Engine cooling integrated structure with integrated electronic water pump application

Abstract

The present invention discloses an engine cooling integrated structure with integrated electronic water pump application, which is integrated on the engine body. The engine cooling integrated structure includes a water tank, a main water pump, a thermostat, an electronic water pump and a supercharger. The water inlet of the main water pump is connected to the water outlet of the water tank through a pipeline; the first water outlet of the thermostat is connected to the water return port of the main water pump through a pipeline, and the second water outlet of the thermostat is connected to the water return port of the water tank through a pipeline; the water inlet of the electronic water pump is connected to the water outlet of the main water pump through a pipeline; the water inlet of the supercharger is connected to the water outlet of the electronic water pump through a pipeline, and the water outlet of the supercharger is connected to the first water inlet of the thermostat through a pipeline. When the engine stops and the main water pump stops, the engine cooling integrated structure of the present invention can still cool the supercharger by relying on the operation of the electronic water pump.

Description

Technical Field

[0001] The invention relates to the field of engines, in particular to an engine cooling integrated structure with integrated electronic water pump application. Background Art

[0002] Hybrid electric vehicles have the characteristic of frequent engine start-stop. When the engine is stopped, the oil pump and water pump stop working. The supercharger relies on oil and coolant for cooling. When the engine is stopped, the oil and coolant stop flowing, and the supercharger generates heat. The greater the load before the shutdown, the higher the heat recovery temperature, and the greater the risk of oil coking. Oil coking leads to poor lubrication and bearing wear, which can cause impeller rubbing and shaft breakage.

[0003] The existing technology generally adopts the method of idling the engine for a certain period of time before stopping the engine to reduce the thermal load of the supercharger and the reheating temperature of the supercharger when stopping. However, this method requires the engine to be in idle for a long time before the reheating temperature of the supercharger can be controlled within the limit range, which is not conducive to the operating economy of hybrid electric vehicles.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide an engine cooling integrated structure integrating the application of an electronic water pump, because the application of the integrated electronic water pump can make the engine no longer have to run at idle speed before stopping.

[0006] To achieve the above-mentioned purpose, the present invention provides an engine cooling integrated structure with an integrated electronic water pump application, which is integrated on the engine body, and the engine cooling integrated structure includes a water tank, a main water pump, a thermostat, an electronic water pump and a supercharger. The water inlet of the main water pump is connected to the water outlet of the water tank through a pipeline; the first water outlet of the thermostat is connected to the water return port of the main water pump through a pipeline, and the second water outlet of the thermostat is connected to the water return port of the water tank through a pipeline; the water inlet of the electronic water pump is connected to the water outlet of the main water pump through a pipeline; the water inlet of the supercharger is connected to the water outlet of the electronic water pump through a pipeline, and the water outlet of the supercharger is connected to the first water inlet of the thermostat through a pipeline.

[0007] In a preferred embodiment, the water outlet of the main water pump is also connected to the water inlet of the engine body through a pipeline, and the water outlet of the engine body is connected to the second water inlet of the thermostat through a pipeline.

[0008] In a preferred embodiment, when the engine is running, the main water pump is turned on, the electronic water pump is turned off, and the thermostat is closed at the same time, the coolant enters the return water port of the main water pump through the water outlet of the water tank, the main water pump, the engine body, the second water inlet and the first water outlet of the thermostat to form an internal circulation in the engine. Under the same conditions, the coolant also enters the return water port of the main water pump through the water outlet of the water tank, the main water pump, the electronic water pump, the supercharger, the first water inlet and the first water outlet of the thermostat to form an internal circulation in the supercharger. The internal circulation in the engine is in parallel with the internal circulation in the supercharger.

[0009] In a preferred embodiment, when the engine is running, the main water pump is turned on, the electronic water pump is stopped, and the thermostat is turned on at the same time, the coolant enters the water return port of the water tank through the water outlet of the water tank, the main water pump, the engine body, the second water inlet and the second water outlet of the thermostat to form an external circulation of the engine. Under the same conditions, the coolant also enters the water return port of the water tank through the water outlet of the water tank, the main water pump, the electronic water pump, the supercharger, the first water inlet and the second water outlet of the thermostat to form an external circulation of the supercharger. The external circulation of the engine and the external circulation of the supercharger are in parallel.

[0010] In a preferred embodiment, when the engine stops, the main water pump is shut down and the electronic water pump is started, and the thermostat is closed, the coolant enters the return water port of the main water pump through the water outlet of the water tank, the main water pump, the electronic water pump, the supercharger, the first water inlet and the first water outlet of the thermostat to form a separate external circulation of the supercharger.

[0011] In a preferred embodiment, when the engine stops, the main water pump is stopped, the electronic water pump is started, and the thermostat is opened at the same time, the coolant enters the return water port of the water tank through the water outlet of the water tank, the main water pump, the electronic water pump, the supercharger, the first water inlet and the second water outlet of the thermostat to form a separate external circulation of the supercharger.

[0012] In a preferred embodiment, the engine cooling integrated structure with integrated electronic water pump application further includes an engine controller connected to the electronic water pump via a control line.

[0013] Compared with the prior art, the engine cooling integrated structure using the integrated electronic water pump of the present invention has the following beneficial effects: when the engine is shut down, even if the main water pump driven by the crankshaft belt stops running, the electronic water pump can still work independently, ensuring that the coolant still flows through the supercharger and cools the supercharger, preventing the increase in heat back from causing oil coking, and increasing the service life of the supercharger, thereby improving the quality of the engine product and improving the operating economy of the hybrid electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the structural principle of an engine cooling integrated structure according to an embodiment of the present invention.

[0015] Description of main reference numerals:

[0016] 1-water tank, 2-main water pump, 3-thermostat, 31-first water outlet, 32-second water outlet, 33-first water inlet, 34-second water inlet, 4-electronic water pump, 5-supercharger, 6-engine controller, 7-engine body, 8-control circuit, 9-pipeline. DETAILED DESCRIPTION

[0017] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0018] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0019] In one or more embodiments of the present invention, the connections of the cooling pipelines between the various components are collectively described by pipelines 9 .

[0020] like Figure 1 As shown, an engine cooling integrated structure with an integrated electronic water pump application according to a preferred embodiment of the present invention is integrated on an engine body 7. The engine cooling integrated structure includes a water tank 1, a main water pump 2, a thermostat 3, an electronic water pump 4 and a supercharger 5. The water inlet of the main water pump 2 is connected to the water outlet of the water tank 1 through a pipeline 9. The thermostat has two water inlets and two water outlets. The first water outlet 31 of the thermostat 3 is connected to the water return port of the main water pump 2 through a pipeline 9, and the second water outlet 32 ​​of the thermostat 3 is connected to the water return port of the water tank 1 through a pipeline 9. The water inlet of the electronic water pump 4 is connected to the water outlet of the main water pump 2 through a pipeline 9. The water inlet of the supercharger 5 is connected to the water outlet of the electronic water pump 4 through a pipeline 9, and the water outlet of the supercharger 5 is connected to the first water inlet 33 of the thermostat 3 through a pipeline 9.

[0021] In this embodiment, the water outlet of the main water pump 2 is also connected to the water inlet of the engine body 7 through the pipeline 9 , and the water outlet of the engine body 7 is connected to the second water inlet 34 of the thermostat 3 through the pipeline 9 .

[0022] In some embodiments, the engine cooling integrated structure of the integrated electronic water pump of the present invention works as follows:

[0023] When the engine is running, with the main water pump 2 turned on, the electronic water pump 4 stopped, and the thermostat 3 closed (the first water outlet 31 is open, and the second water outlet 32 ​​is closed), the coolant enters the return water port of the main water pump 2 through the water outlet of the water tank 1, the main water pump 2, the engine body 7, the second water inlet 34 of the thermostat 3, and the first water outlet 31 to form an internal circulation in the engine. Under the same conditions, the coolant also enters the return water port of the main water pump 2 through the water outlet of the water tank 1, the main water pump 2, the electronic water pump 4, the supercharger 5, the first water inlet 33 of the thermostat 3, and the first water outlet 31 to form an internal circulation in the supercharger. The internal circulation in the engine and the internal circulation in the supercharger are in parallel.

[0024] When the engine is running, with the main water pump 2 turned on, the electronic water pump 4 stopped, and the thermostat 3 turned on (the first water outlet 31 is open, and the second water outlet 32 ​​is closed), the coolant enters the return water port of the water tank 1 through the water outlet of the water tank 1, the main water pump 2, the engine body 7, the second water inlet 34 of the thermostat 3, and the second water outlet 32 ​​to form an external circulation of the engine. Under the same conditions, the coolant also enters the return water port of the water tank 1 through the water outlet of the water tank 1, the main water pump 2, the electronic water pump 4, the supercharger 5, the first water inlet 33 of the thermostat 3, and the second water outlet 32 ​​to form an external circulation of the supercharger. The external circulation of the engine and the external circulation of the supercharger are in parallel.

[0025] When the engine stops, with the main water pump 2 stopped, the electronic water pump 4 started, and the thermostat 3 closed, the coolant enters the return water port of the main water pump 2 through the water outlet of the water tank 1, the main water pump 2, the electronic water pump 4, the supercharger 5, the first water inlet 33 and the first water outlet 31 of the thermostat 3 to form a separate internal circulation of the supercharger.

[0026] When the engine stops, when the main water pump 2 is stopped, the electronic water pump 4 is started, and the thermostat 3 is opened, the coolant enters the return water port of the water tank 1 through the water outlet of the water tank 1, the main water pump 2, the electronic water pump 4, the supercharger 5, the first water inlet 33 and the second water outlet 32 ​​of the thermostat 3 to form a separate external circulation of the supercharger.

[0027] In one embodiment, the engine cooling integrated structure with integrated electronic water pump application further includes an engine controller 6, which is connected to the electronic water pump 4 through a control line 8. The engine controller 6 is used to send a command to the electronic water pump 4 to run when the engine is stopped and the main water pump 2 is stopped, and the electronic water pump 4 starts to work. Conversely, when the engine is restarted and the main water pump 2 starts to run, the engine controller 6 sends a command to stop to the electronic water pump 4. The power supply of the electronic water pump 4 is provided by the vehicle battery, and the control and feedback between the electronic water pump 4 and the engine controller 6 adopt CAN communication.

[0028] In some embodiments, a corresponding heat dissipation device (not shown) is generally disposed on the water tank 1. The electronic water pump 4 is generally disposed on the original cooling pipeline of the supercharger 5, and there is no need to set up an additional pipeline separately to save costs.

[0029] In summary, the engine cooling integrated structure using an integrated electronic water pump of the present invention has the following advantages: when the engine is shut down, even if the main water pump driven by the crankshaft belt stops running, the electronic water pump can still work independently, ensuring that the coolant still flows through the supercharger and cools the supercharger, preventing the increase in heat back from causing oil coking, and increasing the service life of the supercharger, thereby improving the quality of the engine product and the operating economy of the hybrid electric vehicle.

[0030] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. An engine cooling integrated structure with an integrated electronic water pump application, which is integrated on the engine body, characterized in that: The engine cooling integrated structure comprises: Water tank; A main water pump, whose water inlet is connected to the water outlet of the water tank through a pipeline; A thermostat, wherein a first water outlet of the thermostat is connected to a water return port of the main water pump through a pipeline, and a second water outlet of the thermostat is connected to a water return port of the water tank through a pipeline; an electronic water pump, the water inlet of which is connected to the water outlet of the main water pump through a pipeline; and A supercharger, whose water inlet is connected to the water outlet of the electronic water pump through a pipeline, and the water outlet of the supercharger is connected to the first water inlet of the thermostat through a pipeline; The water outlet of the main water pump is also connected to the water inlet of the engine body through a pipeline, and the water outlet of the engine body is connected to the second water inlet of the thermostat through a pipeline; When the engine is running, the main water pump is turned on, the electronic water pump is stopped, and at the same time the first water outlet of the thermostat is opened and the second water outlet is closed, the coolant enters the water return port of the main water pump through the water outlet of the water tank, the main water pump, the engine body, the second water inlet of the thermostat, and the first water outlet to form an internal circulation in the engine, and at the same time the coolant enters the water return port of the main water pump through the water outlet of the water tank, the main water pump, the electronic water pump, the supercharger, the first water inlet of the thermostat, and the first water outlet to form an internal circulation in the supercharger, and the internal circulation in the engine and the internal circulation in the supercharger are in a parallel relationship; When the engine is running, the main water pump is turned on, the electronic water pump is stopped, and at the same time the second water outlet of the thermostat is turned on and the first water outlet is closed, the coolant enters the water return port of the water tank through the water outlet of the water tank, the main water pump, the engine body, the second water inlet of the thermostat, and the second water outlet to form an external circulation of the engine body, and at the same time the coolant enters the water return port of the water tank through the water outlet of the water tank, the main water pump, the electronic water pump, the supercharger, the first water inlet of the thermostat, and the second water outlet to form an external circulation of the supercharger, and the external circulation of the engine body and the external circulation of the supercharger are in parallel relationship; When the engine stops, the main water pump stops, the electronic water pump starts, the first water outlet of the thermostat opens, and the second water outlet closes, the coolant enters the water return port of the main water pump through the water outlet of the water tank, the main water pump, the electronic water pump, the supercharger, the first water inlet of the thermostat, and the first water outlet to form a separate internal circulation of the supercharger; When the engine stops, the main water pump stops, the electronic water pump starts, and at the same time the second water outlet of the thermostat is opened and the first water outlet is closed, the coolant enters the water return port of the water tank through the water outlet of the water tank, the main water pump, the electronic water pump, the supercharger, the first water inlet of the thermostat, and the second water outlet to form a separate external circulation of the supercharger.

2. The engine cooling integrated structure with integrated electronic water pump as claimed in claim 1, characterized in that: It also includes an engine controller which is connected to the electronic water pump via a control line.

Images