COMBUSTION ACCELERATING DEVICE OF ENGINE

PURPOSE:To increase the power of an engine without a supercharger or so by supplying the engine with air containing rich oxygen by means of an oxygen concentration increasing device and enriching the air fuel ratio at a high load of the engine. CONSTITUTION:A suction pipe 11 has branch pipes 12a and 12b which supply air containing rich oxygen via a pump P1, an oxygen concentration increasing device 13 which encloses an oxygen permeable film 14 made of silicon rubber and a pump P2. A supply ratio of normal air to air containing rich oxygen is regulated by valves 20 and 21 directly connected to a motor which is driven under control of a controller 23, on account of which at least with a high load of the engine, air containing rich oxygen is supplied therefor on the basis of detected value of a load sensor 25. The controller 23, furthermore, controls a control rack 7 of a fuel injection pump 4 via a solenoid 9 and a stopper 8 at a high load so as to increase the quantity of fuel to be supplied.