A crankcase ventilation pipe joint for barometric pressure detection

Abstract

The utility model discloses a kind of crankcase ventilation pipe joints for air pressure detection, it is related to the technical field of automobile engine accessories, including fixed block one, fixed block two, clamping column, sliding sheet and air pressure detection mechanism;Fixed block one is equipped with sealing block and limit block, fixed block two is equipped with clamping groove, fixed slot and sliding slot, the limit block of fixed block one is in the clamping groove of fixed block two Sliding clamping, clamping column is inserted into fixed slot and is locked by sliding sheet, air pressure detection mechanism includes detection box, air cylinder, sliding disc one, detection sheet, sliding disc two and wire, gas is moved by detection box into air cylinder and pushes sliding disc one, when air pressure is too high, detection sheet is jacked up, when air pressure is too low, sliding disc two is pressed, wire transmits signal.The utility model solves the problem that installation is complex, sealing is poor and cannot monitor pressure, has the beneficial effect of installation fast, sealing reliable, can real-time monitoring high and low air pressure to protect crankshaft box.

Description

Technical Field

[0001] This utility model relates to the field of automotive engine parts technology, and in particular to a crankcase ventilation pipe connector for air pressure detection. Background Technology

[0002] During the operation of an internal combustion engine, some unburned gases can seep into the crankcase through the gaps in the piston rings, forming what is known as blow-by. In order to maintain the pressure balance in the crankcase and prevent excessive pressure from causing oil leakage or damage to the oil seals, engines are generally equipped with a crankcase forced ventilation system. The blow-by gases are guided to the intake system for re-combustion through the ventilation pipes. As a key component connecting the crankcase and the ventilation pipes, the ease of installation and the sealing of the connection are of paramount importance.

[0003] In existing technologies, ventilation pipe joints typically use traditional clamp fastening or threaded connections. These installation methods are inconvenient and time-consuming to operate in the compact engine compartment. More importantly, due to the continuous vibration and high temperature environment generated during engine operation, these connections may loosen or age, leading to a decrease in sealing performance. Once the seal fails, it will not only cause exhaust gas leakage and environmental pollution, but also cause inaccurate pressure data in the crankcase, affecting the engine management system's judgment of operating conditions.

[0004] Meanwhile, the pressure inside the crankcase is not constant; abnormal increases or decreases are signs of potential engine malfunctions. However, many existing ventilation pipe joints only have connection and sealing functions and do not have pressure detection capabilities. To monitor the pressure, an additional independent pressure sensor is usually required. This not only increases the complexity, cost, and potential failure points of the system, but also the separation of the sensor installation location from the joint location can affect the real-time performance and accuracy of the detection due to pipeline pressure drop.

[0005] Therefore, this utility model proposes a crankcase ventilation pipe connector for air pressure detection to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems of complex installation structure, inconvenient assembly, poor sealing, and single function of existing crankcase ventilation pipe joints, which cannot separately monitor high and low air pressure in the crankcase, this utility model aims to provide a crankcase ventilation pipe joint with improved structure that can effectively solve the above problems for air pressure detection.

[0007] This utility model provides a crankcase ventilation pipe connector for air pressure detection, including: a second fixing block for connecting to the crankcase, a first fixing block for connecting to the air pipe, and an air pressure detection mechanism; as well as a locking pin and a sliding plate.

[0008] The second fixing block is provided with a slot, a fixing groove and a sliding groove, the first fixing block is provided with a sealing block and a limiting block, and the air pressure detection mechanism includes a detection box, an air cylinder, a sliding plate, a detection plate, a second sliding plate and wires.

[0009] Furthermore, the first fixing block, the second fixing block, the locking pin, and the sliding plate are combined in the following way: the sealing block and the limiting block of the first fixing block can slide on the inner wall of the slot of the second fixing block; the locking pin can be inserted into the fixing slot of the second fixing block; and the sliding plate can slide in the sliding groove of the second fixing block to cover the fixing groove, thereby forming a quick-installation locking structure. At the same time, the first sliding plate is set inside the air cylinder, the detection plate and the second sliding plate are respectively set above and below the movement path of the first sliding plate, and the detection box is provided with an air outlet to allow gas to be transferred from the detection box to the air cylinder, thereby forming a high and low pressure segmented monitoring structure.

[0010] Preferably, the limiting block can be locked into the deepest part of the slot of the second fixing block by rotating the first fixing block.

[0011] Preferably, when the locking pin is inserted into the inner wall of the fixing groove of the second fixing block, the second fixing block is connected to the limiting block and the sliding groove.

[0012] Preferably, the detection plate is positioned above the first sliding plate, and the first sliding plate moves upward to push the detection plate when the air pressure is too high.

[0013] Preferably, the second slide is located below the first slide, and the first slide moves downward to press down the second slide when the air pressure is too low.

[0014] Preferably, the wire is connected to the detection plate to transmit an excessive air pressure signal to the vehicle's infotainment system.

[0015] Preferably, the wire is connected to the second slide plate to transmit a low air pressure signal to the vehicle's infotainment system.

[0016] Preferably, both the sealing block and the limiting block are disposed on the first fixing block.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model solves the problems of complex installation, loose connection, and poor sealing of crankcase ventilation pipe joints in the prior art, which lead to deviation of air pressure detection data. It achieves the technical effect of fast installation, tight connection and good sealing. By setting a fixing block one and a fixing block two, and making the sealing block and limiting block on the fixing block one slide and rotate and lock in place in the slot of the fixing block two, and then inserting the locking post into the fixing slot and locking it by sliding the sliding piece, this utility model solves the problems of complex installation, loose connection and poor sealing of crankcase ventilation pipe joints in the prior art.

[0019] 2. This utility model solves the problem of existing technologies lacking real-time high and low pressure monitoring of crankcase air pressure, which makes it impossible to detect abnormal air pressure in time and may cause crankcase damage. It achieves the technical effect of real-time, high and low pressure segmented monitoring and alarm of air pressure, effectively protecting the safety of the crankcase. Attached Figure Description

[0020] Figure 1 This is a perspective view of the front side of the crankcase of a crankcase ventilation pipe joint for air pressure detection proposed in this utility model.

[0021] Figure 2 This is a partial structural exploded view of the fixing block 2 of the crankcase ventilation pipe joint for air pressure detection proposed in this utility model;

[0022] Figure 3 This is a partial structural diagram of a fixing block for a crankcase ventilation pipe joint used for air pressure detection, as proposed in this utility model.

[0023] Figure 4 This is a partial structural diagram of a crankcase ventilation pipe joint testing box for air pressure detection proposed in this utility model.

[0024] Legend:

[0025] 1. Crankshaft housing; 2. Air pressure detection mechanism; 201. Detection plate; 202. Slide plate one; 203. Air cylinder; 204. Wire; 205. Air outlet; 206. Air pipe; 207. Detection box; 208. Slide plate two; 3. Clamping post; 4. Slide groove; 5. Fixing block one; 6. Sealing block; 7. Clamping groove; 8. Fixing block two; 9. Fixing groove; 10. Limiting block; 11. Sliding plate. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] Example:

[0028] Please refer to Figures 1 to 4A crankcase ventilation pipe connector for air pressure detection includes a second fixing block 8, a first fixing block 5, and an air pressure detection mechanism 2. The second fixing block 8 is used to connect with the crankcase 1 and has a slot 7, a fixing groove 9, and a sliding groove 4. The first fixing block 5 is used to connect with the air pipe 206 and has a sealing block 6 and a limiting block 10 fixedly connected to it. Both the sealing block 6 and the limiting block 10 can slide and fit into the inner wall of the slot 7 of the second fixing block 8. By rotating the first fixing block 5, the limiting block 10 can be engaged at the deepest part of the slot 7. The crankcase ventilation pipe connector for detection also includes a retaining post 3 and a sliding plate 11. The retaining post 3 can be inserted into the inner wall of the fixing groove 9 of the fixing block 2 8. The retaining post 3 is connected to the limiting block 10 and the sliding groove 4 of the fixing block 2 8. The sliding plate 11 is slidably set in the sliding groove 4 of the fixing block 2 8. After the sliding plate 11 slides, it can cover the fixing groove 9. The air pressure detection mechanism 2 is connected to the air pipe 206 to monitor the gas pressure. The air pressure detection mechanism 2 includes a detection box 207, an air cylinder 203, a sliding plate 1 202, a detection plate 201, a sliding plate 208, an electric wire 204, and an air outlet 205.

[0029] Please refer to Figure 4 The pressure testing mechanism 2 has a testing box 207 connected to an air pipe 206, and the testing box 207 is provided with an air outlet 205. Gas enters the air cylinder 203 from the testing box 207 through the air outlet 205. A sliding plate 202 is slidably mounted inside the air cylinder 203. A testing plate 201 is fixedly mounted above the movement path of the sliding plate 202, and a second sliding plate 208 is fixedly mounted below the movement path of the sliding plate 202. When the gas pressure inside the air cylinder 203 is too high and the sliding plate 202 moves upward, the sliding plate 202 will push against the pressure. When the gas pressure in the air cylinder 203 is too low, causing the sliding plate 202 to move downward, the sliding plate 202 will press the sliding plate 208. The wire 204 is electrically connected to the detection plate 201 and the sliding plate 208 respectively, so as to transmit a high air pressure signal to the vehicle machine when the detection plate 201 is pushed up, and transmit a low air pressure signal to the vehicle machine when the sliding plate 208 is pressed. This structure, which uses a single moving part to trigger different detection points under different pressures, realizes separate monitoring of high and low air pressures and ensures the reliability of the detection function.

[0030] As a preferred installation structure, please refer to Figure 2 and Figure 3The sealing block 6 is an annular elastic seal to provide a reliable gas seal. The limiting block 10 is a radial protrusion integrally formed or fixedly connected to the outer wall of the fixing block 5. During installation, the fixing block 5 is inserted into the cavity of the fixing block 8, so that the sealing block 6 and the limiting block 10 enter the annular groove 7 opened in the inner wall of the fixing block 8. The groove 7 has areas of varying depths along the circumference to form a locking position. By manually rotating the fixing block 5, the limiting block 10 moves along the trajectory of the groove 7 to the deepest part of the groove 7 to achieve circumferential locking. Then, the locking post 3, which extends axially from the fixing block 5, is fully inserted into the fixing groove 9 opened on the end face of the fixing block 8 to achieve axial limiting and locking. The insertion of the locking post 3 also connects the fixing block 8 with the limiting block 10 and the sliding groove 4. Finally, the sliding piece 11 slides radially in the sliding groove 4. The end of the sliding piece 11 covers the opening of the fixing groove 9 to prevent the locking post 3 from accidentally coming out, thereby completing a quick and stable connection.

[0031] As a preferred detection structure, please refer to Figure 4 The air pressure detection mechanism 2 has a sliding plate 202, which is a piston-shaped component that can slide freely along the axis in the inner cavity of the air cylinder 203. The detection piece 201 is a high-voltage signal contact of a metal spring or micro switch, which is fixedly set at the end point of movement above the sliding plate 202. The sliding plate 208 is another low-voltage signal contact, which is fixedly set at the end point of movement below the sliding plate 202. When the air pressure is too high, the sliding plate 202 is pushed upward by the gas in the air cylinder 203 until its upper surface touches the detection piece 201. When the air pressure is too low, the sliding plate 202 moves downward due to insufficient pressure or its own gravity until its lower surface presses the sliding plate 208. The wire 204 is a multi-core wire, and the cores of the wire 204 are electrically connected to the detection piece 201 and the sliding plate 208 respectively, so that the high-voltage signal and the low-voltage signal are transmitted to the vehicle machine through different circuits.

[0032] Working principle:

[0033] Push the fixing block 5 to the left, which causes the sealing block 6 to slide on the inner wall of the slot 7, and then causes the limiting block 10 to slide on the inner wall of the slot 7. Then rotate the fixing block 5 so that the limiting block 10 is locked in the deepest part of the slot 7. Then insert the locking post 3 into the inner wall of the fixing groove 9, so that the fixing block 8, the limiting block 10 and the sliding groove 4 are connected together. Then slide the sliding piece 11 in the sliding groove 4 so that the sliding piece 11 covers the fixing groove 9, completing the assembly of the crankshaft box 1 and the air pipe 206. This achieves rapid installation of the device and tight connection, avoiding the deviation of air pressure detection data due to poor sealing.

[0034] When gas is transmitted from the gas pipe 206 to the detection box 207, the air pressure detection mechanism 2 is required. Then, the gas is transmitted from the detection box 207 to the air cylinder 203 through the air outlet 205. The gas pushes the air cylinder 203 upward and downward. When the air pressure is too high, the first slide plate 202 pushes the detection plate 201 upward, and the wire 204 transmits the high air pressure to the vehicle machine. When the air pressure is too low, the first slide plate 202 pushes the second slide plate 208 downward, and the wire 204 transmits the low air pressure to the vehicle machine. This realizes real-time monitoring of air pressure and avoids damage to the crankshaft box 1 due to excessively low or high air pressure.

Claims

1. A crankcase ventilation pipe connector for air pressure detection, comprising: Fixing block 2 (8) for connection with crankcase (1); Fixing block 1 (5) for connection with trachea (206); Air pressure testing agency (2); Its features are, The second fixing block (8) is provided with a slot (7), a fixing slot (9) and a sliding slot (4); The first fixing block (5) is provided with a sealing block (6) and a limiting block (10) that can slide on the inner wall of the slot (7) of the second fixing block (8); The connector also includes a locking pin (3), which can be inserted into the fixing groove (9) of the fixing block two (8); The connector also includes a sliding piece (11), which can slide within the groove (4) of the fixing block (8) to cover the fixing groove (9); The air pressure detection mechanism (2) includes a detection box (207), an air cylinder (203), a sliding plate (202) set in the air cylinder (203), a detection plate (201) for detecting high pressure, a sliding plate (208) for detecting low pressure, and an electric wire (204). The testing box (207) is provided with an air outlet (205), through which gas is transferred from the testing box (207) to the air cylinder (203).

2. A crankcase ventilation pipe connector for air pressure detection according to claim 1, characterized in that, The limiting block (10) can be locked in the deepest part of the slot (7) of the fixing block (8) by rotating the fixing block one (5).

3. A crankcase ventilation pipe connector for air pressure detection according to claim 1, characterized in that, When the locking pin (3) is inserted into the inner wall of the fixing groove (9) of the fixing block two (8), the fixing block two (8) is connected to the limiting block (10) and the sliding groove (4).

4. A crankcase ventilation pipe connector for air pressure detection according to claim 1, characterized in that, The detection plate (201) is positioned above the slide plate (202), and the slide plate (202) moves upward to push the detection plate (201) when the air pressure is too high.

5. A crankcase ventilation pipe connector for air pressure detection according to claim 1, characterized in that, The second slide (208) is located below the first slide (202). When the air pressure is too low, the first slide (202) moves downward to press the second slide (208).

6. A crankcase ventilation pipe connector for air pressure detection according to claim 4, characterized in that, The wire (204) is connected to the detection plate (201) to transmit an overpressure signal to the vehicle's infotainment system.

7. A crankcase ventilation pipe connector for air pressure detection according to claim 5, characterized in that, The wire (204) is connected to the slide plate two (208) to transmit a low air pressure signal to the vehicle system.

8. A crankcase ventilation pipe connector for air pressure detection according to claim 1, characterized in that, The sealing block (6) and the limiting block (10) are both mounted on the fixing block (5).

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