12 pin PH565-12010 Car Wiring Harness Connector Plug Connector Including Terminals 2.8 Series

2.7.1 Basic structure and main functions of relays
The relays are mainly composed of coils, arms, motion contacts and static contacts. When the current passes through the coil, the magnetic field is generated, the movement of the movement moves, and contacts the static contact, so that the wiring column 1 and the terminal column 2 are turned on, so the main circuit forms a circuit, so that the controlled electrical appliances are put into work. It can be seen that the relay circuit actually includes two parts: the control circuit of the coil work and the main circuit of the contact work. The pair of contacts in the main circuit can only move when the relay coil has a working current .
The main functions of relay for cars are as follows:
① Control strong current with weak small current ;
② Reduce the number of manual switches;
③ The purpose of controlling electrical appliances in order;
④ Protect smaller switches and finer wires to ensure the safe and orderly operation of electrical equipment.
Some models (such as Iveco Auto SOFIM diesel co -rail engines) use many miniaturized relays with internal resistance/diode. Small -alchemy can save assembly space. Relay with resistance/diode, which can reduce or eliminate 300 to 500V peak voltage in the circuit, thereby protecting components in the electronic control system and preventing functional errors. More typical such as a motivation relay, some people may say: If the positive pole of the power supply directly receives the starting end of the motivation, the negative pole of the ignition switch is connected to the other end of the motivation, and the engine can be started. Woolen cloth?
For electrical appliances with relatively large electricity consumption (such as motivation, electric speakers, etc.), if you use the switch to control the flow of the current directly, the control switch will often burn out quickly. Therefore, for large -current electric equipment, intermediate relay is generally controlled, that is, the working status of large current equipment is controlled by disconnection and closing of relay contacts. In fact, the relay actually plays the role of the switch. When connecting the ignition switch, if the large -load works component is overloaded, the relay becomes disconnected and plays an important role in protecting the circuit.
2.7.2 Control principle and classification of relays
You can consider the car relay as a collection of two parts of the control circuit of the coil work and the main circuit of the main circuit of the contact work. In the control circuit of the relay, there is only a smaller working current. This is because the contact capacity of the switch is small and cannot be used to directly control the load with a large power consumption. True. Relaxs are both a control switch and a control object (actuator). Taking the fuel pump relay as an example, it is the control switch of the fuel pump, but the coil of the fuel pump relay relay can only form a circuit through the ground control unit of the electrical control unit in the electrical control unit.
Fuel pump relay working principle
According to the differences in the main functions, car relays can be divided into the following types.
① Electrical switch -type relay. For example, the fuel pump relay of the Santana 2000GSI car AJR engine is installed in the central distribution box to control the power supply of electric fuel pumps, air flow sensors, charcoal solenoid valves and oxygen sensor heater.
② Direction control relay. For example, the relay of the electric seat system is to control the current direction of the two -way motor. When the corresponding switch is replaced, the relay rotates the motor in different directions to achieve the purpose of moving the electric seat in different directions.
Integrated relay. For example, the integrated relay in the front lighting system of the Lexus LS400 car front lighting system. Its function is to perform automatic lights from the front light, fog lights, and rear fog lights, and cut off according to the signal from the Gauge firing wire and the door control light switch. The current of the switch.
Another example is the startup lock and reversing light relay (J226) of the 01M automatic transmission (adopted by the Volkswagen series). The number on the top is "175", which is specifically installed on the No. 15 position of the relay box. When the gear bar is in the forward gear, the J226 can control the motivation circuit to be incompatible to prevent the driver from operating by mistake; when the gear bar is in the R bit, the J226 connects the reversing light. When the J226 fails, the transmission will not enter the emergency state, and the A/TECU will not record the fault code

Simple instructions：

We have product Catalogue，please contact us on skype，WhatsApp or Email.

If you can't find a product on our website or catalog, We deal with over 10,000 items, our catalog doesn’t cover all products. And we are developing 100+ molds yearly, which means around 10 new products are created in our factory. So don’t go away, just send us your photo or part no, we’ll check for you.