CN116357443A

CN116357443A - Automobile heat management system and automobile

Info

Publication number: CN116357443A
Application number: CN202310177852.7A
Authority: CN
Inventors: 张玲
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-06-30

Abstract

The invention relates to an automobile heat management system and an automobile, comprising a water pump forming a first circulating water path, an engine assembly and a cooling assembly, wherein the water pump is communicated with a water storage bottle, the engine assembly comprises a cylinder cover water jacket and a cylinder body water jacket, a water inlet of the cylinder cover water jacket and a water inlet of the cylinder body water jacket are both communicated with the water pump, a water outlet of the cylinder cover water jacket is communicated with the cooling assembly, the cooling assembly comprises an engine oil cooler and a transmission oil cooler which are arranged in parallel, a first temperature regulator is arranged between the engine assembly and the transmission oil cooler, the first temperature regulator is connected with the transmission oil cooler in series and is connected with the engine oil cooler in parallel, a second temperature regulator is arranged between the cylinder body water jacket and the cooling assembly in series and is connected with the cylinder cover water jacket in parallel, and the cylinder body water jacket is communicated with the cylinder cover water jacket. The invention evaporates the gasoline in the engine oil in a short time, and reduces the dilution degree of the engine oil or the emulsification degree of the engine oil.

Description

Automobile heat management system and automobile

Technical Field

The invention relates to the technical field of automobiles, in particular to the technical field of engines.

Background

Increasingly severe energy exhaustion and environmental pollution problems lead to increasingly strict automobile emission and oil consumption regulations by various governments, and direct injection engines and automatic transmissions in cylinders are widely adopted. The direct injection technology in the cylinder can improve the thermal efficiency of the engine, the fuel economy, the transient response and the uniformity of each cylinder. The disadvantage is that the problem of oil dilution and oil emulsification is more likely to occur. The engine oil has the functions of reducing the abrasion of precise parts in the engine, reducing the temperature of a cylinder body in the engine, preventing water, air, acidic substances and harmful gases from contacting with the parts by being adsorbed on the surfaces of the parts, preventing rust and corrosion, and cleaning, damping and buffering. After the oil is emulsified or diluted, the effect is reduced or the effect is disabled. Changing engine oil increases the cost of use for the consumer, and if not replaced in time, results in reduced engine life. The problems of oil emulsification and oil dilution often occur in cold winter, and in order to solve this problem, it is necessary to rapidly raise the engine temperature, and promote the evaporation of gasoline in the oil in a short time.

In the prior art, as shown in fig. 1, the water circulation is only provided with a small circulation loop and a large circulation loop, the large circulation loop is provided with a thermostat, and the small circulation loop is not provided with the thermostat, so that the cooling liquid pumped into the cylinder body water jacket by the water pump is cooled by the engine oil cooler and the transmission cooler under any engine water temperature condition, the engine temperature is slowly raised when the engine is started in a low-temperature environment, the gasoline in the engine oil is difficult to evaporate in a short time, and the problems of engine oil emulsification and engine oil dilution are easy to occur.

Disclosure of Invention

One of the purposes of the invention is to provide an automobile thermal management system to solve the problems of easy formation of oil emulsification and oil dilution in the prior art; the second purpose is to provide an automobile.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

the utility model provides an automobile thermal management system, includes the water pump that forms first circulation water route, engine subassembly and cooling module, water pump and retaining bottle intercommunication, engine subassembly includes cylinder cap water jacket and cylinder cap water jacket, the water inlet of cylinder cap water jacket and the water inlet of cylinder cap water jacket all communicate with the water pump, the delivery port and the cooling module intercommunication of cylinder cap water jacket, cooling module includes parallelly arranged oil cooler and derailleur oil cooler, be equipped with first thermosistor between engine subassembly and the derailleur oil cooler, first thermosistor is established ties with derailleur oil cooler and is connected in parallel with oil cooler, be equipped with the second thermosistor between cylinder cap water jacket and the cooling module, second thermosistor is established ties with cylinder cap water jacket and is connected in parallel with cylinder cap water jacket, cylinder cap water jacket and cylinder cap water jacket intercommunication, when the cooling water temperature in the engine reaches first temperature, first thermosistor is opened, otherwise closes, when the cooling water temperature in the engine reaches the second temperature, the second thermosistor is opened otherwise, the second temperature is greater than first temperature.

According to the technical means, when the water temperature of the engine is smaller than the first temperature, namely the engine is in an opened state to a state that the water temperature of the engine is close to the first temperature after the engine is started, at the moment, only a small amount of cooling water passes through the cylinder water jacket due to the closing of the first thermostat, the engine can quickly heat up, so that the gasoline in engine oil is evaporated in a short time, the problems of engine oil emulsification and engine oil dilution in winter are reduced or weakened, when the water temperature of the engine is between the first temperature and the second temperature, the first thermostat is opened, the second thermostat is closed, the cylinder water jacket is still not communicated with the cooling assembly, the engine continues to heat up, and the gasoline in the engine oil is further evaporated continuously, and meanwhile, the heating or cooling effects of the engine oil and the transmission oil are met; when the temperature of the water of the engine is higher than the second temperature, the temperature in the engine is higher, and the cylinder body water jacket is communicated with the cooling assembly, so that the effect of rapid heat dissipation is achieved.

Further, the water pump, the engine assembly, the third temperature regulator and the radiator form a second circulating water path, and when the difference value between the actual water temperature of the engine and the target water temperature of the engine is greater than 0, the third temperature regulator is started.

Further, when the water temperature difference between the actual water temperature of the engine and the target water temperature of the engine is gradually increased, the opening degree of the third temperature regulator is gradually increased.

Further, the opening of the third temperature regulator is obtained according to the water temperature difference value and the whole vehicle temperature limit value.

Further, the engine target water temperature is determined from an engine speed, an intake air temperature, and a vehicle speed.

Further, the cooling package also includes a warm air core in series with the transmission oil cooler, the warm air core being in parallel with the oil cooler.

Further, a first air passage is arranged between the water storage bottle and the radiator, so that air in the radiator can enter the water storage bottle through the first air passage.

Further, first regulator, second regulator and third regulator are all fixed on the regulator seat, engine subassembly can be through regulator seat and oil cooler, warm logical core and radiator intercommunication, be equipped with the second gas circuit between regulator seat and the retaining bottle for the gas in the fluid of passing through the regulator seat can get into in the retaining bottle through the second gas circuit.

Further, the cylinder head water jacket is communicated with the second air passage.

An automobile comprising the system.

The invention has the beneficial effects that:

the invention provides a device for quickly heating the engine in a low-temperature state after the engine is started by arranging a first temperature regulator and a second temperature regulator and controlling the opening or closing of the first temperature regulator and the second temperature regulator through the water temperature of the engine, so that the temperature of the engine is quickly raised, gasoline in engine oil is evaporated in a short time, and the dilution degree of the engine oil or the emulsification degree of the engine oil is reduced.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic diagram of the structure of the present invention, wherein the thick solid line represents the waterway and the thin dash-dot line represents the air channel;

FIG. 3 is a schematic diagram of water circulation operation when the engine water temperature does not reach the first temperature;

FIG. 4 is a schematic diagram of water circulation operation when the engine water temperature reaches a first temperature and does not reach a second temperature;

FIG. 5 is a schematic diagram of the water circulation operation when the engine water temperature reaches a second temperature;

fig. 6 is a schematic diagram of opening control of the third thermostat.

Wherein, 1-the water storage bottle; 2-an engine assembly; 21-a cylinder cover water jacket; 22-cylinder body water jacket; 3-a cooling assembly; 31-an oil cooler; 32-transmission oil cooler; 33-heating ventilation core; 4-a water pump; 5-a second attemperator; 6-a thermostat base; 7-a first thermostat; 8-a third thermostat; 9-a heat sink; 10-throttle valve; 11-a first air path; 12-a second gas path.

Detailed Description

Further advantages and effects of the present invention will become readily apparent to those skilled in the art from the disclosure herein, by referring to the following description of the embodiments of the present invention with reference to the accompanying drawings and preferred examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

The present embodiment proposes an automobile thermal management system, as shown in fig. 2, including a first circulation water path and a second circulation water path, wherein the first circulation water path is composed of a water pump 4, an engine assembly 2 and a cooling assembly 3, and the second circulation water path is composed of the water pump 4, the engine assembly 2, a third temperature regulator 8 and a radiator 9.

The water storage bottle 1 is used for supplementing liquid and maintaining pressure of the system, and the water pump 2 is used for providing power for the flow of the cooling liquid. The thermostat seat 6 is used for assembling and fixing the first thermostat 7, the second thermostat 5 and the third thermostat 8, and is internally provided with a water channel and an air channel, so that the thermostat seat has the function of communicating the water channel and the air channel. The first temperature regulator 7 and the second temperature regulator 5 are mechanical, the water temperature reaches a certain temperature, the temperature regulator is opened, the water circulation channel is opened, and the third temperature regulator 8 is electronic, so that the opening size of the water circulation channel and the water flow rate can be controlled.

The engine assembly 2 comprises a cylinder cover water jacket 21 and a cylinder body water jacket 22, wherein a water inlet of the cylinder cover water jacket 21 and a water inlet of the cylinder body water jacket 22 are communicated with the water pump 4, a water outlet of the cylinder cover water jacket 21 and a water outlet of the cylinder body water jacket 22 are communicated with the cooling assembly 3, the cooling assembly 3 comprises an engine oil cooler 31, a transmission oil cooler 32 and a heating ventilation core 33, and the transmission oil cooler 32 is connected in series with the heating ventilation core 33 and then connected in parallel with the engine oil cooler 31.

In this embodiment, the first thermostat 7 is provided between the engine assembly 2 and the transmission oil cooler 32, when the temperature of the cooling water in the engine reaches the first temperature, the first thermostat 7 is started, so that the engine assembly 2 is communicated with the transmission oil cooler 32, and when the temperature does not reach the first temperature, the first thermostat 7 is not started, and the engine assembly 2 is not communicated with the transmission oil cooler 32.

A second temperature regulator 5 is arranged between the cylinder water jacket 22 and the cooling assembly 3, the second temperature regulator 5 is connected in series with the cylinder water jacket 22 and is connected in parallel with the cylinder cover water jacket 21, when the cooling water temperature in the engine reaches a second temperature, the second temperature regulator 5 is opened so that the cylinder water jacket 22 is communicated with the cooling assembly 3, otherwise, if the second temperature is not reached, the cylinder water jacket 22 is not communicated with the cooling assembly 3, and the second temperature is higher than the first temperature.

Therefore, in winter or when the air temperature is low, if the engine is just started, that is, when the coolant temperature of the engine does not reach the first temperature, neither the first thermostat 7 nor the second thermostat 5 are started; when the temperature of the cooling liquid of the engine is more than or equal to the first temperature and less than the second temperature, the first temperature regulator 7 is started, and the second temperature regulator 5 is not started; that is, when the temperature of the coolant of the engine is equal to or higher than the second temperature, both the first thermostat 7 and the second thermostat 5 are activated. The first temperature and the second temperature in this example were 50℃and 100℃respectively.

In winter or when the temperature is low, when the engine is just started, the circulation mode of the cooling liquid is shown in fig. 3, the cooling liquid flows out of the water storage bottle 1 and then enters the water pump 4, then flows through the water pump 4, the cylinder cover water jacket 21 and the engine oil cooler 31, only a small amount of water flow flows from the cylinder body water jacket 4 to the cylinder cover water jacket 21 in the circulation, the water flow in the cylinder body water jacket 22 is low, and the rapid temperature rise in the engine cylinder body is facilitated.

When the temperature of the engine cooling liquid reaches 50 ℃, the flow mode of the cooling liquid is shown in fig. 4, the cooling liquid flows through the cylinder cover water jacket 21, the engine oil cooler 31, the warm air core 33 and the transmission oil cooler 32, the system meets the heating or cooling functions of engine oil and transmission oil, meanwhile, the heating requirement of a member cabin is met, a small amount of cooling liquid flows from the cylinder body water jacket 22 to the cylinder cover water jacket 21, the water flow rate in the cylinder body water jacket 22 is low, and the engine cylinder body can be heated continuously.

The cooling water temperature of the engine is increased to 100 ℃, referring to fig. 4, the gasoline in the engine oil is completely evaporated, and after the cooling liquid flows out of the water storage bottle 1, the cooling liquid flows through the cylinder cover water jacket 21, the cylinder body water jacket 22, the engine oil cooler 31, the transmission oil cooler 32 and the heating ventilation core 33, the cooling liquid flow of the cylinder body water jacket 4 is increased, the cooling is facilitated, and the system realizes the operation of a complete engine circulation loop.

The system also comprises a first air passage 11 and a second air passage 12, wherein the first air passage 11 is arranged between the water storage bottle 4 and the radiator 9, the inlet of the first air passage 11 is communicated with the radiator 9, the outlet is communicated with the water storage bottle 4, when cooling water passing through the third temperature regulator 8 passes through the radiator 9, gas is reserved in the device under the condition of filling cooling liquid or high water temperature, and the air passage can better separate the gas from the circulation loop, and the gas enters the water storage bottle through the first air passage 11. The throttle valve 10 is arranged on the first air passage 11, and a small amount of water and air in the first air passage 11 can be separated by adjusting the opening of the throttle valve 10, so that air can be timely discharged after entering the water storage bottle 1.

The inlet of the second air channel 12 is communicated with the thermostat seat 6, the outlet is communicated with the water storage bottle 1, so that the gas of the cooling water passing through the thermostat seat 6 can flow into the water storage bottle 1 and be discharged in time, and meanwhile, the cylinder cover water jacket 21 is communicated with the second air channel 12, so that the gas of the cylinder cover water jacket 21 can be discharged into the water storage bottle 1 in time.

Referring to a control diagram of the temperature regulator 13 in fig. 5, an engine target water temperature in a whole vehicle running state is determined through an engine speed, an engine load, an air inlet temperature and a vehicle speed, an engine water temperature difference is obtained through calculation of the engine target water temperature and an engine actual water temperature, and the opening degree of the third temperature regulator 8 is obtained according to the engine water temperature difference and a whole vehicle temperature limit value, wherein the opening degree is different, the water flow rate through the radiator 9 is different, and the heat dissipation capacity is also different. For example, the speed of the whole vehicle is 100km/h, the engine speed is 3200 revolutions, the engine load is 80%, the air inlet temperature is 45 ℃, the temperature of the air inlet is 105 ℃ through the first target water temperature which can be checked, the temperature of the air inlet is 104.3 ℃ through the second target water temperature which can be checked, the temperature of the air inlet is 105 ℃ through the second target water temperature which can be checked, the values of the three tables are small, at the moment, the target water temperature 24 of the engine is 104.3 ℃, when the actual water temperature 25 and the target water temperature 24 of the engine are larger than 0, the temperature regulator 13 starts to be started, and the amplitude of the temperature regulator 13 starts to be gradually increased according to the size of the water temperature difference 26. Thereby realizing the increase of water quantity and accelerating heat dissipation. The temperature limit 27 may be based on other component temperature limits, such as: the opening degree of the thermostat 13 is determined based on a limit value such as an automatic transmission oil temperature and an engine oil temperature.

Remarks: the values of the first table, the second table and the third table can be calibrated according to different engine characteristics. The temperature regulator 5 and the temperature regulator 10 are mechanical temperature regulators, namely, the fixed temperature is opened, the electronic thermostat can be arranged subsequently, the real-time control is performed, the water pump 2 is mechanically driven and is only influenced by the rotation speed of the engine, and the electronic water pump can be replaced subsequently according to the project requirement, so that the flow real-time control is performed.

List one

Watch II

Watch III

The embodiment also provides an automobile provided with the system.

The above embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention.

Claims

1. The utility model provides an automobile thermal management system, includes water pump (4) that forms first circulation water route, engine subassembly (2) and cooling module (3), water pump (4) and retaining bottle (1) intercommunication, engine subassembly (2) include cylinder cap water jacket (21) and cylinder body water jacket (22), the water inlet of cylinder cap water jacket (21) and the water inlet of cylinder body water jacket (22) all communicate with water pump (4), the delivery port and the cooling module (3) intercommunication of cylinder cap water jacket (21), cooling module (3) include oil cooler (31) and derailleur oil cooler (32) of parallelly connected arrangement, its characterized in that: the engine assembly (2) is provided with a first temperature regulator (7) between the engine assembly and a transmission oil cooler (32), the first temperature regulator (7) is connected with the transmission oil cooler (32) in series and is connected with an engine oil cooler (31) in parallel, a second temperature regulator (5) is arranged between the cylinder body water jacket (22) and the cooling assembly (3), the second temperature regulator (5) is connected with the cylinder body water jacket (22) in series and is connected with the cylinder cover water jacket (21) in parallel, the cylinder body water jacket (22) is communicated with the cylinder cover water jacket (21), when the cooling water temperature in the engine reaches a first temperature, the first temperature regulator (7) is opened, otherwise, the first temperature regulator is closed, when the cooling water temperature in the engine reaches a second temperature, the second temperature regulator (5) is opened, otherwise, the second temperature is higher than the first temperature.

2. The system according to claim 1, wherein: the water pump (4), the engine assembly (2), the third temperature regulator (8) and the radiator (9) form a second circulating water path, and when the difference value between the actual water temperature of the engine and the target water temperature of the engine is greater than 0, the third temperature regulator (8) is started.

3. The system according to claim 2, wherein: when the water temperature difference between the actual water temperature of the engine and the target water temperature of the engine is gradually increased, the opening degree of the third temperature regulator (8) is gradually increased.

4. A system according to claim 3, characterized in that: and the opening degree of the third temperature regulator (8) is obtained according to the water temperature difference value and the whole vehicle temperature limit value.

5. A system according to claim 3, characterized in that: the engine target water temperature is determined from an engine speed, an intake air temperature, and a vehicle speed.

6. The system according to claim 1, wherein: the cooling assembly (3) further comprises a warm ventilation core (33) in series with the transmission oil cooler (32).

7. A system according to claim 3, characterized in that: a first air passage (11) is arranged between the water storage bottle (1) and the radiator (9), so that air in the radiator (9) can enter the water storage bottle (1) through the first air passage (11).

8. The system according to claim 2, wherein: the first temperature regulator (7), the second temperature regulator (5) and the third temperature regulator (8) are all fixed on the temperature regulator seat (6), the engine assembly (2) can be communicated with the engine oil cooler (31), the heating ventilation core (33) and the radiator (9) through the temperature regulator seat (6), a second air passage (12) is arranged between the temperature regulator seat (6) and the water storage bottle (1), and gas in fluid passing through the temperature regulator seat (6) can enter the water storage bottle (1) through the second air passage (12).

9. The system according to claim 8, wherein: the cylinder cover water jacket (21) is communicated with the second air passage (12).

10. An automobile, characterized in that: comprising the system of any one of claims 1-9.