Hitachi, Ltd.

Hitachi Automotive Engineering Co., Ltd.

Jun'ichi Yamaguchi

Minoru Ohsuga

Ryoichi Komuro

Toshiharu Nogi

Hiroyuki Yamada

Yasushi Sasaki

Nobuo Kurihara

Mamoru Fujieda

Yoshishige Ohyama

Teruhiko Minegishi

Masakichi Momono

Hiroshi Fujii

Takuya Shiraishi

Kazuo Tahara

Yoshiyuki Tanabe

Keigo Naoi

Masayuki Shizuka

Ryoichi Komro

Shigeyuki Kemma

An injector having three concentrated fuel spray bands is used, one of the fuel spray bands is directed to an spark plug, and the others are directed to curved grooves on a piston. The sprays that enter each groove advance along each groove, mutually collide substantially under the spark plug, and are ascended. Further, these spray bands are carried to the vicinity of the spark plug by a tumble flow and stable stratified air-fuel mixture is formed. As described above, stable and satisfactory stratified combustion can be made.

Direct-injection engine, method of controlling the same, piston used in the same and fuel injection valve used in the same

An air intake arrangement for an internal combustion engine comprising: a main air intake conduit leading to a gas intake valve ( ) for respective engine cylinders ( ) and including a main air intake passage ( ), a main collector chamber ( ) and independent branching air intake passages ( ) for the respective engine cylinders ( ) connected in series; a throttle valve ( ) disposed in the main intake air passage ( ) for controlling the flow rate of air passing therethrough; an auxiliary air intake passage ( [object Object]

Air intake arrangement for internal combustion engine

An improved intake equipment, in which the formation of a liquid fuel film due to deflection of the fuel can be avoided, has a plurality of independent air intake pipes connected to a combustion chamber, for introducing air thereto, collectors connected to the independent air intake pipes, for distributing the introduced air into them, and a throttle valve connected to the collectors, for controlling the amount of air flow. A fuel supplying mechanism is provided on a wall of the independent intake pipes, for supplying fuel to the air and mixing the air and fuel, and a deflection mechanism is provided for deflecting the air flow of the independent intake pipes so as to avoid undersirable deflective of the fuel.

Air intake equipment for internal combustion engine

An air-fuel mixture supply apparatus includes an intake passage opening to a combustion chamber in a cylinder, an intake valve provided between the intake passage and the combustion chamber, a fuel injection valve for injecting at least one of branched spray flows directing to the intake valve, a swirl generator generates vortex flow in the mixture in the combustion chamber by controlling to choke the intake passage. The swirl generator comprises a main passage forming the intake passage, at least one of sub-intake passages which is provided to form a by-pass passage of the main passage and formed such that the total sum of the cross-sectional areas is smaller than the cross-sectional area of the main passage, an intake control valve for controlling the choke of the main passage, a valve for controlling the choke at least one of the sub-intake passages, a controller for varying the number of the sub-intake passages to be used and the cross-sectional area of each of the sub-intake passages corresponding to the operating state of the internal combustion engine, and another controller for varying the direction of fuel injection and the number of fuel injections corresponding to the operating state of the internal combustion engine.

Internal combustion engine and air-fuel mixture supply apparatus therefor

An intake pipe for an internal combustion engine has an intake assembly to which the air supplied from an air cleaner flows in accordance with the opening of a throttle valve, and independent intake pipes receive the air in the intake assembly and distribute the air into each cylinder of the internal combustion engine. The intake passage between the air cleaner and the throttle valve assembly is arranged next to and separated by a partition wall from at least one of a negative pressure part of the intake passage downstream of the throttle vale, the intake assembly provided in the negative pressure part and the independent intake pipes, whereby two independent intake spaces are formed on either side of the partition wall.

Intake pipe for internal combustion engine

An improved intake equipment, in which the formation of a liquid fuel film due to deflection of the fuel can be avoided, has a plurality of independent air intake pipes connected to a combustion chamber, for introducing air thereto, collectors connected to the independent air intake pipes, for distributing the introduced air into them, and a throttle valve connected to the collectors, for controlling the amount of air flow. A fuel supplying mechanism is provided on a wall of the independent intake pipes, for supplying fuel to the air and mixing the air and fuel, and a deflection mechanism is provided for deflecting the air flow of the independent intake pipes so as to avoid undesirable deflection of the fuel.

The present invention relates to a control circuit for use in an internal combustion engine having a cranking device and an air pump driven by a starter motor. The control circuit comprises a first circuit for supplying a power to the starter motor and the cranking device, a second circuit for terminating power supply for the cranking device with maintaining power supply for the starter motor, and a control unit for selectively switching between the first and second circuits.

Method and system for controlling internal combustion engine with air

An air intake arrangement for an internal combustion engine comprising: a main air intake conduit leading to a gas intake valve (241 ) for respective engine cylinders (206 ) and including a main air intake passage (202 ), a main collector chamber (204 ) and independent branching air intake passages (205) for the respective engine cylinders (206) connected in series; a throttle valve (203 ) disposed in the main intake air passage (202 ) for controlling the flow rate of air passing therethrough; an auxiliary air intake passage (210 ) bypassing the main air intake conduit, an inlet port of the auxiliary air intake passage (210 ) opens into the main air intake passage (202) at the upstream of the throttle valve (203 ), an outlet port (213 ) of the auxiliary air intake passage (210 ) opens into the respective independent branching air intake passages (205) near the gas intake valve (241) for the respective engine cylinders (206 ) in such a manner that gas blown-out from the auxiliary air intake passage (210 ) induces a gas swirl in the respective engine cylinders (206); an intake air control valve (211) disposed in the auxiliary air intake passage (210 ) for controlling the flow rate of air passing therethrough; and a control unit (222) which determined an operating condition of the internal combustion engine and controls an opening degree of the intake air control valve (211) based on the determined engine operating condition.

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Hitachinaka, Japan

Jun'ichi Yamaguchi