CN215979556U - Particle catcher and particle catcher heating control system - Google Patents

Particle catcher and particle catcher heating control system Download PDF

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Publication number
CN215979556U
CN215979556U CN202122170716.4U CN202122170716U CN215979556U CN 215979556 U CN215979556 U CN 215979556U CN 202122170716 U CN202122170716 U CN 202122170716U CN 215979556 U CN215979556 U CN 215979556U
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China
Prior art keywords
cavity
air inlet
heating
particle
differential pressure
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CN202122170716.4U
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Chinese (zh)
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张晓平
邓水根
顾沈军
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Jiangsu Wokai Automobile Technology Co ltd
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Jiangsu Wokai Automobile Technology Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Abstract

The utility model provides a particle catcher and a particle catcher heating control system, wherein the particle catcher comprises a shell, a temperature sensor and a pressure difference sensor, wherein: an air inlet cavity, a trapping cavity and an air outlet cavity are sequentially arranged in the shell, wherein an air inlet pipe is arranged at the end part of the air inlet cavity; the end part of the air outlet cavity is provided with an air outlet pipe; a particle trapping carrier is filled in the trapping cavity, and a heating layer is arranged between the particle trapping carrier and the inner wall of the trapping cavity; the temperature sensor is arranged on the air inlet cavity and used for acquiring an air inlet temperature value in the air inlet cavity; the differential pressure sensor is arranged on the outer side of the shell, a first detection end of the differential pressure sensor penetrates into the air inlet cavity, a second detection end of the differential pressure sensor penetrates into the air outlet cavity, and the differential pressure sensor is used for acquiring a differential pressure value between the air inlet cavity and the air outlet cavity. The utility model can realize self-heating, realize the passive regeneration of the particle catcher and prevent the particle catcher from being blocked by particles.

Description

Particle catcher and particle catcher heating control system
Technical Field
The utility model relates to the field of automobile manufacturing, in particular to a particle catcher and a particle catcher heating control system.
Background
In a vehicle equipped with a particle trap, as the vehicle drives over a period of time, the build-up of particulate matter in the particle trap causes an increase in engine back pressure, resulting in a decrease in engine performance, so that periodic removal of deposited particulate matter is required to restore the filtering performance of the particle trap. I.e. the carbon in it undergoes chemical reaction, oxidation and combustion, called regeneration of the particulate trap. Particulate trap regeneration can be expressed using the following several equations. When the internal temperature of the particle catcher is above 600 ℃ and the oxygen concentration is high, a chemical exothermic reaction occurs: c + O2＝CO2. At internal temperatures above 800 ℃, and in the absence of oxygen, the following chemical endothermic reaction occurs: c + H2O＝CO+H2. For the presence of a catalytically coated particle trap, it is also possible to carry out a passive regeneration, i.e. a continuous regeneration reaction, between 250 ℃ and 450 ℃: c +2NO2＝CO2+2NO。
Regeneration of particulate traps can be both passive and active: passive regeneration refers to that when a driver releases a pedal under a daily driving condition, the engine is cut off oil, a large amount of oxygen enters the particle trap, and when the temperature of the particle trap is higher than a regeneration temperature threshold value, regeneration is realized. Active regeneration refers to that under the condition that passive regeneration cannot be met, a vehicle runs to a special working condition (for example, 80KM/h running speed is kept for 30 minutes), an ECM is used for giving an instruction to an engine, the engine works under the special working condition, the temperature of tail gas rises, and after the temperature of a particulate trap rises, the air-fuel ratio (excessive oxygen) is reduced, so that the particulate trap regeneration is realized.
When the particle catcher is driven below a passive regeneration temperature threshold value for a long time, the particle catcher can be seriously blocked, the performance of an engine is reduced, at the moment, an instruction can be sent to the engine only through the ECM, the engine can run under a special working condition to actively regenerate the particle catcher, and the vehicle needs to idle for a long time to completely regenerate the particle catcher when the vehicle is serious, so that the time cost of a driver is increased, and the fuel economy of the vehicle is not facilitated.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one of the above technical problems, a first aspect of the present invention provides a particle trap comprising a housing, a temperature sensor, and a differential pressure sensor, wherein:
an air inlet cavity, a trapping cavity and an air outlet cavity are sequentially arranged in the shell, wherein an air inlet pipe communicated with the air inlet cavity is arranged at the end part of the air inlet cavity; the end part of the air outlet cavity is provided with an air outlet pipe communicated with the air outlet cavity; a particle trapping carrier is filled in the trapping cavity, and a heating layer is arranged between the particle trapping carrier and the inner wall of the trapping cavity;
the temperature sensor is arranged on the air inlet cavity and is used for acquiring an air inlet temperature value in the air inlet cavity;
the pressure difference sensor is arranged on the outer side of the shell, a first detection end of the pressure difference sensor penetrates into the air inlet cavity, a second detection end of the pressure difference sensor penetrates into the air outlet cavity, and the pressure difference sensor is used for acquiring a pressure difference value between the air inlet cavity and the air outlet cavity.
In some embodiments, a heating control module is further disposed on the capture chamber, the heating control module being electrically connected to the heating layer, the heating control module being configured to implement heating control of the heating layer.
In some embodiments, the particulate capture carrier is a ceramic filter material.
In some embodiments, the heating layer is a heating resistance wire.
The particle catcher provided by the utility model is integrated with the temperature sensor, the differential pressure sensor and the heating layer, and the temperature in the particle catcher can be increased through heating by the heating layer, so that the particle catcher meets the passive regeneration condition, the passive regeneration of the particle catcher is realized, and the particle catcher is prevented from being blocked by particles.
The utility model also provides a particle catcher heating control system, which comprises an engine control unit, a timer and the particle catcher, wherein: the timer is in signal connection with the engine control unit and is used for acquiring the accumulated running time value of the engine and sending the acquired accumulated running time value to the engine control unit; the temperature sensor, the differential pressure sensor and the heating control module are in signal connection with the engine control unit; the temperature sensor and the differential pressure sensor respectively send the acquired intake air temperature value and the acquired differential pressure value to the engine control unit; the engine control unit generates a temperature control signal based on at least one of the received accumulated run time value, the intake air temperature value, and the differential pressure value, and transmits the generated temperature control signal to the heating control module.
Through the matching of the engine control unit, the timer and the particle catcher, the particle catcher heating control system can implement the heating control on the particle catcher, thereby shortening the time of active regeneration caused by serious blockage of the particle catcher.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings which are needed in the embodiments and are practical will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts. Wherein the content of the first and second substances,
FIG. 1 is a schematic view of a particle trap according to the present invention;
FIG. 2 is a schematic diagram of a particle trap heating control system according to the present invention;
fig. 1 to 2 include:
the particle catcher 10: the particle collecting device comprises an air inlet cavity 11, a collecting cavity 12, an air outlet cavity 13, a temperature sensor 14, a differential pressure sensor 15, an air inlet pipe 16, an air outlet pipe 17, a heating control module 18, a particle collecting carrier 121 and a heating layer 122;
an engine control unit 20;
a timer 30.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.
As shown in fig. 1, the particle trap 10 provided by the present invention comprises a housing, a temperature sensor 14, and a differential pressure sensor 15, wherein:
an air inlet cavity 11, a trapping cavity 12 and an air outlet cavity 13 are sequentially arranged in the shell, wherein an air inlet pipe 16 communicated with the air inlet cavity 11 is arranged at the end part of the air inlet cavity 11. The end part of the air outlet cavity 13 is provided with an air outlet pipe 17 communicated with the air outlet cavity 13. The particle collecting carrier 121 is filled in the collecting chamber 13, and a heating layer 122 is provided between the particle collecting carrier 121 and the inner wall of the collecting chamber 12.
The temperature sensor 14 is arranged on the air inlet cavity and used for acquiring an air inlet temperature value in the air inlet cavity 11.
The differential pressure sensor 15 sets up in the outside of casing, and differential pressure sensor 15's first detection end penetrates to the air inlet cavity 11 in, and differential pressure sensor 15's second detection end penetrates to the air outlet cavity 13 in, and differential pressure sensor 15 is used for acquireing the pressure differential value in air inlet cavity 11 and the air outlet cavity 13.
The operating principle of the particle trap 10 of the present invention is as follows:
the tail gas exhausted by the engine enters the trapping cavity 12 through the air inlet pipe 16 and the air inlet cavity 11, particulate matters in the tail gas are filtered by the particle trapping carrier 121 in the trapping cavity 12, and the filtered tail gas is finally exhausted through the air outlet cavity 13 and the air outlet pipe 17.
When the inlet temperature value of the exhaust gas acquired by the temperature sensor 14 is lower than the passive regeneration temperature threshold value of the particle trap, the accumulated running time of the engine is greater than a set value, and the differential pressure value between the inlet cavity 11 and the outlet cavity 13 is greater than a preset value, the heating layer 122 is controlled to heat, so that the temperature in the particle trap is raised to the regeneration temperature threshold value, the temperature condition of passive regeneration is met, the passive regeneration of the particle trap is realized, and the particle trap is prevented from being blocked by particles.
And when the pressure difference value between the air inlet cavity 11 and the air outlet cavity 13 is not larger than the preset value, which indicates that the particle catcher has no blocking risk, the heating layer 122 is controlled to stop heating.
Optionally, a heating control module 18 is further disposed on the capture chamber 12, the heating control module 18 is electrically connected to the heating layer 122, and the heating control module 18 is configured to perform heating control on the heating layer 122.
Alternatively, the particle trapping carrier 121 is a ceramic filter material, and the heating layer 122 is a heating resistance wire.
The present invention also provides a particulate trap heating control system, as shown in fig. 2, comprising an Engine Control Unit (ECU)20, a timer 30, and the particulate trap 10 described above, wherein:
the timer 30 is in signal connection with the engine control unit 20 and is configured to obtain an accumulated running time value of the engine and to send the obtained accumulated running time value to the engine control unit.
The temperature sensor 14, the differential pressure sensor 15 and the heating control module 18 are in signal connection with the engine control unit. The temperature sensor 14 and the differential pressure sensor 15 respectively transmit the acquired intake air temperature value and the acquired differential pressure value to the engine control unit 20.
The engine control unit 20 generates a temperature control signal based on at least one of the received accumulated operating time value, intake air temperature value, and differential pressure value of the engine, and transmits the generated temperature control signal to the heating control module 18.
For example, when the intake temperature value of the exhaust gas sent by the temperature sensor 14 is lower than the threshold value of the passive regeneration temperature of the particulate trap, the accumulated operation time sent by the timer 30 is greater than the set value, and the pressure difference value between the intake chamber 11 and the exhaust chamber 13 sent by the pressure difference sensor 15 is greater than the predetermined value, at this time, the engine control unit 20 generates a heating start signal and sends the heating start signal to the heating control module 18, and the heating control module 18 controls the heating layer 122 to start heating based on the heating start signal.
And when the difference value between the pressures in the air inlet chamber 11 and the air outlet chamber 13 sent by the differential pressure sensor 15 is not greater than the predetermined value, the engine control unit 20 generates a heating stop signal and sends the heating stop signal to the heating control module 18, and the heating control module 18 controls the heating layer 122 to stop heating based on the heating stop signal.
It can be seen that the particle catcher heating control system of the present invention can implement the heating control of the particle catcher 10 by the cooperation of the engine control unit 20, the timer 30 and the particle catcher 10, thereby shortening the time of active regeneration due to severe clogging of the particle catcher 10.
The utility model has been described above with a certain degree of particularity. It will be understood by those of ordinary skill in the art that the description of the embodiments is merely exemplary and that all changes that come within the true spirit and scope of the utility model are desired to be protected. The scope of the utility model is defined by the appended claims rather than by the foregoing description of the embodiments.

Claims (5)

1. A particle trap, comprising a housing, a temperature sensor, and a differential pressure sensor, wherein:
an air inlet cavity, a trapping cavity and an air outlet cavity are sequentially arranged in the shell, wherein an air inlet pipe communicated with the air inlet cavity is arranged at the end part of the air inlet cavity; the end part of the air outlet cavity is provided with an air outlet pipe communicated with the air outlet cavity; a particle trapping carrier is filled in the trapping cavity, and a heating layer is arranged between the particle trapping carrier and the inner wall of the trapping cavity;
the temperature sensor is arranged on the air inlet cavity and is used for acquiring an air inlet temperature value in the air inlet cavity;
the pressure difference sensor is arranged on the outer side of the shell, a first detection end of the pressure difference sensor penetrates into the air inlet cavity, a second detection end of the pressure difference sensor penetrates into the air outlet cavity, and the pressure difference sensor is used for acquiring a pressure difference value between the air inlet cavity and the air outlet cavity.
2. The particle trap of claim 1, further comprising a heating control module disposed on the trapping cavity, the heating control module being electrically connected to the heating layer, the heating control module being configured to implement heating control of the heating layer.
3. The particle trap of claim 1, wherein the particle trap carrier is a ceramic filter material.
4. The particle trap of claim 1, wherein the heating layer is a heating resistance wire.
5. A particle trap heating control system comprising an engine control unit, a timer, and the particle trap of claim 2, wherein:
the timer is in signal connection with the engine control unit and is used for acquiring the accumulated running time value of the engine and sending the acquired accumulated running time value to the engine control unit;
the temperature sensor, the differential pressure sensor and the heating control module are in signal connection with the engine control unit;
the temperature sensor and the differential pressure sensor respectively send the acquired intake air temperature value and the acquired differential pressure value to the engine control unit;
the engine control unit generates a temperature control signal based on at least one of the received accumulated run time value, the intake air temperature value, and the differential pressure value, and transmits the generated temperature control signal to the heating control module.
CN202122170716.4U 2021-09-09 2021-09-09 Particle catcher and particle catcher heating control system Active CN215979556U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122170716.4U CN215979556U (en) 2021-09-09 2021-09-09 Particle catcher and particle catcher heating control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122170716.4U CN215979556U (en) 2021-09-09 2021-09-09 Particle catcher and particle catcher heating control system

Publications (1)

Publication Number Publication Date
CN215979556U true CN215979556U (en) 2022-03-08

Family

ID=80468664

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202122170716.4U Active CN215979556U (en) 2021-09-09 2021-09-09 Particle catcher and particle catcher heating control system

Country Status (1)

Country Link
CN (1) CN215979556U (en)

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