What does h4l mean?

1 Answers
Pearl
07/30/25 6:49am
h4 means high-speed four-wheel drive, and "l4" means low-speed four-wheel drive. The differences between h4 and l4: High-speed four-wheel drive is suitable for gravel roads, muddy roads, snow-covered terrain, sandy areas, etc. The maximum speed is generally controlled within 80km/h. Low-speed four-wheel drive provides greater torque, making it more powerful and suitable for off-roading, climbing steep slopes, descending steep slopes, and escaping difficult situations. It is rarely used for continuous driving. When using 4L, it's best to start in 1st gear and try to avoid shifting to gears higher than 2nd, while keeping the speed relatively low. Four-wheel drive vehicles: "Four-wheel drive" refers to a vehicle that maintains four-wheel drive throughout the entire driving process, with the engine's output torque distributed to the front and rear wheels in a fixed proportion. This drive mode ensures good off-road and handling performance at all times, but it cannot adjust torque distribution based on road conditions and tends to have higher fuel consumption.
Was this review help?
6
4
Share
More Forum Discussions

Will uneven shock absorber heights cause the car to pull to one side?

Uneven shock absorber heights can cause the car to pull to one side, generally towards the lower side. Reasons for uneven shock absorber heights: When braking, the car experiences forward inertia. To prevent the front of the car from scraping the ground, the front shock absorbers are set higher than the rear ones. Car shock absorbers, also known as car dampers, typically last about 80,000 kilometers with an average annual mileage of 20,000 kilometers. When they reach this mileage, they may fail to function properly and require replacement. Below is relevant information about shock absorbers: Definition of shock absorbers: Shock absorbers (Absorbers) are used to dampen the oscillations from spring rebound after absorbing shocks and impacts from the road surface. They are widely used in automobiles to accelerate the attenuation of vibrations between the frame and the body, thereby improving ride comfort. When driving on uneven roads, although the suspension springs can filter out road vibrations, the springs themselves still undergo reciprocating motion. Shock absorbers are designed to suppress this spring oscillation. Working principle of shock absorbers: Most automotive suspension systems use hydraulic shock absorbers. Their working principle involves the piston inside the shock absorber moving up and down when there is relative motion between the frame (or body) and the axle. This causes the oil in the shock absorber chamber to repeatedly flow from one chamber to another through various orifices.
2
2
Share

Is It Reliable to Trade Driver's License Points?

It is not reliable to trade driver's license points. Currently, the public security authorities have stipulated: Those who substitute for the actual driver to accept traffic violation penalties and point deductions for economic gain will have their driver's license suspended for six months and be fined between 1,000 and 2,000 yuan. For those who are caught and penalized for the first time and reoffend, as well as those who organize or introduce others to substitute for the actual driver to accept traffic violation penalties and point deductions for economic gain, they will face up to 15 days of detention, a fine between 2,000 and 5,000 yuan, revocation of their driver's license, and a five-year ban from reapplying for a driver's license.
7
2
Share

What is the lifespan of a 48V mild hybrid system battery?

48V mild hybrid system batteries typically last 3-5 years, depending on the brand and usage conditions. Here are the details: Characteristics of 48V mild hybrid system batteries: 48V mild hybrid systems usually employ power-type lithium-ion batteries with capacities mostly under 1kWh. Compared to conventional lead-acid batteries, these batteries offer greater capacity and faster charging. They work in conjunction with the motor, battery, and voltage converter to form the mild hybrid system. Applications of 48V mild hybrid systems: Many automakers have recently launched mild hybrid models, such as the Hongqi H9, Volvo S90, Audi A6L, and Mercedes-Benz E-Class.
7
3
Share

How Long Does It Take to Apply for an Electronic Driver's License?

After submitting an application for an electronic driver's license, the system will review whether the conditions for applying with an ID photo are met. If the conditions are met, the application request will be directly submitted. Once the system approves the application, the electronic driver's license can be generated immediately. Generally, the application process can be completed in just a few minutes. However, if the conditions for applying with an ID photo are not met, the process will be more complex. Introduction to Electronic Driver's License: The electronic driver's license, commonly known as the "e-license," was piloted in three cities—Tianjin, Chengdu, and Suzhou—starting from June 1, 2021. It provides drivers with online services to "show their license" or "display their code," offering greater convenience for public travel and transactions. The electronic driver's license will be fully promoted nationwide in 2022. Pilot Cities: Based on the pilot program, the Ministry of Public Security decided to expand the application of electronic driver's licenses to 28 cities starting from September 1, 2021. These cities include Beijing, Tianjin, Shijiazhuang, Changchun, Daqing, Shanghai, Wuxi, Suzhou, Yancheng, Taizhou, Ningbo, Jiaxing, Nanchang, Jinan, Qingdao, Changsha, Guangzhou, Shenzhen, Nanning, Chongqing, Chengdu, Mianyang, Zigong, Nanchong, Guiyang, Kunming, Xi'an, and Yinchuan. It is important to note that the electronic driver's licenses issued in these pilot cities are valid nationwide.
20
5
Share

How to Restore One-Touch Window Lift After Power Failure in Lavida?

To restore the one-touch window lift function after a power failure in Lavida, lift or press the corresponding window switch and hold it until the window glass reaches the top. Then release the switch and lift or press it again. If it still doesn't work, it is recommended to visit an auto repair shop. Below is an introduction to electric windows: Ordinary electric windows require holding the switch until the window reaches the desired position, then releasing the button to stop the movement. Cars equipped with one-touch window lift have a two-stage window control switch. The first stage works like an ordinary electric window. The second stage allows the window to fully open or close automatically with just one press and release.
10
4
Share

What are the symptoms of a damaged engine cylinder head gasket?

When the engine cylinder head gasket is damaged, symptoms may include loss of power with abnormal noises, white smoke from the exhaust, and burning engine oil. Below are detailed explanations: Loss of power with abnormal noises: If the gasket is burned or damaged between the cylinder edges, the engine will experience a loss of power, the vehicle will feel weak when driving, and acceleration will be poor. When the air filter is removed, abnormal noises can be heard from the intake pipe opening while the engine is idling. White smoke from the exhaust: If the burned area of the gasket connects to the water jacket hole, bubbles may appear in the radiator, the engine may overheat, and white smoke will emerge from the exhaust. Burning engine oil: If the burned area of the gasket connects to the oil passage, some engine oil may enter the cylinders and burn, resulting in blue smoke from the exhaust.
8
1
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.