Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.

Kazuro Hotta

Yuki Nakamura

Satoshi Yamada

Yuta Furukawa

Shintaro Shuto

Kazuo Ogura

Kenichi Iizuka

Tomohiro Noguchi

Go Tomatsu

Takahiro Yamashina

Hideaki Nagamochi

The purpose of the present invention is to provide a gas engine and a ship provided with the same, the gas engine making it is possible to ensure a distance that enables fuel and an oxidizing agent to mix, and to evenly mix the oxidizing agent and the fuel even if the flow rate of gas traveling towards intake pipes varies. A gas engine () comprises: an intake passage () through which a gas flows; a plurality of intake pipes (A,B) where the intake passage () branches apart at a branching section () that is downstream in the gas flow direction, the intake pipes opening to a cylinder () at the downstream end; and a fuel injection means () that injects fuel into the intake passage (). The fuel injection means () is provided upstream of the branching section () in the gas flow direction, and injects varying quantities of fuel into the plurality of intake pipes (A,B).

Gas engine and ship provided with same

An engine system control apparatus includes a parameter reception unit that receives parameters necessary for acquiring a pressure ratio of the low-pressure compressor and a pressure ratio of the high-pressure compressor, a pressure ratio acquisition unit that acquires the pressure ratio of the low-pressure compressor and the pressure ratio of the high-pressure compressor based on the parameters, an inter-compressor pressure ratio acquisition unit that acquires an inter-compressor pressure ratio obtainable by dividing the pressure ratio of the high-pressure compressor by the pressure ratio of the low-pressure compressor, and a control unit that controls the exhaust gas flowrate adjustment unit such that the inter-compressor pressure ratio becomes a predetermined pressure ratio for optimizing an operation efficiency of the engine system.

Engine system control apparatus and engine system

A engine system is provided with: a plurality of cylinder groups which burn a gas mixture and discharge an exhaust gas; a plurality of high-pressure stage superchargers each having high-pressure stage turbines driven by the exhaust gas from the corresponding cylinder group and high-pressure stage compressors rotated by driving of the high-pressure stage turbines and configured to compress a gas supplied to the corresponding cylinder group; and a plurality of low-pressure stage superchargers having a low-pressure stage turbine driven by an exhaust gas discharged from the high-pressure stage turbine of the high-pressure supercharger which is any one of the plurality of high-pressure stage superchargers, and a low-pressure stage compressor rotated by driving of the low-pressure stage turbine and configured to compress a gas supplied to the high-pressure stage compressor of the high-pressure stage supercharger other than the one high-pressure stage supercharger.

Engine system

It is intended to reduce generation of water mist in cooling of compressed air. A multi-stage supercharging system () includes a first supercharger () of a low-pressure side, an intercooler () that cools air discharged from the first supercharger (), a second supercharger () of a high-pressure side that compresses the discharged air after cooling, and a control device (). The control device () includes an information acquisition section that acquires, as input information, the ambient air temperature, the ambient air humidity, the ambient air pressure, and the discharge pressure of the first supercharger (), a water vapor partial pressure calculation section that calculates the water vapor partial pressure of the discharged air of the first supercharger () by using the ambient air temperature, the ambient air humidity, the ambient air pressure, and the discharge pressure of the first supercharger () as parameters, a target temperature setting section that sets, as a target temperature, a temperature at which the water vapor partial pressure calculated by the water vapor partial pressure calculation section reaches a saturated water vapor pressure, and a valve opening degree control section that controls the intercooler () such that the ambient air temperature of the second supercharger () reaches equal to or higher than the target temperature.

Multi-stage supercharging system and device and method for controlling the same

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Tokyo, Japan

Kazuro Hotta