Mazda Motor Corporation

Yoshitada Toyoshima

Masaya Hiramatsu

Shigeki Furutani

Susumu Sano

Kazuhiro Okuyama

Naoki Ikeda

Toshiaki Aoki

Atsushi Tsuge

Yoshiharu Takahashi

Hiromune Ohhashi

A vehicle suspension system smoothly changes a vehicle posture with respect to a steering force and a steering angle by minimizing a kinematic roll at an initial turning stage, thereby allowing a driver to obtain the sensation of maneuvering the vehicle well. The suspension system includes a front suspension having geometry satisfying that a caster angle is +3&#xb0; to +5&#xb0;, a caster trail is +20 to +30 mm, an intersection point between a kingpin axis and ground is located on an inner side in a vehicle width direction of a center of a tire contact patch, and an anhedral angle of a lower arm is +2.8&#xb0; to +7.2&#xb0;. A rear suspension includes five links and has geometry satisfying that a virtual kingpin axis extends near the center of a tire contact patch of a rear wheel assembly and extends vertically at &#x2212;2&#xb0; to 0&#xb0;.

Vehicle suspension system

In a front suspension device for an automotive vehicle, in which wheel support members of right and left front wheels are coupled with each other via a steering unit, outer ends of two lower arms are pivotally attached to the wheel support members, and inner ends of two lower arms are pivotally attached to a vehicle body via a resilient member, there are provided a damping device equipped with a coil spring and attached to one of the two lower arms at its lower end and to the vehicle body at its upper end respectively, and a suppression (rotational torque absorption) device for suppressing a toe-change of the front wheels caused by a rotational torque applied according to extension and contraction of the coil spring of the damping device.

Front suspension device for automotive vehicle

Growing community of inventors

Hiroshima, Japan

Yoshitada Toyoshima