US 6,598,577 B1 · Intake valve

Abstract

An intake valve includes a floating seat for attaining variable valve timing. A valve stem is integral with a valve head base. The valve head base includes a region for accommodating a peripheral ring in vertically-actuable relationship. The region of the valve head base for accommodating the peripheral ring includes a vertical locking portion and an upwardly-convex portion that mates with an downwardly-concave portion of the interior of the peripheral ring. A port may be arranged to vent gases at an upwardly-sloping portion of the bottom of the interior of the peripheral ring, thereby preventing instantaneous gas seepage while the peripheral ring is elevated. The vertical locking arrangement is positioned at the inner circumference of the peripheral ring to permit adjustment of peripheral ring travel without adding to the mass of the valve head.

Claims18

Dependent claims

An intake valve for an internal combustion engine comprising, in combination:

a) an elongated valve stem having opposed ends;
b) a valve head base located at one end of and integral with said valve stem;
c) a peripheral ring;
d) said valve head base including a region adapted to receive said peripheral ring in vertically-actuable relationship;
e) said peripheral ring including an inner vertical portion and an outer, inclined valve seat;
f) said region of said valve head base for receiving said peripheral ring having an inner vertical portion in opposed relationship to said inner vertical portion of said peripheral ring;
and
g) said inner vertical portion of said peripheral ring having an inwardly-directed annular flange and said inner vertical portion of said region of said valve head base having an outwardly-directed annular flange for slidably locking said peripheral ring to said valve head base.

5 more elements

An internal combustion engine comprising, in combination:

a) a plurality of combustion chambers, each of said combustion chambers including an associated intake port and exhaust port;
b) each of said combustion chambers including a piston constrained to up and down movements within said chamber;
c) means for coupling the up-and-down movement of a piston within a combustion chamber to that of a piston within the adjacent combustion chamber;
d) a valve linkage coupled to said means, said valve linkage being arranged to control the passage of gases through said intake and exhaust ports;
e) said valve linkage including an intake valve for regulating the flow of gases between said intake port and combustion chamber and an exhaust valve for regulating the passage of gases between said exhaust port and said combustion chamber;
f) said intake valve including (i) an elongated, valve stem having opposed ends;
(ii) a valve head base located at one end of and integral with said valve stem;
(iii) a peripheral ring;
(iv) said valve head base, including a region adapted to receive said peripheral ring in vertically-actuable relationship;
(v) said peripheral ring including an inner vertical portion and an outer, inclined valve seat;
(vi) said region of said valve head base for receiving said peripheral ring having an inner vertical portion in opposed relationship to said inner vertical portion of said peripheral ring;
and (vii) said inner vertical portion of said peripheral ring having an inwardly-directed annular flange and said inner vertical portion of said region of said valve head base having an outwardly-directed annular flange for slidably locking said peripheral ring to said valve head base.

9 more elements

An internal combustion engine comprising, in combination:

a) a plurality of combustion chambers, each of said combustion chambers including an associated intake port and exhaust port;
b) each of said combustion chambers including a piston constrained to up and down movements within said chamber;
c) means for coupling the up-and-down movement of a piston within a combustion chamber to that of a piston within the adjacent combustion chamber;
d) a valve linkage coupled to said means, said valve linkage being arranged to control the passage of gases through said intake and exhaust ports;
e) said valve linkage including an intake valve for regulating the flow of gases between said intake port and combustion chamber and an exhaust valve for regulating the passage of gases between said combustion chamber and said exhaust port;
f) said intake valve including (i) an elongated valve stem having opposed ends;
(ii) a valve head base located at one end of and integral with said valve stem;
(iii) a peripheral ring;. (iv) said valve head base including a region adapted to receive said peripheral ring in vertically-actuable relationship;
(v) said peripheral ring including an inner vertical portion and an outer, inclined valve seat;
(vi) said region of said valve head base including an upwardly-convex surface;
(vii) said peripheral ring including an downwardly-concave base surface;
and (viii) said upwardly-convex and downwardly-concave surfaces being arranged to mate when said peripheral ring is in a non-actuated state.

9 more elements

Dependencies are inferred from the claim text.

Intake valve

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Intake valve

Life of this patent

Abstract

Claims18