CN114575987A - Novel cooling system of whole car - Google Patents

Novel cooling system of whole car Download PDF

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Publication number
CN114575987A
CN114575987A CN202210326835.0A CN202210326835A CN114575987A CN 114575987 A CN114575987 A CN 114575987A CN 202210326835 A CN202210326835 A CN 202210326835A CN 114575987 A CN114575987 A CN 114575987A
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CN
China
Prior art keywords
temperature
cooling
water pump
water
circulation
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Pending
Application number
CN202210326835.0A
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Chinese (zh)
Inventor
赵宏霞
朱青松
李欢欢
王楠
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Beijing Polytechnic
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Beijing Polytechnic
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Priority to CN202210326835.0A priority Critical patent/CN114575987A/en
Publication of CN114575987A publication Critical patent/CN114575987A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/028—Deaeration devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/029—Expansion reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/08—Arrangements of lubricant coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/14—Indicating devices; Other safety devices
    • F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

The invention belongs to the technical field of automobile engines, and particularly relates to a novel cooling system for a whole automobile. The invention provides a novel cooling system for a whole vehicle.A cylinder body water jacket and a cylinder cover water jacket in a high-temperature cooling circulation loop are respectively cooled by liquid flow loops, so that each part of an engine can work at an optimal temperature set point, the overall efficiency of the novel cooling system for the whole vehicle is maximized, and each cooling loop can work at different cooling temperature set points or flow velocities, so that ideal engine temperature distribution is created; the low-temperature cooling circulation loop is supplied with cooling liquid by the second water pump, so that the cooling liquid is timely supplied when the emergency stop, the neutral gear sliding and the element normally operate are ensured, the water temperature at the inlet of the component to be cooled is ensured to be lower, the cooling effect is good, and the work is reliable.

Description

Novel cooling system of whole car
Technical Field
The invention belongs to the technical field of automobile engines, and particularly relates to a novel cooling system for a whole automobile.
Background
With the rapid development of modern automobile technology, people not only pay attention to the good dynamic property of the automobile, but also have higher requirements on the economy and the comfort of the automobile.
The cooling system is an important component of the engine, and the well-designed cooling system can ensure that the power device and related components can operate under ideal conditions, such as no overheating, quick warm-up, constant temperature maintenance or strict temperature change range and the like in all operating states, so that the service life of the engine is prolonged, the maintenance cost, the emission and the oil consumption are reduced, and the economical efficiency and the comfort of an automobile are improved.
The cooling system of the existing engine adopts the traditional arrangement and connection mode: only one cooling cycle is needed, which is not easy to achieve precise control, is not beneficial to forming ideal temperature distribution and reduces the efficiency of a cooling system. While also being detrimental to the economy of the engine.
Disclosure of Invention
In order to solve the problems, the invention provides a novel cooling system for a whole vehicle.
The specific technical scheme of the invention is as follows:
the invention provides a novel cooling system for a whole vehicle, which comprises a high-temperature cooling circulation loop and a low-temperature cooling circulation loop; the high-temperature cooling circulation loop comprises a first cooling loop, a second cooling loop, a first water pump, a cylinder body water jacket, a cylinder cover water jacket and an automatic temperature regulating valve which are independent of each other, inlets of the cylinder body water jacket and the cylinder cover water jacket are connected with a water outlet of the first water pump, the first cooling loop and the second cooling loop are connected in parallel and then are arranged between outlets of the cylinder cover water jacket and the cylinder body water jacket and a water return port of the first water pump, the automatic temperature regulating valve is arranged between the cylinder body water jacket and the first cooling loop, and the cylinder body water jacket is controlled to be cooled through the first cooling loop and/or the second cooling loop when the temperature reaches a preset temperature;
the low-temperature cooling circulation loop comprises a second water pump, and a component to be cooled and a low-temperature radiator which are connected with the second water pump in series, wherein the component to be cooled is used for cooling corresponding parts when the emergency shutdown or the braking is in a dangerous working condition.
In a further improvement, the automatic temperature regulating valve comprises a high-temperature thermostat and a low-temperature thermostat, and the opening temperature t2 of the high-temperature thermostat is greater than the opening temperature t1 of the low-temperature thermostat; the high-temperature thermostat is arranged between the cylinder water jacket and the first cooling loop; one end of the low-temperature thermostat is connected with a water return port of the first water pump, and the other end of the low-temperature thermostat is connected with the second cooling loop; the high-temperature cooling circulation loop further comprises a small circulation loop, the small circulation loop comprises a circulation pipeline, one end of the circulation pipeline is connected with the low-temperature thermostat, and the other end of the circulation pipeline is connected with the cylinder cover water jacket and the high-temperature thermostat respectively.
The improved structure is characterized in that the component to be cooled comprises a supercharger cooler, a brake cooler and an intercooler which are connected in parallel, the outlets of the supercharger cooler, the brake cooler and the intercooler are connected with the low-temperature radiator, and the inlet of the supercharger cooler, the brake cooler and the intercooler is connected with the water outlet of the second water pump.
In a further improvement, an inlet of the brake cooler is connected with a water outlet of the second water pump through a first throttling valve.
The first cooling loop comprises an engine oil cooler, a warm air blower and a gearbox cooler which are connected in parallel, outlets of the engine oil cooler, the warm air blower and the gearbox cooler are all connected with a water return port of a first water pump, and inlets of the engine oil cooler, the warm air blower and the gearbox cooler are respectively connected with a high-temperature thermostat and a cylinder cover water jacket;
the second cooling loop comprises a high-temperature radiator, an inlet of the high-temperature radiator is respectively connected with the high-temperature thermostat and the cylinder cover water jacket, and an outlet of the high-temperature radiator is connected with the low-temperature thermostat.
In a further improvement, the inlet of the oil cooler is connected in series with a second throttle valve, and a series loop formed by the oil cooler and the second throttle valve is connected in parallel with the fan heater. .
The temperature of cooling liquid in the novel cooling system of the whole vehicle is t, when t is less than t1, a small circulation mode is entered, in the small circulation mode, both a low-temperature thermostat and a high-temperature thermostat are closed, and the cooling liquid passes through a water jacket of a cylinder cover and then returns to a first water pump through an engine oil cooler, a fan heater, a gearbox cooler and a small circulation loop to continue circulation;
when t1 is greater than t < t2, a first large circulation mode is entered, in the first large circulation mode, a low-temperature thermostat is opened, a high-temperature thermostat is closed, after cooling liquid passes through a cylinder cover water jacket, a first part of cooling liquid returns to a first water pump through a high-temperature radiator to continue circulation, a second part of cooling liquid returns to the first water pump through an engine oil cooler, a warm air blower and a gearbox cooler to continue circulation, and a third part of cooling liquid directly returns to the first water pump through a small circulation loop to continue circulation;
and when t is greater than t2, entering a second large circulation mode, wherein in the second large circulation mode, the low-temperature thermostat and the high-temperature thermostat are both opened, part of the cooling liquid returns to the first water pump for continuous circulation after passing through the cylinder body water jacket and the high-temperature radiator, the other part of the cooling liquid returns to the first water pump for continuous circulation after passing through the cylinder cover water jacket, the other part of the cooling liquid returns to the first water pump for continuous circulation after passing through the high-temperature radiator, and the rest of the cooling liquid returns to the first water pump for continuous circulation after passing through the engine oil cooler, the fan heater and the gearbox cooler.
In a further improvement, the low-temperature cooling circulation loop carries out independent circulation, the second water pump starts to work, and cooling liquid passes through the supercharger cooler, the intercooler and the brake cooler and is cooled by the low-temperature radiator to continue circulation.
In a further improvement, the first water pump is a mechanical water pump, and the second water pump is an electronic water pump.
In a further improvement, the high-temperature cooling circulation loop and the low-temperature cooling circulation loop share one expansion water tank, and a liquid supplementing port of the expansion water tank is respectively connected with a second water pump and the first water pump through a low-temperature thermostat and is used for supplementing cooling liquid to the high-temperature radiator, the cylinder body water jacket and the cylinder cover water jacket at the water inlet of the first water pump in the high-temperature cooling circulation loop and supplementing cooling liquid to the water inlet of the second water pump in the low-temperature cooling circulation loop;
expansion tank still connects first degasification pipeline and second degasification pipeline, first degasification pipeline includes first check valve, the one end of first check valve is connected expansion tank, the other end connect high temperature radiator department of intaking and cylinder cap water jacket department of going out respectively, second degasification pipeline includes the second check valve, the one end of second check valve is connected expansion tank, the other end is connected to low temperature radiator department of intaking.
The invention has the following beneficial effects:
the invention provides a novel cooling system for a whole vehicle.A cylinder body water jacket and a cylinder cover water jacket in a high-temperature cooling circulation loop are respectively cooled by liquid flow loops, so that each part of an engine can work at an optimal temperature set point, the overall efficiency of the novel cooling system for the whole vehicle is maximized, and each cooling loop can work at different cooling temperature set points or flow velocities, so that ideal engine temperature distribution is created; the low-temperature cooling circulation loop is supplied with cooling liquid by the second water pump, so that the cooling liquid is timely supplied when the emergency stop, the neutral gear sliding and the element normally operate, the water temperature at the inlet of the component to be cooled is low, the cooling effect is good, and the work is reliable.
Drawings
Fig. 1 is a structural block diagram of a novel cooling system of a whole vehicle in the invention.
Detailed Description
The invention is further described with reference to the following figures and examples, which are provided for the purpose of illustrating the general inventive concept and are not intended to limit the scope of the invention.
The invention provides a novel cooling system for a whole vehicle, which comprises a high-temperature cooling circulation loop 100 and a low-temperature cooling circulation loop 200, as shown in figure 1; the high-temperature cooling circulation loop 100 comprises a first cooling loop, a second cooling loop, a first water pump 101, a cylinder body water jacket 102, a cylinder cover water jacket 103 and an automatic temperature regulating valve, wherein the cylinder body water jacket 102 and the cylinder cover water jacket 103 are independent of each other, inlets of the cylinder body water jacket 102 and the cylinder cover water jacket 103 are both connected with a water outlet of the first water pump 101, the first cooling loop and the second cooling loop are connected in parallel and then are arranged between outlets of the cylinder cover water jacket 103 and the cylinder body water jacket 102 and a water return port of the first water pump 101, the automatic temperature regulating valve is arranged between the cylinder body water jacket 102 and the first cooling loop, and when the temperature reaches a preset temperature, the cylinder body water jacket 102 is controlled to be cooled by the first cooling loop and/or the second cooling loop;
the low-temperature cooling circulation loop 200 includes a second water pump 201, and a component to be cooled, which is used for cooling a corresponding component in an emergency stop or a braking dangerous condition, and a low-temperature radiator 202 connected in series with the second water pump 201.
The invention provides a novel cooling system for a whole vehicle.A cylinder body water jacket and a cylinder cover water jacket in a high-temperature cooling circulation loop are respectively cooled by liquid flow loops, so that each part of an engine can work at an optimal temperature set point, the overall efficiency of the novel cooling system for the whole vehicle is maximized, and each cooling loop can work at different cooling temperature set points or flow velocities, so that ideal engine temperature distribution is created; the low-temperature cooling circulation loop is supplied with cooling liquid by the second water pump, so that the cooling liquid is timely supplied when the emergency stop, the neutral gear sliding and the element normally operate are ensured, the water temperature at the inlet of the component to be cooled is ensured to be lower, the cooling effect is good, and the work is reliable.
It can be understood that the ideal thermal operating state of the engine is that the temperature of the cylinder cover (i.e. the cylinder cover water jacket in the present application) is low, the temperature of the cylinder body (i.e. the cylinder cover water jacket in the present application) is relatively high, the low temperature of the cylinder cover can improve the charging efficiency, increase the air inflow, promote the complete combustion, improve the output power, and simultaneously reduce the formation of CO, HC and NOx, and the high temperature of the cylinder body can reduce the friction loss, directly improve the fuel efficiency, and indirectly reduce the peak pressure and temperature in the cylinder;
the temperature difference between the cylinder cover and the cylinder body is 100 ℃, the temperature of the cylinder can reach 150 ℃, the temperature of the cylinder cover can be reduced by 50 ℃, and the friction loss of the cylinder body and the oil consumption are reduced. The higher cylinder temperature reduces oil consumption by 4-6%, and HC by 20-35% at part load.
The thermostat valve in this embodiment includes a high-temperature thermostat 104 and a low-temperature thermostat 105, and the opening temperature t2 of the high-temperature thermostat 104 is greater than the opening temperature t1 of the low-temperature thermostat 105; the high-temperature thermostat 104 is arranged between the cylinder water jacket 102 and the first cooling circuit; one end of the low-temperature thermostat 105 is connected with a water return port of the first water pump 101, and the other end of the low-temperature thermostat is connected with the second cooling loop; the high-temperature cooling circulation loop 100 further comprises a small circulation loop, the small circulation loop comprises a circulation pipeline 106, one end of the circulation pipeline 106 is connected with the low-temperature thermostat 105, and the other end of the circulation pipeline 106 is connected with the cylinder cover water jacket 103 and the high-temperature thermostat 104 respectively. In the embodiment, the high-temperature thermostat is blocked when not opened, the corresponding pipeline does not leak water, the low-temperature thermostat is normally connected with the pipeline and can leak water when not opened, and therefore when the high-temperature thermostat and the low-temperature thermostat are both closed, the cooling liquid in the circulating pipeline can enter the first water pump through the low-temperature thermostat, namely the small circulating loop is communicated.
In the embodiment, the cooling liquid is separated according to the temperature requirement by the double thermostats, one part of the cooling liquid passes through the engine cylinder (namely, the cylinder water jacket in the invention), and the other part of the cooling liquid passes through the cylinder cover (namely, the cylinder water jacket in the invention) and is used for cooling the combustion chamber; the high-temperature thermostat controls the cooling of the engine cylinder body, and the low-temperature thermostat controls the cooling of the cylinder cover; it has the following effects:
1) the cylinder block is heated quickly, so that the friction and the like in the crankshaft connecting rod mechanism can be reduced;
2) the cylinder head is well cooled, reducing the temperature of the combustion chamber, increasing volumetric efficiency and reducing the likelihood of knocking. The cooling efficiency of the system is improved;
3) the temperature of the cylinder block can be kept in a higher range, the friction loss is reduced, the fuel efficiency is improved, and the peak pressure and the temperature in the cylinder are indirectly reduced.
When the two thermostats are fully opened, the temperature set values of the cylinder cover and the cylinder body can be adjusted to 50 ℃ and 90 ℃, the opening temperature of the thermostats can be changed according to different system designs, and meanwhile, the electronic thermostats can also be used for replacing the traditional thermostats.
In this embodiment, the component to be cooled includes a supercharger cooler 203, a brake cooler 204, and an intercooler 205 connected in parallel, outlets of the supercharger cooler 203, the brake cooler 204, and the intercooler 205 are connected to the low-temperature radiator 202, and an inlet of the supercharger cooler 203, the brake cooler 204, and the intercooler 205 is connected to a water outlet of the second water pump 201.
The brake cooler is arranged in the embodiment and is arranged in low-temperature circulation, the second water pump provides circulating cooling liquid, the situation that the brake cannot work safely and reliably due to heat fading under the braking dangerous working conditions such as continuous downhill and the like and the brake fails is improved, and the phenomenon that the brake cannot be cooled under the condition that a mechanical water pump does not work such as neutral sliding and the like is also avoided;
the supercharger cooler is cooled by low-temperature circulation, so that the conditions of insufficient local flow of cooling liquid in a water jacket of the cylinder body and insufficient flow of the cooling liquid of the supercharger cooler caused by water taking in the cylinder body are avoided; in emergency shutdown, the supercharger cooler can ensure enough cooling liquid to flow through, and the failure of element function caused by overheating can be avoided.
In this embodiment, the inlet of the brake cooler 204 is connected to the outlet of the second water pump 201 through a first throttle valve 206.
In the embodiment, the first cooling circuit comprises an oil cooler 107, a warm air blower 108 and a gearbox cooler 109 which are connected in parallel, outlets of the oil cooler 107, the warm air blower 108 and the gearbox cooler 109 are all connected with a water return port of a first water pump 101, and inlets of the oil cooler 107, the warm air blower 108 and the gearbox cooler 109 are respectively connected with a high-temperature thermostat 104 and a cylinder cover water jacket 103;
the second cooling loop comprises a high-temperature radiator 111, an inlet of the high-temperature radiator 111 is connected with the high-temperature thermostat 104 and the cylinder cover water jacket 103 respectively, and an outlet of the high-temperature radiator 111 is connected with the low-temperature thermostat 105.
In the embodiment, the water inlet of the cooler of the gearbox is connected with other water ways in parallel at the water outlet rear end of the cylinder cover of the cylinder body, and the flowability of the cooling liquid in the water jacket cannot be influenced. The gearbox cooler can reduce the temperature of gearbox oil, improves the condition that the temperature of the internal gear of the gearbox is too high, avoids abnormal wear of the gear, and prolongs the service life of the gearbox.
In this embodiment, at least one of the housing of the low-temperature thermostat and the housing of the high-temperature thermostat is integrated on the housing of the first water pump. The water pump is arranged on the air inlet side of the cylinder body and is driven by the balance shaft; the water pump and the high-temperature thermostat and the low-temperature thermostat are modularized and integrated, so that the space is saved, and peripheral pipelines are reduced.
In this embodiment, the inlet of the oil cooler 107 is connected in series with a second throttle valve 110, and the serial loop formed by the oil cooler 107 and the second throttle valve 110 is connected in parallel with the fan heater 108.
The embodiment can realize the variable regulation of the flow of the cooling water channel with more accurate requirement on the temperature according to the requirement: for example, when the water path of the engine oil cooler needs to be rapidly heated during cold start, the diameter of the electromagnetic throttle valve (namely, a second throttle valve) of the water path needs to be increased, so that the engine oil temperature can rapidly reach a reasonable temperature range; and (3) closing a water path electromagnetic throttle valve (namely a first throttle valve) of the brake cooler in a normal running state, and opening the brake to cool in time when the temperature of the brake is alarmed.
The oil cooler is arranged at the water outlet rear end of the cylinder body cylinder cover and connected with other water ways in parallel in the embodiment, the liquidity of cooling liquid in the water jacket cannot be influenced, meanwhile, the electromagnetic control throttle valve (namely, the second throttle valve) is additionally arranged on the water way of the engine cooler, the flow of the engine cooler can be adjusted according to different engine oil states required by the engine under different working conditions, the working temperature of lubricating oil can meet the requirements of different working conditions, the lubrication of the engine and parts of the engine is good, the service life is prolonged, and the fuel economy is improved.
In the embodiment, the temperature of the cooling liquid in the novel cooling system of the whole vehicle is t, when t is less than t1, the novel cooling system enters a small circulation mode, in the small circulation mode, both the low-temperature thermostat 105 and the high-temperature thermostat 104 are closed, and the cooling liquid returns to the first water pump 101 through the engine oil cooler 107, the warm air blower 108, the gearbox cooler 109 and the small circulation loop after passing through the cylinder cover water jacket 103 to continue to circulate;
when t1< t < t2, entering a first large circulation mode, wherein in the first large circulation mode, a low-temperature thermostat 105 is opened, a high-temperature thermostat 104 is closed, after cooling liquid passes through a cylinder cover water jacket 103, a first part of cooling liquid returns to a first water pump 101 through a high-temperature radiator 111 to continue to circulate, a second part of cooling liquid returns to the first water pump 101 through an engine oil cooler 107, a fan heater 108 and a gearbox cooler 109 to continue to circulate, and a third part of cooling liquid directly returns to the first water pump 101 through a small circulation loop to continue to circulate;
when t > t2, a second major circulation mode is entered, in the second major circulation mode, both the low-temperature thermostat 105 and the high-temperature thermostat 104 are opened, a part of the cooling liquid returns to the first water pump 101 through the cylinder water jacket 102 and the high-temperature radiator 111 to continue circulation, another part of the cooling liquid returns to the first water pump 101 through the high-temperature radiator 111 to continue circulation after passing through the cylinder head water jacket 103, and the rest of the cooling liquid returns to the first water pump 101 through the oil cooler 107, the warm air blower 108 and the gearbox cooler 109 to continue circulation.
In this embodiment, the low-temperature cooling circulation circuit 200 circulates independently, the second water pump 201 starts to operate, and the coolant passes through the supercharger cooler 203, the intercooler 205, and the brake cooler 204, is cooled by the low-temperature radiator 202, and then continues to circulate.
The specific implementation of the novel cooling system for the whole vehicle in the embodiment is as follows:
the first method is as follows: when the water temperature t of the system is less than the starting temperature t1 of the low-temperature thermostat, the system starts a small circulation mode. The two thermostats are closed, the warm air cooler, the engine oil cooler, the gearbox cooler loop and the small circulation loop participate in system cooling circulation, and cooling liquid does not flow through the high-temperature radiator, so that the engine can reach the optimal working temperature as soon as possible;
the second method comprises the following steps: when the low-temperature thermostat opening temperature t1 is less than the system water temperature t < the high-temperature thermostat opening temperature t2, the system starts a first large circulation mode: the cylinder cover, the warm air cooler, the engine oil cooler and the gearbox cooler loop participate in circulation, and the small circulation loop also participates in circulation;
the third method comprises the following steps: when the system water temperature t is higher than the high-temperature thermostat opening temperature t2, the system opens a second large circulation mode, the cylinder body, the cylinder cover, the warm air, the engine oil cooler and the gearbox cooler are all involved in circulation, and at the moment, the small circulation loop is closed.
The method is as follows: the low-temperature cooling system circulation loop independently circulates, the second water pump starts to work, cooling liquid passes through the supercharger cooler, the intercooler and the brake cooler and is cooled by the low-temperature radiator to continue circulating, and the low-temperature cooling circulation system can be normally cooled in a shutdown state.
In this embodiment, the first water pump 101 is a mechanical water pump, and the second water pump 201 is an electronic water pump. The second water pump adopts an electronic water pump, so that the coolant can be reasonably distributed no matter the engine is stopped or each component normally runs, the water temperature at the inlet of the heat dissipation part to be cooled is lower, the cooling effect is good, and the work is reliable.
In the embodiment, the high-temperature cooling circulation loop 100 and the low-temperature cooling circulation loop 200 share one expansion water tank 300, and the liquid supplementing ports of the expansion water tank 300 are respectively connected with a second water pump 201 and the first water pump 101 through a low-temperature thermostat 105, so as to supplement the high-temperature radiator 111, the cylinder water jacket 102 and the cylinder head water jacket 103 with the coolant at the water inlet of the first water pump 101 in the high-temperature cooling circulation loop 100 and supplement the coolant at the water inlet of the second water pump 201 in the low-temperature cooling circulation loop 200;
expansion tank 300 still connects first degasification pipeline and second degasification pipeline, first degasification pipeline includes first check valve 301, the one end of first check valve 301 is connected expansion tank 300, and the other end is connected high temperature radiator 111 department of intaking and cylinder cap water jacket 103 department of delivering water respectively, second degasification pipeline includes second check valve 302, the one end of second check valve 302 is connected expansion tank 300, and the other end is connected to low temperature radiator 202 department of intaking.
In the embodiment, the three branch expansion water tanks are arranged at the upstream of the water pump and are shared with high-temperature and low-temperature circulation, and continuous degassing can be performed after water is discharged from a cylinder cover and before water is introduced into a radiator when the thermostat is closed. And a certain pressure is defined on the water return side of the pump, so that the probability of cavitation erosion of the water pump at high temperature and high rotating speed can be reduced. When the machine is stopped, enough cooling liquid can be supplemented for the radiator and the water jacket at the water inlet of the water pump in the high-temperature circulating water path. And enough cooling liquid is supplemented at the water inlet of the electronic water pump in the low-temperature circulating water path.
It can be understood that the design standard of the traditional cooling system is to solve the heat dissipation problem in full load, so that the traditional passive cooling system has the problems of large volume, low cooling efficiency, increased power requirement of the cooling system, prolonged warm-up time of the engine and the like. While excessive heat dissipation at part load results in wasted engine power. It is even more evident for light vehicles, which most of the time run under partial load in urban areas, using only part of the engine power, causing higher losses in the cooling system.
The embodiment the novel cooling system of whole car in can be according to engine behavior adjustment cooling capacity, reduce engine power loss, in this cooling system, the system passes the thermal state of engine rapidly to electronic pump, realizes accurate control, improves fuel economy, reduces the emission, can also reduce the metal fatigue that circulation heat load caused simultaneously, extension part life.
While this specification contains many specific implementation details, these should not be construed as limitations on the scope of any inventions or of what may be claimed, but rather as descriptions of features that may embody particular implementations of particular inventions. Certain features that are described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Moreover, although features may be described above as acting in combination and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.
In certain situations, multitasking and parallel processing may be advantageous. Moreover, the separation of various system modules and components in the embodiments described above should not be understood as requiring such separation in all embodiments.
Particular embodiments of the subject matter have been described. Other embodiments are within the scope of the following claims. For example, the activities recited in the claims can be performed in a different order and still achieve desirable results. As one example, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In certain implementations, multitasking and parallel processing may be advantageous.

Claims (10)

1. The novel cooling system for the whole vehicle is characterized by comprising a high-temperature cooling circulation loop (100) and a low-temperature cooling circulation loop (200); the high-temperature cooling circulation circuit (100) comprises a first cooling circuit, a second cooling circuit, a first water pump (101), a cylinder body water jacket (102) and a cylinder cover water jacket (103) which are independent of each other, and an automatic temperature regulating valve, wherein inlets of the cylinder body water jacket (102) and the cylinder cover water jacket (103) are connected with a water outlet of the first water pump (101), the first cooling circuit and the second cooling circuit are connected in parallel and then are arranged between outlets of the cylinder cover water jacket (103) and the cylinder body water jacket (102) and a water return port of the first water pump (101), the automatic temperature regulating valve is arranged between the cylinder body water jacket (102) and the first cooling circuit, and the cylinder body water jacket (102) is controlled to be cooled by the first cooling circuit and/or the second cooling circuit when the temperature reaches a preset temperature;
the low-temperature cooling circulation loop (200) comprises a second water pump (201), and a component to be cooled and a low-temperature radiator (202) which are connected with the second water pump (201) in series, wherein the component to be cooled is used for cooling corresponding components in emergency shutdown or braking dangerous working conditions.
2. The new cooling system for whole vehicle as claimed in claim 1, wherein the thermostat valve comprises a high-temperature thermostat (104) and a low-temperature thermostat (105), and the opening temperature t2 of the high-temperature thermostat (104) is greater than the opening temperature t1 of the low-temperature thermostat (105); the high-temperature thermostat (104) is arranged between the cylinder water jacket (102) and the first cooling circuit; one end of the low-temperature thermostat (105) is connected with a water return port of the first water pump (101), and the other end of the low-temperature thermostat is connected with the second cooling loop; the high-temperature cooling circulation loop (100) further comprises a small circulation loop, the small circulation loop comprises a circulation pipeline (106), one end of the circulation pipeline (106) is connected with the low-temperature thermostat (105), and the other end of the circulation pipeline (106) is connected with a cylinder cover water jacket (103) and a high-temperature thermostat (104) respectively.
3. The novel cooling system for the whole vehicle as claimed in claim 2, wherein the components to be cooled comprise a supercharger cooler (203), a brake cooler (204) and an intercooler (205) which are connected in parallel, the outlet of the supercharger cooler (203), the outlet of the brake cooler (204) and the outlet of the intercooler (205) are connected with the low-temperature radiator (202), and the inlet of the supercharger cooler is connected with the water outlet of the second water pump (201).
4. A new cooling system for a whole vehicle according to claim 3, characterized in that the inlet of the brake cooler (204) is connected with the outlet of the second water pump (201) through a first throttle valve (206).
5. The novel cooling system for the whole vehicle as claimed in claim 2, wherein the first cooling circuit comprises an oil cooler (107), a fan heater (108) and a gearbox cooler (109) which are connected in parallel, outlets of the oil cooler (107), the fan heater (108) and the gearbox cooler (109) are connected with a water return port of a first water pump (101), and inlets of the oil cooler (107), the fan heater (108) and the gearbox cooler (109) are respectively connected with a high-temperature thermostat (104) and a cylinder cover water jacket (103);
the second cooling loop comprises a high-temperature radiator (111), an inlet of the high-temperature radiator (111) is respectively connected with the high-temperature thermostat (104) and the cylinder cover water jacket (103), and an outlet of the high-temperature radiator is connected with the low-temperature thermostat (105).
6. The novel cooling system for the whole vehicle as claimed in claim 5, characterized in that the inlet of the oil cooler (107) is connected with a second throttle valve (110) in series, and a series loop formed by the oil cooler (107) and the second throttle valve (110) is connected with the fan heater (108) in parallel.
7. The novel cooling system for the whole vehicle as claimed in claim 6, wherein the temperature of the cooling liquid in the novel cooling system for the whole vehicle is t, when t is less than t1, a small circulation mode is entered, in the small circulation mode, both the low-temperature thermostat (105) and the high-temperature thermostat (104) are closed, and the cooling liquid passes through the cylinder cover water jacket (103), and then returns to the first water pump (101) through the engine oil cooler (107), the fan heater (108), the gearbox cooler (109) and a small circulation loop to continue circulation;
when t1 is less than t < t2, a first large circulation mode is entered, in the first large circulation mode, a low-temperature thermostat (105) is opened, a high-temperature thermostat (104) is closed, after cooling liquid passes through a cylinder cover water jacket (103), a first part of cooling liquid returns to a first water pump (101) through a high-temperature radiator (111) to continue circulation, a second part of cooling liquid returns to the first water pump (101) through an engine oil cooler (107), a warm air blower (108) and a gearbox cooler (109) to continue circulation, and a third part of cooling liquid directly returns to the first water pump (101) through a small circulation loop to continue circulation;
and when t is greater than t2, a second major circulation mode is entered, in the second major circulation mode, both the low-temperature thermostat (105) and the high-temperature thermostat (104) are opened, a part of the cooling liquid returns to the first water pump (101) for continuous circulation after passing through the cylinder water jacket (102) and the high-temperature radiator (111), the other part of the cooling liquid returns to the first water pump (101) for continuous circulation after passing through the cylinder cover water jacket (103), the other part of the cooling liquid returns to the first water pump (101) for continuous circulation through the high-temperature radiator (111), and the rest of the cooling liquid returns to the first water pump (101) for continuous circulation after passing through the engine oil cooler (107), the warm air blower (108) and the gearbox cooler (109).
8. The novel cooling system for the whole vehicle as claimed in claim 3, wherein the low-temperature cooling circulation loop (200) performs independent circulation, the second water pump (201) starts to work, and the cooling liquid passes through the supercharger cooler (203), the intercooler (205) and the brake cooler (204), is cooled by the low-temperature radiator (202), and then continues to circulate.
9. The new cooling system of whole car of claim 1, characterized in that, the first water pump (101) is a mechanical water pump, and the second water pump (201) is an electronic water pump.
10. The novel cooling system for the whole vehicle as claimed in claim 3, wherein the high-temperature cooling circulation loop (100) and the low-temperature cooling circulation loop (200) share one expansion water tank (300), and liquid supplementing ports of the expansion water tank (300) are respectively connected with a second water pump (201) and the first water pump (101) through a low-temperature thermostat (105) and are used for supplementing cooling liquid to the high-temperature radiator (111), the cylinder water jacket (102) and the cylinder head water jacket (103) at the water inlet of the first water pump (101) in the high-temperature cooling circulation loop (100) and supplementing cooling liquid to the water inlet of the second water pump (201) in the low-temperature cooling circulation loop (200);
expansion tank (300) still connect first degasification pipeline and second degasification pipeline, first degasification pipeline includes first check valve (301), the one end of first check valve (301) is connected expansion tank (300), and high temperature radiator (111) department of intaking and cylinder head water jacket (103) department of delivering water are connected respectively to the other end, second degasification pipeline includes second check valve (302), the one end of second check valve (302) is connected expansion tank (300), and the other end is connected to low temperature radiator (202) department of intaking.
CN202210326835.0A 2022-03-30 2022-03-30 Novel cooling system of whole car Pending CN114575987A (en)

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CN202210326835.0A CN114575987A (en) 2022-03-30 2022-03-30 Novel cooling system of whole car

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Application Number Priority Date Filing Date Title
CN202210326835.0A CN114575987A (en) 2022-03-30 2022-03-30 Novel cooling system of whole car

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107401445A (en) * 2016-05-20 2017-11-28 宝沃汽车（中国）有限公司 Engine-cooling system and the vehicle with the engine-cooling system
CN112539106A (en) * 2020-12-04 2021-03-23 北京电子科技职业学院 Novel diesel engine cooling system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107401445A (en) * 2016-05-20 2017-11-28 宝沃汽车（中国）有限公司 Engine-cooling system and the vehicle with the engine-cooling system
CN112539106A (en) * 2020-12-04 2021-03-23 北京电子科技职业学院 Novel diesel engine cooling system

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Application publication date: 20220603