Patent ID: 7845317

Claim:
An energy converter, comprising: a free piston engine having a piston unit that comprises a) a piston or b) pistons that are connected together so as to reciprocate with each other; at least one combustion chamber provided with at least one inlet and at least one outlet and inlet and outlet valves, of which inlet and outlet valves at least one is controllable; and means for supplying fuel and a medium containing oxygen into the combustion chamber or chambers; an electric motor/generator arranged to interact with the piston unit through electromagnetic coupling between the motor/generator and the piston unit so as to produce electrical energy from movements of the piston unit and to use electrical energy to affect the movements of the piston unit; and a control unit that controls the free piston engine and the electric motor/generator; wherein the energy converter is arranged to supply the control unit with information regarding required load, said energy converter also being arranged to adapt power output from said electric motor/generator depending on the required load of the energy converter.