The working principle of Chery car connection anti theft relay is not a little more detailed

If you don't have an anti-theft alarm installed, it's very simple to modify it yourself, buy a high-power five-pin relay, one end of the relay coil is connected to the car key acc through the brake switch, and the other end is connected to the car key acc. Cut one of the wires of the starter motor into two ends, one end is connected to the common end of the relay, and the other end is connected to the normally open end of the relay. The naming of the individual pins of the 5-pin relay is clear on the web.

Turn the key to the ACC, the car cannot be started because the relay disconnects the power cord of the starter motor, and the car cannot be started by pulling out the wire at the ACC and directly connecting to the power cord. If you need to start driving, turn the key to the ACC position and press the brake at the same time, and the relay will be energized to connect the power cord of the disconnected starter motor to successfully start the car. The use of relay power to play the role of switch, can be in many ways, can also cut off oil, etc.

All anti-theft alarms, including keyless one-button start intelligent system interruption, oil and power cut-off and other functions, are based on the principle of relays. Hope it helps. The starter motor is a 12V40A 5-foot automotive relay.

The relay only needs a small current when it works, 40 A refers to the maximum current that its internal switch bears, and a large current is required when the motor is started, and the relay used for oil cut-off can be very small.

He is the anti-theft host that controls the ignition computer he supplies and the switching relay that powers off.

I advise you not to use that thing, it's easy to go wrong, and suddenly the power will automatically turn off, and you will go crazy.

If there is no entry into the anti-theft relay, it is connected. Entering the anti-theft relay is to disconnect it as simple as that.

The principle of automobile relay is that the normally open circuit is made inside by supplying electricity: when a certain voltage or current is added to both ends of the electromagnetic relay coil, the magnetic flux generated by the coil passes through the magnetic circuit composed of the core, yoke, armature and magnetic circuit working air gap, and under the action of the magnetic field, the armature is attracted to the core pole surface, thereby promoting the normally closed contact to be disconnected and the normally open contact closed; When the voltage or current at both ends of the coil is less than a certain value, when the mechanical reaction force is greater than the electromagnetic attraction, the armature returns to the initial state, the normally open contact is disconnected, and the normally closed contact is connected.

I am glad to know, today in order to introduce the knowledge related to automotive relays, through the following knowledge, you can better understand the relevant knowledge, and I also hope to read the relevant content and enrich your knowledge treasure house.

Relay is an automatic control device that changes by leaps and bounds when the input quantity (electrical, magnetic, sound, light, heat) reaches a certain value. The automotive relay is a relay used in automobiles, which has high switching load power and high impact and vibration resistance. The power supply in the car is mostly 12V, and the coil voltage is mostly designed to be 12V

His working principle is: when a certain voltage or current is added to both ends of the electromagnetic relay coil, the magnetic flux generated by the coil passes through the magnetic circuit composed of the core, yoke, armature and magnetic circuit working air gap, and under the action of the magnetic field, the armature is attracted to the core pole surface, so as to promote the normally closed contact to be disconnected and the normally open contact closed; When the voltage or current at both ends of the coil is less than a certain value, the mechanical reaction force is greater than the electromagnetic attraction, and the armature returns.

In the initial state, the normally open contact is disconnected and the normally closed contact is turned on. Installation method of relay; 1. Installation direction.

If the installation direction is the same as the direction of the relay's impact resistance, the performance of the relay can be fully utilized. It is recommended to make the direction of the impact droop.

Directly in the direction of movement of the contact and armature, the vibration and shock resistance of the normally closed contact in the non-excited state can be effectively improved. When installing, the contact of the relay is axially parallel to the ground, which can avoid contact splashes and carbonization falling on the contact surface and improve the contact reliability. Multi-group relays should avoid small load contacts being located below large load contacts. 2. Close installation.

When multiple relays are installed in close proximity, it will cause abnormal heating, and a 2mm pitch is generally recommended. Installed in close proximity with polarity or magnetism.

The holding relay affects the operating voltage. 3. The shell is installed with a relay, and the shell cannot be removed to install it first, in order to prevent loosening, damage, and deformation, please use a spring washer. Tighten the torque, please.

range. 4. The insertion strength of the plug-in relay is recommended to be 40 70N[1]

5. Products that meet the same load requirements have different dimensions, and products with low height or small installation area can be selected according to the allowable installation space. 6. The installation methods of automotive relays include PCB plate type, ISO socket installation type, and ISO

280 socket mounted and enclosure fixed, card.

Installation method. For relays that are small in size and not often replaced, PCB board type is generally selected, and socket installation method is used for relays that are frequently replaced. For the relay with the main circuit current exceeding 20A, the socket quick-connect type is generally selected to prevent it from being large.

The current passes through the circuit board, causing the circuit board to heat up and damage (except for short-term working relays). It is possible to a bulky relay.

The shell mounting type is selected to prevent damage to the mounting feet under shock and vibration conditions.

The above content is the relevant knowledge explained, which can be understood in more depth. In addition, not only automobiles, but also relays used in all equipment play three roles: first, the role of switches; second, it is the protection effect of load overload and power failure; Third, it is fault power-off protection.

Automotive relays are composed of magnetic circuit systems, contact systems and recovery mechanisms, as indispensable circuit components, such as control relays in automotive lights, air conditioners, electric seats, electric doors and windows, ABS devices, etc.

Let's learn about the working principle and function of automotive relays.

The electromagnetic relay uses the principle of electromagnetic induction, when the coil passes through the direct current, the coil generates a magnetic field, and the moving iron is sucked to drive the contact reed, so that the static contact is separated and the moving contact is closed. When the solenoid coil current is cut off, the iron core loses its magnetism, the moving iron core is reset under the action of spring force, the moving contact is opened, and the static contact is closed.

The contact of the relay coil in the open position when it is not energized is the normally open contact, and the contact in the connected position is the normally closed contact. In the middle of a NO contact and a NO contact, there is a moving contact called a changeover contact. In the same relay, one or more NO contacts, NC contacts and changeover contacts can be used.

There is generally only one coil in an electromagnetic relay. In order to clearly and easily represent the relay on the circuit, the relay coil and the contacts belonging to it are usually represented by a text symbol, and each group of contacts is marked with a corner.

The role of automotive relays.

By controlling the current of the low-voltage line, the current of the high-voltage line is controlled, and the current switch is played, and the main role in the car is to start the motor rotation in a small current control and large current mode, so as to drive the magneto rotor inside the generator to rotate, and input the ignition pulse signal to the igniter, so that the igniter produces an electric spark, ignites the mixed gas in the cylinder and does work.

Relays belong to the switch class, which uses electromagnetic principles and electromechanical principles to close or disconnect contacts to drive or control related circuits.

The relay is a kind of control device, which has two parts: a controlled system (input loop) and a control system (output loop). When the input quantity (electrical, magnetic, optical, thermal and other physical quantities) reaches a certain value, the output quantity changes from zero to a certain value (or jumps from a certain value to zero), so as to achieve the purpose of control, protection, regulation and information transmission of the circuit.

First, find out which 2 of the 4 pins of the relay are coils, and which 2 contacts are connected according to the diagram. The two pins that are insulated are normally open contacts 3 and 4. The other 2 pins are coils 1 and 2 How they work:

The working principle of the automotive relay is that the coil is energized to generate a magnetic field, and then the iron sheet connected to the contact is sucked in, so that the circuit path can achieve the purpose of protecting the circuit. The general connection method is that the two wires of the coil are one positive and one negative, and one end is connected to the switch. The rest of the wires are connected to the electrical appliances.

The relay ground seat is printed on the four feet to represent the coil foot to indicate the contact pin to produce magnetism when energized, so that the contact of the foot is engaged, so as to achieve the working state, and the yuan then electrical appliance believes that the pin is connected to the control line and the pin is connected to the working line The pin can be in positive and negative order. 87A normally closed contact, generally not commonly used, his function is to energize the relay coil and disconnect.

Automotive relays.

Then, the automotive relay can be regarded as a combination of two parts: the control circuit working by the coil and the main circuit working by the contact. In the control circuit of the relay, there is only a small working current, which is due to the small contact capacity of the control switch, which cannot be used to directly control the load with large power consumption, and can only control its on/off through the contact of the relay.

A relay is both a control switch and a control object (actuator). Take the fuel pump relay as an example, it is the control switch of the fuel pump, but the coil of the fuel pump relay can only form a loop through the grounding point of the electronic control unit when the triode is turned on in the electronic control unit.

A relay is a switching device that is controlled with an electric current. It is an indispensable actuator in various automatic control circuits. It is a kind of power equipment, which is often used in automatic control circuits, and can control the conduction and cut-off of large currents with a small current, so as to play the role of automatic control.

The role of the relay is mainly amplified, with a very small current, you can control the circuit of a very large power, but also expand the control range, when the signal reaches a certain value, you can press the different forms of the contact group, at the same time change, break, turn on multiple circuits, to achieve the purpose of automatic switching.

A relay is a switching device that is controlled with an electric current. It is an indispensable actuator in various automatic control circuits. Relay (English name:

Relay is an electrical control device, which is an electrical appliance that makes a predetermined step change of the controlled quantity in the electrical output circuit when the change of the input quantity (excitation quantity) reaches the specified requirements. It has an interactive relationship between the control system (also known as the input loop) and the controlled system (also known as the output loop). Usually used in the control circuit of automation, it is actually a kind of "automatic switch" that uses a small current to control the operation of a large current.

Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit.

Hello, I'll put it in layman's terms!

The relay is mainly divided into two parts: coil and contact, of which the contact is divided into normally open contact and normally closed contact (some relays only have normally open contact).

When the rated working voltage is added to the coil, the contact is immediately activated, that is, the normally open contact becomes normally closed contact, and the normally closed contact becomes normally open contact.

When the relay coil is de-energized, the contacts are immediately reset to their initial state.

To put it simply, a relay is an automatic switch.

You have to see ** to judge accurately.

Generally, there are 4 pins, two are coils, and the other two are switches, power on the two pins of the coil, and the two pins of the switch will be closed and connected; When the coil is de-energized, the switch is disconnected.

Most cars can find the trace of the relay as long as they lift the engine cover to find the relay installation box. Control relays are used for automotive lights, wipers, starters, air conditioners, power seats, electric doors and windows, anti-lock braking devices, suspension controls, audio, etc. There are two main parts of the control relay, one is the control system and the other is the controlled system.

The reason why the control relay can play a control role is because when a certain signal is input into its control system, such as electricity, magnetism, heat, light and other physical quantities, it can make the controlled quantity of the control system (also known as the output loop) mutate from zero to a fixed value, or from a certain value to zero, so as to achieve control, protection, transmission and conversion of information. Controlling a large current with a small current is the characteristic of the control relay. The technology of automotive control relay is demanding, because it has to adapt to vibration, high temperature, low temperature, humidity and oil, salt, water and other aggressive harsh environments, requiring long life, high reliability, small size, low consumption, and at the same time has electromagnetic compatibility, flame retardancy, fast response and other properties.

It can really be said that it is to ask the horse to run, and to ask the horse not to eat grass. As an automotive control relay, it must meet these requirements. Taking the commonly used automotive light control relay as an example, there are mainly three-pin, four-pin and five-pin control relays.

Respectively control headlights, headlights and instrument lights, cornering lights, rear lights, brake lights, reverse lights, fog lights, cabin lighting, etc. When the combination switch is turned to the ON gear of the headlight, the control system of the headlight relay (the magnetic field coil part) will be energized to generate a magnetic field, and the alloy contact will be closed immediately, and the current of the control system will be turned on, so as to control the opening of the headlight. When the combination switch is turned to the headlight OFF to disconnect the power supply, the magnetic field disappears so that the control alloy contacts are immediately separated, and the current of the control system is cut off, and the headlights are turned off.

At present, automotive control relays are still mainly mechanical, but they are developing towards solid-state relays. The key to relays is reliability, because if the relay fails, it will immediately cause the function of the system components to be paralyzed, and even the entire car will not be able to move. For example, if the starter relay fails, the car will not be able to start electrically, although the starter relay will cost a dozen yuan at most, but without it, the car will be inconvenient to run.

There are two main categories of domestic automotive control relays according to the classification of vehicles in use, one is the imitation European car relay, which is mainly used for the introduction of technology vehicles from Germany and France, and the other is the imitation of Japanese car relays, which are mainly used for Japanese models. In the international market, the well-known manufacturer of automotive control relays is Bosch of Germany.