Exhaust system component for replacing a particulate filter

Abstract

An exhaust system component comprising a tubular housing (7) for passing exhaust gases of an internal combustion engine, wherein the tubular housing (7) comprises a first pressure intake (3) which protrudes from the outside into the tubular housing (7) with its opening directed towards the exhaust gas flow (2) so that the exhaust gas flow (2) can form a back pressure in the first pressure intake (3), and a second pressure intake (4) which protrudes from the outside into the tubular housing (7) with its opening directed towards the exhaust gas flow so that a lower pressure than the dynamic pressure of the first pressure intake (3) can be formed therein, wherein the first pressure intake (3) and the second pressure intake (4) are provided with an interface on the outside of the tubular housing, which interface can be connected to a control unit of the vehicle.

Description

Technical Field

[0001] The present invention relates to a component of an internal combustion engine exhaust system, the component comprising a tubular housing. Background Technology

[0002] Particulate filters are commonly used in internal combustion engines to remove soot and other fine particles from exhaust gases or air. Measurement points upstream and downstream of the particulate filter play a crucial role in monitoring filter condition and exhaust system efficiency.

[0003] Particulate filters are made of porous materials (such as ceramic or metal mesh) that trap particulates as gas flows through them.

[0004] One or more pressure sensors are typically used at the upstream and downstream measurement points of the filter, and sometimes temperature sensors are also used to measure pressure.

[0005] At this point, the pressure difference between the inlet and outlet sides can be determined.

[0006] Temperature sensors help assess operational status, such as during regeneration.

[0007] The exhaust gas flows through the particulate filter.

[0008] Particulate matter such as smoke and dust is trapped in the filter, while the purified gas is discharged.

[0009] Upstream of the filter, the first measuring point measures the pressure, and if necessary, also measures the temperature of the unfiltered exhaust gas.

[0010] Downstream of the filter, a second measuring point measures the pressure, and if necessary, the temperature of the clean exhaust gas.

[0011] Differential pressure is the pressure difference between the filter inlet and outlet.

[0012] A low pressure differential indicates a clean filter. A high pressure differential indicates a clogged filter that requires cleaning (regeneration).

[0013] If the pressure differential is high, the control unit will trigger regeneration to burn off particles (such as soot) that have accumulated in the filter.

[0014] Japanese Patent Publication No. JP2013-117204A, German Patent Publication No. DE102008014528A1, and Chinese Patent Publication No. CN114183226A disclose particulate filters and the arrangement of their sensor tubes.

[0015] Regeneration can be triggered automatically (by high exhaust gas temperature) or manually.

[0016] The purpose of this invention is to provide a sensor arrangement or measurement point or system that can replace a particulate filter without replacing the control unit or issuing erroneous signals. Summary of the Invention

[0017] According to the technical solution disclosed herein, the present invention solves the above-mentioned problems.

[0018] This invention includes an exhaust system assembly comprising a tubular housing for exhaust gases discharged from an internal combustion engine. Typically, this component is a pipe or an extended pipe arranged in the exhaust duct, often serving as a replacement for a particulate filter, with appropriate transition devices, and possibly clamps and sleeves.

[0019] The tubular housing includes a first pressure inlet pipe extending into the tubular housing from the outside. The first pressure inlet pipe has a first opening located inside the tubular housing. The first opening faces the exhaust gas flow, so that the exhaust gas flow can create back pressure in the pressure inlet pipe. A second opening of the first pressure inlet pipe is located outside the tubular housing and is connected to a control device.

[0020] Furthermore, the invention includes a second pressure inlet pipe extending from the outside into the tubular housing, the opening of which is aligned with the exhaust gas flow direction, thereby creating a pressure therein that is lower than the dynamic pressure of the first pressure inlet pipe. Like the first pressure inlet pipe, the second outlet is also located outside the tubular housing and connected to a control device.

[0021] The opening direction of the first pressure intake pipe is opposite to the direction of the exhaust gas flow inside the tubular shell, so some of the exhaust gas flow will be forced into the opening of the first pressure intake pipe.

[0022] Ideally, an axis should pass through the center of the first pressure intake pipe opening and be parallel to the exhaust gas flow to generate maximum pressure.

[0023] In one possible implementation, the opening of the second pressure intake pipe is directed in the direction of exhaust gas flow in the tubular housing, so that no pressure is generated or only a low pressure is generated in the second pressure intake pipe, because the exhaust gas does not flow directly or only partially into the second pressure intake pipe.

[0024] In a preferred embodiment, the axis passing through the center of the second pressure inlet pipe opening is parallel to the exhaust gas flow.

[0025] The sizes of the first and / or second pressure inlet pipe openings, the directions of the first and / or second pressure inlet pipe openings relative to the exhaust gas flow, and / or the positions of the pressure inlet pipes within the tubular housing are matched to ensure that the pressure differential is recognized as permissible by the control unit. The diameter of the pressure inlet pipe can be varied. A funnel-shaped pressure inlet pipe is also possible. Alternatively, bends or angles can be formed in the pressure inlet pipe, or similar structures can be incorporated into the adjustable member to reduce restrictions on the pressure inlet pipe passage.

[0026] The first and / or second pressure inlet pipes within the housing can be bent within a range of 0 to 90 degrees to be opposite to or the same as the exhaust gas flow direction. This allows for the generation of different pressure differentials to suit the control device.

[0027] In one possible implementation, the position and / or orientation of the first or second pressure inlet pipe within the tubular housing can be adjusted and fixed to set different pressure differentials. This can be achieved by securing the pressure inlet pipe to the housing using nuts and locking nuts. Alternatively, adjusting devices can be used to change the opening or flow rate of the pressure inlet pipe.

[0028] In a preferred embodiment, the control unit is a control unit for the particulate filter.

[0029] In one possible implementation, the catalytic converter and / or metal substrate are arranged in a tubular housing between the first and second pressure inlet pipes, through which exhaust gas flows.

[0030] In one possible implementation, the housing has the external shape and connection method of a particulate filter, and therefore can be used as a replacement part.

[0031] This prevents the control unit from sending incorrect signals when the vehicle no longer operates properly after the original equipment manufacturer's (OEM) particulate filter has been removed (e.g., for testing purposes or track operation).

[0032] To solve this problem, a pressure inlet pipe aligned with the exhaust gas flow direction can be designed at the pressure monitoring point. The shape of the pipe can vary depending on the specific system.

[0033] There can be an element that increases dynamic pressure (high-performance catalytic converter or other) between the measurement points. Measurement points 1 and 2 can be located individually or together within the element that increases dynamic pressure (through orifices, etc.). However, it can also be a continuous pipe or a similar hollow body.

[0034] The pressure monitoring point is connected to the vehicle manufacturer's control unit (such as the original particulate filter) and provides it with measurable values ​​that are within the measurement range of the original particulate filter.

[0035] No further reprogramming or any other changes to the software are required. Attached Figure Description

[0036] Figure 1 What is shown is an exhaust system with a control unit and two pressure intake pipes upstream and downstream of the particulate filter;

[0037] Figure 2 The diagram shows an exhaust system with two pressure intake pipes on its control unit, located upstream and downstream of the vent pipe, respectively.

[0038] Figure 3 Showing different arrangements and shapes of pressure inlet pipes;

[0039] Figure 4 The arrangement of the pressure inlet pipe on the inner substrate of the particulate filter is shown. Detailed Implementation

[0040] Figure 1 The exhaust system 1 with exhaust gas flow 2 is shown, indicated by an arrow. Within the exhaust gas flow, there is a pressure inlet pipe 3 as measurement point 1 and a pressure inlet pipe 4 as measurement point 2. The two pressure inlet pipes are connected by a control unit 5. A metal substrate or ceramic 6 is mounted within the tubular housing of the particulate filter. Alternatively, a continuous tube 7 can be used, such as... Figure 2 As shown.

[0041] The pressure monitoring point is designed with pressure inlet pipes 3 and 4, which are arranged in the exhaust gas flow 2 in different directions.

[0042] The shape and orientation of pipes can vary depending on the system. Figure 3 ).

[0043] Elements that increase dynamic pressure, such as metal substrates, can be located between measurement points. Figure 1 Alternatively, it could be a high-performance catalytic converter. For example... Figure 4 As shown, measurement points 1 and 2 can also be located individually or together within the dynamic pressure amplification element, with the pressure inlet pipe leading into the element through the orifice.

[0044] However, it can also be a continuous tube 7 or a similar hollow body, such as Figure 2 As shown.

[0045] Pressure intake pipes 3 and 4 (as with the original particulate filter) connect to the car manufacturer's control unit 5 and provide it with measurable values ​​that are within the range of the original OEM particulate filter.

[0046] Figure 3 The different arrangements and designs of the pressure inlet pipe 3 or 4 are shown. It can be bent at a 90-degree angle, or at an approximately 45-degree angle, or extend directly into the housing without any angle.

[0047] No further reprogramming or any other changes to the software are required.

[0048] Reference Symbol List

[0049] 1. Exhaust gas system

[0050] 2 Exhaust gas flow rate

[0051] 3. Pressure Inlet Pipe Measurement Point 1

[0052] 4. Pressure Inlet Pipe Measurement Point 2

[0053] 5. Control units of car manufacturers

[0054] 6 metal substrate

[0055] 7 Continuous Pipeline

Claims

1. An exhaust system component comprising a tubular housing (7) for an internal combustion engine exhaust passage, wherein the tubular housing (7) comprises: A first pressure intake pipe (3) extends from the outside into the tubular housing (7), the opening of the first pressure intake pipe (3) facing the exhaust gas flow (2) so that the exhaust gas flow (2) creates back pressure in the first pressure intake pipe (3); and A second pressure intake pipe (4) has an opening within the tubular housing (7) aligned with the exhaust gas flow direction, thereby creating a pressure therein that is lower than the dynamic pressure of the first pressure intake pipe (3). The first pressure intake pipe (3) and the second pressure intake pipe (4) are provided with interfaces outside the tubular housing (7), and these interfaces can be connected to the vehicle's control unit. The first pressure inlet pipe (3) or the second pressure inlet pipe (4) has an opening size, an opening direction relative to the waste gas flow (2), or a position of the pressure inlet pipe within the tubular housing (7) that are matched to each other, so that the control unit can still identify the differential pressure as within the allowable range even if a particulate filter is not installed; at the same time, the tubular housing (7) has the shape and interface of the particulate filter, so that it can be used as a replacement part, wherein the opening of the first pressure inlet pipe (3) faces the opposite direction of the waste gas flow (2) within the tubular housing (7), so that part of the waste gas flow (2) is forced into the opening.

2. The exhaust system component according to claim 1, characterized in that, The axis of the opening center of the first pressure inlet pipe (3) is parallel to the exhaust gas flow (2).

3. The exhaust system component according to claim 1 or 2, characterized in that, The opening of the second pressure inlet pipe (4) points in the direction of the exhaust gas flow (2) inside the tubular housing (7), so no pressure or low pressure is generated inside the second pressure inlet pipe (4).

4. The exhaust system component according to claim 3, characterized in that, The axis of the opening center of the second pressure inlet pipe (4) is parallel to the exhaust gas flow (2).

5. The exhaust system component according to claim 1 or 2, characterized in that, The first pressure inlet pipe (3) or the second pressure inlet pipe (4) within the tubular housing (7) has a bend, the angle of which is in the range of 0 to 90 degrees, so that the opening of the first pressure inlet pipe (3) or the second pressure inlet pipe (4) faces the direction of the exhaust gas flow (2) or is opposite to the direction of the exhaust gas flow (2).

6. The exhaust system component according to claim 1 or 2, characterized in that, The position or orientation of the first pressure inlet pipe (3) or the second pressure inlet pipe (4) in the tubular housing (7) can be adjusted and fixed in order to set different pressure differentials.

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