Brake flush machine with ordered cylinder extraction

An automatic brake fluid exchange machine comprising:

• a used fluid tank;
• a new fluid tank;
• a fluid flow controlling means connectable to four secondary brake cylinders corresponding to a front driver's side wheel, a front passenger's side wheel, a rear driver's side wheel, and a rear passenger's side wheel;
• a suction pump connecting the fluid flow controlling means to said used fluid tank for draining used brake fluid from said four secondary brake cylinders;
• a pressure pump connecting the new fluid tank to the master cylinder;
• and
• means for sequentially actuating said fluid flow controlling means that couple the four secondary brake cylinders with the suction pump, where a valve connected to the rear passenger's side cylinder is first opened and then closed, followed by opening and closing of a valve connected to the rear driver's side cylinder, followed by the opening and closing of a valve connected to the front passenger's side cylinder, and then opening and closing of a valve connected to the front driver's side cylinder, where each successive valve is opened for a shorter period than the preceding valve.

A method for simultaneously removing used brake fluid from a vehicle's braking system and supplying fresh braking fluid to the same system comprising:

• pressurizing a pressure pump connecting a supply of fresh braking fluid to a master cylinder;
• actuating a vacuum pump connecting a multi-valve solenoid to individual brake cylinders of said braking system;
• selecting a vehicle drive type;
• actuating said solenoid to remove braking fluid from a braking cylinder having a largest distance between the solenoid and the braking cylinder for a timed period while pumping fresh fluid in an equal amount to said master cylinder through said pressure pump;
• and
• actuating said solenoid to remove braking fluid from each successive cylinder beginning with a next largest distance between the solenoid and said braking cylinder and continuing to a cylinder with the shortest distance between the solenoid and said braking cylinder, each for a timed period, where the timed period for the largest distance is greater than a timed period for the shortest distance.