RLE Systems' kneeling modules feature Over-Raise and Low-Ride, giving the operator the ability to raise above or lower below normal ride height, and maintain desired ride height for as long as needed without draining the air tanks. Normal ride height is resumed once passengers have easily accessed the vehicle. Or, once clear of chassis obstacle.
The kneeling bus module is used for easy entrance and exit of bus, motor coach, and similar type vehicles with a high entrance platform. Kneeling is the lowering of the bus by letting air out of its air suspension, or airbags. Kneeling lowers the entrance platform so passengers aren’t required to step as high to enter or exit the bus, which is an improvement in both comfort and safety. After passengers are safely on the vehicle, air is pumped back into the airbags, and the vehicle can continue.
The kneeling bus module works in coordination with the leveling valve, which maintains the vehicle at a prescribed ride height. The leveling valve maintains ride height by continuously supplying or exhausting air from the airbags. The adjustment of airbag pressure is required to compensate for the changing vehicle weight due to passengers entering and exiting the vehicle. While kneeling, the kneeling module isolates the leveling valve from the airbags, preventing the leveling valve from trying to raise the vehicle as passengers enter or exit the vehicle. After kneeling, the kneeling module utilizes a high-flow valve to quickly return the vehicle to ride height, allowing the vehicle to continue.