Fuel supply system for engine

Abstract

When a flywheel rotates and a first magnet comes close to and opposes a fuel pump, a plunger is moved toward a partition wall of a pump chamber against an urging force of a spring by a magnetic repulsive force generated between the first magnet and a second magnet in the fuel pump. When the first magnet separates from the fuel pump, the plunger is moved and returned toward a protective cover by the urging force of the spring. As a result, the plunger in the fuel pump reciprocates with rotation of the flywheel, and the capacity of the pump chamber increases and decreases, so that fuel is sucked and discharged.

1 . An engine fuel supply system that pressurizes fuel from a fuel tank and supplies the pressurized fuel to a fuel injection valve, the engine fuel supply system comprising:
 a first magnetic member fixed to an outer peripheral portion of a rotor connected to a rotation shaft of an engine; and   a fuel pump opposing the outer peripheral portion of the rotor and including a second magnetic member that magnetically acts on the first magnetic member,   wherein at least one of the first magnetic member and the second magnetic member is formed by a permanent magnet, and   wherein the fuel pump reciprocates the second magnetic member by a magnetic force between the first magnetic member and the second magnetic member, the magnetic force changing with rotation of the rotor, and sucks the fuel from the fuel tank and discharges the fuel with a predetermined pressure by the reciprocation.   
     
     
         2 . The engine fuel supply system according to  claim 1 , wherein the first magnetic member is a permanent magnet for generating ignition power. 
     
     
         3 . The engine fuel supply system according to  claim 1 , wherein the fuel pump is a plunger-type pump that sucks and discharges the fuel by reciprocating a plunger including the second magnetic member.