Bosch Corporation

Toyota Jidosha Kabushiki Kaisha

Kaoru Maeda

Hiroshi Nomura

Takeshi Ashizawa

Osamu Tomino

Yuichiro Goto

Wolfram Wiese

Keisuke Matsumoto

Daniel Scherrer

Takeo Kushida

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.

Fuel injection valve, internal combustion engine and fuel injection method

An engine provided with a fuel injector for directly injecting fuel into a cylinder, a spark plug positioning a spark gap in a flight path of fuel injected from the fuel injector, and a cavity formed in a piston top face, wherein at the time of stratified combustion, the fuel injector injects substantially all of the fuel in a direction merging with a tumble flow, swirling in a longitudinal direction along the cavity at the compression stroke, along the swirl direction of the tumble flow and uses the spark plug to ignite the fuel while the fuel at the end period of injection is passing through the spark gap.

Cylinder injection type spark ignition internal combustion engine

Growing community of inventors

Yokohama, Japan

Kaoru Maeda