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What is the Haval H6's on-demand four-wheel drive?

2 Answers

HectorMarie

07/25/25 2:38am

On-demand four-wheel drive, as the name suggests, refers to a drive system that engages four-wheel drive only when necessary, while remaining in two-wheel drive under normal conditions. This term distinguishes it from part-time four-wheel drive, which requires manual switching between two-wheel and four-wheel drive, and full-time four-wheel drive, which operates in four-wheel drive under all conditions. 1. Full-time four-wheel drive: Full-time four-wheel drive has a complex structure with numerous and heavy transmission components, which significantly reduces power responsiveness. If a small-displacement engine is equipped with full-time four-wheel drive, a noticeable lack of power can be felt. Moreover, due to the high power consumption of full-time four-wheel drive, it significantly impacts the vehicle's fuel efficiency, whereas on-demand four-wheel drive can better balance fuel economy. 2. Limitations of on-demand four-wheel drive: Currently, most on-demand four-wheel drive systems are constrained by structural limitations when transferring power between the front and rear axles, unable to deliver more than 50% of the power to the rear axle. This limits its active safety control capabilities compared to the broader adjustment range of full-time four-wheel drive. Additionally, compared to part-time four-wheel drive, its physical structural limits for handling rough terrain are relatively lower. On-demand four-wheel drive systems typically use open differentials on both axles, meaning that in certain complex road conditions where two wheels on one side lose traction, the vehicle may still struggle to free itself.

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StFinley

08/10/25 4:40pm

I've been driving the Haval H6 for a while now. The part-time 4WD system means it normally runs on either front or rear wheels to save fuel, but automatically switches to four-wheel drive when slipping occurs, like on rainy, snowy, or muddy roads, with all wheels working together. The system uses sensors to detect wheel speed changes—if a wheel slips significantly, it quickly adjusts power distribution. From personal experience, driving in the rain feels much more stable and less prone to losing control. It's quite smart in design, requiring no manual operation, making it suitable for city driving with occasional off-road use. Of course, compared to full-time 4WD, it's more fuel-efficient and easier to maintain, though it’s not as powerful in extreme conditions. Still, the Haval H6’s system genuinely boosts everyday practicality.

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