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Patent Searching and Data


Title:
ENGINE OPERATION METHOD AND ENGINE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/049362
Kind Code:
A1
Abstract:
A four-stroke dual-fuel engine (1) that is for propelling a ship and that operates by switching between a gas mode, in which a gas fuel speed-regulating control is carried out using a gas fuel as a primary heat source, an assist mode, in which a liquid fuel speed-regulating control is carried out using both the gas fuel and a liquid fuel as the fuel, and a diesel mode, in which a speed-regulating control is carried out using only the liquid fuel as the fuel. A control unit (22) of the engine (1) has an operation control unit (49) for carrying out operational control of the engine, a gas governor (44) for carrying out a speed-regulating control related to the amount of gas fuel supplied, and a diesel governor (48) for carrying out a speed-regulating control related to the amount of liquid fuel supplied. During operation in the assist mode, when the output of the engine 1 enters an assist-off region, which is a region on either side of and including a cube root characteristic line for the ship, the engine operation moves to the gas mode. During operation in the gas mode, when the output of the engine (1) enters an assist-on region in which the output is higher than in the assist-off region the engine operation moves to the assist mode.

Inventors:
KUROIWA TAKANORI (JP)
HASHIMOTO TORU (JP)
Application Number:
JP2017/032662
Publication Date:
March 14, 2019
Filing Date:
September 11, 2017
Export Citation:
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Assignee:
NIIGATA POWER SYSTEMS CO LTD (〒1010021, JP)
International Classes:
F02D19/06; F02D45/00
Foreign References:
JP2017057774A2017-03-23
JPS59157259A1984-09-06
Attorney, Agent or Firm:
TERAMOTO Mitsuo et al. (〒1006620, JP)
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