US 12,338,882 B2
Vehicle controller and noise reducing method of differential gear
Youngkyu Kim, Hwaseong-si (KR); Yeonho Kim, Hwaseong-si (KR); and Jong Bae Ahn, Hwaseong-si (KR)
Assigned to Hyundai Transys Incorporated, Seosan-si (KR)
Filed by Hyundai Transys Incorporated, Seosan-si (KR)
Filed on Sep. 13, 2022, as Appl. No. 17/943,325.
Claims priority of application No. 10-2021-0122702 (KR), filed on Sep. 14, 2021.
Prior Publication US 2023/0091095 A1, Mar. 23, 2023
Int. Cl. B60K 23/08 (2006.01); B60K 1/00 (2006.01); B60K 17/02 (2006.01); B60K 17/356 (2006.01); F16H 48/36 (2012.01); B60K 17/16 (2006.01); B60K 17/34 (2006.01); B60K 23/04 (2006.01)
CPC F16H 48/36 (2013.01) [B60K 17/16 (2013.01); B60K 17/20 (2013.01); B60K 17/34 (2013.01); B60K 2023/043 (2013.01); B60K 23/08 (2013.01); B60K 2023/0816 (2013.01); F16H 2048/364 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A vehicle controller for reducing noise of a differential gear of a vehicle, the vehicle including: a ring gear teeth-engaged with a motor reducer, a differential case connected to the ring gear, a differential assembly including differential gears disposed inside the differential case, and a disconnector device connected to at least one of the differential gears, the vehicle controller comprising:
an RPM measuring unit configured to measure a rotational speed of one vehicle wheel when the vehicle is being driven in a two-wheel drive mode;
a speed calculation unit configured to calculate a rotational speed of the ring gear based on the rotational speed of the one vehicle wheel; and
a driving unit configured to drive the ring gear by controlling the motor reducer based on the rotational speed of the ring gear,
wherein the driving unit is configured to, by rotational driving of the ring gear, reduce a number of relative revolutions between a first side gear of the differential gear connected to the one vehicle wheel and disposed inside the differential case and a second side gear of the differential gear connected to the disconnector device and disposed inside the differential case when the vehicle is being driven in the two-wheel drive mode,
wherein the driving unit is configured to reduce the number of relative revolutions between the first side gear and second side gear by two times a number of revolutions of the ring gear per unit of time when the ring gear rotates.