What is the function of the car self cherishing system?

Generally, cars equipped with microprocessor control units have fault self-diagnosis systems. It can be used to automatically check and monitor the working status of each part of the transmission system and control system in the car. When the car breaks down, the fault indicator mounted on the dashboard flashes to warn the owner that there may be a problem with the car, and the fault** is displayed on the dashboard at the push of a button.

Diagnosing the car's power system, body system, chassis system, signal system, air intake system, etc., Kuchebao can help you complete this job very well, real-time feedback to your mobile phone receiver, you don't need to know the fault ** to know what is wrong with your car.

The fault component is saved in the form of a fault code, which is easy for the diagnosticator to read out and quickly find, and the fault warning light is lit to remind the driver that the EFI system is faulty.

To be honest, this thing has, but it is some obsolete cars or professional auto mechanics, that is also stolen information, those things are trade secrets, you can find small problems on the Internet, who still goes to 4s, and, some of the shows are different from the actual ones, like Nissan car remote lock door, but the key will ring, in fact, it is the operation error of the computer, as long as the insurance is pulled down for a few minutes, but to use self-diagnosis, it is said that it is a ship, not the same at all.

It is to check yourself before the vehicle is run to see if there is a fault, so as not to affect the safe driving.

Where to diagnose, detect and prevent car breakdowns.

Automobiles are mainly composed of engine, chassis, body, and electrical and electronic equipment.

The engine is composed of five major systems and two major mechanisms, namely the crank connecting rod mechanism, the valve mechanism, the supply system, the cooling system, the lubrication system, the ignition system and the starting system.

The chassis is composed of transmission, driving, steering, braking and other systems.

Let's briefly talk about the role of each system:

Transmission: Transmit the ground power output of the engine to the driving wheels to make the vehicle move forward.

Driving: Supporting the quality of the whole vehicle, transmitting and bearing the vibration from the road surface, etc.

Steering: It is car steering.

Braking: It is the car that slows down or stops.

A lot, depending on what you think.

Powertrain (engine, transmission).

Undercarriage (suspension, frame, etc.).

Travel system (wheels).

Electrical appliances (air conditioning, sound, lighting, etc.).

Five engine systems: cooling system, fuel supply system, lubrication system. , ignition system, starting system.

four major systems of the chassis; Transmission system, automatic system, steering system, driving system.

Automotive systems are divided into four main categories:

1. Mechanical transmission DU system.

The mechanical drive train has a simple structure and reliable operation, and is widely used in various types of automobiles. Its basic composition and working principle: the power of the engine is transmitted to the driving wheel behind by clutch 1, transmission 2, universal joint 3, transmission shaft 8, final reducer 7, differential 5, half shaft 6.

And cooperate with the engine to ensure that the car can run normally under different conditions. In order to adapt to the different requirements of automobile driving, the drive train should have specific functions such as deceleration and torque, speed change, reversing the car, interrupting power transmission, and making the driving wheels on both sides rotate differential.

2. Hydraulic drive system.

Hydraulic drive trains use a combination of hydraulic and mechanical power to transmit power. In automobiles, hydraulic transmission generally refers to hydraulic transmission, that is, using liquid as the transmission medium, using the change of kinetic energy in the process of circulating flow between the active element and the driven element to transmit power. There are two types of dynamic and hydraulic transmission devices: fluid coupling and hydraulic torque converter.

The fluid coupling can only transmit torque, but cannot change the magnitude of the torque, and can replace part of the function of the clutch, that is, to ensure the smooth start and acceleration of the car, but not to ensure that the gears in the transmission are not impacted when changing gears. In addition to the full function of the fluid coupling, the torque converter can also achieve stepless speed change, so it is much more widely used than the fluid coupling.

3. Hydrostatic drive train.

Hydrostatic drive train is also known as positive displacement hydraulic drive train. It is mainly composed of oil pumps, hydraulic motors and control devices. The mechanical energy of the engine is converted into hydraulic energy by the oil pump, and then converted into mechanical energy by the hydraulic motor.

In the diagram scheme, only one motor is used to transmit power to the drive axle final reducer, and then to the drive wheels through the differential and half shaft.

Another option is to install a motor on each drive wheel. When the latter scheme is adopted, the mechanical transmission parts such as the final reducer, differential and half shaft can cancel the hydrostatic drive train, because of the low mechanical efficiency, high cost, service life and reliability are not ideal, so it is only used on some military vehicles.

4. Electric drive train.

The electric drive train is mainly composed of an engine-driven generator 2, a rectifier 3, an inverter device (a device that converts direct current into alternating current with variable frequency), and an electric wheel (a driving wheel equipped with a traction motor and a reducer inside). The performance of the electric drivetrain is similar to that of the hydrostatic drivetrain, but the motor mass is much larger than that of the oil pump and hydraulic motor, so it is limited to the application of ultra-heavy vehicles.

There are five major engine systems: fuel supply system, lubrication system, cooling system, ignition system, and starting system.

Hello, are you referring to the five major systems of the car, or the five major systems of the engine? If it is the system of the car, it is divided into engine system, chassis system, body electrical system, body skeleton system, and body interior.

If it is the five major systems of the engine.

Ignition system, cooling system, starting system, fuel supply system, near exhaust system.

The five major systems of automobile chassis are divided into: steering system, braking system, starting system, driving system, and transmission system.

1 minute to see the five major systems of the car: engine, brakes, clutch, gearbox, transmission.

The data communication module DCM is a network communication function module used in automobiles