WO2020073675A1

WO2020073675A1 - Crankcase breather tube structure

Info

Publication number: WO2020073675A1
Application number: PCT/CN2019/091648
Authority: WO
Inventors: 沈皓
Original assignee: 江阴标榜汽车部件股份有限公司
Priority date: 2018-10-10
Filing date: 2019-06-18
Publication date: 2020-04-16
Also published as: CN209195510U

Abstract

A crankcase breather tube structure, comprising a smooth tube (1). A joint (2) and a valve (3) are provided on each of the two ends of the smooth tube (1); an electric socket (5) is mounted on a side of the joint (2) by means of a fixing seat (4); two wire harnesses (6) are led out from the electric sockets (5); the two wire harnesses (6) are respectively led to the positions of the joints (2) and the valves (3) at the two ends of the smooth tube (1); electric wire terminals (7) are respectively provided at the ends of the two wire harnesses (6); protrusions (9) having threaded holes are respectively provided on the outer sides of the joints (2) and the valves (3); the threaded holes are adapted to fix the electric wire terminals (7) to an engine block by means of bolts; a slot (10) is provided on one side of each protrusion (9); the tails of the electric wire terminals (7) are fixed in the slots (10).

Description

Crankcase vent pipe structure

Technical field

The utility model relates to an automobile pipeline structure, in particular to a crankcase vent pipe which can automatically detect exhaust gas emissions. It belongs to the technical field of automotive pipeline components.

Background technique

The crankcase vent pipe is used for the connection between the engine intake duct and the crankcase. The vacuum in the intake pipe is used to extract the exhaust gas from the crankcase to ensure the exhaust gas circulation inside the engine and prevent the exhaust gas from being discharged into the atmosphere. The structure of the existing vent pipe is: there are two wire harnesses on the outer surface of the smooth pipe, including two wire terminals and an electrical socket, the two ends of the vent pipe are the connector and the valve, and there is a protrusion on the connector and the valve body There is a locking hole inside the boss, which is fixed on the engine block together with the wire terminal combination. When the electric socket is powered on, when the engine is running normally, there will be an alarm phenomenon if the wire terminal is loose. Know that there is air leakage at the connection between the vent pipe and the engine intake pipe or crankcase, which will cause atmospheric pollution and do not meet the emission requirements. Even if there is no wiring harness before, it will not be noticeable even if the air leaks. In the past, as long as the wiring harness was wrapped in styrofoam, even if the process was completed, then the OEM matched the wire terminals with the bosses and then fixed them to the engine block with bolts when installing the vehicle. The round hole of the quasi-boss is then locked with bolts, that is, with the addition of a process, the assembly time and working strength of the whole vehicle are improved.

Utility model content

The technical problem to be solved by the utility model is to provide a crankcase vent pipe structure capable of automatically detecting exhaust gas emissions according to the above-mentioned prior art, which not only can well detect whether it causes exhaust gas emissions and causes air pollution, but also can improve the vehicle's Assembly time.

The technical solution adopted by the utility model to solve the above problems is as follows: a crankcase vent pipe structure includes a smooth pipe, and a joint and a valve are respectively provided at both ends of the smooth pipe, wherein a fixing seat is installed on the side of the joint There is an electric socket, and two wire harnesses are led out from the electric socket, and the two wire harnesses are respectively led to the joints and valve positions of the two ends of the smooth tube, and wire terminals are respectively provided at the ends of the two wire harnesses, outside the joints and the valve Each is provided with a boss with a threaded hole, and the threaded hole is fixed on the engine block together with the wire terminal through a bolt, a clamping slot is opened on one side of the boss, and the tail of the wire terminal is embedded Fix in the card slot.

Preferably, a polyurethane foam layer is formed by foaming on the surface of the smooth tube to wrap the wire harness led from the electrical socket to the valve position.

Compared with the prior art, the advantages of the utility model are:

1. There are two wire harnesses on the outer surface of the smooth tube, including two wire terminals and an electric socket. The wire terminals are fixed on the engine block, and the electric socket is powered on. When the engine is running normally, if the wire terminals are loose An alarm will appear, so that you can quickly know that there is a leak at the connection between the vent pipe and the engine intake pipe or crankcase.

2. Use polyurethane (PUR) material to foam the outer surface of the smooth tube, because this material has the best heat insulation effect, which can ensure that the vent tube will not deform when working in high temperature environment.

3. By opening a slot on the side of the boss, the tail of the wire terminal is embedded in the slot to fix it, this can ensure that the wire terminal is always located on the boss and aligned with the threaded hole, you can directly pass the bolt during installation Fixing, eliminating the process of aligning the wire terminals with the threaded holes, saving 10-15s of vehicle installation time.

BRIEF DESCRIPTION

FIG. 1 is a schematic structural diagram of an embodiment of the utility model.

among them:

Smooth tube 1, joint 2, valve 3, fixing seat 4, electric socket 5, wire harness 6, wire terminal 7, polyurethane foam layer 8, boss 9, and slot 10.

detailed description

The utility model will be described in further detail below with reference to the embodiments of the accompanying drawings.

As shown in FIG. 1, a crankcase vent pipe structure in this embodiment includes a smooth pipe 1, and a joint 2 and a valve 3 are respectively provided at both ends of the smooth pipe 1, wherein the joint 2 passes through the side An electric socket 5 is installed on the fixing seat 4, and two wire harnesses 6 are led out from the electric socket 5, and the two wire harnesses 6 are respectively led to the two ends of the smooth tube 1 and the position of the valve 3, and at the ends of the two wire harnesses 6, respectively Wire terminal 7 is provided, and a polyurethane foam layer 8 is formed by foaming on the surface of the smooth tube 1 to wrap the wire harness leading from the electrical socket 5 to the position of the valve 3, and a connector is provided on the outside of the connector 2 and the valve 3 respectively The boss 9 of the threaded hole is fixed on the engine block together with the wire terminal 7 through the bolt in the screw hole. In order to fix the wire terminal 7 on the screw hole of the boss 9 for easy installation, the boss 9 A slot 10 is opened on one side of the wire, and the tail portion of the wire terminal 7 is embedded in the slot 10 to fix it, so as to ensure that the wire terminal 7 is always located on the boss 9 and aligned with the threaded hole, and can be directly passed through the bolt during installation Fixing, eliminating the need to align wire terminals with threaded holes Sequence, saving 10-15s of vehicle installation time. When the electrical outlet is powered on and the engine is running normally, there will be an alarm if the wire terminals are loose, so that you can quickly know that there is a leak at the connection between the vent pipe and the engine intake pipe or crankcase, which will cause atmospheric pollution , Does not meet the emission requirements. Use polyurethane (PUR) material to foam the outer surface of the smooth tube to form a polyurethane foam layer to wrap the wiring harness leading to the valve side. On the one hand, it can prevent the wiring harness from being exposed or touched by other components to break. On the one hand, because the polyurethane (PUR) material has the best heat insulation effect, it can ensure that the vent pipe will not deform when working in a high temperature environment.

In addition to the above embodiments, the utility model also includes other embodiments. Any technical solution formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the utility model.

Claims

A crankcase vent pipe structure includes a smooth pipe (1), and a joint (2) and a valve (3) are respectively provided at both ends of the smooth pipe (1), wherein the joint (2) is fixed by a side The socket (4) is installed with an electric socket (5), and two wire harnesses (6) are led out from the electric socket (5), and the two wire harnesses (6) are respectively led to the joints (2) and the two ends of the smooth tube (1) The position of the valve (3), and wire terminals (7) are respectively provided at the ends of the two wire harnesses (6), characterized in that a threaded hole is provided on the outside of the joint (2) and the valve (3) respectively A boss (9), which is fixed on the engine block together with a wire terminal (7) through a bolt in the threaded hole, and a clamping slot (10) is opened on one side of the boss (9), the wire The tail of the terminal (7) is embedded in the card slot (10) and fixed.
A crankcase vent pipe structure according to claim 1, characterized in that a polyurethane foam layer (8) is formed by foaming on the surface of the smooth tube (1) to be led from the electrical socket (5) to the valve (3) ) The location harness is wrapped.