US 11,808,231 B2
Negative pressure operating method
Felix Solla, Bayamón, PR (US)
Assigned to Carmen Rodríguez Báez, Bayamón, PR (US); and Raisa Solla Rodríguez, Bayamón, PR (US)
Filed by Felix Solla, Bayamón, PR (US)
Filed on Nov. 30, 2022, as Appl. No. 18/071,982.
Claims priority of provisional application 63/287,385, filed on Dec. 8, 2021.
Prior Publication US 2023/0175451 A1, Jun. 8, 2023
Int. Cl. F02D 41/36 (2006.01); F02D 41/30 (2006.01); F02D 41/00 (2006.01)
CPC F02D 41/36 (2013.01) [F02D 41/3017 (2013.01); F02D 2041/001 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A negative pressure internal combustion engine having a cylinder, a piston, at least one intake valves, at least one exhaust valves, a connecting rod, a crank shaft wherein a cycle is mapped to a 360-degree motion of said crankshaft by the connection point of said connecting rod to said camshaft and said piston is connected to a connecting rod at an upper connecting rod connection point and a camshaft at a lower connecting rod connection point and said cycle comprises:
a. a first position of said cycle wherein said piston is in the upper position wherein said lower connecting rod connection point is at 0-degree on said camshaft and said inlet valves and said outlet valves are closed;
b. a second position of said cycle wherein said piston moves from said upper position and said lower connecting rod connection point is at 1-degree on said crankshaft and said at least one intake valve is opened and remains open until a third position wherein said lower connecting rod connection point is at 40-degrees on said camshaft and said piston moves from said upper position to a second position allowing a fuel and air mixture to enter said cylinder;
c. a third position of said cycle wherein said piston moves and said lower connecting rod connection point is at 41-degrees on said crankshaft and said at least one intake valve closes;
d. a fourth position of said cycle wherein said piston moves from said third position to said fourth position and said lower connecting rod connection point is at 80-degrees on said crankshaft and an ignition source is applied in said cylinder resulting in combustion of said fuel and air mixture and said piston moves to a fifth position from said fourth position and said lower connecting rod connection point is at 180-degrees on said crankshaft when said piston is at said fifth position and said at least one exhaust valve opens; and
e. a sixth position of said cycle wherein said piston moves from said fifth position and said lower connecting rod connection point is at 0-degrees on said crankshaft and said at least one exhaust valve closes.