What is the function of AOFF in a car?

What does a dual-engine car mean?

Dual-engine cars are highly efficient and low-consumption vehicles equipped with two sets of engines—an electric engine and a gasoline engine. Additionally, these cars employ a special system to capture the energy generated during braking and store it in the onboard battery. Below are the functions and advantages of the electric engine: Functions of the electric engine: The electric engine consumes no energy when idle (completely shut off) and uses less energy than the gasoline engine during low-speed driving. On the other hand, the gasoline engine performs better at high speeds, delivering more power for the same engine weight. This means the electric engine is more efficient in stop-and-go traffic during peak hours. Advantages of the electric engine: The primary advantage is that it produces no exhaust emissions, thereby reducing smog pollution levels. Another benefit of the gasoline engine is its ability to recharge the battery while driving. Many electric car owners struggle with the limitations of power cords. The gasoline engine automatically starts and begins charging when the battery level drops, eliminating the need for power cord charging.

7

1

Share

What's the reason for the malfunction of the central control buttons in the Mercedes-Benz E-Class?

Mercedes-Benz E-Class central control button malfunction is recommended to drive directly to the 4S store for repair. Repair methods: It can be repaired at the 4S store or at a professional repair shop. The car's central control screen mainly displays car audio, navigation, vehicle information, reversing images, etc., and includes single-touch LCD screens and multi-touch LCD screens. Functions of the car's central control: The car's central control is the place to control comfort and entertainment devices such as car air conditioning and audio. The car's central control includes the central control door lock system, through which the driver can control the switching of the whole car's doors and the window lifting system. The central control door lock system mainly has three functions: central control, speed control, and individual control. The driver can control all door lock switches. At the same time, when the driving speed reaches a certain level, the doors automatically lock. For other doors, there are independent switches that can individually control their own doors.

18

5

Share

What is the Principle of the Handbrake?

The working principle of the handbrake mainly involves the friction clamping between the brake shoe and the brake drum or between the friction plate and the brake disc to achieve parking. Here is some information about the handbrake: 1. The professional term for the handbrake is the auxiliary brake. Unlike the principle of the main brake, it uses a steel wire cable connected to the rear brake shoe to brake the vehicle. 2. Long-term use of the handbrake can cause the steel wire to undergo plastic deformation. Since this deformation is irreversible, prolonged use will reduce its effectiveness, and the handbrake's travel distance will also increase. Additional Information: For small cars, some handbrakes are located behind the transmission, where there is a brake disc connected to the drive shaft, similar to a disc brake. The pulling force is transmitted there through a steel cable to achieve parking braking. After pulling the handbrake, it uses a hydraulic auxiliary cylinder to push the main hydraulic cylinder under the car, which then drives the air valve. Once the air valve is activated, it brakes the drive shaft.

19

3

Share

What is the safe speed to cross speed bumps without damaging the car?

It is generally appropriate to cross speed bumps at around 20 km/h. Driving over speed bumps, ditches, or bumps can cause impacts to the vehicle. Frequent impacts or excessive impact force can damage the car. Minor damage may affect the front wheel alignment, causing the car to pull to one side, while severe damage can harm the tires, rims, or even the undercarriage. Introduction to types of speed bumps: 1. Cement speed bumps: These are relatively high, and vehicles can pass over them at a slightly higher speed, usually between 20–30 km/h, with minimal shaking. For larger vehicles, speeds of 30–40 km/h are acceptable. Such speed bumps generally do not harm the tires, but the vehicle's ground clearance should be considered. 2. Metal speed bumps: These are usually lower in height and have an inverted V shape. They pose no threat to the undercarriage but can damage the tires. A speed of around 40 km/h is generally acceptable, but slower speeds are recommended if tire protection is a priority. 3. Liquid speed bumps: The slower the speed, the better when crossing these, preferably below 10 km/h. 4. Rubber speed bumps: These are mainly higher in height and do not harm the tires. A speed below 40 km/h is recommended, which is also the intended speed limit for areas where such bumps are installed.

18

1

Share

What kind of vehicles are generally used for transporting sand?

Vehicles used for transporting sand are generally heavy-duty trucks. The following is a related introduction: 1. Composition of heavy-duty trucks: Heavy-duty trucks consist of four main parts: the engine, chassis, body, and electrical system. Operation mainly involves the engine and chassis, with the chassis including the transmission system, running system, steering system, and braking system. 2. Major manufacturers: Currently, there are nearly 30 manufacturers engaged in heavy-duty truck production in China. The top nine in terms of market share are FAW, Dongfeng Group, Sinotruk, Shaanxi Automobile Group, Foton Motor, Beiben Trucks, SAIC Hongyan, Hualing Automobile, and JAC Motors.

13

2

Share

What are the differences between the automatic transmission and manual transmission in the third subject of the driving test?

The main differences between the automatic transmission and manual transmission in the third subject of the driving test lie in the operation method and the type of driver's license. Here are the details: 1. Different operation methods: Manual transmission requires the driver to coordinate with the clutch for gear shifting, while automatic transmission operates according to the set transmission ratio by the gearbox without manual intervention. 2. Different types of driver's licenses: The C2 driver's license test uses small automatic transmission vehicles, while the C1 driver's license test uses small manual transmission vehicles. Additional information: 1. The road driving skills test content of the third subject generally includes: preparation before getting on the car, light simulation test, starting, driving in a straight line, gear shifting operation, changing lanes, parking by the roadside, going straight through intersections, turning left at intersections, turning right at intersections, passing pedestrian crossings, passing school areas, passing bus stations, meeting vehicles, overtaking, turning around, and driving at night. 2. The safety and civilized driving common sense test content generally includes: safety and civilized driving operation requirements, safe driving knowledge under bad weather and complex road conditions, emergency handling methods for tire blowouts and other emergencies, and post-traffic accident handling knowledge.

14

5

Share

What is the function of AOFF in a car?

What does a dual-engine car mean?

What's the reason for the malfunction of the central control buttons in the Mercedes-Benz E-Class?

What is the Principle of the Handbrake?

What is the safe speed to cross speed bumps without damaging the car?

What kind of vehicles are generally used for transporting sand?

What are the differences between the automatic transmission and manual transmission in the third subject of the driving test?

Is it okay to drive in sandals with back straps?

Does the car feel underpowered after driving through water?

At which position can the car key be pulled out?

What is the purpose of a vehicle stabilizer bar?