After learning these car knowledge, you will be a real experienced driver!
What is the maximum wading depth?
Of course it refers to the maximum depth that a car can wade into. In other words, cars cannot pass if the water depth is higher than this.
How to perform emergency operations when steering is out of control?
Release the accelerator pedal immediately.
When the vehicle speed is high, emergency braking cannot be used to reduce the vehicle speed.
Shift into overdrive and use engine braking to slow down.
Use the parking brake (commonly known as the handbrake).
Turn on the hazard warning lights as soon as possible.
Try to choose a safe place to park and place a warning sign behind the car.
What are the driving methods of cars?
According to the different engine positions and drive wheels, there are 5 most common driving methods of cars, including the front-wheel drive, which is most commonly used in small cars. Engine front-wheel drive (FF), front-engine rear-wheel drive (FR) found on luxury cars, mid-engine rear-wheel drive (MR) seen on high-performance sports cars, and rear-engine rear-wheel drive (RR) , and four-wheel drive (4WD) used on SUVs and high-performance sedans.
How to read the coolant temperature gauge?
Generally speaking, the engine water temperature gauge is displayed by a physical or virtual dial pointer, but a few vehicles do not have an instrument panel and only appear when the temperature is too high. warning sign. Whether it is a physical or virtual water temperature meter, the pointer position is basically the same, usually marked with a 60 ℃ --120 ℃ dial or Cold (C) -- Hot (H).
What is a road departure warning system?
When a driver is sleepy, it is easy to cross the center line of the road and drive in the wrong direction, which is why many accidents occur. The road departure warning system detects the geometric characteristics of the road boundary or the road centerline, and uses the lane departure evaluation algorithm to evaluate the possibility of lane departure. When it thinks that you have crossed the road centerline abnormally, it will remind the driver to pay attention. The reminder methods of different brands of models are different. For example, BMW uses a slight vibration of the steering wheel, and Citro?n uses a slight vibration of the driver's seat.
Why do some cars have to press the gear lever before the reverse gear can be engaged?
When driving a manual transmission car, if the car suddenly shifts into reverse gear by mistake while driving at a higher speed, gear, it may damage the transmission or even the engine. Therefore, in order to prevent this kind of phenomenon from happening, some cars have to press the gear lever down to shift into reverse gear, while some cars have to lift the buckle at the lower end of the gear lever before shifting into reverse gear.
What is EBA?
EBA is the abbreviation of Electronic Brake Assist. The Chinese name is Electronic Emergency Brake Emergency Brake Assist System, also known as BA. In some very urgent events, drivers often cannot press the brake pedal quickly, and EBA is designed for this purpose. When EBA detects that the driver depresses the brake pedal quickly and vigorously, it will consider it a sudden emergency and immediately and automatically provide greater braking pressure to increase the braking effect. Not only that, but the speed of applying pressure will also increase. Much faster than the driver, which can greatly shorten the braking distance and enhance safety. Especially for women and elderly drivers with very poor foot strength, it is very helpful when braking to avoid emergency dangers.
Why does a car have toe-in?
There are three main purposes of letting the car's wheels have toe-in:
It can cooperate with the camber angle to make the steering flexible , Reduce tire wear.
It can make the car go straight and enhance driving stability.
Can reduce fuel consumption.
Does the parking brake brake four wheels?
Car parking brakes can be divided into central braking type and wheel braking type. The central braking type is usually installed behind the transmission or transfer case (four-wheel drive vehicle), and its braking torque acts on the drive shaft; most wheel braking types directly act on the rear wheel hub of the car, and the types can be divided into drum type,
Disc type, belt type and spring action type. It brakes only the two rear wheels.
It is for this reason that in order to only allow the two rear wheels to slide when doing drifting, drivers often pull the parking brake handle, which means that the two rear wheels stop rotating.
What is a chassis?
The automobile chassis should include transmission, transmission, suspension, shock absorbers, axles, steering, brakes, wheels, etc. Some people think that the thing on the bottom of the car is the chassis. It can also be understood this way, but some components of the chassis are not necessarily at the bottom, such as the steering system.
Why are automatic transmission cars more expensive than manual transmission cars?
Automatic transmission cars have higher technical content. Compared with manual transmission, automatic transmission contains more advanced technologies and patents. So far, our country cannot truly master the core technology of automatic transmission. Manual transmission technology is relatively simple, and there is no longer any issue of technical confidentiality.
Automatic transmissions have higher manufacturing process requirements and higher manufacturing costs.
Why is the coolant temperature higher when idling?
Under normal circumstances, the engine coolant temperature is higher when idling. Because when the car is running, wind enters the engine room, and the natural wind can be used to blow away the heat on the radiator, so that the coolant can be cooled and the coolant temperature can naturally drop. In addition, when driving, the engine speed increases, which is more conducive to coolant circulation, thereby lowering the coolant temperature.
How to adjust the seat headrest?
There is a small button on the extension rod of the headrest, which is the headrest position locking button. To raise the headrest, simply pull it up to the desired position. To lower the head restraint, you should first press the head restraint position lock button and push the head restraint downward at the same time (some head restraints need to press the lock button when adjusting both high and low). When the driver's ears and the center line of the head restraint are on a horizontal line, the height of the head restraint is more appropriate.
What does the mark on the steering wheel mean?
SRS is the symbol of a car airbag, indicating that an airbag device is installed in the center of the steering wheel. SRS is the English abbreviation of Supplemental Restraint System (generally referred to as airbag). The full name is Supplemental Restraint System, which means "auxiliary restraint system". In fact, the SRS logo can also be found in other locations, as long as that location is equipped with airbags or curtain airbags.
Why are there small metal blocks on the wheels?
This small metal block is called a balance weight, also known as a tire balance weight. It is a counterweight component installed on the wheel of the vehicle. The function of the balance weight is to maintain dynamic balance of the wheel under high-speed rotation.
The mass of each part of any object will be different. Under static and low-speed rotation, uneven mass will affect the stability of the object's rotation. The higher the rotation speed, the greater the vibration. The function of the balance weight is to minimize the mass gap of the wheel to achieve a relatively balanced state.
What is a non-load-bearing body and a load-bearing body?
Non-load-bearing type: A car with a non-load-bearing body has a rigid frame, also called a chassis girder frame. The body body is suspended on the frame and connected with elastic elements. The vibration of the frame is transmitted to the body through elastic elements, and most of the vibration is weakened or eliminated. When a collision occurs, the frame can absorb most of the impact force and protect the body when driving on bad roads. Therefore, the cabin deforms little and is stable. It has good performance and safety, and the noise inside the cabin is low. However, this non-load-bearing body is relatively bulky and massive, with a high center of mass and poor high-speed driving stability.
Bear-bearing type: A car with a load-bearing body does not have a rigid frame, but only strengthens the front, side panels, rear, floor and other parts. The body and the chassis together form the rigid space of the body. structure. In addition to its inherent passenger function, this type of load-bearing body also directly bears various loads. This form of body has greater anti-bending and anti-torsion stiffness, small mass, low height, low center of mass of the car, simple assembly, and good high-speed driving stability. However, since the road load is directly transmitted to the body through the suspension device, the noise and vibration are relatively large.
What is the function of the flywheel?
The flying wheel, a disc-shaped part with a large moment of inertia, functions like an energy storage. For a four-stroke engine, every four strokes Each piston stroke does work once, that is, only the power stroke does work, and the three strokes of exhaust, intake and compression all consume work. Therefore, the torque output by the crankshaft changes periodically, and the crankshaft speed is also unstable. In order to improve this situation, a flywheel is installed at the rear end of the crankshaft.