초록 ▼

A six-stroke internal combustion engine with reciprocating pistons wherein the six strokes are the admission of air, the first compression accompanied or followed by a possible cooling, a second compression followed by a combustion, the first expansion producing a usable work, the second expansion p

A six-stroke internal combustion engine with reciprocating pistons wherein the six strokes are the admission of air, the first compression accompanied or followed by a possible cooling, a second compression followed by a combustion, the first expansion producing a usable work, the second expansion producing also a usable work and finally the discharge of the combustion gases, this engine, whose combustion is either with spark-ignition (gasoline version) or with auto-ignition (diesel version), will include preferably a multiple of five non-uniform cylinders, and will have an energy efficiency of up to 30% higher than that of a four-stroke internal combustion engine.

대표청구항 ▼

An internal combustion engine comprising at least one cylinder which includes one working chamber having a volume which is rendered variable by displacement inside the cylinder of a piston between a high dead point position and a low dead point position, under effect of pressure forces periodically

An internal combustion engine comprising at least one cylinder which includes one working chamber having a volume which is rendered variable by displacement inside the cylinder of a piston between a high dead point position and a low dead point position, under effect of pressure forces periodically produced inside said chamber; and valve means for admission and discharge of a gaseous fluid associated with said at least one cylinder, the piston and cylinder being connected to a crankshaft of the engine; wherein the engine comprises at least four cylinders disposed to form two pairs, one cylinder of each pair being a high pressure combustion cylinder and the other cylinder being adapted to work as a low pressure admission cylinder, the working chamber of each low pressure admission cylinder being adapted to communicate: (a) with an air intake manifold through at least one admission valve, for producing a precompression of admitted air; (b) with the working chamber of the combustion cylinder of the other pair via communication passageway means for discharging into this combustion cylinder the precompressed air, through at least one discharge valve associated with the admission cylinder and through at least one admission valve associated with the combustion cylinder for producing a compression and combustion at a high pressure of the air to which fuel has been added and a first expansion of combustion gases in said combustion cylinder; (c) with the working chamber of the associated combustion cylinder through at least one transfer valve for transferring the high pressure combustion gases produced in said associated combustion cylinder into the admission cylinder, to produce a second expansion; and (d) with a discharge manifold for the combustion gases which have undergone said second expansion, through at least one discharge valve, said valves being controlled such that the engine operates as a six-stroke internal combustion engine.