How to Check If the Driver's License Has Been Mailed?

How to Identify the Brand and Model of Car Tires?

The name code, specifications, ply rating, rim specifications, speed rating, and other details of a tire are usually marked on one side of the tire. The brand code on the tire can be used to identify the tire brand. Here are specific details about tires: 1. Tire marking 195/65R15 (91V) indicates a tread width of 195 millimeters, an aspect ratio of 65, R15 refers to radial tires, a tire diameter of 15 inches, a load index of 91 indicating a maximum load capacity of 615 kilograms, and a speed symbol V, representing a safe speed of 240 kilometers per hour. 2. Some tires are also marked with M+S, indicating suitability for mud and snow, TUBELESS indicating tubeless tires, and TreadWear indicating the tread wear index, among others. 3. Identification of tire speed rating. The maximum speed at which a tire can carry a specified load under specified conditions. Letters A to Z represent the certified speed ratings of tires from 4.8 km/h to 300 km/h.

16

4

Share

What does hold mean?

hold refers to the handbrake or parking system, which is a derivative function of electronic parking. Some vehicles are equipped with an autoh or autohold button, representing automatic handbrake or automatic parking, both of which are standard features of electronic parking brake systems. It is designed to prevent rolling on slopes during short stops or traffic jams. The function needs to be activated before each use. Even in D gear, there is no need to keep pressing the brake pedal; simply stepping on the accelerator will release it. The functions of autohold include: 1. During driving, when encountering situations like red lights that require a short stop, the system will automatically brake the wheels after the vehicle comes to a complete stop to prevent rolling; 2. When starting the vehicle, it will automatically brake to prevent rolling. Once the vehicle has sufficient power to move forward, the system will automatically release the wheels, allowing the vehicle to proceed; 3. After parking, there is no need to pull the handbrake, as the system will automatically brake the wheels at this time.

18

2

Share

How to Test the Quality of a Two-Wire ABS Sensor?

You can use a multimeter to test the ABS sensor. First, disconnect the ABS ECU wiring socket or unplug the wheel speed sensor's wiring connector. Then, rotate the tested wheel at a low speed and use the multimeter's mV range to measure the voltage between the corresponding terminals of each wheel speed sensor. Under normal conditions, the multimeter reading should be above 70mV. Here are detailed explanations about the ABS sensor: 1. The ABS sensor is used in a vehicle's ABS system to monitor the speed. It works with a toothed ring that rotates synchronously with the wheel, generating a set of quasi-sinusoidal AC signals whose frequency and amplitude are related to the wheel speed. This output signal is transmitted to the ABS electronic control unit (ECU), enabling real-time monitoring of the wheel speed. The quality of the ABS sensor determines the sensitivity of the ABS system, which is crucial for driving safety. 2. Both the pump and the sensor are components of the ABS system and serve the ABS. Individually, they have no function. The working principle of a vehicle's Anti-lock Braking System (ABS) is as follows: It relies on highly sensitive wheel speed sensors installed on each wheel and a vehicle speed sensor on the body, controlled by a computer. During emergency braking, if any wheel is detected to be locked, the computer immediately instructs the pressure regulator to release (reduce) pressure in the wheel's brake cylinder, allowing the wheel to resume rotation.

1

0

Share

What engine and transmission are used in the Weichai U70?

Weichai U70 uses Dongan transmission. Dongan Automotive Engine Manufacturing Co., Ltd., abbreviated as Dongan Qifa, was established on September 4, 1998, and is jointly invested by China, Japan, and Malaysia, known as the "three countries and six parties." The company is mainly engaged in the research, development, production, and sales of manual transmission (MT) products. It is the first enterprise in China to possess manufacturing technologies for engines, automatic transmissions, and manual transmissions simultaneously. The Weichai U70 transmission is equipped with a 6-speed automatic manual transmission. The automatic manual transmission has eight forward gears. Essentially, an automatic manual transmission is a traditional AT or CVT transmission with added manual shifting functionality. The purpose of the automatic manual transmission is to enhance the driving pleasure of automatic transmission vehicles. When using the transmission of the Weichai U70 in daily driving, the following points should be noted: Do not delay changing the transmission oil for an extended period. Prolonged failure to change the transmission oil can lead to damage to internal components such as bearings and the housing. Avoid coasting in neutral for long durations. While driving manual transmission vehicles, many experienced drivers may coast in neutral, but for automatic transmission vehicles, this can cause the transmission to overheat, and shifting back into D gear may produce a certain impact. Never shift into D/R gear before the vehicle has come to a complete stop. Many drivers, to demonstrate "smooth" operation, shift directly into reverse gear before the vehicle has fully stopped, which can significantly damage the internal gears of the transmission and, over time, lead to gear grinding and other faults. Avoid frequently climbing steep slopes in D gear. When facing steep slopes, automatic transmission vehicles often overheat due to high load or shift up too early, resulting in insufficient climbing power. In such cases, manual mode can be used to limit the gear to a lower speed or sport mode to protect the transmission. Do not tow the vehicle over long distances. If an automatic transmission vehicle breaks down, it should be moved onto a flatbed tow truck with the transmission in N gear, rather than being towed directly with a tow rope or similar means.

3

1

Share

What to Do If the Car Chassis is Scraped and Leaking Engine Oil?

Drive the car to a nearby repair shop, lift the vehicle, and carefully inspect the chassis. If the pipes are not damaged and only the steel plate has minor scratches, applying anti-rust paint will suffice. If the pipes are damaged, a thorough inspection and repair are necessary. If the chassis is found to be scraped, it is recommended not to continue driving. Instead, take the car to a nearby repair shop for a comprehensive inspection to prevent oil or gas leaks that could lead to vehicle fires, which are difficult to extinguish and may even endanger lives. Here is additional information: 1. The parts of the car chassis most prone to damage are various pipes, such as brake hydraulic pipes and fuel pipes. However, these pipes are usually hidden and protected in the grooves of the chassis steel plate, making them difficult to scrape. 2. If the chassis hits a step, the steel plate of the chassis contacts the step in a flat state. Therefore, the pipes hidden in the grooves of the steel plate will not be damaged, so there is no need to worry excessively about the fuel pipes being scraped. 3. If the impact is caused by a protruding part of the ground, it is a point-like impact with significant force. Protruding stones may hit the pipes in the grooves, causing oil or fluid leaks. In this case, extra attention is required to identify the cause of the impact and the location of the leak.

1

Share

What are the interior maintenance items for a car?

Here are the basic car maintenance items: 1. Regular oil changes: Not changing the oil for a long time can cause severe wear and tear on engine components, reducing the engine's lifespan. Manufacturers recommend changing the oil every 5,000 or 10,000 kilometers. Therefore, it is important to choose high-quality oil. 2. Regular replacement of the three filters: The three filters refer to the air filter, oil filter, and fuel filter. These filters help remove impurities from the engine, protecting it and improving its efficiency. The replacement cycle for the three filters is the same as that for the oil during routine maintenance. 3. Power steering fluid replacement: Power steering fluid, commonly known as steering fluid, should be checked regularly for leaks or unusual noises. Vehicles with electronic power steering are maintenance-free and do not require steering fluid replacement. The maintenance cycle for steering fluid is approximately 60,000 kilometers. 4. Brake fluid replacement: Brakes are crucial for driving safety. Brake fluid has strong water-absorbing properties and can automatically absorb moisture from the air. Therefore, it is important to regularly check the brake fluid level and top it up or replace it if it falls below the standard value. 5. Coolant replacement: Coolant ensures the engine operates normally. Regularly check the coolant level to ensure it is within the standard range and inspect the coolant reservoir for leaks. On average, the coolant should be replaced once a year. 6. Battery inspection and replacement: The battery ensures the engine starts properly. Check the color of the 'eye' in the observation window on the top of the battery to see if it is green. The lifespan of a battery is generally around two years, and it may be shorter in cold weather.

14

1

Share

How to Check If the Driver's License Has Been Mailed?

How to Identify the Brand and Model of Car Tires?

What does hold mean?

How to Test the Quality of a Two-Wire ABS Sensor?

What engine and transmission are used in the Weichai U70?

What to Do If the Car Chassis is Scraped and Leaking Engine Oil?

What are the interior maintenance items for a car?

Should You Use Internal or External Air Circulation When Smoking in the Car?

How Long Will It Take for Problems to Occur if a Steel Wool Ball is Stuffed into the Exhaust Pipe?

How to Replace Brake Fluid for Audi Q5?

Where is the Dongfeng Fengguang 580 produced?