Toyota Jidosha Kabushiki Kaisha

Takashi Hashima

Tatsuo Kobayashi

Toyokazu Baika

Toshimi Kashiwagura

Shizuo Abe

Nobuyuki Muramatsu

Mutsumi Kanda

Hiroyuki Hokuto

Fumiaki Hattori

Hiroya Tanaka

Souichi Matusita

Masaharu Ichise

Souichi Matsushita

Terutoshi Tomoda

Hiroshi Nomura

Shinichiro Nogawa

Kichiro Kato

Yasuhito Tsutsumi

Koukichi Fujimori

Matsumi Kanda

Toshimi Kawashiwagura

An exhaust device of an internal combustion engine includes a burner device () including a fuel addition device () for adding fuel to an exhaust passage () of the internal combustion engine (), and igniting the added fuel, and a controller () which detects an abnormal condition of the burner device () on the basis of a temperature change at a temperature detection point in the exhaust passage () downstream of the fuel addition device () after changing the amount of addition of the fuel.

Exhaust device of internal combustion engine

In an internal combustion engine, it is first determined whether a load factor of the internal combustion engine is a specified value or more and the engine speed of the internal combustion engine is a specified speed or less. If these conditions are satisfied, fuel is injected from both of a port injection valve and a direct injection valve, and a fuel injection timing of the direct injection valve is decided so as to inject fuel from the direct injection valve during the compression stroke of the internal combustion engine.

Method and apparatus for controlling operation of internal combustion engine, and the internal combustion engine

An internal combustion engine () is provided with a port injector () and an in-cylinder injector (). Before a port injection is started, the total amount of fuel to be injected is calculated (at an injection amount calculation timing). The port injection fuel amount and the in-cylinder injection fuel amount are calculated by appropriately dividing the total amount between them. If a change of the operating load on the internal combustion engine () is detected after the injection amount calculation timing, the load change is reflected in the amount of fuel to be injected in the current engine cycle by increasing or decreasing the in-cylinder injection fuel amount.

Fuel injection control device for internal combustion engine

An in-cylinder injection type internal combustion engine is provided, which first fires a first spark plug and thereafter fires a second spark plug when a required load is low and which first fires the second spark plug and thereafter fires the first spark plug when the required load is high.

In-cylinder injection type internal combustion engine

A direct cylinder injection-type spark ignition internal combustion engine is disclosed. The engine comprises a spark plug, a cavity formed in the top surface of a piston, and a fuel injection valve for injecting fuel into the cavity in nearly the shape of a fan having a relatively small thickness. When the fuel injected in nearly the shape of a fan from the fuel injection valve is considered by being divided into a plurality of fuel segments in a radial direction, a side wall of the cavity has a first fuel deflection passageand a second fuel deflection passagefor so deflecting at least two of the plurality of fuel segments as to pass near the spark plug. The side wall of the cavity is at least partly provided with a return portionthat protrudes toward the inside of the cavity. The first fuel deflection passage is not provided with the return portionor is provided with the return portion having a short protrusion, and the second fuel deflection passage is provided with the return portionhaving a long protrusion.

Direct cylinder injection-type spark ignition internal combustion engine

A direct cylinder injection-type spark ignition internal combustion engine is disclosed. The engine comprises a spark plug, a cavity formed in the top surface of a piston, and a fuel injection valve for injecting fuel into the cavity in nearly the shape of a fan having a relatively small thickness. When the fuel injected in nearly the shape of a fan from the fuel injection valve is considered by being divided into a plurality of fuel segments in a radial direction, a side wall of the cavity has a first fuel deflection passage and a second fuel deflection passage for so deflecting at least two of the plurality of fuel segments as to pass near the spark plug. The side wall of the cavity is at least partly provided with a return portion that protrudes toward the inside of the cavity. The first fuel deflection passage is not provided with the return portion or is provided with the return portion having a short protrusion, and the second fuel deflection passage is provided with the return portion having a long protrusion.

A direct-fuel-injection-type spark-ignition internal combustion engine is disclosed. The engine comprises a spark plug, a cavity formed on the top surface of the piston, and a fuel injection valve for injecting fuel into the cavity in nearly the shape of a fan having a relative small thickness. In the engine, the side wall of the cavity facing the fuel injection valve, for leading the fuel to the vicinity of the spark plug, has a horizontal sectional shape consisting of a part of an ellipse shape of which two foci are at a position of the injection hole of the fuel injection valve and a position near to the spark plug in plan view, and the side wall has a deflecting portion to deflect the fuel toward the inside of the cavity.

Direct-fuel-injection-type spark-ignition internal combustion engine

Growing community of inventors

Gotenba, Japan

Takashi Hashima