Supercharged internal combustion engine
OwnerCraig N. Hansen, Paul C. Crossinventors
Life of this patent
Estimating the term…
Abstract
A supercharged internal combustion engine is drivably connected to a variable displacement supercharger operable to continuously supply varying amounts of an air mass to the engine in response to the varying power requirements of the engine. The variable displacement capability eliminates blowdown losses of fixed displacement superchargers and substantially reduces the need for throttling of the intake air. The device also presents an air-motoring mode that can recover a portion of the engine throttling losses as positive power returned to the engine crankshaft when the engine intake manifold is below atmospheric pressure.
Claims13
A supercharged internal combustion engine comprising:
- an internal combustion engine having at least one combustion chamber for accommodating an air mass and fuel,
- a supercharger operable to supply varying amounts of an air mass to the internal combustion engine in response to varying power requirements of the internal combustion engine,
- a power transmission drivably connecting the supercharger to the internal combustion engine for operating the supercharger in response to varying speed of the internal combustion engine,
- said supercharger including
- a housing having an internal chamber,
- a male rotor rotatably located in the internal chamber of the housing,
- a female rotor rotatably located in the internal chamber of the housing,
- said male rotor having helical vanes, said helical vanes having proximal ends and distal ends, and
- passages in the proximal ends of the vanes of the male rotor for venting an air mass from adjacent the male rotor.
A supercharger rotor comprising:
- a rotor body having a first end wall and a second end wall opposite the first end wall,
- helical vanes joined to the rotor body and located from the first end wall to the second end wall of the rotor body,
- each of the helical vanes has an air mass inlet end and an air mass outlet end, and
- passages in the air mass inlet end of each helical vanes for venting air mass from adjacent the first end wall of the rotor body.
Dependencies are inferred from the claim text.