Gasoline engine particulate collector, method and vehicle

Abstract

A gasoline engine particulate collector, method and automobile belong to the technical field of engine exhaust treatment, and solve the problem that the existing device has a large exhaust back pressure, which leads to increased fuel consumption and reduced power. The collector includes an exhaust gas collection device, a particulate matter treatment device and an exhaust gas emission device; the exhaust gas collection device includes an exhaust pipe and a first spiral; the particulate matter treatment device includes a filter element, a second spiral and a negative pressure chamber; the exhaust gas emission device includes a negative pressure chamber air intake and a venturi tube; the exhaust pipe is provided with a first spiral; the filter element is provided with a second spiral, and negative pressure chambers are provided on both sides of the filter element; the negative pressure chamber air intake is provided on the venturi tube; the exhaust pipe is connected to the filter element, and the filter element is connected to the venturi tube.

Description

Technical Field

[0001] The present invention relates to the technical field of engine exhaust treatment, and in particular to a gasoline engine particulate collector, a method and a vehicle. Background Art

[0002] In the face of stricter regulations on gasoline engine particulate matter emissions, the current mainstream solutions are as follows: Figure 1 The gasoline engine particulate filter (GPF) shown in the figure mainly uses wall-flow honeycomb ceramic as a carrier. There are many parallel axial honeycomb channels in the carrier body. One of the two adjacent channels has only an inlet open, and the other has only an outlet open. Exhaust gas flows into the open inlet channel and is discharged through the porous wall of the GPF carrier to the adjacent channel.

[0003] However, the existing device has the following defects: due to the large exhaust back pressure, fuel consumption increases and power decreases. Summary of the invention

[0004] The invention solves the problem of increased fuel consumption and decreased power caused by large exhaust back pressure in the existing device.

[0005] A gasoline engine particulate filter according to the present invention comprises an exhaust gas collecting device, a particulate matter processing device and an exhaust gas emission device;

[0006] The exhaust gas collecting device comprises an exhaust pipe 1 and a first spiral 5;

[0007] The particle treatment device comprises a filter element 6, a second spiral device 7 and a negative pressure chamber 8;

[0008] The tail gas discharge device comprises a negative pressure chamber air intake port 10 and a venturi tube 11;

[0009] The exhaust pipe 1 is provided with a first spiral 5;

[0010] A second screw device 7 is provided in the filter element 6, and negative pressure chambers 8 are provided on both sides of the filter element 6;

[0011] The negative pressure chamber air intake port 10 is arranged on the venturi tube 11;

[0012] The exhaust pipe 1 is connected to the filter element 6 , and the filter element 6 is connected to the venturi tube 11 .

[0013] Further, in one embodiment of the present invention, the exhaust gas collection device further comprises a fresh air inlet 2, a first temperature sensor 3 and a solenoid valve 4;

[0014] The fresh air inlet 2 and the first temperature sensor 3 are both arranged on the exhaust pipe 1;

[0015] The fresh air inlet 2 is provided with a solenoid valve 4;

[0016] The solenoid valve 4 is controlled by a controller.

[0017] Furthermore, in one embodiment of the present invention, when the temperature of the exhaust pipe 1 is higher than 550° C., the solenoid valve 4 will be automatically opened by the controller.

[0018] Further, in one embodiment of the present invention, the particle treatment device further includes an air intake pipe 9, a two-way air pump 12, a second temperature sensor 13, a pressure sensor 14 and a flow rate sensor 15;

[0019] The air intake pipe 9 is provided with a bidirectional air pump 12, a second temperature sensor 13, a pressure sensor 14 and a flow rate sensor 15;

[0020] The air intake pipe 9 connects the negative pressure chamber 8 with the negative pressure chamber air intake port 10;

[0021] The bidirectional air pump 12 is controlled by a controller.

[0022] Furthermore, in one embodiment of the present invention, the gas extraction pipe 9 is provided with a second temperature sensor 13, a pressure sensor 14 and a flow rate sensor 15, which can calculate the gas flow in the gas extraction pipe 9 in real time;

[0023] The calculation formula of the gas flow in the gas extraction pipe 9 is:

[0024] Q=v*S*(P*10+1)*(T+20) / (T+t), where Q is the exhaust flow rate, T is the absolute temperature, t is the gas temperature measured by the temperature sensor 13, P is the gas pressure measured by the pressure sensor 14, and V is the gas flow rate measured by the flow rate sensor 15.

[0025] Furthermore, in one embodiment of the present invention, when the gas flow in the air intake pipe 9 is obtained by querying the engine exhaust temperature and the engine total exhaust flow table, the air intake pipe 9 does not need to be provided with a second temperature sensor 13, a pressure sensor 14 and a flow rate sensor 15.

[0026] Further, in one embodiment of the present invention, the controller is capable of monitoring the total gas flow in the exhaust pipe 1 and the gas flow in the gas intake pipe 9 in real time;

[0027] When the gas flow in the gas intake pipe 9 is less than the total gas flow in the exhaust pipe 1*0.2, the bidirectional air pump 12 starts to operate;

[0028] If the total gas flow in the exhaust pipe 1*0.2<the gas flow in the gas intake pipe 9<the total gas flow in the exhaust pipe 1*0.3, the bidirectional air pump 12 stops running.

[0029] Further, in one embodiment of the present invention, the exhaust gas emission device is a bell-shaped gas nozzle;

[0030] The negative pressure chamber air inlet 10 is a bell-shaped air nozzle.

[0031] The gasoline engine particulate capture method of the present invention is implemented by using a gasoline engine particulate capture device described in the above method, and is characterized in that the method specifically comprises:

[0032] After the engine exhaust gas containing particulate matter passes through the first spiral 5 and the second spiral 7, the engine exhaust gas containing particulate matter continues to rotate due to inertia, wherein the particulate matter in the engine exhaust gas will gradually separate from the airflow and then contact the filter element 6. At the same time, due to the vacuum effect of the negative pressure chamber 8, the particulate matter is adsorbed on the filter element 6, thereby completing the separation of the particulate matter in the engine exhaust gas.

[0033] The present invention provides a car, wherein the gasoline engine particulate collector described in the method is installed inside the car.

[0034] The present invention solves the problem of high fuel consumption and reduced power caused by high exhaust back pressure in existing devices. Specific beneficial effects include:

[0035] 1. The gasoline engine particulate filter of the present invention absorbs particulate emissions through the side wall, effectively solving the problem of increased fuel consumption and reduced power due to low exhaust back pressure;

[0036] 2. In the gasoline engine particulate filter of the present invention, when the exhaust gas flows through the venturi tube, the pressure at the thinnest part of the venturi tube is the smallest, so a pressure lower than that at the filter element is generated, and at the same time, the air nozzle of the bell mouth of the exhaust gas emission device further strengthens the negative pressure near the air outlet of the air nozzle, so that the engine exhaust gas flows through the barrel filter element, thereby achieving the purification of particulate matter;

[0037] 3. A gasoline engine particulate filter according to the present invention has a two-way air pump installed in the air intake pipe. The two-way air pump constantly monitors the total gas flow in the exhaust pipe and the gas flow in the air intake pipe during the operation of the engine. When the gas flow in the air intake pipeline is less than the total gas flow in the exhaust pipe*0.2, the two-way air pump operates and automatically adjusts the air pump power to maintain the total gas flow in the exhaust pipe*0.2<the gas flow in the air intake pipeline<the total gas flow in the exhaust pipe*0.3, then the two-way air pump stops operating, that is, the gas flow in the air intake pipeline is ensured to be between 20% and 30% of the total gas flow in the exhaust, thereby ensuring the particulate matter filtering effect;

[0038] 4. The gasoline engine particulate filter of the present invention can flexibly select the proportion of gas entering the air intake pipeline according to the engine operating conditions due to the different concentrations of particulate matter under different engine operating conditions. When the concentration of particulate matter in the engine exhaust is high, the proportion of gas entering the air intake pipeline is appropriately increased, and vice versa, the proportion is reduced to achieve a balance between exhaust purification effect and energy saving effect;

[0039] 5. A gasoline engine particulate filter according to the present invention is provided with a temperature sensor and a fresh air inlet installed in the exhaust pipe, and a solenoid valve installed on the fresh air inlet. When the exhaust pipe temperature is higher than 550°C, the solenoid valve is automatically opened. Due to the negative pressure generated by the trumpet-shaped negative pressure chamber air intake in the exhaust flow field, fresh air automatically enters the exhaust pipe. In a high temperature and oxygen-containing environment, particulate matter in the filter element is burned, thereby finally achieving a cleaning function.

[0040] 6. The gasoline engine particulate filter described in the present invention can realize the filter element back-blowing function. Its main function is to clean the plugged material in the filter element. When the engine runs for 10,000 kilometers and the exhaust temperature is higher than 650°C, the air pump reverses and pumps air at full speed. At the same time, the solenoid valve of the fresh air inlet is opened, and the back-blown particulate matter is burned under the action of high temperature and fresh air to prevent it from entering the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0042] Figure 1 It is a schematic diagram of the GPF filtering particulate matter described in the background technology;

[0043] Figure 2 is a structural diagram of a gasoline engine particulate filter according to a specific implementation method;

[0044] Figure 3 It is a structural diagram of the trumpet-shaped negative pressure chamber air intake port described in the specific implementation method;

[0045] In the figure, 1 is an exhaust pipe, 2 is a fresh air inlet, 3 is a first temperature sensor, 4 is a solenoid valve, 5 is a first screw, 6 is a filter element, 7 is a second screw, 8 is a negative pressure chamber, 9 is an air intake pipe, 10 is an air intake port of the negative pressure chamber, 11 is a venturi tube, 12 is a two-way air pump, 13 is a second temperature sensor, 14 is a pressure sensor, and 15 is a flow rate sensor. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe various embodiments of the present invention in conjunction with the accompanying drawings. The embodiments described with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0047] A gasoline engine particulate filter according to this embodiment, the filter comprises an exhaust gas collection device, a particulate matter treatment device and an exhaust gas emission device;

[0048] The exhaust gas collecting device comprises an exhaust pipe 1 and a first spiral 5;

[0049] The particle treatment device comprises a filter element 6, a second spiral device 7 and a negative pressure chamber 8;

[0050] The tail gas discharge device comprises a negative pressure chamber air intake port 10 and a venturi tube 11;

[0051] The exhaust pipe 1 is provided with a first spiral 5;

[0052] A second screw device 7 is provided in the filter element 6, and negative pressure chambers 8 are provided on both sides of the filter element 6;

[0053] The negative pressure chamber air intake port 10 is arranged on the venturi tube 11;

[0054] The exhaust pipe 1 is connected to the filter element 6 , and the filter element 6 is connected to the venturi tube 11 .

[0055] In this embodiment, the exhaust gas collection device further includes a fresh air inlet 2, a first temperature sensor 3 and a solenoid valve 4;

[0056] The fresh air inlet 2 and the first temperature sensor 3 are both arranged on the exhaust pipe 1;

[0057] The fresh air inlet 2 is provided with a solenoid valve 4;

[0058] The solenoid valve 4 is controlled by a controller.

[0059] In this embodiment, when the temperature of the exhaust pipe 1 is higher than 550° C., the solenoid valve 4 will be automatically opened under the control of the controller.

[0060] In this embodiment, the particle treatment device further includes an air intake pipe 9, a two-way air pump 12, a second temperature sensor 13, a pressure sensor 14 and a flow rate sensor 15;

[0061] The air intake pipe 9 is provided with a bidirectional air pump 12, a second temperature sensor 13, a pressure sensor 14 and a flow rate sensor 15;

[0062] The air intake pipe 9 connects the negative pressure chamber 8 with the negative pressure chamber air intake port 10;

[0063] The bidirectional air pump 12 is controlled by a controller.

[0064] In this embodiment, the gas intake pipe 9 is provided with a second temperature sensor 13, a pressure sensor 14 and a flow rate sensor 15, which can calculate the gas flow in the gas intake pipe 9 in real time;

[0065] The calculation formula of the gas flow in the gas extraction pipe 9 is:

[0066] Q=v*S*(P*10+1)*(T+20) / (T+t), where Q is the exhaust flow rate, T is the absolute temperature, t is the gas temperature measured by the temperature sensor 13, P is the gas pressure measured by the pressure sensor 14, and V is the gas flow rate measured by the flow rate sensor 15.

[0067] In this embodiment, when the gas flow in the air intake pipe 9 is obtained by querying the engine exhaust temperature and the engine total exhaust flow table, the air intake pipe 9 does not need to be provided with a second temperature sensor 13, a pressure sensor 14 and a flow rate sensor 15.

[0068] In this embodiment, the controller can monitor the total gas flow in the exhaust pipe 1 and the gas flow in the gas intake pipe 9 in real time;

[0069] When the gas flow in the gas intake pipe 9 is less than the total gas flow in the exhaust pipe 1*0.2, the bidirectional air pump 12 starts to operate;

[0070] If the total gas flow in the exhaust pipe 1*0.2<the gas flow in the gas intake pipe 9<the total gas flow in the exhaust pipe 1*0.3, the bidirectional air pump 12 stops running.

[0071] In this embodiment, the exhaust gas discharge device is a bell-shaped air nozzle;

[0072] The negative pressure chamber air inlet 10 is a bell-shaped air nozzle.

[0073] A gasoline engine particulate capture method described in this embodiment is implemented by using a gasoline engine particulate capture device described in the above embodiment. The method is specifically as follows:

[0074] After the engine exhaust gas containing particulate matter passes through the first spiral 5 and the second spiral 7, the engine exhaust gas containing particulate matter continues to rotate due to inertia, wherein the particulate matter in the engine exhaust gas will gradually separate from the airflow and then contact the filter element 6. At the same time, due to the vacuum effect of the negative pressure chamber 8, the particulate matter is adsorbed on the filter element 6, thereby completing the separation of the particulate matter in the engine exhaust gas.

[0075] The automobile described in this embodiment has the gasoline engine particulate filter described in the above embodiment installed inside the automobile.

[0076] This embodiment is based on a gasoline engine particulate capture method according to the present invention, combined with Figure 2 and Figure 3 To better understand this implementation, a practical implementation is provided:

[0077] Particulate emission purification function: The engine exhaust containing particulate matter begins to rotate after passing through the first spiral 5 and the second spiral 7. The particulate matter in the exhaust gas is gradually separated to the outside of the airflow due to inertia and contacts the filter element 6. At the same time, it is adsorbed on the filter element due to the vacuum effect of the negative pressure chamber 8, thereby finally achieving the effect of separating the particulate matter in the exhaust gas.

[0078] The vacuum source of the negative pressure chamber 8: when the exhaust gas flows through the venturi tube 11, the pressure at the thinnest part of the venturi tube 11 is the smallest, so it will generate a pressure lower than that at the filter element 6. At the same time, the bell-shaped air nozzle designed for the exhaust gas emission device will further enhance the negative pressure near the air nozzle outlet, allowing the engine exhaust gas to flow through the barrel filter element 6 to achieve shape particle purification.

[0079] A second temperature sensor 13, a pressure sensor 14 and a gas flow rate sensor 15 are installed in the middle of the gas extraction pipe 9. The gas flow rate in the gas extraction pipe 9 is calculated in real time according to the temperature in the gas extraction pipe 9, the pressure pipe diameter and the gas flow rate. The calculation formula is as follows:

[0080] Q=v*S*(P*10+1)*(T+20) / (T+t), where Q is the exhaust flow rate (L / s), V is the gas flow rate measured by the flow rate sensor 15 (m / s), P is the gas pressure measured by the pressure sensor 14 (MPa), T is the absolute temperature (273.15), and t is the gas temperature measured by the temperature sensor 13 (°C).

[0081] In addition, the gas flow in the air intake pipe 9 can also be obtained by looking up the engine exhaust temperature and the total exhaust flow, as shown in Table 1. In this case, it is not necessary to install the second temperature sensor 13, the pressure sensor 14 and the gas flow rate sensor 15 in the air intake pipe 9.

[0082] Table 1

[0083]

[0084] A two-way air pump 12 is installed in the middle of the air intake pipe 9. During the operation of the engine, the total gas flow in the exhaust pipe 1 and the gas flow in the air intake pipe 9 are constantly monitored. When the gas flow in the air intake pipe 9 is less than the total gas flow in the exhaust pipe 1*0.2, the two-way air pump 12 is operated and the power of the two-way air pump is automatically adjusted to maintain:

[0085] Total gas flow in exhaust pipe 1*0.2<gas flow in air intake pipe 9<total gas flow in exhaust pipe 1*0.3. That is, the gas flow in air intake pipe 9 is guaranteed to be between 20% and 30% of the total gas flow in exhaust pipe 1, thus ensuring the particulate matter filtering effect.

[0086] In addition, since the concentration of particulate matter varies under different engine operating conditions, the proportion of gas entering the air intake pipe 9 can be flexibly selected according to the engine operating conditions. When the concentration of particulate matter in the exhaust gas is high, the proportion of gas entering the air intake pipe 9 is appropriately increased, and vice versa, the proportion is reduced, so as to achieve a balance between the exhaust gas purification effect and the energy saving effect.

[0087] In addition, the combustion of the filter element particles can be realized, and the filter element cleaning and regeneration can be realized: the first temperature sensor 3 and the fresh air inlet 2 are installed on the exhaust pipe 1, and the solenoid valve 4 is installed on the fresh air inlet 2. When the exhaust temperature is higher than 550°C, the air inlet solenoid valve 4 is automatically opened, and due to the negative pressure generated by the trumpet-shaped air inlet in the exhaust flow field, fresh air automatically enters the exhaust pipe 1, and the particles in the filter element 6 are burned in a high temperature and oxygen-containing environment, and finally the cleaning function is realized.

[0088] In addition, the back-blowing function of the filter element 6 can be realized, and its main function is to clean the blocked material in the filter element 6. When the engine runs 10,000 kilometers and the exhaust temperature is higher than 650°C, the two-way air pump 12 reversely pumps air at full speed. At the same time, the solenoid valve 4 of the fresh air inlet 2 is opened, and the back-blown particles are burned under the action of high temperature and fresh air to prevent them from entering the environment.

[0089] The solenoid valve 4 and the two-way air pump 12 are both controlled by the engine control computer.

[0090] The gasoline engine particulate filter, method and automobile proposed in the present invention are introduced in detail above. The principle and implementation mode of the present invention are explained in detail by using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A gasoline engine particulate capture method, the method is implemented by using a gasoline engine particulate capture device, characterized in that: The trap includes an exhaust gas collection device, a particulate matter treatment device and an exhaust gas emission device; The exhaust gas collecting device comprises an exhaust pipe (1) and a first spiral device (5); The particle treatment device comprises a filter element (6), a second spiral device (7) and a negative pressure chamber (8); The tail gas discharge device comprises a negative pressure chamber air intake port (10) and a venturi tube (11); A first spiral device (5) is provided in the exhaust pipe (1); A second screw device (7) is provided in the filter element (6), and negative pressure chambers (8) are provided on both sides of the filter element (6); The negative pressure chamber air intake port (10) is arranged on the venturi tube (11); The exhaust pipe (1) is connected to the filter element (6), and the filter element (6) is connected to the Venturi tube (11); The particle processing device further comprises an air intake pipe (9), a two-way air pump (12), a second temperature sensor (13), a pressure sensor (14) and a flow rate sensor (15); The air intake pipe (9) is provided with a bidirectional air pump (12), a second temperature sensor (13), a pressure sensor (14) and a flow rate sensor (15); The air intake pipe (9) connects the negative pressure chamber (8) with the negative pressure chamber air intake port (10); The bidirectional air pump (12) is controlled by a controller; The gas intake pipe (9) is provided with a second temperature sensor (13), a pressure sensor (14) and a flow rate sensor (15) which can calculate the gas flow in the gas intake pipe (9) in real time; The method is specifically as follows: After the engine exhaust gas containing particulate matter passes through the first spiral device (5) and the second spiral device (7), the engine exhaust gas containing particulate matter continues to rotate due to inertia, wherein the particulate matter in the engine exhaust gas is gradually separated to the outside of the airflow to contact the filter element (6), and at the same time, due to the vacuum effect of the negative pressure chamber (8), the particulate matter is adsorbed on the filter element (6), thereby completing the separation of the particulate matter in the engine exhaust gas; The controller is capable of monitoring the total gas flow in the exhaust pipe (1) and the gas flow in the gas intake pipe (9) in real time; When the gas flow rate in the gas intake pipe (9) is less than the total gas flow rate in the exhaust pipe (1)*0.2, the bidirectional air pump (12) starts to operate; If the total gas flow rate in the exhaust pipe (1)*0.2<the gas flow rate in the gas intake pipe (9)<the total gas flow rate in the exhaust pipe (1)*0.3, the bidirectional air pump (12) stops running.

2. A gasoline engine particulate capture method according to claim 1, characterized in that: The exhaust gas collection device further comprises a fresh air inlet (2), a first temperature sensor (3) and a solenoid valve (4); The fresh air inlet (2) and the first temperature sensor (3) are both arranged on the exhaust pipe (1); The fresh air inlet (2) is provided with a solenoid valve (4); The solenoid valve (4) is controlled by a controller.

3. A gasoline engine particulate capture method according to claim 2, characterized in that: When the temperature of the exhaust pipe (1) is higher than 550° C., the solenoid valve (4) will be automatically opened under the control of the controller.

4. A gasoline engine particulate capture method according to claim 1, characterized in that: When the gas flow rate in the gas intake pipe (9) is obtained by querying the engine exhaust temperature and the engine total exhaust flow table, the gas intake pipe (9) does not need to be provided with a second temperature sensor (13), a pressure sensor (14) and a flow rate sensor (15).

5. A gasoline engine particulate capture method according to claim 1, characterized in that: The exhaust gas emission device is a bell-shaped air nozzle; The negative pressure chamber air intake port (10) is a bell-shaped air nozzle.

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