What car brand is the Changan logo reversed?

What are the subjects for the automatic transmission driver's license test?

For obtaining an automatic transmission driver's license, just like a manual transmission one, you need to pass four subjects. These include the subject on road traffic safety laws, regulations, and related knowledge, the subject on site driving skills, the subject on road driving skills, and the subject on safe and civilized driving common sense. Here are some relevant details: 1. Automatic transmission driver's license: The automatic transmission driver's license is C2. The C2 driver's license is a type of driving license that only permits driving small and micro automatic transmission passenger vehicles, as well as light and micro automatic transmission cargo vehicles. 2. Automatic transmission vehicles: Generally, these are vehicles that use an automatic transmission (AT) to adjust speed. While driving, the control system of the automatic transmission automatically selects the appropriate gear based on the engine's speed and load, replacing the driver's subjective judgment of timing and gear shifting operations.

9

5

Share

What Does 177 Horsepower Mean?

177 horsepower equates to a speed of 76 meters per second. The concept of 177 horsepower represents the level of an average family car. Here are some extended details about horsepower: 1. Conversion: Since 1 horsepower = 735 watts, 1 kilowatt = 1000/735 = 1.36 horsepower, or more precisely, approximately 1.36054422 horsepower. Horsepower is a commonly used unit for measuring power in engineering. 2. Coordination: To fully utilize 177 horsepower, it requires proper engine tuning and transmission coordination to unleash all the horsepower. 3. Reference to the Civic's 1.5T engine: The model is L15B8, with a maximum horsepower of 177, maximum power of 130 KW, and maximum torque of 226 Nm. Paired with a 6MT transmission and CVT continuously variable transmission, it achieves a 0-100 km/h acceleration in about 7.2 seconds.

4

Share

Which gear is more labor-saving when driving uphill?

When driving uphill, the gear selection should be determined based on the engine speed. If the engine speed drops below 2000 RPM while in third gear, it is advisable to downshift to second gear. For steeper slopes or when the vehicle is fully loaded, it may be necessary to shift into first gear to ascend. Below are some important considerations regarding gear selection: 1. Driving in gear is safer: Controlling the vehicle is easier when driving in gear compared to neutral, providing more stability during turns and braking. While coasting in neutral can save fuel and is acceptable on flat, familiar roads, it is not recommended on mountainous terrain. Even a slight loss of control, such as fishtailing or skidding, can have serious consequences on narrow and dangerous roads. 2. Brake failure: Continuous braking on long downhill slopes can cause the brake system to overheat, potentially leading to brake failure, which is extremely hazardous.

19

0

Share

Compression Ratio 10.6: Should I Use 92 or 95 Octane Gasoline?

An engine with a compression ratio of 10.6 requires 95 octane gasoline. Generally, vehicles with engine compression ratios between 8.5-9.5 should use 92 octane gasoline, while those with compression ratios exceeding 9.5 should use 95 octane gasoline. The following explains compression ratio: Definition of Compression Ratio: It refers to the ratio between the total cylinder volume (i.e., working volume plus combustion chamber volume) and the combustion chamber volume. Compression ratio is a crucial structural parameter of an engine, representing the ratio of gas volume when the piston starts compression at bottom dead center to when compression ends at top dead center. Relationship Between Compression Ratio and Gasoline Octane Rating: Generally, higher compression ratio engines compress the air-fuel mixture into a smaller volume, delivering stronger power and lower fuel consumption. However, high compression ratios require another key parameter - the gasoline's anti-knock index (also called octane rating). Higher compression ratio engines demand gasoline with higher anti-knock properties, meaning higher octane ratings.

11

1

Share

Which is Faster, 16-tooth or 18-tooth Gear?

16-tooth is faster. When the motor-side gears are of the same size, the smaller gear on the shaft will be faster. Under normal circumstances, the 16-tooth gear should be faster, while the 18-tooth gear provides more torque. Below is relevant information about gear backlash: 1. Introduction: Gear backlash refers to the circumferential play of one gear when the other gear in an assembled gear pair is fixed, measured as the arc length on the pitch circle. In the transmission of rotating mechanisms, the pinion gear is installed with the rotary bearing as a standard component, and its tooth thickness cannot be altered. To meet the requirements of the gear bearing heavy loads, the thickness of the pinion gear cannot be reduced. 2. Design Principle: To ensure the formation of a proper lubricating oil film between tooth surfaces and to prevent the gears from jamming due to thermal expansion deformation caused by increased operating temperatures, appropriate gear backlash must be maintained during meshing.

6

2

Share

What happens if you drive without engine oil?

Lubrication effectiveness will significantly deteriorate. In severe cases, the lack of lubrication can lead to engine seizure. The less oil there is, the more severe the consequences will be. When the engine is restarted, dry or semi-dry friction will occur between the cylinders and pistons, accelerating component wear and greatly increasing startup resistance, making it difficult to start. Below is an introduction to the functions of engine oil: 1. Lubrication: The primary role of engine oil is to provide proper lubrication for engine pistons, bearings, and other components; 2. Sealing: During the "power" stroke, it prevents high-temperature, high-pressure gases in the combustion chamber from leaking into the crankcase through the gap between the piston and cylinder; 3. Heat dissipation: When the engine operates at high speeds, friction between high-speed components generates intense heat. This heat must be absorbed by the oil flowing through the component gaps and carried to the oil pan or oil cooler, where it is dissipated into the air; 4. Rust prevention: Engine oil protects metal components from corrosion; 5. Cleaning: It filters out impurities and metal wear particles generated during engine operation through the oil filter, maintaining the cleanliness of the lubrication system.

8

2

Share

What car brand is the Changan logo reversed?

What are the subjects for the automatic transmission driver's license test?

What Does 177 Horsepower Mean?

Which gear is more labor-saving when driving uphill?

Compression Ratio 10.6: Should I Use 92 or 95 Octane Gasoline?

Which is Faster, 16-tooth or 18-tooth Gear?

What happens if you drive without engine oil?

How to Clean the Car Air Conditioning Filter?

Why does it feel like there is water in the car when stepping on the brake?

What Causes the Friction Sound from Brake Discs at Low Speeds?

Where is the Dayang 150 engine produced?