阅读说明：本技术 一种曲轴箱通气管、检测装置和检测方法 (Crankcase breather pipe, detection device and detection method ) 是由 林可为 刘志同 孙坤 王明锐 于 2021-07-07 设计创作，主要内容包括：本发明公开了一种曲轴箱通气管,涉及曲轴箱通风管监测领域,解决了现有通风管检测不精准的问题。包括管路本体和电器插接件；管路本体包括由内而外依次套接的第一绝缘层、第一导电层、第二绝缘层、第二导电层和第三绝缘层；电器插接件包括第一插接件和第二插接件,第一导电层的第一端与第二导电层的第一端均与第一插接件连接,第一导电层的第二端与第二导电层的第二端均与第二插接件连接；第一导电层、第一插接件、第二导电层和第二插接件构成通气管电路。本发明公开了一种曲轴箱通气管检测装置,包括空气管、PCV阀、CPU和曲轴箱通气管。本发明公开了一种曲轴箱通气管检测方法,使用了一种曲轴箱通气管检测装置。本发明不易损坏,检测准确率高。(The invention discloses a crankcase ventilation pipe, relates to the field of crankcase ventilation pipe monitoring, and solves the problem that the existing ventilation pipe is not accurate in detection. Comprises a pipeline body and an electrical appliance plug connector; the pipeline body comprises a first insulating layer, a first conducting layer, a second insulating layer, a second conducting layer and a third insulating layer which are sequentially sleeved from inside to outside; the electrical appliance plug connector comprises a first plug connector and a second plug connector, wherein the first end of the first conducting layer and the first end of the second conducting layer are both connected with the first plug connector, and the second end of the first conducting layer and the second end of the second conducting layer are both connected with the second plug connector; the first conducting layer, the first plug connector, the second conducting layer and the second plug connector form a breather pipe circuit. The invention discloses a crankcase breather pipe detection device which comprises an air pipe, a PCV valve, a CPU and a crankcase breather pipe. The invention discloses a crankcase breather pipe detection method, which uses a crankcase breather pipe detection device. The invention is not easy to damage and has high detection accuracy.)

1. A crankcase breather pipe is characterized by comprising a pipeline body and an electrical appliance plug connector;

the pipeline body comprises a first insulating layer, a first conducting layer, a second insulating layer, a second conducting layer and a third insulating layer which are sequentially sleeved from inside to outside;

the electric appliance plug connector comprises a first plug connector and a second plug connector,

the first conducting layer and the second conducting layer are provided with a first end and a second end which are opposite, the first end of the first conducting layer and the first end of the second conducting layer are both connected with the first plug connector, and the second end of the first conducting layer and the second end of the second conducting layer are both connected with the second plug connector;

the first conducting layer, the first plug connector, the second conducting layer and the second plug connector form a breather pipe circuit.

2. The crankcase breather tube of claim 1, wherein the breather tube circuit includes an electrical resistance.

3. The crankcase breather tube of claim 2, wherein the resistor is annular, wherein the resistor has a diameter equal to a diameter of the second conductive layer on which the resistor is disposed, wherein the second conductive layer comprises first and second layers spaced axially along the tube body, and wherein the first and second layers are connected by the resistor.

4. The crankcase breather tube of claim 3, wherein the material of the first and second conductive layers is graphitized carbon cloth.

5. The crankcase breather tube of claim 1, wherein the first, second, and third insulating layers are all rubber in material.

6. A crankcase ventilation tube detection device comprising an air tube, a PCV valve, a CPU and a crankcase ventilation tube according to claims 1-5;

the air pipe is provided with a third plug connector, the third plug connector and the first plug connector are male and female plug connectors, and the third plug connector is connected with the CPU;

a fourth plug connector is arranged on the PCV valve, and the fourth plug connector and the second plug connector are male and female plug connectors;

the first connector is connected with the third connector, and the second connector is connected with the fourth connector, so that the CPU, the first conductive layer and the second conductive layer form a closed loop.

7. The Q of claim 6, wherein the crankcase breather tube has first and second opposing ends, the first end of the crankcase breather tube is nested within the air tube, the second end of the crankcase breather tube is nested within the PCV valve, the third plug is disposed within the air tube, and the fourth plug is disposed within the PVC valve.

8. The Q of claim 7, wherein the detection device further comprises a plurality of connector holders for holding respective electrical connectors.

9. The Q of claim 7, wherein the detection device further comprises two clips, one clip disposed on the air tube and the other clip disposed on the PCV valve.

10. A crankcase ventilation duct detection method, characterized in that the crankcase ventilation duct detection device according to any one of claims 6 to 9 is used to determine the connection state of the crankcase ventilation duct based on the state of the electric signal of the closed loop.

Technical Field

The invention relates to the field of crankcase ventilation pipe monitoring, in particular to a crankcase ventilation pipe, a detection device and a detection method.

Background

In order to meet the national standard, the conventional fuel automobile design needs forced diagnosis on a Crankcase vent pipe, namely whether a pipeline between a Crankcase and a PCV (Positive Crankcase Ventilation) valve or a pipeline between the PCV valve and an air pipe is disconnected or not is monitored by using an on-board diagnostic system (OBD), but the conventional on-board diagnostic system mainly achieves the purpose of judging whether each pipeline is closed or not by adding a lead between the Crankcase and the PCV valve or the PCV valve and the air pipe or judging whether the lead is connected or not, so that the diagnostic system is not accurate, the lead is easy to be affected by the external environment to loosen or fall off, and the diagnostic accuracy is further reduced.

Disclosure of Invention

The invention aims to provide a crankcase breather pipe, a detection device and a detection method, and aims to solve the problems that the existing diagnosis system provided by the background art is not accurate, a lead is easy to loosen or fall off due to the influence of an external environment, and the diagnosis accuracy is further reduced.

In order to achieve the above purpose, the technical scheme of the invention is as follows:

a crankcase breather pipe comprises a pipeline body and an electrical appliance plug connector;

the pipeline body comprises a first insulating layer, a first conducting layer, a second insulating layer, a second conducting layer and a third insulating layer which are sequentially sleeved from inside to outside;

the electric appliance plug connector comprises a first plug connector and a second plug connector,

the first conducting layer and the second conducting layer are provided with a first end and a second end which are opposite, the first end of the first conducting layer and the first end of the second conducting layer are both connected with the first plug connector, and the second end of the first conducting layer and the second end of the second conducting layer are both connected with the second plug connector;

the first conducting layer, the first plug connector, the second conducting layer and the second plug connector form a breather pipe circuit.

Preferably, a resistor is arranged on the breather pipe circuit.

Preferably, the resistor is in a circular ring shape, the diameter of the resistor is equal to that of the second conducting layer, the resistor is arranged on the second conducting layer, the second conducting layer comprises a first layer and a second layer which are arranged at intervals along the axial direction of the pipeline body, and the first layer and the second layer are connected through the resistor.

Preferably, the material of the first conductive layer and the second conductive layer is graphitized carbon cloth.

Preferably, the materials of the first insulating layer, the second insulating layer and the third insulating layer are all rubber.

A crankcase ventilation pipe detection device comprises an air pipe, a PCV valve, a CPU and the crankcase ventilation pipe;

the air pipe is provided with a third plug connector, the third plug connector and the first plug connector are male and female plug connectors, and the third plug connector is connected with the CPU;

a fourth plug connector is arranged on the PCV valve, and the fourth plug connector and the second plug connector are male and female plug connectors;

the first connector is connected with the third connector, and the second connector is connected with the fourth connector, so that the CPU, the first conductive layer and the second conductive layer form a closed loop.

Preferably, the crankcase breather pipe has a first end and a second end opposite to each other, the first end of the crankcase breather pipe is sleeved in the air pipe, the second end of the crankcase breather pipe is sleeved in the PCV valve, the third plug connector is arranged in the air pipe, and the fourth plug connector is arranged in the PVC valve.

Preferably, the detection device further comprises a plurality of plug connector supports, and the plug connector supports are used for supporting the plug connectors of the electrical appliances.

Preferably, the detection device further comprises two clamps, one clamp being disposed on the air tube and the other clamp being disposed on the PCV valve.

A crankcase ventilation pipe detection method is characterized in that the crankcase ventilation pipe detection device is used for judging the connection state of a crankcase ventilation pipe based on the electric signal state of a closed loop.

The invention has the beneficial effects that:

according to the technical scheme, the first conducting layer and the second conducting layer are separated through the second insulating layer, so that the first conducting layer and the second conducting layer can be used as conducting wires respectively, the influence of external environment on the first conducting layer and the second conducting layer is avoided, each circuit plug connector is arranged in the crankcase ventilation pipe, the arrangement space in a vehicle is saved, in addition, if the ventilation pipe is damaged and broken to generate an air leakage phenomenon, the first conducting layer and the second conducting layer are correspondingly damaged, the electric conductivity of the first conducting layer and the second conducting layer is influenced and is easy to monitor, and therefore when the crankcase ventilation pipe is matched with a detection device, the crankcase ventilation pipe has high accuracy;

according to the crankcase ventilation pipe detection device disclosed by the invention, the falling and loosening of the crankcase ventilation pipe and the damage of the crankcase ventilation pipe body can be detected acutely by virtue of the characteristics that the crankcase ventilation pipe has the first conducting layer and the second conducting layer; moreover, no lead needs to be additionally arranged outside the pipeline, and each circuit plug connector is internally arranged, so that the arrangement space in the vehicle is saved, the condition of being interfered by the external condition is less, and the diagnosis accuracy is high;

according to the crankcase ventilation pipe detection method disclosed by the invention, the accurate judgment of the connection state of the crankcase ventilation pipe is realized through the structure and the characteristics of the crankcase ventilation pipe, the accuracy is high, the reference is conveniently provided for maintenance personnel, and the rapid detection and maintenance are realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a pipeline body according to embodiment 1 of the present invention;

FIG. 2 is a schematic sectional view of a piping body according to embodiment 1 of the present invention;

FIG. 3 is a schematic perspective view of embodiment 2 of the present invention;

fig. 4 is a schematic structural diagram of a closed loop in embodiment 2 of the present invention.

The labels in the figure are: 1-pipe body, 101-first insulating layer, 102-first conducting layer, 103-second insulating layer, 104-second conducting layer, 105-third insulating layer, 201-first plug, 202-second plug, 203-third plug, 204-fourth plug, 3-resistor, 4-CPU.

Detailed Description

Example 1

The technical solutions in the present embodiments will be clearly and completely described below with reference to the accompanying drawings in the present embodiments, which, however, should not be construed as limiting the invention to specific embodiments, but are for explanation and understanding only:

referring to fig. 1 and 2, fig. 1 is a schematic structural diagram of a pipeline body in embodiment 1 of the present invention, and fig. 2 is a schematic sectional structural diagram of the pipeline body in embodiment 1 of the present invention; the embodiment provides a crankcase breather pipe, which comprises a pipeline body 1 and an electrical appliance connector.

The pipeline body 1 comprises a first insulating layer 101, a first conducting layer 102, a second insulating layer 103, a second conducting layer 104 and a third insulating layer 105 which are sequentially sleeved from inside to outside, the first conducting layer 102 and the second conducting layer 104 are separated by the second insulating layer 103, so that the first conducting layer 102 and the second conducting layer 104 can be respectively used as conducting wires, the first conducting layer 102 and the second conducting layer 104 can be made of graphitized carbon paper or carbon cloth or made of materials with a conducting function such as platinum-carbon catalysts, the first insulating layer 101, the second insulating layer 103 and the third insulating layer 105 can be made of insulating materials such as nylon and rubber, and the first insulating layer 101, the second insulating layer 103 and the third insulating layer 105 can be made of different materials.

The electrical appliance plug connector comprises a first plug connector 201 and a second plug connector 202, the first conducting layer 102 and the second conducting layer 104 are provided with a first end and a second end which are opposite to each other, the first end of the first conducting layer 102 and the first end of the second conducting layer 104 are both connected with the first plug connector 201, the second end of the first conducting layer 102 and the second end of the second conducting layer 104 are both connected with the second plug connector 202, the first conducting layer 102, the first plug connector 201, the second conducting layer 104 and the second plug connector 202 form a vent pipe circuit, and the first conducting layer 102 and the second conducting layer 104 are not communicated under the condition that the first plug connector 201 and the second plug connector 202 are not connected with other plug connectors.

The first conducting layer 102 and the second conducting layer 104 of the pipeline body 1 have the function of conducting wires, the crankcase breather pipe in the embodiment is used as a breather pipe of the testing device, the conducting wires do not need to be additionally arranged outside the pipeline, the influence of the external environment on the first conducting layer 102 and the second conducting layer 104 is avoided, and the false alarm rate of the testing device can be greatly reduced. In addition, if the vent pipe is damaged and broken to generate a gas leakage phenomenon, the first conductive layer 102 and the second conductive layer 104 are also damaged correspondingly, the electrical conductivity of the first conductive layer 102 and the second conductive layer 104 will be affected and is easily monitored, and therefore, the crankcase vent pipe of the present embodiment has high accuracy when being matched with the detection device.

In this embodiment, the specific structure is as follows:

in order to avoid short circuit, the snorkel circuit has a certain resistance, the first conductive layer 102 and the second conductive layer 104 may use different conductive materials, so as to achieve the purpose of passing current and avoiding short circuit of the snorkel circuit, of course, the resistor 3 may be disposed on the snorkel circuit, the resistor 3 may be disposed on the first conductive layer 102, or may be disposed on the second conductive layer 104, referring to fig. 3, the resistor 3 of this embodiment is disposed on the second conductive layer 104. Specifically, the resistor 3 is annular, the diameter of the resistor 3 is equal to that of the second conductive layer 104, the second conductive layer 104 includes a first layer and a second layer which are axially arranged along the pipeline body 1 at intervals, and two opposite end faces of the resistor 3 are respectively connected with the end face of the first layer and the end face of the second layer, so that the first layer and the second layer are connected through the resistor 3.

In this embodiment, the conductive layer is made of graphitized carbon cloth, and the first insulating layer 101, the second insulating layer 103, and the third insulating layer 105 are made of rubber. Graphitized carbon cloth and rubber all have flexibility, can avoid pipeline body and other external structures hard contact, and the wearability is strong, and is not fragile, long service life.

Example 2

Referring to fig. 3 and 4, fig. 3 is a schematic perspective view of embodiment 2 of the present invention; fig. 4 is a schematic structural diagram of a closed loop in embodiment 2 of the present invention. The present embodiment provides a crankcase ventilation line detection device comprising an air line, a PCV valve, a CPU4 and a crankcase ventilation line as in embodiment 1.

The air pipe is provided with a third plug connector 203, the third plug connector 203 and the first plug connector 201 are mutually a male plug connector and a female plug connector, and the third plug connector 203 is connected with a CPU 4. The PCV valve is provided with a fourth plug connector 204, and the fourth plug connector 204 and the second plug connector 202 are male and female plug connectors.

Specifically, the crankcase breather pipe has a first end and a second end opposite to each other, the first end of the crankcase breather pipe is sleeved in the air pipe, the second end of the crankcase breather pipe is sleeved in the PCV valve, the third plug connector 203 is arranged in the air pipe, and the fourth plug connector 204 is arranged in the PVC valve. The detection device further comprises two clamps, wherein one clamp is arranged on the air pipe and used for fixing the air pipe and the first end of the crankcase breather pipe, and the other clamp is arranged on the PCV valve and used for fixing the PCV valve and the second end of the crankcase breather pipe.

In order to stably install each connector at each corresponding position, the detection device further comprises a plurality of connector supports for supporting and fixing each electrical connector. The support frame comprises an annular support frame and a plate-shaped support frame. The third plug connector 203 and the fourth plug connector 204 can be fixed by adopting annular support frames, for example, the annular support frame supporting the third plug connector 203 is sleeved in the air pipe, and the third plug connector 203 is fixed between the annular support frame and the inner wall of the air pipe; first plug connector 201 and second plug connector 202 all can adopt the platy support frame to fix, if support first plug connector 201 platy support frame and set up along the axial of crankcase breather pipe, the one end fixed mounting of platy support frame is on the inner wall of pipeline body 1, the other end of platy support frame outwards extends under first plug connector 201 and with first plug connector 201 fixed connection.

Referring to fig. 4, in the assembled crankcase ventilation duct detecting apparatus, the first connector 201 is connected to the third connector 203, the second connector 202 is connected to the fourth connector 204, and the CPU4, the first conductive layer 102, and the second conductive layer 104 form a closed loop.

The CPU4 can judge whether the crankcase ventilation pipe falls off or is damaged by judging the current condition of the closed loop, specifically, when the pipeline falls off, the male and female plug connectors at the falling off part are disconnected, the circuit is disconnected, and the CPU4 can judge that the crankcase ventilation pipe falls off; when the pipeline is loosened, the male and female plug connectors at the loosened position are not completely disconnected, but the connection is unstable, at the moment, the electric signal in the closed loop obviously fluctuates, and the CPU4 can judge that the crankcase ventilation pipe is loosened; when the circuit is broken, the circuit is not disconnected, but the broken part is not conducted, so that the electric signal in the closed loop circuit is obviously changed, and the CPU4 can sensitively detect the breakage of the crankcase breather pipe.

The crankcase ventilation pipe detection device in the embodiment can detect the falling off and loosening of the crankcase ventilation pipe and the breakage of the crankcase ventilation pipe body 1 acutely by the characteristics of the crankcase ventilation pipe including the first conductive layer 102 and the second conductive layer 104; and each circuit plug connector is built-in, so that the arrangement space in the vehicle is saved, the condition of interference from external conditions is less, and the diagnosis accuracy is high.

The detection device can also be provided with a corresponding warning mechanism, the warning mechanism is connected with the CPU4, and when the crankcase ventilation pipe is loosened or damaged, the CPU4 sends an instruction to the warning mechanism to enable the warning mechanism to send a warning signal.

Example 3

This embodiment provides a crankcase ventilation duct detection method using the crankcase ventilation duct detection device of embodiment 2, and determining the connection state of the crankcase ventilation duct based on the electrical signal state of the closed loop of the crankcase ventilation duct detection device.

Specifically, when the CPU4 cannot receive the electric signal of the closed loop circuit, it can be determined that the crankcase ventilation pipe is disconnected;

when the closed loop electric signal received by the CPU4 is strong and weak, and has multiple fluctuation, the pipeline looseness of the crankcase ventilation pipe can be judged;

when the closed loop electric signal received by the CPU4 changes suddenly and the signal strength is maintained at the changed signal strength, the crankcase ventilation pipe damage can be judged.

According to the detection method, the connection state of the crankcase ventilation pipe is accurately judged through the structure and the characteristics of the crankcase ventilation pipe, the accuracy is high, reference is conveniently provided for maintenance personnel, and quick detection and maintenance are realized.

It is to be understood that the above examples are merely illustrative for clarity of description and are not limiting on the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.