Device and method for preventing oil leakage of pressure end of supercharger and related device
By configuring an oil leak prevention component in the multi-stage turbocharged engine system and using bypass pipelines and control valves to control intake parameters, the oil leakage problem caused by negative pressure in the low-pressure stage turbocharger is solved, achieving more efficient air compression and power response and reducing production costs.
Patent Information
- Application Number
- CN202511258844.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-04
- Publication Date
- 2025-10-17
AI Technical Summary
In existing two-stage turbocharged engine systems, the high-pressure stage turbocharger turbine rotates before the low-pressure stage turbocharger turbine, causing negative pressure in the intake manifold of the low-pressure stage turbocharger, resulting in lubricating oil leakage and triggering oil leakage faults at the turbocharger pressure end.
The system is equipped with an oil leak prevention component, including a bypass line, control valve, and measuring element. By measuring the intake parameters, the valve opening and closing is controlled to avoid negative pressure and ensure that gas is directly introduced into the high-pressure stage turbocharger when the low-pressure stage turbocharger starts normally, thus preventing oil leakage.
It effectively avoids oil leakage at the pressure end of the low-pressure stage turbocharger, improves the versatility and compression efficiency of the multi-stage turbocharged engine system, reduces production costs, and enhances the engine's output power and power response efficiency.
Smart Images
Figure CN120798516A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of superchargers, in particular to a supercharger pressure end oil leakage prevention device, method and related device. BACKGROUND
[0002] A multi-stage supercharged engine system is an engine system configured with multiple superchargers of different pressure levels. Taking a common two-stage supercharged engine system as an example, a low-pressure stage supercharger and a high-pressure stage supercharger are configured to perform multi-stage supercharging on an air cleaner (hereinafter referred to as an air filter), thereby increasing the intake air volume of the engine and improving the output power of the engine.
[0003] The working principle of the existing two-stage supercharged engine system is that the engine exhaust gas flows through the turbines of the high-pressure stage supercharger and the low-pressure stage supercharger in turn, and the turbine blades rotate the impellers of the corresponding superchargers through the turbine shafts under the impact of the exhaust gas, thereby compressing the gas in the intake pipeline multiple times.
[0004] However, since the turbine of the high-pressure stage supercharger contacts the exhaust gas before the turbine of the low-pressure stage supercharger, the impeller of the high-pressure stage supercharger rotates before the impeller of the low-pressure stage supercharger. At this time, since the high-pressure stage supercharger has started to extract and pressurize air, while the low-pressure stage supercharger has not extracted and pressurized air, a negative pressure is generated in the intake pipeline between the low-pressure stage supercharger and the high-pressure stage supercharger, which causes the lubricating oil used for lubrication in the turbine shaft of the low-pressure stage supercharger to flow out of the intermediate housing of the low-pressure stage supercharger under the low pressure, resulting in a supercharger pressure end oil leakage failure of the low-pressure stage supercharger. SUMMARY
[0005] In view of the above problems, the present application provides a supercharger pressure end oil leakage prevention device, method and related device to avoid the supercharger pressure end oil leakage failure of the low-pressure stage supercharger due to negative pressure. The specific scheme is as follows:
[0006] The first aspect of the present application provides a supercharger pressure end oil leakage prevention device applied to a multi-stage supercharged engine system, wherein the multi-stage supercharged engine system at least includes a group of superchargers, the superchargers at least include a low-pressure stage supercharger, a high-pressure stage supercharger, and an intake pipeline communicating the compressor outlet of the low-pressure stage supercharger and the compressor inlet of the high-pressure stage supercharger, and the supercharger pressure end oil leakage prevention device comprises:
[0007] At least one set of oil leakage prevention components, the oil leakage prevention components are correspondingly configured with the supercharger group, and the oil leakage prevention components comprise a bypass pipeline, a control valve and a first measuring element,
[0008] The intake end of the bypass pipeline is communicated with the air filter outlet of the multi-stage supercharged engine system, the outlet end of the bypass pipeline is communicated with the compressor air inlet of the high-pressure supercharger, the control valve is arranged in the bypass pipeline, and the first measuring element is arranged in the intake pipeline;
[0009] The first measuring element is electrically connected with the control valve;
[0010] The first measuring element is used to collect the intake parameter in the intake pipeline;
[0011] The control valve is used to turn off the bypass pipeline when the intake parameter represents that the low-pressure supercharger is started, and is used to turn on the bypass pipeline when the intake parameter represents that the low-pressure supercharger is not started.
[0012] In a possible implementation, the type of the first measuring element is a pressure sensor or a temperature sensor.
[0013] In a possible implementation, the oil leakage prevention assembly further comprises:
[0014] A second measuring element, the type of the second measuring element is the same as that of the first measuring element, and the second measuring element is arranged in the air filter outlet; the second measuring element is electrically connected with the control valve;
[0015] The second measuring element is used to collect the output gas parameter of the air filter outlet, and is used to assist the control valve in determining whether the intake parameter represents that the low-pressure supercharger is not started based on the output gas parameter and the intake parameter.
[0016] The second aspect of the present application provides a supercharger pressure end oil leakage prevention method, applied to at least one set of oil leakage prevention assemblies in the supercharger pressure end oil leakage prevention device as described in the first aspect of the present application and any one of the implementation manners of the first aspect, the supercharger pressure end oil leakage prevention method comprising:
[0017] Controlling the first measuring element to collect the intake parameter in the intake pipeline;
[0018] Controlling the control valve to turn off the bypass pipeline when the intake parameter represents that the low-pressure supercharger is started;
[0019] Controlling the control valve to turn on the bypass pipeline when the intake parameter represents that the low-pressure supercharger is not started.
[0020] In a possible implementation, the oil leakage prevention assembly further comprises:
[0021] a second measuring element, a type of the second measuring element is same as a type of the first measuring element, the type of the first measuring element is a pressure sensor or a temperature sensor, the second measuring element is disposed in the air filter outlet; the second measuring element is electrically connected with the control valve;
[0022] the second measuring element is used to collect an output gas parameter of the air filter outlet, and is further used to assist the control valve in determining whether the intake gas parameter represents that the low-pressure stage supercharger is not started based on the output gas parameter and the intake gas parameter;
[0023] the oil leakage prevention method of the supercharger pressure end further includes:
[0024] controlling the control valve to determine whether the intake gas parameter represents that the low-pressure stage supercharger is not started based on the intake gas parameter and the output gas parameter.
[0025] In a possible implementation, in a case where the type of the first measuring element is the pressure sensor, the controlling the control valve to determine whether the intake gas parameter represents that the low-pressure stage supercharger is not started based on the intake gas parameter and the output gas parameter includes:
[0026] obtaining the intake gas parameter and the output gas parameter, a type of the intake gas parameter is intake gas pressure, and a type of the output gas parameter is output gas pressure;
[0027] in a case where the intake gas pressure is greater than the output gas pressure, the intake gas parameter represents that the low-pressure stage supercharger is started;
[0028] in a case where the intake gas pressure is not greater than the output gas pressure, the intake gas parameter represents that the low-pressure stage supercharger is not started.
[0029] In a possible implementation, in a case where the type of the first measuring element is the temperature sensor, the controlling the control valve to determine whether the intake gas parameter represents that the low-pressure stage supercharger is not started based on the intake gas parameter and the output gas parameter includes:
[0030] obtaining the intake gas parameter and the output gas parameter, a type of the intake gas parameter is intake gas temperature, and a type of the output gas parameter is output gas temperature;
[0031] in a case where the intake gas temperature is greater than the output gas temperature, the intake gas parameter represents that the low-pressure stage supercharger is started;
[0032] in a case where the intake gas temperature is equal to the output gas temperature, the intake gas parameter represents that the low-pressure stage supercharger is not started.
[0033] The third aspect of the present application provides a multi-stage supercharged engine system, comprising the supercharger pressure end oil leakage prevention device according to the first aspect of the present application and any one of the implementation manners of the first aspect.
[0034] The fourth aspect of the present application provides a vehicle, comprising the multi-stage supercharged engine system according to the third aspect of the present application.
[0035] The fifth aspect of the present application provides an electronic device, comprising at least one processor and a memory connected to the processor, wherein:
[0036] The memory is configured to store a computer program;
[0037] The processor is configured to execute the computer program, so that the electronic device can implement the supercharger pressure end oil leakage prevention method according to the second aspect of the present application and any one of the implementation manners of the second aspect.
[0038] By the above technical solution, the supercharger pressure end oil leakage prevention device, method and related device provided by the present application improve the application universality of the supercharger pressure end oil leakage prevention device provided by the present application to different configurations of multi-stage supercharged engine systems by configuring at least one set of oil leakage prevention components and corresponding configuration of the oil leakage prevention components and the supercharger group. At the same time, by configuring the oil leakage prevention components including a bypass pipeline, a control valve and a first measuring element, the intake end of the bypass pipeline is in communication with the air filter outlet of the multi-stage supercharged engine system, the gas outlet end of the bypass pipeline is in communication with the compressor inlet of the high-pressure supercharger, the control valve is disposed in the bypass pipeline, the first measuring element is disposed in the intake pipeline, and the first measuring element is electrically connected with the control valve, so that without the need for large-scale improvement of each element of the existing multi-stage supercharged engine system, the pressure end oil leakage failure of the low-pressure supercharger caused by negative pressure is avoided, and the production cost is reduced. Subsequently, by configuring the first measuring element to collect the intake parameters in the intake pipeline, and configuring the control valve to conduct the bypass pipeline under the condition that the intake parameters represent that the low-pressure supercharger is not started, the gas output by the air filter outlet is directly introduced into the compressor inlet of the high-pressure supercharger through the bypass pipeline, so that the identification of whether the low-pressure supercharger is started is realized, and the low-pressure supercharger pressure end oil leakage failure caused by negative pressure in the intake pipeline is avoided. Moreover, by configuring the control valve to shut off the bypass pipeline under the condition that the intake parameters represent that the low-pressure supercharger is started, the air is multi-stagedly supercharged by the low-pressure supercharger and the high-pressure supercharger, so as to improve the compression efficiency and further improve the output power and power response efficiency of the engine. It can be seen that the present application improves the application universality of the oil leakage prevention components and reduces the production cost, and avoids the low-pressure supercharger pressure end oil leakage failure caused by negative pressure in the intake pipeline. BRIEF DESCRIPTION OF DRAWINGS
[0039] The above and other features, advantages, and aspects of the present disclosure will become more apparent with reference to the following detailed description when taken in conjunction with the accompanying drawings. Throughout the drawings, like reference numerals are used to represent like elements. It should be understood that the drawings are schematic and elements in the drawings are not necessarily to scale.
[0040] Figure 1 A structure schematic diagram of a two-stage supercharged engine system provided by the present application is shown in the figure;
[0041] Figure 2 A structure schematic diagram of an oil leakage prevention device for a supercharger pressure end provided by the present application is shown in the figure;
[0042] Figure 3 A structure schematic diagram of a three-stage supercharged engine system provided by the present application is shown in the figure;
[0043] Figure 4 A flow chart of an oil leakage prevention method for a supercharger pressure end provided by the present application is shown in the figure;
[0044] Figure 5 A flow chart of another oil leakage prevention method for a supercharger pressure end provided by the present application is shown in the figure;
[0045] Figure 6 A flow chart of another oil leakage prevention method for a supercharger pressure end provided by the present application is shown in the figure;
[0046] Figure 7 A structure schematic diagram of an electronic device provided by the present application is shown in the figure. DETAILED DESCRIPTION
[0047] The embodiments of the present application are described below in conjunction with the accompanying drawings. The terms used in the embodiment part of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.
[0048] The embodiments of the present application are described below in conjunction with the accompanying drawings. It is known to those skilled in the art that, with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.
[0049] The terms "first", "second", and the like, as used in the description and the claims of the application and the preceding drawings, are used for distinguishing between similar objects and are not necessarily used to describe a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for brevity, described in a certain sequence or order. Furthermore, the terms "comprise", "comprising", "include", "including", and the like, as used in the specification are used in their open-ended, non-limiting sense, and that steps recited in the description are not to be construed as being performed in any particular order. The terms "coupled" and "connected" as used in the specification, are used in their normal, broadest possible context.
[0050] For the purpose of understanding, a prior art multi-stage turbocharged engine system is described as follows: Figure 1 As shown in Fig. 1, it is a schematic diagram of a two-stage turbocharged engine system, which comprises an air filter 101, a low-pressure stage turbocharger 102, a high-pressure stage turbocharger 103, an intercooler 104, an engine 105, an exhaust gas heater 106, an exhaust gas flow control valve 107, and pipes connecting the above-mentioned devices. Figure 1 The dashed arrows in Fig. 1 represent the flow direction of ambient air, and the solid arrows represent the flow direction of exhaust gas. The low-pressure stage turbocharger 102 and the high-pressure stage turbocharger 103 are both composed of a turbine 108, an intermediate casing 109, and a compressor 110. The turbine blades in the turbine 108 are connected to the compressor blades in the compressor 110 through a transmission shaft, and the intermediate casing 109 is used to accommodate the transmission shaft and store lubricating liquid for lubricating the transmission shaft. In order to improve the power response rate of the engine, when the engine 105 is started, the engine 105 is usually configured to preferentially direct most of the exhaust gas to the turbine end of the high-pressure stage turbocharger 103. Since the turbine 108 of the high-pressure stage turbocharger 103 has low rotational inertia, it can be rotated by a small amount of exhaust gas at the start, so as to make the high-pressure stage turbocharger 103 work quickly to increase the intake pressure, thereby improving the power response rate of the engine. However, the turbine 108 of the high-pressure stage turbocharger 103 rotates before the turbine 108 of the low-pressure stage turbocharger 102, which causes the compressor 110 of the high-pressure stage turbocharger 103 to rotate before the compressor 110 of the low-pressure stage turbocharger 102. As a result, a negative pressure appears in the pipe between the two compressors 110, and the direction of the negative pressure is shown by the dashed arrows between the two compressors 110 in Fig. 1. At this time, under the action of the negative pressure, the lubricating liquid in the intermediate casing 109 of the low-pressure stage turbocharger 102 flows out of the intermediate casing 109 and enters the compressor 110 of the low-pressure stage turbocharger 102, thereby causing the oil leakage failure at the compression end of the low-pressure stage turbocharger 102.
[0051] The first aspect of the present application provides a booster pressure end oil leakage prevention device, which is applied to a multi-stage supercharged engine system. The multi-stage supercharged engine system at least includes a set of supercharger groups. The supercharger group at least includes a low-pressure stage supercharger 102, a high-pressure stage supercharger 103, and an intake pipeline that connects the compressor outlet of the low-pressure stage supercharger 102 and the compressor inlet of the high-pressure stage supercharger 103, as shown in Figure 2 The booster pressure end oil leakage prevention device includes:
[0052] At least one set of oil leakage prevention components, which are correspondingly arranged with the supercharger groups. The oil leakage prevention components include a bypass pipeline 201, a control valve 202, and a first measuring element 203. The intake end of the bypass pipeline 201 is connected to the air filter 101 outlet of the multi-stage supercharged engine system. The outlet end of the bypass pipeline 201 is connected to the compressor inlet of the high-pressure stage supercharger 103. The control valve 202 is arranged in the bypass pipeline 201. The first measuring element 203 is arranged in the intake pipeline.
[0053] The first measuring element 203 is electrically connected to the control valve 202.
[0054] The first measuring element 203 is used to collect the intake parameters in the intake pipeline.
[0055] The control valve 202 is used to close the bypass pipeline 201 when the intake parameters indicate that the low-pressure stage supercharger 102 is started. The control valve 202 is also used to open the bypass pipeline 201 when the intake parameters indicate that the low-pressure stage supercharger 102 is not started.
[0056] It should be noted that in the actual application scenario, the air filter 101, the low-pressure stage supercharger 102, the high-pressure stage supercharger 103, and their connection relationship in the above Figure 2 are consistent with the connection mode in the two-stage supercharged engine system as shown in Figure 1 .
[0057] It should be noted that in the actual application scenario, the control valve 202 can be a self-control valve, a valve controlled by the first measuring element 203, or a valve controlled by an independent control device such as an engine control unit (ECU) or a vehicle control unit (VCU).
[0058] It should be noted that in the actual application scenario, the first measuring element is a sensor used to collect the gas parameters flowing through the intake pipeline. Since the compressor is a device for compressing air, the compression of air will cause changes in the physical properties of air. Therefore, by configuring the first measuring element 203 to collect the intake parameters in the intake pipeline, the detection of whether the low-pressure stage supercharger 102 is started can be realized.
[0059] It should be noted that in the actual application scenario, since the high-pressure supercharger 103 is started before the low-pressure supercharger 102 after the engine is started, the action of the high-pressure supercharger 103 compressor will cause the air in the intake pipeline to be extracted and negative pressure to be generated in the case that the low-pressure supercharger 102 is not started. Therefore, the application is configured to control the valve 202 to conduct the bypass pipeline 201 in the case that the intake parameter represents that the low-pressure supercharger 102 is not started, so that the gas output from the air filter 101 outlet is directly introduced into the high-pressure supercharger 103 compressor inlet through the bypass pipeline, thereby avoiding the generation of negative pressure in the intake pipeline.
[0060] It should be noted that in the actual application scenario, the intake end of the above-mentioned intake pipeline is communicated with the compressor outlet of the low-pressure supercharger 102, and the gas outlet end of the intake pipeline is communicated with the compressor inlet of the high-pressure supercharger 103. Therefore, the gas outlet end of the above-mentioned bypass pipeline 201 can share the compressor inlet of the high-pressure supercharger 103 with the gas outlet end of the intake pipeline. Specifically, the gas outlet end of the bypass pipeline 201 can bypass the gas outlet end of the intake pipeline, or a three-way valve is arranged at the compressor inlet of the high-pressure supercharger 103, and the gas outlet end of the bypass pipeline 201 and the gas outlet end of the intake pipeline are respectively communicated with two gas inlets of the three-way valve.
[0061] It should be noted that in the actual application scenario, the application is configured to control the valve 202 to close the bypass pipeline 201 in the case that the intake parameter represents that the low-pressure supercharger 102 is started, so as to use the low-pressure supercharger 102 and the high-pressure supercharger 103 to multi-stage pressurize the air input from the air filter outlet to improve the compression efficiency, and further improve the output power and power response efficiency of the engine.
[0062] The application improves the application universality of the oil leakage prevention device of the pressure end of the supercharger to the multi-stage supercharged engine system with different configurations by configuring at least one set of oil leakage prevention assembly and configuring the oil leakage prevention assembly and the supercharger group correspondingly. Meanwhile, by configuring the oil leakage prevention assembly including a bypass pipeline, a control valve and a first measuring element, the air outlet of the air filter is communicated with the air inlet of the pressure end of the low-pressure supercharger, the air outlet of the bypass pipeline is communicated with the air inlet of the pressure end of the high-pressure supercharger, the control valve is arranged in the bypass pipeline, the first measuring element is arranged in the air inlet pipeline, and the first measuring element is electrically connected with the control valve, so that the oil leakage fault of the low-pressure supercharger caused by negative pressure is avoided without large-scale improvement of each element of the existing multi-stage supercharged engine system, and the production cost is reduced. Then, by configuring the first measuring element to collect the air inlet parameter in the air inlet pipeline, the control valve is configured to turn on the bypass pipeline when the air inlet parameter indicates that the low-pressure supercharger is not started, so that the identification of whether the low-pressure supercharger is started is realized, and the gas output by the air outlet of the air filter is directly introduced into the air inlet of the pressure end of the high-pressure supercharger through the bypass pipeline, and the oil leakage fault of the low-pressure supercharger caused by negative pressure in the air inlet pipeline is avoided. Moreover, by configuring the control valve to turn off the bypass pipeline when the air inlet parameter indicates that the low-pressure supercharger is started, the air is multi-staged by the low-pressure supercharger and the high-pressure supercharger, so as to improve the pressure efficiency and the output power and power response efficiency of the engine. It can be seen that the application improves the application universality of the oil leakage prevention assembly and reduces the production cost, and avoids the oil leakage fault of the low-pressure supercharger caused by negative pressure in the air inlet pipeline.
[0063] In a possible implementation, the first measuring element 203 is a pressure sensor or a temperature sensor.
[0064] It should be noted that in the actual application scenario, the physical properties of the gas in the air inlet pipeline change when the low-pressure supercharger 102 is started or the low-pressure supercharger 102 is not started and the high-pressure supercharger 103 is started, and then the air inlet parameter collected by the first measuring element changes. Specifically, when the low-pressure supercharger 102 is started, the pressure end of the low-pressure supercharger 102 compresses the gas output by the air outlet of the air filter 101, and discharges the compressed gas into the air inlet pipeline, at this time, the temperature and pressure of the compressed gas increase. When the low-pressure supercharger 102 is not started and the high-pressure supercharger 103 is started, the temperature and pressure of the gas in the air inlet pipeline decrease due to the extraction of the gas in the air inlet pipeline. Therefore, the application configures the first measuring element 203 to be a pressure sensor or a temperature sensor, so as to collect the air inlet parameter indicating whether the low-pressure supercharger 102 is started.
[0065] In a possible implementation, the oil leakage prevention assembly further includes:
[0066] a second measuring element, which is of the same type as the first measuring element 203, is arranged in the air filter outlet, and is electrically connected to the control valve 202;
[0067] The second measuring element is configured to collect the output gas parameter of the air filter outlet, and is further configured to assist the control valve 202 in determining whether the intake air parameter represents that the low-pressure supercharger 102 is not started based on the output gas parameter and the intake air parameter.
[0068] It should be noted that, in an actual application scenario, since the judgment principle of whether the intake air parameter represents that the low-pressure supercharger 102 is started is to compare the intake air parameter with the ambient air parameter collected by the vehicle ambient sensor, but the air parameter collected by the vehicle ambient sensor is different from the air parameter entering the air filter (for example, the factors such as sunlight shielding and windward area), which causes the risk of delay and precision decline of the action of the control valve. Therefore, the second measuring element is configured, the second measuring element is of the same type as the first measuring element 203, the second measuring element is arranged in the air filter outlet, the second measuring element is electrically connected to the control valve 202, the second measuring element is configured to collect the output gas parameter of the air filter outlet, and is further configured to assist the control valve 202 in determining whether the intake air parameter represents that the low-pressure supercharger 102 is not started based on the output gas parameter and the intake air parameter, thereby improving the control precision of the control valve and shortening the action delay.
[0069] To facilitate the understanding of the supercharger pressure end oil leakage prevention device provided by the first aspect of the present application, a possible implementation of the present application is described in combination with the present application:
[0070] As shown in Figure 3 , it is a structure schematic diagram of a three-stage supercharged engine system. The three-stage supercharged engine system is configured with an A supercharger group, an A oil leakage prevention assembly corresponding to the A supercharger group, a B supercharger group, and a B oil leakage prevention assembly corresponding to the B supercharger group, and in addition to the above device, the three-stage supercharged engine system shown in Figure 3 further includes the air filter 101, the intercooler 104, the engine 105, the exhaust gas heater 106, the exhaust gas flow control valve 107, and the pipeline connecting the above devices in the two-stage supercharged engine system shown in Figure 2 , wherein the A supercharger group includes the first supercharger 102 and the second supercharger 103, the B supercharger group includes the second supercharger 103 and the third supercharger 301, the A oil leakage prevention assembly includes the bypass pipeline 302, the control valve 303, the first measuring element 304, and the second measuring element 305, and the B oil leakage prevention assembly includes the bypass pipeline 306, the control valve 307, the first measuring element 308, and the second measuring element 309.
[0071] It should be noted that in the actual application scenario, the first supercharger 102 in the A supercharger group is the low-pressure stage supercharger 102 in the supercharger pressure end oil leakage prevention device as shown in Figure 2 The second supercharger 103 in the A supercharger group is the high-pressure stage supercharger 103 in the supercharger pressure end oil leakage prevention device as shown in Figure 2 The second supercharger 103 in the A supercharger group is the high-pressure stage supercharger 103 in the supercharger pressure end oil leakage prevention device as shown in
[0072] After the engine 105 of the three-stage supercharged engine system as shown in Figure 3 is started, the engine exhaust gas first passes through the turbine of the third supercharger 301, then passes through the turbine of the second supercharger 103, and finally passes through the turbine of the first supercharger 102. The compressor of the third supercharger 301 starts before the compressor of the second supercharger 103, and the compressor of the second supercharger 103 starts before the compressor of the first supercharger 102. When the compressor of the third supercharger 301 starts, the first measuring element 308 of the B oil leakage prevention assembly collects the first intake parameter in the second intake pipeline, the second measuring element 309 of the B oil leakage prevention assembly collects the first output gas parameter at the outlet of the air filter 101, and the control valve 307 is configured to determine that the first intake parameter represents the case that the second supercharger 103 is not started based on the first output gas parameter and the first intake parameter, and to turn on the bypass pipeline 306 of the B oil leakage prevention assembly. Wherein the second intake pipeline is a pipeline connecting the compressor inlet of the third supercharger 301 and the compressor outlet of the second supercharger 103. After that, when the control valve 307 determines that the first intake parameter represents the case that the second supercharger 103 is started based on the first output gas parameter and the first intake parameter, the bypass pipeline 306 of the B oil leakage prevention assembly is turned off. Subsequently, when the compressor of the second supercharger 103 starts, the first measuring element 304 of the A oil leakage prevention assembly collects the second intake parameter in the first intake pipeline, the second measuring element 305 of the A oil leakage prevention assembly collects the second output gas parameter at the outlet of the air filter 101, and the control valve 303 is configured to determine that the second intake parameter represents the case that the first supercharger 102 is not started based on the second output gas parameter and the second intake parameter, and to turn on the bypass pipeline 302 of the A oil leakage prevention assembly. After that, when the control valve 303 determines that the second intake parameter represents the case that the first supercharger 102 is started based on the second output gas parameter and the second intake parameter, the bypass pipeline 302 of the A oil leakage prevention assembly is turned off. At this point, the three-stage supercharged engine system as shown in Figure 3 is started.
[0073] In a possible implementation, the A oil leakage prevention assembly and the B oil leakage prevention assembly can share one second measurement element (the second measurement element 309 or the second measurement element 305).
[0074] It should be noted that in actual application scenarios, for other multi-stage supercharged engine systems, a plurality of oil leakage prevention assemblies can also be configured in the three-stage supercharged engine system as shown in the above Figure 3 The present application does not make redundant description here.
[0075] The second aspect of the present application provides a supercharger pressure end oil leakage prevention method, which is applied to at least one set of oil leakage prevention assemblies in the supercharger pressure end oil leakage prevention device of the first aspect and any implementation manner of the first aspect of the present application, as shown in the above Figure 4 The supercharger pressure end oil leakage prevention method comprises the following steps.
[0076] S401, control the first measurement element to collect the intake air parameter in the intake air pipeline;
[0077] S402, control the control valve to shut off the bypass pipeline in the case that the intake air parameter indicates that the low-pressure stage supercharger is started;
[0078] S403, control the control valve to turn on the bypass pipeline in the case that the intake air parameter indicates that the low-pressure stage supercharger is not started.
[0079] In a possible implementation, the first measurement element in the above step S401 can be a sensor with control function, which can control itself to collect the intake air parameter in the intake air pipeline, and can also control the control valve to shut off or turn on the bypass pipeline.
[0080] In a possible implementation, the control valve in the above step S401 can be a valve with control function, which can control the first measurement element to collect and feed back the intake air parameter in the intake air pipeline, and can also control itself to shut off or turn on the bypass pipeline based on the intake air parameter.
[0081] In a possible implementation, the supercharger pressure end oil leakage prevention method provided by the second aspect of the present application can also be applied to a controller in a multi-stage supercharged engine system, or a controller for controlling the oil leakage prevention assembly.
[0082] In a possible implementation, the judgment method of whether the intake air parameter indicates that the low-pressure stage supercharger is started can comprise the following steps A1 to A2.
[0083] Step A1, obtain the ambient air parameter collected by the vehicle ambient sensor, and trigger step A2.
[0084] Step A2, calculate the difference between the ambient air parameter and the intake air parameter, and trigger step A3.
[0085] Step A3, determining whether the difference obtained in step A2 is within a preset interval adapted to the ambient air parameter obtained in step A1. If yes, triggering step A4, if not, triggering step A5.
[0086] In a possible implementation, the preset interval in step A3 can be a calibration interval of the difference between the intake air parameter in the intake pipeline after the start of the low-pressure supercharger and the ambient air parameter under different ambient air parameter conditions.
[0087] Step A4, the output content is that the intake air parameter represents the result of the start of the low-pressure supercharger.
[0088] Step A5, the output content is that the intake air parameter represents the result of the non-start of the low-pressure supercharger.
[0089] In a possible implementation, the above-mentioned oil leakage prevention assembly further comprises:
[0090] The second measuring element is of the same type as the first measuring element, and the type of the first measuring element is a pressure sensor or a temperature sensor. The second measuring element is arranged in the air filter outlet. The second measuring element is electrically connected to the control valve.
[0091] The second measuring element is used to collect the output gas parameter of the air filter outlet, and is also used to assist the control valve in determining whether the intake air parameter represents the non-start of the low-pressure supercharger based on the output gas parameter and the intake air parameter.
[0092] The second aspect of the present application provides a method for preventing oil leakage at the pressure end of the supercharger, which further comprises:
[0093] The control valve is controlled to determine whether the intake air parameter represents the non-start of the low-pressure supercharger based on the intake air parameter and the output gas parameter.
[0094] It should be noted that in actual application scenarios, due to the difference between the ambient air parameter and the actual output gas parameter of the air filter under the influence of external environment (such as light, wind speed, etc.), the control accuracy and control timeliness are affected. Therefore, the present application controls the control valve to determine whether the intake air parameter represents the non-start of the low-pressure supercharger based on the intake air parameter and the output gas parameter, directly uses the output gas parameter in the air filter outlet to determine whether the intake air parameter represents the non-start of the low-pressure supercharger, and improves the control accuracy and control timeliness.
[0095] In a possible implementation, in the case where the type of the first measuring element is a pressure sensor, the control valve is controlled to determine whether the intake air parameter represents the non-start of the low-pressure supercharger based on the intake air parameter and the output gas parameter, comprising:
[0096] obtaining the intake parameter and the output gas parameter, the type of the intake parameter being intake pressure, the type of the output gas parameter being output gas pressure;
[0097] in the case that the intake pressure is greater than the output gas pressure, the intake parameter characterizing that the low-pressure stage supercharger is started up;
[0098] in the case that the intake pressure is not greater than the output gas pressure, the intake parameter characterizing that the low-pressure stage supercharger is not started up.
[0099] in a possible implementation, in the case that the type of the first measuring element is a temperature sensor, the control of the control valve determining whether the intake parameter characterizes that the low-pressure stage supercharger is not started up based on the intake parameter and the output gas parameter comprises:
[0100] obtaining the intake parameter and the output gas parameter, the type of the intake parameter being intake temperature, the type of the output gas parameter being output gas temperature;
[0101] in the case that the intake temperature is greater than the output gas temperature, the intake parameter characterizing that the low-pressure stage supercharger is started up;
[0102] in the case that the intake temperature is equal to the output gas temperature, the intake parameter characterizing that the low-pressure stage supercharger is not started up.
[0103] It should be noted that in the case that the type of the first measuring element is different, the control mode of the supercharger pressure end oil leakage prevention method provided in the second aspect of the present application is different, which will be described in combination with the two implementations of the present application:
[0104] Mode one: in the case that the type of the first measuring element is a temperature sensor, the flow chart of the supercharger pressure end oil leakage prevention method is as shown in Figure 5 , and the specific operation steps include steps S501 to S506.
[0105] Step S501, obtaining the intake temperature collected by the first measuring element and the output gas temperature collected by the second measuring element, and triggering step S502.
[0106] Step S502, determining whether the intake temperature is equal to the output gas temperature. If yes, triggering step S503, and if no, triggering step S504.
[0107] Step S503, controlling the control valve to turn on the bypass pipeline.
[0108] Step S504, determining whether the intake temperature is greater than the output gas temperature. If yes, triggering step S505, and if no, triggering step S506.
[0109] Step S505, controlling the control valve to turn off the bypass pipeline.
[0110] Step S506, outputting prompt information that the intake air temperature is abnormal.
[0111] In a possible implementation, in the absence of element failure, the intake air temperature in the intake air pipeline is generally not less than the output gas temperature output by the air filter. However, in the case of failure such as refrigerant leakage of the intercooler, the intake air temperature is less than the output gas temperature due to the inflow of the leaked refrigerant into the intake air pipeline. Therefore, the present application outputs prompt information that the intake air temperature is abnormal to prompt the user to check in the case that the intake air temperature is less than the output gas temperature, thereby avoiding the risk of engine output power reduction or power response rate reduction due to the excessively low temperature of the gas entering the engine.
[0112] Method two: in the case that the type of the first measurement element is a pressure sensor, the flowchart of the oil leakage prevention method of the supercharger pressure end is as shown in Figure 6 The specific operation steps include steps S601 to S604.
[0113] Step S601, obtaining the intake air pressure collected by the first measurement element and the output gas pressure collected by the second measurement element, and triggering step S602.
[0114] Step S602, determining whether the intake air pressure is greater than the output gas pressure. If yes, triggering step S603, and if no, triggering step S604.
[0115] Step S603, controlling the control valve to shut off the bypass pipeline.
[0116] Step S604, controlling the control valve to turn on the bypass pipeline.
[0117] The third aspect of the present application provides a multi-stage supercharged engine system, including the supercharger pressure end oil leakage prevention device according to the first aspect of the present application and any one of the implementation manners of the first aspect.
[0118] The fourth aspect of the present application provides a vehicle, including the multi-stage supercharged engine system according to the third aspect of the present application.
[0119] The fifth aspect of the present application provides an electronic device, including at least one processor and a memory connected with the processor, wherein:
[0120] The memory is configured to store a computer program;
[0121] The processor is configured to execute the computer program, so that the electronic device can implement the supercharger pressure end oil leakage prevention method according to the second aspect of the present application and any one of the implementation manners of the second aspect.
[0122] The structural schematic diagram of the electronic device provided by the fifth aspect of the present application is as shown in Figure 7The electronic device can be a server, a PC, a PAD, a mobile phone, an ECU (Electronic Control Unit), a VCU (Vehicle Control Unit), an MCU (Micro Controller Unit), an HCU (Hybrid Control Unit), etc. Figure 7 The electronic device shown is merely an example and should not impose any limitation on the functions and use range of the embodiments of the present application.
[0123] As shown in Figure 7 The electronic device can include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 701 that can perform various appropriate actions and processes according to programs stored in a read-only memory (ROM) 702 or loaded from a storage device 708 into a random access memory (RAM) 703. In a state where the electronic device is powered on, the RAM 703 also stores various programs and data required for operation of the electronic device. The processing device 701, the ROM 702, and the RAM 703 are connected to each other through a bus 704. An input / output (I / O) interface 705 is also connected to the bus 704.
[0124] Generally, the following devices can be connected to the I / O interface 705: an input device 706 including, for example, a temperature sensor, a pressure sensor, a touch screen, a touch pad, etc.; an output device 707 including, for example, a control valve, a temperature sensor, a pressure sensor, etc.; a storage device 708 including, for example, a memory card, a hard disk, etc.; and a communication device 709. The communication device 709 can allow the electronic device to communicate wirelessly or by wire with other devices to exchange data. Although Figure 7 The electronic device is shown as having various devices, but it should be understood that all of the shown devices are not required to be implemented or possessed. More or fewer devices can alternatively be implemented or possessed.
[0125] The embodiments of the present application also provide a computer program product including computer readable instructions, which, when executed on an electronic device, cause the electronic device to implement any of the supercharger pressure end oil leakage prevention methods provided by the embodiments of the present application.
[0126] The embodiments of the present application also provide a computer readable storage medium carrying one or more computer programs, which, when executed by an electronic device, can cause the electronic device to implement any of the supercharger pressure end oil leakage prevention methods provided by the embodiments of the present application.
[0127] In addition, it should be noted that the apparatus embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment. In addition, the connection relationship between the modules in the apparatus embodiments provided in the present application indicates that there is a communication connection between them, which can be implemented as one or more communication buses or signal lines.
[0128] Through the description of the above embodiments, those skilled in the art can clearly understand that the present application can be realized by means of software and the necessary universal hardware, and of course can also be realized by special hardware including special integrated circuits, special CPUs, special memories, special components and the like. Generally, functions completed by computer programs can be easily realized by corresponding hardware, and the specific hardware structure for realizing the same function can also be various, such as analog circuit, digital circuit or special circuit. However, for the present application, software program implementation is a better embodiment. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products, which are stored in readable storage media, such as computer floppy disks, U disks, mobile hard disks, ROM, RAM, magnetic or optical disks, etc., including a plurality of instructions for making a computer device (which can be a personal computer, a training device, or a network device, etc.) execute the methods described in various embodiments of the present application.
[0129] In the above embodiments, all or part can be realized by software, hardware, firmware or any combination thereof. When realized by software, it can be realized in the form of a computer program product in whole or in part.
[0130] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from one website, computer, training device or data center to another website, computer, training device or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be stored by the computer or a data storage device such as a training device, a data center, etc. integrated with one or more available media sets. The available media can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)), etc.
Claims
1. A supercharger pressure end anti-oil leakage device, characterized in that: Applicable to a multi-stage supercharged engine system, the multi-stage supercharged engine system includes at least one supercharger group, the supercharger group includes at least one low-pressure stage supercharger, one high-pressure stage supercharger, and an intake pipe connecting the compressor outlet of the low-pressure stage supercharger and the compressor inlet of the high-pressure stage supercharger, the supercharger pressure end anti-leakage device includes: At least one set of oil leakage prevention components, the oil leakage prevention components are configured correspondingly to the supercharger group, and the oil leakage prevention components include: a bypass line, a control valve and a first measuring element, The air inlet end of the bypass line is communicated with the air filter outlet of the multi-stage supercharged engine system, and the air outlet end of the bypass line is communicated with the compressor inlet of the high-pressure stage supercharger. The control valve is disposed in the bypass line, and the first measuring element is disposed in the air inlet line. The first measuring element is electrically connected to the control valve; The first measuring element is used to collect intake parameters in the intake pipe; The control valve is used to close the bypass line when the intake parameters indicate that the low-pressure stage supercharger is started, and is also used to open the bypass line when the intake parameters indicate that the low-pressure stage supercharger is not started.
2. The supercharger pressure end oil leakage prevention device according to claim 1, characterized in that: The first measuring element is a pressure sensor or a temperature sensor.
3. The supercharger pressure end oil leakage prevention device according to claim 2, characterized in that: The oil leakage prevention component also includes: a second measuring element, the type of the second measuring element being the same as that of the first measuring element, the second measuring element being disposed in the air filter outlet; the second measuring element being electrically connected to the control valve; The second measuring element is used to collect output gas parameters of the air filter outlet, and is also used to assist the control valve in determining whether the intake parameters indicate that the low-pressure stage supercharger is not started based on the output gas parameters and the intake parameters.
4. A method for preventing oil leakage at the pressure end of a supercharger, characterized in that: At least one set of anti-oil leakage components used in a supercharger pressure end anti-oil leakage device according to any one of claims 1 to 3, the supercharger pressure end anti-oil leakage method comprising: controlling the first measuring element to collect intake air parameters in the intake pipe; controlling the control valve to close the bypass line when the intake air parameter indicates that the low-pressure stage supercharger is started; The control valve is controlled to open the bypass line when the intake parameter indicates that the low-pressure stage supercharger is not started.
5. The method for preventing oil leakage at the pressure end of a supercharger according to claim 4, characterized in that: The oil leakage prevention component also includes: a second measuring element, the type of the second measuring element being the same as that of the first measuring element, the type of the first measuring element being a pressure sensor or a temperature sensor, the second measuring element being disposed in an air filter outlet; the second measuring element being electrically connected to the control valve; The second measuring element is used to collect output gas parameters of the air filter outlet, and is also used to assist the control valve in determining, based on the output gas parameters and the intake parameters, whether the intake parameters indicate that the low-pressure stage supercharger is not started; The method for preventing oil leakage at the pressure end of the supercharger further includes: The control valve is controlled to determine whether the intake air parameter indicates that the low-pressure stage supercharger is not activated based on the intake air parameter and the output gas parameter.
6. The method for preventing oil leakage at the pressure end of a supercharger according to claim 5, characterized in that: In a case where the type of the first measuring element is the pressure sensor, controlling the control valve to determine whether the intake air parameter indicates that the low-pressure stage supercharger is not started based on the intake air parameter and the output gas parameter includes: Obtaining the intake gas parameter and the output gas parameter, wherein the type of the intake gas parameter is intake pressure, and the type of the output gas parameter is output gas pressure; In the case where the intake pressure is greater than the output gas pressure, the intake parameter indicates that the low-pressure stage supercharger is activated; When the intake air pressure is not greater than the output gas pressure, the intake air parameter indicates that the low-pressure stage supercharger is not started.
7. The method for preventing oil leakage at the pressure end of a supercharger according to claim 5, characterized in that: In a case where the type of the first measuring element is the temperature sensor, controlling the control valve to determine whether the intake air parameter indicates that the low-pressure stage supercharger is not started based on the intake air parameter and the output gas parameter includes: Obtaining the intake air parameter and the output gas parameter, wherein the type of the intake air parameter is intake air temperature, and the type of the output gas parameter is output gas temperature; In the case where the intake air temperature is greater than the output gas temperature, the intake air parameter indicates that the low-pressure stage supercharger is activated; When the intake air temperature is equal to the output gas temperature, the intake air parameter indicates that the low-pressure stage supercharger is not started.
8. A multi-stage supercharged engine system, characterized in that: include: The supercharger pressure end oil leakage prevention device according to any one of claims 1 to 3.
9. A vehicle, characterized in that: include: The multi-stage supercharged engine system according to claim 8.
10. An electronic device, characterized in that: comprising at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is configured to execute the computer program so that the electronic device can implement the method for preventing oil leakage at the pressure end of a supercharger according to any one of claims 4 to 7.