Condensate water measuring device of engine
By setting a transparent measuring tube in the engine intake pipe and using the Bernoulli equation principle to indirectly measure the condensate level, the problem of being unable to directly observe the condensate in the existing technology is solved, and low-cost, fast and safe condensate measurement is achieved.
Patent Information
- Application Number
- CN202422487342.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-10-15
AI Technical Summary
Existing technology cannot directly observe the amount of condensed water in the engine intake pipe. Traditional methods have long cycles, high costs, affect flow and heat transfer, and pose a risk of air leakage.
A transparent measuring tube is set in the engine intake pipe and connected to the intake pipe through a connecting hole. The condensation water level is indirectly measured using the principle of Bernoulli equation. The measuring tube is detachable without changing the shape and material of the intake pipe.
It achieves low-cost and fast condensate measurement, reduces the impact on flow and heat transfer, reduces the risk of air leakage, and improves maintenance efficiency.
Smart Images
Figure CN223317942U_ABST
Abstract
Description
Background Art
[0001] The utility model relates to the technical field of engines, in particular to a condensed water measuring device for an engine. Technical Field
[0002] In high humidity environments, condensed water is easily generated in the intake system of engines (especially those with turbocharged intercoolers and EGR systems). Under the action of gravity, condensed water gathers at the lowest point of the intake pipe, forming a puddle. The main sources of condensed water are as follows: (1) Wet air in high humidity environments, after being turbocharged and intercooled, condenses water after the intercooler; (2) The EGR pipe transports combustion exhaust gas, which contains a high amount of water vapor. The exhaust gas and the air after intercooling are mixed in the mixer, and the air is cooled to condense water; (3) The mixed gas of air and exhaust gas is cooled by the walls of the pipe and mixer, and condensed water is precipitated near the wall.
[0003] During engine operation, puddles of water are blown into the cylinders by the airflow. Because the condensed water is unevenly distributed among the cylinders, it can cause misfires in the cylinders with the most condensed water. Therefore, it is necessary to understand the amount of condensed water in the intake pipe. However, the engine intake pipe is opaque and cannot be directly observed. To detect the amount of condensed water in the intake pipe, a transparent glass pipe test is currently used for observation. However, this method has the following disadvantages:
[0004] 1. The cycle is long, taking more than half a year;
[0005] 2. High cost, one piece costs 30,000 to 35,000 yuan;
[0006] 3. Changing the material affects the flow (surface roughness and bonding may cause shape changes) and heat transfer (different thermal conductivity)
[0007] 4. There are reliability risks such as air leakage. Utility Model Content
[0008] In order to solve the above problems, the utility model provides an engine condensate water measuring device, which can measure the water level of condensate water without changing the shape and material of the intake pipe, and has low cost.
[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0010] A condensate measuring device for an engine includes an intake pipe and a measuring tube, the intake pipe including an air line, an EGR line, a mixer, an intake pipe, and an intake manifold connected in sequence, a first connecting hole being provided through the bottom of the intake pipe, a first connecting tube being provided through the first connecting hole, a second connecting hole being provided through the side of the intake pipe, a second connecting tube being provided through the second connecting hole, the measuring tube being made of a transparent material, and both ends of the measuring tube being conductively connected to the first connecting tube and the second connecting tube, respectively.
[0011] Furthermore, the measuring tube is provided with scale lines, and the measuring tube is arranged vertically.
[0012] Furthermore, the first connecting pipe and the second connecting pipe are both provided with an on-off valve.
[0013] Furthermore, sealing rings are fixedly provided on the outer walls of both ends of the measuring tube, and connecting pieces are provided at both ends of the measuring tube. One end of the connecting piece is slidably sleeved on the outer wall of the measuring tube and can abut against the sealing ring, and the other end is threadedly sleeved on the outside of the corresponding first connecting tube or the second connecting tube, so that the two sides of the sealing ring abut against the connecting piece and the corresponding first connecting tube or the second connecting tube.
[0014] Furthermore, the first connecting pipe is threadedly connected to the first communicating hole so that the first connecting pipe is communicated with the air intake pipe; the second connecting pipe is threadedly connected to the second communicating hole so that the second connecting pipe is communicated with the air intake pipe.
[0015] Furthermore, the first communicating hole is located on the lowest cross section of the air intake pipe.
[0016] The beneficial effects of the utility model are:
[0017] 1. The air and gas from the EGR line mix in the mixer to form a mixed gas. The condensed water generated by condensation inside the mixed gas and near the wall gathers at the lowest point of the intake pipe under the action of gravity, forming a puddle. The intake pipe is connected in series with the first connecting pipe, the second connecting pipe, and the measuring pipe. According to the principle of Bernoulli's equation, the water level in the measuring pipe is at the same height as the lowest point of the intake pipe. Therefore, the water level in the intake pipe can be indirectly measured by the liquid level height of the measuring pipe. The utility model does not change the shape and material of the intake pipe. It only needs to open the first connecting hole and the second connecting hole in the intake pipe. It has little impact on flow and heat transfer and reduces the risk of air leakage. At the same time, the modification cycle is short and the modification cost is low.
[0018] 2. When measurement is not required, the influence of flow and heat transfer can be further avoided by closing the switch valve; since the first connecting pipe and the second connecting pipe are both threadedly connected to the air intake pipe, the measuring pipe is in a vertical state when the first connecting pipe and the second connecting pipe are tightened. When the measuring pipe is damaged, after closing the two switch valves, when the connecting piece of the measuring pipe close to the second connecting pipe is loosened, the second connecting pipe is lifted, thereby separating the measuring pipe from the second connecting pipe, and then loosening the connecting piece of the measuring pipe close to the first connecting pipe, the measuring pipe can be removed from the first connecting pipe and the second connecting pipe to be replaced with a new measuring pipe, without the need to disassemble the first connecting pipe and the second connecting pipe, thereby improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of an engine condensate water measuring device according to a preferred embodiment of the present invention.
[0020] Figure 2 It is a schematic diagram of the structure of a measuring tube of an engine condensate water measuring device according to a preferred embodiment of the present invention.
[0021] In the figure, 11-air pipe, 12-EGR pipe, 13-mixer, 14-intake pipe, 15-intake main pipe, 2-measuring tube, 21-scale line, 3-first connecting hole, 31-first connecting pipe, 4-second connecting hole, 41-second connecting pipe, 5-switch valve, 6-sealing ring, 61-connecting part. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0023] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.
[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0025] Please also see Figure 1 and Figure 2 A condensate measuring device for an engine according to a preferred embodiment of the present invention includes an intake pipe and a measuring pipe 2. The intake pipe includes an air pipe 11, an EGR pipe 12, a mixer 13, an intake pipe 14, and an intake manifold 15 which are connected in sequence.
[0026] A first connecting hole 3 is provided through the bottom of the air intake pipe 14, and a first connecting pipe 31 is provided in the first connecting hole 3. A second connecting hole 4 is provided through the side of the air intake pipe 14, and a second connecting pipe 41 is provided in the second connecting hole 3. The measuring tube 2 is made of transparent material, and the two ends of the measuring tube 2 are respectively conductively connected to the first connecting pipe 31 and the second connecting pipe 41.
[0027] like Figure 1 As shown, the first connecting hole 3 is located at the lowest cross section of the intake pipe 14. Since the pressure at the top of the intake pipe 14 is relatively low, the second connecting hole 3 is optimally positioned at the side area of the intake pipe 14, so that the second connecting hole 3 is located at a high position in the intake pipe 14.
[0028] In this embodiment, air and gas from the EGR line 12 mix within the mixer 13 to form a mixed gas. Condensed water, which condenses within the mixed gas and near the walls, gathers under the action of gravity at the lowest point of the intake pipe 14, forming a puddle. The intake pipe 14 is connected in series with the first connecting pipe 31, the second connecting pipe 41, and the measuring pipe 2. According to the Bernoulli equation, the water level in the measuring pipe 2 and the lowest point of the intake pipe 14 are at the same height. Therefore, the water level in the intake pipe 14 can be indirectly measured by the liquid level in the measuring pipe 2.
[0029] This embodiment does not change the shape and material of the intake pipe. It only needs to open the first connecting hole 3 and the second connecting hole 4 in the intake pipe 14, which has little impact on the flow and heat transfer and low risk of air leakage. At the same time, the modification cycle is short and the modification cost is low.
[0030] like Figure 1 As shown, the measuring tube 2 is provided with scale lines 21 and is arranged vertically. By observing the scale line 21 reading corresponding to the position of the condensed water in the measuring tube 2, the liquid level in the intake pipe 14 can be quickly obtained. The vertical position of the measuring tube 2 can improve the accuracy of the liquid level reading.
[0031] like Figure 1 As shown, both the first connecting pipe 31 and the second connecting pipe 41 are provided with a switch valve 5. When measurement is not required, closing the switch valve 5 can further avoid the influence of flow and heat transfer.
[0032] like Figure 2 As shown, sealing rings 6 are fixedly provided on the outer walls of both ends of the measuring tube 2, and connecting pieces 61 are provided at both ends of the measuring tube 2. One end of the connecting piece 61 is slidably sleeved on the outer wall of the measuring tube 2 and can abut against the sealing ring 6, and the other end is threadedly sleeved on the outside of the corresponding first connecting tube 31 or the second connecting tube 41, so that the two sides of the sealing ring 6 abut against the connecting piece 61 and the corresponding first connecting tube 31 or the second connecting tube 41.
[0033] The connecting piece 61 of this embodiment is a tubular structure with one end open, and a limiting plate that slides with the measuring tube 2 is provided at one end of the connecting piece 61. By tightening the connecting piece 61, the connecting piece 61 is threadedly connected to the corresponding first connecting tube 31 or the second connecting tube 41. At the same time, the limiting plate is pressed against the sealing ring 6, so that the two sides of the sealing ring 6 are respectively clamped by the connecting piece 61 and the corresponding first connecting tube 31 or the second connecting tube 41, thereby realizing the sealing of the measuring tube 2 and the first connecting tube 31 and the second connecting tube 41.
[0034] In this embodiment, the first connecting pipe 31 is threadedly connected to the first communicating hole 3, thereby communicating with the intake pipe 14. The second connecting pipe 41 is threadedly connected to the second communicating hole 4, thereby communicating with the intake pipe 14. In this embodiment, the connections between the first connecting pipe 31 and the second connecting pipe 41 and the intake pipe 14 are both provided with seals to ensure the sealing of the intake pipe.
[0035] When the first connecting tube 31 and the second connecting tube 41 are tightened, the measuring tube 2 is in a vertical state. When the measuring tube 2 is damaged, after closing the two switch valves 5, when the connecting piece 61 of the measuring tube 2 close to the second connecting tube 41 is loosened, the second connecting tube 41 is lifted, thereby realizing the separation of the measuring tube 2 and the second connecting tube 41. Then, the connecting piece 61 of the measuring tube 2 close to the first connecting tube 31 is loosened again, and the measuring tube 2 can be disassembled from the first connecting tube 31 and the second connecting tube 41 to replace a new measuring tube 2 without disassembling the first connecting tube 31 and the second connecting tube 41, thereby improving the maintenance efficiency.
[0036] The installation method of the engine condensate measuring device of this embodiment is as follows:
[0037] Screw the first connecting tube 31 into the first communicating hole 3 and tighten it. Screw the second connecting tube 41 into the second communicating hole 4, leaving a certain margin for the second connecting tube 41. First, thread a connector 61 onto the first connecting tube 31, then thread another connector 61 onto the second connecting tube 41. As the connector 61 is tightened, the second connecting tube 41 rotates and tightens accordingly, placing the measuring tube 2 in a vertical position. This completes the installation of the first connecting tube 31, the second connecting tube 41, and the measuring tube 2.
[0038] The measuring principle of the engine condensate measuring device of this embodiment is as follows:
[0039] The air and the gas from the EGR line 12 are mixed in the mixer 13 to form a mixed gas. The condensed water generated by the condensation inside the mixed gas and near the wall gathers at the lowest point of the intake pipe 14 under the action of gravity, forming a puddle. According to the principle of Bernoulli's equation, the water level of the measuring tube 2 and the lowest point of the intake pipe 14 are at the same height. The water level of the intake pipe 14 can be indirectly measured by the liquid level height of the measuring tube 2.
Claims
1. A condensed water measuring device for an engine, characterized in that: The invention comprises an intake pipe and a measuring pipe (2), wherein the intake pipe comprises an air pipe (11), an EGR pipe (12), a mixer (13), an intake pipe (14), and an intake manifold (15) connected in sequence. A first connecting hole (3) is provided through the bottom of the intake pipe (14), and a first connecting pipe (31) is provided in the first connecting hole (3). A second connecting hole (4) is provided through the side of the intake pipe (14), and a second connecting pipe (41) is provided in the second connecting hole (4). The measuring pipe (2) is made of a transparent material, and both ends of the measuring pipe (2) are respectively connected to the first connecting pipe (31) and the second connecting pipe (41).
2. The condensate water measuring device for an engine according to claim 1, characterized in that: The measuring tube (2) is provided with a scale line (21), and the measuring tube (2) is arranged vertically.
3. The condensate water measuring device for an engine according to claim 1, characterized in that: The first connecting pipe (31) and the second connecting pipe (41) are both provided with an on-off valve (5).
4. The condensate water measuring device for an engine according to claim 3, characterized in that: Sealing rings (6) are fixedly provided on the outer walls of both ends of the measuring tube (2), and connecting pieces (61) are provided on both ends of the measuring tube (2). One end of the connecting piece (61) is slidably sleeved on the outer wall of the measuring tube (2) and can abut against the sealing ring (6), and the other end is threadedly sleeved on the outside of the corresponding first connecting tube (31) or the second connecting tube (41), so that the two sides of the sealing ring (6) abut against the connecting piece (61) and the corresponding first connecting tube (31) or the second connecting tube (41).
5. The condensate water measuring device for an engine according to claim 4, characterized in that: The first connecting pipe (31) is threadedly connected to the first communicating hole (3) so that the first connecting pipe (31) is in communication with the air intake pipe (14); the second connecting pipe (41) is threadedly connected to the second communicating hole (4) so that the second connecting pipe (41) is in communication with the air intake pipe (14).
6. The condensate water measuring device for an engine according to claim 1, characterized in that: The first communicating hole (3) is located on the lowest cross section of the air intake pipe (14).