Fuel injection valve, internal combustion engine and fuel injection method

Abstract

It is an object of the present invention to reduce the penetration of a fuel spray directed toward a certain area in a cylinder, thereby reducing oil dilution that increases sliding resistance in the engine, reducing fuel adhesion or the like onto the cylinder liner, and also reducing the adverse effect of a fuel spray having an increased penetration. A fuel injection valve that has a plurality of injection holes and injects fuel into a cylinderof an internal combustion engine includes: injection holes aand ahaving a larger diameter for injecting fuel toward a ring-shaped space Tincluding areas Aand Aof strong tumble flow T formed in the cylinder; and injection holes a, a, aand ahaving a smaller diameter for injecting fuel toward a space including areas A, A, Aand Aof weak tumble flow formed in the cylinder. A fuel spray from an injection hole having the larger diameter has a penetration force to the tumble flow larger than the penetration force of a fuel spray from an injection hole having the smaller diameter.