What are the national standards for vehicle wading?
2 Answers
National standards for vehicle wading involve chassis height, exhaust pipe height, air filter height, intake port height, etc. Chassis height: The height of the chassis; water wading is not allowed if it exceeds the engine height. The vehicle chassis refers to the "ground clearance" item in the parameter configuration table when purchasing a car. The greater the ground clearance, the higher the chassis, and the higher the safety factor when passing through waterlogged roads. For most compact and small cars with low chassis, the position of the vehicle's intake port should be used as a benchmark when passing through waterlogged roads. Exhaust pipe height: It depends on the water depth; generally, wading is possible if the water does not exceed the car's exhaust pipe. Air filter height: Wading is allowed if the water does not exceed the height of the air filter. Below 60 cm: If the height of the exhaust pipe or intake port is above 60 cm, wading is not allowed.
When working in an automobile factory, we frequently tested wading depth, and the national standard GB/T 27876-2011 is quite clear: the air intake height of fuel vehicles must at least exceed the tire centerline. Simply put, keeping the water level below half of the wheel height is the safest. I remember rescuing a reckless SUV during last year's heavy rain season—the driver thought the high ground clearance was enough, but water flooded through the air intake, resulting in a 30,000-yuan engine overhaul. A special reminder for electric vehicle owners: although the national standard requires the battery pack to meet IP67 waterproofing, you should still drive slowly through water no deeper than 30 cm, as splashing waves can easily cause short circuits in the high-voltage system.
