What does it mean that the Haval H9 has three locks?
2 Answers
The Haval H9's three locks refer to the front and rear differential locks and the central differential lock. The function of the differential lock is to lock the differential, ensuring that both wheels have driving force, thereby improving the vehicle's off-road performance. Generally, vehicles equipped with three locks are suitable for off-road use. Types of differential locks: 1. Forced locking type: The forced locking differential lock is set on an ordinary symmetrical bevel gear differential. This type of differential lock has a simple structure, is easy to manufacture, and has a high torque distribution ratio. 2. High-friction self-locking type: The high-friction self-locking type includes structures such as friction plate type and slider cam type. The friction plate type locks the differential through the frictional torque generated when the friction plates slide relative to each other. This type of differential lock has a simple structure and operates smoothly, and is most commonly found in cars and light vehicles. 3. Torsen type: The Torsen differential is a new type of inter-axle differential widely used in all-wheel-drive cars (such as the Audi TT). The name "Torsen" is a registered trademark of the Gleason Company, representing "torque-sensing differential." It uses the basic principle of worm gear transmission with self-locking characteristics. 4. Viscous coupling type: Some four-wheel-drive cars use a viscous coupling as a differential. This new type of differential uses silicone oil as the medium for transmitting torque. Silicone oil has a high thermal expansion coefficient. When the speed difference between the two axles is too large, the temperature of the silicone oil rises sharply, and its volume expands continuously, pushing the friction plates to tightly combine. At this point, the drive shafts at both ends of the viscous coupling are directly connected as one, meaning the viscous coupling is locked.
Regarding the three differential locks on the Haval H9, my personal experience was getting stuck in mud during off-roading, and unlocking them easily got me out. The three locks refer to the central differential lock, front axle differential lock, and rear axle differential lock. When you engage them, all wheels can rotate synchronously, distributing power evenly to each wheel. This is super critical in off-road scenarios like climbing slopes, driving on sand, or muddy roads, preventing any wheel from spinning uselessly and improving traction and stability. Even on rainy or snowy roads, engaging the appropriate lock can make the vehicle safer and reduce the risk of losing control. However, remember that locking increases fuel consumption, so use them only on low-traction surfaces and avoid overuse to prevent damage to the drivetrain. It's recommended to regularly check the electronic control components—Haval’s design enhances practicality.
