Abstract: Method and arrangement for providing an energy converter that includes a combustion system (1) including at least one piston (2, 3), at least one combustion chamber (6, 7) having at least one inlet (11, 13) and at least one outlet (10, 12) with inlet and outlet valves (14, 15, 16, 17). At least one controllable inlet valve and at least one outlet valve is also provided. A fuel supply is provided (18, 19) for supplying fuel and a medium containing oxygen is provided for induction into the combustion chamber (6, 7). An electric machine (9) is arranged to interact directly or indirectly with the piston (2, 3) in an electromagnetic manner such that it produces electrical energy from the piston movements, as well as uses electrical energy to affect the piston movement. A control unit (30) controls the combustion system (1) and the electric machine (9). The energy converter is arranged to adapt its power output depending on the required load of the energy converter.

Abstract: The invention relates to a device and a method for reducing emissions in catalytic converter exhaust systems for a vehicle provided with a combustion engine. The invention comprises a control unit adapted to control the air-fuel being fed to the engine so that a high concentration of hydrogen is generated in the exhaust gas during start-up of the engine. Furthermore, secondary air is supplied downstream of the engine during cold starting thereof for foaming a gas mixture with the exhaust gas. This gas mixture is oxidized, so that heat energy generated by means of this oxidation is supplied to the catalyst, thereby providing a reduction of the light-off time of the catalyst.

Abstract: An assembly, a method and a motor vehicle for cleaning ambient air in the vicinity of an internal combustion engine (102) having combustion air inlet means (103) and energy emitting means (104)are disclosed. The assembly (101) further includes adsorbent means (105) for adsorbing at least one pollutant when in a first mode of operation and for desorbing the pollutant when in a second mode of operation. The adsorbent means have an inlet (106) for polluted ambient air (107, 107′) and an outlet (108) for cleaned ambient air (109, 109′). Furthermore, the assembly (101) includes a pollutant conduit (110) through which the desorbed pollutant is transferred from the adsorbent means (105) to the combustion air inlet means (103) when in the second mode of operation, and the adsorbent means (105) are arranged for being brought into the second mode of operation by means of energy supplied from the energy emitting means (104).