US 11,919,506 B2
Vehicle
Yuya Tachibanada, Tokyo (JP); Shintaro Kameda, Tokyo (JP); Tetsuya Matsumoto, Tokyo (JP); Shinobu Kurachi, Tokyo (JP); and Sadahito Kajihara, Tokyo (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Jan. 14, 2022, as Appl. No. 17/576,508.
Claims priority of application No. 2021-006002 (JP), filed on Jan. 18, 2021.
Prior Publication US 2022/0227352 A1, Jul. 21, 2022
Int. Cl. B60K 6/38 (2007.10); B60K 6/48 (2007.10); B60W 10/02 (2006.01); B60W 10/06 (2006.01); B60W 10/08 (2006.01); B60W 20/40 (2016.01)
CPC B60W 20/40 (2013.01) [B60K 6/48 (2013.01); B60W 10/02 (2013.01); B60W 10/06 (2013.01); B60W 10/08 (2013.01); B60K 2006/4825 (2013.01); B60W 2710/0644 (2013.01); B60W 2710/081 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A vehicle comprising:
an internal combustion engine;
a rotary electric machine configured to rotationally drive the internal combustion engine;
a connection-disconnection device provided to connect and disconnect a power transmission path between the internal combustion engine and a drive wheel, the connection-disconnection device being configured to connect the power transmission path in response to supply of hydraulic pressure equal to or higher than a predetermined value;
a hydraulic pressure supply device configured to supply hydraulic pressure to the connection-disconnection device;
a hydraulic pressure control device configured to control the supply of the hydraulic pressure supplied by the hydraulic pressure supply device to the connection-disconnection device; and
a control device configured to control the internal combustion engine and the rotary electric machine, wherein:
the hydraulic pressure supply device includes:
a mechanical hydraulic pressure supply device that is driven in accordance with rotation of the internal combustion engine to supply the hydraulic pressure to the connection-disconnection device; and
a pressure accumulator configured to supply the hydraulic pressure to the connection-disconnection device by pressure accumulated in advance;
the control device executes:
fuel cut-off control to stop fuel supply to the internal combustion engine based on a deceleration command given to the vehicle;
rotation speed maintaining control to maintain a rotation speed of the internal combustion engine at a predetermined rotation speed larger than 0 by rotationally driving the internal combustion engine by the rotary electric machine or supplying fuel to the internal combustion engine when the rotation speed of the internal combustion engine decreases to a predetermined rotation speed along with the execution of the fuel cut-off control; and
the rotation speed maintaining control, at any timing from when the rotation speed of the internal combustion engine decreases to the predetermined rotation speed to when a speed of the vehicle becomes equal to or less than a threshold value, from when the rotation speed of the internal combustion engine decreases to the predetermined rotation speed to when an acceleration command is given to the vehicle, or from when the rotation speed of the internal combustion engine decreases to the predetermined rotation speed to when a predetermined period elapses; and
the hydraulic pressure control device supplies the hydraulic pressure to the connection-disconnection device by the pressure accumulator when the hydraulic pressure supplied to the connection-disconnection device by the mechanical hydraulic pressure supply device is less than the predetermined value when the acceleration command is given to the vehicle.