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Pipeline disconnection detection system based on conducting loop mechanism

A detection system and conductive circuit technology, applied in the direction of engine measuring devices, pipe components, pipe joints, etc., can solve the problems of cumbersome installation, easy problems, and no diagnostic system, etc., and achieve the effect of simple structure

Pending Publication Date: 2017-12-15
TIANJIN DATRO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the existing solutions mainly do not include a diagnostic system, and some diagnostic systems use conductive wires, but the gas circuit and circuit at both ends of the joint structure are separated. It is necessary to connect the crankcase ventilation pipe and then connect the conductive wire connector. complex, prone to problems
In addition, as the conductive wires of these existing diagnostic systems grow over time, the outer plastic skin of the conductive wires may wear out, making the inner metal wires contact with other parts, which has some adverse effects on the diagnosis

Method used

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  • Pipeline disconnection detection system based on conducting loop mechanism
  • Pipeline disconnection detection system based on conducting loop mechanism
  • Pipeline disconnection detection system based on conducting loop mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Along with the growth of service time, the insulating layer of the circuit surface that connects ECU unit in disconnection detection circuit 10 is corroded or wears and causes to contact with other automobile metal parts, may produce the positive pole of disconnection detection circuit 10 and produce grounding (being power terminal ground), we call it a short circuit to ground. If the upper resistor architecture is used inside the ECU, such as image 3 and 4 When the crankcase ventilation pipe joint is connected to the positive conductive wire of the ECU unit and the ground is short-circuited, as shown Figure 6 As shown, the ECU unit detects that the disconnection detection line voltage U_pcv is close to 0V. If there is no resistance R_pcv in the detection circuit 10, the resistance of the conductive wire inside the crankcase ventilation pipeline is almost zero (it can be regarded as R_pcv≈0), and the voltage of U_pcv is close to 0V; The open detection circuit 10 is...

Embodiment 2

[0052] As the use time increases, the insulating layer on the surface of the disconnection detection circuit 10 is corroded or worn, and the negative pole of the disconnection detection circuit 10 may be connected to the power supply, which is called a short circuit to the power supply. If the lower resistor architecture is used inside the ECU unit, such as Figure 5 As shown, when the crankcase ventilation pipe joint is connected to the negative conductive wire of the ECU and the power supply is short-circuited, as shown in Figure 8 As shown, the ECU detects the disconnection detection circuit voltage U_pcv'=U (the input voltage of the ECU unit is assumed to be U); if there is no resistance R_pcv' in the detection circuit 10, the resistance of the conductive wire inside the crankcase ventilation pipeline is almost zero ( It can be regarded as R_pcv'≈0V), and the voltage of U_pcv' is close to U. Therefore, in the case of a short circuit between the negative electrode and the ...

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Abstract

The invention provides a pipeline disconnection detection system based on a conducting loop mechanism. A crankcase ventilation pipeline system comprises a main pipeline, male connectors connected with an engine crankcase or air inlet system are connected to the main pipeline, and the main pipeline is provided with connecting terminals; the pipeline disconnection detection system comprises a disconnection detection circuit fixed to the main pipeline and at least one connecting terminal, conducting switches are arranged on the portions, located in the connecting terminals or the joints of the male connectors and the connecting terminals, of the disconnection detection circuit, the conducting switches are switched on by inserting the male connectors into the connecting terminals or inserting male connector lock rings of the male connectors into the connecting terminals, the two ends of the disconnection detection circuit are connected with the power supply end and the ground end of an ECU unit respectively, and the disconnection detection circuit is provided with a resistor unit which is connected with the power supply end of the ECU unit and used for diagnosing the condition that the disconnection detection circuit has a short circuit to a power supply and the ground. According to the pipeline disconnection detection system based on the conducting loop mechanism, the completeness of a ventilation pipeline can be effectively detected.

Description

technical field [0001] The invention relates to the field of automobile pipeline detection, in particular to a pipeline disconnection detection system based on a conductive loop mechanism. Background technique [0002] When the engine is working, due to the high pressure generated in the combustion chamber, there is a gap in the piston ring or when the piston ring loses a certain sealing effect, etc., the exhaust gas, unburned net oil gas, soot particles and water vapor in the combustion chamber will pass through the piston and the cylinder wall. Clearance string to crankcase. [0003] At present, most engines use a closed crankcase ventilation system, mainly to avoid the volatilization of fuel components into the air, resulting in excessive vehicle evaporative emissions. Extraction, the current mainstream solution is to extract air through negative pressure from the clean side of the air filter or the connection pipe of the intake manifold to the engine cylinder head cover...

Claims

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Application Information

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IPC IPC(8): F01M13/00
CPCF01M13/00F01M2250/00F02D41/22F02D2250/08F01M11/10F16N2260/00Y02T10/40F02B77/08F16L25/01F16L2201/10
Inventor 贾维新牟江峰
Owner TIANJIN DATRO TECH CO LTD
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