| 摘要 |
The invention pertains to a four-stroke combustion engine, comprising at least one cylinder (10); a piston (12) arranged in each cylinder (10); at least one inlet valve (18) arranged in each cylinder (10), which inlet valve (18) is connected with an inlet system (20); at least one first camshaft (22) which controls each inlet valve (18); - at least one exhaust valve (24) arranged in each cylinder (10), which exhaust valve (24) is connected with an exhaust system (26); at least one second camshaft (28) which controls each exhaust valve (24); and a crankshaft (16) which controls each camshaft (22, 28). At least one phase-shifting device (34) is arranged between the crankshaft (16) and the at least one second camshaft (28), to phase-shift the at least one second camshaft (28) in relation to the crankshaft (16) to a state, where the at least one exhaust valve (24) is controlled in such a way, that it is opened during the expansion stroke of the engine and closed during the exhaust stroke of the engine, to achieve engine braking through compression in the cylinders (10) during the exhaust stroke. The invention also pertains to a vehicle (1 ) comprising such a combustion engine (2) and a method to control a combustion engine (2). |
