Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.

Yusuke Yashiro

Yoshihiro Hayashi

Byeongil An

Masayuki Hashimoto

Yuuji Wakai

Yu Kobayashi

Yuki Yamada

Vissuta Jiwariyavej

A control parameter calculation device comprises an integration unit that calculates the target value of combined power obtained by summing a first power and a second power by smoothing the first power on the basis of the value of a predetermined control parameter and calculates charge/discharge power when charging and discharging are performed so as to achieve the target value; a smoothing performance calculation unit that calculates a smoothing performance evaluation index of the combined power on the basis of the charge/discharge power calculated over an evaluation period; a lifetime calculation unit that calculates a lifetime evaluation index of the battery during the evaluation period on the basis of the calculated charge/discharge power; and an evaluation unit that evaluates the value of a control parameter on basis of the smoothing performance evaluation index and the lifetime evaluation index which are calculated repeatedly while varying the value of the control parameter.

Control parameter calculation device, power supply system, control parameter calculation method, and program

Provided is a smoothing-target-value calculation device that is capable of calculating a smoothing target value with which it is possible to suppress battery degradation. The present invention provides a smoothing-target-value calculation device that calculates a smoothing target value, which is a target value for the sum of first power generated by a renewable-energy power generation system and second power charged into and discharged from a battery, the smoothing-target-value calculation device including: a predicted-value acquisition unit that acquires a predicted value for the first power; a predicted-value correction unit that corrects the predicted value; and a smoothing-target-value calculation unit that calculates a smoothing target value by smoothing the corrected predicted value.

Smoothing-target-value calculation device, power supply system, smoothing-target-value calculation method, and program

A centrifugal compressor according to an embodiment includes a compressor impeller, a compressor housing, a suction-surface-side member disposed on a suction surface side of the compressor impeller, and a piezoelectric vibrator disposed in at least one of the compressor housing or the suction-surface-side member. The compressor housing and the suction-surface-side member have wall surfaces defining a space surrounded by the compressor housing and the suction-surface-side member. The wall surface of the at least one of the compressor housing or the suction-surface-side member is at least partially vibratable by operation of the piezoelectric vibrator.

Centrifugal compressor and turbocharger

A multi-stage turbo supercharging system includes: a bypass passage which bypasses a turbocharger from among a plurality of turbochargers, in an intake passage or an exhaust passage of the engine; a bypass valve disposed in the bypass passage; an operation mode selection part; a bypass valve opening degree map selection part configured to select at least one bypass valve opening degree map in accordance with the operation mode selected by the operation mode selection part, from among a plurality of bypass valve opening degree maps which represent respective relationships between a plurality of control parameters of the engine and an opening degree of the bypass valve; a bypass valve opening degree determination part configured to determine an opening degree command value for the bypass valve on the basis of the bypass valve opening degree map and control parameter information representing the plurality of control parameters; and a bypass valve opening degree control part configured to control the opening degree of the bypass valve on the basis of the opening degree command value for the bypass valve.

Multi-stage turbo supercharging system

A control device according to the present invention determines whether a demand load demanded of an engine exceeds a load threshold. The control device starts an electric motor if the demand load exceeds the load threshold. If the demand load is equal to or less than the load threshold, the control device performs control such that the degree of opening of an on-off valve increases monotonically with respect to the demand load. The control device switches the on-off valve from an open state to a closed state when the electric motor starts.

Engine system, engine system control device, engine system control method, and program

This control device starts an electric motor on the basis of a drive signal. After starting of the electric motor, the control device switches a bypass valve from an open state to a closed state.

Growing community of inventors

Tokyo, Japan

Yusuke Yashiro