What is the maximum wading depth?
Of course, it refers to the maximum depth that a car can wade. In other words, if it is higher than this water depth, cars can't pass.
How to deal with an emergency when the steering is out of control?
Release the accelerator pedal immediately.
When the vehicle speed is high, emergency braking is not allowed to reduce the vehicle speed.
Grab the gear and use the engine brake to slow down.
Use the parking brake (commonly known as the hand brake) together.
Turn on the danger warning light at the first time.
Try to park in a safe place and put warning signs behind the car.
What are the driving modes of cars?
According to the different engine positions and driving wheels, there are five common driving modes for automobiles, namely, front engine front wheel drive (FF) commonly used in small cars, front engine rear wheel drive (FR) used in luxury cars, middle engine rear wheel drive (MR) and rear engine rear wheel drive (RR) seen in high-performance sports cars, and four-wheel drive (4WD) used in SUVs and high-performance cars.
How to read the coolant thermometer?
Generally speaking, the engine water thermometer is displayed by physical or virtual dial hands, while a few vehicles do not have instrument panels, and warning signs will only appear when the temperature is too high. Whether it is a physical or a virtual water thermometer, its pointer is basically similar, and it is generally marked with a dial of 60℃- 120℃ or cold (c)- hot (h).
What is the road departure warning system?
When drivers are sleepy, it is easy to cross the road center line and go backwards, which is also the reason for many accidents. The road departure warning system evaluates the possibility of lane departure by detecting the geometric characteristics of the road boundary or road centerline. When you think you have crossed the road centerline abnormally, it will remind the driver. Different brands have different ways of reminding, such as BMW microseismic steering wheel and Citroen microseismic driver's seat.
Why do some cars have to press the shift lever to change gears?
When driving manual gear, if the car suddenly goes into reverse gear at high speed, it may damage the transmission and even the engine. Therefore, in order to prevent this phenomenon, some cars have to press the gear lever to enter the reverse gear, and some cars have to lift the buckle at the lower end of the gear lever to enter the reverse gear.
What is EBA?
EBA(Electronic Brake Assist) is the abbreviation of Electronic Emergency Braking Assist, whose Chinese name is Electronic Emergency Braking Emergency Braking Assist System, also known as BA. In some very urgent events, drivers often can't press the brake pedal quickly, and EBA is designed for this purpose. When EBA finds that the driver presses the brake pedal quickly and forcefully, it will think that it is a sudden emergency, and immediately provide greater braking pressure automatically, which not only increases the braking effect, but also applies pressure much faster than the driver, which can greatly shorten the braking distance and enhance safety. Especially for women with poor feet and elderly drivers, it is very helpful to avoid emergency and dangerous braking.
Why does a car have a toe-in?
The wheel adduction has three main purposes:
It can cooperate with camber angle to make steering flexible and reduce tire wear.
It can make the car go straight and enhance the driving stability.
Can reduce fuel consumption.
Does the parking brake brake four wheels?
Automobile 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), and its braking torque acts on the transmission shaft; Most wheel brakes act directly on the rear wheel hub of the car, and their types can be divided into drum type,
Disc, belt and spring action. It only brakes two rear wheels. It is precisely for this reason that drivers often pull the handle of the parking brake in order to make the two rear wheels only slide, that is, stop the rotation of the two rear wheels.
What is a chassis?
Automobile chassis should include transmission, transmission, suspension, shock absorber, axle, steering, braking, wheels, etc. Some people think that under the car is the chassis. You can understand this, but some parts of the chassis are not necessarily at the bottom, such as the steering system.
Why is automatic gear more expensive than manual gear?
Automatic transmission technology is very high. Compared with manual transmission, automatic transmission contains more advanced technologies and patents, which can't be regarded as the core technology of automatic transmission in China. Manual transmission technology is relatively simple, and there is no technical confidentiality problem.
Automatic transmission needs higher manufacturing process and higher manufacturing cost.
Why is the coolant temperature higher when idling?
Under normal circumstances, the engine coolant temperature is high at idle speed. Because the wind enters the engine room when the car is running, the heat on the radiator can be blown away by the natural wind, so that the coolant is cooled and the temperature of the coolant naturally drops. In addition, when driving, the engine speed increases, which is more conducive to the circulation of coolant, thus reducing the temperature of coolant.
How to adjust the seat headrest?
There is a small button at the extension bar of the headrest, which is the headrest position lock button. When raising the headrest, just pull it to the ideal position. If you want to adjust the headrest, first press the headrest position lock button and push the headrest down at the same time (some headrests need to press the lock button when they are raised or lowered). When the driver's ears and the center line of the headrest are on a horizontal line, the height of the headrest is more appropriate.
What does it mean on the steering wheel?
SRS is the symbol of automobile airbag, indicating that the airbag device is installed in the center of the steering wheel. SRS is the abbreviation of auxiliary protection system (generally referred to as airbag), and its full name is auxiliary restraint system, which means "auxiliary protection system". In fact, SRS signs can also be found in other locations, as long as the location is equipped with airbags or airbags.
Why is there a small metal block on the wheel?
This small metal block is called balance block, also called tire balance block. It is a counterweight component installed on the wheel of a vehicle. The function of counterweight is to keep the wheels in dynamic balance under high-speed rotation.
The mass of every part of any object is different. In the case of static and low-speed rotation, uneven mass will affect the stability of object rotation. The higher the rotating speed, the greater the vibration. The function of the counterweight is to reduce the mass gap of the wheel as much as possible and achieve a relatively balanced state.
What is a non-loaded body and a loaded body?
Non-load-bearing: A car with a non-load-bearing body has a rigid frame, which is also called chassis girder frame. The car body is suspended on the frame and connected by elastic elements. The vibration of the frame is transmitted to the car body through the 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 car has small deformation, good stability and safety, and low noise inside the car. However, this kind of non-load-bearing car body has large volume, heavy weight, high center of mass and poor stability at high speed.
Load-bearing: A load-bearing car has no rigid frame, but only the front, side wall, rear and floor are strengthened. The body and underframe together form a rigid spatial structure of the body. In addition to the inherent load-bearing function, this kind of load-bearing body also directly bears various loads. This kind of car body has the advantages of large bending and torsion stiffness, small mass, low height, low center of mass, simple assembly and good high-speed driving stability. However, because the road load will be directly transmitted to the car body through the suspension device, the noise and vibration are large.
What is the function of flywheel?
Flywheel is a disk-shaped component with great moment of inertia, which plays the role of energy storage. For a four-stroke engine, work is done every four piston strokes, that is, only work is done in the stroke, and work is consumed in the three strokes of exhaust, intake and compression. Therefore, the output torque of the crankshaft changes periodically, and the speed of the crankshaft is also unstable. In order to improve this situation, a flywheel is installed at the rear end of the crankshaft.