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In a hydrostatic continuously variable transmission comprising a swashplate type hydraulic pump having a pump swashplate and annularly arranged pump plungers whose suction and discharge strokes are provided by the pump swashplate, a swashplate type hydraulic motor having a motor swashplate and annul

In a hydrostatic continuously variable transmission comprising a swashplate type hydraulic pump having a pump swashplate and annularly arranged pump plungers whose suction and discharge strokes are provided by the pump swashplate, a swashplate type hydraulic motor having a motor swashplate and annularly arranged motor plungers whose expansion and shrinkage strokes are provided by the motor swashplate, and a hydraulic closed circuit formed between the hydraulic pump and motor, the middle point of a discharge region of the hydraulic pump is angularly delayed at a given angle in a direction of rotation of the hydraulic pump relative to a tilting axis of the pump swashplate, and/or the middle, point of an expansion region of the hydraulic motor is angularly advanced at a given angle in a direction of rotation of the hydraulic motor relative to a tilting axis of the motor swashplate. Further, a suction region of the hydraulic pump is set at an angle larger than that of a discharge region thereof, and/or a shrinkage region of the hydraulic motor is set at an angle larger than that of an expansion region thereof.

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A hydrostatic continuously variable transmission comprising a swashplate type hydraulic pump having a pump swashplate and annularly arranged pump plungers whose suction and discharge strokes are provided by said pump swashplate, a swashplate type hydraulic motor having a motor swashplate and annular

A hydrostatic continuously variable transmission comprising a swashplate type hydraulic pump having a pump swashplate and annularly arranged pump plungers whose suction and discharge strokes are provided by said pump swashplate, a swashplate type hydraulic motor having a motor swashplate and annularly arranged motor plungers whose expansion and shrinkage strokes are provided by said motor swashplate, and a hydraulic closed circuit formed between said hydraulic pump and said hydraulic motor, said hydrostatic continuously variable transmission having at least one of a relationship that a middle point of a discharge region of said hydraulic pump is angularly delayed at a given angle in a direction of rotation of said hydraulic pump relative to a tilting axis of the pump swashplate and a relationship that a middle point of an expansion region of said hydraulic motor is angularly advanced at a given angle in a direction of rotation of said hydraulic motor relative to a tilting axis of said motor swashplate, wherein said hydrostatic continuously variable transmission has at least one of a relationship that a suction region of said hydraulic pump is set at an angle larger than that of said discharge region thereof and a relationship that a shrinkage region of said hydraulic motor is set at an angle larger than that of said expansion region of said motor.