Machines | Roll Center & Vehicle Body Roll - Explained
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The body roll of a car is influenced by the distance between the roll center and the center of gravity of the vehicle, The larger this distance, the larger the roll moment, and thus the more body roll the vehicle has. By manipulating the suspension geometry, you can alter the amount of body roll by increasing the height of the roll center and bringing it closer to the center of gravity. Please feel free to rate, comment, and subscribe! And don't forget to check out my other pages: Facebook - http://www.facebook.com/engineeringexplained Official Website - http://www.howdoesacarwork.com Twitter - http://www.twitter.com/jasonfenske13 Instagram - http://www.instagram.com/engineeringexplained To help create more videos, check out my Patreon page! http://www.patreon.com/engineeringexplained NEW VIDEO EVERY WEDNESDAY!
Comments
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So by stiffening the suspension, we set the roll center higher?
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Superb explanation man. Its very simple and easily understandable!!!
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what would happen if you put the roll center above the center of gravity.
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So what happens when both witshbones (uper and lower) are parallel to each other i.e. baja bugs and sand dune cars...? how do we found the roll center of their body
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We build off-road cars and one off the goals is to have a massive oversteer effect, the cars are rear driven, for that we need a lower roll center height at the back?
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Nice Explanation.. Keep it Up!!!
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sick'!~ Youtube recognizes underscores as italics feature
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i don't understand (unRelated to this particular video... but): doesn't "launching" put stress on vehicles, especially manual transmission? The whole idea of engaging clutch while there is a big difference between wheel speed and engine speed- is this not stressful on the car and lead to premature wear?
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awesome info!
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What happens if the roll center is above the center of gravity? Is it just the absolute value of the distance between the roll center and the center of gravity that matters?
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first i wanna let you know that you are doing a great job
well i have a doubt
how is center of gravity related to my roll center(in context of minimize the body roll)?? -
And here's the question. we have the macpherson suspension. Normally we lower the car (front macpherson) , as low as the tire size allows and the handling is improved as the result but in macpherson, the upper A-arm is the strut top and is fixed and has little to some mild angle. We lower the car, the lower A-arm is tilted downwards. It means if the angle of < is positive, turns toward zero, or even negative. The instantanious center is altered downwards. The biggest impact is noticeable on suspensions with short A-arms. The car that runs high has a jacking feel of one side. (body roll?) The same car lowered has great steering response, excellent cornering and fun to drive. So, on the contrary of what u'r saying, lowering the roll center helps until the jacking effect is minimized. I believe this is why we lower a car front 5 cm, but lowering the CG 5 cm doesn't seem to have a noticeable change. This is why lowering cars with solid axles or lifting them like offroad cars doesn't change things... I'm pretty much confused. with lowering the body roll decreases. but if we increase the moment length of body roll we will have more body roll.
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dude, u know a lot of things. i thought u only know about engines. what's ur educational degree? Where I come from, very rarely car guys know about roll center and advanced vehicle dynamics...
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sir iam using a triple suspension at the front of my quad bike how can i check out my roll centre height
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how do we ensure that torque produced on rear and front sprung mass about roll centre are same
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Would the same process apply to a suspension where the angle above the x-axis is higher for the upper control arm than for the lower? Take Formula 1 cars for example. It seems like on the Ferrari F2012 specifically and I believe a few McLarens both control arms are angled upward but it at least appears that the upper control arm is at a higher angle. would the instantaneous center just be outside the car and possible below the ground?
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Whats happening with the little Acura?
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Hey, just wanted to say thanks for the videos you helped me learn more about cars and in detail whit good explanations keep it going man !!
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Hypothetically, can the CG ever be below the roll center (by artificially adding a ton of weight down low)? What would happen then?
Are there any science behind why or just not set up properly? If adjusted will my alignment need adjusting?
Front are macpherson struts w/ fully adjustable coilovers
Rear are Multilink w/ fully Adjustable coilovers
Thanks!!