Built-in vehicle jack

A hydraulic vehicle jack system built into a frame of a vehicle, comprising:

• at least one separate lifting mechanism attached to the frame of the vehicle, each lifting mechanism being disposed near a wheel of the vehicle and including:
• a hydraulic arm bar frame attached to the frame of the vehicle and extending parallel to a longitudinal axis of the frame of the vehicle;
• a first jack arm and a first pivot joint, the first pivot joint pivotably connecting one end of the first jack arm to the hydraulic arm bar frame;
• a second jack arm, a second pivot joint, and a third pivot joint, the second pivot joint pivotably connecting one end of the second jack arm to the hydraulic arm bar frame, and the third pivot joint pivotably connecting another end of the second jack arm to another end of the first jack arm, wherein the second jack arm includes a jack extension case and a jack extension bar that is slidably disposed within the jack extension case, the jack extension bar extending from and withdrawing within the jack extension case in response to increasing and decreasing hydraulic pressure, respectively, wherein the jack extension bar extends from the jack extension case in response to increasing hydraulic pressure, causing the first jack arm to pivot toward the ground and lift the nearby wheel off of the ground;
• at least one hydraulic pump;
• at least one hydraulic line hydraulically coupling the at least one pump and the jack extension case;
• and
• a control system to control the at least one hydraulic pump to increase the pressure along the at least one hydraulic line and control pressure in the jack extension case;
• wherein a distance between the first pivot joint and the second pivot joint is fixed;
• wherein the distance is less than a sum of a length of the first arm bar and a length of the second arm bar when the jack extension bar is fully extended from the jack extension case.