Internal combustion engine with cylinder deactivation and method for reducing the charge cycle losses during cylinder deactivation

摘要

Internal combustion engine having at least two cylinders (1, 2, 3, 4), in which each cylinder (1, 2, 3, 4) has at least one inlet opening to which an intake pipe (5a, 5b) adjoins, - each cylinder (1) 1, 2, 3, 4) has at least one outlet opening, to which an exhaust pipe (7a, 7b) adjoins, - at least two cylinders (1, 2, 3, 4) are configured in such a way that these at least two groups with in each case at least one cylinder (1, 2, 3, 4), wherein the at least one cylinder (1, 4) of a first group is a cylinder (1, 4) which is also in operation when the internal combustion engine is partially switched off, and the at least one cylinder (1) 2, 3) of a second group is designed as a switchable cylinder (2, 3), - the intake system (6B) of the second group is equipped with at least one shut-off element (10a) with which the supply of fresh air can be prevented, and the exhaust-gas removal system (8B) of the second group with at least one shut-off element (10b) equipped with which the discharge of exhaust gas can be suppressed, which is characterized in that between the at least one shut-off element (10a) of the intake system (6B) of the second group and the at least one shut-off element (10b) of the exhaust discharge system (8B) of the second group at least one vacuum line (11a, 11b) branches off, which is at least connectable to a vacuum source and in which a shut-off element (11a ', 11b') is arranged.