Internal-combustion engines – Precombustion and main combustion chambers in series – Piston shape complements precombustion chamber discharge
Patent
1990-04-05
1991-11-26
Dolinar, Andrew M.
Internal-combustion engines
Precombustion and main combustion chambers in series
Piston shape complements precombustion chamber discharge
123262, F02B 1908
Patent
active
050674579
ABSTRACT:
A piston crown is formed with a cavity including a first flame deflecting member which is located amid three flame dispersion zones and which splits burning gases ejected from a transfer port into a first dispersion zone, while the piston is proximate its TDC position, into two flows. The arrangement additionally induces the two flows to assume two essentially symmetrical swirling patterns in second and third dispersion zones. After the piston has descended by a predetermined amount, the burning gases are supplied directly into the second and third zones. Important design considerations which influence the efficiency with which the air in the main combustion chamber include the angle at which the gases are directed toward the piston crown, the location of the first flame splitting member with respect to the site where the flame initially impinges on the first dispersion zone, the angle at which the flame is split and directed toward the second and third zones, the areas of the first, second and zones in which the swirling air patterns are produced and the velocity at which the burning gases flow into the second and third zones.
REFERENCES:
patent: 4662330 (1987-05-01), Shioyama et al.
patent: 4785776 (1988-11-01), Tokura et al.
patent: 4881501 (1989-11-01), Shinzawa et al.
Dolinar Andrew M.
Nissan Motor Company Ltd.
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