Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.

Yusuke Imamori

Sota Watanabe

Taro Tamura

Satoshi Yamada

Kengo Tanaka

Kazutoshi Nomura

Shintaro Shuto

Satoru Murata

Yoshitaka Tsubaki

An internal combustion engine includes: a combustion chamber to which a gas fuel containing hydrogen is supplied; an ignition device configured to ignite the gas fuel within the combustion chamber; and a control device for controlling execution of an ignition operation of the ignition device at a predetermined ignition timing. The predetermined ignition timing includes a first-time ignition timing of one combustion cycle, at which the ignition operation is executed for a first time, and a subsequent ignition timing of the one combustion cycle, at which the ignition operation is executed subsequent to the first-time ignition timing.

Internal combustion engine

In this engine control device for controlling an engine with a turbocharger, a rotation speed increase mode includes at least one stage of fuel injection in one combustion cycle of the engine, a high-idle mode includes at least two stages of fuel injection in one combustion cycle of the engine, and a high-idle mode execution unit is configured to retard the timing of the second stage fuel injection in one combustion cycle of the engine in the high-idle mode, relative to the timing of the first stage fuel injection in one combustion cycle of the engine in the rotation speed increase mode.

Engine control device and engine control method

A piston of an internal combustion engine configured to be reciprocable along an axial direction in a cylinder includes a cavity formed to be recessed in a center of a piston top surface, and an outer circumferential edge portion located on a radially outer side of the cavity in the piston top surface. The cavity includes a lip portion, a raised portion, and a curved portion. The curved portion includes an outer circumference-side curved surface which includes a curved surface connected to the lip portion, an inner circumference-side concave surface which is located on a radially inner side of an outer circumference-side curved surface and includes a surface connected to a raised portion, the inner circumference-side concave surface including a deepest portion of the cavity, and a convex surface formed between the outer circumference-side curved surface and the inner circumference-side concave surface, as well as protruding upward.

Piston of internal combustion engine and internal combustion engine

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Tokyo, Japan

Yusuke Imamori