US 6,267,096 B1Granted

Three-valve cylinder head system

AssigneeFord Global Technologies, LLC

InventorsJames Kirkland Vallance, Jialin Yang, Richard Walter Anderson

Life of this patent

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Abstract

A three-valve cylinder head system for a direct-injected spark-ignited (DISI) internal combustion engine. Two inlet ports are positioned in opposite quadrants of the cylinder head, with the fuel injector directing fuel spray into a third quadrant and the exhaust port being positioned in the fourth quadrant. A helicoid intake port and an axially directed intake port generate a swirl-type air flow in the piston cylinder without the aid of flow activation devices. The spark plug is positioned centrally adjacent the longitudinal axis of the cylinder bore. The piston has a bowl in its upper surface with an enlarged downstream area and a harbor area adjacent and past the spark plug which allow the swirl-type air flow to mix with the fuel spray and provide an appropriate fuel air mixture at the spark plug.

Claims6

Dependent claims

An in-cylinder injection internal combustion engine having a cylinder bore, a cylinder head with four quadrants, a piston positioned in said cylinder bore and a combustion chamber formed by the cylinder head lower wall and the top surface of the piston, said engine comprising:

a helicoid intake port positioned in a first quadrant of said cylinder head lower wall;
an axially directed intake port positioned in a second quadrant of said cylinder head lower wall;
said helicoid and axially directed intake ports producing a swirl-type air flow in the cylinder;
an exhaust port positioned in a third quadrant of said cylinder head lower wall;
a spark plug positioned in said cylinder head lower wall substantially along the central axis of the cylinder;
and
a fuel injector positioned in said fourth quadrant of said cylinder head lower wall for directing fuel toward said helicoid intake port.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/479,816Filed 7 Jan 2000
Granted: 31 Jul 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

F02B 23/104
With separate admission of air and fuel into cylinder: the injector being placed on a side position of the cylinder
F02B 31/085
Having multiple air inlets: having two inlet valves
F02F 1/4214
Shape or arrangement of intake or exhaust channels in cylinder heads: specially adapted for four or more valves per cylinder
F02B 2023/108
With separate admission of air and fuel into cylinder: swirl flow, i.e. the axis of rotation of the main charge flow motion is vertical