Crankcase ventilation monitoring pipe

Abstract

The utility model provides a crankcase ventilation monitoring pipe, and belongs to the technical field of automobile accessories. The device structurally comprises a forming rubber pipe, a protective sleeve, a locking sleeve, a heating monitoring connector A, a monitoring connector B, a connecting wire harness and a monitoring resistance module, the protective sleeve is arranged outside the forming rubber pipe, one end of the forming rubber pipe is connected with the heating monitoring connector A through the locking sleeve, and the other end of the forming rubber pipe is connected with the monitoring connector B through the locking sleeve; a connecting wire harness is connected between the monitoring connector B and the heating monitoring connector A. A monitoring resistor module is arranged on the connecting wire harness. The device has a plurality of diagnosis functions, and can output different resistances for diagnosis when the diagnosis joint A is disconnected, the diagnosis joint B is disconnected, the two joints are simultaneously disconnected, and the wiring harness is short-circuited and open-circuited. The heater can ensure that the joint of the ventilation pipeline and the air inlet pipe is not iced. The diagnosis function is more perfect, the operation is stable and reliable, and the technical advantages are prominent.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to a crankcase ventilation monitoring tube. Background Technology

[0002] The crankcase is a crucial component of the engine, located at the bottom of the cylinder block, primarily used to mount the crankshaft. GB18352.6-2016 "Emission Limits and Measurement Methods for Pollutants from Light-Duty Diesel Vehicles (China VI)" and GB17691-2018 "Emission Limits and Measurement Methods for Pollutants from Heavy-Duty Diesel Vehicles (China VI)" clearly define that the crankcase ventilation system must ensure the integrity of its piping. If a vehicle uses a ventilation system, the manufacturer must monitor the system to ensure its integrity. Furthermore, it is explicitly stipulated that piping used for ventilation of different areas of the engine is also part of the ventilation system and should be subject to fault diagnosis as required. Non-removable structures are exempt; for parts that cannot be exempted, ventilation system fault diagnosis is mandatory to ensure the integrity of the ventilation system and to promptly monitor its condition.

[0003] In existing technologies, conventional diagnostic solutions mainly include pressure sensor solutions and quick-connect coupling solutions. The pressure sensor solution uses a micro-pressure sensor to detect pressure differences within the pipeline to determine if the pipeline has detached. In this solution, because the internal pressure is low (between -5KPa and 0KPa), strict diagnostic strategies can easily lead to false alarms, while broad settings render the diagnostic ineffective. The quick-connect coupling solution incorporates an energized switch within the coupling. Insertion of the male connector mechanically pushes an internal push rod, triggering the energized switch to activate the detection circuit, resulting in different voltage values ​​to determine if the pipeline connector has detached. This method is more direct and reliable; the stability of the mechanical structure ensures that as long as the connector remains connected, the detection circuit will continue to conduct, and the output voltage will remain constant, eliminating the risk of false alarms. However, current conventional monitoring tubes based on quick-connect coupling solutions still require improvement, particularly in monitoring functionality and ease of connection. Summary of the Invention

[0004] The technical problem to be solved by this utility model is: how to design a crankcase ventilation monitoring tube with more complete monitoring functions and more convenient and reliable connection.

[0005] To achieve the above technical objectives, the present invention adopts the following technical solution:

[0006] A crankcase ventilation monitoring tube includes a molded rubber hose, a protective sleeve, a locking sleeve, a heating monitoring connector A, a monitoring connector B, a connecting wire harness, and a monitoring resistance module. The protective sleeve is located outside the molded rubber hose. One end of the molded rubber hose is connected to the heating monitoring connector A via the locking sleeve, and the other end of the molded rubber hose is connected to the monitoring connector B via the locking sleeve. A connecting wire harness is connected between the monitoring connector B and the heating monitoring connector A, and a monitoring resistance module is installed on the connecting wire harness.

[0007] Preferably, both heating monitoring connector A and monitoring connector B are provided with electrical connectors, and both ends of the connecting wire harness are connected to the electrical connectors.

[0008] Preferably, electrical connectors are provided on both sides of the monitoring resistor module, and the monitoring resistor module is connected to the connecting wire harness through the electrical connectors on both sides.

[0009] Preferably, the heating monitoring connector A has a housing on the outside, a heat dissipation pipe passes through the housing, a first built-in monitoring switch is provided between the housing and the heat dissipation pipe, a heating electrical plug is provided on the outside, and a built-in PTC heating element is provided inside the heating monitoring connector A.

[0010] Preferably, the monitoring connector B has a housing on the outside, and a second built-in monitoring switch is provided between the housing and the molding tube.

[0011] Preferably, the monitoring resistor module has a monitoring resistor module housing on the outside, a built-in monitoring resistor component inside the monitoring resistor module, and a monitoring function electrical plug-in on the outside of the monitoring resistor module.

[0012] This invention employs a switch-type quick-connect connector structure. When the male connector is inserted into the female connector, the switch-type diagnostic connector in the female connector changes from an open state to a closed state. Diagnostic method: In the closed state, if the ECU detects a specific voltage and detects other voltages, an alarm is triggered. This invention has multiple diagnostic functions; it can output different resistances for diagnosis when diagnostic connector A is open, diagnostic connector B is open, both connectors are open simultaneously, or the wiring harness is short-circuited or open-circuited. The heater ensures that icing does not occur at the connection between the ventilation duct and the intake pipe. This invention has more comprehensive diagnostic functions, stable and reliable operation, and outstanding technical advantages. Attached Figure Description

[0013] Figure 1 This is an overall drawing of the present invention;

[0014] Figure 2 This is the first partial view of the heating monitoring connector A in this utility model;

[0015] Figure 3 This is the second partial view of the heating monitoring connector A in this utility model;

[0016] Figure 4 This is the first partial view of the monitoring connector B in this utility model;

[0017] Figure 5 This is the second partial view of the monitoring connector B in this utility model;

[0018] Figure 6 This is a partial view of the monitoring resistor module in this utility model;

[0019] Figure 7 This is a schematic diagram of the electrical connections of this utility model;

[0020] Figure 8 This is the ECU output characteristic diagram of this utility model; in Figure 8 In the diagram, the ECU output characteristics are: Vout=5*Rpcv / (Recu+Rpcv); R1=1KQ±10%; R2=3KQ±10%; R3=5.1KQ±10%; Rpcv is the resistance of the entire diagnostic pipeline;

[0021] Figures 1-6 middle:

[0022] Detailed Implementation

[0023] The specific embodiments of this utility model will be described in detail below. To avoid excessive and unnecessary details, well-known structures or functions will not be described in detail in the following embodiments. The approximate language used in the following embodiments can be used for quantitative descriptions, indicating that a certain degree of variation in quantity is permissible without changing the basic function. Unless otherwise defined, the technical and scientific terms used in the following embodiments have the same meaning as commonly understood by those skilled in the art to which this utility model pertains.

[0024] Crankcase ventilation monitoring tube, such as Figures 1-6 As shown, it includes a molding hose 1, a protective sleeve 2, a locking sleeve 3, a heating monitoring connector A4, a monitoring connector B5, a connecting wire harness 7, and a monitoring resistance module 8. The protective sleeve 2 is disposed outside the molding hose 1. The heating monitoring connector A4 is connected to one end of the molding hose 1 through the locking sleeve 3, and the monitoring connector B5 is connected to the other end of the molding hose 1 through the locking sleeve 3. The connecting wire harness 7 is connected between the monitoring connector B5 and the heating monitoring connector A4, and the monitoring resistance module 8 is provided on the connecting wire harness 7.

[0025] Among them, both heating monitoring connector A4 and monitoring connector B5 are provided with electrical connector 6, and both ends of the connecting wire harness 7 are connected to the electrical connector 6.

[0026] Electrical connectors 6 are provided on both sides of the monitoring resistor module 8, and the monitoring resistor module 8 is connected to the connecting harness 7 through the electrical connectors 6 on both sides.

[0027] The heating monitoring connector A4 has a heating monitoring connector A housing 11 on the outside, a heat dissipation pipe 12 passes through the heating monitoring connector A housing 11, a first built-in monitoring switch 13 is provided between the heating monitoring connector A housing 11 and the heat dissipation pipe 12, a heating electrical plug 10 is provided on the outside of the heating monitoring connector A4, and a built-in PTC heating element 14 is provided inside the heating monitoring connector A4.

[0028] The monitoring connector B5 has a monitoring connector B housing 16 on the outside, and a second built-in monitoring switch 15 is provided between the monitoring connector B housing 16 and the molding tube 1.

[0029] The monitoring resistor module 8 has a monitoring resistor module housing 17 on the outside, a built-in monitoring resistor assembly 18 inside the monitoring resistor module 8, and a monitoring function electrical plug-in 9 on the outside of the monitoring resistor module 8.

[0030] The electrical connection structure of this embodiment is as follows: Figure 7 As shown, the ECU output characteristics are as follows: Figure 8 As shown.

[0031] This embodiment has multiple diagnostic functions. It can output different resistances to diagnose when connector A is disconnected, connector B is disconnected, both connectors are disconnected at the same time, and the wiring harness is short-circuited or open-circuited.

[0032] By default, the ECU outputs a specific voltage; when the ECU outputs 5V, 0V or other voltages, the pipeline connection is in an abnormal state and the ECU reports a fault.

[0033] ECU output characteristics:

[0034] Wiring harness short circuit: VOUT=0V; Pipe continuity: VOUT=5*R1 / (RECU+R1).

[0035] Pipeline disconnected:

[0036] When monitoring switch K1 is open: VOUT=5*(R1+R2) / (RECU+R1+R2), when monitoring switch K2 is open: VOUT=5*(R1+R3) / (RECU+R1+R3).

[0037] Both diagnostic components are disconnected: VOUT=5*(R1+R2+R3) / (RECU+R1+R2+R3), and the monitoring function electrical plug-in is disconnected: VOUT=5V.

[0038] The product assembly parameters are as follows:

[0039] 1. Applicable voltage: DC24V.

[0040] 2. Heating operating current: 0.5-1.5A (adjustable with temperature), starting current ≤4A.

[0041] 3. Applicable environment: -40℃ to 100℃.

[0042] 4. The heating electrical plug model is TE1-1703 498-1; waterproof rating: IP67; the matching electrical plug model is TE 1-1718643-1.

[0043] 5. The electrical plug-in model is TE 936462-2; waterproof rating: IP67; the matching electrical connector model is TE 2050046-1.

[0044] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the scope of this utility model application should be included within the protection scope of this utility model.

Claims

1. A crankcase ventilation monitoring tube, characterized in that... The device includes a molding hose (1), a protective sleeve (2), a locking sleeve (3), a heating monitoring connector A (4), a monitoring connector B (5), a connecting wire harness (7), and a monitoring resistance module (8). The protective sleeve (2) is located outside the molding hose (1). The heating monitoring connector A (4) is connected to one end of the molding hose (1) through the locking sleeve (3). The monitoring connector B (5) is connected to the other end of the molding hose (1) through the locking sleeve (3). The connecting wire harness (7) is connected between the monitoring connector B (5) and the heating monitoring connector A (4). The monitoring resistance module (8) is provided on the connecting wire harness (7).

2. The crankcase ventilation monitoring tube according to claim 1, characterized in that, Electrical connectors (6) are provided on both the heating monitoring connector A (4) and the monitoring connector B (5), and both ends of the connecting wire harness (7) are connected to the electrical connectors (6).

3. The crankcase ventilation monitoring tube according to claim 1, characterized in that, Electrical connectors (6) are provided on both sides of the monitoring resistor module (8), and the monitoring resistor module (8) is connected to the connecting harness (7) through the electrical connectors (6) on both sides.

4. The crankcase ventilation monitoring tube according to claim 1, characterized in that, The heating monitoring connector A (4) has a heating monitoring connector A housing (11) on the outside, a heat dissipation pipe (12) passes through the heating monitoring connector A housing (11), a first built-in monitoring switch (13) is provided between the heating monitoring connector A housing (11) and the heat dissipation pipe (12), a heating electrical plug (10) is provided on the outside of the heating monitoring connector A (4), and a built-in PTC heating element (14) is provided inside the heating monitoring connector A (4).

5. The crankcase ventilation monitoring tube according to claim 1, characterized in that, The monitoring connector B (5) has a monitoring connector B housing (16) on the outside, and a second built-in monitoring switch (15) is provided between the monitoring connector B housing (16) and the molding tube (1).

6. The crankcase ventilation monitoring tube according to claim 1, characterized in that, The monitoring resistor module (8) has a monitoring resistor module housing (17) on the outside, a built-in monitoring resistor assembly (18) inside the monitoring resistor module (8), and a monitoring function electrical plug-in (9) on the outside of the monitoring resistor module (8).

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