How Does a Seat Belt Work?

1 Answers
OJosie
07/30/25 4:18am
Seat belt working principle is: Under normal circumstances, passengers can freely and evenly pull the webbing on the seat, but when the webbing is continuously pulled out from the retractor and suddenly stops or when the vehicle encounters an emergency, the ratchet mechanism will engage and automatically lock the webbing, preventing it from being pulled out further. The car seat belt is a device used in vehicles to reduce passenger injuries when the car body is subjected to a violent impact. The ideal functioning process of a seat belt is: first, it tightens promptly, firmly holding the person in the seat without hesitation at the first moment of an accident; then, it moderately loosens, appropriately relaxing the seat belt after the peak impact force has passed or when the person can be protected by the airbag, to avoid rib injuries caused by excessive tension.
Was this review help?
1
5
Share
More Forum Discussions

Does an oil change reminder indicate the need for maintenance?

Check whether the maintenance mileage or time has been reached, and change the oil immediately if so. Engine oil serves functions such as lubrication, cleaning, cooling, sealing, wear reduction, rust prevention, and corrosion protection for the engine. The engine is the heart of a car, containing many metal surfaces that move against each other. These components operate at high speeds in harsh environments, with working temperatures reaching 400°C to 600°C. Under such severe conditions, only qualified lubricating oil can reduce engine component wear and extend service life. Below are relevant details about oil changes for new car maintenance: 1. Oil change intervals: Generally, considering domestic fuel quality, it is appropriate to change the oil around 8,000 kilometers. However, this interval does not apply to all situations. Different oil qualities and varying road conditions can affect the change interval. Fully synthetic oil has the longest service life and can typically be changed around 10,000 kilometers. Semi-synthetic oil can be changed at 8,000 kilometers, while conventional mineral oil should be changed earlier. 2. Factors influencing oil change intervals: If frequently driving in congested areas, the engine operates in a harsh environment, increasing the oil's cleaning workload. In such cases, the oil change interval may need to be shortened. When changing the oil, remember to replace the oil filter as well, as a poor-quality filter may affect the oil's performance.
12
2
Share

What is the Difference Between 48V Mild Hybrid and Full Hybrid?

Mild hybrid and full hybrid vehicles differ in their working principles, resulting in varying fuel consumption. Below are their specific differences: 1. 48V Mild Hybrid: Also known as MHEV, the most common 48V mild hybrid system quadruples the standard 12V voltage to easily power higher-capacity onboard electrical equipment. This allows high-power components like the power steering, starter motor, and air conditioning to remain operational even when the engine is off. The 48V system also better optimizes engine start-stop, braking, and acceleration, directly impacting fuel efficiency and emissions. However, strictly speaking, the 48V mild hybrid system isn't a true hybrid but rather an electrification upgrade for conventional fuel vehicles. 2. Full Hybrid: This system adds one or more electric motors to the internal combustion engine, not only assisting the engine to deliver stronger power but also enabling pure electric driving under low-speed or steady-state conditions. Particularly in congested urban environments, full hybrids demonstrate significant fuel-saving advantages. However, they come with higher upfront costs - hybrid versions typically cost 20,000-30,000 RMB more than their gasoline counterparts for the same model. When calculated, this additional purchase cost roughly equals the long-term fuel savings compared to conventional vehicles.
17
4
Share

Where is the fuel tank cover button on Volkswagen?

Volkswagen fuel tank cover button is located on the left side below the steering wheel on the dashboard. From left to right, the first handle is the trunk control button, and the second handle is the fuel tank cover control button. Volkswagen models include: Lavida, Lamando, Passat, Sagitar, Golf, etc. Taking the Golf 2021 model as an example, its body dimensions are: length 4296mm, width 1788mm, height 1471mm, wheelbase 2636mm, fuel tank capacity 51L, and trunk capacity 380L. The Golf 2021 model is equipped with a 1.2T turbocharged engine, with a maximum power of 85kw and a maximum torque of 200nm.
7
3
Share

Which model is the BMW 3 Series Long Wheelbase?

BMW 3 Series Long Wheelbase is the BMW 3 Series Li. Taking the BMW 3 Series 2021 320Li M Sport Package as an example, it is a 4-door, 5-seater sedan with body dimensions of: length 4829 mm, width 1827 mm, height 1463 mm, wheelbase of 2961 mm, and a fuel tank capacity of 59 liters. The BMW 3 Series 2021 320Li M Sport Package is equipped with a 2.0T turbocharged engine, with a maximum power of 115 kW and a maximum power speed of 4500 to 6500 rpm, paired with an 8-speed automatic manual transmission.
10
5
Share

Who Are the 6 Major Investors Behind NIO?

NIO's 6 major investors are Li Bin, Richard Liu (Liu Qiangdong), Li Xiang, Pony Ma (Ma Huateng), Lei Jun, and Zhang Lei. NIO's vehicle models: 1. NIO ES6: The ES6 adopts a high-strength aluminum and carbon fiber composite structure, featuring a 0-100 km/h acceleration time of 4.7 seconds, a comprehensive range of 510 km under standard conditions, and a braking distance of 33.9 meters. The ES6 continues NIO's family design language with a stylish and sporty exterior and a refined, tech-savvy interior. 2. NIO EC6: The EC6 features a coupe-style body design with a drag coefficient as low as 0.27Cd. Its integrated panoramic glass roof covers an area of 2.1 square meters. The EC6 Performance Edition is equipped with a front 160 kW permanent magnet motor and a 240 kW induction motor, achieving a 0-100 km/h acceleration time of just 4.7 seconds. With a 100 kWh liquid-cooled battery pack, the EC6 Performance Edition offers an NEDC range of 615 km. 3. NIO EP9: The EP9 is powered by four high-performance motors and four independent gearboxes, delivering a robust output of 1,360 horsepower. It accelerates from 0 to 200 km/h in 7.1 seconds and has a top speed of 313 km/h. The EP9 features a magazine-style swappable battery system, with a fast-charging time of just 45 minutes and a range of up to 427 km.
18
1
Share

How to Turn on the Headlights of a Chevrolet Sedan?

To turn on the headlights of a Chevrolet sedan, follow these steps: 1. The low beam and fog lights of a Chevrolet can be activated using the light control knob located near the driver's legs. Turn it once to the right to turn on the fog lights and twice to activate the low beams. 2. To turn on the high beams, first activate the low beams, then push the lever on the left side of the steering wheel toward the instrument panel. Note: The headlight switch is generally integrated into the lever-style switch on the left side of the steering wheel, while some models may feature a rotary knob-style switch. Simply turn or push the switch to the designated position to illuminate the corresponding exterior lights, and the corresponding indicator will also light up on the instrument panel.
5
3
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.