Mechanical intercooling bypass valve and engine system
By adjusting the by-flux by using a drive spring and a moisture-absorbing fiber rod, the combustion abnormalities and fuel consumption problems caused by condensate in low-pressure cooling EGR turbocharged engines are solved, and rapid temperature regulation and cost reduction are achieved.
Patent Information
- Application Number
- CN202422306289.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In low-pressure cooling EGR turbocharged engines, gas condensate after intercooling leads to deterioration of combustion stability and fuel consumption, and the prior art adjustment speed is slow and costly.
A mechanical intercooled bypass valve is used, and a driving spring and absorbent fiber rod are used as a driving mechanism to adjust the bypass amount according to the intake humidity, quickly adjust the gas temperature to avoid the generation of condensation water.
Rapidly adjust the gas temperature after intercooling, inhibit the generation of condensate, improve combustion abnormalities and fuel consumption, reduce system costs and control difficulties.
Smart Images
Figure CN223177628U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicles, in particular to a mechanical intercooler bypass valve and an engine system. Background Art
[0002] Exhaust Gas Re-circulation (EGR) is an energy-saving and emission-reduction technology that has developed rapidly in recent years and has become a standard configuration for mainstream hybrid dedicated engines. However, for a turbocharged engine with low-pressure cooled EGR, after the high-temperature and high-humidity intake air processed by the compressor passes through the intercooler and is cooled, the temperature will drop below the dew point temperature, and then condensate will be generated. The condensate will flow into the cylinders closer to the inlet of the engine intake manifold, seriously damaging the combustion stability and fuel consumption of the engine.
[0003] In order to avoid the generation of condensate after intercooling, in the related art, a method of correcting the EGR rate based on the condensate amount has been proposed. However, while reducing the EGR rate, this method will reduce the engine thermal efficiency and increase the fuel consumption. A method of avoiding condensation by reducing the circulating water flow of the intercooler or closing the circulating water of the intercooler to increase the temperature after intercooling above the dew point temperature has also been proposed. However, since the low-temperature cooling water pump of a hybrid vehicle usually needs to take into account the cooling requirements of motors, inverters, etc., and due to the high specific heat capacity of water, the adjustment speed of the intercooling temperature during the dynamic process is very slow, so the application is limited. Summary of the Utility Model
[0004] The utility model aims to solve at least one of the technical problems in the related art to some extent. To this end, the first object of the utility model is to propose a mechanical intercooler bypass valve. By using a driving spring and a hygroscopic fiber rod as the driving mechanism of the bypass valve, the bypass amount can be adjusted according to the intake humidity, and then the temperature of the gas after intercooling can be quickly adjusted to avoid the generation of condensate, so as to suppress the abnormal combustion and deterioration of fuel consumption caused by the generation of condensate after intercooling. The bypass valve is driven by a pure mechanical structure, which can greatly reduce the system cost and control difficulty compared with an electronically controlled valve.
[0005] The second object of the utility model is to propose an engine system.
[0006] To achieve the above object, the first aspect of the utility model proposes a mechanical intercooler bypass valve, including: a valve body; a spring fixing device arranged inside the valve body; a driving spring, one end of the driving spring is connected to the spring fixing device, and the other end of the driving spring is connected to the valve; the other end of the valve is connected to a hygroscopic fiber rod; the other end of the hygroscopic fiber rod is fixedly arranged on the inner wall of the intercooler intake pipe.
[0007] In addition, the mechanical intercooler bypass valve according to the utility model above may also have the following additional technical features:
[0008] Further, the caliber of the valve is larger than the communication caliber between the valve body and the intake pipe of the intercooler.
[0009] Further, the moisture-absorbing fiber rod elongates when absorbing water and contracts when dehydrating; the elongation rate of the moisture-absorbing fiber rod is proportional to the gas humidity in the intake pipe of the intercooler.
[0010] Specifically, when the moisture-absorbing fiber rod dehydrates and contracts, the moisture-absorbing fiber rod generates a force in the direction of elongation of the driving spring relative to the valve, so as to reset the valve, and the valve body is not communicated with the intake pipe of the intercooler.
[0011] Specifically, when the moisture-absorbing fiber rod absorbs water and elongates, the moisture-absorbing fiber rod generates a force in the direction of compression of the driving spring relative to the valve, so as to open the valve, and the valve body is communicated with the intake pipe of the intercooler.
[0012] Further, when the valve resets, the driving spring elongates.
[0013] Further, when the valve opens, the driving spring is compressed.
[0014] According to the mechanical intercooler bypass valve of the present utility model, it includes: a valve body; a spring fixing device arranged inside the valve body; a driving spring, one end of the driving spring is connected to the spring fixing device, and the other end of the driving spring is connected to the valve; the other end of the valve is connected to the moisture-absorbing fiber rod; the other end of the moisture-absorbing fiber rod is fixedly arranged on the inner wall of the intake pipe of the intercooler. Thus, by using the driving spring and the moisture-absorbing fiber rod as the driving mechanism of the bypass valve, this bypass valve can adjust the bypass amount according to the intake humidity, and then quickly adjust the temperature of the gas after intercooling, avoid the generation of condensed water, so as to inhibit the abnormal combustion and fuel consumption deterioration phenomena caused by the generation of condensed water after intercooling. The bypass valve is driven by a pure mechanical structure, and compared with the electric control valve, it can greatly reduce the system cost and control difficulty.
[0015] To achieve the above object, the second aspect of the present utility model proposes an engine system, which includes an intercooler and the above-mentioned mechanical intercooler bypass valve, and the mechanical intercooler bypass valve is arranged at the intake pipe of the intake port of the intercooler.
[0016] According to the engine system of the present utility model, through the above-mentioned mechanical intercooler bypass valve, by using the driving spring and the moisture-absorbing fiber rod as the driving mechanism of the bypass valve, it can adjust the bypass amount according to the intake humidity, and then quickly adjust the temperature of the gas after intercooling, avoid the generation of condensed water, so as to inhibit the abnormal combustion and fuel consumption deterioration phenomena caused by the generation of condensed water after intercooling. The bypass valve is driven by a pure mechanical structure, and compared with the electric control valve, it can greatly reduce the system cost and control difficulty.
[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings
[0018] Figure 1 It is an overall block diagram of a mechanical intercooler bypass valve according to some embodiments of the present utility model;
[0019] Figure 2 It is a block diagram of an engine system according to some embodiments of the present utility model.
[0020] Description of the reference numerals:
[0021] Valve body 19, spring fixing device 20, driving spring 18, valve 17, moisture-absorbing fiber rod 16, intercooler intake pipe 21 and valve body 19. Detailed Embodiments
[0022] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to specific embodiments and the accompanying drawings.
[0023] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present utility model should have the ordinary meanings understood by those with ordinary skills in the field to which the present utility model belongs. The "first", "second" and similar terms used in the embodiments of the present utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.
[0024] As described in the background art section, exhaust gas recirculation is an energy-saving and emission-reduction technology that has developed rapidly in recent years and has become a standard configuration for mainstream hybrid-only engines. However, for a turbocharged engine with low-pressure cooled EGR, after the high-humidity and high-temperature intake air processed by the compressor is cooled by the intercooler, the temperature will drop below the dew point temperature, and then condensate will be generated. The condensate will flow into the cylinders closer to the inlet of the engine intake manifold, seriously damaging the combustion stability and fuel consumption of the engine.
[0025] In the process of implementing the present utility model, the applicant found that in order to avoid the generation of condensed water after the intercooler, in the related art, a method of correcting the EGR rate based on the condensation amount was proposed. However, while reducing the EGR rate, this method will result in a loss of engine thermal efficiency and an increase in fuel consumption. A method of avoiding condensation by reducing the circulating water flow of the intercooler or shutting off the circulating water of the intercooler to raise the temperature after the intercooler above the dew point temperature was also proposed. However, since the low-temperature cooling water pump of a hybrid vehicle usually needs to take into account the cooling requirements of the motor, inverter, etc., and due to the high specific heat capacity of water, the adjustment speed of the intercooler temperature during the dynamic process is very slow, so its application is limited.
[0026] The mechanical intercooler bypass valve and engine system proposed in the embodiments of the present utility model will be described below with reference to the accompanying drawings.
[0027] Figure 1 It is an overall block diagram of a mechanical intercooler bypass valve according to some embodiments of the present utility model.
[0028] As Figure 1 shown, the mechanical intercooler bypass valve of the present application may include a valve body 19, a spring fixing device 20, a driving spring 18, a valve 17, a moisture-absorbing fiber rod 16, an intercooler intake pipe 21, and the valve body 19.
[0029] Among them, the spring fixing device 20 is arranged inside the valve body 19, and the spring fixing device 20 can be arranged on the inner wall of the valve body 19.
[0030] One end of the driving spring 18 is connected to the spring fixing device 20, and the other end of the driving spring 18 is connected to the valve 17. Among them, the driving spring 18 is arranged in parallel in the valve body 19.
[0031] The other end of the valve 17 is connected to the moisture-absorbing fiber rod 16, and the other end of the moisture-absorbing fiber rod 16 is fixedly arranged on the inner wall of the intercooler intake pipe 21, and the diameter of the valve 17 is larger than the communication diameter between the valve body 19 and the intercooler intake pipe 21.
[0032] It should be explained that in the embodiments of the present application, the optimal number of the moisture-absorbing fiber rods 16 is 3, in order to better reduce the humidity. The number of the above-mentioned moisture-absorbing fiber rods 16 is only the number indicated by the most preferred embodiment. In specific implementation, the number of the moisture-absorbing fiber rods 16 can be flexibly set according to actual needs.
[0033] The moisture-absorbing fiber rod 16 elongates when absorbing water and contracts when dehydrating. The moisture-absorbing fiber rod 16 can also be a material with the characteristics of elongating when absorbing water and contracting when dehydrating. The elongation rate of the moisture-absorbing fiber rod 16 is proportional to the gas humidity in the intercooler intake pipe 21, that is, the greater the gas humidity, the greater the elongation rate of the moisture-absorbing fiber rod 16; the smaller the gas humidity, the smaller the elongation rate of the moisture-absorbing fiber rod 16.
[0034] In some embodiments of the present invention, when the hygroscopic fiber rod 16 dehydrates and shrinks, the hygroscopic fiber rod 16 generates a force relative to the valve 17 in the extension direction of the driving spring 18 to reset the valve 17, and the valve body 19 is disconnected from the intercooler air intake pipe 21.
[0035] Specifically, when the humidity of the air inlet pipe 21 of the intercooler is low, the moisture-absorbing fiber rod 16 dehydrates and shrinks, Figure 1 In the left half of the valve, the hygroscopic fiber rod 16 contracts toward the intercooler intake duct 21. At this time, the valve 17 moves to the right, driving the drive spring 18 to extend to the right. When the valve 17 cannot move to the right, the hygroscopic fiber rod 16 stops dehydrating and shrinking. When the valve 17 cannot move to the right, it means that the valve 17 has been reset (i.e., the valve 17 is closed), and the valve body 19 is no longer connected to the intercooler intake duct 21.
[0036] In some embodiments of the present invention, when the hygroscopic fiber rod 16 absorbs water and stretches, the hygroscopic fiber rod 16 generates a force relative to the valve 17 in the direction of compression of the drive spring 18, so that the valve 17 opens and the valve body 19 is connected to the intercooler air intake pipe 21.
[0037] Specifically, when the humidity of the gas in the intercooler air inlet pipe 21 is high, the moisture-absorbing fiber rod 16 absorbs water and stretches. Figure 1 In the right half of the valve, the hygroscopic fiber rod 16 extends toward the valve body 19. At this time, the valve 17 moves to the left, driving the drive spring 18 to be compressed to the left. At this time, the valve 17 has been opened, and the valve body 19 is connected to the intercooler intake pipe 21.
[0038] In some embodiments of the present invention, when the valve 17 is reset, the drive spring 18 is extended.
[0039] Specifically, when the valve 17 moves toward the right side of the valve body 19 and cannot move to the right any further, it indicates that the valve 17 is reset (i.e., the valve 17 is closed). Since the other end of the drive spring 18 is connected to the valve 17, when the valve 17 moves to the right, it will drive the drive spring 18 to move to the right (i.e., the drive spring 18 is extended).
[0040] In some embodiments of the present invention, when the valve 17 is opened, the drive spring 18 is compressed.
[0041] Specifically, when the valve 17 moves toward the left side of the valve body 19, it indicates that the valve 17 has been opened. Since the other end of the drive spring 18 is connected to the valve 17, when the valve 17 moves to the left, the drive spring 18 will be driven to move to the left (i.e., the drive spring 18 is compressed).
[0042] In some embodiments, the elastic force of the moisture-absorbing fiber rod 16 is greater than that of the driving spring 18, so that the moisture-absorbing fiber rod 16 has sufficient elastic force to push the valve 17 and drive the driving spring 18 to compress or elongate.
[0043] In summary, the mechanical intercooler bypass valve according to the embodiments of the present invention includes: a valve body; a spring fixing device disposed inside the valve body; a driving spring, one end of the driving spring is connected to the spring fixing device, and the other end of the driving spring is connected to the valve; the other end of the valve is connected to the moisture-absorbing fiber rod; the other end of the moisture-absorbing fiber rod is fixedly disposed on the inner wall of the intake pipe of the intercooler. Thus, by using the driving spring and the moisture-absorbing fiber rod as the driving mechanism of the bypass valve, the bypass valve can adjust the bypass amount according to the intake humidity, and then quickly adjust the temperature of the gas after intercooling, avoiding the generation of condensed water, so as to suppress the abnormal combustion and deterioration of fuel consumption caused by the generation of condensed water after intercooling. The bypass valve is driven by a pure mechanical structure, which can greatly reduce the system cost and control difficulty compared with the electric control valve.
[0044] Corresponding to the above embodiments, the present invention also proposes an engine system.
[0045] Reference Figure 2 , which is a block diagram of an engine system according to some embodiments of the present invention. The engine system 200 includes an intercooler and the above-mentioned mechanical intercooler bypass valve, and the mechanical intercooler bypass valve is disposed at the intake pipe of the intake port of the intercooler.
[0046] According to the engine system of the embodiments of the present invention, through the above-mentioned mechanical intercooler bypass valve, by using the driving spring and the moisture-absorbing fiber rod as the driving mechanism of the bypass valve, the bypass amount can be adjusted according to the intake humidity, and then the temperature of the gas after intercooling can be quickly adjusted, avoiding the generation of condensed water, so as to suppress the abnormal combustion and deterioration of fuel consumption caused by the generation of condensed water after intercooling. The bypass valve is driven by a pure mechanical structure, which can greatly reduce the system cost and control difficulty compared with the electric control valve.
[0047] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present utility model should have the ordinary meanings understood by those with general skills in the field to which the present utility model belongs. The "first", "second" and similar words used in the embodiments of the present utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.
[0048] Although the spirit and principles of the present utility model have been described with reference to several specific embodiments, it should be understood that the present utility model is not limited to the specific embodiments disclosed, and the division of each aspect does not mean that the features in these aspects cannot be combined for benefits. This division is only for the convenience of expression. The present utility model aims to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the appended claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.
Claims
1. A mechanical intercooler bypass valve, characterized in that, Comprising: Valve body (19); A spring fixing device (20) arranged inside the valve body (19); A driving spring (18), one end of the driving spring (18) is connected to the spring fixing device (20), and the other end of the driving spring (18) is connected to the valve (17); the other end of the valve (17) is connected to the moisture-absorbing fiber rod (16); the other end of the moisture-absorbing fiber rod (16) is fixedly arranged on the inner wall of the intercooler intake pipe (21).
2. The mechanical intercooler bypass valve according to claim 1, wherein The diameter of the valve (17) is larger than the communication diameter between the valve body (19) and the intercooler intake pipe (21).
3. The mechanical intercooler bypass valve according to claim 1, wherein The moisture-absorbing fiber rod (16) elongates when absorbing water and contracts when dehydrating; the elongation rate of the moisture-absorbing fiber rod (16) is proportional to the gas humidity in the intercooler intake pipe (21).
4. The mechanical intercooler bypass valve according to claim 1, wherein When the moisture-absorbing fiber rod (16) dehydrates and contracts, the moisture-absorbing fiber rod (16) generates a force in the elongation direction of the driving spring (18) relative to the valve (17), so that the valve (17) resets, and the valve body (19) is not communicated with the intercooler intake pipe (21).
5. The mechanical intercooler bypass valve according to claim 1, wherein When the moisture-absorbing fiber rod (16) absorbs water and elongates, the moisture-absorbing fiber rod (16) generates a force in the compression direction of the driving spring (18) relative to the valve (17), so that the valve (17) opens, and the valve body (19) is communicated with the intercooler intake pipe (21).
6. The mechanical intercooler bypass valve according to claim 4, characterized in that When the valve (17) resets, the driving spring (18) elongates.
7. The mechanical intercooler bypass valve according to claim 5, characterized in that When the valve (17) opens, the driving spring (18) is compressed.
8. An engine system, characterized in that, Comprising an intercooler and the mechanical intercooler bypass valve according to any one of claims 1-7, wherein the mechanical intercooler bypass valve is arranged at the intake pipe of the intercooler intake port.