What Are the Causes of Engine Belt Noise?

Does Using Reserve Fuel Damage a BMW?

Using reserve fuel can damage a BMW. The fuel pump is typically located inside the fuel tank, but when the tank is empty, the pump is exposed to air, lacking lubrication, which can affect its lifespan. Therefore, it is advisable to avoid using the reserve fuel tank and not to drive until the tank is nearly empty before refueling. Below are some precautions for fuel tank usage: 1. Do not wait for the low fuel warning light to come on before refueling: Drivers should check the fuel gauge before driving and calculate whether refueling is needed based on the trip distance and the fuel gauge reading. It is better to refuel in advance rather than waiting for the warning light to come on. The fuel pump is located inside the tank and operates at high temperatures when continuously working; being submerged in fuel helps cool it effectively. When the warning light comes on, it indicates the fuel level is below the pump. Repeatedly waiting for the light to come on before refueling can shorten the pump's lifespan, and having too little fuel in the tank may even cause the pump to burn out. 2. Choose to refuel in the morning or evening: Generally, temperatures are lower in the early morning and evening, and gasoline has a lower vaporization point. Therefore, it is better to refuel during these times. Gasoline expands with heat and contracts with cold, and it is sold by volume. At lower temperatures, gasoline has a relatively higher density, meaning more mass per unit volume, so you get more fuel for your money. 3. Avoid filling the tank completely when driving in the city: When driving in urban areas, there is no need to fill the tank completely. A full tank adds extra weight to the engine, increasing fuel consumption. Since refueling is convenient in the city, there is no need to fill the tank to the brim.

9

4

Share

What is the braking distance of the BYD Han?

The BYD Han has a 100-0km/h braking distance of 32.56 meters and a 60-0km/h braking distance of 13.11 meters. Below is relevant information about automotive braking distance: 1. Introduction to Braking Distance: Braking distance is one of the most important indicators for traffic management departments during vehicle inspections. The 100km/h braking distance refers to the distance a vehicle travels from the moment the brakes are fully applied at a speed of 100 kilometers per hour until it comes to a complete stop. Currently, there is no specific standard for the optimal braking distance, but generally, a distance within 42 meters is considered excellent, 42-45 meters is acceptable, and anything above 45 meters is considered failing. 2. Factors Affecting Braking Distance: Generally, the more pistons a brake caliper has, the better its braking performance. Additionally, the wear on brake pads and discs can significantly impact braking efficiency. The vehicle's load also affects braking distance; in real-world scenarios, the more cargo a vehicle carries, the longer its braking distance tends to be.

12

5

Share

What is the driving principle of BYD Qin Plus DM-i?

The driving principle of BYD Qin Plus DM-i is that in fuel mode, the accelerator pedal position sensor detects the pedal position and sends the signal to the engine ECU. The ECU controls the change in fuel injection pulse width to regulate the increase or decrease of engine speed. Below is an introduction to the BYD Qin Plus: 1. Body dimensions: The length, width, and height are 4765 mm, 1837 mm, and 1495 mm respectively, with a wheelbase of 2718 mm. 2. Powertrain: Equipped with a 1.5-liter naturally aspirated engine. This engine has a maximum power of 81 kW at 6000 rpm and a maximum torque of 135 Nm at 4500 rpm. The engine features multi-point fuel injection technology and uses an aluminum alloy cylinder head and block.

2

Share

What does automatic transmission D321 mean?

Automatic transmission D1, D2, D3 are the low gear modes of the transmission. Automatic transmission D1 is similar to manual transmission gears 1 and 2; automatic transmission D2 is similar to manual transmission gears 3 and 4; automatic transmission D3 is similar to manual transmission gears 5 and 6. Automatic transmission D1 has the largest gear ratio and the strongest torque output, suitable for climbing steep slopes or towing other vehicles; automatic transmission D2 has a reduced gear ratio and torque output, also suitable for climbing or towing; automatic transmission D3 has moderate torque and power output capabilities. Directly engaging it while driving can downshift to obtain greater torque output for overtaking, with no noticeable jerking, and the throttle response will be quicker. The function of the gear limit in a car is that using the gear limit can lock the vehicle in a fixed forward gear without upshifting or downshifting, and the transmission will not shift to a higher gear.

2

3

Share

What does the N in automatic transmission mean?

Automatic transmission N gear is the neutral gear, which usually means that the shift lever of the motor vehicle is not placed in any forward or reverse gear, and the transmission is completely separated from the drive wheels. If the car suddenly stalls while driving, you can directly shift the gear to N gear to restart the ignition without needing to restart the engine. If you shift to P gear, you need to stop the car and restart the engine. When the vehicle is driving at high speed, the engine speed and the output shaft speed of the automatic transmission will be very high. Once the gear is switched to N gear, it will cause the engine to lose contact with the wheels, and the hydraulic lines inside the automatic transmission will also experience insufficient oil pressure. Automatic transmission means that the vehicle will automatically select the appropriate gear based on driving speed and traffic conditions. Its working principle is to use a planetary gear mechanism that can automatically shift gears according to the degree of the accelerator pedal and changes in vehicle speed. The driver only needs to operate the accelerator pedal to control the vehicle speed.

12

0

Share

Should You Use Recirculation or Fresh Air Mode for Car AC in Summer?

If the driving duration is not particularly long and the distance is not very far, using the recirculation mode is relatively better. However, for long-distance trips, it's advisable to alternate between recirculation and fresh air modes. Here are some tips for using car AC effectively: 1. Ventilate before turning on AC: After the car has been exposed to prolonged sunlight, first open all four doors and the sunroof to allow air circulation for 3 minutes. This quickly lowers the interior temperature, making the AC cooling more effective when turned on. 2. Use recirculation mode wisely: Recirculation blocks outside hot air, creating a closed space inside the vehicle where air rapidly circulates under AC effect for quick cooling. Once the interior temperature drops, it's recommended to switch to fresh air mode every 30 minutes to purify cabin air, then return to recirculation after 5 minutes. 3. Turn off AC timely: Shut off the AC 5 minutes before parking, which both protects the engine and saves fuel.

4

5

Share

What Are the Causes of Engine Belt Noise?

Does Using Reserve Fuel Damage a BMW?

What is the braking distance of the BYD Han?

What is the driving principle of BYD Qin Plus DM-i?

What does automatic transmission D321 mean?

What does the N in automatic transmission mean?

Should You Use Recirculation or Fresh Air Mode for Car AC in Summer?

What does D/S± mean in automatic transmission?

Do I Need to Press Any Button to Switch Between N and D Gears in an Automatic Transmission?

Should the car be in P or N gear when warming up?

Does Starting an Automatic Car Without Pressing the Brake Damage the Vehicle?