EGR (Exhaust Gas Recirculation) cooling control system, control method and vehicle

Abstract

The invention relates to the technical field of vehicle engines, in particular to an EGR cooling control system and method and a vehicle, and the EGR cooling control system structurally comprises an EGR cooler; an EGR (exhaust gas recirculation) valve, wherein the EGR cooler is communicated with the EGR valve; the cooling water passage is communicated with the EGR cooler; a throttle valve provided in the cooling water passage; and the controller is connected with the EGR valve and the throttling valve through wires, and the controller can adjust the opening degree of the throttling valve according to the opening degree of the EGR valve. The EGR cooling control system, the control method and the vehicle can solve the problem of how to further improve the heat efficiency of the engine.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle engines, and in particular to an EGR cooling control system, a control method and a vehicle. Background Art

[0002] At present, all engine manufacturers on the market are developing high thermal efficiency engines, and the most direct and effective way to improve the thermal efficiency of engines is to reduce the energy consumption of components.

[0003] Existing high thermal efficiency engines all use a large flow cooling EGR system (exhaust gas recirculation system), but the water flow of the EGR cooling system is not accurately controlled. In particular, when the engine is idling or the throttle is fully open, the EGR valve is no longer required to work. At this time, the EGR valve is closed, but the cooling water still circulates in the EGR cooling system, causing the water pump to have excess capacity, thereby increasing the energy consumption of the water pump, and further affecting the thermal efficiency of the engine. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide an EGR cooling control system, a control method and a vehicle to solve the problem of how to further improve the thermal efficiency of the engine.

[0005] According to a first aspect of the present invention, an EGR cooling control system is provided, wherein the EGR cooling control system includes: an EGR cooler; an EGR valve, the EGR cooler is connected to the EGR valve; a cooling water passage, connected to the EGR cooler; a throttle valve, arranged in the cooling water passage; and a controller, connected to the EGR valve and the throttle valve by a wire, the controller being able to adjust the opening of the throttle valve according to the opening of the EGR valve.

[0006] Preferably, the cooling water passage includes: a water pump connected to a water source of the vehicle; a water inlet passage connecting the water pump and the EGR cooler, the throttle valve being arranged on the water inlet passage; and a water return passage connecting the EGR cooler and the water pump.

[0007] Preferably, the EGR cooling control system further includes an intake portion, wherein the intake portion includes: an intake pipe connected to the EGR cooler; and a catalyst connected to the intake pipe, wherein the catalyst supplies exhaust gas to the EGR cooler.

[0008] Preferably, the EGR cooling control system further includes a temperature sensor, which is disposed between the EGR cooler and the EGR valve and is used to detect the temperature of the exhaust gas.

[0009] Preferably, the EGR cooling control system further includes an outlet portion, which includes: an outlet pipe, which is connected to the EGR valve; and an intake manifold, which is connected to the outlet pipe, and the EGR valve discharges exhaust gas to the intake manifold.

[0010] Preferably, the temperature sensor is installed on a side of the EGR valve close to the EGR cooler.

[0011] According to a second aspect of the present invention, a control method for an EGR cooling control system is provided, wherein the EGR cooling control system is the EGR cooling control system as described above, and the control method for the EGR cooling control system comprises: calibrating according to the temperature detected by the temperature sensor; establishing a corresponding relationship between the opening of the EGR valve and the opening of the throttle valve.

[0012] Preferably, when the opening of the EGR valve increases, the controller controls the opening of the throttle valve to increase; and when the opening of the EGR valve decreases, the controller controls the opening of the throttle valve to decrease.

[0013] Preferably, when the opening degree of the EGR valve is 0, the controller controls the throttle valve to close.

[0014] According to a third aspect of the present invention, there is provided a vehicle, wherein the vehicle includes the EGR cooling control system as described above.

[0015] An EGR cooling control system, control method and vehicle according to an embodiment of the present invention, wherein the EGR cooler is connected to the EGR valve. A cooling water passage is connected to the EGR cooler for providing cooling water to the EGR cooler. A throttle valve is arranged in the cooling water passage. The controller is connected to the EGR valve and the throttle valve by a wire, and the controller can adjust the opening of the throttle valve according to the opening of the EGR valve to accurately control the flow of cooling water, reduce the circulation of cooling water in the EGR cooling control system, thereby reducing the energy consumption caused by the circulation of cooling water, and further improving the thermal efficiency of the engine. This can effectively solve the problem of how to further improve the thermal efficiency of the engine.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a schematic diagram of an EGR cooling control system according to the present invention.

[0019] Figure numerals: 1-EGR cooler; 2-EGR valve; 3-throttle valve; 4-controller; 5-water pump; 51-water inlet passage; 52-water return passage; 6-catalyst; 61-intake pipe; 7-intake manifold; 71-exhaust pipe; 8-temperature sensor. DETAILED DESCRIPTION

[0020] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0021] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0022] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0023] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0024] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0025] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0026] The terms used herein are only used to describe various examples and are not used to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprising" and "having" list the existence of the stated features, quantities, operations, components, elements and / or their combinations, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0027] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0028] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0029] like Figure 1 As shown, according to a first aspect of the present invention, an EGR cooling control system is provided, which includes an EGR cooler 1, an EGR valve 2, a cooling water passage, a throttle valve 3 and a controller 4.

[0030] In the following description, reference will be made to Figure 1 The specific structures of the above components of the EGR cooling control system and the connection relationships of the above components are described in detail.

[0031] like Figure 1 As shown, in the embodiment, the EGR cooler 1 is a heat exchanger that cools down by water cooling, and the EGR cooler 1 is used to reduce the temperature of the exhaust gas involved in the recirculation. The EGR cooler 1 can be connected to the EGR valve 2. The exhaust gas in the EGR cooler 1 can be discharged through the EGR valve 2. The cooling water passage can be connected to the EGR cooler 1, and is used to supply cooling water to the EGR cooler 1 to cool down the exhaust gas. At the same time, a throttle valve 3 can also be provided on the cooling water passage to adjust the flow of cooling water entering the EGR cooler 1. The controller 4 can be connected to the EGR valve 2 and the throttle valve 3 through a wire. The controller 4 can adjust the opening of the throttle valve 3 according to the opening of the EGR valve 2 to accurately control the flow of cooling water flowing into the EGR cooler 1, reduce the circulation of cooling water in the EGR cooling control system, thereby reducing the energy consumption caused by the circulation of cooling water, and then achieve the improvement of the thermal efficiency of the vehicle's engine.

[0032] Preferably, Figure 1 As shown, in the embodiment, the cooling water passage is used to provide cooling water to the EGR cooler 1 to exchange heat with the exhaust gas with a higher temperature, thereby cooling the exhaust gas. At the same time, the cooling water after heat exchange in the EGR cooler 1 can be discharged from the EGR cooler 1 through the cooling water passage.

[0033] Further, preferably, Figure 1 As shown, in an embodiment, the cooling water passage may include a water pump 5, a water inlet passage 51 and a water return passage 52. The water pump 5 may be a water pump of the vehicle. The water pump 5 is connected to a water source of the vehicle (for example, a water tank connected to the vehicle for storing coolant). The water pump 5 can supply water to multiple systems of the vehicle at the same time. The two ends of the water inlet passage 51 can be connected to the water pump 5 and the EGR cooler 1 respectively. The cooling water supplied by the water pump 5 can flow to the EGR cooler 1 through the water inlet passage 51 to cool the exhaust gas. The throttle valve 3 can be arranged on the water inlet passage 51, thereby controlling the flow of cooling water flowing into the EGR cooler 1 by adjusting the opening of the throttle valve 3. The two ends of the water return passage 52 can connect the EGR cooler 1 with the water pump 5, so that the cooling water after completing the heat exchange in the EGR cooler 1 can flow back to the water pump 5 through the water return passage 52.

[0034] Preferably, Figure 1As shown, in an embodiment, the EGR cooling control system may further include an air intake portion. The air intake portion is connected to the EGR cooler 1 and is used to supply exhaust gas to the EGR cooler 1, that is, exhaust gas is discharged into the EGR cooler 1 for cooling so that the exhaust gas can re-circulate.

[0035] Further, preferably, Figure 1 As shown, in an embodiment, the air intake portion may include an air intake pipe 61 and a catalyst pipe. The catalyst 6 may be a catalyst of the engine of the vehicle, which is used to catalyze the exhaust gas to reduce harmful gases therein. The air intake pipe 61 may be connected to the EGR cooler 1. After the exhaust gas generated by the engine is catalyzed in the catalyst 6, it can be transported to the EGR cooler 1 through the air intake pipe 61, that is, the catalyst 6 supplies the exhaust gas to the EGR cooler 1.

[0036] Preferably, Figure 1 As shown, in an embodiment, the EGR cooling control system may further include an outlet portion, and the outlet portion includes an outlet pipe 71 and an intake manifold 7. The outlet pipe 71 may be connected to the EGR valve 2. The exhaust gas after heat exchange in the EGR cooler 1 is discharged to the outlet pipe 71 through the EGR valve 2. The intake manifold 7 is connected to the outlet pipe 71. The EGR valve 2 discharges the exhaust gas to the intake manifold 7 through the outlet pipe 71, so that the exhaust gas after heat exchange can re-participate in the circulation.

[0037] Preferably, Figure 1 As shown, in an embodiment, the EGR cooling control system may further include a temperature sensor 8. The temperature sensor 8 may be disposed between the EGR cooler 1 and the EGR valve 2 to detect the temperature of the exhaust gas. The temperature sensor 8 can detect the temperature of the exhaust gas in real time, so that the operator can obtain the opening of the EGR valve 2 according to the detection result of the temperature sensor 8, and then adjust the opening of the throttle valve 3 through the controller 4. Further, preferably, the temperature sensor 8 may be installed on the side of the EGR valve 2 close to the EGR cooler 1 by bolts.

[0038] During use, the temperature sensor 8 can detect the temperature of the exhaust gas at the EGR valve 2 in real time, and can obtain the opening of the EGR valve 2 according to the detection result. The controller 4 can adjust the opening of the throttle valve 3 according to the opening of the EGR valve 2 to accurately control the flow of cooling water flowing into the EGR cooler 1, reduce the circulation of cooling water in the EGR cooling control system, thereby reducing the energy consumption of the water pump 5 due to the circulation of cooling water, and thus improve the thermal efficiency of the vehicle engine.

[0039] In addition, if Figure 1As shown, according to the second aspect of the present invention, a control method for an EGR cooling control system is provided, wherein the EGR cooling control system is the EGR cooling control system as described above, and the control method for the EGR cooling control system includes calibrating according to the temperature detected by the temperature sensor 8; establishing a corresponding relationship between the opening of the EGR valve 2 and the opening of the throttle valve 3.

[0040] Specifically, in the embodiment, the temperature sensor 8 can detect the temperature of the exhaust gas at the EGR valve 2 in real time. The detected temperature of the temperature sensor 8 can be calibrated first, and then the opening of the EGR valve 2 can be obtained according to the detection result of the temperature sensor 8, so that it is easy to judge the opening of the EGR valve 2. A corresponding relationship between the opening of the EGR valve 2 and the opening of the throttle valve 3 is established, so that the controller 4 can control the opening of the throttle valve 3 according to the corresponding relationship between the opening of the EGR valve 2 and the opening of the throttle valve 3, and then can finely adjust the opening of the throttle valve 3 according to the different opening conditions of the EGR valve 2, thereby reducing the energy consumption of the water pump 5 due to the circulation of cooling water.

[0041] Further, preferably, in the embodiment, the opening of the throttle valve 3 may be positively correlated with the opening of the EGR valve 2. When the opening of the EGR valve 2 increases, the controller 4 may control the opening of the throttle valve 3 to increase. When the opening of the EGR valve 2 decreases, the controller 4 may control the opening of the throttle valve 3 to decrease. Thus, the opening of the throttle valve 3 can be adjusted according to the opening of the EGR valve 2, and then the flow of the cooling water can be adjusted to avoid excessive flow of the cooling water, which causes waste of the power of the water pump 5.

[0042] More preferably, in an embodiment, when the opening of the EGR valve 2 is 0, the controller 4 can control the throttle valve 3 to close. In this way, when the opening of the EGR valve 2 is 0, the water pump 5 will no longer supply water to the EGR cooler 1, thereby saving energy consumption caused by water circulation of the EGR cooler 1, thereby improving the thermal efficiency of the vehicle's engine.

[0043] Furthermore, according to a third aspect of the present invention, there is provided a vehicle, the vehicle including the control method of the cooling control system as described above.

[0044] During use, the temperature sensor 8 of the vehicle can detect the temperature of the exhaust gas at the EGR valve 2 in real time, and can obtain the opening of the EGR valve 2 according to the detection result. The controller 4 can adjust the opening of the throttle valve 3 according to the opening of the EGR valve 2 to accurately control the flow of cooling water flowing into the EGR cooler 1, reduce the circulation of cooling water in the EGR cooling control system, thereby reducing the energy consumption of the water pump 5 due to the circulation of cooling water, and thus improve the thermal efficiency of the engine of the vehicle.

[0045] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An EGR cooling control system, arranged in a vehicle, characterized in that: The EGR cooling control system includes: EGR cooler; An EGR valve, the EGR cooler being connected to the EGR valve; A cooling water passage connected to the EGR cooler; a throttle valve, disposed in the cooling water passage; and A controller is connected to the EGR valve and the throttle valve through a wire, and the controller can adjust the opening of the throttle valve according to the opening of the EGR valve.

2. The EGR cooling control system according to claim 1, characterized in that: The cooling water passage comprises: a water pump connected to a water source of the vehicle; a water inlet passage connecting the water pump and the EGR cooler, wherein the throttle valve is arranged on the water inlet passage; and The water return passage connects the EGR cooler and the water pump.

3. The EGR cooling control system according to claim 2, characterized in that: The EGR cooling control system further includes an air intake portion, wherein the air intake portion includes: an intake pipe, the intake pipe being connected to the EGR cooler; and A catalyst is connected to the intake pipe, and the catalyst supplies exhaust gas to the EGR cooler.

4. The EGR cooling control system according to claim 3, characterized in that: The EGR cooling control system further includes a temperature sensor, which is disposed between the EGR cooler and the EGR valve and is used to detect the temperature of the exhaust gas.

5. The EGR cooling control system according to claim 4, characterized in that: The EGR cooling control system further includes an air outlet portion, wherein the air outlet portion includes: an air outlet pipe, the air outlet pipe being connected to the EGR valve; and The intake manifold is connected to the exhaust pipe, and the EGR valve discharges exhaust gas to the intake manifold.

6. The EGR cooling control system according to claim 5, characterized in that: The temperature sensor is installed on a side of the EGR valve close to the EGR cooler.

7. A control method of an EGR cooling control system, characterized in that: The EGR cooling control system is the EGR cooling control system according to claim 5 or 6, and the control method of the EGR cooling control system includes: Calibrate according to the temperature detected by the temperature sensor; A corresponding relationship between the opening degree of the EGR valve and the opening degree of the throttle valve is established.

8. The control method of the EGR cooling control system according to claim 7, characterized in that: When the opening degree of the EGR valve increases, the controller controls the opening degree of the throttle valve to increase; when the opening degree of the EGR valve decreases, the controller controls the opening degree of the throttle valve to decrease.

9. The control method of the EGR cooling control system according to claim 8, characterized in that: When the opening degree of the EGR valve is 0, the controller controls the throttle valve to be closed.

10. A vehicle, characterized in that: The vehicle includes the EGR cooling control system according to any one of claims 1 to 6.

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