CONTROL DEVICE FOR ELECTRIC SUPERCHARGING MECHANISM

Japanese Patent JP3826887

B2

PROBLEM TO BE SOLVED: To prevent torque difference generated by increase in rotational speed of an electric motor exceeding a target value between the time when a closing instruction is input to a bypass valve and the time when closing operation of the valve is completed.
SOLUTION: A control device comprises: a turbocharger 3; an electric supercharger 4 disposed downstream of the turbocharger 3; a bypass passage 10 bypassing the electric supercharger 4 and connecting upstream of the electric supercharger 4 with downstream of the electric supercharger 4; a bypass valve opening/closing the bypass passage 10; and a means 16 detecting acceleration requirement of a vehicle. The control device associates the electric supercharger 4 with the bypass valve 6 to control them, when the acceleration requirement is detected. The control device further comprises a control means. The control means sets, as a target rotational speed, a rotational speed where an air amount flowing in the intake passage 12 downstream of the electric motor 4b is not larger than an air amount of upstream, calculates a predicted rotational speed after operation time of the opening/closing valve 6 based on a rotational number of the electric motor 4b at present time, and outputs closing instruction to the bypass valve 6 when the predicted rotational speed reaches the target rotational speed.

Katsuhiko Kawamura
Kenichi Fujimura

JP2003016201A

September 27, 2006

January 24, 2003

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Nissan Motor Co., Ltd

F02B39/10; F02B37/00; F02B37/04; F02B37/12; F02D23/00; (IPC1-7): F02B39/10; F02B37/00; F02B37/04; F02B37/12; F02D23/00

JP2002021573A
JP10077853A
JP2001323818A
JP2002038961A

Masaki Goto
Yoshio Matsuda

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