Abstract: An internal combustion engine has a secondary air pump and a method for operating an internal combustion engine with a secondary air pump. The internal combustion engine is equipped with a secondary air pump, with an exhaust gas line and with a secondary air line. In this context, a connection between the discharge side of the secondary air pump and the exhaust gas line with the secondary air line is established. Moreover, the vacuum side of a brake booster is fluidically connected to the secondary air pump.

Abstract: A valve block for at least two valves fixable in a housing having an electric cabling to electrical terminals for the valves and a pneumatic circuit to pneumatic terminals for the valves. The block has an electrical plug connected to the electrical cabling, which extends to the electrical terminals and has a pneumatic plug connected to the pneumatic circuit, which extends to the pneumatic terminals, and the pneumatic circuit proceeds at least partly in a replaceable insert of the housing that can be selected dependent on the valves and/or their function. The pneumatic plug has at least one pneumatic plug connector selectable dependent on the valves and/or their function.

Abstract: The invention relates to a valve block for at least two valves, which can be fixed inside a housing (2), comprising: an electric cabling to electric connections for the valves (20a, 20b); a pneumatic cabling to pneumatic connections for the valves; an electric plug (4), out of which the electric cabling to the electric connections extends, and; a pneumatic plug (6a, 6b), out of which the pneumatic cabling to the pneumatic connections extends. The pneumatic cabling runs at least partially inside an interchangeable insert of the housing that can be selected according to the valves and/or their function and/or the pneumatic plug comprises at least one pneumatic plug connection that can be selected according to the valves and/or their function.