CONTROL DEVICE AND CONTROL METHOD FOR GAS ENGINE AND GAS ENGINE EQUIPPED WITH CONTROL DEVICE

WIPO Patent Application WO/2015/107753

A1

The present invention suppresses a drop in the rotating speed of a gas engine due to a sudden load increase using a simple configuration. This control device (51) is equipped with: a required gas flow rate calculation unit (54) that calculates, from a deviation between an engine speed and a target engine speed, a required gas flow rate (Qg_d) for keeping the engine speed constant; a throttle valve opening calculation unit (55) that calculates a throttle opening in accordance with the required gas flow rate (Qg_d); a mixture gas flow rate calculation unit (56) that calculates a mixture gas flow rate (Qm) from the engine speed, an intake air pressure, an intake air temperature, the displacement of the engine, and so forth; a gas flow rate command value calculation unit (57) that calculates, from the mixture gas flow rate (Qm) and a target excess air ratio (λ) during a steady-state operation, a required gas flow rate command value (Qg_t) for matching with the target excess air ratio (λ); and a corrective calculation unit (58) that, when the required gas flow rate (Qg_d) is greater than the gas flow rate command value (Qg_t), downwardly adjusts the target excess air ratio (λ) such that the required gas flow rate (Qg_d) matches the gas flow rate command value (Qg_t).

SASE RYO (JP)
TAKAYANAGI KO (JP)

PCT/JP2014/079160

July 23, 2015

November 04, 2014

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MITSUBISHI HEAVY IND LTD (JP)

F02D41/14; F02D19/02; F02D43/00

JP2010539383A	2010-12-16
JP2009057873A	2009-03-19
JP2001003814A	2001-01-09
JP2003097314A	2003-04-03
JP2005180399A	2005-07-07
JPH0533727A	1993-02-09

FUJITA, Takaharu et al. (JP)
Takaharu Fujita (JP)

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