Valve arrangement

A valve arrangement for supplying air to a combustion chamber of an internal combustion engine, the valve arrangement comprising:

• a first valve, the first valve comprising a first valve head, a first valve stem assembly and an internal cavity, which is at least partly located in the first valve stem assembly, the first valve being movable between an upper, closed position of the valve, and a lower, open position, in which open position air provided via an air intake is supplied to the combustion chamber past the first valve head;
• a second valve partly arranged within the internal cavity of the first valve, the second valve comprising a second valve head and a second valve stem assembly, and being movable within the internal cavity between an upper, closed position, in which closed position the second valve head is in contact with an inner surface of the first valve head, and a lower, open position in which open position additional air may be supplied to the combustion chamber via the internal cavity past the second valve head, wherein at least one air inlet for supplying the additional air to the internal cavity is arranged along a circumference of the first valve stem assembly, at least one of the at least one air inlets being separately arranged from the air intake;
• a stem joining device extending between the first valve stem assembly and the second valve stem assembly and allowing relative movement between the first valve stem assembly and the second valve stem assembly between the closed position and the open position of the second valve, the stem joining device extending over a junction between the first valve stem assembly and the second valve stem assembly so as to form a junction seal;
• and
• a junction leakage preventing means being arranged to hinder leakage of liquid from the outside of the junction seal from reaching in between the first valve stem assembly and the second valve stem assembly.