Abstract

An engine system and method of operation therefor are provided. The system is a two-stroke internal combustion engine having an exhaust valve assembly that controls the exhaust cycle relative to crankshaft timing. The exhaust valve assembly is positioned between exhaust port and an exhaust pipe. The exhaust valve assembly comprises a rotary exhaust valve and valve phasing assembly. The rotary exhaust valve comprises a valve body defining a valve void therethrough. The use of the rotary exhaust valve allows for alteration or calibration of the fixed time and location at which the intake port and exhaust port are opened and closed by the piston with respect to the respective engine cycle. Notably, while still uncovered by the piston, the exhaust port may be closed due to full misalignment of the valve void and the exhaust port, while the intake port remains open, allowing for cylinder charging.

IPC Classes  ?

• F02D 13/02 - Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
• F01L 7/00 - Rotary or oscillatory slide-valve gear or valve arrangements
• F02B 37/16 - Control of the pumps by bypassing charging air
• F02B 75/02 - Engines characterised by their cycles, e.g. six-stroke
• F02D 41/00 - Electrical control of supply of combustible mixture or its constituents
• F02M 61/14 - Arrangements of injectors with respect to enginesMounting of injectors

Abstract

An engine system and method of operation therefor are provided. The system is a two-stroke internal combustion engine having an exhaust valve assembly that controls the exhaust cycle relative to crankshaft timing. The exhaust valve assembly is positioned between exhaust port and an exhaust pipe. The exhaust valve assembly comprises a rotary exhaust valve and valve phasing assembly. The rotary exhaust valve comprises a valve body defining a valve void therethrough. The use of the rotary exhaust valve allows for alteration or calibration of the fixed time and location at which the intake port and exhaust port are opened and closed by the piston with respect to the respective engine cycle. Notably, while still uncovered by the piston, the exhaust port may be closed due to full misalignment of the valve void and the exhaust port, while the intake port remains open, allowing for cylinder charging.

IPC Classes  ?

• F02D 13/02 - Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
• F01L 7/12 - Rotary or oscillatory slide-valve gear or valve arrangements specially for two-stroke engines
• F02B 75/02 - Engines characterised by their cycles, e.g. six-stroke
• F02F 1/22 - Other cylinders characterised by having ports in cylinder wall for scavenging or charging

Abstract

An engine system and method of operation therefor are provided. The system is a two-stroke internal combustion engine having an exhaust valve assembly that controls the exhaust cycle relative to crankshaft timing. The exhaust valve assembly is positioned between exhaust port and an exhaust pipe. The exhaust valve assembly comprises a rotary exhaust valve and valve phasing assembly. The rotary exhaust valve comprises a valve body defining a valve void therethrough. The use of the rotary exhaust valve allows for alteration or calibration of the fixed time and location at which the intake port and exhaust port are opened and closed by the piston with respect to the respective engine cycle. Notably, while still uncovered by the piston, the exhaust port may be closed due to full misalignment of the valve void and the exhaust port, while the intake port remains open, allowing for cylinder charging.

IPC Classes  ?

• F02D 13/02 - Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
• F01L 7/00 - Rotary or oscillatory slide-valve gear or valve arrangements
• F02B 37/16 - Control of the pumps by bypassing charging air
• F02D 41/00 - Electrical control of supply of combustible mixture or its constituents
• F02M 61/14 - Arrangements of injectors with respect to enginesMounting of injectors
• F02B 75/02 - Engines characterised by their cycles, e.g. six-stroke