Two-valve combustion chamber system

Details Two-valve combustion chamber system Two-valve combustion chamber system

1994-02-03

1995-08-29

Okonsky, David A.

Internal-combustion engines

Combustion chamber

Having squish area

1231935, F02B 2300

Patent

active

054451353

ABSTRACT:
A combustion chamber arrangement for use with internal combustion engines having a piston in an engine block cylinder and a cylinder head secured to the block with a combustion chamber adjacent to the piston surface. One intake valve, one smaller exhaust valve and one centrally located fuel ignition device located in a cylinder head recess are provided for each engine cylinder. The two valves are preferably circular and located on opposite sides of the central ignition device, substantially on a line running through the ignition device. For best results the ratio of the diameter of the intake valve to the diameter of the exhaust valve is at least about 1:3, preferably from about 1.3 to 1.4. Substantially symmetrical squish pads are provided in the cylinder head chamber on adjacent to the row of exhaust valve, ignition device and intake valve. The piston forming the side of the combustion chamber opposite the cylinder head recess preferably has a substantially flat surface with, if desired, a shallow recess which is the mirror image of the recess between the squish pads in the head. This system provides a fast and uniform lean burn, permits use of a high compression ratio and lower octane, unleaded gasoline or other fuels and provides improved thermal efficiency.

REFERENCES:
patent: 4344408 (1982-08-01), Inoue et al.
patent: 4453513 (1984-06-01), Perrin et al.
patent: 4541370 (1985-09-01), Sakai
patent: 4542720 (1985-09-01), Lyndhurst
patent: 4606308 (1986-08-01), Furlong
patent: 4686948 (1987-08-01), Smith et al.
patent: 4686949 (1987-08-01), Glover et al.

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