What car does the 'S' logo represent?

What does it mean when the engine power is reduced?

The reasons for displaying reduced engine power include: 1. Excessive carbon buildup in components such as cylinders, throttle valves, and spark plugs: When there is too much carbon buildup inside the engine, the vehicle's ignition energy decreases, intake efficiency drops, ultimately leading to reduced engine power and symptoms like weak idling. 2. Malfunction in the fuel system: Using an incompatible fuel grade can cause a decrease in the vehicle's output power, resulting in reduced power. Alternatively, if the fuel tank vent is blocked or components like the fuel tank switch, fuel filter, or fuel lines between the tank and carburetor are partially clogged, the required fuel supply cannot be met, leading to overly lean air-fuel mixture and weak engine acceleration. 3. Severe wear of pistons, piston rings, or cylinders: This increases the clearance between pistons, piston rings, and cylinders, reducing sealing effectiveness and causing cylinder head leakage, which lowers cylinder compression pressure. 4. Engine overheating: This leads to poor lubrication, increased mechanical wear, reduced engine power, and higher fuel consumption.

7

1

Share

Can Non-Independent Suspension Be Replaced with Independent Suspension?

Non-independent suspension cannot be replaced with independent suspension. If a car uses non-independent suspension, it is generally not possible to modify it into independent suspension. Most cars use independent suspension for the front suspension and non-independent suspension for the rear suspension. Information about non-independent suspension and independent suspension is as follows: 1. The structural feature of non-independent suspension is that the wheels on both sides are connected by an integrated frame. The wheels, together with the axle, are suspended under the frame or body through an elastic suspension system. It has the advantages of simple structure, low cost, high strength, easy maintenance, and minimal changes in front-wheel alignment during driving. 2. Independent suspension mostly uses coil springs, so for lateral forces, vertical forces, and longitudinal forces, guide devices (i.e., rods) are required to bear and transmit these forces. Therefore, some cars use multi-link suspension to reduce weight and simplify the structure.

3

2

Share

Do Vehicle Fuel Injectors Need Cleaning?

Vehicle fuel injectors do require cleaning. The recommended cleaning interval for fuel injectors is every 2 years or 50,000 kilometers. Additionally, if the vehicle frequently operates on poor road conditions, the fuel injectors should be cleaned earlier. Clogged fuel injectors can significantly impact the vehicle's power output, and in severe cases, may even prevent the engine from starting. Below is relevant information about fuel injectors: 1. The fuel injector (fuel-spray-nozzle) is essentially a normally closed valve. When the electromagnetic coil is energized, it creates a magnetic force that lifts the needle valve, opening the injection port. Fuel is then sprayed at high speed through the annular gap between the needle valve head and the injection port, forming a fine mist that facilitates complete combustion. 2. The primary function of automotive fuel injectors is to coordinate with the valve timing mechanism and ignition timing, injecting gasoline into the cylinder in precise quantities and at the right moment. This allows the spark plugs to ignite the fuel mixture, generating power for the vehicle.

20

5

Share

What is the passing score for Subject 2 driving test?

Subject 2 has a full score of 100 points, with evaluation criteria set for failing, deducting 20 points, deducting 10 points, and deducting 5 points. The test is considered passed under the following conditions: ① For applicants applying for large buses, tractors, city buses, medium buses, or large trucks, a score of 90 or above is required; ② For other vehicle types, a score of 80 or above is required. The test items for small vehicles C1 and C2 include reversing into a garage, parallel parking, stopping and starting on a slope (canceled for C2), turning at a right angle, and driving on an S-curve (commonly known as S-turn) as five mandatory items (some regions have a sixth item, high-speed card collection). The test items for large vehicles A1, A2, A3, B1, and B2 include stake test, stopping and starting on a slope, parallel parking, passing a single-plank bridge, driving on an S-curve, turning at a right angle, passing a width-limited gate, passing continuous obstacles, driving on bumpy roads, making a U-turn on a narrow road, as well as simulated highway driving, continuous sharp turns on mountain roads, tunnels, rainy (foggy) conditions, slippery roads, and emergency handling. If a candidate fails the Subject 2 test on the first attempt, they are allowed one retake. If the candidate does not take the retake or fails the retake, the test is terminated, and the applicant must reschedule the test after ten days. Within the validity period of the driving test permit, the number of rescheduling for Subject 2 and Subject 3 road driving skill tests must not exceed five times. If the candidate fails the fifth rescheduled test, the results of other passed subjects will be invalidated.

16

5

Share

How many liters of coolant does a BMW 3 Series need?

BMW 3 Series requires 4 liters of coolant. Coolant is a type of cooling liquid containing special additives, primarily used in liquid-cooled engine cooling systems. It offers excellent performance in preventing freezing in winter, boiling in summer, and protecting against scale and corrosion throughout the year. How to replace coolant: Before completely replacing the coolant, conduct a thorough inspection to check for any signs of leakage or cracks in the pipes, with a particular focus on the five-way hose. Coolant flows through the five-way hose before being distributed to different parts of the car to perform its function. If there is any leakage of coolant in this section, replace the hose or re-secure the connection as needed. Drain the old coolant, then flush the liquid channels with clean water. Add clean water to the coolant reservoir and continue filling it until the water flows continuously through the engine cooling system. Then, start the engine and let it idle for 3 to 5 minutes to circulate the water. The initial water flowing out of the reservoir may have a faint pink color. Continue adding clean water until the outflowing water is clear. Note: Don’t forget to remove the heater hose and drain the water from the heater core. Approximately one hour after draining, add the new coolant through the radiator hose. Then, pour another bottle of coolant into the coolant reservoir until it is nearly full. Start the engine and let it run for about 10 minutes. During this time, the coolant level will drop slightly as air is purged from the cooling system. Add more coolant until it reaches the "MAX" mark on the reservoir.

13

3

Share

What car is represented by a leopard?

A leopard represents Jaguar, a British luxury car manufacturer. Taking the 2020 Jaguar XFL two-wheel-drive Feng Hua Edition as an example, it is a mid-to-large-sized 4-door 5-seater sedan with body dimensions of 5093mm in length, 1880mm in width, and 1456mm in height, with a wheelbase of 3100mm. The 2020 Jaguar XFL two-wheel-drive Feng Hua Edition is equipped with a 2.0T turbocharged engine and an 8-speed automatic transmission, delivering a maximum power of 147 kilowatts and a maximum torque of 320 Newton-meters. Its drive system is front-engine rear-wheel drive, featuring a double-wishbone independent suspension at the front and a multi-link independent suspension at the rear.

10

1

Share

What car does the 'S' logo represent?

What does it mean when the engine power is reduced?

Can Non-Independent Suspension Be Replaced with Independent Suspension?

Do Vehicle Fuel Injectors Need Cleaning?

What is the passing score for Subject 2 driving test?

How many liters of coolant does a BMW 3 Series need?

What car is represented by a leopard?

What are the operating steps for an automatic transmission?

Is the coolant for the BMW 5 Series exclusive?

What to Do When the Car Air Conditioner Won't Turn Off?

What is the working principle of a manual transmission?