12015323 12015284 15324982 Rubber Seal Super Sealed Silicone Wire Seals For Auto Connector

5) The matching of the line fuse of the line is usually connected to the line in the line. The purpose is to protect the wire beam and electricity equipment. Such protection generally refers to over -current protection. When passing, the line can be disconnected in time to protect other components from being burned out. For engine wire beams, when choosing a melting wire or a fuse, such as the engine ECU and the electrical appliance system of the cab, it has a great impact on the performance of the vehicle. The battery, etc.; the electrical components that are susceptible to other devices must be set separately; before the melting wire or the fuse of the fuse, the wiring beam insulating layer cannot be melted or burned.

The choice of fuse wire must consider the current characteristics of the load and the working environment of the fuse. If the melting value is too small, the fuse wire is easy to fuse, and the system can not work properly. The role of protecting the line. The choice of fuse value can be referred to the following formulas:

If = in / (RRX0.75) (3)

In the formula: the ideal value of the rated current of the IF -fuse; IN -normal working current value; RR -ambient temperature discount coefficient; 0.75 -load characteristic coefficient. Among them, in = p / un, you can find it according to the power of the load and the rated operating voltage, and then obtain the temperature reduction rate at the temperature reduction rate at the operating environment of the fracture wire through the temperature discount rate of the fuse. Enter the formula (3), you can calculate the IF, and finally select the fuse value corresponding to the same or slightly larger rated current value in the melting wire specification table.

1.3 Electromagnetic shielding design

As the application of electronically controlled engines becomes wider and wider, more and more electrical devices on the engine, the radiation of the electrical components and interference between each other, leading to the higher and higher background noise of the engine itself, and the electromagnetic pollution is getting worse. It has attracted widespread attention. Wire beam products are used to transmit voltage and various electrical signals, which is equivalent to a large "antenna", which also provides electromagnetic interference media and channels. How to improve the anti -electromagnetic interference ability of the car engine wire has also become an important issue.

To avoid interference, the first thing that comes to mind is "shielding". The shielding is to use metal shielding body to isolate the interference of the electromagnetic field, which can prevent foreign electromagnetic field interference and prevent the radiation of the electromagnetic field to external interference. For engine wire beams, the current electromagnetic shielding methods are mostly shielded by electrostatic, and it is mostly implemented with the method of wrap the tape from the outside of the beam. The excess charge is transmitted to the earth by shielding the tape iron. For cases with high shielding requirements, the engine controller, the sensor's wiring connector and the wire beam pairing access will use a metal shell to connect to the shielded tape, which will guarantee the shielding effect of the wire beam.

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