Low-speed high-torque hydrostatic powertrain

A camless low-speed high-torque hydrostatic powertrain, comprising:

• one or more hydraulic pumps, each comprising:
• an input crank shaft;
• one or more connecting rings coupled to the input crank shaft with an eccentric interface such that when the input crank shaft is rotating causes the one or more connecting rings to rotate with an eccentricity;
• an annular frame;
• and
• a plurality of hydraulic actuators annularly disposed between the one or more connecting rings and the annular frame, each hydraulic actuator of the plurality of hydraulic actuators having a piston disposed within a corresponding cylinder and pivotally connected to the one or more connecting rings at a corresponding piston connecting region aligned with a piston centerline extending between the piston connecting region and the piston and each corresponding cylinder pivotally connected to the annular frame at a corresponding cylinder connecting region aligned with a cylinder centerline extending between the cylinder connecting region and the cylinder and each hydraulic actuator further including a hydraulic input and a hydraulic output, wherein for each hydraulic actuator the piston centerline and the cylinder centerline are aligned along a common axis during rotation of the one or more connecting rings, and wherein due to said eccentric interface each aligned piston centerline—cylinder centerline of each hydraulic actuator pivotally forms an angular relationship with respect to an aligned piston centerline—cylinder centerline of a neighboring hydraulic actuator of the plurality of hydraulic actuators thus forming a plurality of angular relationships between each two neighboring hydraulic actuators, wherein each member of said plurality of angular relationships continuously varies as the input crank shaft rotates;
• the eccentricity between the one or more connecting rings and the input crank shaft causes the plurality of hydraulic actuators to i) pump hydraulic fluid out of the hydraulic output, or ii) cause suction of hydraulic fluid from the hydraulic input;
• one or more hydraulic motors hydraulically coupled to the hydraulic outputs of the one or more hydraulic pumps;
• and
• one or more generators coupled to the one or more hydraulic motors and configured to generate electrical power.