1744201-1 Car Connector Connects To The Plug-in Terminal

3) Thermal protection of wiring harness

Temperature has a great impact on wire harnesses, which is not only reflected in the heat resistance of the wire harness material itself, but also changes in electrical properties caused by temperature changes. In the wire harness layout design, special attention should be paid to the wire harness layout in high-temperature areas. On a car, the high temperature areas mainly include the following areas

exhaust pipe

exhaust manifold

Exhaust gas recirculation pipe or valve

catalytic converter

Regarding temperature, there are the following requirements for wiring harness layout:

The minimum distance between the wiring harness and the device in the high-temperature area is no less than 150mm, and the catalytic converter needs to be at least 300mm, and a high-temperature-resistant wrapping must be used. 

Many factors will affect the feasible space for wiring harness arrangement near the heat source (air flow, heat transfer mode, heat degree, etc.), so it is necessary to obtain accurate temperature field data to determine how to arrange the wiring harness and which protection to choose. For high-temperature areas, after the prototype comes out, temperature field analysis needs to be performed to determine the rationality of the wire harness layout and wire harness wrapping design.

4) Waterproof and dustproof protection of wiring harness

Waterproof and dustproof protection are often considered during the wiring harness layout process. For this point, the wiring harness layout mainly has the following aspects:

When the wiring harness passes through the sheet metal, it is necessary to set a drip point (above 75mm) to prevent external water or other liquids from flowing into the body through the wiring harness, or under the influence of the siphon effect, water may flow into the cab connector along the wiring harness.

Setting the drip point when wiring harness passes through the hol

In areas where water may be splashed in wet areas, such as the engine compartment, in order to avoid water entering the plug-in, the design should allow the plug-in connector to be placed horizontally and fixed (the direction of the plug-in outlet is parallel to the underbody of the vehicle body).

It is forbidden to place connectors and grounding terminals in places where there is water in the wet area or where water flows in the sink

Wet area buckle ties should be in the form of gaskets.

The fixed point of the wiring harness in the waterproof membrane on the door sheet metal should be more than 30mm away from the glue coating boundary of the waterproof membrane to prevent water leakage after the waterproof membrane is jacked up. The opening position of the waterproof membrane must be higher than the branch point of the wiring harness to prevent water from flowing backward along the wiring harness Get into the car.

Corresponding protection needs to be added to the wiring harness at the wheel and under the floor. Avoid driving on off-road, gravel roads or winter ice and snow roads, hard stones, ice and snow blocks will be splashed and the wiring harness will be smashed.

The front and rear wiring harnesses should be fixed at the high position of the wiring harness, avoiding the lowest point, and the waterproof and dustproof protection of the wiring harness should be done, but it is necessary to check whether it is convenient for assembly.

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