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US 4,046,111 AGranted
Combustion chamber of internal combustion engine
AssigneeToyota Jidosha Kogyo Kabushiki Kaisha
InventorTetsuro Nagano
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AssigneeToyota Jidosha Kogyo Kabushiki Kaisha
InventorTetsuro Nagano
Estimating the term…
A combustion chamber structure for an internal combustion engine, which combustion chamber structure includes a main combustion chamber and a separate auxiliary combustion chamber. The main combustion chamber is supplied solely with air by a conventional intake valve. A passage interconnects the main and auxiliary combustion chambers for permitting air to flow into the auxiliary combustion chamber during the compression stroke of the piston. The auxiliary combustion chamber has a fuel-injection nozzle and a spark ignition plug associated therewith. An obstacle, such as a spherical or cylindrical member, is positioned within but spaced from the sidewall of the auxiliary combustion chamber, whereby a circular flow pattern is created within the auxiliary combustion chamber which improves the fuel atomization and the uniformity of the fuel-air mixture. The spark plug is positioned adjacent the passage which interconnects the chambers so as to result in proper stratified combustion within the main chamber, while also minimizing noise.
In a combustion chamber structure for an internal combustion engine, comprising a main combustion chamber supplied solely with air, an auxiliary combustion chamber having a fuel injection nozzle and a spark ignition device communicating therewith, a transfer passage which interconnects said main and auxiliary combustion chambers and which is substantially tangential to said auxiliary combustion chamber at its point of communication, and an obstacle positioned in said auxiliary combustion chamber so that said auxiliary combustion chamber is shaped as an annulus, said obstacle having a smooth and continuous rounded outer surface, the improvement wherein said spark ignition device communicates directly with said auxiliary combustion chamber, wherein the distance between the interior wall of the auxiliary combustion chamber and the outer surface of the obstacle varies along the periphery of the obstacle, and wherein said spark ignition device is positioned where said distance is large.
In a combustion chamber structure for an internal combustion engine, comprising a main combustion chamber supplied solely with air, an auxiliary combustion chamber having a fuel injection nozzle and a spark ignition device communicating therewith, a transfer passage which interconnects said main and auxiliary combustion chambers and which is substantially tangential to said auxiliary combustion chamber at its point of communication, and an obstacle positioned in said auxiliary combustion chamber so that said auxiliary combustion chamber is shaped as an annulus, said obstacle having a smooth and continuous rounded outer surface, the improvement wherein said spark ignition device communicates directly with said auxiliary combustion chamber, wherein the distance between the interior wall of the auxiliary combustion chamber and the outer surface of the obstacle varies along the periphery of the obstacle, and wherein said fuel injection nozzle is positioned where said distance is small.
Dependencies are inferred from the claim text.