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US 10,648,402 B2Granted
Supercharging system, control device for supercharging system, control method for supercharging system, and program
AssigneeMitsubishi Heavy Industries Engine & Turbocharger, Ltd.
InventorsYusuke Yashiro, Yoshihiro Hayashi, Byeongil An, Yuuji Wakai
Life of this patent
Estimating the term…
Abstract
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.
Claims14
A control device for a turbocharging system including
- a first compressor which is provided in an intake flow path through which intake air supplied to an engine flows and is driven to compress the intake air,
- an electric motor which drives the first compressor,
- a second compressor which is provided in the intake flow path and compresses the intake air,
- a turbine which is provided in an exhaust system through which exhaust air from the engine flows and is rotated by the exhaust air so as to drive the second compressor,
- a bypass flow path which is connected to the intake flow path and bypasses the first compressor, and
- an on-off valve which opens or closes the bypass flow path,
- the control device comprising:
- an electric motor control unit which starts the electric motor;
- a valve control unit which switches the on-off valve from an open state to a closed state after the electric motor is started by the electric motor control unit;
- and
- a second acquisition unit which acquires a physical quantity relating to a rotation of the second compressor;
- wherein the electric motor control unit stops the electric motor in a case where the physical quantity acquired by the second acquisition unit exceeds a predetermined threshold value,
- wherein the valve control unit switches the on-off valve from the closed state to the open state with a transition time set in conjunction with a rotation speed of the electric motor, and
- wherein the valve control unit increases an opening degree of the on-off valve by an opening degree corresponding to a decrease of the rotation speed with respect to the target rotation speed of the electric motor.
11 more elements
A control method for a turbocharging system including
- a first compressor which is provided in an intake flow path through which intake air supplied to an engine flows and is driven to compress the intake air,
- an electric motor which drives the first compressor,
- a second compressor which is provided in the intake flow path and compresses the intake air,
- a turbine which is provided in an exhaust system through which exhaust air from the engine flows and is rotated by the exhaust air so as to drive the second compressor,
- a bypass flow path which is connected to the intake flow path and bypasses the first compressor, and
- an on-off valve which opens or closes the bypass flow path,
- the control method comprising:
- starting the electric motor;
- switching the on-off valve from an open state to a closed state after the electric motor starts;
- stopping the electric motor in a case where the physical quantity relating to a rotation of the second compressor exceeds a predetermined threshold value;
- switching the on-off valve from the closed state to the open state with a transition time set in conjunction with a rotation speed of the electric motor;
- and
- increasing an opening degree of the on-off valve by an opening degree corresponding to a decrease of the rotation speed with respect to the target rotation speed of the electric motor.
10 more elements
A program for causing a computer of a control device for a turbocharging system including
- a first compressor which is provided in an intake flow path through which intake air supplied to an engine flows and is driven to compress the intake air,
- an electric motor which drives the first compressor,
- a second compressor which is provided in the intake flow path and compresses the intake air,
- a turbine which is provided in an exhaust system through which exhaust air from the engine flows and is rotated by the exhaust air so as to drive the second compressor,
- a bypass flow path which is connected to the intake flow path and bypasses the first compressor, and
- an on-off valve which opens or closes the bypass flow path, to execute:
- starting the electric motor;
- switching the on-off valve from an open state to a closed state after the electric motor starts;
- stopping the electric motor in a case where the physical quantity relating to a rotation of the second compressor exceeds a predetermined threshold value;
- switching the on-off valve from the closed state to the open state with a transition time set in conjunction with a rotation speed of the electric motor;
- and
- increasing an opening degree of the on-off valve by an opening degree corresponding to a decrease of the rotation speed with respect to the target rotation speed of the electric motor.
9 more elements
Dependencies are inferred from the claim text.