CN105756764B - A kind of engine-cooling system - Google Patents

Abstract

The invention provides an engine cooling system, which relates to the field of automobile structure, including a power pump, a thermostat, a radiator and a coolant storage device. A temperature control valve is arranged inside the thermostat, and the inner cavity of the thermostat is divided into independent The first cavity and the second cavity of the engine body, the first cavity, and the power pump are connected in sequence, and the power pump is also connected with the engine to form a first circulation path for coolant circulation, and the second cavity is connected with the heat dissipation The devices communicate with each other through the first pipe and the second pipe respectively to form a second circulation passage for cooling liquid circulation, and the cooling liquid storage device communicates with the second circulation passage through the replenishment pipe. When the engine body starts to warm up, the coolant storage device communicates with the second circulation passage instead of the engine body, and only needs to heat up the coolant circulating inside the engine body without cooling the coolant in the coolant storage device. Warm up, greatly shorten the warm-up time, reduce engine fuel consumption and exhaust emissions.

Description

an engine cooling system

technical field

The invention relates to the field of automobile structure, in particular to an engine cooling system.

Background technique

The engine cooling system is a device that removes the heat absorbed by the high-temperature parts of the car engine in time to keep them working within a normal temperature range.

In the existing cooling system, the coolant absorbs the heat of the engine body and the temperature rises, and then flows into the radiator. A temperature control valve is installed inside the thermostat. When the temperature of the coolant is high enough, the temperature control valve opens to allow the coolant to flow To the radiator radiator, the cooled coolant flows back to the thermostat and the engine body, thereby continuously circulating, and the coolant storage device directly replenishes the coolant to the engine body through the liquid replenishment pipe; when the engine starts to warm up , the coolant temperature is low, so that the temperature control valve is closed, therefore, the coolant in the coolant storage device only participates in the internal circulation of the engine body.

Therefore, it is necessary to heat up the coolant circulating inside the engine body and the coolant in the coolant storage device at the same time to realize the engine start-up and warm-up, which leads to a long warm-up time and greatly increases fuel consumption and exhaust emissions.

Contents of the invention

In order to solve the above-mentioned technical problems, the present invention provides an engine cooling system, which can realize engine start-up and warm-up only by raising the temperature of the coolant circulated inside the engine body without raising the temperature of the coolant in the coolant storage device, greatly shortening the temperature of the engine. machine time, reducing fuel consumption and exhaust emissions.

The invention provides an engine cooling system, including a power pump, a thermostat, a radiator and a coolant storage device. A temperature control valve is arranged inside the thermostat, and the inner cavity of the thermostat is divided into an independent first cavity. body and the second cavity, the engine body, the first cavity, and the power pump communicate in sequence, and the power pump is also communicated with the engine to form a first circulation passage for coolant circulation, the The second cavity communicates with the radiator through the first pipe and the second pipe respectively to form a second circulation passage for cooling liquid circulation, and the cooling liquid storage device communicates with the second circulation passage through a liquid replenishment pipe connected; when the engine body starts to warm up, the temperature control valve is closed.

Specifically, both ends of the first pipe are respectively connected with the liquid outlet of the radiator and the liquid inlet of the second cavity, and the two ends of the second pipe are respectively connected with the liquid inlet of the radiator. , the liquid outlet of the second cavity communicates.

Further, the liquid replenishment tube communicates with the first pipeline.

Preferably, the liquid replenishment tube communicates with the second cavity.

Specifically, the engine cooling system further includes an engine air outlet pipe, and both ends of the engine air outlet pipe communicate with the coolant storage device and the first circulation passage respectively.

Preferably, both ends of the engine outlet pipe communicate with the coolant storage device and the first cavity respectively.

Further, the engine cooling system further includes an engine air outlet pipe, and both ends of the engine air outlet pipe communicate with the coolant storage device and the second circulation passage respectively.

Preferably, both ends of the engine outlet pipe communicate with the coolant storage device and the second cavity respectively.

Further, the engine cooling system further includes a radiator air outlet pipe, both ends of the radiator air outlet pipe communicate with the coolant storage device and the air outlet of the radiator respectively.

Further, the cooling liquid is water, and the cooling liquid storage device is an expansion tank.

The invention provides an engine cooling system. When the engine body starts to warm up, the temperature control valve is closed, the first cavity and the second cavity of the thermostat are not communicated with each other, and the coolant storage device and the second circulation passage It is not connected with the engine body, therefore, it is only necessary to heat up the coolant circulating inside the engine body, and there is no need to heat up the coolant in the coolant storage device, thereby greatly shortening the warm-up time, reducing engine fuel consumption and exhaust emissions quantity.

Those skilled in the art will be more aware of the above and other objects, advantages and features of the present invention according to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of illustration and not limitation with reference to the accompanying drawings. The same reference numerals in the drawings designate the same or similar parts or parts. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the attached picture:

Fig. 1 is a schematic structural diagram of an engine cooling system according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of an engine cooling system according to yet another embodiment of the present invention.

The meanings of the symbols in the figure are as follows:

1 engine body, 11 engine outlet pipe,

2 power pumps,

3 thermostats, 31 first cavity, 32 second cavity,

4 radiators, 41 radiator outlet pipes,

5 coolant storage device, 51 replenishment pipe,

6 the first pipe,

7 Second pipeline.

Detailed ways

The invention provides an engine cooling system, which can realize engine start-up and warm-up only by raising the temperature of the coolant circulated inside the engine body without raising the temperature of the coolant in the coolant storage device, greatly shortening the warm-up time, reducing fuel consumption and Exhaust emissions.

Fig. 1 is a schematic structural diagram of an engine cooling system according to an embodiment of the present invention. As shown in Figure 1, the present invention provides an engine cooling system, including a power pump 2, a thermostat 3, a radiator 4, and a coolant storage device 5. A temperature control valve is arranged inside the thermostat 3 to control the temperature The internal cavity of the device 3 is divided into an independent first cavity 31 and a second cavity 32, the engine body 1, the first cavity 31, and the power pump 2 are connected in sequence, and the power pump 2 is also connected to the The engine communicates to form a first circulation passage for coolant circulation, and the second cavity 32 communicates with the radiator 4 through the first pipe 6 and the second pipe 7 respectively to form a coolant circulation passage. The coolant storage device 5 communicates with the second circulation path through a liquid replenishment pipe 51 ; when the engine body 1 starts to warm up, the temperature control valve is closed.

Wherein, the temperature control valve is the prior art, and only when the temperature of the coolant therein reaches a preset height, the temperature control valve will automatically open, so that the first cavity 31 and the second cavity 32 are communicated; in the second circulation path Among them, the two ends of the first pipeline 6 and the two ends of the second pipeline 7 are connected with the second cavity 32 and the radiator 4 respectively, so that the second cavity 32, the radiator 4, the first pipeline 6, the second The pipes 7 communicate with each other to form a second circulation passage for the cooling liquid to circulate.

The present invention provides an engine cooling system. When the engine body 1 starts to warm up, the temperature control valve is closed, and the first cavity 31 and the second cavity 32 of the thermostat 3 are not communicated with each other, that is, the first circulation path It is not connected with the second circulation passage, and the coolant storage device 5 communicates with the second circulation passage, so the coolant storage device 5 at this time is responsible for supplying the coolant only to the second circulation passage, rather than to the engine body 1 Therefore, when the engine body 1 starts to warm up, it is only necessary to heat up the coolant circulated inside the engine body 1, that is, the coolant in the first circulation path is heated up without cooling the coolant in the coolant storage device 5. The warm-up time can be greatly shortened, and the warm-up time can be reduced from 600S to 400S, reducing engine fuel consumption and exhaust emissions; only when the temperature of the coolant in the first circulation path reaches the preset height, the temperature control valve will automatically Open, so that the first cavity 31 and the second cavity 32 communicate, the coolant in the first circulation path will flow into the radiator 4 in the second circulation path to cool down and dissipate heat, and then the coolant will flow back through the first cavity 31 To the engine body 1, the next round of cooling of the engine body 1 is carried out; the present invention has simple structure, low cost and convenient use.

Specifically, as shown in FIG. 1 , in this embodiment, both ends of the first pipe 6 communicate with the liquid outlet of the radiator 4 and the liquid inlet of the second cavity 32 respectively. Both ends of the two pipes 7 communicate with the liquid inlet of the radiator 4 and the liquid outlet of the second cavity 32 respectively.

Further, as shown in FIG. 1 , in this embodiment, the liquid replenishment pipe 51 communicates with the first pipeline 6 . The preferred connection mode of the liquid replenishment pipe 51 is to communicate with the first pipe 6. Since the temperature of the coolant in the coolant storage device 5 itself is relatively low, it can directly enter the engine body 1 from the second cavity 32 and the first cavity 31 for further maintenance. Cool down without entering the radiator 4, thereby saving time and improving efficiency.

Preferably, the liquid replenishment tube 51 communicates with the second cavity 32 . Of course, those skilled in the art know that the liquid replenishment pipe 51 can be connected to any position in the second circulation path, and can participate in the heat dissipation cycle, and at the same time, when the engine body 1 starts to warm up, it does not participate in the circulation in the first circulation path. There is no need to heat up the cooling liquid in the cooling liquid storage device 5 .

Specifically, as shown in FIG. 1 , in this embodiment, the engine cooling system further includes an engine outlet pipe 11, and both ends of the engine outlet pipe 11 are respectively connected to the coolant storage device 5 and the first circulation passage. connected. Preferably, both ends of the engine outlet pipe 11 communicate with the coolant storage device 5 and the first cavity 31 respectively. The engine outlet pipe 11 communicates with the coolant storage device 5, the purpose is that when the engine body 1 generates gas, it can be discharged from the coolant storage device 5 to the atmosphere in time, and in this way, two circulation paths pass through the coolant storage device 5 It communicates with the external atmosphere, and in the case of pressure communication, it is beneficial for new coolant to enter the circulation.

Fig. 2 is a schematic structural diagram of an engine cooling system according to yet another embodiment of the present invention. As shown in FIG. 2 , further, the engine cooling system further includes an engine outlet pipe 11 , and both ends of the engine outlet pipe 11 communicate with the coolant storage device 5 and the second circulation passage respectively. Preferably, both ends of the engine outlet pipe 11 communicate with the coolant storage device 5 and the second cavity 32 respectively.

The purpose of this arrangement is that when the gas is generated inside the engine body 1, it can be discharged from the coolant storage device 5 to the atmosphere in time, and, in this way, the two circulation passages communicate with the outside atmosphere through the coolant storage device 5, and the two circulation passages communicate with each other in pressure. Under normal circumstances, it is beneficial for new coolant to enter the circulation; in addition, the engine outlet pipe 11 is not communicated with the first circulation passage, that is, when the engine body 1 starts to warm up, the first circulation passage cannot release gas to the outside, that is, it is connected to the outside. If the pressure is not communicated, the new coolant will not enter the first circulation path, thereby ensuring that when the engine body 1 starts to warm up, only the original coolant in the first circulation path needs to be heated, and the heating rate is relatively high; the engine outlet pipe 11 can also be Connected to other positions in the second circulation path, such as communicating with the second pipeline 7 and so on.

Further, as shown in FIG. 2 , also referring to FIG. 1 , the engine cooling system also includes an air outlet pipe 41 of the radiator 4 , and both ends of the air outlet pipe 41 of the radiator are respectively connected to the coolant storage device 5 , the The air outlet of radiator 4 communicates. The gas generated in the radiator 4 can be discharged into the atmosphere through the radiator outlet pipe 41 to the coolant storage device 5 to ensure smooth circulation of the coolant.

Further, as shown in FIG. 2 , and also referring to FIG. 1 , the cooling liquid is water, and the cooling liquid storage device 5 is an expansion tank. Power pump 2 can adopt water pump.

To sum up, when the engine body 1 is cold started, due to the low temperature of the coolant, the temperature control valve inside the thermostat 3 is closed, and the coolant circulates in the first circulation path; after the temperature of the coolant rises, the temperature control valve of the thermostat 3 is opened (The opening temperature is generally about 85°), the coolant flows to the radiator 4 through the thermostat 3, and after the radiator 4 is cooled by the fan, the coolant flows back to the engine body 1; during the working process, the air bubbles in the cooling system It flows to the expansion tank through the engine outlet pipe 11 and the radiator outlet pipe 41. When the pressure of the expansion tank reaches a certain value (opening pressure is about 110kPa), the valve is opened and discharged to the atmosphere; the coolant will be consumed to a certain extent as the engine works. , when a certain amount is consumed (close to the minimum warning line of the expansion tank, the highest shall not exceed 2\3 of the height of the expansion tank, and the minimum shall not be lower than 1\3 of the height of the expansion tank), the coolant will be replenished at the expansion tube; In the embodiment of the invention, after the position of the liquid replenishment pipe 51 is adjusted, the water intake of the engine water pump is reduced, and at high engine (water pump) speed, the pressure in front of the pump will decrease, and there is a risk of cavitation at the water pump; At 5500rpm, the 51 scheme of the liquid replenishment pipe can keep the pressure in front of the pump higher than 40kPa, which has a margin of 30kPa compared with the pump cavitation pressure of 10kPa, which can avoid the risk of pump cavitation.”

So far, those skilled in the art should appreciate that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, without departing from the spirit and scope of the present invention, the disclosed embodiments of the present invention can still be used. Many other variations or modifications consistent with the principles of the invention are directly identified or derived from the content. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (9)

1. a kind of engine-cooling system, including kinetic pump, thermostat, radiator and coolant liquid storage device, which is characterized in that Thermostat valve is set inside the thermostat, thermostat internal cavity is divided into independent first cavity and the second cavity, engine Ontology, first cavity, the kinetic pump are sequentially communicated, and the kinetic pump is also connected to the engine, and formation is used for The first circulation access of coolant liquid circulation, is managed by first pipe and second respectively between second cavity and the radiator Road is connected to, and forms the second circulation access for coolant liquid circulation, and the coolant liquid storage device passes through liquid supplementation pipe and described the Two circulation paths are connected to；

When the engine body starts warming-up, the thermostat valve is closed；

The first pipe both ends are connected to the inlet of the liquid outlet of the radiator, second cavity respectively, and described Two pipe ends are connected to the liquid outlet of the inlet of the radiator, second cavity respectively.

2. engine-cooling system according to claim 1, which is characterized in that the liquid supplementation pipe connects with the first pipe It is logical.

3. engine-cooling system according to claim 1, which is characterized in that the liquid supplementation pipe connects with second cavity It is logical.

4. engine-cooling system according to claim 2 or 3, which is characterized in that the engine-cooling system also wraps Include engine escape pipe, engine escape pipe both ends respectively with the coolant liquid storage device, the first circulation access Connection.

5. engine-cooling system according to claim 4, which is characterized in that engine escape pipe both ends respectively with The coolant liquid storage device, first cavity connection.

6. engine-cooling system according to claim 5, which is characterized in that the engine-cooling system further includes hair Motivation escape pipe, engine escape pipe both ends are connected to the coolant liquid storage device, the second circulation access respectively.

7. engine-cooling system according to claim 6, which is characterized in that engine escape pipe both ends respectively with The coolant liquid storage device, second cavity connection.

8. engine-cooling system according to claim 1, which is characterized in that the engine-cooling system further includes dissipating Hot device escape pipe, radiator escape pipe both ends connect with the gas outlet of the coolant liquid storage device, the radiator respectively It is logical.

9. engine-cooling system according to claim 1, which is characterized in that the coolant liquid is water, and the cooling Liquid storage device is expansion drum.