|
Post by natedog on Jan 13, 2013 12:19:24 GMT 1
Random question: My truck has a load sensing valve on the rear axle. I know these things work by increasing the rear brake effort as the suspension drops under weight as you load it up, but its also got self leveling air suspension, so what's the point of it?
sent from my HTC using proboards android app
|
|
remmington
Apprentice
Owns Spark Eroder
Posts: 4,974
Member is Online
|
Post by remmington on Jan 13, 2013 13:53:04 GMT 1
Random question: My truck has a load sensing valve on the rear axle. I know these things work by increasing the rear brake effort as the suspension drops under weight as you load it up, but its also got self leveling air suspension, so what's the point of it? sent from my HTC using proboards android app Umm... Never thought of this, but you are right, what is the point!
|
|
|
Post by Steve Parker on Jan 13, 2013 14:08:06 GMT 1
When you brake even with air suspension rear of the car will lift the valve will then reduced pressure to rear brakes to prevent wheels locking is what i was told
|
|
|
Post by natedog on Jan 13, 2013 14:25:42 GMT 1
Yup, that would make sense
sent from my HTC using proboards android app
|
|
|
Post by trickydicky on Jan 13, 2013 15:07:26 GMT 1
Yup, that would make sense sent from my HTC using proboards android app If you watch an F1 car onboard you will see the driver messing with the front/rear brake balance quite a bit as the fuel load comes down, the suspension is virtually non existent and they have designed most of the squat and lift out of it. Its all to do with the weight and how it effects momentum as Steve has suggested.
|
|
french crap fanatic
Apprentice
french car specialist based in dagenham east london
Posts: 3,355
|
Post by french crap fanatic on Jan 13, 2013 15:39:02 GMT 1
Random question: My truck has a load sensing valve on the rear axle. I know these things work by increasing the rear brake effort as the suspension drops under weight as you load it up, but its also got self leveling air suspension, so what's the point of it? sent from my HTC using proboards android app if its anything like citroen hydraulics then it works like this. the rear suspension also feeds the rear brakes,as the pressure rises cos its self levelled,the rear brakes get more pressure applied.its as simple as that.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jan 13, 2013 16:47:55 GMT 1
It works the oposite way you think , very confusing ;D
|
|
|
Post by natedog on Jan 13, 2013 20:39:14 GMT 1
It's just a valve on the chassis with an arm going onto the axle
sent from my HTC using proboards android app
|
|
Stilo
Apprentice
Posts: 1,536
|
Post by Stilo on Jan 13, 2013 21:30:01 GMT 1
I'm certain our old Renault Scenic had one of those load sensing valves. It sat atop of the rear axle and a it moved with the axle to adjust brake balance depending on axle position relative to the body (and therefore the load applied to it)
|
|
|
Post by natedog on Jan 13, 2013 22:34:22 GMT 1
Aye, that's how it works. But with self levelling suspension...
sent from my HTC using proboards android app
|
|
|
Post by trickydicky on Jan 13, 2013 22:58:39 GMT 1
Aye, that's how it works. But with self levelling suspension... sent from my HTC using proboards android app As you brake the weight transfers to the front of the truck and the chassis lifts away from the rear axle (self levelling cant respond fast enough under emergency braking). The proportioning valve reduces pressure to the rear brakes to prevent the rears locking up.
|
|
|
Post by natedog on Jan 13, 2013 23:04:55 GMT 1
The only advantage I can see is lowering the back end onto the floor to save having to load it up when it goes in for test
sent from my HTC using proboards android app
|
|
|
Post by wheelnut on Jan 14, 2013 0:45:02 GMT 1
I presume the truck does not have ABS, I think that would make a load valve unnecessary.
|
|
|
Post by natedog on Jan 14, 2013 1:07:16 GMT 1
No, it does have abs. Pulses very slow compared to car abs as its full air
sent from my HTC using proboards android app
|
|