Engine cooling system

Abstract

The application discloses an engine cooling system, which comprises a water pump, an engine cooling water circuit, an electronic temperature regulator, a radiator and a cylinder body valve; the outlet of the water pump is communicated with the inlet of the cylinder head; the electronic temperature regulator has an inlet cavity and a distribution cavity; the inlet cavity has an inlet I communicated with the outlet of the cylinder head and an outlet I communicated with the inlet of the radiator; the distribution cavity has an inlet II communicated with the outlet of the radiator and an outlet II communicated with the inlet of the water pump; the distribution cavity and the inlet cavity are communicated through a liquid passing hole, a plug is arranged in the distribution cavity, the plug is controlled to communicate the liquid passing hole and the inlet II, or the plug is controlled to block the liquid passing hole or the inlet II; the cylinder body valve is arranged on a channel communicated with the cylinder body cooling channel and the inlet cavity; the engine cooling system can optimize the current radiator arrangement, solve the problem of severe water jacket temperature oscillation and reduce the structural arrangement difficulty.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engine cooling, in particular to an engine cooling system. BACKGROUND

[0002] The current engine cooling system arrangement, the thermostat is generally located in front of the radiator or behind the radiator, the front of the radiator arrangement in the warm working condition with the increase of temperature exists water jacket temperature oscillation severe drawbacks, affect the engine performance, but the radiator behind the arrangement of thermostat, generally arranged in front of the water pump integrated water pump design, although avoid or reduce the water jacket temperature oscillation severe shortcomings, but the structure is more complex to achieve the purpose, in the limited space there are difficulties in arrangement defects.

[0003] Therefore, in order to solve the above problems, the need for an engine cooling system, can optimize the current radiator behind the arrangement of thermostat of engine cooling system, solve the water jacket temperature oscillation severe problem at the same time, reduce the difficulty of structure arrangement. SUMMARY

[0004] Therefore, the purpose of the present application is to overcome the defects in the prior art, provide an engine cooling system, can optimize the current radiator behind the arrangement of thermostat of engine cooling system, solve the water jacket temperature oscillation severe problem at the same time, reduce the difficulty of structure arrangement.

[0005] The engine cooling system of the present application comprises a water pump, an engine cooling water circuit, an electronic thermostat, a radiator and a cylinder body valve.

[0006] The engine cooling water circuit comprises a cylinder head front section cooling channel, a cylinder body cooling channel and a cylinder head rear section cooling channel, the cylinder body cooling channel communicates the cylinder head front section cooling channel and the cylinder head rear section cooling channel, the cylinder head front section cooling channel has a cylinder head liquid inlet, and the cylinder head rear section cooling channel has a cylinder head liquid outlet.

[0007] The liquid outlet of the water pump is communicated to the cylinder head liquid inlet, so that the cooling liquid is pumped to the engine cooling water circuit by the water pump through the cylinder head liquid inlet.

[0008] The electronic thermostat has a liquid inlet cavity and a liquid distribution cavity.

[0009] The liquid inlet cavity has a liquid inlet I communicated with the cylinder head liquid outlet, and the liquid inlet cavity further has a liquid outlet I communicated with the radiator liquid inlet.

[0010] The liquid distribution cavity has a liquid inlet II communicated with the radiator liquid outlet, and the liquid distribution cavity further has a liquid outlet II communicated with the water pump liquid inlet.

[0011] The liquid distribution chamber and the liquid inlet chamber are communicated through a liquid passing hole, a plug is arranged in the liquid distribution chamber, the plug is controlled to communicate the liquid passing hole and the liquid inlet II, or the plug is controlled to block the liquid passing hole or the liquid inlet II;

[0012] The cylinder cooling channel is further communicated to the liquid inlet chamber, and the cylinder valve is arranged on a channel communicated between the cylinder cooling channel and the liquid inlet chamber, and the cylinder valve is controlled to communicate or disconnect the cylinder cooling channel and the liquid inlet chamber.

[0013] Further, the engine cooling system further comprises an oil cooler, a water inlet end of the oil cooler is communicated to the water outlet of the water pump, and a water outlet end of the oil cooler is communicated to the water inlet of the water pump.

[0014] Further, the engine cooling system further comprises a turbocharger, a water inlet end of the turbocharger is communicated to the water outlet of the water pump, and a water outlet end of the turbocharger is communicated to the water inlet of the water pump.

[0015] Further, the engine cooling system further comprises a heater core, a water inlet end of the heater core is communicated to a hot end of the engine cooling water circuit, and a water outlet end of the heater core is communicated to the liquid inlet I of the liquid inlet chamber.

[0016] Further, the engine cooling system further comprises a temperature monitoring device for monitoring the water outlet temperature of the engine cooling water circuit, and the temperature monitoring device is arranged at the water outlet end of the engine cooling water circuit.

[0017] Further, the cylinder valve is a wax type thermostat.

[0018] Further, the engine cooling system further comprises an expansion water tank, and the engine cooling water circuit is further communicated to the water inlet of the water pump through the expansion water tank.

[0019] Further, the radiator is further communicated to the water inlet of the water pump through the expansion water tank.

[0020] Further, the engine cooling system further comprises an EGR cooler, a water inlet end of the EGR cooler is communicated to the water outlet of the water pump, and a water outlet end of the EGR cooler is communicated to the liquid inlet I of the liquid inlet chamber.

[0021] Further, the EGR cooler is further communicated to the water inlet of the water pump through the expansion water tank.

[0022] The engine cooling system has the advantages that: the electronic thermostat is arranged between the water outlet end of the engine cooling water circuit and the radiator, so that the structure design is more compact, the structure layout in the given space is facilitated, the difficulty of structure arrangement of the cooling system is reduced, and the defect of severe water jacket temperature oscillation is solved.

[0023] In the small cycle condition, the medium flows as follows:

[0024] a. the temperature in the cylinder cooling channel is lower than 70℃;

[0025] Water pump→Engine cooling water path→Cylinder valve is closed, the electronic thermostat regulating plug seals the inlet II, and the radiator has no cooling liquid flow→Water pump;

[0026] b. the temperature in the cylinder cooling channel is higher than 70℃;

[0027] Water pump→Engine cooling water path→Cylinder valve is opened, the electronic thermostat regulating plug seals the liquid hole, and the radiator has cooling liquid flow→Water pump;

[0028] The medium flow direction in the large circulation working condition is as follows:

[0029] Water pump→Engine cooling water path→Cylinder valve is opened, the electronic thermostat regulating plug seals the liquid hole, and the radiator has cooling liquid flow→Water pump;

[0030] When the large and small circulation is opened, only the electronic thermostat regulating plug is needed to connect the liquid hole and the inlet II, and the medium flow direction is the medium flow direction of the small circulation and the large circulation. BRIEF DESCRIPTION OF DRAWINGS

[0031] The application will be further described below in combination with the drawings and embodiments:

[0032] Figure 1 It is a structural schematic diagram of the large circulation of the application;

[0033] Figure 2 It is a structural schematic diagram of the small circulation of the application. DETAILED DESCRIPTION

[0034] Figure 1 It is a structural schematic diagram of the application, as shown in the figure, the engine cooling system in the embodiment includes a water pump, an engine cooling water path, an electronic thermostat, a radiator and a cylinder valve;

[0035] The engine cooling water path includes a cylinder head front section cooling channel, a cylinder body cooling channel and a cylinder head rear section cooling channel, the cylinder body cooling channel connects the cylinder head front section cooling channel and the cylinder head rear section cooling channel, the cylinder head front section cooling channel has a cylinder head inlet, and the cylinder head rear section cooling channel has a cylinder head outlet;

[0036] In the scheme, the engine cooling water path includes a cylinder water jacket and a cylinder head water jacket connected, the medium flow direction is that water enters the cylinder water jacket from the cylinder head water jacket inlet, then water enters the cylinder head water jacket from the cylinder body water jacket, and then water flows from the cylinder head water jacket outlet to a preset position, the structure of the cylinder water jacket and the structure of the cylinder head water jacket are arranged according to the actual situation, which will not be described here;

[0037] The outlet of the water pump is communicated with the inlet of the cylinder head, so that the coolant is pumped by the water pump to the engine cooling water circuit through the inlet of the cylinder head; the water pump is selected from any one of the prior art, which is used to pump the cooling medium to the designated position, and will not be described here;

[0038] The electronic temperature regulator has an inlet chamber and a distribution chamber;

[0039] The inlet chamber has an inlet I communicated with the outlet of the cylinder head, and also has an outlet I communicated with the inlet of the radiator;

[0040] The distribution chamber has an inlet II communicated with the outlet of the radiator, and also has an outlet II communicated with the inlet of the water pump;

[0041] The distribution chamber and the inlet chamber are communicated through a liquid passage, and a plug is arranged in the distribution chamber, which is controlled to communicate the liquid passage and the inlet II, or the plug is controlled to block the liquid passage or the inlet II;

[0042] In this scheme, the electronic temperature regulator is selected from any one of the prior art with the above structure, and the unexplained part is consistent with the prior art, which will not be described here;

[0043] The cylinder body cooling channel is also communicated with the inlet chamber, and the cylinder body valve is arranged on the channel communicated with the inlet chamber, and is controlled to communicate or disconnect the cylinder body cooling channel and the inlet chamber; the cylinder body valve is a wax type temperature regulator, and in this scheme, the wax type temperature regulator is selected from any one of the prior art, which will not be described here; the open circuit critical temperature of the wax type temperature regulator is set to 70℃, when the temperature is higher than 70℃, the wax type temperature regulator is in the open circuit state, the cylinder body cooling channel and the inlet chamber are communicated, and when the temperature is lower than 70℃, the wax type temperature regulator is in the open circuit state, the cylinder body cooling channel and the inlet chamber are disconnected, so that the cylinder body cooling channel automatically injects or is cut off by the wax type temperature regulator through the change of the open circuit of the wax type temperature regulator with the change of the water circuit temperature.

[0044] In this scheme, the electronic temperature regulator is arranged between the outlet of the engine cooling water circuit and the radiator, so that the structure design can be more compact, which is beneficial to the structural layout in the given space, reduces the difficulty of structural arrangement of the cooling system, the high temperature oscillation difference can be controlled in a smaller range, the defect of violent temperature oscillation of the water jacket is solved, and the performance of the engine is effectively improved.

[0045] Among them, the medium flow direction under the small cycle working condition is as follows:

[0046] a. The temperature in the cylinder body cooling channel is lower than 70℃;

[0047] Water pump→Engine cooling water circuit→Cylinder valve closed, electronic thermostat regulating plug blocks the inlet II, radiator no cooling liquid flow→Water pump;

[0048] b. The temperature in the cylinder cooling channel is higher than 70℃;

[0049] Water pump→Engine cooling water circuit→Cylinder valve open, electronic thermostat regulating plug blocks the liquid hole, radiator has cooling liquid flow→Water pump;

[0050] The medium flow direction in large circulation working condition is as follows:

[0051] Water pump→Engine cooling water circuit→Cylinder valve open, electronic thermostat regulating plug blocks the liquid hole, radiator has cooling liquid flow→Water pump;

[0052] When the large and small circulation is opened, only the liquid hole and the inlet II are connected by the electronic thermostat regulating plug, and the medium flow direction is the combination of the small circulation and the large circulation, which will not be described here.

[0053] The plug can be replaced by a valve body, which will not be described here.

[0054] In this embodiment, an oil cooler is also included, which is selected from any one of the prior art, and will not be described here; the water inlet end of the oil cooler is communicated to the liquid outlet of the water pump, and the water outlet end of the oil cooler is communicated to the liquid inlet of the water pump. The oil cooler takes low-temperature and high-pressure cooling liquid from the water outlet of the water pump back to the water pump, ensuring the flow and cooling performance of the oil cooler.

[0055] In this embodiment, a turbocharger is also included, which is selected from any one of the prior art, and will not be described here; the water inlet end of the turbocharger is communicated to the liquid outlet of the water pump, and the water outlet end of the turbocharger is communicated to the liquid inlet of the water pump. The turbocharger takes low-temperature and high-pressure cooling liquid from the water outlet of the water pump back to the water pump, ensuring the flow and cooling performance of the turbocharger.

[0056] In this embodiment, a warm air core is also included, which is selected from any one of the prior art, and will not be described here; the water inlet end of the warm air core is communicated to the hot end of the engine cooling water circuit, and the water outlet end of the warm air core is communicated to the liquid inlet I of the liquid inlet cavity. The water taking position of the warm air core is close to the hot end of the engine cooling water circuit, and the cooling medium temperature of the hot end is used for heat exchange with the warm air core. Since the water temperature of the hot end of the engine cooling water circuit is 10-15℃ higher than the average water temperature of other areas of the cylinder head water jacket, the passenger compartment can be quickly heated, and the comfort of the driver is improved.

[0057] In the embodiment, a temperature monitoring device for monitoring the outlet water temperature of the engine cooling water circuit is further included, which is arranged at the outlet end of the engine cooling water circuit; the temperature monitoring device adopts any temperature sensor in the prior art to monitor the outlet water temperature of the engine cooling water circuit to the electronic temperature regulator, thereby facilitating the control of the water pump and other open circuits in the cooling system, which will not be described here.

[0058] In the embodiment, an expansion water tank is further included, which is selected from any expansion water tank in the prior art, which will not be described here; the engine cooling water circuit further communicates to the liquid inlet of the water pump through the expansion water tank.

[0059] In the embodiment, the radiator further communicates to the liquid inlet of the water pump through the expansion water tank.

[0060] In the embodiment, an EGR cooler is further included, which is selected from any EGR cooler in the prior art, which will not be described here; the water inlet end of the EGR cooler communicates to the liquid outlet of the water pump, and the water outlet end of the EGR cooler communicates to the liquid inlet I of the liquid inlet cavity; the EGR cooler takes the low-temperature and high-pressure cooling liquid from the water outlet of the water pump back to the radiator before the cooling liquid is returned to the radiator, thereby ensuring the heat exchange performance of the EGR cooler and cooling the high-temperature cooling liquid passing through the EGR cooler through the radiator.

[0061] In the embodiment, the EGR cooler further communicates to the liquid inlet of the water pump through the expansion water tank.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. An engine cooling system, characterized in that: This includes the water pump, engine cooling system, electronic thermostat, radiator, and cylinder block valves; The engine cooling water circuit includes a front section cooling channel for the cylinder head, a cylinder block cooling channel, and a rear section cooling channel for the cylinder head. The cylinder block cooling channel connects the front section cooling channel for the cylinder head and the rear section cooling channel for the cylinder head. The front section cooling channel for the cylinder head has a cylinder head inlet, and the rear section cooling channel for the cylinder head has a cylinder head outlet. The outlet of the water pump is connected to the cylinder head inlet so that the coolant is pumped by the water pump through the cylinder head inlet to the engine cooling water circuit. The electronic temperature controller has a liquid inlet chamber and a liquid dispensing chamber; The liquid inlet chamber has a liquid inlet I that communicates with the liquid outlet of the cylinder head, and the liquid inlet chamber also has a liquid outlet I that communicates with the liquid inlet of the radiator. The liquid distribution chamber has an inlet II that communicates with the liquid outlet of the radiator, and the liquid distribution chamber also has an outlet II that communicates with the liquid inlet of the water pump. The liquid separation chamber and the liquid inlet chamber are connected through a liquid passage hole. A plug is provided in the liquid separation chamber. The plug is controlled to connect the liquid passage hole and the liquid inlet II, or the plug is controlled to block the liquid passage hole or the liquid inlet II. The cylinder cooling channel is also connected to the liquid inlet chamber. The cylinder valve is installed on the channel connecting the cylinder cooling channel and the liquid inlet chamber. The cylinder valve is controlled to connect or disconnect the cylinder cooling channel and the liquid inlet chamber.

2. The engine cooling system according to claim 1, characterized in that: It also includes an oil cooler, the inlet of which is connected to the outlet of a water pump, and the outlet of which is connected to the inlet of a water pump.

3. The engine cooling system according to claim 1, characterized in that: It also includes a turbocharger, the water inlet of which is connected to the outlet of the water pump, and the water outlet of the turbocharger is connected to the inlet of the water pump.

4. The engine cooling system according to claim 1, characterized in that: It also includes a heater core, the water inlet of which is connected to the hot end of the engine cooling water circuit, and the water outlet of which is connected to the liquid inlet I of the liquid inlet chamber.

5. The engine cooling system according to claim 1, characterized in that: It also includes a temperature monitoring device for monitoring the outlet temperature of the engine cooling water circuit, the temperature monitoring device being installed at the outlet end of the engine cooling water circuit.

6. The engine cooling system according to claim 1, characterized in that: The cylinder valve is a wax-type thermostat.

7. The engine cooling system according to claim 1, characterized in that: It also includes an expansion tank, and the engine cooling water circuit is connected to the water pump inlet via the expansion tank.

8. The engine cooling system according to claim 7, characterized in that: The radiator is also connected to the inlet of the water pump via an expansion tank.

9. The engine cooling system according to claim 7, characterized in that: It also includes an EGR cooler, the inlet of which is connected to the outlet of the water pump, and the outlet of which is connected to the inlet I of the inlet chamber.

10. The engine cooling system according to claim 9, characterized in that: The EGR cooler is also connected to the inlet of the water pump via an expansion tank.

Images