Four stroke internal combustion engine with inlet air...

Details Four stroke internal combustion engine with inlet air... Four stroke internal combustion engine with inlet air...

2007-09-18

2007-09-18

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Four-cycle

Crankcase compression of air or combustible mixture to be...

C123S07000R

Reexamination Certificate

active

11314159

ABSTRACT:
A four-stroke engine with intake air compression chamber. The intake air compression chamber has a pressure responsive displaceable member therein to compress inlet air passively in response to differential pressure between a sealed crankcase and air in the inlet side of the inlet air compression chamber. The displaceable member is substantially impervious to air, oil, and fuel. When the piston moves away from the intake air compression chamber, decreasing pressure draws the displaceable member toward the crankcase, and the movement of the displaceable member draws into the intake side of the inlet air compression chamber through a one way inlet valve. When the piston moves toward the inlet air compression chamber, fluidwise, compressed gas in the crankcase causes increased pressure on the displaceable member, compressing the inlet air, and directing compressed inlet air out through a one-way outlet valve. Power in a four-stroke engine is increased without the necessity to employ superchargers or turbochargers.

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