US 12,233,875 B2
Hybrid all-wheel-drive vehicle
Masaki Takami, Tokyo (JP); Akihiro Nabeshima, Tokyo (JP); Takeshi Yoneda, Tokyo (JP); Hiroshi Tatekawa, Tokyo (JP); Katsuya Higuchi, Tokyo (JP); and Norio Oowada, Tokyo (JP)
Assigned to SUBARU CORPORATION, Tokyo (JP)
Appl. No. 17/928,820
Filed by SUBARU CORPORATION, Tokyo (JP)
PCT Filed Aug. 27, 2021, PCT No. PCT/JP2021/031488
§ 371(c)(1), (2) Date Nov. 30, 2022,
PCT Pub. No. WO2023/026466, PCT Pub. Date Mar. 2, 2023.
Prior Publication US 2024/0217519 A1, Jul. 4, 2024
Int. Cl. B60W 30/188 (2012.01); B60K 6/52 (2007.10); B60W 10/06 (2006.01); B60W 10/08 (2006.01); B60W 10/14 (2012.01); B60W 20/15 (2016.01)
CPC B60W 30/188 (2013.01) [B60K 6/52 (2013.01); B60W 10/06 (2013.01); B60W 10/08 (2013.01); B60W 10/14 (2013.01); B60W 20/15 (2016.01); B60W 2520/10 (2013.01); B60W 2540/103 (2013.01); B60W 2554/60 (2020.02)] 19 Claims
OG exemplary drawing
 
1. A hybrid all-wheel-drive vehicle comprising:
an engine;
a motor generator that is coupled such that torque can be transmitted between the motor generator and a crankshaft of the engine;
a front limited slip differential that is between the engine and the motor generator and left and right front wheels, the front limited slip differential being a torque-sensitive type differential configured to limit a differential between the left and right front wheels in accordance with an input torque;
a center differential unit that is between the left and right front wheels and left and right rear wheels, the center differential unit comprising a center limited slip differential mechanism and being configured to limit a differential of the left and right front wheels and the left and right rear wheels in accordance with an engagement force of the center limited slip differential mechanism, the center differential unit being configured to distribute an input torque to a front wheel side and a rear wheel side;
a rear limited slip differential that is between the center differential unit and the left and right rear wheels, the rear limited slip differential being a torque-sensitive type differential configured to limit a differential between the left and right rear wheels in accordance with an input torque;
an accelerator-operation detection unit configured to detect an operation state of an accelerator;
a bump detection unit configured to detect a bump on a road surface in front of the vehicle; and
a control unit configured to control driving of the engine, driving of the motor generator, and the engagement force of the center limited slip differential mechanism,
wherein the control unit is configured to, in a case where an operation amount of the accelerator exceeds a predetermined value at a time of climbing over the bump detected by the bump detection unit, control the driving of the motor generator and the engagement force of the center limited slip differential mechanism so as to reduce (1) an input torque of the front limited slip differential, (2) an input torque of the rear limited slip differential, or (3) both the input torque of the front limited slip differential and the input torque of the rear limited slip differential, in accordance with one or more wheels being on the bump.