An emission reduction device for increasing engine exhaust temperature

Abstract

The application provides an engine exhaust temperature improving emission reduction device, and relates to the technical field of internal combustion engines.The engine exhaust temperature improving emission reduction device comprises a middle cooler three-way valve, a compressor, an engine, a turbine, an exhaust gas recirculation three-way valve and a control unit; a first inlet of the middle cooler three-way valve is connected with the compressor through an air intake manifold, and a first outlet of the middle cooler three-way valve is connected with the engine through a pre-middle cooling air inlet pipe; the engine is connected with the turbine through an exhaust pipe; a second inlet of the exhaust gas recirculation three-way valve is connected with the exhaust pipe, and a second outlet of the exhaust gas recirculation three-way valve is connected with the pre-middle cooling air inlet pipe through a pre-middle cooling exhaust gas bypass pipe; an air temperature sensor is arranged on the air intake manifold; and the control unit is connected with the middle cooler three-way valve and the exhaust gas recirculation three-way valve respectively.Through controlling the flow paths of air and exhaust gas, the air temperature entering the combustion chamber is improved when the engine is cold started, complete combustion of fuel is promoted, and the problem of excessive emission is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of internal combustion engines, and in particular to an emission reduction device for increasing engine exhaust temperature. BACKGROUND

[0002] Engine exhaust temperature increase refers to the rise of engine exhaust temperature. Increasing the exhaust temperature can increase the thermal efficiency of the engine. Increasing the exhaust temperature can also optimize the combustion process of the engine fuel, thereby reducing emissions and improving the combustion efficiency of the fuel.

[0003] In the prior art, engine exhaust temperature increase is usually achieved through supercharging. During the intake process of the engine, air is first compressed and then enters the intercooler, which cools the air to increase its density. The cooled high-density air enters the combustion chamber of the engine, mixes well with the fuel, and achieves a high-efficiency combustion process. Supercharging helps to increase the combustion temperature, thereby improving the combustion efficiency of the fuel and the overall performance of the engine.

[0004] However, the prior art has the problem of emission exceeding the standard during cold start. Cold start refers to the start of the engine after a long period of shutdown, especially in low ambient temperature conditions. In this case, the air temperature is low, and the air temperature is further reduced by the intercooler before entering the engine, resulting in lower air temperature entering the engine. Under low temperature conditions, the mixture of fuel and air is not uniform, which may cause incomplete combustion of fuel in the engine combustion chamber. This incomplete combustion increases the unburned hydrocarbons and carbon monoxide in the emissions, resulting in emissions exceeding the standard. SUMMARY

[0005] The present application provides an emission reduction device for increasing engine exhaust temperature to solve the problem of emission exceeding the standard in the prior art.

[0006] In a first aspect, the present application provides an emission reduction device for increasing engine exhaust temperature, comprising: an intercooler three-way valve, a compressor, an engine, a turbine, an exhaust gas recirculation three-way valve, and a control unit.

[0007] The first inlet of the intercooler three-way valve is connected to the compressor through an intake manifold, and the first outlet of the intercooler three-way valve is connected to the engine through an intercooled pre-intake pipe. The intake manifold is used to transmit air output by the compressor to the intercooler three-way valve.

[0008] The engine is connected to the turbine through an exhaust manifold, and the exhaust manifold is used to transmit exhaust gas output by the engine to the turbine.

[0009] The second inlet of the exhaust gas recirculation three-way valve is connected to the exhaust manifold, and the second outlet of the exhaust gas recirculation three-way valve is connected to the intercooled pre-intake pipe through an intercooled pre-exhaust gas bypass pipe.

[0010] The air temperature sensor is arranged on the air intake manifold and used to detect the air temperature;

[0011] The control unit is connected with the intercooler three-way valve and the exhaust gas recirculation three-way valve through wires, and is used to control the opening and closing of the first outlet and the second outlet;

[0012] When the air temperature is lower than a preset first temperature value, the control unit is used to control the first outlet and the second outlet to be opened, the intercooled pre-air intake pipe is used to transmit the air to the engine when the first outlet is opened, and the intercooled pre-exhaust gas bypass pipe is used to transmit the preset volume of exhaust gas in the exhaust manifold to the intercooled pre-air intake pipe when the second outlet is opened.

[0013] In a possible design, the engine exhaust temperature increasing emission reduction device further comprises a first intercooler and a second intercooler;

[0014] The first intercooler is arranged on an intercooled post-air intake pipe, the third outlet of the intercooler three-way valve is connected with the engine through the intercooled post-air intake pipe, the first intercooler is used to cool the air, and the intercooled post-air intake pipe is used to transmit the air to the first intercooler and transmit the cooled air to the engine;

[0015] The second intercooler is arranged on an intercooled post-exhaust gas bypass pipe, the fourth outlet of the exhaust gas recirculation three-way valve is connected with the intercooled pre-air intake pipe through the intercooled post-exhaust gas bypass pipe, the second intercooler is used to cool the preset volume of exhaust gas, and the intercooled post-exhaust gas bypass pipe is used to transmit the preset volume of exhaust gas to the second intercooler and transmit the cooled preset volume of exhaust gas to the intercooled pre-air intake pipe.

[0016] In a possible design, the engine is provided with a rotating speed sensor, and the rotating speed sensor is used to detect the rotating speed of the engine;

[0017] The control unit is used to control the third outlet to be opened, so that the air enters the engine through the intercooled post-air intake pipe;

[0018] When the rotating speed is lower than a preset rotating speed value, the control unit is further used to control the fourth outlet to be opened, so that the preset volume of exhaust gas enters the intercooled pre-air intake pipe through the intercooled post-exhaust gas bypass pipe, and the intercooled pre-air intake pipe is further used to transmit the cooled preset volume of exhaust gas to the engine.

[0019] In a possible design, the engine exhaust temperature increasing emission reduction device further comprises an exhaust temperature sensor;

[0020] The exhaust temperature sensor is arranged on the exhaust manifold, and is configured to detect an exhaust temperature, which is used to represent a combustion efficiency of fuel in the engine.

[0021] When the exhaust temperature is higher than a preset second temperature value, the control unit is configured to control the third outlet and the fourth outlet to be opened, and the air enters the engine through the intercooled intake pipe when the third outlet is opened, and the preset volume of exhaust gas enters the pre-intercooled intake pipe through the intercooled exhaust bypass pipe when the fourth outlet is opened.

[0022] In a possible design, the engine exhaust temperature increasing emission reduction device further comprises a particulate filter.

[0023] The particulate filter is arranged on the exhaust manifold, and is configured to collect particulate matters in the exhaust gas.

[0024] In a possible design, the particulate filter is provided with a concentration sensor, and the concentration sensor is configured to detect a concentration of the particulate matters in the exhaust gas.

[0025] When the concentration of the particulate matters is higher than a preset concentration value, the control unit is configured to control the third outlet to be opened, so that the air enters the engine through the intercooled intake pipe.

[0026] In a possible design, the control unit is provided with a wireless communicator, and the control unit is further configured to receive the air temperature sent by the air temperature sensor, the exhaust temperature sent by the exhaust temperature sensor, and the concentration of the particulate matters sent by the concentration sensor, and send the intake temperature, the exhaust temperature and the concentration of the particulate matters to an external device, and the external device is configured to receive and monitor the intake temperature, the exhaust temperature and the concentration of the particulate matters.

[0027] In a possible design, the first intercooler and the second intercooler are both water-cooled intercoolers.

[0028] In a possible design, the engine exhaust temperature increasing emission reduction device further comprises a transmission shaft.

[0029] The compressor is connected to the turbine through the transmission shaft, the exhaust gas is configured to drive the turbine to rotate, the turbine is configured to drive the transmission shaft to rotate, and the transmission shaft is configured to drive the compressor to compress the air.

[0030] In a possible design, the intake manifold is provided with a throttle valve, and the throttle valve is configured to control the flow of the air.

[0031] The application provides an engine exhaust temperature increasing emission reduction device, which comprises a intercooler three-way valve, a compressor, an engine, a turbine, an exhaust gas recirculation three-way valve and a control unit; a first inlet of the intercooler three-way valve is connected with the compressor through an air intake manifold, a first outlet of the intercooler three-way valve is connected with the engine through a pre-intercooler air intake pipe, and the air intake manifold is used for transmitting air output by the compressor to the intercooler three-way valve; the engine is connected with the turbine through an exhaust pipe, the exhaust pipe is used for transmitting exhaust gas output by the engine to the turbine; a second inlet of the exhaust gas recirculation three-way valve is connected with the exhaust pipe, and a second outlet of the exhaust gas recirculation three-way valve is connected with the pre-intercooler air intake pipe through a pre-intercooler exhaust gas bypass pipe; an air temperature sensor for detecting air temperature is arranged on the air intake manifold; the control unit is connected with the intercooler three-way valve and the exhaust gas recirculation three-way valve through wires respectively, and the control unit is used for controlling opening and closing of the first outlet and the second outlet; when the air temperature is lower than a preset first temperature value, the control unit is used for controlling the first outlet and the second outlet to be opened, when the first outlet is opened, the pre-intercooler air intake pipe is used for transmitting the air to the engine, and when the second outlet is opened, the pre-intercooler exhaust gas bypass pipe is used for transmitting exhaust gas of a preset volume in the exhaust pipe to the pre-intercooler air intake pipe. The engine exhaust temperature increasing emission reduction device provided by the application utilizes cooperation of the intercooler three-way valve and the exhaust gas recirculation three-way valve, when the air temperature is lower than a preset value, the control unit simultaneously opens the first outlet of the intercooler three-way valve and the second outlet of the exhaust gas recirculation three-way valve. This operation allows air not cooled by the intercooler and exhaust gas of a certain volume to directly enter the air intake pipe of the engine. By introducing exhaust gas recirculation, the high-temperature characteristics of the exhaust gas increase the air temperature entering the engine, thereby improving the mixing efficiency of fuel and air and promoting sufficient combustion of the fuel. The combustion efficiency and the engine performance are improved, and the effect of reducing emissions is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0033] Figure 1 The structure of the engine exhaust temperature increasing emission reduction device provided by the embodiments of the application Figure One ;

[0034] Figure 2Structure of the emission reduction device for engine exhaust temperature increase provided by the embodiment of the present application Figure Two .

[0035] Explanation of reference numerals:

[0036] 100 - intercooler three-way valve

[0037] 200 - compressor

[0038] 300 - engine

[0039] 400 - turbine

[0040] 500 - exhaust gas recirculation three-way valve

[0041] 600 - control unit

[0042] 6001 - wireless communicator

[0043] 700 - intake manifold

[0044] 7001 - air temperature sensor

[0045] 7002 - throttle valve

[0046] 800 - pre-intercooler intake pipe

[0047] 900 - exhaust manifold

[0048] 1000 - pre-intercooler exhaust bypass pipe

[0049] 1100 - first intercooler

[0050] 1200 - second intercooler

[0051] 1300 - post-intercooler intake pipe

[0052] 1400 - post-intercooler exhaust bypass pipe

[0053] 1500 - rotation speed sensor

[0054] 1600 - exhaust gas temperature sensor

[0055] 1700 - particulate filter

[0056] 1701 - concentration sensor

[0057] 1800 - drive shaft DETAILED DESCRIPTION

[0058] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, like reference numerals refer to like elements, unless the context clearly dictates otherwise. The following description of exemplary embodiments is not representative of all possible embodiments consistent with the present application. Instead, it is merely intended to be a description of some embodiments consistent with aspects of the present application as detailed in the appended claims.

[0059] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish between the same or similar items or components that have substantially the same function and effect. For example, the first chip and the second chip are merely used to distinguish between different chips and do not limit the order of execution. Those skilled in the art can understand that the terms "first", "second", etc. do not limit the number and execution order, and the terms "first", "second", etc. do not necessarily mean different. It should be noted that the words "exemplary" or "for example" in the embodiments of the present application are used to represent an example, illustration or description. Any embodiment or design scheme described as "exemplary" or "for example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of the words "exemplary" or "for example" is intended to present the relevant concept in a specific manner. In the embodiments of the present application, "at least one" means one or more, and "multiple" means two or more.

[0060] It should be noted that "at the time" in the embodiments of the present application can be at the moment when a certain condition occurs, or within a certain period of time after the occurrence of a certain condition, which is not limited in the embodiments of the present application. In addition, the engine exhaust temperature increasing emission reduction device provided in the embodiments of the present application is only an example, and the engine exhaust temperature increasing emission reduction device can include more or less content.

[0061] In order to clearly describe the technical solutions of the embodiments of the present application, the following briefly introduces some terms and technologies involved in the embodiments of the present application:

[0062] Engine exhaust temperature: refers to the temperature of the exhaust gas in the engine exhaust system, and is one of the important parameters for evaluating the running state and performance of the engine. The exhaust temperature can reflect the efficiency of the combustion process, the combustion state of the fuel and the health status of the exhaust system. Too high exhaust temperature may indicate incomplete combustion, excessive load or cooling system failure, while too low exhaust temperature may mean low combustion efficiency.

[0063] Emission reduction device: is a device used to reduce harmful emissions from engines or industrial processes, aiming to reduce pollution to the environment and harm to human health. These devices treat emissions through chemical or physical methods to reduce the emission of pollutants such as nitrogen oxides, hydrocarbons, carbon monoxide and particulate matter.

[0064] Three-way valve: A fluid control device with three connection ports, used to change the fluid flow path or distribute fluids. It can achieve different flow patterns by adjusting the position of the valve core, such as directing fluid from one inlet to one of the two outlets, or switching the fluid flow between two inlets. Three-way valves are widely used in heating, ventilation, air conditioning systems, and industrial processes to improve system flexibility and efficiency.

[0065] Compressor: A mechanical device used to increase the pressure and kinetic energy of a gas by reducing its volume or increasing its flow rate. It achieves this by rotating the blades or the movement of the pistons, compressing the gas from a low-pressure area to a high-pressure area.

[0066] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, the same numbers are used to designate the same elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of devices and methods consistent with some aspects of the present invention, as detailed in the appended claims.

[0067] The technical solutions of the present application will be described in detail below with specific examples. The following specific examples can be combined with each other, and the same or similar concepts or processes may not be described again in some examples. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0068] In order to clearly understand the technical solutions of the present application, the prior art solutions will be described in detail first. The increase of engine exhaust temperature refers to the phenomenon of the increase of the temperature of the exhaust gas emitted by the engine, which usually reflects the change of the engine operating state or working condition. The increase of engine exhaust temperature in the prior art is usually used to improve the performance and emission efficiency of the engine in low temperature environment. By adjusting the air flow in the exhaust system, the exhaust temperature is increased to accelerate the warming up of the catalytic converter, thereby improving its efficiency. The specific method may include the use of variable exhaust valves, thermal management materials or electric heating elements to ensure that the engine quickly reaches the working temperature during startup and low load operation.

[0069] However, the prior art engine exhaust temperature increase has the problem of emission exceeding the standard during cold start. After the engine has been stopped for a long time, especially when it is started in low temperature environment, the air temperature entering the engine is low. This is because the air has been further cooled by the intercooler before entering the engine. Under such low temperature conditions, the mixture of fuel and air becomes uneven, resulting in incomplete combustion of fuel in the combustion chamber. This incomplete combustion increases the content of unburned hydrocarbons and carbon monoxide in the emissions, resulting in the phenomenon of emission exceeding the standard.

[0070] Therefore, to address the issue of excessive emissions during cold start due to increased engine exhaust temperature, it was found that optimizing engine intake methods or using catalytic converters can improve fuel-air mixing efficiency and combustion completeness. ① The timing and amount of fuel injection can be adjusted to improve fuel-air mixing uniformity and thus improve combustion efficiency. ② The engine intake method can be improved so that air can enter the engine without passing through the intercooler, and part of the exhaust gas can be re-input into the engine. ③ An electrically assisted heating system can be used to heat engine components during cold start to reduce incomplete combustion of fuel at low temperatures.

[0071] Specifically:

[0072] A system for solving the problem of excessive emissions during cold start of the engine can be constructed, which includes a series of components and control mechanisms, including valves for regulating intake and exhaust flow, sensors for detecting air temperature, and control units for managing these components. The system optimizes the mixing of intake and exhaust air by controlling the opening and closing of the valves when the air temperature is below a predetermined value, thereby increasing the air temperature entering the engine and reducing the phenomenon of excessive emissions during cold start.

[0073] The engine exhaust temperature reduction device of the present application can intelligently manage the flow of intake and exhaust air by configuring an intercooler three-way valve, an exhaust gas recirculation three-way valve, an air temperature sensor, and a control unit. When the detected air temperature is below a predetermined value, the control unit opens the corresponding valve to mix part of the exhaust gas with the intake air before entering the intercooler, thereby increasing the air temperature entering the engine. This process improves the mixing efficiency of fuel and air, promotes complete combustion of fuel, significantly reduces the emission of unburned hydrocarbons and carbon monoxide during cold start, and solves the problem of excessive emissions during cold start.

[0074] Based on the above creative findings, the technical solution of the present application is proposed.

[0075] Figure 1 The structure of the engine exhaust temperature reduction device provided in the embodiment of the present application is shown in Figure One . As Figure 1 shown, in this embodiment, the engine exhaust temperature reduction device includes an intercooler three-way valve 100, a compressor 200, an engine 300, a turbine 400, an exhaust gas recirculation three-way valve 500, and a control unit 600.

[0076] Specifically, the intercooler three-way valve 100 is a valve used to control the air flow path, which can selectively transmit the air output by the compressor 200 to the engine 300 or other paths. The compressor 200 is a device used to compress air, which can increase air density. The turbine 400 is a device that uses exhaust gas energy to drive the compressor 200, which can improve the overall efficiency of the engine. The exhaust gas recirculation three-way valve 500 is a valve used to control the exhaust gas recirculation path, which can re-introduce a portion of the exhaust gas into the engine's intake system according to the instructions of the control unit to improve combustion efficiency. The control unit 600 is an electronic device that can control the opening and closing of the intercooler three-way valve 100 and the exhaust gas recirculation three-way valve 500 according to sensor input, thereby optimizing the performance of the engine.

[0077] The first inlet of the intercooler three-way valve 100 is connected to the compressor 200 through the intake manifold 700, and the first outlet of the intercooler three-way valve 100 is connected to the engine 300 through the pre-intercooler intake pipe 800. The intake manifold 700 is used to transmit the air output by the compressor 200 to the intercooler three-way valve 100.

[0078] Specifically, this connection method can guide the air output by the compressor 200 into the intercooler three-way valve 100, and then transmit it to the engine 300 through the pre-intercooler intake pipe 800. By controlling the air flow path, compressed air can be directly sent to the engine 300 under certain conditions, such as when the air temperature is below a preset value, to increase the intake temperature and thereby optimize the combustion efficiency and emission performance of the engine 300. This design helps to increase the exhaust gas temperature of the engine 300 in low-temperature environments and reduce pollutant emissions.

[0079] The engine 300 is connected to the turbine 400 through the exhaust manifold 900, which is used to transmit the exhaust gas output by the engine 300 to the turbine 400.

[0080] Specifically, the exhaust port of the engine 300 can be connected to the inlet of the turbine 400 through the exhaust manifold 900. The exhaust manifold 900 is used to guide the exhaust gas produced after combustion of the engine 300 to the turbine 400, so that the exhaust gas flow drives the turbine blades to rotate, thereby driving the compressor 200 connected coaxially with the turbine to operate. This process utilizes the energy of the exhaust gas to drive the turbocharger system, increasing the intake pressure and density of the engine, and thereby improving the power output and combustion efficiency of the engine.

[0081] The second inlet of the exhaust gas recirculation three-way valve 500 is connected to the exhaust manifold 900, and the second outlet of the exhaust gas recirculation three-way valve 500 is connected to the pre-intercooler intake pipe 800 through the pre-intercooler exhaust bypass pipe 1000.

[0082] Specifically, a portion of the exhaust manifold 900 can be connected to the second inlet of the exhaust gas recirculation three-way valve 500 through a pipe, while the second outlet of the exhaust gas recirculation three-way valve 500 is connected to the pre-intercooler intake pipe 800 through the pre-intercooler exhaust bypass pipe 1000. This design can re-introduce part of the exhaust gas into the intake system of the engine 300 to reduce nitrogen oxide emissions. By adjusting the control unit 600, the amount of recirculated exhaust gas can be adjusted as needed to optimize the emission performance and combustion efficiency of the engine.

[0083] The air temperature sensor 7001 is provided on the intake manifold 700 to detect the air temperature.

[0084] Specifically, the air temperature sensor 7001 can monitor the air temperature entering the intake manifold 700 in real time and transmit the temperature data to the control unit 600. Its role is to provide key temperature information to the control unit 600, so that it can adjust the opening and closing state of the intercooler three-way valve 100 and the exhaust gas recirculation three-way valve 500 according to the change of air temperature. This real-time monitoring and adjustment mechanism helps to optimize the intake temperature and combustion efficiency of the engine.

[0085] The control unit 600 is connected to the intercooler three-way valve 100 and the exhaust gas recirculation three-way valve 500 through wires, respectively, and the control unit 600 is used to control the opening and closing of the first outlet and the second outlet.

[0086] Specifically, the control unit 600 is connected to the actuator of each valve through wires, and can send control signals to adjust the opening and closing state of the valve. The control unit 600 can intelligently adjust the opening and closing of the intercooler three-way valve 100 and the exhaust gas recirculation three-way valve 500 according to the data from the air temperature sensor 7001 and other sensors, so as to optimize the flow path of air and exhaust gas. This control mechanism helps to maintain the intake temperature of the engine and the proportion of exhaust gas recirculation under different operating conditions, and improves the combustion efficiency of fuel in the engine.

[0087] When the air temperature is lower than the preset first temperature value, the control unit 600 is used to control the first outlet and the second outlet to be opened, and when the first outlet is opened, the pre-intercooler intake pipe 800 is used to transmit air to the engine 300, and when the second outlet is opened, the pre-intercooler exhaust bypass pipe 1000 is used to transmit a preset volume of exhaust gas in the exhaust manifold 900 to the pre-intercooler intake pipe 800.

[0088] The engine exhaust temperature improving emission reduction device provided by the embodiment mainly comprises a intercooler three-way valve, a compressor, an engine, a turbine, an exhaust gas recirculation three-way valve and a control unit. The air output by the compressor is guided to the engine through the intake manifold and the pre-intercooling intake pipe, while the exhaust manifold transmits the exhaust gas of the engine to the turbine. The exhaust gas recirculation three-way valve connects the exhaust manifold and the pre-intercooling intake pipe through the pre-intercooling exhaust bypass pipe to realize exhaust gas recirculation. The air temperature sensor is installed on the intake manifold to monitor the air temperature in real time and transmit the information to the control unit. The control unit adjusts the opening and closing of the valves to optimize the intake temperature of the engine and the emission performance. The engine exhaust temperature improving emission reduction device realizes the following technical effects: through intelligent control of the intake and exhaust gas recirculation paths, the intake temperature of the engine is optimized and adjusted to improve the combustion efficiency and reduce the emissions. Through the control unit, the opening and closing states of the intercooler three-way valve and the exhaust gas recirculation three-way valve are adjusted. When the air temperature is lower than the preset value, an appropriate amount of exhaust gas is introduced into the intake path to increase the gas temperature and improve the combustion conditions. This dynamic adjustment mechanism not only improves the working efficiency of the engine under different environmental conditions, but also effectively reduces the generation of harmful emissions such as nitrogen oxides, solving the problem of excessive emissions.

[0089] Figure 2 Structure diagram of the engine exhaust temperature improving emission reduction device provided by the embodiment Figure Two As shown in Figure 2 , the embodiment is based on Figure 1 the embodiment to make a detailed description of the engine exhaust temperature improving emission reduction device.

[0090] The engine exhaust temperature improving emission reduction device further comprises a first intercooler 1100 and a second intercooler 1200.

[0091] Specifically, the first intercooler 1100 and the second intercooler 1200 can reduce the temperature of the air and exhaust gas entering the engine. By reducing the air temperature, the intercooler improves the air density, thereby improving the engine performance. Under different working conditions, the use of the intercooler can optimize the intake temperature of the engine, ensuring the provision of supercharging effect at high load and high speed, while avoiding excessive cooling at low temperature start and low load. In addition, the intercooler is also used to reduce the exhaust gas temperature during exhaust gas recirculation to reduce the thermal load on the engine, protect the engine components and optimize the emission control.

[0092] The first intercooler 1100 is arranged on the post-intercooling intake pipe 1300, the third outlet of the intercooler three-way valve 100 is connected with the engine 300 through the post-intercooling intake pipe 1300, the first intercooler 1100 is used for cooling the air, and the post-intercooling intake pipe 1300 is used for transmitting the air to the first intercooler 1100 and sending the cooled air to the engine 300.

[0093] Specifically, the first intercooler 1100 is arranged on the post-intercooled intake pipe 1300, and functions to cool the air entering the post-intercooled intake pipe 1300 through the third outlet of the intercooler three-way valve 100. When the third outlet of the intercooler three-way valve 100 is opened, the air output by the compressor 200 enters the first intercooler 1100 through the post-intercooled intake pipe 1300, and in the process, the temperature of the air is reduced, and then the cooled air is transmitted to the engine 300. This design can reduce the temperature of the air entering the engine under certain working conditions, avoiding damage to the engine 300 caused by excessively high temperature of the engine.

[0094] The second intercooler 1200 is arranged on the post-intercooled exhaust bypass pipe 1400, and the fourth outlet of the exhaust gas recirculation three-way valve 500 is connected to the pre-intercooled intake pipe 800 through the post-intercooled exhaust bypass pipe 1400. The second intercooler 1200 is used to cool a preset volume of exhaust gas, and the post-intercooled exhaust bypass pipe 1400 is used to transmit the preset volume of exhaust gas to the second intercooler 1200, and transmit the cooled preset volume of exhaust gas to the pre-intercooled intake pipe 800.

[0095] Specifically, the fourth outlet of the exhaust gas recirculation three-way valve 500 is connected to the pre-intercooled intake pipe 800 through the post-intercooled exhaust bypass pipe 1400, and the exhaust gas is cooled when passing through the second intercooler 1200, and then is transmitted to the pre-intercooled intake pipe 800. This can reduce the temperature of the exhaust gas, so as to avoid the adverse effects of excessively high exhaust gas temperature on the performance and emissions of the engine when the exhaust gas is reintroduced into the intake system of the engine.

[0096] The engine 300 is provided with a speed sensor 1500, which is used to detect the speed of the engine 300.

[0097] Specifically, the speed sensor 1500 is a sensing device installed on the engine 300, which is used to detect the speed of the engine 300 in real time. By monitoring the speed of the engine 300, the speed sensor 1500 can provide key data to the control unit 600, so as to trigger corresponding control measures when the speed of the engine 300 is lower than a preset value, for example, opening the fourth outlet of the exhaust gas recirculation three-way valve 500, so that the preset volume of exhaust gas enters the pre-intercooled intake pipe 800 through the post-intercooled exhaust bypass pipe 1400, thereby optimizing the emission performance and operating efficiency of the engine.

[0098] The control unit 600 is used to control the third outlet to be opened, so that the air enters the engine 300 through the post-intercooled intake pipe 1300.

[0099] Specifically, the control unit 600 controls the opening and closing of the third outlet of the intercooler three-way valve 100 through the connection. When it is necessary to deliver the cooled air to the engine 300, the control unit 600 sends a signal to open the third outlet of the intercooler three-way valve 100, so that the air enters the engine 300 through the intercooled intake pipe 1300. This process helps to adjust the temperature of the air entering the engine 300, thereby optimizing the combustion efficiency and engine performance.

[0100] When the speed is lower than the preset speed value, the control unit 600 is also used to control the fourth outlet to be opened, so that the preset volume of exhaust gas enters the pre-intercooled intake pipe 800 through the post-intercooled exhaust bypass pipe 1400, and the pre-intercooled intake pipe 800 is also used to transmit the preset volume of cooled exhaust gas to the engine 300.

[0101] Specifically, when the speed of the engine 300 is lower than the preset speed value, the control unit 600 controls the fourth outlet of the exhaust gas recirculation three-way valve 500 to be opened. In this way, the preset volume of exhaust gas enters the pre-intercooled intake pipe 800 through the post-intercooled exhaust bypass pipe 1400, and is transmitted to the engine 300 after being cooled by the second intercooler 1200. This process is achieved by detecting the speed of the engine through the speed sensor 1500 and transmitting the signal to the control unit 600. By introducing cooled exhaust gas, the combustion efficiency of fuel in the engine 300 can be effectively improved, and emissions can be reduced, especially in low speed conditions, which helps to improve the overall performance and environmental performance of the engine.

[0102] The emission reduction device for increasing the exhaust temperature of the engine also includes an exhaust temperature sensor 1600.

[0103] Specifically, the exhaust temperature sensor 1600 is a sensor device installed on the exhaust manifold 900, and its main function is to detect the exhaust temperature of the engine 300. By monitoring the exhaust temperature, the exhaust temperature sensor 1600 can provide real-time data to the control unit 600, so that when the exhaust temperature is higher than the preset second temperature value, the control unit 600 can adjust the opening and closing state of the intercooler three-way valve 100 and the exhaust gas recirculation three-way valve 500, thereby optimizing the operating efficiency of the engine 300.

[0104] The exhaust temperature sensor 1600 is arranged on the exhaust manifold 900, and the exhaust temperature sensor 1600 is used to detect the exhaust temperature, which is used to indicate the combustion efficiency of fuel in the engine 300.

[0105] Specifically, the exhaust temperature sensor 1600 is used to detect the temperature of the exhaust gas emitted by the engine 300 in real time. This temperature data can reflect the combustion efficiency of the fuel in the engine 300, because the combustion efficiency is usually directly related to the exhaust gas temperature. Higher exhaust gas temperature may indicate incomplete combustion of fuel or excessive heat loss, while lower temperature may indicate higher combustion efficiency. By monitoring the exhaust gas temperature, the control unit 600 can adjust the intake and exhaust gas recirculation system to optimize the combustion process.

[0106] When the exhaust temperature is higher than the preset second temperature value, the control unit 600 is used to control the third outlet and the fourth outlet to open, when the third outlet is opened, the air enters the engine 300 through the intercooled intake pipe 1300, and when the fourth outlet is opened, the preset volume of exhaust gas enters the intercooled intake pipe 800 through the intercooled exhaust bypass pipe 1400.

[0107] Specifically, when the exhaust temperature sensor 1600 detects that the exhaust temperature is higher than the preset second temperature value, the control unit 600 will open the third outlet of the intercooler three-way valve 100 and the fourth outlet of the exhaust gas recirculation three-way valve 500. The air cooled by the first intercooler 1100 enters the engine 300 through the intercooled intake pipe 1300, while the preset volume of exhaust gas cooled by the second intercooler 1200 enters the intercooled intake pipe 800 through the intercooled exhaust bypass pipe 1400, and finally enters the engine 300. By introducing the right amount of cooling air and exhaust gas, the temperature and combustion conditions of the combustion chamber are adjusted to improve combustion efficiency and reduce heat loss caused by excessive temperature.

[0108] The emission reduction device for increasing the exhaust temperature of the engine also includes a particulate trap 1700.

[0109] Specifically, the particulate trap 1700 is a device installed on the exhaust manifold 900, and its main function is to collect and filter particulate matter in the exhaust gas. These particulate matters are usually tiny solid particles produced during the combustion process, which may include carbon particles and other pollutants. By trapping these particulate matters, it helps to reduce environmental pollution.

[0110] The particulate trap 1700 is provided on the exhaust manifold 900, and the particulate trap 1700 is used to collect particulate matter in the exhaust gas.

[0111] Specifically, the particulate trap 1700 is installed on the exhaust manifold 900. Its design usually includes filtering materials or structures that can effectively capture and collect tiny particulate matter suspended in the exhaust gas, such as carbon particles and other pollutants. This process is achieved through mechanisms such as physical interception, inertial impact or diffusion. The function of the particulate trap is to reduce the emission of harmful particulate matter, thereby reducing environmental pollution and improving air quality.

[0112] The particle trap 1700 is provided with a concentration sensor 1701 for detecting the concentration of particulate matter in the exhaust gas.

[0113] Specifically, the concentration sensor 1701 is a sensor device installed on the particle trap 1700, which functions to detect the concentration of particulate matter in the exhaust gas. By monitoring the concentration of particulate matter, the concentration sensor 1701 can provide real-time data to the control unit 600, so that when the concentration of particulate matter is higher than the preset concentration value, the control unit 600 triggers corresponding measures, such as controlling the third outlet to open, so that air enters the engine 300 through the intercooled intake pipe 1300, thereby optimizing the operating state of the engine and reducing emissions.

[0114] When the concentration of particulate matter is higher than the preset concentration value, the control unit 600 is configured to control the third outlet to open, so that air enters the engine 300 through the intercooled intake pipe 1300.

[0115] Specifically, when the concentration of particulate matter sensor 1701 detects that the concentration of particulate matter in the exhaust gas is higher than the preset concentration value, the control unit 600 will receive this signal and execute the preset control logic. For example, the control unit 600 will control the third outlet of the intercooler three-way valve 100 to open, so that the air cooled by the first intercooler 1100 enters the engine 300 through the intercooled intake pipe 1300. By increasing the inflow of fresh air, the combustion conditions are improved, thereby reducing the generation and emission of particulate matter in the exhaust gas, and improving the combustion efficiency and environmental performance of the engine.

[0116] The control unit 600 is provided with a wireless communicator 6001, and the control unit 600 is further configured to receive the air temperature sent by the air temperature sensor 7001, the exhaust temperature sent by the exhaust temperature sensor 1600, and the concentration of particulate matter sent by the concentration sensor 1701, and send the intake temperature, the exhaust temperature and the concentration of particulate matter to an external device, and the external device is configured to receive and monitor the intake temperature, the exhaust temperature and the concentration of particulate matter.

[0117] Specifically, the data received by the control unit 600 is sent to an external device, such as a computer or a monitoring system, through the wireless communicator 6001. The external device is configured to receive and monitor these parameters in real time, so as to perform remote monitoring and analysis, thereby optimizing engine performance, improving combustion efficiency and reducing emissions. The implementation of such wireless data transmission and monitoring helps to discover and solve potential problems in a timely manner, ensuring efficient operation of the engine.

[0118] The first intercooler 1100 and the second intercooler 1200 are both water-cooled intercoolers.

[0119] Specifically, the first intercooler 1100 and the second intercooler 1200 are water-cooled intercoolers, which effectively cool the air and exhaust gas through a water cooling system. The water-cooled intercooler uses coolant to flow inside the intercooler, taking away the heat of the air or exhaust gas passing through the intercooler, thereby reducing its temperature. This cooling method can effectively reduce the temperature of the air and exhaust gas compared to air cooling, thereby improving the combustion efficiency and overall performance of the engine, while reducing emissions.

[0120] The emission reduction device for engine exhaust temperature increase further comprises a transmission shaft 1800.

[0121] Specifically, the transmission shaft 1800 is a mechanical connection device for transmitting the rotational motion of the turbine 400 to the compressor 200. The exhaust gas drives the turbine 400 to rotate, and the turbine 400 transmits the rotational motion to the compressor 200 through the transmission shaft 1800, thereby driving the compressor 200 to compress air. This design utilizes the energy of the exhaust gas, improving the overall efficiency and performance of the system.

[0122] The compressor 200 is connected to the turbine 400 through the transmission shaft 1800, and the exhaust gas is used to drive the turbine 400 to rotate, and the turbine 400 is used to drive the transmission shaft 1800 to rotate, and the transmission shaft 1800 is used to drive the compressor 200 to compress air.

[0123] Specifically, after the exhaust gas is discharged from the engine, it enters the turbine 400 and pushes the turbine blades to rotate. The rotation of the turbine 400 is transmitted to the compressor 200 through the transmission shaft 1800, causing the compressor 200 blades to rotate and compress the air entering the engine 300. This process increases the air density entering the engine 300, increases the combustion efficiency and power output of the engine 300, while utilizing the energy of the exhaust gas, improving the overall fuel economy and reducing emissions.

[0124] The throttle valve 7002 is provided on the intake manifold 700 to control the flow of air.

[0125] Specifically, the throttle valve 7002 provided on the intake manifold 700 is used to adjust the air flow through the intake manifold 700. By controlling the opening of the throttle valve 7002, the amount of air entering the compressor 200 can be accurately adjusted, thereby optimizing the intake conditions of the engine 300. This adjustment can achieve air supply under different engine operating conditions, thereby improving combustion efficiency, reducing emissions, and improving the overall performance of the engine.

[0126] The technical effect of the embodiment is that by introducing the first intercooler and the second intercooler, the effective temperature control of the air and the recirculated exhaust gas entering the engine is realized. This configuration helps to reduce the emissions of the engine, improve the fuel economy, and enhance the adaptability of the engine under different working conditions; by setting the rotating speed sensor on the engine and combining the intelligent adjustment of the control unit, the dynamic control of the air and exhaust gas flow path is realized. When the rotating speed of the engine is lower than the preset value, the system automatically opens the exhaust gas recirculation path, so that the cooled exhaust gas enters the engine. This adjustment mechanism optimizes the combustion process under low rotating speed working conditions and improves the combustion efficiency; by setting the exhaust gas temperature sensor on the exhaust manifold, the exhaust gas temperature of the engine can be monitored in real time, and when the detected exhaust gas temperature is higher than the preset second temperature value, the control unit automatically opens the corresponding outlet of the intercooler three-way valve and the exhaust gas recirculation three-way valve, realizing the optimization of the engine performance and the effective control of the emissions; by setting the particulate trap on the exhaust manifold, the effective collection and filtration of particulate matter in the exhaust gas are realized. This not only reduces the particulate pollutants emitted by the engine, thereby reducing the negative impact on the environment, but also improves the overall efficiency and reliability of the exhaust system; by monitoring the particulate matter concentration in the exhaust gas in real time through the concentration sensor, when the detected particulate matter concentration exceeds the preset value, the control unit automatically opens the third outlet, so that the cooled air enters the engine. This mechanism effectively adjusts the intake conditions of the engine, optimizes the combustion process, thereby reducing the generation and emission of particulate matter, and improves the environmental performance and combustion efficiency of the engine; by integrating the wireless communicator, the remote monitoring and data transmission of the key operating parameters of the engine are realized. This real-time data sharing and monitoring capability improves the visibility and response speed of the engine operating state; the water-cooled intercooler is adopted, which utilizes the efficient heat conduction characteristics of the cooling liquid to effectively reduce the temperature of the air and exhaust gas flowing through it. This design not only helps to improve the combustion efficiency and power output of the engine, but also reduces the generation of emissions caused by high temperature; the rotating energy of the turbine is effectively transmitted to the compressor through the transmission shaft, realizing the recovery and reuse of exhaust gas energy. The exhaust gas drives the turbine to rotate, and the turbine drives the compressor to operate through the transmission shaft, thereby improving the air density and pressure entering the engine. This design not only improves the combustion efficiency and power output of the engine, but also improves the fuel economy and helps to reduce emissions; the throttle valve is set on the intake manifold to realize accurate control of air flow. This control can adjust the amount of air entering the compressor according to the real-time demand of the engine, thereby optimizing the combustion process and improving the combustion efficiency and engine performance.

[0127] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments, and the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for reducing emissions by increasing engine exhaust temperature, characterized in that, include: Intercooler three-way valve (100), compressor (200), engine (300), turbine (400), exhaust gas recirculation three-way valve (500), control unit (600) and second intercooler (1200); The first inlet of the intercooler three-way valve (100) is connected to the compressor (200) through the intake manifold (700), and the first outlet of the intercooler three-way valve (100) is connected to the engine (300) through the intercooler intake manifold (800). The intake manifold (700) is used to transmit the air output by the compressor (200) to the intercooler three-way valve (100). The engine (300) is connected to the turbine (400) via an exhaust manifold (900), which is used to transmit the exhaust gas output by the engine (300) to the turbine (400). The second inlet of the exhaust gas recirculation three-way valve (500) is connected to the exhaust manifold (900), and the second outlet of the exhaust gas recirculation three-way valve (500) is connected to the intercooler inlet pipe (800) through the intercooler pre-exhaust gas bypass pipe (1000). An air temperature sensor (7001) for detecting air temperature is provided on the intake manifold (700). The control unit (600) is connected to the intercooler three-way valve (100) and the exhaust gas recirculation three-way valve (500) respectively via wires. The control unit (600) is used to control the opening and closing of the first outlet and the second outlet. When the air temperature is lower than a preset first temperature value, the control unit (600) controls the opening of the first outlet and the second outlet. When the first outlet is open, the intercooler intake manifold (800) transmits the air to the engine (300). When the second outlet is open, the intercooler exhaust bypass manifold (1000) transmits a preset volume of exhaust gas in the exhaust manifold (900) to the intercooler intake manifold (800). The second intercooler (1200) is installed on the intercooled exhaust gas bypass pipe (1400). The fourth outlet of the exhaust gas recirculation three-way valve (500) is connected to the intercooled inlet pipe (800) through the intercooled exhaust gas bypass pipe (1400). The second intercooler (1200) is used to cool the preset volume of exhaust gas. The intercooled exhaust gas bypass pipe (1400) is used to transfer the preset volume of exhaust gas to the second intercooler (1200) and transfer the cooled preset volume of exhaust gas to the intercooled inlet pipe (800). The engine (300) is equipped with a speed sensor (1500), which is used to detect the speed of the engine (300); When the rotational speed is lower than the preset rotational speed value, the control unit (600) is also used to control the fourth outlet to open so that the preset volume of exhaust gas enters the intercooled intake manifold (800) through the intercooled exhaust gas bypass pipe (1400). The intercooled intake manifold (800) is also used to transmit the cooled preset volume of exhaust gas to the engine (300).

2. The emission reduction device for increasing engine exhaust temperature according to claim 1, characterized in that, Also includes: First intercooler (1100); The first intercooler (1100) is installed on the intercooler rear intake pipe (1300). The third outlet of the intercooler three-way valve (100) is connected to the engine (300) through the intercooler rear intake pipe (1300). The first intercooler (1100) is used to cool the air. The intercooler rear intake pipe (1300) is used to transmit the air to the first intercooler (1100) and send the cooled air to the engine (300).

3. The emission reduction device for increasing engine exhaust temperature according to claim 2, characterized in that, The control unit (600) is used to control the opening of the third outlet so that the air enters the engine (300) through the intercooler rear intake pipe (1300).

4. The emission reduction device for increasing engine exhaust temperature according to claim 2, characterized in that, Also includes: Exhaust temperature sensor (1600); The exhaust temperature sensor (1600) is located on the exhaust manifold (900). The exhaust temperature sensor (1600) is used to detect the exhaust temperature, which is used to represent the combustion efficiency of fuel in the engine (300). When the exhaust temperature is higher than the preset second temperature value, the control unit (600) controls the opening of the third outlet and the fourth outlet. When the third outlet is opened, the air enters the engine (300) through the intercooler rear intake pipe (1300). When the fourth outlet is opened, the preset volume of exhaust gas enters the intercooler front intake pipe (800) through the intercooler rear exhaust bypass pipe (1400).

5. The emission reduction device for increasing engine exhaust temperature according to claim 4, characterized in that, Also includes: Particle trap (1700); The particulate filter (1700) is installed on the exhaust manifold (900) and is used to collect particulate matter in the exhaust gas.

6. The emission reduction device for increasing engine exhaust temperature according to claim 5, characterized in that, The particulate filter (1700) is equipped with a concentration sensor (1701), which is used to detect the concentration of particulate matter in the exhaust gas; When the particulate matter concentration is higher than a preset concentration value, the control unit (600) controls the third outlet to open so that the air enters the engine (300) through the intercooler rear intake pipe (1300).

7. The emission reduction device for increasing engine exhaust temperature according to claim 6, characterized in that, The control unit (600) is equipped with a wireless communicator (6001). The control unit (600) is also used to receive the air temperature sent by the air temperature sensor (7001), the exhaust temperature sent by the exhaust temperature sensor (1600), and the particulate matter concentration sent by the concentration sensor (1701), and to send the intake air temperature, the exhaust temperature and the particulate matter concentration to an external device. The external device is used to receive and monitor the intake air temperature, the exhaust temperature and the particulate matter concentration.

8. The emission reduction device for increasing engine exhaust temperature according to claim 2, characterized in that, Both the first intercooler (1100) and the second intercooler (1200) are water-cooled intercoolers.

9. The emission reduction device for increasing engine exhaust temperature according to claim 1, characterized in that, Also includes: Drive shaft (1800); The compressor (200) is connected to the turbine (400) via the drive shaft (1800). The exhaust gas is used to drive the turbine (400) to rotate, the turbine (400) is used to drive the drive shaft (1800) to rotate, and the drive shaft (1800) is used to drive the compressor (200) to compress the air.

10. The emission reduction device for increasing engine exhaust temperature according to claim 1, characterized in that, The intake manifold (700) is equipped with a throttle valve (7002), which is used to control the air flow rate.

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