The invention relates to a disc spreader comprising a frame consisting of a base frame (11) and an auxiliary frame (21), wherein a container (61) is secured to the base frame (11) and a spreader disc (22) is secured under the container (61) on the auxiliary frame (21), wherein, according to the invention, a dosing unit (12), preferably having a cellular wheel sluice (18), is arranged on the base frame (11) under the container (61), said dosing unit having an outlet (14) at the bottom for a collection hopper (23), wherein the collection hopper (23) is secured to this outlet (14) of the dosing unit (12) and the auxiliary frame (21) is secured on the base frame (11) by means of a quick-closure (15, 25). In this way, it is possible to provide a distributer (32, 32a) which can be connected to the outlet (14) of the dosing unit (12) after removal of the auxiliary frame (21) and the collection hopper (23), such that the disc spreader can be converted into a seeder.

System and methods for an internal combustion engine are described. In one example, the internal combustion engine may be a boosted internal combustion engine that includes an igniter that is at least partially positioned in a cylinder of the internal combustion engine. The igniter includes an orifice that is configured to release exhaust from a pre-chamber of the igniter.

The present invention pertains to arrangements for a pre-chamber of a combustion engine as well as pre-chambers comprising such arrangements, in particular to condition or temper a gas flow within a gas-purged pre-chamber prior to entering a combustion area. Accordingly, an arrangement for a pre-chamber gas valve of a combustion engine is suggested, comprising a housing having an outer surface and comprising a channel, a first end of the channel being in fluid communication with the outer surface and a second end of the channel being connectable to a valve seat of the pre-chamber gas valve, and at least one protrusion extending from the outer surface of the housing. The first end of the channel is arranged upstream of the second end of the channel and downstream of at least one protrusion, wherein the arrangement is configured to absorb heat from a combustion portion of the combustion engine arranged downstream of the second end and to temper a gas upstream of the second end only using said heat, when the arrangement is in a mounted state.