Adiabatic internal combustion engine

F - Mech Eng,Light,Heat,Weapons – 02 – F

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F02F 1/00 (2006.01) F02B 23/00 (2006.01) F02B 55/02 (2006.01) F02B 55/08 (2006.01) F02F 1/24 (2006.01) F02F 3/00 (2006.01) F02F 3/10 (2006.01)

Patent

CA 2352047

An adiabatic internal combustion engine capable of increasing a thermal efficiency remarkably as compared with conventional internal combustion engines, capable of easily realizing a spark ignition adiabatic engine represented by gasoline engines and rotary diesel engines, and also capable of realizing an adiabatic engine relatively low in cost and reliable in durability, wherein a cooling loss is lowered or eliminated by insulating the combustion chamber of a reciprocating engine or a rotary engine so as to reduce fuel consumption accordingly and increase fuel economy more than conventional engines, heat resisting material is installed on the surface of the combustion chamber and insulating material is installed between the heat resisting material and an engine base material (aluminum alloy or iron) so as to enable a low cost and durable insulation, whereby the temperature of a combustion chamber wall is not increased to a high temperature (temperature beyond 850 ~C) that may cause premature ignition due to insulation by providing a difference between a compression ratio and an expansion ratio so as to make an expansion ratio larger than a compression ratio or by thinning a densest air-fuel ratio or limiting the maximum amount of intake air.

L'invention concerne un moteur à combustion interne adiabatique pouvant augmenter notablement l'efficacité thermique par comparaison avec un moteur à combustion interne classique. Le moteur à combustion interne de l'invention peut facilement donner un moteur à explosion adiabatique (du type moteur à essence ou moteur diesel rotatif) relativement bon marché et durable. La perte de refroidissement est réduite ou éliminée par isolation de la chambre à combustion d'un moteur alternatif ou d'u moteur rotatif, ce qui diminue d'autant la consommation de carburant et permet une économie d'essence plus importante que pour les moteurs classiques. Un matériau résistant à la chaleur est disposé sur la surface de la chambre à combustion et un matériau isolant est disposé entre le matériau résistant à la chaleur et un matériau de base du moteur (alliage d'aluminium ou fer) pour conférer une isolation bon marché et durable, et empêcher une élévation de la température (au-delà de 850 ·C) d'une paroi de la chambre à combustion pouvant provoquer un allumage prématuré dû à l'isolation. Pour ce faire, on établit entre un taux de compression et un taux de dilatation une différence telle que le taux de dilatation soit supérieur au taux de compression, ou on diminue un rapport d'un mélange air-carburant plus dense ou la quantité maximale de prise d'air.

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