Four stroke engine with a fuel saving sleeve

Details Four stroke engine with a fuel saving sleeve Four stroke engine with a fuel saving sleeve

2007-04-05

2008-10-21

Cronin, Stephen K (Department: 3747)

Internal-combustion engines

Adjustable combustion chamber

Piston in head adjusted

C123S0780AA, C123S193200

Reexamination Certificate

active

07438028

ABSTRACT:
A four stroke engine with piston strokes all of equal length whereby the intake stroke displacement and the compression stroke displacement are smaller than the expansion stroke displacement and the exhaust stroke displacement. This is accomplished using the fuel saving sleeve that has a projection on one end. A magnetic force is used to keep the fuel saving sleeve at the top of the engine cylinder during the intake and compression strokes. This makes the sleeve act as an air displacer during the intake and compression strokes. The projection transfers the pressure of burning gases on the sleeve to the piston during the expansion stroke. It also transfers force from the piston to the sleeve during the exhaust stroke. This makes the sleeve act as an enlargement of the piston during the expansion and exhaust strokes.

REFERENCES:
patent: 1809585 (1931-06-01), Edwards
patent: 2451271 (1948-10-01), Balster
patent: 4164916 (1979-08-01), Wuerfel
patent: 6216653 (2001-04-01), Hara et al.
patent: 7159544 (2007-01-01), Studdert et al.

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