Werkedperformance

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End stop control valve video. Can't find much on these dampers yet. Looks like a bottom out hydraulic cone and spring?

Anyone else have any thoughts. Someone said the ESCV was active but I'm not seeing it.



Update: ESCV explained with crappy "diagrams".

Shock absorbers function through the "resistance" of the fluid contained inside their body to flow through small restrictions in the piston. As you go over a bump, the rod of the shock absorber is pushed through the fluid inside. It is slowed down because the piston is a restriction to this movement of the shaft. This is the basic principle of a shock. If the shock is becoming shorter it is under "compression". If the shock is getting longer it is under "rebound". The piston of the shock has shims that flex and provide resistance to fluid flow through the pistons orifices.

The ESCV shocks on the bronco have three main features that separate them from a "traditional" run of the mill shock on everyday vehicles.....

1. External Reservoirs
2. Compression ESCV
3. Rebound ESCV

The external reservoir attached to the main shock body provides a few functions.
1. It contains the IFP or internal floating piston. This device separates nitrogen and shock fluid from mixing.
2. This nitrogen charge helps the shocks work better. It prevents cavitation, but we aren't going there right now.
3. The floating piston displaces when the rod takes up volume inside the shock body.
4. The reservoir allows extra fluid volume so the shock runs cooler.

Compression End Stop Control Valve:
This makes the shock have more resistance to movement under compression, toward the end of travel. The circular spring loaded device puts pressure on the compression shims as the shock gets closer to bottom. This adds resistance to movement. Think I hit a really big bump.... But it didn't smack hard on landing. It had extra resistance for big hits.

Rebound End Stop Control Valve:This makes the shock have more resistance to movement under rebound, toward the end of travel. The circular spring loaded device puts pressure on the rebound shims as the shock gets closer to bottom. This adds resistance to movement. Think I hit a really big jump.... But it didn't clang hard on takeoff when I left the ground....

BILSTEIN ESCV 2021 Ford Bronco suspension shocks dampers~4.png


BILSTEIN ESCV 2021 Ford Bronco suspension shocks dampers~3.png


BILSTEIN ESCV 2021 Ford Bronco suspension shocks dampers~2.png





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North7

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End stop control valve video. Can't find much on these dampers yet. Looks like a bottom out hydraulic cone and spring?
Anyone else have any thoughts. Someone said the ESCV was active but I'm not seeing it.
Great find, you are correct, they are not active. Here is some more information I was able to dig up.
The all-new Bronco has available best-in-class maximum suspension travel.* To complement that suspension travel, available Trail Stability Control™, with its Bilstein™
position-sensitive-damping (PSD)
shocks, utilizes end stop control valve (ESCV) technology to provide control and stability during spirited off-road driving.
The High-Performance Off-Road Stability Suspension (HOSS) comes on the Wildtrak and Badlands, and these are also available on any other trim if you buy the Sasquatch package. The use of Bilstein shocks is a departure from the Fox shocks used on the Range Raptor, but I wouldn’t read too much into that.

Bronco’s Bilsteins have remote reservoirs that increase oil volume for cooler running, and they also have internal hydraulic end stops that give them position-sensitive damping. They’ll be soft in the middle of their travel and firm up to the ends to soak up big hits with less chance of bottoming or topping out. The end-stop concept is similar to what you’d find on an early TRD Pro Tundra, but that truck’s Bilsteins didn’t have the additional benefit of remote reservoirs.
July 15, 2020
Who is getting excited to get your hands on a new Ford Bronco? Reserve yours yet? BILSTEIN ESCV suspension will keep you riding right!
_nc_ohc=7KNgl5An0AsAX_GJUOd&_nc_ht=scontent-dfw5-2.png




BILSTEIN ESCV 2021 Ford Bronco suspension shocks dampers.png
 
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Werkedperformance

Werkedperformance

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Amazing find North7!

You can actually see how it works in the picture you posted.

The large ring is a "blocker ring" and is sealing off compression ports on the piston, once the piston hits the spring loaded ring.
 

deznut

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Old style motorcycle forks use a cone at the bottom of the stroke to progressively stop the travel of the wheel...aka bottom out...the youtube feature is too short to see anything (imo) ...here is link to Racetech's suspension Bible that shows a cross sectional drawing and the cone at the bottom of the fork...the idea is that hydraulic pressure would progressively build up to stop the fork from a metal to metal stop...liquids have the unique property of not being compressable...the fork oil stops the fork from metal to metal contact...hth
https://racetech.com/page/title/Emulators-How They Work
 

BroncoChicken

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Good info. I’m seriously thinking about buying these aftermarket and switching the tires to 33”s on ours instead of the Sasquatch pkg.

One thing though, Ford is using the HOSS (High-performance Off-road Stability Suspension) designation for all Bronco suspensions. The upgraded Badlands/Wildtrak/Sasquatch suspension is designated as HOSS with Bilstein position sensitive dampers.
 

North7

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Good info. I’m seriously thinking about buying these aftermarket and switching the tires to 33”s on ours instead of the Sasquatch pkg.

One thing though, Ford is using the HOSS (High-performance Off-road Stability Suspension) designation for all Bronco suspensions. The upgraded Badlands/Wildtrak/Sasquatch suspension is designated as HOSS with Bilstein position sensitive dampers.
This shows a good view of it:

1600864284408.png
 

Cased

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Looks like a very good way to change the valving inside the shock
My old race quad has three differant spring rates with travel collar's but didn't have the extend / unloaded control these have
 
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Werkedperformance

Werkedperformance

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Looks like a very good way to change the valving inside the shock
My old race quad has three differant spring rates with travel collar's but didn't have the extend / unloaded control these have
Its a reliable cost effective way to greatly improve chassis control. I have high hopes for this setup. The factory tuned Bilstein 7100s on my 2003 Level 2 Ranger are good dampers for the price. These are like 7100s on steroids, with reservoirs and bottom out.
 

North7

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Its a reliable cost effective way to greatly improve chassis control. I have high hopes for this setup. The factory tuned Bilstein 7100s on my 2003 Level 2 Ranger are good dampers for the price. These are like 7100s on steroids, with reservoirs and bottom out.
While I love the bottom out control for the 5% I will off-road, I'm really hoping the " soft in the middle" means the 95% of the time I use it for my Daily Driver it will have comfortable on road manners.

Okay, I admit it, I'm coming from an SUV, not a TRUCK, so I'm use to and still want a good daily driver. I know the forum is full of truck and jeep people that will say, WHAT, but this is why I did not buy a Jeep Wranger or a Ranger class pickup with I bought my SUV in 2017.

I think the Bronco will bring in many people, like me, as new owners who will also appreciate a comfortable daily driver.
 

618TRVLWILD

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While I love the bottom out control for the 5% I will off-road, I'm really hoping the " soft in the middle" means the 95% of the time I use it for my Daily Driver it will have comfortable on road manners.

Okay, I admit it, I'm coming from an SUV, not a TRUCK, so I'm use to and still want a good daily driver. I know the forum is full of truck and jeep people that will say, WHAT, but this is why I did not buy a Jeep Wranger or a Ranger class pickup with I bought my SUV in 2017.

I think the Bronco will bring in many people, like me, as new owners who will also appreciate a comfortable daily driver.
I feel you on this! When I traded my Jeep off it was mainly bc I thought I'd make it work as a daily but when I took off on road trip it was just awful to drive long distances to get to the off road parks. I didn't off road enough to justify keeping at a daily bc it made me wanna park it all the time never drive it. I came from a hummer h3 before the jeep that I loved and it checked all my boxes. After the jeep I lucked into a deal and now I got a Mercedes GLA. I love my car but miss my ground clearance and now the occasional off road fun and dirt road drives. I'm hoping the same for the Bronco. Basically like having my beloved H3 back. 90% daily 10% off road, ditch jumper, road tripper! Until my 5 year plan then it's going to be transformed into an overlander!!
 

395N

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This shows a good view of it:

1600864284408.png
Somewhere in the Ford marketing it refers to "high clearance suspension". Is that what comes standard on the BL or something that is mixed in with the Sasquatch package?
 
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