WO2021097655A1

WO2021097655A1 - Intelligent diesel vehicle exhaust gas treatment system

Info

Publication number: WO2021097655A1
Application number: PCT/CN2019/119411
Authority: WO
Inventors: 王六杞
Original assignee: 台州三元车辆净化器有限公司
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2021-05-27

Abstract

Provided is an intelligent diesel vehicle exhaust gas treatment system, which comprises an exhaust gas purifier, a sensor and an automatic controller (9); the exhaust gas purifier comprises a gas inlet pipe (1), a housing (2), and a gas outlet pipe (3); the housing (2) is internally provided with an airflow distribution plate (4); the airflow distribution plate (4) divides the housing (2) into two muffler chambers A and B, the gas inlet pipe (1) is in communication with muffler chamber A, and the gas outlet pipe (3) is in communication with muffler chamber B; the airflow distribution plate (4) is provided with ventilation holes (41); muffler chamber B is provided with a honeycomb oxidation catalyst carrier (5) and a particle trap (6); the exhaust gas purifier can reduce the exhaust gas of diesel vehicles by 90% and can be fixed on the chassis of the vehicle with a hoop as a replacement for the original exhaust muffler; the sensor is used to collect the working temperature and exhaust back pressure of the exhaust gas purifier when the vehicle is driven. The automatic controller monitors and displays the exhaust temperature and back pressure value, and promptly alerts a driver or an environmental protection management department for maintenance when the exhaust gas purifier experiences a malfunction,.

Description

Intelligent diesel vehicle exhaust gas treatment system

Technical field

The invention relates to the field of diesel vehicle exhaust post-treatment, in particular to an intelligent diesel vehicle exhaust post-treatment system.

Background technique

With the vigorous development of the logistics industry, diesel vehicles are widely used due to their strong power, good economic performance, and low exhaust pollution. According to incomplete statistics, as of the end of 2017, the number of diesel vehicles in my country was 19.68 million, accounting for 9.4% of the total number of vehicles in the country. Among them, light trucks, heavy trucks, small passenger cars, and medium trucks are the main components of diesel vehicles, with 9.455 million, 6.166 million, 1.466 million, and 1.286 million respectively, accounting for 48.0% of the total number of diesel vehicles. 31.3%, 7.4%, 6.5%. A large number of vehicle exhaust emissions have a serious impact on people's daily production and life.

Catalytic conversion and particle capture technology is one of the core technologies of the current diesel vehicle exhaust aftertreatment system, which can effectively reduce more than 90% of carbon monoxide, hydrocarbons, and carbon particles in diesel vehicle exhaust. In recent years, it has been widely used in the transformation market of diesel engines in use in various provinces and cities.

Due to the long-term driving of diesel vehicles in various alternating working conditions, the road is long and the working environment is harsh. Most of the vehicles lack scientific maintenance and the conditions are very different, which brings great difficulties in the modification of the exhaust gas of the vehicles. In addition, the lower exhaust temperature is not conducive to catalytic conversion and passive regeneration, causing a large amount of carbon particles to accumulate inside the trap, causing deterioration of engine combustion, increased exhaust back pressure, and poor economic performance; moreover, a large number of carbon particles are in the trap. After the trap is accumulated inside, if it is not repaired in time, the exhaust gas purifier will be damaged.

Summary of the invention

The purpose of the present invention is to effectively solve the above-mentioned technical deficiencies and provide an intelligent diesel vehicle exhaust after-treatment system, which can not only effectively reduce exhaust emissions, but also monitor the use of exhaust purifiers, and prompt exhaust gas through charts, sounds, and lights in time. Purifier status, when the exhaust gas purifier works abnormally, it will promptly remind the driver to maintain, which not only reduces the probability of exhaust gas purifier damage, but also improves the service life and economic performance of the engine; after a large number of loading tests and lifespans After the test, the emission performance after loading meets the EU Phase 5 standard and the service life is over 160,000 kilometers.

The present invention is achieved through the following technical solutions.

Intelligent diesel vehicle exhaust gas treatment system, including exhaust gas purifier, sensor and automatic controller; among them:

The exhaust gas purifier includes an air inlet pipe, a casing, and an outlet pipe. The casing is provided with an air distribution plate. The air distribution plate divides the inside of the casing into two silencing chambers A and B. The air inlet pipe is connected with the silencing chamber A and the outlet The air pipe communicates with the muffler cavity B; the air flow distribution plate is provided with vent holes; the muffler cavity B is provided with a honeycomb oxidation catalyst carrier and a particle trap.

The sensor includes a temperature sensor and a differential pressure sensor, the temperature sensor is arranged on the surface of the intake pipe and the housing; the differential pressure sensor is connected with the intake pipe and the exhaust pipe; both the temperature sensor and the differential pressure sensor are electrically connected with the automatic controller.

The housing includes an air inlet section, a capture section and an air outlet section, the air inlet section includes a left end cover and a cylindrical metal shell, the capture section includes a cylindrical metal shell, and the air outlet section includes a cylindrical metal shell and a right end cover. The air inlet section, the capture section and the air outlet section are connected by flanges to form the above-mentioned housing; the air flow distribution plate is arranged in the cylindrical metal shell of the air inlet section, and the air flow distribution plate makes the inside of the cylindrical metal shell of the air inlet section The left part of the air inlet section forms a muffler cavity A, the right part of the cylindrical metal shell of the inlet section shares the muffler cavity B with the capture section and the air outlet section; the honeycomb oxidation catalyst carrier is arranged in the cylindrical metal shell of the air inlet section In the right part of the inner part, the particle trap is arranged in the cylindrical metal shell of the trap section.

One end of the intake pipe is connected with the engine outlet pipe, the other end of the intake pipe passes through the left end cover and communicates with the muffler chamber A, the end of the air intake pipe communicating with the muffler chamber A is punched with a muffler hole; the intake pipe is connected to the left end cover The connection is sealed.

The air inlet pipe of the exhaust gas purifier and the cylindrical metal shells of the air inlet section and the air outlet section are all provided with a temperature sensor fixing seat, and the temperature sensor is arranged on the temperature sensor fixing seat.

The intake pipe and the exhaust pipe are provided with pressure pipes, and the intake pipe and the exhaust pipe are connected with the differential pressure sensor through the pressure pipe.

The oxidation catalyst carrier and the particle trap are one of a metal honeycomb or a ceramic honeycomb, and a layer of oxidation catalyst coating is coated on the inner surface of the oxidation catalyst carrier and the particle trap.

The vent holes on the surface of the air distribution plate are ring-shaped holes.

The temperature sensor uses a high-precision and high-sensitivity K-type thermocouple, and the surface is coated with platinum electrodes to monitor the working temperature of the exhaust gas purifier.

The pressure difference sensor is equipped with a high-precision and high-sensitivity piezoelectric module to detect the pressure difference before and after the exhaust gas purifier.

The automatic controller includes a housing, a display screen, a function button, a data interface, a PCB board, software, etc., which mainly processes and displays the signals collected by the sensor, and monitors and alarms the working status of the exhaust gas purifier, as well as remote data transmission and storage. And other functions.

The exhaust gas purifier of the present invention can reduce the exhaust gas of diesel vehicles by 90%, and can be fixed on the vehicle chassis with a hoop instead of the original exhaust muffler; the sensor is used to collect the working temperature and exhaust back pressure of the exhaust gas purifier during the running of the vehicle , The automatic controller monitors and displays the exhaust temperature and back pressure value. When the exhaust gas purifier works abnormally, it promptly reminds the driver or environmental protection management department to maintain.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the present invention;

Figure 2 is a schematic diagram of the internal structure of the exhaust gas purifier of the present invention;

Figure 3 is a schematic diagram of the appearance of the purifier of the present invention;

Figure 4 is a schematic diagram of the structure of the air distribution plate of the present invention.

Specific implementation plan

As shown in Figures 1-4, the present invention discloses an intelligent diesel vehicle exhaust gas treatment system, which includes an exhaust gas purifier, a sensor and an automatic controller; among them:

The exhaust gas purifier includes an air inlet pipe 1, a casing 2, an air outlet pipe 3. The casing is provided with an air distribution plate 4, and the air distribution plate divides the inside of the casing into two silencing cavities A and B, the air intake pipe and the silencing cavity A is in communication, and the air outlet pipe is in communication with the muffler chamber B; the air distribution plate is provided with a vent 41; the muffler chamber B is provided with a honeycomb oxidation catalyst carrier 5 and a particle trap 6.

The sensor includes a temperature sensor 7 and a differential pressure sensor 8. The temperature sensor is arranged on the surface of the intake pipe and the housing; the differential pressure sensor is connected to the intake pipe and the exhaust pipe; the temperature sensor and the differential pressure sensor are both connected to the automatic controller 9 Electric connection.

The housing includes an air inlet section 21, a capture section 22, and an air outlet section 23. The air inlet section includes a left end cover 211 and a cylindrical metal shell. The capture section includes a cylindrical metal shell, and the outlet section includes a cylindrical metal shell and a right end cover. 231. The air inlet section, the capture section and the air outlet section are connected to form the above-mentioned housing by a flange 10; the air flow distribution plate is arranged in the cylindrical metal shell of the air inlet section, and the air flow distribution plate makes the air inlet section The left part of the cylindrical metal shell forms a muffler cavity A, and the right part of the cylindrical metal shell of the air inlet section forms a muffler cavity B with the capture section and the air outlet section; the honeycomb oxidation catalyst carrier is arranged in the air inlet section. In the right part of the cylindrical metal shell of the section, the particle trap is arranged in the cylindrical metal shell of the capturing section.

One end of the intake pipe 1 is connected with the engine outlet pipe, the other end of the intake pipe passes through the left end cover and communicates with the muffler chamber A, the end of the air intake pipe communicating with the muffler chamber A is punched with a muffler hole 11; the intake pipe is connected to the left end The joint of the cover is sealed, and the sealing can improve the noise reduction effect.

The air inlet pipe of the exhaust gas purifier and the cylindrical metal shells of the air inlet section and the air outlet section are provided with a temperature sensor fixing seat, and the temperature sensor 7 is arranged on the temperature sensor fixing seat.

A pressure pipe 12 is provided on the intake pipe and the exhaust pipe, and the intake pipe and the exhaust pipe are connected with the differential pressure sensor through the pressure pipe.

The vent holes on the surface of the air flow distribution plate are ring-shaped holes, which can redistribute the air flow twice, prevent the exhaust gas from directly hitting the oxidation catalyst carrier and cause damage, and can also improve the noise reduction effect.

The intelligent diesel vehicle exhaust gas treatment system of the present invention includes an exhaust gas purifier, a sensor and an automatic controller. The exhaust gas purifier can reduce diesel vehicle exhaust gas by 90% and can be fixed on the vehicle chassis with a hoop instead of the original vehicle exhaust gas. Muffler, the sensor is used to collect the working temperature of the exhaust gas purifier and exhaust back pressure during the driving process. The automatic controller monitors and displays the exhaust temperature and back pressure value. When the exhaust gas purifier works abnormally, it will promptly remind Maintenance by the driver or environmental management department.

The exhaust gas purifier of the present invention has a detachable structure, which is divided into an intake section, a capture section, and an exhaust section, and each section is connected by a flange; the segmented exhaust gas purifier can reduce the volume of the exhaust gas purifier, which is convenient for production and assembly, and at the same time More convenient maintenance.

The sensor of the present invention includes a temperature sensor and a differential pressure sensor. The temperature sensor uses a high-precision and high-sensitivity K-type thermocouple, and the surface is coated with platinum electrodes to monitor the working temperature of the exhaust gas purifier. The temperature sensitivity is 30ms, and the pressure is ± 1Pa; The differential pressure sensor uses a high-precision and high-sensitivity piezoelectric module to detect the pressure difference before and after the exhaust gas purifier; the automatic controller includes a housing, a display screen, a function button, a data interface, a PCB board, and software It mainly processes and displays the signals collected by the sensors, and monitors the working status of the exhaust gas purifier, alarms, remote data transmission, storage and other functions; the temperature sensor and the differential pressure sensor are electrically connected to the automatic controller.

The working principle is further described below: When the engine exhaust enters the silencing chamber A of the exhaust gas purifier through the silencing hole of the intake pipe 1, the gas pressure and flow velocity drop rapidly, and the first-stage attenuation of noise is realized. After the attenuation, the gas passes through the annular hole on the air distribution plate 5 and enters the anechoic chamber B. The gas flow rate and pressure rapidly increase and then immediately decrease, achieving a secondary attenuation of noise. The attenuated gas finally passes through the small holes on the oxidation catalyst carrier 6, and the harmful CO, HC, SOF, PM in the exhaust react with the catalyst coating to be converted into non-toxic CO2 and H2O, completing the exhaust gas First-level purification. After the primary purification, the gas still contains a large amount of carbon particles, which is captured by the particle trap 7 and then enters the atmosphere through the exhaust pipe 9 in the gas outlet section to achieve the effect of exhaust gas purification and noise reduction.

By installing multiple temperature sensors and differential pressure sensors on the exhaust gas purifier, the present invention can not only effectively reduce exhaust gas emissions, but also monitor the use of the exhaust gas purifier. The control system in the driver's cabin is equipped with a display screen, which can promptly pass charts and sounds. , The light prompts the status of the exhaust gas purifier. When the exhaust gas purifier works abnormally, it will promptly remind the driver to perform maintenance, which not only reduces the probability of damage to the exhaust gas purifier, but also improves the service life and economic performance of the engine; after a large number of installations Vehicle test and life test, after installation, the emission performance meets the EU Phase 5 standard and the service life is over 160,000 kilometers.

Claims

Intelligent diesel vehicle exhaust gas treatment system, including exhaust gas purifier, sensor and automatic controller; among them:

The exhaust gas purifier includes an air inlet pipe, a casing, and an outlet pipe. The casing is provided with an air distribution plate. The air distribution plate divides the inside of the casing into two silencing chambers A and B. The air inlet pipe is connected with the silencing chamber A and the outlet The air pipe is in communication with the muffler cavity B; the air flow distribution plate is provided with vent holes; the muffler cavity B is provided with a honeycomb oxidation catalyst carrier and a particle trap;

The sensor includes a temperature sensor and a differential pressure sensor, the temperature sensor is arranged on the surface of the intake pipe and the housing; the differential pressure sensor is connected with the intake pipe and the exhaust pipe; both the temperature sensor and the differential pressure sensor are electrically connected with the automatic controller.
An intelligent diesel vehicle exhaust gas treatment system according to claim 1, wherein the housing includes an intake section, a capture section and an exhaust section, and the intake section includes a left end cover and a cylindrical metal shell to capture The section includes a cylindrical metal shell, and the outlet section includes a cylindrical metal shell and a right end cover. The inlet section, the capture section and the outlet section are flanged to form the above-mentioned housing; the air distribution plate is arranged on the inlet In the cylindrical metal shell of the section, the air distribution plate makes the left part of the cylindrical metal shell of the inlet section form a silencing chamber A, and the right part of the cylindrical metal shell of the inlet section is shared with the capture section and the outlet section to form a silencing chamber. Acoustic cavity B; the honeycomb oxidation catalyst carrier is arranged in the right part of the cylindrical metal shell of the intake section, and the particle trap is arranged in the cylindrical metal shell of the capture section.
An intelligent diesel vehicle exhaust gas treatment system according to claim 2, wherein one end of the intake pipe is connected with the engine exhaust pipe, the other end of the intake pipe passes through the left end cover and communicates with the muffler chamber A, and the intake pipe An end connected to the muffler cavity A is flushed with an muffler hole; the connection between the air inlet pipe and the left end cover is sealed.
An intelligent diesel vehicle exhaust treatment system according to claim 1, characterized in that: the exhaust gas purifier intake pipe, and the cylindrical metal shells of the intake section and the exhaust section are provided with temperature sensor fixing seats , The temperature sensor is arranged on the temperature sensor fixing seat.
The intelligent exhaust gas treatment system for diesel vehicles according to claim 1, characterized in that: the intake pipe and the exhaust pipe are provided with pressure pipes, and the intake pipe and the exhaust pipe are connected with the differential pressure sensor through the pressure pipe .
An intelligent diesel vehicle exhaust gas treatment system according to claim 1 or 2, wherein the oxidation catalyst carrier and particle trap are one of metal honeycomb or ceramic honeycomb. The surface of the inner hole of the trap is coated with a layer of oxidation catalyst coating.
The intelligent diesel vehicle exhaust gas treatment system according to claim 1 or 2, characterized in that the vent holes on the surface of the air distribution plate are annular holes.
An intelligent diesel vehicle exhaust gas treatment system according to claim 1 or 4, characterized in that: the temperature sensor uses a high-precision and high-sensitivity K-type thermocouple, and the surface is coated with platinum electrodes to monitor exhaust gas purification The working temperature of the device.
An intelligent diesel vehicle exhaust gas treatment system according to claim 1 or 5, wherein the pressure difference sensor is equipped with a high-precision and high-sensitivity piezoelectric module to detect the pressure difference before and after the exhaust gas purifier.
The intelligent diesel vehicle exhaust gas treatment system according to claim 1, characterized in that: the automatic controller includes a housing, a display screen, a function button, a data interface, a PCB board, software, etc., which mainly collects sensors Signal processing, display, working status monitoring, alarm, remote data transmission, storage and other functions of the exhaust gas purifier.