INTERNAL COMBUSTION ENGINE AND METHOD OF ITS OPERATION Russian patent published in 2017 - IPC F01N13/10 F02F1/42 F02B75/20 

FIELD: engines and pumps.

SUBSTANCE: invention relates to in-line four-cylinder internal combustion engines. Summary: engine comprises at least one cylinders head, four cylinders (1, 2, 3, 4) with linear arrangement along longitudinal axis of said at least one cylinders head and crankshaft (15), which belongs to crank drive and which comprises crank (11, 12, 13, 14) for each cylinder (1, 2, 3, 4), installed in accordance with specified cylinder (1, 2, 3, 4). Crankshaft cranks (11, 12, 13, 14) are equally spaced relative to each other along crankshaft (15) longitudinal axis (15a). Each cylinder (1, 2, 3, 4) contains at least one outlet (5) to discharge exhaust gases from cylinder (1, 2, 3, 4) through exhaust system (6), for this purpose discharge line (8) adjoins each outlet hole (5). Cylinders (1, 2, 3, 4) are arranged in two groups, wherein in each case one outer cylinder (1, 4) and adjoining to it inner cylinder (2, 3) form group, and discharge lines (8) of cylinders (1, 2, 3, 4) are merged together, to produce common discharge line (10), so that exhaust manifold (7) is formed in stages. At that, in each case outlet lines (8) of each group of cylinders are merged together to make partial discharge line (9), and then occurs merging of two partial discharge lines (9) of two groups of cylinders, and common discharge line (10) is produced. According to invention, two cylinders (1, 2, 3, 4) crankshaft two cranks (11, 12, 13, 14) of each set of cylinders are not shifted relative to each other in circular direction around crankshaft (15) longitudinal axis (15a), so that cylinders (1, 2, 3, 4) of said group of cylinders are mechanically synchronized to each other. At that, one group of cylinders crankshaft cranks (11, 12, 13, 14) are arranged so, that are displaced by 180° in circular direction of crankshaft (15) relative to cranks (11, 12, 13, 14) of another group of cylinders.

EFFECT: technical result is exclusion of pressure waves mutual influence or fluctuations in exhaust system in case of charge in cylinders change.

17 cl, 3 dwg