20140338524 | NON-COMBUSTION PNEUMATIC-VACUUM ENGINE - An engine includes cylinders using pressure differences to motivate the pistons. Each cylinder has a first outlet in its' first end, the first outlet being coupled to a vacuum chamber via a first valve and a first conduit, a second outlet in the cylinder's first end, the second outlet being coupled to an air pressure chamber via a second valve and a second conduit, a third outlet in the cylinder's second end, the third outlet being coupled to the vacuum chamber via a third valve and a third conduit, and a fourth outlet in the cylinder's second end, the fourth outlet being coupled to the air pressure chamber via a fourth valve and a fourth conduit. The valves are electrically controlled by a processor. When the first and fourth valves are turned on, the piston is pulled forward by a pressure difference created by the vacuum chamber and is at the same time pushed forward by a pressure difference created by the air pressure chamber. When the piston reaches its maximum length, the first and fourth valves are turned off, and the second and third valves are turned on, and the piston is pulled backward by a pressure difference created by the vacuum chamber and is at the same time pushed backward by a pressure difference created by the air pressure chamber. When the piston reaches its minimum length, the second and third valves are turned off, and the first and fourth valves are turned on. | 11-20-2014 |