T-scavenged opposed piston engine
AssigneePinnacle Engines, Inc.
InventorClayton NABER
Life of this patent
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Abstract
A novel two-stroke opposed piston engine with sleeve valves and T-scavenging breathing is provided. The two-stroke opposed piston engine has a unique uni-flow scavenging breathing that can deliver higher power density than the traditional uniflow-scavenging two-stroke opposed piston engine. Furthermore, a method of operating a two-stroke opposed piston engine is provided. The novel opposed piston engine can be a hybrid engine with one or more electric machines.
Claims20
A two-stroke opposed piston engine, comprising:
- a cylindrical chamber;
- a first piston and a second piston slidably disposed in the cylindrical chamber, surfaces of the first piston and the second piston and walls of the cylindrical chamber defining an internal combustion volume;
- a first intake port and a second intake port in the cylindrical chamber to allow fresh air flow into the cylindrical chamber during a scavenging process;
- and
- at least one exhaust valve controlled by an exhaust camshaft, the exhaust valve is configured to allow exhaust gas to exit the internal combustion volume during the scavenging process.
A two-stroke opposed piston engine, comprising:
- a cylindrical chamber;
- a first piston and a second piston slidably disposed in the cylindrical chamber, surfaces of the first piston and the second piston and walls of the cylindrical chamber defining an internal combustion volume;
- at least one intake port in the cylindrical chamber to allow fresh air flow into the cylindrical chamber during a scavenging process;
- and
- at least one exhaust valve controlled by an exhaust camshaft, the exhaust valve is configured to allow exhaust gas to exit the internal combustion volume during the scavenging process.
A method of operating a two-stroke opposed piston engine having a first piston and a second piston slidably disposed in a cylindrical chamber, comprising:
- enabling combustion of a mixture of air and fuel in the cylindrical chamber;
- enabling, during a blowdown process, exhaust gas from the combustion to exit the cylindrical chamber through at least one exhaust valve controlled by an exhaust camshaft;
- and
- enabling, during a scavenging process, fresh air to enter the cylindrical chamber through two conversely disposed intake ports, wherein the fresh air expels remaining exhaust gas existing through the at least one exhaust valve, from opposing directions, substantially toward a middle-plane of the cylindrical chamber.
(canceled)
Dependencies are inferred from the claim text.