oil pan 110 is maintained at the oil temperature required for lubrication of the engine 100, and the oil in the generator oil pan 210 is maintained at the temperature required for driving the motor cooling liquid.
When the vehicle electric quantity is recovered to be sufficient again, the range extender is closed, and the engine lubricating device is also closed along with the range extender or is closed after delay. In addition, the generator cooling device can be closed along with the range extender, and can also be closed along with the driving motor.
By the control method, before the range extender is started, the engine oil in the engine oil pan 110 and the engine oil in the generator oil pan 210 are preheated by the high-temperature cooling liquid in the driving motor cooling system 600 after the heat of the battery and the driving motor is absorbed, so that the viscosity of the engine oil is reduced, and the oil consumption of the engine 100 is reduced. After the engine 100 is started, the high-temperature coolant in the motor cooling system 600 is driven to continuously heat the engine oil in the engine oil pan 110 and the engine oil in the generator oil pan 210, so that the heat provided by the coolant in the engine 100 cooling system 700 for heating the engine oil is reduced while the temperature of the engine oil is increased, the temperature increase speed of the engine 100 coolant is increased, and the oil consumption of the engine 100 can be reduced. And when the oil temperature of the generator oil pan 210 exceeds the temperature limit (60 ℃) of the cooling liquid in the driving motor cooling system 600, the electromagnetic valve 310 disconnects the generator 200 from the engine oil pan 110, so that the phenomenon that the oil temperature of the engine 100 is too low or the oil temperature of the generator 200 is too high is avoided, the engine 100 and the generator 200 work at the optimal oil temperature respectively, and the respective operation efficiency and reliability are ensured. So that the temperature of the engine oil in the engine can be kept higher than 60 ℃, and the temperature of the engine oil in the generator can be kept below 60 ℃.
As shown in fig. 3, the electric quantity of the vehicle battery is obtained by the electric quantity monitoring device, and further, the first temperature sensor 810, the second temperature sensor 820, the electric quantity monitoring device and the solenoid valve are all connected to the controller, and the controller receives the temperature values detected by the first temperature sensor 810 and the second temperature sensor 820 and the residual electric quantity of the vehicle battery detected by the electric quantity monitoring device, and controls the solenoid valve to open or close.
In this embodiment, the controller may be a control system ECU of the vehicle, and since the vehicle itself has the battery level monitoring device, the controller may directly read a remaining level value on a dashboard of the vehicle or a console of the vehicle, without additionally providing the controller and the battery level monitoring device.
In addition, the battery valve 310 may open the connection passage 300 until the range extender is not activated, or the solenoid valve 310 may be controlled to open the connection passage 300 for a certain period of time before the battery power reaches a threshold power required to activate the range extender, according to the remaining power of the vehicle.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Claims (10)

1. A range extender lubrication cooling system, comprising:
an engine having an engine oil pan and an engine lubricating oil gallery;
the engine lubricating device is connected with the engine oil sump and the engine lubricating oil channel and forms an engine lubricating loop so as to convey the engine oil in the engine oil sump into the engine lubricating oil channel;
the generator is provided with a generator oil sump and a generator cooling oil duct;
the generator cooling device is connected with the generator oil pan and the generator cooling oil duct and forms a generator oil cooling loop so as to convey the engine oil in the generator oil pan into the generator cooling oil duct; and the number of the first and second groups,
a drive motor cooling system, wherein cooling liquid in the drive motor cooling system exchanges heat with engine oil in the generator cooling loop;
the engine oil pan is communicated with the generator oil pan through a connecting pipeline.
2. The lubrication cooling system according to claim 1, wherein the generator cooling device comprises a first oil pump and a first oil heat exchanger, an oil inlet of the first oil pump is communicated with the generator oil pan, an oil outlet of the first oil pump is communicated with an oil inlet of the first oil heat exchanger, an oil outlet of the first oil heat exchanger is communicated with the generator cooling oil duct, and a water inlet and a water outlet of the first oil heat exchanger are communicated with the driving motor cooling system to form a driving motor cooling loop.
3. The lubrication cooling system according to claim 2, wherein a nozzle is fixed within the generator, the nozzle facing the stator of the generator and communicating with the generator cooling gallery.
4. The lubrication cooling system according to claim 1, wherein said engine lubrication apparatus includes a second oil pump and a second oil heat exchanger, an oil inlet of said second oil pump is communicated with said engine oil pan, an oil outlet of said second oil pump is communicated with an oil inlet of said second oil heat exchanger, and an oil outlet of said second oil heat exchanger is communicated with said engine lubrication oil passage.
5. The lubrication and cooling system of claim 4, further comprising an engine cooling system connected to the water inlet and the water outlet of the second oil heat exchanger and forming an engine cooling circuit, wherein coolant in the engine cooling circuit exchanges heat with oil in the engine lubrication circuit in the second oil heat exchanger.
6. The lubrication cooling system according to claim 1, wherein at least one solenoid valve is provided on said connecting conduit.
7. The lubrication and cooling system according to claim 6, further comprising a controller, a first temperature sensor disposed in said engine oil pan, a second temperature sensor disposed in said drive motor cooling system, and a battery charge level detection device connected to a vehicle battery.
8. A hybrid vehicle comprising the range extender lubrication cooling system of any one of claims 1-7.
9. A control method, characterized by comprising the steps of:
the temperature of engine oil in an oil pan of the generator is obtained through a first temperature sensor, and the temperature of cooling liquid in a cooling system of the generator is obtained through a second temperature sensor;
before the range extender is started, the electromagnetic valve opens the connecting channel to communicate the engine oil pan and the generator oil pan and starts the generator cooling device;
after the range extender is started, the engine lubricating device is started, and when the temperature acquired by the first temperature sensor is higher than the temperature acquired by the second temperature sensor, the electromagnetic valve closes the connecting channel.
10. The control method according to claim 9, characterized in that before the range extender is started, the charge in the vehicle battery is acquired by a battery charge detection device, and the generator cooling device is started when the charge of the vehicle battery is lower than a preset charge threshold.
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