The heating system of the vehicle can be divided into two reasons: one is caused by the engine cooling system, and the other is caused by the poor operation of the heating air control mechanism. When repairing, we must first determine which cause is caused. Carry out the corresponding repairs.

The method of discriminating is very simple: look at the temperature of the two inlet pipes of the warm water tank. If both pipes are hot enough, it means that the air volume control mechanism is a problem. Otherwise, if the two pipes are cool, or a hot one Cool, the description is a cooling system problem.

Possible problems with the cooling system:

1. The thermostat is normally open or the thermostat is turned on too early, so that the cooling system prematurely performs a large cycle, and the outside temperature is very low. Especially when the car runs up, the cold air quickly cools the antifreeze, and the engine water temperature does not. Come, the warm air will not be hot.

2. The impeller of the pump is damaged or thrown, so that the flow through the small tank of the warm air is not enough, and the heat does not come.

3. The engine cooling system has air resistance, and the air resistance causes the cooling system to cycle poorly, resulting in high water temperature and no warm air.

Problems with air volume control agencies:

1. First check if the filter is dirty and clogged, clean it, and replace it if necessary.

2. Check the operation of each gear of the blower, and each gear must reach sufficient speed.

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The car wiring harness is the main body of the car circuit, and there is no car circuit without the wire harness. The wire harness refers to a component that is made of a copper material and is crimped to the wire and cable, and then externally molded with an insulator or a metal casing, and bundled with a wire harness to form a component of the connecting circuit.

Automotive wires are also called low-voltage wires, which are different from ordinary household wires. Ordinary household wires are copper single-core wires with a certain hardness. The car wires are all copper multi-core soft wires, some soft wires are as thin as hair, and several or even dozens of soft copper wires are wrapped in plastic insulating tubes, which are soft and not easy to break.

Due to the particularity of the automotive industry, the manufacturing process of automotive wiring harnesses is also more special than other common wiring harnesses.

Wires in automotive wiring harnesses are commonly used with wires with a nominal cross-sectional area of 0.5, 0.75, 1.0, 1.5, 2.0, 2.5, 4.0, 6.0, etc. (the nominal cross-sectional area commonly used in Japanese cars is 0.5, 0.85, 1.25, 2.0). , 2.5, 4.0, 6.0, etc. square millimeters), each of which has a allowable load current value, which is used for wires of different power consumers.

The wire harness is wrapped with a woven thread or a plastic tape. For safety, processing and maintenance, the woven wire package has been eliminated. It is now wrapped with viscous plastic tape. The connection between the harness and the harness, between the harness and the electrical component, using a connector or a wire ear. The connector is made of plastic and has a plug and socket. The wire harness and the wire harness are connected by a plug-in, and the connection between the wire harness and the electrical component is connected by a plug or a wire ear.

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Automotive wiring harness connectors are important connecting components for the various connection points of automotive circuits. Its quality is good or bad, directly affecting the transmission of electricity or signals. Therefore, the selection of a suitable connector is of great significance for ensuring the reliability of the vehicle line.

Selection principle of connectors

According to the basic performance of the connector, the selection of the connector needs to be considered in terms of electrical performance and mechanical properties.

Electrical performance

The connector is the basic component that connects the electrical circuit of the car. Therefore, the electrical parameters of the connector itself are the first considerations when selecting the connector. Electrical performance is divided into three aspects: rated voltage, contact resistance and insulation performance.

a, rated voltage

The rated voltage is also called the working voltage and the rated voltage of the connector. The rated voltage provided by the connector manufacturer is the maximum operating voltage of the connector. For low voltage connectors, the voltage supplied by the manufacturer is typically 50 V. In general, the connector works well below the rated voltage.

The influencing factors are: the insulator material used in the connector, the spacing between the conductive terminals, and the like.

b, contact resistance

The contact resistance directly affects the signal transmission and electrical connection of various electrical equipment of the automobile, and affects the working stability and reliability of each electrical equipment.

The influencing factors are: terminal material, terminal contact interface geometry, terminal positive force, and terminal contact interface surface state.

c, insulation performance

The insulation performance of the connector is also an important electrical property. The parameters reflecting the insulation properties of the insulation resistance and dielectric strength are the most basic electrical parameters to ensure reliable operation of the connector.

The influencing factors are: material, temperature, humidity, chemical test solution, dust, etc.

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The car waterproof Silicone Connector Seal is a special type of car connector. The function of the car connector is generally used to connect various electronic components inside the car to ensure the normal operation of the line and also pay attention to the various interfaces. Not good. Car connectors are generally inside the car, and many people will not pay attention to their own waterproof, this is a wrong idea.

Therefore, the Waterproof Sealing Connector Housing Seal of the car has appeared, which can well solve the water seepage phenomenon that may occur during the cleaning or rainy driving of the car, and ensure that the car will not be affected in the case of water seepage. We can’t hope that it will not see water seepage, but we should be prepared for waterproofing. At this time, the importance of waterproof connectors is reflected.

The durability and reliability of automotive parts are increasingly valued. As a protective material, rubber parts are widely used in automobiles. The importance of the Silicone Weather Pack Seals is self-evident, especially for harness protection of the engine compartment and the lower chassis of the car. Because usually the two places are in a harsh environment with a high probability. There is a concept of “wet zone” to know. In general, we expose the engine compartment and the lower part of the car to the air. The area often affected by rain and water is called “wet zone”, correspondingly, the cockpit and baggage. Boxes and other parts are basically not affected by rain. This part is called “dry area”.

One of the biggest functions of the wire harness seal is to isolate the wet zone and the dry zone. This is an application. The common part is to install one between the engine compartment and the cockpit to separate the dry zone from the wet zone. The rear wheel ABS harness needs to be equipped with a sealing ring, specifically under the rear seat (such as golf). There is a sealing ring separating the inner and outer parts to ensure that the water at the bottom does not leak into the cab during driving;

Each qualified wire harness is subjected to a hermetic seal to ensure that the seal on the wire harness can function. Generally, in the wire harness factory, we use vacuum test equipment to work.

Qiangong is specialized in produce Silicone Weather Pack Seals. Our products are very popular, if you are interested in our products, please contact Connector Cavity Plug Manufacturer as soon as possible. 

In recent years, the environment has been deteriorating, the greenhouse effect has been increasing, and the awareness of low-carbon life has sounded the alarm in people’s hearts. Electric vehicles and hybrid vehicles are favored by the public for their environmental protection and energy saving advantages. Auto engineers began to increase the funding, starting from the automotive industry’s important electronic components automotive wiring harness, automotive connectors, power supply, etc., and constantly develop energy-saving and environmentally-friendly vehicles that conform to the development of the times.

For today’s automotive engineers, improving fuel economy and reducing greenhouse gas (GHG) emissions have become important design guidelines. Obviously, electric and hybrid vehicles are the solution to these challenges, but the technology to reduce the weight of the car can also provide some obvious benefits, because reducing vehicle weight and rolling resistance can reduce energy demand and effectively reduce carbon dioxide emissions. 

In addition to improving component integration and the use of advanced materials to help automakers reduce vehicle weight, harness weight is also an area of particular interest and has attracted design engineers to re-examine their designs to prevent automotive power. The function is damaged due to a large current fault condition.

One of the challenges faced by design engineers is to retain or add circuit protection devices that help protect automotive electronic systems from possible overload conditions while reducing overall cost and weight. Since a car can typically contain hundreds of circuits and more than one kilometer of wire, the complexity of the wiring system can make traditional circuit design techniques difficult to use and can lead to unnecessary over-design.

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The car wiring harness is known as the “vessel” of a car and is generally considered to be the central nervous system of a car, which connects the on-board computer with various related functions on the vehicle. Whether the manufacturing technology of automotive wiring harness is advanced is an important aspect that affects the performance of automobiles.

When the automobile wiring harness is through the hole, the seal is generally used for the transition to play the role of wear resistance, waterproofing, sealing, etc. The design of the Single Wire Seal has great influence on the overall performance of the automobile wiring harness, and the design also has many difficulties, mainly distributed in the following Location: engine and cab interface, front and cab interface, four-door and compartment interface, fuel tank inlet. There are three common materials for automotive wire harness seals:

One, neoprene. Its characteristics are good resistance to ozone, heat aging, oil resistance, etc., and it is flame retardant and self-extinguishing; but its low temperature resistance is not good.

Second, natural rubber. The characteristics of the wire harness material are good elasticity and mechanical strength, excellent flex resistance, high tear strength and good cold resistance. Disadvantages: The aging resistance is not good, it is not resistant to oil and ozone, and it is flammable.

Third, Silicone Connector Seal . Heat resistance, cold resistance and weather resistance are good; the disadvantage is that it is not resistant to oil. The characteristics of EPDM: weather resistance, ozone resistance, heat resistance, corrosion resistance, acid and alkali resistance, etc., and high strength and high expansion ratio; Disadvantages: poor adhesion, and no natural elasticity Good rubber and poor oil resistance.

Four, EPDM. It is also the most important common material for wire harnesses. Many automotive wire harness seals use it, which has good comprehensive performance and strong adaptability.

When repairing the door with sealing flange, attention should be paid to repairing the damaged sealing flange and accurately restoring the shape of the original flange. When replacing the door, attention must be paid to the application of folding glue at the flanging occlusion of the inner and outer panels of the new door, and to plug some small craft holes left during stamping with tape.

When repairing automobile lines, the sealing rings of all body holes and holes should be installed in place, because these Automotive Connector Seal not only play a sealing role, but also protect the harness. If the Automotive Connector Seal is damaged or the harness can rotate or move in the sealing ring, the sealing ring should be replaced, and it should be firmly assembled with the body holes and holes, so as to make the harness stable.

After the window glass is damaged, the curvature of the original window glass should be replaced. At the same time, the glass guide groove and sealing strip should be checked for damage. Because the window can not be restored to its original shape after repairing, at this time, besides ensuring that the window can be easily pulled or lifted, we should also pay attention to the sealing around the window when the window is closed.

When changing the roof, a layer of conductive sealant should be coated on the press joint around the roof first, and then the sealant should be coated all over the flow tank and joint after welding. This not only helps to seal the car body, but also prevents the early rust of the car body caused by water accumulation in the flange weld. When assembling the door, a whole piece of sealing isolation film should be pasted on the inner panel of the door below the window. If there is no formed sealing isolation film, it can be replaced by ordinary plastic paper. Then the sealing isolation film is pasted and compacted, and finally the interior panel is assembled.

If the car does not have a wiring harness as a carrier, it will not function properly. Sometimes the wire harness will be damaged due to improper operation during use, causing unnecessary losses. What do you know about the reasons for the use of the wire harness?

1. Mishandling: The Single Wire Seal Supplier said that it may be caused by the staff. There are many reasons for the wiring harness in the installation and use. It may be accidentally damaged by the staff during installation or overhaul; it may also be the installation location. The error caused and so on.

2, short circuit: There may be problems such as short circuit of the device itself, which will also affect the normal operation of the equipment. If it is not timely solved, it may be more likely to burn out the product. These small accidents can be solved through overhaul.

3. Cable aging: When the wire harness is used for a long time, it will naturally oxidize; or the insulating strip on the surface of the wire harness may cause failure due to time problem; it may also be that the wire harness is deformed or the contact is poor, which causes different problems.

4, the quality is not enough: Because the wire harness market is widely used, there are many wire harness manufacturers on the market, and the quality of the wire harness on the market is also good or bad, so everyone should pay attention when purchasing.

Qiangong is a China manufacturer of Automotive Wire Harness Seals . We have a high-tech work shop. We have a complete quality management system. Choose us, you can be get most careful and thoughtful service!

The Automotive Connector Seal is a common component used in vehicles to transmit current or signals.

The connectors are divided into categories, such as: sealing (for vehicle wet areas), unsealed (for vehicle dry areas), and safety related categories (airbag related). At the beginning of the design, according to the current carrying capacity of each PIN pin, PIN pins of different widths are selected, and then a chamber for accommodating different PIN pins is formed on the connector, thereby forming a housing for accommodating a plurality of PINs.

This paper analyzes the design ideas of the connector design from several different appearance structures of the connector and the assemblability of the molded case. They are CPA, Connector Position Assurance; Lever /Slider (lever), auxiliary mechanism; waterproof seal; TPA (Terminal Position Assurance), terminal secondary locking mechanism; Cavity, terminal chamber.

First of all, CPA, its function is to ensure that the buckle of the primary locking mechanism will not be easily withdrawn after the assembly of the molded case and the electrical interface is in place. Due to its special function, the CPA must be designed to ensure the operability and identifiability of the workers. Sex, this requires that the CPA must be an independent mechanism on the molded case, and must also have a special color mark.

TPA (Terminal Position Assurance), terminal secondary locking structure, not all terminals need secondary locking structure, VW requirements are 2.8mm (including 2.8) terminal width should use TPA, to ensure the installation of wire harness factory workers Convenient, the color of the TPA is also required to be identifiable, and the assembly must have a clear hand. To ensure that the TPA does not automatically enter the locking position during transport to the wire harness factory, the anti-locking mechanism is required on the TPA. of.

Connector Cavity Plug , terminal chamber, plastic housing to accommodate the terminal mechanism, in order to ensure that the electrical circuit is clear and reliable, the chamber must be numbered on the molded case, some OEMs are defined by ABCD, and some are defined by 1234. In order to ensure the operability of the wire harness factory workers, the terminal should enter the chamber smoothly into a locked position, and no strong push is allowed. This may cause damage to the key mechanism of the terminal, and the terminal should not be used. In the case of auxiliary tooling, it is pushed into the molded case. The pushing force is generally required to be no more than 15N. The GM requirement is 30N. After the terminal is pushed in, the top of the chamber needs to ensure that the terminal is not damaged under the force of 30N. The GM requirement is 50N. If not satisfied, the special mechanism design that protects the chamber from being damaged by the top needs to be considered.