VEHICLE SUSPENSION LINKAGE
A two-wheel vehicle suspension linkage includes a plurality of linkage bodies including: a suspended body, and a wheel carrier body operatively coupled to one another, wherein the plurality of linkage bodies form at least seven known instantaneous velocity centers (IVCs), and no more than two of the at least seven known IVCs are formed at respective jointed connections to the suspended body; and a shock assembly. The shock assembly is operatively coupled to the plurality of linkage bodies, and the suspension linkage includes: a transmission element force vector tangent to respective tops of a driving element and a driven element, and an anti-squat curve with a first portion having a positive slope.
1 . A two-wheel vehicle suspension linkage comprising:
a plurality of linkage bodies including:
a suspended body, and
a wheel carrier body operatively coupled to one another, wherein the plurality of linkage bodies form at least seven known instantaneous velocity centers (IVCs), and no more than two of the at least seven known IVCs are formed at respective jointed connections to the suspended body; and
a shock assembly, wherein:
the shock assembly is operatively coupled to the plurality of linkage bodies, and
the suspension linkage includes:
a transmission element force vector tangent to respective tops of a driving element and a driven element, and
an anti-squat curve with a first portion having a positive slope.
2 . The suspension linkage of claim 1 , wherein the anti-squat curve includes a second portion having a negative slope.
3 . The suspension linkage of claim 2 , wherein the negative slope occurs, at least partially, at a vertical wheel travel greater than the vertical wheel travel at which a sag point occurs.
4 . The suspension linkage of claim 2 , wherein a magnitude of the negative slope of the anti-squat curve is greater than a magnitude of the positive slope.
5 . The suspension linkage of claim 1 , wherein at least one anti-rise value within a travel range of the suspension linkage is greater than an anti-rise value when the suspension linkage is at an extended state.
6 . The suspension linkage of claim 1 , wherein an anti-rise value at an extended state of the suspension linkage is less than an anti-rise value at a compressed state of the suspension linkage.
7 . The suspension linkage of claim 1 , wherein an anti-rise first increases and then decreases as the suspension linkage moves from an extended state to a compressed state within a travel range.
8 . The suspension linkage of claim 1 , wherein the suspension linkage has an anti-rise curve less than 80% throughout a travel range of the suspension linkage.
9 . The suspension linkage of claim 1 , wherein the suspension linkage has an anti-rise curve greater than 40% throughout a travel range of the suspension linkage.
10 . The suspension linkage of claim 1 , wherein a DIVC Ratio DIVC[R] is greater than 1.
11 . The suspension linkage of claim 1 , wherein a dynamic IVC migration (DIVC) is located at least partially in front of at least a portion of the shock assembly in at least a portion of a travel range of the suspension linkage.
12 . The suspension linkage of claim 1 , wherein a DIVC direction variable DIVC[DV] is greater than zero.
13 . The suspension linkage of claim 1 , wherein:
the plurality of linkage bodies includes:
a second body, a third body, a fourth body, a fifth body, and a sixth body, wherein the plurality of IVCs comprises:
an IVC[ 13 ][ 15 ] ( 20 ) at a jointed connection between the suspended body and the third body;
an IVC[ 13 ][ 17 ] ( 21 ) at a jointed connection between the suspended body and the fifth body;
an IVC[ 15 ][ 16 ] ( 24 ) at a jointed connection between the third body and the fourth body;
an IVC[ 15 ][ 18 ] ( 25 ) at a jointed connection between the third body and the sixth body;
an IVC[ 14 ][ 17 ] ( 23 ) at a jointed connection between the second body and the fifth body; and
an IVC[ 17 ][ 18 ] ( 26 ) at a jointed connection between the fifth body and the sixth body.
14 . The suspension linkage of claim 13 , wherein in an at least partially extended state of the suspension linkage the IVC[ 15 ][ 18 ] ( 25 ) is located rearward of a line segment defined by the IVC[ 15 ][ 16 ] ( 24 ) and the IVC[ 17 ][ 18 ] ( 26 ).
15 . The suspension linkage of claim 13 , wherein a line segment defined by the IVC[ 15 ][ 18 ] ( 25 ) and the IVC[ 17 ][ 18 ] ( 26 ) is located at least partially rearward of a line segment defined by the IVC[ 13 ][ 15 ] ( 20 ) and the IVC[ 15 ][ 16 ] ( 24 ).
16 . The suspension linkage of claim 1 , wherein the plurality of linkage bodies includes:
a second body, a third body, a fourth body, a fifth body, and a sixth body, and the plurality of IVCs comprises:
an IVC[ 171 ][ 173 ] ( 178 ) at a jointed connection between the suspended body and the third body;
an IVC[ 171 ][ 175 ] ( 179 ) at a jointed connection between the suspended body and the fifth body;
an IVC[ 173 ][ 174 ] ( 182 ) at a jointed connection between the third body and the fourth body;
an IVC[ 174 ][ 176 ] ( 183 ) at a jointed connection between the fourth body and the sixth body;
an IVC[ 172 ][ 175 ] ( 181 ) at a jointed connection between the second body and the fifth body; and
an IVC[ 175 ][ 176 ] ( 184 ) at a jointed connection between the fifth body and the sixth body.
17 . A two-wheel vehicle suspension linkage comprising:
a plurality of linkage bodies including:
a suspended body, a second body, a third body, a fourth body, a fifth body, and a sixth body together forming a plurality of IVCs including:
an IVC[ 13 ][ 15 ] ( 20 ) at a jointed connection between the suspended body and the third body;
an IVC[ 13 ][ 17 ] ( 21 ) at a jointed connection between the suspended body and the fifth body;
an IVC[ 15 ][ 16 ] ( 24 ) at a jointed connection between the third body and the fourth body;
an IVC[ 15 ][ 18 ] ( 25 ) at a jointed connection between the third body and the sixth body;
an IVC[ 14 ][ 17 ] ( 23 ) at a jointed connection between the second body and the fifth body; and
an IVC[ 17 ][ 18 ] ( 26 ) at a jointed connection between the fifth body and the sixth body, wherein the suspension linkage includes:
a transmission element force vector tangent to respective tops of a driving element and a driven element, and
an anti-squat curve with a first portion having a positive slope.
18 . The suspension linkage of claim 17 , wherein the anti-squat curve has a second portion with a negative slope.
19 . The suspension linkage of claim 18 , wherein the negative slope occurs, at least partially, at a vertical wheel travel greater than the vertical wheel travel at which a sag point occurs.
20 . The suspension linkage of claim 18 , wherein a magnitude of the negative slope of the anti-squat curve is greater than a magnitude of the positive slope.
21 . The suspension linkage of claim 17 , wherein at least one anti-rise value within a travel range of the suspension linkage is greater than an anti-rise value when the suspension linkage is at an extended state.
22 . The suspension linkage of claim 17 , wherein an anti-rise value at an extended state of the suspension linkage is less than an anti-rise value at a compressed state of the suspension linkage.
23 . The suspension linkage of claim 17 , wherein an anti-rise first increases and then decreases as the suspension linkage moves from an extended state to a compressed state within a travel range.
24 . The suspension linkage of claim 17 , wherein the suspension linkage has an anti-rise curve less than 80% throughout a travel range of the suspension linkage.
25 . The suspension linkage of claim 17 , wherein the suspension linkage has an anti-rise curve greater than 40% throughout a travel range of the suspension linkage.
26 . The suspension linkage of claim 17 , wherein a DIVC ratio DIVC[R] is greater than 1.
27 . The suspension linkage of claim 17 , wherein a DIVC direction variable DIVC[DV] is greater than zero.
28 . The suspension linkage of claim 17 , wherein in an at least partially extended state of the suspension linkage the IVC[ 15 ][ 18 ] ( 25 ) is located rearward of a line segment defined by the IVC[ 15 ][ 16 ] ( 24 ) and the IVC[ 17 ][ 18 ] ( 26 ).
29 . The suspension linkage of claim 17 , wherein a line segment defined by the IVC[ 15 ][ 18 ] ( 25 ) and the IVC[ 17 ][ 18 ] ( 26 ) is located at least partially rearward of a line segment defined by the IVC[ 13 ][ 15 ] ( 20 ) and the IVC[ 15 ][ 16 ] ( 24 ).
30 . The suspension linkage of claim 17 , further comprising:
a shock assembly, wherein:
a dynamic IVC migration (DIVC) is located at least partially in front of at least a portion of the shock assembly in at least a portion of a travel range of the suspension linkage; and
a DIVC direction variable DIVC[DV] is greater than zero.
31 . A two-wheel vehicle suspension linkage comprising:
a plurality of linkage bodies including:
a suspended body, a second body, a third body, a fourth body, a fifth body, and a sixth body together forming a plurality of IVCs including:
an IVC[ 13 ][ 15 ] ( 20 ) at a jointed connection between the suspended body and the third body;
an IVC[ 13 ][ 17 ] ( 21 ) at a jointed connection between the suspended body and the fifth body;
an IVC[ 15 ][ 16 ] ( 24 ) at a jointed connection between the third body and the fourth body;
an IVC[ 15 ][ 18 ] ( 25 ) at a jointed connection between the third body and the sixth body;
an IVC[ 14 ][ 17 ] ( 23 ) at a jointed connection between the second body and the fifth body; and
an IVC[ 17 ][ 18 ] ( 26 ) at a jointed connection between the fifth body and the sixth body, wherein a line segment defined by the IVC[ 15 ][ 18 ] ( 25 ) and the IVC[ 17 ][ 18 ] ( 26 ) is located at least partially rearward of the IVC[ 15 ][ 16 ] ( 24 ) in at least one portion of a travel of the suspension linkage.
32 . The suspension linkage of claim 31 , wherein the suspension linkage includes a transmission element force vector tangent to respective tops of a driving element and a driven element and the suspension linkage includes an anti-squat curve with a first portion having a positive slope.
33 . The suspension linkage of claim 32 , wherein the anti-squat curve includes a second portion having a negative slope.
34 . The suspension linkage of claim 33 , wherein the negative slope occurs, at least partially, at a vertical wheel travel greater than the vertical wheel travel at which a sag point occurs.
35 . The suspension linkage of claim 31 , wherein a DIVC Ratio DIVC[R] is greater than 1.
36 . The suspension linkage of claim 31 , wherein in an at least partially extended state of the suspension linkage the IVC[ 15 ][ 18 ] ( 25 ) is located rearward of a line segment defined by the IVC[ 15 ][ 16 ] ( 24 ) and the IVC[ 17 ][ 18 ] ( 26 ).
37 . The suspension linkage of claim 31 , further comprising:
a shock assembly, wherein:
a dynamic IVC migration (DIVC) is located at least partially in front of at least a portion of the shock assembly in at least a portion of a travel range of the suspension linkage; and
a DIVC direction variable DIVC[DV] is greater than zero.