Hydraulic limited differential slip

A positive displacement pump for hydraulic limited differential in a vehicle, comprises:

• a first external gear and a second external gear juxtaposed inside a casing, wherein one or more outer teeth sections of the external gears are tangential to the casing;
• a crown wheel is configured to encompass the casing and takes a receiving force from a pinion to drive axle shafts of the vehicle via the positive displacement pump, wherein the axle shafts are configured to couple the first external gear and the second external gear;
• a pair of side gears mounted on a shaft extending from the first external gear and the second external gear and a pair of support gears are mounted on the axle shafts of the vehicle, wherein the support gears are coupled to the first external gear and the second external gear for concentric alignment with the crown wheel;
• wherein the casing is filled with a fluid via an opening and sealed using a plug member on both sides to define a fluid tight sealing configuration;
• wherein a clockwise rotation of the first external gear is configured to drive the second external gear in counter clockwise direction in the casing to allow movement of the fluid inside the casing;
• and
• a high-pressure countersink and a low-pressure countersink are created on all sides of the first external gear and the second external gear respectively, wherein movement of the fluid in the casing via a channel from the high-pressure countersink to the low-pressure countersink creates a pressure difference to circulate the fluid internally via permitted gaps and slips to control a differential slip.