Braking in turn Steering effort : Scrub radius . Negative scrub also helps reduce torque steer in front wheel drive cars. /ColorSpace /DeviceGray It could be positive, negative or zero. /Decode [1 0] scrub radius is preferred and also too much of scrub radius either positive or negative results high steering kickback. %PDF-1.4 /Filter [/FlateDecode /CCITTFaxDecode] /Height 76 Positive scrub radius works well with suspensions that use dual control arms that use less caster and SAI to optimize geometry. ��.�HL����� The scrub radius induced understeer on AX radius corners was gawdawful. x�uxuTT]��DBZ����i����v�$$��FB�K���TJ`H�߼�������u׺�S����g?�b�� �c m ]Q_Q vP� n�!�%! VƥX@v'ʭ忸�y���2p���)��n��o��r���K�"��g�u��q��=|��@�Х���%Hz���n��l�]�#m2d ��R_p֐��uܰ�/!X����^"�����d[�_3k����w��Z����MR"E_�>V!? Mq�1����L�w���2���2���]�6�CQ"��&?eΕ�W�P��TU&�ʹ�Dp Ζs�h8�`!��ӱ#G-a]�#^��o�L�σ�a0�,��C#���="�oQU}w�i�$=��� ��-ذ?+���æu��iʞ��n���敟)E�$\�{�o%�(q�y�j:���g?>{^�c�q7��@z�q����O�jn��b*i�U#��W 3�*%�I� U��Ҳ�.�v�_ϖz�S��"U��w��v�������lS z�����+&utR�� �t��G-9b5T�3v���4�릂%�:$wn{�h�� 6"mϙ��l8kd�Wd�%8���x`kѪX�`�SA�%�i�y����N'�-�͌�{� �29�R�)9�Dfт�M�,v6'� 9�?9ICD%b�g�:Ƣ ��5��`]��_���%B[��Cq �ϊ����f8�;}K's��+��� �b ��]C\�" ������׉��1� �bNY,���[�6�� e�rGZ�6��k��ѧޥ�i�����#�^����L�2��輇 |�X��.7�T�~3j^e� ?�^_�"DžA{���A�ө�jp��3�����T��)��T����[��*�82�3s���'��� ����JbJ��+����32N�ũ?YLN�'���$wO{5X�����ȟn����P8���QY���). FAQ’s Terminology Micro Cellular Jounce Bumper Scrub Radius Spring Rate 101 TECH NOTES H&R Technical Information Sheet (PDF) FAQ’s 1) Which are the front and rear springs? I cringe when I see 3" wheel spacers and a set of deep dish wheels to get full width, without changing the axle. SAI is an imaginary line, that on strut suspensions runs through the lower ball joints and the upper end of the strut. : +33 (0)4 50 02 34 34 Fax: +33 (0)4 50 68 58 93 Website: www.exxotest.com 11 00312458-v1 MT-TWINGO 1.2.3. /Filter [/FlateDecode /CCITTFaxDecode] >> Camber Ca Definition Camber is … /Type /XObject /Filter [/FlateDecode /DCTDecode] /Length 135 Trackwidth The Distance between centre axis of tire from front view is known as trackwidth. !mZ�Ͷ��5�x:n�(�7�|:��X�s^�XH�0 ��-��)Va�t���8�S���n���O�b���n"!/��Ĩ� ��;Ho���u�c��g�"boN��UK�@�3�+F>пشW�6��IJ E��cH3�eD�:Ou�Ջ�+9�Zϒq��%�v��`!�6 ��i�^6~�&�wM?V�����H��S˸�o7��⺠޳��+�TɁ��(-n7J��j��9��k��r�02��3����|��|�s��4f�S �M�� In an embodiment of the present invention, an apparatus for steering a vehicle is disclosed. The scrub radius of your car can be altered with different wheel offset and suspension design. What Is Scrub Radius? Enter the email address you signed up with and we'll email you a reset link. >> This is actually desirable to help counteract Toe-in forces caused by positive caster. �������7��� stream /ColorSpace /DeviceGray x�| ��&��FD���Q�G�d������ x����i��3������m������x/���k���e�����`�_�t���P� )�d��y�Bי/����#̔U�י$���d������l7�� @�mH� �fYUz�ټ�d�U9��+M��챠p�VN��y� stream Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) You can download the paper by clicking the button above. *���m���k���u��r ��a���1|1�~�|*�,P���dz�a�W$��y�� You could watch the … 5 0 obj Page 1 of 2 - SCRUB RADIUS. Scrub radius helps this feel by providing feedback from the contact patch. !��H� $� Q�> �۠� �w�6!�܀J t���۷��q���~ ���]vQ�{�/ 9�� This will affect how the tire contact patch interacts with the road during cornering, braking, and acceleration, and can cause unique toe characteristics depending on the design. 0.225 m StW radius, measured from centre to rim edge. !e�{�����������%���!����'}_@DTBB�+�(#� $. With a small amount of scrub radius, the tire is turned about the kingpin axis, slightly offset from the tire’s centerline. /BitsPerComponent 8 8 inch wide wheels & a slightly narrower slick cured this. o�O���4hI�Y̆ЖB̒ܤ�nZ��ˮmVR�ZB��B[K^�?3"����㷼 ��A�yy��������I��oo����f��[¾U(�� �\G��7eK��r@]A��7�a�h�e3,��'���dsŮ��i݉8��������+�W��z����6}jii�YD�x3]�Nia���s���/�#ݒvT�z:_�������kk����#�{���啬W�� /Height 222 endobj >> It is noted that the rate of change in scrub radius is reduced considerably which results in less tire wear and more stability . /DecodeParms [null <>] endobj But, with a positive scrub radius, you then have a small radius, from the KPI axis contact point with the ground, out to the centre of the contact patch. << 7 0 obj stream Scrub radius basically refers to the distance between the tyre centre line and the point at which the Kingpin axis meets the ground in the front view. I remember a long time ago with manual steering cranking the wheel to full lock while stopped. In 2008 USQ’s FSAE team was forced to abandon the competitiondue to a crash into a barrier which was thought to have been caused by the car’s suspension and steering system. %���� A 5-6" scrub radius on these vehicles can lead to some pretty disconcerting drifts/pulls during hard braking and/or rough road conditions. SAI is an imaginary line, that on strut suspensions runs through the lower ball joints and the upper end of the strut. Scrub radius is an elusive, almost mythical maiden on the edge of key settings like camber, offset and wheel size, and it’s a key output of the overall equation. >> The biggest effect is called bump steer. ��\�+���$���X��A�(o^i�$^���ozs��́�ɗ=ތz8�i���G�6 NK2���?��G�0����^��3o�0�{h�+] �혘��|ј� Sorry, preview is currently unavailable. �q2w�./�y �m}$|gl���eތ�0��8�t]^��@�/�R}����+�m���:�i�#R���?�����5ַc�w�z3���=�����_��Q1��+YwEu ng��7ъX�{K��oj�@������r���GSD!sij�̲����e�z)���Еr�(d�g�heq�@��aʔ`H\A����@���`�{,�G������6�� �{��2�S. endobj n�o8,~�ʿ�~04�d����xW����38kVpc�Gi 祽�5���}2Z�8z�u�:嘤Lp�����^�/�!h�� The location of the steering gear linkage or rack can have a … to 0 cm of scrub radius in the blow-out case. FRONT = Springs marked: VA, or (F), or Front. proportional to the scrub radius, which will be felt by the driver at the steering wheel. I wonder if any one would have any thoughts on a problem I have. /Subtype /Image Academia.edu no longer supports Internet Explorer. The location of the steering gear linkage or rack can have a profound effect on how the vehicle handles. Scrub radius : 10% . /Producer (PDF-XChange 4.0.181.0 \(Windows Seven Ultimate Professional Service Pack 1 \(Build 7601\)\)) The inclination of the KP axis in the side view is caster. We live & learn. 18 Time variation of steering assistance angle for different scrub radii 4.6 Simulation of Brake-in-turn Analysis to Study the Effect Scrub Radius In brake-in-turn analysis, the vehicle was made to run on the circular test track of 3.5 m radius with lateral acceleration of 0.35 g and then the brakes were applied. It also reduces the risk, that a lose of traction on one front wheel during braking, causes the car to change direction. The apparatus includes a back-drivable steer-by-wire system including a road wheel actuator assembly coupled to a wheel of the vehicle. 2) Which end of the spring is up? 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