Internal-combustion engines – Charge forming device – Supercharger
Reexamination Certificate
2005-04-05
2005-04-05
Trieu, Thai-Ba (Department: 3748)
Internal-combustion engines
Charge forming device
Supercharger
C418S015000, C418S206200, C418S201200, C251S209000, C137S625320
Reexamination Certificate
active
06874486
ABSTRACT:
A supercharger includes multiple back flow ports which are controlled by valves. The valves regulate the timing and area for back flow of pressurized outlet air into the rotor chambers. The back flow air tends to equalize air pressure in the chambers prior to their exhausting into the outlet and thereby reduces flow back noise. The multiple ports are opened selectively or sequentially to provide noise control with improved efficiency at varying speeds.
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Bittner Roxann M.
Prior Gregory P.
Barr, Jr. Karl F.
General Motors Corporation
Trieu Thai-Ba
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