Engine exhaust energy recovery system and vehicle

Abstract

This application provides an engine exhaust energy recovery system and a vehicle. The system includes a compressor, a turbine, a generator, and a battery. The turbine inlet is connected to the engine's exhaust manifold, and the turbine outlet is connected to the exhaust pipe. The compressor outlet is connected to the engine's intake manifold. The turbine and compressor are coaxially connected to form a turbocharger. The turbine is also coaxially connected to the generator, and the generator is electrically connected to the battery. When it is determined that the turbocharger does not need to intervene in engine operation, the gas output from the exhaust manifold drives the turbine drive shaft to rotate. The drive shaft drives the generator to rotate coaxially, generating electricity, which is then stored in the battery. By using the turbine to drive the generator to generate electricity and storing it in the battery when it is determined that the turbocharger does not need to intervene in engine operation, the gas that would otherwise be emitted into the atmosphere can be recovered and reused to drive the turbine and then drive the generator to generate electricity, thereby improving the utilization rate of engine exhaust gases.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to an engine exhaust energy recovery system and a vehicle. Background Technology

[0002] The energy utilization of existing engine exhaust is divided into two parts: one part is used for intake boosting of turbocharged engines; the other part is discharged into the atmosphere, and the energy carried by the gas discharged into the atmosphere will be wasted. Summary of the Invention

[0003] This application provides an engine exhaust energy recovery system and a vehicle, which can use engine exhaust to drive a turbine to rotate. The turbine, compressor, generator and drive motor are connected to convert mechanical energy into electrical energy, thereby realizing the recovery and utilization of the gas originally emitted into the atmosphere and reducing energy waste.

[0004] In the first aspect, this application provides an engine exhaust energy recovery system, which includes: a compressor, a turbine, a generator, and a battery; the inlet of the turbine is connected to the exhaust manifold of the engine, the outlet of the turbine is connected to the exhaust pipe, the air inlet of the compressor is connected to the intake manifold of the engine, and the turbine and the compressor are coaxially connected to form a turbocharger; the turbine is also coaxially connected to the generator, and the generator is electrically connected to the battery; when it is determined that the turbocharger does not need to intervene in engine operation, the gas output from the exhaust manifold drives the drive shaft of the turbine to rotate, and the drive shaft drives the generator to coaxially rotate to generate electricity and store it in the battery.

[0005] In one possible implementation, the system further includes a drive motor, the turbine being coaxially connected to the drive motor, the drive motor being electrically connected to the battery, and the drive motor being driven to the compressor.

[0006] In one possible implementation, when it is determined that the supercharger needs to intervene in engine operation and the compressor delivery pressure is not less than a pressure threshold, the gas output from the exhaust manifold drives the drive shaft of the turbine to rotate, and the drive shaft drives the generator to coaxially follow, generate electricity, and store it in the battery.

[0007] In one possible implementation, when it is determined that the supercharger needs to intervene in engine operation, the gas output from the exhaust manifold drives the drive shaft of the turbine to rotate, and the drive shaft drives the compressor to move coaxially to provide supercharging function for the engine.

[0008] In one possible implementation, when it is determined that the supercharger needs to intervene in engine operation and the compressor delivery pressure is less than a pressure threshold, the drive motor is connected to the battery, and the compressor is driven to increase the delivery pressure to a target value, which is not less than the pressure threshold.

[0009] In one possible implementation, the system further includes a first pressure sensor disposed between the compressor's air inlet and the engine's intake manifold, for detecting the compressor's air delivery pressure.

[0010] In one possible implementation, the system further includes a flow control valve connected in parallel across the turbine to form a bypass line;

[0011] When the turbine drives the compressor to provide boost to the engine, if it is determined that the pressure difference between the turbine inlet and outlet is higher than the pressure difference threshold, the flow control valve is controlled to open and the opening degree of the flow control valve is adjusted until the pressure difference between the turbine inlet and outlet is not higher than the pressure difference threshold.

[0012] In one possible implementation, the system further includes a solenoid valve disposed on one side of the flow control valve and in accordance with the on / off state of the flow control valve.

[0013] In one possible implementation, the system further includes a second pressure sensor located at the engine exhaust manifold for detecting the inlet air pressure of the turbine; wherein the pressure difference between the turbine inlet and outlet is the pressure difference between the turbine inlet air pressure and atmospheric pressure.

[0014] Secondly, embodiments of this application also provide a vehicle that may include the engine exhaust energy recovery system provided in the first aspect.

[0015] By adding a generator coaxially connected to the turbine, when it is determined that the turbocharger does not need to intervene in engine operation, the turbine can drive the generator to generate electricity and store it in the battery. This allows the gas that was originally emitted into the atmosphere to be recovered and reused, driving the turbine to work and then driving the generator to generate electricity, thereby improving the utilization rate of engine exhaust gas. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of an engine exhaust energy recovery system provided in one embodiment of this application;

[0018] Figure 2 A schematic diagram of the structure of an engine exhaust energy recovery system provided in another embodiment of this application;

[0019] Figure 3 This is a schematic diagram of a turbine drive operation process provided in one embodiment of this application. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Figure 1 This is a schematic diagram of an engine exhaust energy recovery system provided in one embodiment of this application.

[0022] Reference Figure 1 As shown, the system may include a compressor 101, a turbine 102, a generator 103, and a battery 104.

[0023] The turbine 102 has its inlet connected to the engine's exhaust manifold and its outlet connected to the exhaust pipe. The compressor 101 has its air inlet connected to the engine's intake manifold. The turbine 102 and compressor 101 are coaxially connected to form a turbocharger.

[0024] In some embodiments, a three-way catalytic converter is also provided between the outlet of the turbine 102 and the exhaust pipe.

[0025] In some embodiments, the compressor's air inlet is connected to an air inlet pipe, and the inlet of the air inlet pipe is also provided with an air filter.

[0026] In some embodiments, the turbine 102 is also coaxially connected to the generator 103, and the generator 103 is electrically connected to the battery 104.

[0027] In some embodiments, when it is determined that the turbocharger does not need to intervene in engine operation, the gas output from the exhaust manifold drives the drive shaft of the turbine 102 to rotate. This drive shaft can then drive the generator 103 to generate electricity, which is then stored in the battery 104. Through this control method, gas that would otherwise be discharged into the atmosphere can be input into the turbine 102, driving the turbine 102's drive shaft to rotate, thereby driving the generator 103 to generate electricity. This achieves gas recovery and reuse, improving the utilization rate of engine exhaust gases.

[0028] Figure 2 A schematic diagram of an engine exhaust energy recovery system provided in another embodiment of this application.

[0029] Reference Figure 2 As shown, the system may also include a drive motor 105, a turbine 102 coaxially connected to the drive motor 105, and the drive motor 105 electrically connected to the battery 104. The drive motor 105 is also connected to the compressor drive 101.

[0030] Figure 3 This is a schematic diagram of a turbine drive operation process provided in one embodiment of this application.

[0031] Combination Figure 2 and Figure 3 As shown, in some embodiments, the driving mode of the turbine 102 can be determined by determining whether the turbocharger needs to intervene in engine operation. Specifically, when the turbocharger does not need to intervene in engine operation, i.e., when it does not need to deliver pressurized airflow to the engine via the compressor 101, the turbine 102 can drive the generator 103 to generate electricity, which is then stored in the battery 104.

[0032] When it is determined that the turbocharger needs to intervene in engine operation, it can be further determined whether the compressor 101 delivery pressure is less than the pressure threshold. In one case, when it is determined that the turbocharger needs to intervene in engine operation and the compressor 101 delivery pressure is not less than the pressure threshold, the gas output from the engine's exhaust manifold drives the drive shaft of the turbine 102 to rotate, and then the drive shaft of the turbine 102 drives the generator 103 to coaxially rotate to generate electricity, which is stored in the battery 104.

[0033] In another scenario, when it is determined that the turbocharger needs to intervene in engine operation, the gas output from the engine's exhaust manifold drives the drive shaft of the turbine 102 to rotate. The drive shaft of the turbine 102 then drives the compressor 101 to move coaxially, providing a boost function to the engine.

[0034] In some application scenarios, when it is determined that the turbocharger needs to intervene in the engine operation, and the drive shaft of the turbine 102 is controlled to drive the compressor 101 to provide boost to the engine, if the exhaust gas from the engine exhaust manifold drives the drive shaft of the turbine 102 to rotate, and the boost gas provided by the compressor cannot meet the engine's intake air volume requirements, the drive motor can be used to assist in driving the compressor to work, so that the boost gas output by the compressor 101 can meet the engine's intake air volume requirements.

[0035] In some embodiments, the system may further include a first pressure sensor 106 disposed between the compressor outlet of the compressor 101 and the intake manifold of the engine, for detecting the delivery pressure of the compressor 101.

[0036] In some embodiments, the ability of the compressed gas output by the compressor 101 to meet the engine's intake air volume requirements can be determined by comparing the gas delivery pressure of the compressor 101 with a preset pressure threshold. Specifically, when it is determined that the turbocharger needs to intervene in engine operation and the gas delivery pressure of the compressor 101 is less than the pressure threshold, the drive motor 105 is connected to the battery 04, i.e., the power is turned on. The drive motor 105 can then drive the compressor 101 to increase the gas delivery pressure to the target value, which is not less than the pressure threshold, thereby ensuring that the compressed gas output by the compressor 101 meets the engine's intake air volume requirements.

[0037] Reference Figure 2 As shown, the system may also include a flow control valve 107 connected in parallel across the turbine 102 to form a bypass pipeline.

[0038] In some embodiments, the system may further include a second pressure sensor 108 disposed at the engine exhaust manifold for detecting the inlet air pressure of the turbine 102. The pressure difference between the turbine 102 inlet and outlet can be determined based on the pressure difference between the turbine 102 inlet air pressure and atmospheric pressure.

[0039] In scenarios where the turbocharger does not need to intervene in engine operation and controls the turbine 102 to drive the generator 103 to generate electricity, in order to avoid the problem of excessive air pressure difference between the inlet and outlet of the turbine 102 leading to increased engine fuel consumption, the air pressure difference between the inlet and outlet of the turbine 102 can be monitored in real time during the generator 103's power generation process to see if it is higher than the pressure difference threshold. Specifically, when the turbine 102 drives the compressor to provide boost to the engine, if it is determined that the air pressure difference between the inlet and outlet of the turbine 102 is higher than the pressure difference threshold, the flow control valve 107 is opened and its opening degree is adjusted until the air pressure difference between the inlet and outlet of the turbine is not higher than the pressure difference threshold.

[0040] In some embodiments, the system may further include a solenoid valve 109, disposed on the same side as the flow control valve 107, and whose on / off state is synchronized with that of the flow control valve 107. That is, when the flow control valve 107 is open, the solenoid valve 109 opens synchronously, and when the solenoid valve 109 is closed, the solenoid valve 109 closes synchronously. By providing a solenoid valve 109 on the same side as the flow control valve 107, the airtightness of the bypass pipeline can be improved, and the possibility of air leakage in the bypass pipeline can be reduced.

[0041] In some embodiments, the system may further include a controller for sending control commands to the engine exhaust energy recovery system, thereby controlling the operation of the aforementioned system.

[0042] This application also provides a vehicle that may include the engine exhaust energy recovery system provided in any embodiment of this application.

[0043] It should be noted that the terminals involved in the embodiments of this application may include, but are not limited to, personal computers (PCs), personal digital assistants (PDAs), wireless handheld devices, tablet computers, mobile phones, MP3 players, MP4 players, etc.

[0044] It is understood that the application may be a native application installed on the terminal, or it may be a web application of a browser on the terminal. This application embodiment does not limit this.

[0045] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0046] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0047] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0048] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in a combination of hardware and software functional units.

[0049] The integrated units implemented as software functional units described above can be stored in a computer-readable storage medium. These software functional units, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0050] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An engine exhaust energy recovery system, characterized in that, The system includes: a compressor, a turbine, a generator, and a battery; The turbine inlet is connected to the engine exhaust manifold, the turbine outlet is connected to the exhaust pipe, the compressor outlet is connected to the engine intake manifold, and the turbine and the compressor are coaxially connected to form a turbocharger. The turbine is also coaxially connected to the generator, and the generator is electrically connected to the battery; When it is determined that the turbocharger does not need to intervene in engine operation, the gas output from the exhaust manifold drives the drive shaft of the turbine to rotate, and the drive shaft drives the generator to move coaxially to generate electricity, which is then stored in the battery.

2. The system according to claim 1, characterized in that, The system further includes a drive motor, the turbine is coaxially connected to the drive motor, the drive motor is electrically connected to the battery, and the drive motor is driven to the compressor.

3. The system according to claim 2, characterized in that, When it is determined that the turbocharger needs to intervene in engine operation, and the compressor delivery pressure is not less than the pressure threshold, the gas output from the exhaust manifold drives the turbine drive shaft to rotate, and the drive shaft drives the generator to move coaxially to generate electricity and store it in the battery.

4. The system according to claim 2, characterized in that, When it is determined that the turbocharger needs to intervene in engine operation, the gas output from the exhaust manifold drives the drive shaft of the turbine to rotate, and the drive shaft drives the compressor to move coaxially to provide a boost function for the engine.

5. The system according to claim 4, characterized in that, When it is determined that the turbocharger needs to intervene in engine operation and the compressor delivery pressure is less than the pressure threshold, the drive motor is controlled to connect to the battery and drive the compressor to increase the delivery pressure to the target value, which is not less than the pressure threshold.

6. The system according to claim 3, characterized in that, The system also includes a first pressure sensor, which is disposed between the air inlet of the compressor and the intake manifold of the engine, for detecting the air delivery pressure of the compressor.

7. The system according to claim 4, characterized in that, The system also includes a flow control valve, which is connected in parallel across the turbine to form a bypass pipeline; When the turbine drives the compressor to provide boost to the engine, if it is determined that the pressure difference between the turbine inlet and outlet is higher than the pressure difference threshold, the flow control valve is controlled to open and the opening degree of the flow control valve is adjusted until the pressure difference between the turbine inlet and outlet is not higher than the pressure difference threshold.

8. The system according to claim 7, characterized in that, The system also includes a solenoid valve, which is located on one side of the flow control valve and is in the same on / off state as the flow control valve.

9. The system according to claim 7, characterized in that, The system also includes a second pressure sensor located at the exhaust manifold for detecting the inlet air pressure of the turbine. The pressure difference between the turbine inlet and outlet is the pressure difference between the turbine inlet pressure and atmospheric pressure.

10. A vehicle, characterized in that, The vehicle includes the engine exhaust energy recovery system according to any one of claims 1-9.

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