Power plants – Internal combustion engine with treatment or handling of... – Pulsed – timed – tuned or resonating exhaust
Patent
1998-11-12
2000-12-12
Denion, Thomas
Power plants
Internal combustion engine with treatment or handling of...
Pulsed, timed, tuned or resonating exhaust
60312, 60314, 60324, 60322, 181237, 123 65P, 123 65PE, 123 65EM, F02B 2702
Patent
active
061582158
ABSTRACT:
A variable exhaust resonance chamber valve system for internal combustion engine. The engine includes a cylinder having an exhaust port with an axial extent along the axis of the cylinder structure. An exhaust passage having a resonance port extends from the exhaust port to exhaust the engine. A resonance chamber extends from the resonance port and communicates with the exhaust passage through the resonance port. A port valve is adjustable between a second position, in which the port valve exposes the exhaust port throughout its axial extent and occludes the resonance port, and a first position, in which the port valve restricts the axial extent of the exhaust port and exposes the resonance port. A valve control module is connected to the port valve and functions to adjust the port valve between first and second positions in response to engine conditions. At low speeds and low output conditions, the valve is in its first position. At higher speeds and under higher output conditions, the valve control module moves the valve to its second position.
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Bosch John Bradley
Fredrickson Richard
Hedlund Jan
Ness Kevin D.
Denion Thomas
Polaris Industries Inc.
Tran Binh
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