Can Subject Two Be Scheduled for Two Sessions at Once?

What is the tire pressure for the Excelle?

The tire pressure for the Excelle is 2.4 to 2.5 bar. Tire pressure refers to the air pressure inside the tire, and the level of tire pressure plays a significant role in the performance and power of the vehicle. Taking the 2020 Excelle as an example, its body dimensions are: length 4468mm, width 1765mm, height 1469mm, with a wheelbase of 2611mm. The 2020 Excelle is equipped with a 1.3L naturally aspirated engine, delivering a maximum power of 79kW and a maximum torque of 133Nm. It is paired with a 5-speed manual transmission. The front suspension type is MacPherson independent suspension, and the rear suspension type is compound torsion beam non-independent suspension.

10

3

Share

How to Adjust Ignition Timing?

Ignition timing refers to the moment when the engine's compression stroke ends, the piston reaches the top of its stroke, and the ignition system provides a high-voltage spark to the spark plug to ignite the compressed air-fuel mixture in the cylinder for power generation. This moment is the ignition timing. Below are the steps to adjust the ignition timing: 1. Adjust the breaker contact gap of the distributor. 2. Locate the top dead center position of the first cylinder's compression stroke and loosen the first cylinder's spark plug. 3. Install the dial indicator bracket and head, ensuring the indicator's contact point vertically touches the exhaust valve spring seat with appropriate pressure, ideally keeping the small pointer on the dial indicator between 1-2. 4. Rotate the dial to set the large pointer of the dial indicator to '0'. Attach an angle disk to the flywheel and slowly rotate the flywheel, observing the dial indicator's pointer. When it moves away from '0', this marks the exhaust valve opening time, and the angle disk pointer should be adjusted to '0'. 5. Continue rotating the flywheel until the bottom dead center mark aligns with the radiator's reference line. The angle indicated by the angle gauge at this point is the exhaust valve opening angle before the bottom dead center. 6. Keep rotating the flywheel until the dial indicator pointer returns to '0', marking the exhaust valve closing time. The angle indicated by the angle gauge now represents the exhaust valve opening duration angle. 7. Use the same method to check the intake valve's opening and closing times and its opening duration angle, then adjust the distributor to the optimal ignition timing.

9

0

Share

At how many kilometers should a major car maintenance be performed?

Major maintenance refers to maintenance that includes engine care and is typically performed every 60,000 kilometers. Major maintenance is based on minor maintenance, with the two types of maintenance alternating. Minor maintenance includes oil changes, and generally, there are three types of engine oil: 1. Full synthetic: Full synthetic oil should be changed every 10,000 kilometers or once a year. 2. Semi-synthetic: Semi-synthetic oil should be changed every 7,500 kilometers or every 7-8 months. 3. Mineral oil: Mineral oil should be changed every 5,000 kilometers or every six months. Below is an introduction to the three types of engine oil: (1) Full synthetic oil: Synthetic oil is a man-made oil. During its production, various natural substances are chemically decomposed and then synthesized with other substances to finally produce synthetic oil. (2) Semi-synthetic oil: Semi-synthetic oil is a lubricant made using semi-synthetic base oil, which is refined from international Group III base oil through hydrocracking technology. It is a mixture of mineral oil and full synthetic oil in a 4:6 ratio. The purity of semi-synthetic oil is very close to that of full synthetic oil, but its cost is slightly higher than that of mineral oil. It is an ideal transitional product from mineral oil to synthetic oil. (3) Mineral oil: As the name suggests, mineral oil is extracted from minerals and is relatively viscous. Mineral oil is refined from petroleum base oil and then mixed with additives.

7

5

Share

What are the advantages and disadvantages of dual-clutch transmissions?

Advantages include relatively faster gear shifting; disadvantages involve the need to send electronic signals to the engine during upshifting/downshifting, which requires coordination with the engine after receiving its response to complete the shift. The extensive use of electronic components also increases the likelihood of malfunctions. Additional details are as follows: 1. Advantages: Fast shifting - The shifting time of a dual-clutch transmission is very short, even faster than a manual transmission, taking less than 0.2 seconds; Fuel efficiency - By eliminating torque interruption, the dual-clutch transmission ensures continuous utilization of the engine's power, always operating at optimal efficiency, thus significantly saving fuel. Compared to traditional planetary gear automatic transmissions, it is more conducive to improving fuel economy, with fuel consumption reduced by approximately 15%; Comfort - Due to the fast shifting speed, each shift in a DCT is very smooth, with minimal jerkiness that is hardly noticeable. 2. Disadvantages: Cost issues - The structure of a dual-clutch transmission is complex, with high manufacturing process requirements, leading to higher costs; Torque issues - While dual-clutch transmissions can generally meet the torque requirements of ordinary vehicles, they are still insufficient for intense usage; Low efficiency - Due to the presence of electronic and hydraulic systems, the efficiency of dual-clutch transmissions still lags behind traditional manual transmissions, especially in wet dual-clutch transmissions designed for transmitting high torque.

12

2

Share

What are the differences between VV6 and VV7?

The differences between VV6 and VV7 are their body dimensions: the VV6 measures 4625mm in length, 1860mm in width, and 1720mm in height, with a wheelbase of 2680mm; the VV7 measures 4760mm in length, 1931mm in width, and 1655mm in height, with a wheelbase of 2950mm. Both the VV6 and VV7 are equipped with a 2.0T turbocharged engine, delivering a maximum power of 167kW and a maximum torque of 387Nm, paired with a 7-speed dual-clutch transmission. They feature a MacPherson independent front suspension and a double-wishbone independent rear suspension.

3

5

Share

How to Open a Land Rover Door?

The method to open a Land Rover door is: Press the button on the door handle, and the door handle will automatically pop out, allowing you to open the door. The door provides access for the driver and passengers to enter and exit the vehicle, isolates external interference, and to a certain extent, reduces side impacts to protect the occupants. Land Rover's models include: Range Rover, Discovery, Defender, Evoque, Freelander, etc. Taking the 2021 Land Rover Discovery as an example, its body dimensions are: length 4956mm, width 2073mm, height 1888mm, wheelbase 2923mm, fuel tank capacity 90l, front track 1692mm, and rear track 1687mm.

16

0

Share

Can Subject Two Be Scheduled for Two Sessions at Once?

What is the tire pressure for the Excelle?

How to Adjust Ignition Timing?

At how many kilometers should a major car maintenance be performed?

What are the advantages and disadvantages of dual-clutch transmissions?

What are the differences between VV6 and VV7?

How to Open a Land Rover Door?

Why is the steering wheel making loud noises?

How to Clean Dirt from Car Air Vents?

How early can a vehicle's annual inspection be conducted?

What is the 'Biting Shark' car?