US 12,263,832 B2
Controller for hybrid electric vehicle and method for controlling hybrid electric vehicle
Tomohiro Nakano, Nagoya (JP); Shinichi Oda, Susono (JP); Masanao Idogawa, Nagoya (JP); Koji Ichikawa, Aichi-gun (JP); and Atsushi Fukuda, Nisshin (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Jan. 26, 2023, as Appl. No. 18/159,763.
Claims priority of application No. 2022-029270 (JP), filed on Feb. 28, 2022.
Prior Publication US 2023/0271602 A1, Aug. 31, 2023
Int. Cl. B60W 20/40 (2016.01); B60K 6/40 (2007.10); B60W 10/02 (2006.01); B60W 10/06 (2006.01)
CPC B60W 20/40 (2013.01) [B60K 6/40 (2013.01); B60W 10/02 (2013.01); B60W 10/06 (2013.01); B60W 2510/0208 (2013.01); B60W 2510/0638 (2013.01); B60W 2510/0676 (2013.01); B60W 2510/081 (2013.01); B60W 2710/021 (2013.01); B60W 2710/0644 (2013.01); B60Y 2200/92 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A controller for a hybrid electric vehicle, wherein the hybrid electric vehicle includes an engine, a motor arranged in a power transmission path between the engine and a drive wheel, and a clutch arranged in the power transmission path between the engine and the motor, the controller comprising:
processing circuitry, wherein
the processing circuitry is configured to idle the engine in accordance with a target engine rotation speed and operate the motor in accordance with a target motor rotation speed when the clutch is in a disengagement state,
when the clutch is in the disengagement state and the engine is idling, the target motor rotation speed is less than the target engine rotation speed,
when the clutch is in the disengagement state and the engine is performing a warm-up operation, the processing circuitry is configured to set the target engine rotation speed based on a warm-up state of the engine irrespective of a gearshift position,
the target engine rotation speed that is set based on the warm-up state of the engine is higher when an engine coolant temperature is lower,
when the clutch is in the disengagement state and the engine is performing the warm-up operation, the processing circuitry is configured to set the target motor rotation speed based on the gearshift position and the warm-up state of the engine,
the target motor rotation speed that is set based on the gearshift position and the warm-up state of the engine is higher when the engine coolant temperature is lower,
if the clutch is to be shifted to an engagement state when the clutch is in the disengagement state and the engine is performing the warm-up operation, the processing circuitry is configured to execute:
a process that matches the target engine rotation speed that is greater than the target motor rotation speed with the target motor rotation speed;
a process that waits for an engine rotation speed to match the target engine rotation speed; and
a process that controls and shifts the clutch to the engagement state.