Reciprocating engine combustion chamber

Details Reciprocating engine combustion chamber Reciprocating engine combustion chamber

1998-08-18

1999-08-24

Kamen, Noah P.

Internal-combustion engines

Combustion chamber

123667, 1231935, F02B 2308

Patent

active

059412216

ABSTRACT:
A combustion chamber for reciprocating internal combustion engines greatly reduces large quench areas in the combustion chamber, and substantially matches the combustion chamber periphery with the upper edge circumference of the mating cylinder wall, to reduce greatly or substantially eliminate narrow quench areas of relatively high surface area to volume ratios. This increases the average combustion temperature due to the reduction of surface area relative to the volume of the combustion chamber, thereby producing more efficient combustion resulting in a reduction in unburned hydrocarbons during the combustion portion of the cycle. The removal of material to eliminate such large quench areas also slightly enlarges the combustion chamber to reduce the compression ratio, thus reducing the production of oxides of nitrogen during combustion. The combustion chamber is also radiused and smoothed internally, to eliminate rough and sharp edges which may lead to preignition and detonation. While the present disclosure is directed to the incorporation of the present combustion chamber with a General Motors small block V-8 engine, it will be seen that the present chamber is also adaptable to other single and multiple cylinder engines as well. The combustion chamber configuration is especially suited to Otto cycle engines, i. e., four stroke spark ignition engines, having at least one intake and one exhaust valve in the cylinder head. However, the present combustion chamber may also be adapted to other types of normally aspirated or super-charged reciprocating engines (two stroke, Diesel, etc.) as well.

REFERENCES:
patent: 2347097 (1944-04-01), Ginn et al.
patent: 2878800 (1959-03-01), Burrell
patent: 2954023 (1960-09-01), Lampredi
patent: 2991780 (1961-07-01), Brien
patent: 3496923 (1970-02-01), Bashista
patent: 4254621 (1981-03-01), Nagumo
patent: 5257612 (1993-11-01), Smith, Jr. et al.

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