摘要:
An internal combustion engine comprises a cylinder of stepped configuration having a working portion (21) and a pumping portion (22) and a piston of stepped configuration having a working portion (31) and a pumping portion (32), the working (21, 31) and pumping portions (22, 32) respectively co-operating to define a combustion chamber (35) and a pumping chamber (37) each of which varies in volume upon reciprocation of the piston in the cylinder. Air is admitted to the pumping chamber (37) through a duct (43) from where, on volume reduction thereof, it passes via a plurality of passages (49) and a one-way valve (50) into a transfer chamber (47). On volume expansion of the combustion chamber (35), air in chamber (47) is discharged therefrom via a plurality of passages (55), common discharge port (57) and valve (59) to scavenge the combustion chamber (35) and provide combustion air. The valve (59) may be self-acting or operated by a crankshat controlled push-rod. A delivery pump (63) operated pneumatically under the influence of the pumping chamber (37) to deliver fuel or a combustible mixture to inlet passage (76) is also disclosed.
摘要:
Le dispositif comprend deux chambres (1, 11) composées chacune d'un cylindre (2, 12) dans lequel glisse un piston (3, 13). Les axes de révolution des cylindres (2, 12) et les pistons (3,13) de ces deux chambres (1, 11) sont confondus. Les deux pistons (3, 13) des deux chambres sont solidaires et transmettent leur mouvement linéaire alternatif au système de transformation de mouvement du moteur par l'intermédiaire d'une tige rigide (10). Cela permet de dissocier les phases du cycle des moteurs à combustion interne auxquels elle s'applique de manière à obtenir plus de puissance et un meilleur rendement.
摘要:
When considering the main types of commercial engines available on the market, whether two-stroke, four-stroke or rotary-type, it is found that, and this is commonplace, said engines are highly polluting. The main reason for this lies in the difficulty to manufacture worn gas filters which would not induce restriction. However, that difficulty can be overcome by producing an engine which is itself capable of sustaining a high rate of restriction. The technical solutions disclosed by the invention present several embodiments enabling the engine to tolerate a higher level of restriction and consequently a more dense filtering. These various technical embodiments provide for a novel path for fresh gases through the engine. The invention provides a solution, which is not primarily concerned with fresh gas supply but rather with waste gas absorption, followed by their subsequent evacuation constituting the first stroke of said engine. Indeed, the waste gases are evacuated outwards by two successive steps: the gases are evacuated outwards by pumping, and said discharge generates, in turn, a vacuum which sucks in the burnt fresh gases which in turn finally suck in the fresh gases. Said techniques have the further advantage of producing two stroke engines powered with gas only, and consequently cleaner and more efficient.
摘要:
A stepped piston engine comprises first (10), second (11) and third (12) stepped cylinders, each cylinder (10, 11, 12) having a larger diameter pumping part (10p, 11p, 12p), and a smaller diameter working part (10w, 11w, 12w), and a piston (13, 14, 15) slidable in the cylinder, each piston (13, 14, 15) being coupled to an output shaft (16) of the engine, first transfer passage means (20) to transfer the precompressed charge from the larger diameter pumping part (10p) of the first cylinder (10) to the smaller diameter working part (11w) of the second cylinder (11), second transfer passage means (21), to transfer precompressed charge from the larger diameter pumping part (11p) of the second cylinder (11) to the smaller diameter working part (124) of the third cylinder (12), and third transfer passage means (22) to transfer precompressed charge from the larger diameter pumping part (12p) of the third cylinder (12) to the smaller diameter working part (10w) of the first cylinder (10).
摘要:
The present invention refers to a double-acting, single-cylinder, explosion engine whose peculiarity is to be provided with auxiliary components which permit to optimize the inlet stroke because such auxiliary components are arranged in a way that the gases to be burnt are not inlet by the piston. Such gases are inlet by the auxiliary components. In general the present engine (1) comprises a cylinder (2) in which a piston (3) may run. The median axis of the piston (3) is interested by a through-shaft which is fixed and coaxial to the piston itself. The shaft is divided in two half-shafts (4, 5) having the same size and shape by the piston. The half-shafts (4, 5) comprise pistons (14, 15) which may run in inlet chambers (10, 11) and narrowings (12, 13) or holes, openings, leaks or the like through which the inlet gas passes to reach the respective explosion chambers through heads (8, 9). The cylinder (2) is provided with exhausts (21) at its median part. The above described engine (1) is connected with at least a connecting rod (16) and is able to do two active bursts during a turn of 360° of the connecting rod.
摘要:
With reference to FIG. 2, the invention relates to an opposed stepped piston two-stroke engine comprising at least a first and a second cylinder, wherein the air piston is a stepped piston providing a first air transfer piston that expands and compresses a first air transfer volume to deliver air from the first air transfer volume to an air transfer system, and the exhaust piston is a stepped piston providing a second air transfer piston that expands and compresses a second air transfer volume to deliver air from the second air transfer volume to the air transfer system, each of the first and second air transfer volumes having an air inlet for receiving air; and wherein the air transfer system provides fluid connection between the respective first air transfer volume of each cylinder and the air port of another respective cylinder, via respective first air transfer conduits, and fluid connection between the respective second air transfer volume of each cylinder and the air port of the other respective cylinder, via respective second air transfer conduits, wherein the drive system is configured, for each cylinder, to have a predetermined phase angle such that one of the exhaust piston and air piston is driven before the other piston, causing delivery of air from its respective air transfer volume to the air transfer system before delivery of air occurs from the other of the air transfer volumes.
摘要:
An engine capable of use with multiple different types of fuels including gasoline, alcohol based fuels, and heavy fuels such as diesel, JP5, JP8, Jet A, and kerosene based fuels. The engine (10) includes a main cylinder (25) having a compression chamber (26) at one end and a piston (31) that is movable along the length of the cylinder (25) and which connects to a crankshaft (23) for the engine (10). A fuel delivery system (72) delivers a combustible mixture of fuel and air through a fuel delivery valve (73) into the combustion chamber (26) at a sonic velocity of flow such that the fuel is substantially atomized into the air of the combustible mixture delivered to the combustion chamber (26). The combustible mixture is ignited by an igniter (160) within the combustion chamber (26) to urge the piston (31) along the cylinder for driving the crankshaft (23) of the engine (10).
摘要:
When considering the main types of commercial engines available on the market, whether two-stroke, four-stroke or rotary-type, it is found that, and this is commonplace, said engines are highly polluting. The main reason for this lies in the difficulty to manufacture worn gas filters which would not induce restriction. However, that difficulty can be overcome by producing an engine which is itself capable of sustaining a high rate of restriction. The technical solutions disclosed by the invention present several embodiments enabling the engine to tolerate a higher level of restriction and consequently a more dense filtering. These various technical embodiments provide for a novel path for fresh gases through the engine. The invention provides a solution, which is not primarily concerned with fresh gas supply but rather with waste gas absorption, followed by their subsequent evacuation constituting the first stroke of said engine. Indeed, the waste gases are evacuated outwards by two successive steps: the gases are evacuated outwards by pumping, and said discharge generates, in turn, a vacuum which sucks in the burnt fresh gases which in turn finally suck in the fresh gases. Said techniques have the further advantage of producing two stroke engines powered with gas only, and consequently cleaner and more efficient.
摘要:
An internal combustion engine has first and second cylinders (12, 14), the first cylinder (12) having a larger swept volume than the second cylinder (14) and the second cylinder being formed in the crown of the first cylinder. First and second pistons (16, 18) are reciprocable respectively in the first and second cylinders (12, 14), the second piston (18) being formed as a protrusion on the crown of the first piston (16). A combustion chamber (20) is formed in the second piston (18) with an air port (44) opening into the first cylinder (12) and a second port (40) opening into the second cylinder (14). A first inlet is provided (25) for supplying air or the like into the first cylinder (12) during an induction stroke of the first piston (16) together with a fuel inlet (36) for supplying fuel to said second cylinder (14). A passage extends between the first and second cylinder to enable transfer of air from said first cylinder (12) to said second cylinder (14) other than through said combustion chamber (20) over a preselected angle of movement of the pistons relative to the cylinders for assisting movement of gases from said second cylinder (14) into said combustion chamber (20). Additional control means for controlling the movement of air is also provided.