Back to results
US 7,882,631 B2Granted
Methods for controlling valves of an internal combustion engine, devices for controlling the valves, and engines employing the methods
OwnerAnthony Nicholas Zurninventor
Life of this patent
Estimating the term…
Abstract
Methods for improving the efficiency of internal combustion engines are disclosed. In one embodiment, a method of improving the efficiency of an internal combustion comprises controlling the motion of an exhaust valve associated with a cylinder of the internal combustion engine. Camshafts and internal combustion engines configured for performing methods of the instant invention are also disclosed.
Claims8
A method of combusting fuel in an internal combustion engine, the method comprising:
- providing an internal combustion engine having a predetermined compression pressure;
- remanufacturing the internal combustion engine by enlarging a piston, shaving a head or a combination thereof, thus decreasing a volume of the cylinder;
- introducing air into a cylinder of the remanufactured internal combustion engine;
- releasing a portion of the air from the cylinder during a compression stroke of the remanufactured internal combustion engine;
- compressing a remaining portion of the air in the cylinder such that a compression pressure of the remaining portion of the compressed air in the cylinder of the remanufactured internal combustion engine is approximately the same as the predetermined compression pressure of the internal combustion engine
- introducing fuel into the cylinder;
- igniting the remaining portion of the compressed air and the fuel in the cylinder;
- and
- exhausting the ignited fuel-air mixture from the cylinder.
6 more elements
A method of configuring an internal combustion engine, comprising:
- providing an engine having a predetermined compression ratio;
- remanufacturing the engine by enlarging a piston, shaving a head or a combination thereof, thus decreasing a volume of the cylinder;
- and
- configuring a camshaft to release a portion of air introduced into the cylinder during a compression stroke and compress a remaining portion of the air in the cylinder during the compression stroke, such that a compression ratio of the remanufactured engine is the same as the predetermined compression ratio.
1 more element
Dependencies are inferred from the claim text.