US 11,834,031 B2
Vehicle control system
Takumi Hoshi, Tokyo (JP); Fumiyuki Moriya, Tokyo (JP); and Tatsuhiro Kubo, Tokyo (JP)
Assigned to SUBARU CORPORATION, Tokyo (JP)
Filed by SUBARU CORPORATION, Tokyo (JP)
Filed on Jul. 23, 2021, as Appl. No. 17/383,539.
Claims priority of application No. 2020-134161 (JP), filed on Aug. 6, 2020.
Prior Publication US 2022/0041154 A1, Feb. 10, 2022
Int. Cl. B60W 20/11 (2016.01); B60W 10/06 (2006.01); B60W 10/08 (2006.01); B60W 10/26 (2006.01); B60W 20/15 (2016.01); B60W 10/188 (2012.01); B60W 20/13 (2016.01)
CPC B60W 20/11 (2016.01) [B60W 10/06 (2013.01); B60W 10/08 (2013.01); B60W 10/188 (2013.01); B60W 10/26 (2013.01); B60W 20/13 (2016.01); B60W 20/15 (2016.01); B60W 2510/087 (2013.01); B60W 2510/244 (2013.01); B60W 2510/246 (2013.01); B60W 2710/18 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A vehicle control system configured to control a vehicle including an engine and a motor as drive sources, the motor being configured to be driven by electric power supplied from a battery, the vehicle control system comprising at least one machine readable medium storing instructions and at least one processor configured to execute the instructions to:
calculate target drive force of the vehicle;
calculate required drive force and required brake force on a basis of the target drive force, the required drive force being used to control driving of the engine and the motor, the required brake force being used to control hydraulic brake;
in a case where stop-timing brake force corresponding to the required brake force at a vehicle stop timing is not greater than or equal to stop hold brake force required to hold the vehicle in a stopped state, hold the vehicle in the stopped state by boosting a brake fluid pressure to cause brake force to be the stop hold brake force or greater;
calculate, on a basis of an output power capacity of the battery, power-running-generative drive force that the motor is able to generate during power running;
select, in a case where the target drive force is greater than the power-running-generative drive force, an engine traveling mode in which the engine is driven;
select, in a case where the target drive force is less than or equal to the power-running-generative drive force, an electric vehicle traveling mode in which the engine is stopped;
calculate the required drive force by setting the required brake force to the stop hold brake force or greater in a case where the engine traveling mode is selected at an immediately preceding timing immediately before the vehicle stop timing; and
calculate the required brake force by setting the required drive force to the power-running-generative drive force or less in a case where the electric vehicle traveling mode is selected at the immediately preceding timing.