Three-way catalyst pressure sensor tube
By connecting the heating pipe in the three-way catalyst pressure sensor tube, hot coolant is introduced into the pressure sensor tube to heat the pressure sensor tube, the problem of the pressure sensor tube prone to freezing in the cold northern areas is solved, ensuring the reception of the pressure difference signal and the normal operation of the car.
Patent Information
- Application Number
- CN202420849843.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-04-23
AI Technical Summary
In cold northern areas, the pressure sensor tube of the three-way catalyst is prone to freezing, resulting in the pressure difference signal being unable to be received, and the car's fault light is on, affecting the normal driving of the car.
A heating pipe is connected to the pressure sensor tube body along its length direction. The two ends of the heating pipe are in communication with the coolant tank of the engine. The outer wall of the pressure sensor tube is heated through the circulating hot coolant to melt the frost.
It effectively avoids the pressure sensor tube icing, ensures the reception of pressure differential signal, prevents the car from malfunctioning lights, and ensures the normal driving of the car.
Smart Images
Figure CN222650055U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile three-way catalytic converter manufacturing, in particular to a three-way catalytic converter pressure sensor tube. Background Art
[0002] Catalyst pressure sensor tubes are usually used to monitor the pressure changes inside the catalyst. When using the catalyst pressure sensor tube, it needs to be installed on the catalyst and ensure that it is connected to the pressure channel inside the catalyst. The catalyst is an important part of the engine emission control system. Its working state directly affects the performance and emission level of the engine. By monitoring the pressure changes of the catalyst, the engine operating parameters can be adjusted in time to optimize engine performance and reduce emissions. At present, the connection structure of the catalyst pressure sensor tube is as follows: Figure 1 As shown, it is composed of three parts: a sensor nut, a pressure sensor tube 101 and a locking bolt 102 sleeved on the pressure sensor tube. One end of the pressure sensor tube sleeved with the locking bolt is a bent portion of the limited locking bolt. The installation method is: install the pressure sensor tube with the locking bolt end on the catalyst connecting bolt and tighten the sensor nut with a torque wrench. Due to the winter weather, the temperature in the northern region is very cold. When the gas in the three-way catalytic converter enters the pressure sensor tube, it is easy to frost or form small ice residues in the pressure sensor tube due to the presence of a certain amount of moisture in the exhaust gas. The gasoline engine has a higher efficiency and generates more heat, which can melt the frost or small ice residues in the pressure sensor tube. However, for plug-in hybrid vehicles, when used in urban areas, the engine intervention time is short, and the heat generation is not enough to melt the frost on the pressure sensor tube. After that, the icing situation will intensify until the pressure sensor tube is completely frozen, resulting in the inability to receive the pressure difference signal and the car fault light is on. Utility Model Content
[0003] The utility model aims to provide a three-way catalytic converter pressure sensor tube, which can solve the problem that the pressure sensor tube of the three-way catalytic converter on the existing hybrid vehicle is easy to freeze in the cold northern region.
[0004] In order to solve the above problems, the technical solution adopted by the utility model is: this three-way catalytic converter pressure sensor tube includes a pressure sensor tube body, one end of the pressure sensor tube body is sleeved with a locking bolt, the end of the pressure sensor tube body sleeved with the locking bolt is set as a bent end, and a heating pipe is connected to the pressure sensor tube body along its length direction, and the two end ends of the heating pipe are connected to the coolant tank of the engine.
[0005] In the above technical solution, a more specific technical solution may also be: the shape of the heating pipe is similar to the pressure sensor tube body, and the straight pipe section thereof is connected to the pressure sensor tube body by welding.
[0006] Furthermore, the two ends of the heating pipe are arranged as bending parts, wherein the bending part at one end is connected to the cold end of the coolant tank through a hose, and the bending part at the other end is connected to the hot end of the coolant tank through a hose.
[0007] Furthermore, the shape of the heating pipe is similar to that of the pressure sensor tube body, the diameter of the middle section of the heating pipe is larger than the diameter of the pressure sensor tube body, the middle section of the heating pipe is sleeved outside the middle section of the pressure sensor tube body, and the two ends of the pressure sensor tube body extend from outlets provided at both ends of the middle section of the heating pipe.
[0008] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:
[0009] The utility model connects a heating pipe to the existing pressure sensor tube body along its length direction, and both ends of the heating pipe are connected to the coolant tank of the engine. The outer wall of the pressure sensor tube is heated by the coolant with heat flowing in the heating pipe, so that frost or small ice residues in the pressure sensor tube can be melted, thereby avoiding the problem that the pressure sensor tube is easy to freeze in cold northern regions, resulting in the inability to receive the pressure difference signal and the lighting of the car fault light. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a structural schematic diagram of an existing three-way catalytic converter pressure sensor tube.
[0011] Figure 2 A schematic structural diagram of Embodiment 1 of the present invention.
[0012] Figure 3 It is an installation diagram of embodiment 1 of the utility model.
[0013] Figure 4 It is a structural schematic diagram of embodiment 2 of the present utility model.
[0014] Serial number description:
[0015] Pressure sensor tube body 1, locking bolt 2, heating pipe 4, coolant tank 5, hose 6, clamp 7. DETAILED DESCRIPTION
[0016] The utility model is further described in detail below in conjunction with the accompanying drawings:
[0017] like Figure 2-3The embodiment 1 shown in the figure comprises a pressure sensor tube body 1, one end of which is sleeved with a locking bolt 2, the end of the pressure sensor tube body 1 sleeved with the locking bolt 2 is set as a bending portion, a heating pipe 4 is connected to the pressure sensor tube body 2 along its length direction, and both ends of the heating pipe are connected to the engine coolant tank 5, the shape of the heating pipe 4 is similar to the pressure sensor tube body 1, the middle straight pipe section is connected to the pressure sensor tube body 1 by welding, the weld 5 is on both sides of the middle straight pipe section, and the two ends of the heating pipe 4 are set The bending part is arranged as a bending part, wherein the bending part at one end is connected to the cold end of the coolant tank through the hose 6, and the bending part at the other end is connected to the hot end of the coolant tank through the hose 6. In order to ensure the tightness and stability of the connection between the hose and the bending part, a clamp 7 is placed on the end where the hose and the bending part of the heating pipe are connected. The installation method is as follows: the bending end of the pressure sensor tube body with the locking bolt is installed on the catalyst connection bolt, and the sensor nut 3 is tightened with a torque wrench, and at the same time, the two ends of the heating pipe are respectively connected and locked with the cold end and the hot end of the engine coolant tank through the hose. When the plug-in hybrid vehicle is in a cold northern region and is driving in the city, when the heat generated by the engine is not enough to melt the frost on the pressure sensor tube body, the warm cooling water circulating in the heating pipe welded in parallel with the pressure sensor tube body can melt the frost on the pressure sensor tube body, thereby achieving the purpose of defrosting, and avoiding the situation where the pressure difference signal cannot be received due to the freezing of the pipeline, the vehicle fault light is on, and the vehicle cannot drive normally.
[0018] like Figure 4 In the embodiment 2 shown, the shape of the heating pipe 4 is similar to that of the pressure sensor tube body 1, the diameter of the middle section of the heating pipe 4 is larger than the diameter of the pressure sensor tube body 1, the middle section of the heating pipe 4 is sleeved outside the middle section of the pressure sensor tube body 1, and the two ends of the pressure sensor tube body 1 extend from the outlets provided at both ends of the middle section of the heating pipe. The two ends of the heating pipe are set as bending parts, and one end of the pressure sensor tube body is sleeved with a locking bolt 2, and its connection method is the same as that of embodiment 1.
Claims
1. A three-way catalytic converter pressure sensor tube, comprising a pressure sensor tube body, one end of the pressure sensor tube body is sleeved with a locking bolt, and the end of the pressure sensor tube body sleeved with the locking bolt is set as a bent end, characterized in that: A heating pipe is connected to the pressure sensor tube body along its length direction, and both ends of the heating pipe are connected to the coolant tank of the engine.
2. The three-way catalytic converter pressure sensor tube according to claim 1, characterized in that: The shape of the heating pipe is similar to that of the pressure sensor pipe body, and a straight pipe section thereof is connected to the pressure sensor pipe body by welding.
3. The three-way catalytic converter pressure sensor tube according to claim 1 or 2, characterized in that: The two ends of the heating pipe are arranged as bending parts, wherein the bending part at one end is connected to the cold end of the coolant tank through a hose, and the bending part at the other end is connected to the hot end of the coolant tank through a hose.
4. The three-way catalytic converter pressure sensor tube according to claim 1, characterized in that: The shape of the heating pipe is similar to that of the pressure sensor tube body. The diameter of the middle section of the heating pipe is larger than the diameter of the pressure sensor tube body. The middle section of the heating pipe is sleeved outside the middle section of the pressure sensor tube body. The two ends of the pressure sensor tube body extend from outlets provided at both ends of the middle section of the heating pipe.
5. The three-way catalytic converter pressure sensor tube according to claim 4, characterized in that: The two ends of the heating pipe are arranged as bending parts, wherein the bending part at one end is connected to the cold end of the coolant tank through a hose, and the bending part at the other end is connected to the hot end of the coolant tank through a hose.