Basic principles of an F1 steering mechanism

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anishhotpunk
anishhotpunk
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Joined: Wed Oct 06, 2010 5:35 pm

Basic principles of an F1 steering mechanism

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I am reading the forum,for a long time.
I am interested to know how the F1 car steering,

I means where is the steering rack?
How different it is ?
What are key mechcansim to operate , geometry of it ?

Regards,

ANISH #-o
Last edited by Steven on Sun Jan 02, 2011 1:30 pm, edited 1 time in total.
Reason: Removed capitals

scarbs
scarbs
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Location: Hertfordshire, UK

Re: HOW F1 CAR STEER, MECHCANSIM , BASIC PRINCIPLE.

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F1 steering systems are basically similar to Road Cars or any other race car. The steering wheel's attached to the column, which operates a rack&pnion steering rack, the track rods transfer the motion to the wheel\upright. F1 cars use a hydraulically assisted rack, while the column has a joint in it
(see the images below for a schematic and detail of the system.

Schematic
Image

Column
Image

Rack
Image

Rack & Pinion
Image

steering joint
Image

anishhotpunk
anishhotpunk
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Joined: Wed Oct 06, 2010 5:35 pm

Re: Basic principles of an F1 steering mechanism

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thanks dear ...!

It seems you have great knowledge about the f1 developments. Thanks for helping me out.

regards ,

anish

anishhotpunk
anishhotpunk
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Joined: Wed Oct 06, 2010 5:35 pm

Re: Basic principles of an F1 steering mechanism

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as shown in the pictures (1st one), people talk about the differnet aspects of steering in F1, like aniti-ackerman, ackerman. what is the use of this knd of geomtry, how teams make decide what to use or not to. speacially , do we have to consider the equation of suspension geomtry in implementing the steering mechcansin etc. please throw some light on these aspects.

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mep
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Location: Germany

Re: Basic principles of an F1 steering mechanism

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Maybe we should make an ackerman topic.

anishhotpunk
anishhotpunk
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Re: Basic principles of an F1 steering mechanism

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vaibhav
vaibhav
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Joined: Thu Oct 08, 2020 10:25 am

Re: HOW F1 CAR STEER, MECHCANSIM , BASIC PRINCIPLE.

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scarbs wrote:
Sun Jan 02, 2011 1:11 pm
F1 steering systems are basically similar to Road Cars or any other race car. The steering wheel's attached to the column, which operates a rack&pnion steering rack, the track rods transfer the motion to the wheel\upright. F1 cars use a hydraulically assisted rack, while the column has a joint in it
(see the images below for a schematic and detail of the system.

Schematic
http://scarbsf1.files.wordpress.com/201 ... ematic.jpg

Column
http://scarbsf1.files.wordpress.com/201 ... column.jpg

Rack
http://scarbsf1.files.wordpress.com/201 ... t_rack.jpg

Rack & Pinion
http://scarbsf1.files.wordpress.com/201 ... pinion.jpg

steering joint
http://scarbsf1.files.wordpress.com/201 ... gjoint.jpg
So, can you tell me, how they are operating rack with hydraulic in this small design???
I mean what is the cut section or design of the F1 steering rack and pinion with a hydraulic system looks like???

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strad
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Re: Basic principles of an F1 steering mechanism

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??? you confuse me. It works like any hydraulic system.
To achieve anything, you must be prepared to dabble on the boundary of disaster.”
Sir Stirling Moss

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godlameroso
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Joined: Sat Jan 16, 2010 8:27 pm
Location: Miami FL

Re: Basic principles of an F1 steering mechanism

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The hydraulic pump fills a chamber either end of the rack and pinion gears, as the chamber fills it pushes the gears in either direction.
The height of cultivation is really nothing special. It is merely simplicity; the ability to express the utmost with the minimum. Mr.Lee

scarbs
scarbs
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Joined: Wed Oct 08, 2003 8:47 am
Location: Hertfordshire, UK

Re: Basic principles of an F1 steering mechanism

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F1 power steering rack Image

http://imgur.com/gallery/QkOJcGH

The basic unassisted rack and pinion set remains the same. F1 racks must be mechanical and no electronic aids.

There is a hydraulic valve (left of centre - green), this uses some compliance between the pinion and rack, the small amount of movement shifts the valve and that directs hydraulic pressure into the actuator to help move the rack.
The compliance comes from the grey 'M' shaped spring, which positions the pinion against the rack. Ateams will tailor this to give the driver the feel they need.

Greg Locock
Greg Locock
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Re: Basic principles of an F1 steering mechanism

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Fun fact. In a conventional hydraulic rack and pinion steering system both sides of the piston are at full pressure. One of them gets exhausted to give pressure differential across the piston.

Ackerman. There more than 3 theories on this. Theory one is that it is all too complicated and you should just use parallel steer. Theory 2 is that the the inner wheel should be oversteered to increase the yaw moment on entering a corner, by causing drag on the inner wheel. Theory 3 is that the outer wheel is more heavily laden and will reach its peak slip angle at a different steer angle than the inner, and so the steering should be set up to optimise both. Theory 4 is that static toe behaves much like Ackerman.