CN206468411U - Low-temperature adaptation diesel engine vehicle tail gas treatment device - Google Patents

Abstract

The utility model relates to the field of vehicle tail gas treatment, in particular to a diesel engine tail gas treatment device. A low-temperature adaptable diesel engine vehicle exhaust gas treatment device, including a particle trap and a differential pressure sensor, the installation height of the differential pressure sensor is higher than that of the particle trap, and the two air pressure ports of the differential pressure sensor are respectively connected through a differential pressure pipeline At both ends of the particle trap, with the direction from the differential pressure sensor to the particle trap as the positive direction, the channel in the differential pressure pipeline transitions smoothly throughout the entire process and requires that the upstream height of any section of the channel is always higher than the downstream height. The utility model adjusts the direction of the pressure difference pipeline to meet the water flow requirement, so that the condensed water droplets will not remain in the particle catcher and the pressure difference sensor, so that the pressure difference sensor will not be affected by itself and the pipeline when the vehicle is driving in a low-temperature area. The ice in the air affects the pressure difference accuracy, avoids the damage or failure of the particle trap, improves the reliability of the exhaust gas treatment device, and reduces the pollutant emission of the vehicle.

Description

Low temperature adaptable diesel engine vehicle exhaust gas treatment device

technical field

The utility model relates to the field of vehicle tail gas treatment, in particular to a diesel engine tail gas treatment device.

Background technique

With the gradual development of the automobile industry, the problem of automobile emission pollution has become increasingly serious. The European Union (EU) and the European Economic Commission (ECE) promulgated the fifth-stage emission regulations to restrict vehicle exhaust emissions in 2007, and they were officially implemented in 2008. Index control of particulate matter PM and PN.

In order to cope with the upgrade of regulations, the post-treatment device of diesel oxidation catalyst DOC+particulate filter DPF came into being, and has been promoted in various countries as a mainstream after-treatment technology route. For conventional pollutants such as HC/CO, they are converted into harmless substances such as CO2 and H2O through the oxidation and catalytic ability of DOC. For the control of soot and fine particulate matter, they are mainly collected through the capture function of DPF, and through active The combination of regeneration and passive regeneration is used to eliminate; most of the existing after-treatment devices simply connect each exhaust gas treatment unit in series, and seldom consider further integration and optimization, so all capabilities are not fully utilized during use. A lot of room for improvement.

Contents of the invention

The technical problem to be solved by the utility model is to provide a low-temperature adaptable diesel engine vehicle exhaust treatment device. The treatment device is specially equipped with the relative position of the particle catcher and the differential pressure sensor, and adjusts the direction of the differential pressure pipeline to meet the water flow requirements. , so that the condensed water droplets will not remain in the particle trap and the differential pressure sensor, so that the differential pressure sensor will not affect the differential pressure accuracy due to the ice in itself and the pipeline when the vehicle is driving in a low-temperature area, avoiding the particle trap. damage or failure.

The utility model is realized in the following way: a low-temperature adaptable diesel engine vehicle exhaust gas treatment device includes an engine and a processor body fixedly installed on the engine outer casing, a particle catcher is arranged in the processor body, and a particle catcher is arranged in the engine. The outer shell is also equipped with a differential pressure sensor, the installation height of the differential pressure sensor is higher than that of the particle trap, and the two air pressure ports of the differential pressure sensor are respectively connected to both ends of the particle trap through a differential pressure pipeline. The direction from the differential sensor to the particle trap is positive, and the channel in the differential pressure pipeline transitions smoothly throughout the entire process and requires that the upstream height of any section of the channel is always higher than the downstream height.

The channel in the differential pressure pipeline has no depressions and straight corners throughout, ensuring that the condensed water droplets can directly flow back from the differential pressure sensor to the particle trap.

The end of the differential pressure pipeline close to the particle catcher is made of metal material, and the end of the differential pressure pipeline close to the differential pressure sensor is made of rubber.

An oxidation catalyst is also arranged in the processor body, an oxygen sensor is also installed on the outer shell of the engine, and the sampling port of the oxygen sensor is connected in parallel to the exhaust port of the engine through a sampling pipeline; the exhaust port Oxidation catalytic converter->particulate trap is connected in series in sequence, and temperature sensors are also arranged at both ends of the oxidation catalytic converter.

The oxidation catalytic converter and the particulate trap are fixedly connected as a whole to form the processor body.

The utility model low-temperature adaptable diesel engine vehicle exhaust treatment device specially sets the relative position of the particle catcher and the pressure difference sensor, and adjusts the direction of the pressure difference pipeline to meet the water flow requirement, so that the condensed water droplets will not remain in the particle catcher And in the differential pressure sensor, the differential pressure sensor will not affect the differential pressure accuracy due to the ice in itself and the pipeline when the vehicle is driving in a low-temperature area, avoiding damage or failure of the particle trap, and improving the reliability of the exhaust gas treatment device. Reduced pollutant emissions from vehicles.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the utility model low-temperature adaptation type diesel engine vehicle tail gas treatment device;

In the figure: 1 engine, 2 processor body, 3 particle trap, 4 differential pressure sensor, 5 differential pressure pipeline, 6 oxidation catalyst, 7 oxygen sensor, 8 exhaust port, 9 temperature sensor, 10 sampling pipeline.

detailed description

Below in conjunction with specific embodiment, further set forth the utility model. It should be understood that these embodiments are only used to illustrate the present utility model and are not intended to limit the scope of the present utility model. In addition, it should be understood that after reading the content of the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.

Example 1

As shown in Figure 1, a low-temperature adaptable diesel engine vehicle exhaust gas treatment device includes an engine 1 and a processor body 2 fixedly installed on the outer shell of the engine, the processor body 2 is provided with a particle trap 3, the The outer shell of the engine 1 is also equipped with a differential pressure sensor 4, the installation height of the differential pressure sensor 4 is higher than the particle catcher 3, and the two air pressure ports of the differential pressure sensor 4 are respectively connected to the particulate trap through a differential pressure pipeline 5. The two ends of the trap 3 take the direction from the differential pressure sensor 4 to the particle trap 3 as the positive direction, and the channel in the differential pressure pipeline 5 transitions smoothly throughout the entire process and requires that the upstream height of any section of the channel is always higher than the downstream height, In order to ensure that the water droplets can naturally fall back into the particle trap 3 downstream in the differential pressure pipeline 5 .

Part of the water vapor will always be brought into the exhaust gas, and the water vapor will continue to condense into water droplets along the differential pressure pipeline 5 until the differential pressure sensor 4; and the differential pressure pipeline 5 will affect the accuracy of the measurement results, so it is required that the channel in the differential pressure pipeline 5 has no depressions and straight corners throughout the whole process, so as to ensure that the condensed water droplets can directly flow back along the differential pressure sensor 4 to Particle trap 3 in.

In the utility model, in order to meet the requirements of emission standards, the processor body 2 is also provided with an oxidation catalyst 6, and the outer shell of the engine 1 is also equipped with an oxygen sensor 7, and the sampling of the oxygen sensor 7 The port is connected in parallel to the exhaust port 8 of the engine 1 through the sampling pipeline 10; the exhaust port 8 is connected in series with the oxidation catalyst 6->particle trap 3, and the two ends of the oxidation catalyst 6 are also provided with temperature sensor9.

In this embodiment, considering that the existing standards will become more and more stringent, the oxidation catalyst 6 and the particle catcher 3 will always be needed at the same time. Therefore, for the convenience of installation, the oxidation catalyst 6 and the particle catcher 3 are fixedly connected as one The whole package is packaged inside the casing to form the processor body 2 .

In addition, in this embodiment, considering the factors of weight reduction and reliability, the end of the differential pressure pipeline 5 close to the particle trap 3 is made of metal material, and the end of the differential pressure pipeline 5 close to the differential pressure sensor 4 One end is made of rubber; the metal end can avoid being damaged by the heat emitted by the particle catcher 3 during regeneration, and the rubber part can effectively reduce the dead weight of the entire pipeline, which comprehensively meets the needs of various indicators.

Claims (5)

1. A low-temperature adaptable diesel engine vehicle exhaust gas treatment device, comprising an engine (1) and a processor body (2) fixedly installed on the engine outer casing, a particle catcher (3) is arranged in the processor body (2) ), it is characterized in that: the outer housing of the engine (1) is also equipped with a differential pressure sensor (4), the installation height of the differential pressure sensor (4) is higher than the particle catcher (3), and the differential pressure sensor ( The two air pressure ports of 4) are respectively connected to both ends of the particle trap (3) through a differential pressure pipeline (5), and the direction from the differential pressure sensor (4) to the particle trap (3) is the positive direction, so The channel in the pressure difference pipeline (5) transitions smoothly throughout the whole process and requires that the upstream height of any section of the channel is always higher than the downstream height. 2. The low-temperature adaptable diesel engine vehicle exhaust gas treatment device according to claim 1, characterized in that: the channel in the differential pressure pipeline (5) has no depressions and straight corners throughout the entire process, ensuring that the condensed water droplets can be absorbed from the differential pressure. The sensor (4) flows directly back into the particle trap (3). 3. The low-temperature adaptable diesel engine vehicle exhaust gas treatment device according to claim 1, characterized in that: the end of the differential pressure pipeline (5) close to the particle trap (3) is made of metal material, and the differential pressure pipeline (5) is made of metal material. (5) The end close to the differential pressure sensor (4) is made of rubber. 4. The low temperature adaptable diesel engine vehicle exhaust gas treatment device according to any one of claims 1 to 3, characterized in that: an oxidation catalyst (6) is also arranged in the processor body (2), and the An oxygen sensor (7) is also housed on the outer casing of the engine (1), and the sampling port of the oxygen sensor (7) is connected in parallel on the exhaust port (8) of the engine (1) through a sampling pipeline (10); The exhaust port (8) is connected in series with the oxidation catalyst (6) and the particle trap (3) through a pipeline, and temperature sensors (9) are also provided at both ends of the oxidation catalyst (6). 5. The low-temperature adaptable diesel engine vehicle exhaust gas treatment device according to claim 4, characterized in that: the oxidation catalyst (6) and the particulate trap (3) are fixedly connected to form a processor body (2) as a whole.