What devices are hidden in cars that are difficult to find but useful? What devices are useful and efficient in the car but difficult to spot?
Today's automobiles are solid high-tech products and the pearl of modern industry. The level of development of a country's automobile industry reflects the industrial level of the country to a large extent. But we ordinary people, not very sensitive to cars, feel that it is a means of transportation for people, what high-tech is worth touting. In fact, in the car's beautiful leather bag, there is a proud soul wrapped.
We ordinary people look at the car, more important is the appearance, interior, configuration, etc., in fact, every operation you have in the car, such as hanging gear, stepping on the accelerator, stepping on the brakes, turning the steering wheel, etc., there are countless devices running in the car at the same time, giving you the best driving experience, the most faithful execution of your driving intentions. And these devices are hidden in the corners you can't see, silently serving you.
1. Sensor
There are at least hundreds of sensors on the car now, they are the "sentinels" on the car, monitoring the running state of the car at all times, such as speed, engine water temperature, air temperature, speed, load, fuel pressure, camshaft position, transmission oil temperature, car tilt angle, steering wheel angle, brake signals, etc. And these operating states are converted into electrical signals, which are immediately transmitted to each electronic control unit on the car, or displayed on the dashboard to remind the driver to pay attention.
2. Electronic control unit
If the sensor is the "sentinel", the electronic control unit is the "headquarters" of the car, the brain of the car. According to the various signals transmitted by the sensor, the electronic control unit accurately determines the running state of the car and makes the correct control commands, such as acceleration, deceleration, braking, steering, etc. Now there are generally dozens of electronic control units on the car, the simplest also has engines, gearboxes, body, air conditioning, etc., more complex lights, suspension, brakes, steering, audio, etc., some advanced models, almost all the functions on the car are controlled by the electronic control unit.
3. Actuator
There are "sentries", there are "headquarters", and of course there are soldiers who fight, and the actuator is the soldier who performs a specific task. The electronic control unit issues instructions to the actuator, and the actuator faithfully executes the instructions, controls its own movements, and allows the car to accelerate, decelerate, brake, steer, etc. For example, we step on the accelerator pedal, the actuator on the throttle - the motor begins to move, so that the opening angle of the throttle flap increases, so that more air enters the engine, and the car begins to accelerate. Others include camshaft position changes, injector opening time and duration, ignition coil ignition time, transmission gear change, and more.
4. Brake system assist
The driver presses the brakes and the car begins to slow down until it stops. In this simple action, there are actually many devices working at the same time. Press the brake pedal, the brake switch is turned on, the brake light is lit, and the brake signal is transmitted to the electronic control unit; the vacuum assist device begins to work to provide greater braking power to the brake master pump; the ABS pump determines the output braking force according to the pedal force, speed, etc., and according to the speed signal, determine whether the wheel is locked to reduce or increase the braking force; if the steering wheel is also hit while stepping on the brake, the body electronic stability control system will also work to prevent the body from getting out of control, and so on. These actions are carried out without us knowing it, not what we imagined, and the process of pressing the brake pedal and the brake oil directly into the brake sub-pump to generate braking force is much more complicated than this.
5. Steering power system
The driver turns the steering wheel and the car can drive in the direction given by the driver. For older steering systems without power, the steering wheel and steering wheels are connected by a steering machine, and the two act synchronously. Today's cars have a steering power system, while the driver rotates the steering wheel, the power system also begins to work, on the one hand, to reduce the driver's labor intensity, on the other hand, to make the steering more accurate. In particular, the electric steering power device that is now commonly used can adjust the size of the power at any time according to the steering wheel angle, speed, etc., and the steering is safer and more accurate.
6. Carbon tank device
The fuel tank volume of the car is fixed, and the fuel inside is gradually reduced with consumption, and due to changes in temperature, the pressure in the fuel tank also changes at any time. How do you balance the pressure inside and outside the fuel tank? Fuel tank carbon tank systems can solve this problem. In the process of automobile work, the carbon tank system can exchange gas with the outside atmosphere at any time, balance the internal pressure of the fuel tank, absorb fuel vapor, and ensure the supply of engine fuel. It is generally hidden inside the fender and is difficult to find.
7. Three-way catalytic converter and particle trap
Fuel in the combustion chamber, it is generally difficult to burn completely, so the exhaust gas contains a large amount of carbon monoxide, hydrocarbons and particulate matter, etc., which will pollute the atmosphere. In order to degrade these substances, a three-way catalytic converter and particle trap are installed in the exhaust pipe, which can convert the exhaust gas into carbon dioxide and water, and adsorb particulate matter, and the final exhaust gas pollution to the atmosphere is relatively small. This is an important environmental protection device on the car, if it is damaged, the exhaust of the car will not be qualified.
In fact, there are many hidden devices on the car, such as various safety devices (airbags, collapsed steering wheels, collapsed foot pedals, various high-strength steels, etc.), hidden car keys, hidden door locks and so on. What we see is the beautiful appearance of the car, the use of the car is convenient and fast, but what really serves us is a variety of invisible devices. This is like our social structure, we see high-ranking officials and tycoons in the news and television, but in fact, it is thousands of ordinary people who are unknown to serve us.