Internal-combustion engines – Precombustion and main combustion chambers in series – Chamber temperature control means
Patent
1990-10-01
1992-03-17
Argenbright, Tony M.
Internal-combustion engines
Precombustion and main combustion chambers in series
Chamber temperature control means
123261, 123270, 123289, F02B 1904
Patent
active
050958720
ABSTRACT:
An alcohol engine with combustion cavity of this invention includes combustion cavity blocks for constituting combustion cavities of a heat-insulating structure, disposed in a cylinder head, communication ports of a heat-insulating structure for communication between main combustion chambers and the combustion cavities and fuel injection nozzles each including a nozzle main body extending to the center portion of the combustion cavity and multi-injection injection ports formed around the tip of the nozzle main body and opening in such a manner as to face the center inner peripheral wall surface of the combustion cavity. The combustion cavity blocks comprises a thin ceramic inner wall member, a heat-insulating member and a metallic outer cylinder, raises quickly the wall temperature of the combustion cavity at the time of a low temperature to supply sufficient vaporization energy to an alcohol fuel, cools the wall surface by the alcohol fuel at the time of a high temperature to limit the rise of the temperature of the combustion cavity and performs main combustion in a combustion cavity to restrict the formation of NOx. Further, a protuberance is formed at each piston head portion and closes the center portion of each communication port at the time of the rise of the piston so as to define a ring-like passage. The injection flow from this ring-like passage promotes mixing between the fuel and air.
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Patent Abstract of Japan, vol. 14, No. 209 (M-968) (4152) 27 Apr. 1990, & JP-A-2 45612 (Isuzu) 15 Feb. 1990, "Heat Insulation Engine".
Internal Combustion Engine, vol. 27, No. 345, Jul. 1988, Nippon Clean Lab. Co., Osaka; Strafied Charge Engine by Imprigement of Fuel Jet (Oska).
Argenbright Tony M.
Isuzu Motors Ltd
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