CN214092020U

CN214092020U - Automobile exhaust aftertreatment system and automobile

Info

Publication number: CN214092020U
Application number: CN202120061878.1U
Authority: CN
Inventors: 魏天伟; 穆宇; 贾世龙; 刘海松; 佘振成
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-08-31
Anticipated expiration: 2031-01-11

Abstract

The utility model is suitable for an automobile exhaust handles technical field, provides an automobile exhaust after-treatment system and car. This automobile exhaust aftertreatment system includes: the exhaust pipeline arranged in parallel with the GPF and the stop device arranged on the exhaust pipeline are arranged, the engine ECU controls the stop device to be closed, the exhaust pipeline is stopped, and the GPF filters particulate pollutants in the tail gas; the engine ECU controls the stop device to be opened, the exhaust pipeline is opened, and at the moment, the automobile tail gas mainly passes through the exhaust pipeline 1, so that the back pressure of an exhaust system can be reduced, and the oil consumption of the whole automobile is reduced.

Description

Automobile exhaust aftertreatment system and automobile

Technical Field

The utility model belongs to the technical field of automobile exhaust handles, especially, relate to an automobile exhaust aftertreatment system and car.

Background

The particulate matter emission of motor vehicles is always a technical difficulty which is going to be solved by the automobile industry, and along with the rapid increase of the number of motor vehicles in China at present, the particulate matter emission is also rapidly increased, so that the problem that the emission of the particulate matter in the automobile exhaust is increasingly urgent to solve is solved in order to meet the requirements of national regulations and regulations, and also to consider energy conservation and environmental protection.

At present, a Gasoline engine Particulate Filter (GPF) is additionally arranged on a Gasoline engine and is an effective Particulate purification technology, but with the increase of working time, more and more Particulate matters are accumulated on the GPF, the Filter is blocked, the exhaust back pressure is increased, the oil consumption is increased, the normal working state of an engine is influenced, and the engine is seriously damaged.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the utility model provides an automobile exhaust aftertreatment system and car to increase GPF in the automobile exhaust aftertreatment system and lead to the problem that exhaust back pressure risees.

The embodiment of the utility model provides a first aspect provides an automobile exhaust aftertreatment system, include: the engine exhaust system comprises a GPF (general purpose filter) arranged in an engine exhaust pipeline, an exhaust pipeline arranged in parallel with the GPF and a stop device arranged on the exhaust pipeline;

the cut-off device is connected with the engine ECU through a lead.

In one embodiment, the shut-off device is a shut-off valve.

In one embodiment, the shut-off device is a back pressure valve.

In one embodiment, the method further comprises: a heat insulating sleeve;

the heat insulation sleeve is wrapped on the outer wall of the exhaust pipeline.

In one embodiment, the method further comprises: a TWC;

the TWC is disposed between an exhaust gas inlet of an engine exhaust conduit and the GPF.

In one embodiment, the method further comprises: a first PM sensor;

the first PM sensor is disposed before the GPF, and the first PM sensor is connected to the engine ECU.

In one embodiment, the method further comprises: a second PM sensor and controller;

the second PM sensor is disposed before the GPF;

and removing a lead wire for connecting the engine ECU with the cut-off device, wherein one end of the controller is connected with the second PM sensor, and the other end of the controller is connected with the cut-off device.

The embodiment of the utility model provides a first aspect provides an automobile, include: any one of the above embodiments provides the automobile exhaust aftertreatment system.

Compared with the prior art, the embodiment of the utility model beneficial effect who exists is: the embodiment of the utility model provides a, through setting up the exhaust pipe that sets up with GPF parallel connection and setting up the stop device on exhaust pipe, through closing of engine ECU control stop device, the exhaust pipe ends, makes GPF filter the particle pollutant in the tail gas; the engine ECU controls the stop device to be opened, the exhaust pipeline is opened, and at the moment, the automobile tail gas mainly passes through the exhaust pipeline 1, so that the back pressure of an exhaust system can be reduced, and the oil consumption of the whole automobile is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced 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 without inventive labor.

FIG. 1 is a schematic structural diagram of an exhaust aftertreatment system of an automobile according to an embodiment of the invention;

FIG. 2 is a schematic structural diagram of an exhaust aftertreatment system of an automobile according to another embodiment of the invention;

fig. 3 is a schematic structural diagram of an automobile exhaust aftertreatment system according to another embodiment of the invention.

Wherein 1-exhaust line, 2-cut-off, 3-first PM sensor 3, 4-second PM sensor 4, 5-controller.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

In order to explain the technical solution of the present invention, the following description is made by using specific examples.

Example one

Fig. 1 is a schematic diagram of an automobile exhaust gas aftertreatment system provided by the present embodiment, which may include a GPF disposed in an engine exhaust pipe, an exhaust pipe 1 disposed in parallel with the GPF, and a blocking device 2 disposed on the exhaust pipe 1;

the cut-off device 2 is connected with an engine ECU through a lead.

The automobile exhaust aftertreatment system can control the opening and the closing of the exhaust pipeline 1 by controlling the closing device 2. The shut-off device 2 is controlled to be in a closed state by the engine ECU, and particulate pollutants in the exhaust gas are filtered by the GPF. The engine ECU controls the cut-off device 2 to be opened, and at the moment, the automobile tail gas mainly passes through the exhaust pipeline 1, so that the back pressure of an exhaust system can be reduced, and the oil consumption of the whole automobile is reduced.

Alternatively, the shut-off device 2 may be a shut-off valve, or may be a back pressure valve.

The shutoff valve is in a normally closed state, and the engine ECU can control the shutoff valve to open and close. Similarly, the engine may also control the opening and closing of the backpressure valve.

Optionally, the stop valve is connected with the engine ECU through a wire, and when the engine ECU detects that the water temperature of the engine is less than a temperature threshold, the stop valve is controlled to be in a closed state, and the GPF filters the automobile exhaust. When an engine ECU detects that the water temperature of an engine is not less than a temperature threshold value, whether the opening degree of a throttle valve of the engine is smaller than a preset opening degree or not is detected, when the opening degree of the throttle valve of the engine is not smaller than the preset opening degree, a stop valve is controlled to be in a closed state, and automobile exhaust is filtered by GPF. When the opening degree of a throttle valve of the engine is smaller than the preset opening degree, the stop valve is controlled to be opened, and the automobile tail gas flows out through the exhaust pipeline. It should be noted that, at this time, the branch where the GPF is located is not closed, and part of the vehicle exhaust may flow out after being filtered by the GPF, but because the flow rate passing through the GPF is small, the back pressure of the exhaust system is not caused to be too large.

Optionally, the step of detecting whether the water temperature of the engine is smaller than a temperature threshold value is substantially to judge whether the engine is in cold operation. Whether the opening degree of a throttle valve of the engine is smaller than a preset opening degree is detected, and whether the engine is in a heavy-load working stage is substantially judged. Namely, when the engine is in a cold start stage and a heavy-load overtaking stage, the engine particle pollutants have overproof risks, so that GPF is required to be adopted for filtering automobile exhaust.

Optionally, because the last closing means of exhaust pipe passes through the wire and is connected with engine ECU, prevents that automobile exhaust's high temperature from causing the damage of wire, this automobile exhaust aftertreatment system can also include: a heat insulating sleeve; the heat insulation sleeve is wrapped on the outer wall of the exhaust pipeline.

Alternatively, as shown in fig. 1, the exhaust aftertreatment system of the automobile may further include: a Three-way catalytic converter (TWC) disposed between an exhaust inlet of an engine exhaust conduit and the GPF.

TWCs are used to effectively reduce the content of carbon monoxide, hydrocarbons and nitrogen oxides in exhaust gases. TWCs may allow exhaust gases in automotive exhaust after-treatment systems to react more quickly chemically.

Optionally, as shown in fig. 2, the exhaust aftertreatment system of the automobile may further include: a first PM sensor 3.

The first PM sensor 3 is provided before the GPF, and the first PM sensor 3 is connected to the engine ECU.

In this embodiment, first PM sensor 3 detects the concentration of the particulate matter that waits to get into GPF, and engine ECU gathers the concentration that first PM sensor 3 detected to when concentration is greater than preset threshold value, control stop device closes, adopt GPF to filter automobile exhaust, when concentration is not more than preset threshold value, control stop device opens, and automobile exhaust mainly flows out the discharge pipe through the exhaust pipe way.

Optionally, as shown in fig. 3, the exhaust aftertreatment system of the automobile may further include: a second PM sensor 4 and a controller 5;

the second PM sensor 4 is disposed before the GPF;

a wire connecting the engine ECU and the cut-off device is removed, and one end of the controller 5 is connected to the second PM sensor 4, and the other end of the controller 5 is connected to the cut-off device 2.

In this embodiment, the concentration of the particulate matter that waits to get into GPF is detected to second PM sensor 4, and controller 5 gathers the concentration that second PM sensor 4 detected to when concentration is greater than preset threshold value, control stop device closes, adopt GPF to filter automobile exhaust, when concentration is not more than preset threshold value, controller 5 control stop device opens, and automobile exhaust mainly flows the discharge pipe through the exhaust pipe way.

The controller 5 is provided here mainly for controlling the opening and closing of the shut-off device, thereby reducing the workload of the engine ECU and improving the work efficiency.

According to the automobile exhaust aftertreatment system, the exhaust pipeline connected with the GPF in the engine exhaust pipeline in parallel is arranged, and the stop device is arranged on the exhaust pipeline, so that the stop device can be controlled to be opened and closed through the engine ECU or the arranged controller, the back pressure of the exhaust system is reduced, and the oil consumption of the whole automobile is reduced.

The embodiment of the utility model provides a still provide an automobile, include: the automobile exhaust gas after-treatment system in any one of the above embodiments has the beneficial effects of the automobile exhaust gas after-treatment system in any one of the above embodiments.

The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. An automotive exhaust aftertreatment system, comprising: the engine exhaust system comprises a GPF (general purpose filter) arranged in an engine exhaust pipeline, an exhaust pipeline arranged in parallel with the GPF and a stop device arranged on the exhaust pipeline;

the cut-off device is connected with the engine ECU through a lead.

2. The automotive exhaust aftertreatment system of claim 1, wherein the shutoff device is a shutoff valve.

3. The automotive exhaust aftertreatment system of claim 1, wherein the shutoff device is a backpressure valve.

4. The automotive exhaust aftertreatment system of claim 1, further comprising: a heat insulating sleeve;

5. The automotive exhaust aftertreatment system of claim 1, further comprising: a TWC;

6. The automotive exhaust aftertreatment system of any one of claims 1-5, further comprising: a first PM sensor;

7. The automotive exhaust aftertreatment system of any one of claims 1-5, further comprising: a second PM sensor and controller;

the second PM sensor is disposed before the GPF;

8. An automobile, comprising: the automotive exhaust aftertreatment system of any one of the preceding claims 1 to 7.