Patent ID: 7703445

Claim:
A fuel supply system, comprising: a fuel reformer configured to produce a reformed gas-containing fuel by causing discharge in a liquid fuel; a fuel supply device configured to supply the reformed gas-containing fuel or a mixture of the reformed gas-containing fuel and the liquid fuel into a combustion chamber of an engine; and an electric discharge controller configured to control a discharge voltage of the fuel reformer in response to an output state of the engine, wherein the fuel reformer comprises: a reaction container filled with the liquid fuel; a first electrode which is electrically connected to the electric discharge controller, and is in the reaction container; a second electrode which is in the reaction container to be opposed to the first electrode, and is configured to generate plasma by an electric discharge with the first electrode in the liquid-fuel-filled reaction container; and an emission unit configured to emit reformed gas, wherein the reformed gas is produced by contact of the liquid fuel with the plasma, from the reaction container, wherein a surface of the first electrode, which is a surface located in an interior of the reaction container, includes a coated portion coated with an insulating material, and an exposed portion which is not coated with the insulating material.