Kawasaki Jukogyo Kabushiki Kaisha

Yoshinobu Mori

Takashi Abe

Takuya Sakamoto

Daisuke Yanase

Shinichi Kuratani

Hirohide Matsushima

Seiji Yamashita

Kozo Suzuki

Daisuke Kariya

Hidetsugu Ishimaru

Takeshi Ikeda

Ryo Suzuki

Kenji Takenaka

Junji Tamura

Toshihiro Komiya

Tsuyoshi Takeuchi

Sou Kurosaka

Kouzou Suzuki

A liquefier system includes: a feed line configured to feed a raw material gas from a raw material supply source such that a pressure of the raw material gas in a predetermined portion of the feed line is kept higher than or equal to a predetermined pressure; a cooling medium circulation line configured to cause a cooling medium to circulate; a static pressure gas bearing configured to be supplied with the gas that has a pressure higher than or equal to the predetermined pressure and to rotatably support a rotating shaft of an expansion turbine; and a bearing supply line configured to connect the predetermined portion of the feed line and a gas inlet of the static pressure gas bearing, such that the gas is supplied to the static pressure gas bearing.

Liquefier system

A method of estimating an ideal air-fuel ratio in an internal combustion engine, comprises receiving an output of an upstream air-fuel ratio sensor and an output of a downstream air-fuel ratio sensor, the upstream air-fuel ratio sensor being attached to an exhaust gas passage such that it is positioned upstream of a catalyst provided in the exhaust gas passage to purify an exhaust gas, the downstream air-fuel ratio sensor being attached to the exhaust gas passage such that it is positioned downstream of the catalyst; detecting a state in which the catalyst does not store or release oxygen based on the output of the downstream air-fuel ratio sensor; and deciding as an estimated ideal air-fuel ratio in the internal combustion engine an air-fuel ratio detected by the upstream air-fuel ratio sensor when the state in which the catalyst does not store or release oxygen is detected.

Device and method for estimating ideal air-fuel ratio in internal combustion engine, method of estimating oxygen storage capacity of catalyst, internal combustion engine device and motorcycle incorporating internal combustion engine device

An air-fuel ratio control system of an internal combustion engine comprises a fuel amount determiner for determining a fuel command value. The fuel amount determiner has a feedback control mode in which the fuel amount determiner determines a running state reference coefficient corresponding to a running state detected by a running state detector based on a first correspondence stored in the memory, determines a running state compensation coefficient corresponding to the running state detected by the running state detector based on a second correspondence stored in the memory, determines a feedback compensation coefficient used to cause an air-fuel ratio to reach a value closer to a theoretical air-fuel ratio based on an output of the air-fuel ratio sensor, and determines the fuel command value using a formula including the determined running state reference coefficient, the determined running state compensation coefficient, and the determined feedback compensation coefficient.

Air-fuel ratio control system and air-fuel ratio control method of internal combustion engine

An ECU is used in a motorcycle including an engine E, which combusts in a combustion chamber a blended fuel in which gasoline and ethanol are blended, and a fuel injection device for injecting a fuel with a predetermined fuel injection amount such that an air excess ratio in the combustion chamber is a first predetermined value when an ethanol concentration of the blended fuel is zero. The ECU executes Ofeedback control based on an Oconcentration derived from an output of an Osensor. Further, the ECU calculates an actual fuel compensation ratio by dividing a fuel injection amount after the Ofeedback control by a predetermined fuel injection amount, and estimates the concentration of the alternative fuel based on this actual fuel compensation ratio and a first predetermined value stored in the ECU.

Alternative fuel concentration estimating system, vehicle comprising alternative fuel concentration estimating system, and alternative fuel concentration estimating method

A method of estimating an air-intake amount of an internal combustion engine is provided. The method may comprise detecting a fluid energy amount in an interior of an air-intake passage at first and second points in time while an intake valve is closed from a compression stroke to an exhaust stroke, and calculating a predicted air-intake amount using the values of the fluid energy amounts at the first and second points with reference to an air-intake amount calculation map showing a correlation between the values of the fluid energy amounts at the first and second points and the predicted air-intake amount in the intake stroke, the air-intake amount calculation map being pre-created by finding the values of the fluid energy amounts in the air-intake passage at the first and second points and the air-intake amount, for plural running states of the internal combustion engine.

Method and system for estimating an air-intake amount of an internal combustion engine, and internal combustion engine

A method and apparatus, and vehicle on which the apparatus is mounted, for controlling combustion of a fuel-injection, internal-combustion engine with two or more cylinders are provided. The method includes determining a deceleration condition of a vehicle being driven by the engine, and thinning the fuel-injection of the engine when the deceleration condition is determined.

Method and device for controlling combustion of an internal-combustion engine, and vehicle

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Kobe, Japan

Yoshinobu Mori