US 11,654,878 B2
Control device for vehicular transfer
Tetsuro Tamura, Hitachinaka (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Appl. No. 17/438,730
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed May 20, 2020, PCT No. PCT/JP2020/019924
§ 371(c)(1), (2) Date Sep. 13, 2021,
PCT Pub. No. WO2020/235590, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. JP2019-094784 (JP), filed on May 20, 2019.
Prior Publication US 2022/0126809 A1, Apr. 28, 2022
Int. Cl. B60W 10/02 (2006.01); B60K 17/348 (2006.01); B60W 30/188 (2012.01); B60W 40/10 (2012.01); B60W 40/12 (2012.01)
CPC B60W 10/02 (2013.01) [B60K 17/348 (2013.01); B60W 30/188 (2013.01); B60W 40/10 (2013.01); B60W 40/12 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A control device for a vehicular transfer which changes a distribution ratio of torque to be distributed from a clutch to a predetermined wheel by changing a pressing force with which the clutch is pressed by a rotary output shaft of a reducer driven by an electric motor,
the control device comprising:
a driver circuit that drives the electric motor;
a current sensor that detects an actual current of the electric motor; and
a control circuit that calculates, when the distribution ratio is newly set or is changed, a holding current, as a target current, that is required to be supplied to the electric motor to maintain the distribution ratio and performs current feedback control by calculating an operation amount of the electric motor so as to adjust the actual current to the target current, and then outputs to the driver circuit a drive signal corresponding to the operation amount.