What Causes the Sound of Grinding Brake Discs When the Car Moves?

What is the speed range for each gear in a manual transmission?

Manual transmission speed ranges for each gear are as follows: 1st gear economic speed is 15-20 km/h; 2nd gear economic speed is 25-40 km/h; 3rd gear economic speed is 40-60 km/h; 4th gear economic speed is 60-75 km/h; 5th gear economic speed is above 75 km/h. A manual transmission (MT), also known as a manual gearbox, requires the driver to manually shift gears by moving the gear stick to change the gear engagement mechanism inside the transmission, thereby altering the gear ratio to achieve speed variation. The manual transmission uses shift forks to change the gear ratio (tooth ratio) of the meshing gears, thereby modifying the driving torque to suit different operating conditions.

6

1

Share

What are the differences between the new Civic and the old Civic?

The differences between the new Civic and the old Civic are: 1. Different engines: The new Civic engine is a 1.5T L4; the old Civic engine is a 1.8L L4. 2. Different intake forms: The new Civic uses turbocharging; the old Civic uses natural aspiration. 3. Different maximum horsepower: The new Civic has a maximum horsepower of 177ps; the old Civic has a maximum horsepower of 140ps. 4. Different maximum torque: The new Civic has a maximum torque of 220nm; the old Civic has a maximum torque of 174nm. 5. Different top speeds: The new Civic has a top speed of 200 km/h; the old Civic has a top speed of 190 km/h.

15

5

Share

What maintenance is required at 60,000 kilometers?

At 60,000 kilometers, maintenance is required for the engine, transmission, air conditioning system, steering system, braking system, suspension, body, tires, etc. Car maintenance, also known as vehicle servicing, refers to the preventive work of regularly inspecting, cleaning, supplying, lubricating, adjusting, or replacing certain parts of the car. Minor car maintenance generally refers to the routine maintenance items performed at the manufacturer's specified time or mileage to ensure vehicle performance, mainly including oil and oil filter replacement. Major car maintenance is based on minor maintenance, and these two types of maintenance are usually performed alternately.

18

1

Share

What Causes Obvious Steering Wheel Vibration When the Air Conditioning Is On?

Opening the air conditioning causes obvious steering wheel vibration due to a dirty throttle valve, which affects the engine. Car air conditioning refers to the air conditioning device installed in a vehicle, capable of cooling, heating, ventilating, and purifying the air inside the cabin. It provides a comfortable riding environment for passengers, reduces driver fatigue, and enhances driving safety. The throttle valve is a controllable valve that regulates air intake into the engine, available in traditional cable-operated and electronic types. After entering the intake pipe, the air mixes with gasoline to form a combustible mixture, which then burns to perform work. It connects to the air cleaner at the top and the engine block at the bottom.

9

5

Share

When to Use the Car ECO Mode?

The car ECO mode is best used in congested urban traffic conditions, where it effectively improves fuel economy. Under ECO mode, the carbon deposits in the engine are roughly similar to those produced under normal driving conditions. The main principle of the ECO mode is not complicated. It involves a comprehensive analysis of factors affecting fuel consumption during vehicle movement, such as automatic transmission gear position, engine speed, vehicle speed, braking, and transmission oil temperature. The ECU control unit calculates the optimal fuel quantity to supply the engine, effectively reducing fuel consumption compared to normal driving modes. Simply put, it controls the engine speed with appropriate gear selection to minimize unnecessary fuel consumption. ECO is an abbreviation, with its Chinese translation representing Ecology (environmental protection), Conservation (energy saving), and Optimization (power). The ECO mode is further divided into active and non-active ECO driving modes. When the ECO indicator on the dashboard lights up, it signifies that the vehicle's economy mode has been activated. The ECO mode is categorized into active and non-active types. The difference lies in the fact that the active type has a dedicated button, allowing the driver to choose whether to enable it. When the driver presses the ECO mode switch, the dashboard indicator lights up, and the vehicle automatically adjusts settings such as throttle opening, transmission shift logic, and air conditioning output power. The non-active ECO mode does not have a dedicated button. When the ECO indicator on the dashboard lights up, it serves merely as a reminder. The ECO system automatically evaluates your driving behavior. If your current driving operation achieves the optimal fuel supply, the dashboard will simultaneously display the ECO indicator. Most vehicles employ the active ECO driving mode, which features a dedicated switch button. Therefore, during daily driving, we can enable the ECO mode. However, it is unnecessary to activate the ECO mode when driving at speeds exceeding 120 km/h, during idle parking, in N/P gear, or in manual mode, especially when climbing hills, as this would not demonstrate the fuel-saving characteristics of the ECO mode. Additionally, the ECO mode typically becomes ineffective under the following circumstances: When the vehicle speed exceeds 120 kilometers per hour, the system prioritizes speed, causing the ECO mode to deactivate automatically. During idle parking or when in N/P gear or manual mode, the ECO mode may also become ineffective. When high torque output is required, such as during hill climbing, the engine control unit prioritizes delivering sufficient power to drive the vehicle, and the ECO mode will not operate.

20

5

Share

How many cylinders does the VV7 engine have?

VV7 engine is a 4-cylinder engine. The manufacturer of VV7 is Great Wall Motors, classified as a mid-size SUV. The engine is a 2.0T L4 with turbocharged intake, delivering a maximum horsepower of 227 PS and a maximum torque of 387 Nm. The dimensions of this car are 4760mm in length, 1931mm in width, and 1655mm in height, with a wheelbase of 2950mm. It is a 5-door, 5-seat SUV with a 7-speed dual-clutch transmission. An engine can refer to both a power generation device and the entire machine including the power unit (such as gasoline engines, aircraft engines). Its types include internal combustion engines (e.g., gasoline engines), external combustion engines (e.g., Stirling engines, steam engines), gas turbines (used in racing cars), electric motors, etc.

10

1

Share

What Causes the Sound of Grinding Brake Discs When the Car Moves?

What is the speed range for each gear in a manual transmission?

What are the differences between the new Civic and the old Civic?

What maintenance is required at 60,000 kilometers?

What Causes Obvious Steering Wheel Vibration When the Air Conditioning Is On?

When to Use the Car ECO Mode?

How many cylinders does the VV7 engine have?

How to Remove a Car Steering Wheel?

What Components Does the Valve Train Include?

What is the relationship between Venucia and Dongfeng Nissan?

What is Indirect Tire Pressure Monitoring?