Autonomous urban transport vehicle

An autonomous urban transport vehicle (AUTV) comprising:

• an articulated frame including:
• an upper portion having a main beam, a down tube, a seat tube and a head tube rigidly affixed together;
• a lower portion having a deck and rear wheels attached thereto;
• and
• a biasing mechanism to urge the upper portion toward a center configuration;
• wherein the AUTV is in the center configuration when the down tube and the seat tube define an upright plane that is normal to a line extending through rotational centers of the rear wheels;
• wherein the main beam is connected to the lower portion at hinged joints;
• wherein the main beam is rotatable about a tilt axis;
• wherein the rotation of the main beam about the tilt axis is independent of a camber of the rear wheels;
• wherein the tilt axis is longitudinal with respect to the AUTV;
• wherein the biasing mechanism includes a spring to urge the upper portion toward the center configuration;
• wherein the spring is a leaf spring attached to the lower portion;
• wherein the upper portion includes a left eccentric arm affixed to the main beam to engage the leaf spring and to increasingly energize the leaf spring as a tilt angle increases to the left;
• wherein the upper portion includes a right eccentric arm affixed to the main beam opposite the left eccentric arm to engage the leaf spring and to increasingly energize the leaf spring as the tilt angle increases to the right;
• wherein the left eccentric arm is to disengage the leaf spring when the tilt angle is positive to the right;
• and wherein the right eccentric arm is to disengage the leaf spring when the tilt angle is positive to the left.