Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > Suspension/Driveline/Brakes/Wheels/Tires

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #61  
Old 09-26-2010, 10:49 AM
alretired's Avatar
Premium Member
My Jeep: 2009 5.7L WK
 
Join Date: Aug 2010
Location: W.PA
Posts: 40
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1572
alretired is on a distinguished road
Re: Quadra Lift

Quote:
Originally Posted by Technosavant View Post
I can say that while the selec-terrain and ql resets at key cycle, it does NOT automatically raise back up until you get moving. If you activate park mode before going in, upon restart it won't raise until you hit 15mph or tell it to raise back up.

Sent from my MB300 using Tapatalk
Thanks for the great information!! That is what I hoped for.
__________________

__________________
2009 Limited, Brilliant black, Hemi, Magnaflow Catback. Airaid CAI. SRT8 Springs. Every available option.
2011 Overland, Bright Silver Metalic, Hemi
Reply With Quote
  #62  
Old 10-07-2010, 11:45 PM
chibianh's Avatar
Premium Member


My Jeep: 2011 5.7L WK2
 
Join Date: Jul 2010
Location: Colorado
Posts: 594
Thanks: 2
Thanked 6 Times in 5 Posts
Rep Power: 96526
chibianh has a reputation beyond reputechibianh has a reputation beyond reputechibianh has a reputation beyond reputechibianh has a reputation beyond reputechibianh has a reputation beyond reputechibianh has a reputation beyond reputechibianh has a reputation beyond reputechibianh has a reputation beyond reputechibianh has a reputation beyond reputechibianh has a reputation beyond reputechibianh has a reputation beyond repute
Send a message via AIM to chibianh
Re: Quadra Lift

With Quadra-lift, it's supposed to go into Aero mode automatically if you are sustaining speeds over 62mph. When it goes into aero mode, is there any indication of it going into aero mode in the EVIC? I've driven on the highway a few times now and if I'm in aero mode, there's no indication of it from behind the wheel.
__________________

__________________
2011 WK2 Overland 5.7 w/ Off-road Adventure II and other stuff
Reply With Quote
  #63  
Old 10-08-2010, 07:41 AM
esports15's Avatar
Premium Member
 
Join Date: Jul 2010
Location: Salt Lake City, UT
Posts: 152
Thanks: 0
Thanked 6 Times in 5 Posts
Rep Power: 15042
esports15 has a reputation beyond reputeesports15 has a reputation beyond reputeesports15 has a reputation beyond reputeesports15 has a reputation beyond reputeesports15 has a reputation beyond reputeesports15 has a reputation beyond reputeesports15 has a reputation beyond reputeesports15 has a reputation beyond reputeesports15 has a reputation beyond reputeesports15 has a reputation beyond reputeesports15 has a reputation beyond repute
Re: Quadra Lift

Quote:
Originally Posted by chibianh View Post
With Quadra-lift, it's supposed to go into Aero mode automatically if you are sustaining speeds over 62mph. When it goes into aero mode, is there any indication of it going into aero mode in the EVIC? I've driven on the highway a few times now and if I'm in aero mode, there's no indication of it from behind the wheel.
a message does appear once it goes into aero mode but it is a very brief message. this is on the EVIC
__________________
Reply With Quote
  #64  
Old 10-08-2010, 08:52 AM
Premium Member
 
Join Date: Sep 2010
Location: brOOklyn
Posts: 1,244
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 2779
JoeSchmoe007 has a reputation beyond reputeJoeSchmoe007 has a reputation beyond repute
Re: Quadra Lift

OK, so who can clarify this for the stupid:

Regular suspension is shock +spring in each corner, right?

What is QL? Is there a spring? Or is it just "air shock"?
__________________
Reply With Quote
  #65  
Old 10-08-2010, 09:44 AM
Scottina06's Avatar
JeepGarage Founder
My Jeep: 2014 6.4L SRT8 WK2
 
Join Date: May 2009
Location: Berea, Kentucky
Posts: 49,371
Thanks: 874
Thanked 1,043 Times in 718 Posts
Rep Power: 7718285
Scottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond repute
Garage
Ql is a air spring configuration. The airbag is inside the spring and is filled via a closed air system.....unlike more unreliable land rovers etc that use open type air systems

Sent from my MB300 using Tapatalk
__________________
SCOTT
The HARDER you work...the LUCKIER you are!
2014 REDLINE red Jeep SRT "BLOODIED\BlackOps CFR Edition" 1 of 1
2013 JKU Wrangler 10A-stormtrooper'ed, JW Speaker and more!
Previous JEEP rides-
2013 Jeep Grand Cherokee SRT-deep cherry
2006 Jeep Grand Cherokee Laredo-inferno red



Twitter-The_Jeep_Guy
Instagram-thejeep_guy

Reply With Quote
  #66  
Old 10-08-2010, 09:57 AM
Premium Member
 
Join Date: Sep 2010
Location: brOOklyn
Posts: 1,244
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 2779
JoeSchmoe007 has a reputation beyond reputeJoeSchmoe007 has a reputation beyond repute
Re: Quadra Lift

Quote:
Originally Posted by Scottina06 View Post
Ql is a air spring configuration. The airbag is inside the spring and is filled via a closed air system.....unlike more unreliable land rovers etc that use open type air systems

Sent from my MB300 using Tapatalk
So the airbag is inside the spring, correct?
__________________
Reply With Quote
  #67  
Old 10-08-2010, 12:22 PM
Member
 
Join Date: Oct 2010
Posts: 213
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1693
parker is on a distinguished road
Re: Quadra Lift

Quote:
Originally Posted by JoeSchmoe007 View Post
So the airbag is inside the spring, correct?

Not exactly. The airbag "is" the spring. Think class 8 truck (semi-truck) with air ride suspension, look under one next time you are commuting. Airride technology now known as ridetech have been using this system for years along with the large truck and motorhome industry, albiet without the closed air system.

The the stiffness of the spring is determined by the amount of air pressure.
Low pressure = soft ride & low ride hiegth
High pressure = stiff ride & increased ride hiegth

Actually it is like having multiple springs in one package. With actual steel springs you measure them in lbs. per inch of compression that they will sustain as well as free length. To change hiegth or softness/stiffness of ride you must change the springs. With this system a change in air pressure does this with no mechanical parts alteration. This gives the ability to change hieght as well as spring rate. In the OR (off-road) settings the vehicle will be stiffer as that is how these systems work.

The only difference between Jeep's Qaudra-lift and the airride systems currently in use is the closed air system. Instead of the compressor drawing ambient air and compressing it to fill the bags it has a storage tank. Some of ridetech's systems also utilize a storage tank for quicker fill of the bags. This allows quicker change times and a smaller compressor can keep up easily with demand.

What I'm unsure of is whether or not Jeep's system recycles the air released from the bags back to the storage tank or dumps it to the outside. Current sytems exhaust the dumped air to the outside in all commercial applications as well as aftermarket. If indeed it does recycle the dumped air I would like to know if it has a provision for the pump to compress and replenish the system capacity in case of a small leak, or if it is simply using a pump to move the air back and fourth with no compressor involved. If no compressor is involved I don't see how the system could be viable in comparison to what has been in commercial service applications for over 25 years now.

If the system indeed works with a compressor for replenishment of lost air, then it is essentially the same as many systems being used in both commercial and aftermarket applications. That being the case I would have no fear of serious problems with it as others have posted and worried about it's longevity. On commercial trucks I've seen an air suspension go well in excess of 1,000,000 miles with no problems.

This system truly resembles the muscle car and hot-rod systems from ridetech. The only difference being that the pre-sets are not user adjustable, the factory has set them within the controller. I belong to a group with a website called pro-touring.com, many of our members have used the ridetech system on car builds in the 100k and higher range as well as low budget builds with great success in both handleing and service. Look at ridetech's website and I believe that it will be very similar to their newest systems.
__________________
Reply With Quote
  #68  
Old 10-08-2010, 12:28 PM
Scottina06's Avatar
JeepGarage Founder
My Jeep: 2014 6.4L SRT8 WK2
 
Join Date: May 2009
Location: Berea, Kentucky
Posts: 49,371
Thanks: 874
Thanked 1,043 Times in 718 Posts
Rep Power: 7718285
Scottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond repute
Garage
Re: Quadra Lift




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.

Features:


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”.

- Aero

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.

- Park

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
__________________
SCOTT
The HARDER you work...the LUCKIER you are!
2014 REDLINE red Jeep SRT "BLOODIED\BlackOps CFR Edition" 1 of 1
2013 JKU Wrangler 10A-stormtrooper'ed, JW Speaker and more!
Previous JEEP rides-
2013 Jeep Grand Cherokee SRT-deep cherry
2006 Jeep Grand Cherokee Laredo-inferno red



Twitter-The_Jeep_Guy
Instagram-thejeep_guy

Reply With Quote
  #69  
Old 10-08-2010, 12:36 PM
Premium Member
 
Join Date: Sep 2010
Location: brOOklyn
Posts: 1,244
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 2779
JoeSchmoe007 has a reputation beyond reputeJoeSchmoe007 has a reputation beyond repute
Re: Quadra Lift

So this:



is not used?
__________________
Reply With Quote
  #70  
Old 10-08-2010, 12:38 PM
Scottina06's Avatar
JeepGarage Founder
My Jeep: 2014 6.4L SRT8 WK2
 
Join Date: May 2009
Location: Berea, Kentucky
Posts: 49,371
Thanks: 874
Thanked 1,043 Times in 718 Posts
Rep Power: 7718285
Scottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond reputeScottina06 has a reputation beyond repute
Garage
Re: Quadra Lift

heres another pic..

__________________
SCOTT
The HARDER you work...the LUCKIER you are!
2014 REDLINE red Jeep SRT "BLOODIED\BlackOps CFR Edition" 1 of 1
2013 JKU Wrangler 10A-stormtrooper'ed, JW Speaker and more!
Previous JEEP rides-
2013 Jeep Grand Cherokee SRT-deep cherry
2006 Jeep Grand Cherokee Laredo-inferno red



Twitter-The_Jeep_Guy
Instagram-thejeep_guy

Reply With Quote
  #71  
Old 10-08-2010, 12:39 PM
Member
 
Join Date: Oct 2010
Posts: 213
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1693
parker is on a distinguished road
Re: Quadra Lift

Quote:
Originally Posted by Scottina06 View Post
it is also actually an airbag inside a spring

I'd like to see a photo of the actual part or a cut away. This is a large misconception with air-ride systems. They use the term "air spring" because the air bag actually "is" the spring. The bags are heavier than the term air "bag" would lead you to believe. They are made similar to a tire with nylon or other type weave molded in to them. Ususlly they are around 1/8" thick if you cut one open.
__________________
Reply With Quote
  #72  
Old 10-08-2010, 12:41 PM
Member
 
Join Date: Oct 2010
Posts: 213
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1693
parker is on a distinguished road
Re: Quadra Lift

Quote:
Originally Posted by JoeSchmoe007 View Post
So this:



is not used?
Yes shocks are used. A spring simply supports the wieght, while a shock dampens and controls it's motion. In the picture above posted by Scottina06 you see the shocks for the rear suspension. On the front the airbag is taking the place of the conventional steel spring on the front strut. Therefore just like a normal strut, the shock portion is running through the center of the bag.
__________________

__________________
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Laredo X w/ Quadra Lift RyeGuy Suspension/Driveline/Brakes/Wheels/Tires 32 10-28-2010 06:52 PM
Overland QTII, Select Trac, & Quadra Lift confusion. Sir Bean Grand Cherokee - WK2 - 41 08-27-2010 09:40 AM
2011 Overland With Quadra Lift ncollado Grand Cherokee - WK2 - 23 08-13-2010 08:54 PM
2011 Jeep Grand Cherokee with Quadra Lift air suspension mangoe Grand Cherokee - WK2 - 6 06-17-2010 03:50 PM
Quadra lift LJS8510 Grand Cherokee - WK2 - 26 05-18-2010 11:19 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 05:03 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community