Cylinder for a crankcase scavenged internal combustion engine

Details Cylinder for a crankcase scavenged internal combustion engine Cylinder for a crankcase scavenged internal combustion engine

2003-12-19

2008-08-26

Kamen, Noah (Department: 3747)

Internal-combustion engines

Two-cycle

Rear compression

C123S0730AE

Reexamination Certificate

active

07415949

ABSTRACT:
A cylinder (1) for a crankcase scavenged two-stroke engine, comprising a cylinder bore (2) with centre line (12) and on opposite sides of the cylinder located closed transfer ducts (3, 3′), which cylinder (1) has an underside (4) essentially perpendicular towards the cylinder bore (2), intended to be connected to a crankcase (5) in a parting plane (A), and besides an inlet (8) for air/fuel mixture, the cylinder is provided with at least one inlet (9, 9′) for additional air to the combustion chamber, which inlet for additional air runs through a cylinder wall (11) and via a recess in the piston and a transfer port (6, 6′) leads down into the transfer ducts (3, 3′). Especially the transfer ducts (3,3′) each have an upper section (3a, 3a′) leading from the transfer port (6, 6′) and in a tangential direction in relation to the cylinder bore (2) and is followed by an essentially right angled bend (3b, 3b′) leading into a lower section (3c, 3c′) leading into the parting plane (A), and at least the right-angled bend of each transfer duct is located on opposite sides of an exhaust duct (7) and during at least a part of the right-angled bend (3b, 3b′) the transfer ducts approach each other.

REFERENCES:
patent: 6712029 (2004-03-01), Andersson et al.
patent: 7082910 (2006-08-01), Carlsson et al.
patent: 2002/0043227 (2002-04-01), Carlsson et al.
patent: 2003/0106507 (2003-06-01), Olander
patent: WO 00/43660 (2000-07-01), None

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