The Quadra-Lift air suspension system provides height control and lifts the vehicle up to 4.1 inches from park mode to a best-in-class maximum ride height of 10.7 inches. Quadra-Lift is supported by four-corner air springs that provide a cushioned, premium ride. It operates automatically, or may be controlled manually via console controls. It can function independent of the Selec-Terrain system according to driver selection. The Quadra-Lift system will be available on the Limited and Overland starting in July 2010.
Full time four corner load leveling
Closed type air suspension design results in fast ride height changes
Ability to change ride height with the push of a button
Max ground clearance 10.7”
4.1” of total travel
Improved off-road performance by increasing ground clearance with 2 settings: Off-Road II is 2.6” higher than normal ride height (NRH) and Off-Road I is 1.3” higher than NRH
Automatically lowers at highway speeds to reduce drag resulting in better fuel economy (0.5” lower than NRH)
Park mode provides lowers vehicle for easier entry & exit (1.5” lower than NRH)
Quadra-Lift Air Suspension settings
The Quadra-Lift system features five height settings for optimum ride performance, each with its own benefits.
- Off-Road 2 (OR2)
Provides the maximum ride height of 2.6 extra inches (10.7 inches of ground clearance) for the highest clearance over obstacles. This position also provides the best approach, departure, and breakover angles.
- Off-Road 1 (OR1)
Provides 1.3 extra inches (9.4 inches of clearance) for off-roading, but allows a bit more suspension comfort. This position provides a good balance between ground clearance and ride comfort. The vehicle height will change automatically from Off-Road 2 to Off-Road 1 when vehicle speed exceeds 25 mph.
- Normal (NRH)
The standard ride height and is best for all-around driving conditions. It offers 8.1 inches of clearance and provides the most comfortable balance of ride and handling. The vehicle height will change automatically from Off-Road 1 to Normal when vehicle speed exceeds 50 mph. The vehicle height will change automatically from Aero to Normal when vehicle speed drops below 25 mph, or when vehicle speed is less than 60 mph and the user changes the Selec-Terrain switch from “Sport” to “Automatic”.
Lowers the vehicle just over a half inch to maximize aerodynamics and fuel economy at highway speeds. This position also reduces body roll and provides a “sportier” feel. “Aero” ride height is achieved automatically when the vehicle reaches 60 miles per hour, or by selecting “Sport” mode on the Selec-Terrain switch.
Lowers the entire vehicle 1.5 inches below normal height to make loading and unloading people or cargo much easier. It is activated when the driver selects the DOWN button on the Selec-Terrain/Air Suspension control. The vehicle height will also change automatically from Park to Normal when vehicle speed exceeds 5 mph.
The system also continually monitors passenger, cargo and trailer tongue weight and adjusts the air suspension automatically, to maintain a level ride.
A closed system – because it’s better
Quadra-Lift is a closed system so adjustments are much faster than other systems that must draw in or exhaust air for operation. It is the first SUV to use the latest air suspension technology utilizing a closed type design.
The closed type system does not draw in fresh air during vehicle lifting or leveling-up, or pump air out to the atmosphere during lowering or leveling down. Instead it moves stored pressurized air from the reservoir to the air springs and back again.
Since the system’s compressor is working with pre-pressurized air, and not air at atmospheric pressure, the compressor can be smaller which translates into reduced power consumption and weight as well as improved NVH characteristics.
By working with pre-pressurized air, the closed air suspension system also provides additional benefits to the customer:
Reduced time to change vehicle height
A significantly greater number of repeated lifts without lift time deterioration
System performance that is unaffected at higher altitudes when compared to an open type air suspension