公开(公告)号：US10288028B2

公开(公告)日：2019-05-14

申请号：US15447849

申请日：2017-03-02

Applicant: DENSO CORPORATION

Inventor： Takuro Nakaoka ,  Akihiro Imura

IPC: F02N11/08 ,  F02D35/02 ,  F02N11/00 ,  F02N11/10 ,  F02N15/04 ,  F02N11/04

Abstract: A control device sets reverse rotation period as a cranking prohibition period, and when a start request of an engine is generated during reverse rotation period, cranking is started by driving either or both of the first starter and the second starter when it is detected that a crankshaft is shifted from reverse rotation to forward rotation based on an information of a rotation angle sensor. As a result, the delay from generation of the start request of the engine until cranking is started can be reduced, so that the starting time of the engine can be shortened.

公开(公告)号：US10247160B2

公开(公告)日：2019-04-02

申请号：US15447849

申请日：2017-03-02

Applicant: DENSO CORPORATION

Inventor： Takuro Nakaoka ,  Akihiro Imura

IPC: F02N11/08 ,  F02D35/02 ,  F02N11/00 ,  F02N11/10 ,  F02N15/04 ,  F02N11/04

Abstract: A control device sets reverse rotation period as a cranking prohibition period, and when a start request of an engine is generated during reverse rotation period, cranking is started by driving either or both of the first starter and the second starter when it is detected that a crankshaft is shifted from reverse rotation to forward rotation based on an information of a rotation angle sensor. As a result, the delay from generation of the start request of the engine until cranking is started can be reduced, so that the starting time of the engine can be shortened.

公开(公告)号：US10998838B2

公开(公告)日：2021-05-04

申请号：US16317230

申请日：2017-07-10

Applicant: DENSO CORPORATION

Inventor： Takuro Nakaoka ,  Kiyoshi Fujii

IPC: H02P9/02 ,  H02P21/34 ,  H02P21/32 ,  H02P21/22 ,  H02P6/182 ,  H02P25/22

Abstract: A rotor position judging unit detects a rotor position by utilizing induced voltages generated at respective phases of an armature winding. While a field current flowing through a field winding rises toward a target value (while the field current temporally changes), induced voltages are generated at the respective phases of the armature winding by temporal differentiation of a magnetic flux which interlinks with the armature winding. The rotor position judging unit detects the rotor position (d-axis of a rotor) on a basis of a table containing combination of amplitude ratios and polarities of the induced voltages generated at the respective phases.

公开(公告)号：US09982647B2

公开(公告)日：2018-05-29

申请号：US15408539

申请日：2017-01-18

Applicant: DENSO CORPORATION

Inventor： Akihiro Imura ,  Takuro Nakaoka ,  Atsuyuki Hiruma

IPC: F02N11/08 ,  F02N11/04

CPC classification number: F02N11/0844 ,  F02N11/04 ,  F02N2200/042 ,  F02N2300/104

Abstract: An engine start system has a rotating electrical machine, a starter motor, an engine ECU and an ISG controller. The rotating electrical machine is connected to an output shaft of an engine. The starter motor drives the engine to be restarted. The engine ECU controls the engine operation. The ISG controller instructs an inverter when the rotating electrical machine performs power running and regenerative power generation. The ISG controller communicates with the engine ECU, and adjusts the operation of the starter motor and the rotating electrical machine. When receiving an engine restart request, the ISG controller drives at least one of the starter motor and the rotating electrical machine so as to restart the engine.