INTERNAL COMBUSTION ENGINE WITH IN-CYCLE HEAT RECOVERY (EMBODIMENTS) Russian patent published in 2024 - IPC F02B33/22 F02G5/02 

FIELD: internal combustion engines.

SUBSTANCE: internal combustion engine contains at least one compressor cylinder (1) and one working cylinder (3) of the same diameters. The engine has pistons (2) and (4), a crankshaft, an injection system, intake and exhaust valves, an ignition system, an engine starting system, a cooling and lubrication system and recuperative heat exchanger (9) with a combustion gas circuit and an air circuit. The combustion products circuit of heat exchanger (9) is connected to exhaust valve (8) of working cylinder (3). The air circuit inlet is connected to exhaust valve (6) of compressor cylinder (1). The outlet of the heat exchanger air circuit is connected to inlet valve (7) of working cylinder (3). The work cycle is carried out in two cylinders (1) and (3). The engine is equipped with a booster compressor, which is occasionally connected to the engine shaft. The air receiver is connected by a pipeline to the compressor and the air circuit of the heat exchanger through a controlled inlet valve. The controlled drain valve is connected to the air circuit of recuperative heat exchanger (9) and communicates with the atmosphere. The diameters of working and compressor cylinders (3) and (1) are equal to each other. The crank of the crank mechanism of working cylinder (3) is located on the same crankshaft with the crank of compressor cylinder mechanism (1). The radius of the crank of the crank mechanism of working cylinder (3) is greater than the radius of the crank of the mechanism of compressor cylinder (1) by a number of times equal to or close to the ratio of the temperature of the air entering the working cylinder from the heat exchanger to the air temperature at the end of the compression process in the compressor cylinder. An embodiment of an internal combustion engine is disclosed.

EFFECT: equality of the mass of air leaving the compressor cylinder and the mass of air entering the working cylinder.

2 cl, 3 dwg