Direct injection spark ignition engine

Details Direct injection spark ignition engine Direct injection spark ignition engine

2008-03-25

2008-03-25

Argenbright, T. M (Department: 3747)

Internal-combustion engines

Combustion chamber means having fuel injection only

Combustible mixture stratification means

C123S298000, C123S299000, C123S301000, C123S302000, C123S305000, C123S661000

Reexamination Certificate

active

07347181

ABSTRACT:
A direct injection spark ignition engine comprises a cylinder, a piston, a fuel injector arranged at one side of a center axis of the cylinder for directly injecting fuel into the combustion chamber, and a smoothly continuous lowered recess formed on a top surface of the piston surface. The recess has a first cross section along a first plane including the cylinder center axis and a nozzle end of the injector. The first and second lower contours are smoothly connected with each other through a lowest point of the first cross section. The first lower contour is located at the one side of the cylinder center axis. The second lower contour is at the other side. The first contour has a larger radius than a radius of the second contour. Accordingly, the fuel spray having greater movement energy may impinge the recess at a regulated impinging angle.

REFERENCES:
patent: 6892695 (2005-05-01), Schmitz et al.
patent: 2002/0170531 (2002-11-01), Saito et al.
patent: 2005/0150478 (2005-07-01), Nomura
patent: 102004002296 (2005-08-01), None
patent: 2005-098121 (2005-04-01), None
patent: 2005-256630 (2005-09-01), None

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