Exhaust recharging of a four cycle internal combustion engine

Patent · Tue Sep 24 04:00:00 EDT 1991

OSTI ID:5661409

Clemmens, W B

This patent describes improvement in a four cycle internal combustion engine comprising at least one combustion chamber and means to expand and contract the combustion chamber, separate intake and exhaust conduit means in fluid communications with the combustion chamber, at least one intake valve in the intake conduit means and at least one exhaust valve in the exhaust conduit means, and means to open and close the valves in timed sequence with the expansion and contraction of the combustion chamber. The improvement comprises expansion means to draw a portion of an intake charge into the exhaust conduit means, downstream reflective means in the exhaust conduit means to cause a compression wave in the exhaust gases to be reflected back upstream to the exhaust valve and timing means to open the exhaust valve when the intake valve has effectively closed and thereby permit the reflected compression wave to force the re-entry of the intake charge in the exhaust conduit means back into the combustion chamber through the open exhaust valve with the reverse flow re-entry intake charge thereby increasing the charge and pressure in the combustion chamber.

• Assignee: NOV; NOV-91-042053; EDB-92-058572
• Patent Number(s): A; US 5050378
• Application Number: PPN: US 7-337917
• OSTI ID: 5661409
• Country of Publication: United States
• Language: English

Related Subjects

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540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
COMBUSTION CHAMBERS
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
EXHAUST SYSTEMS
FLOW REGULATORS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
VALVES