US 12,240,439 B2
Hybrid electric vehicle
Hiroya Tanaka, Nagoya (JP); Motoshi Asada, Chiryu (JP); Mitsuru Yamaguchi, Ama (JP); and Masato Yoshikawa, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Oct. 12, 2022, as Appl. No. 18/045,869.
Claims priority of application No. 2022-007886 (JP), filed on Jan. 21, 2022.
Prior Publication US 2023/0234556 A1, Jul. 27, 2023
Int. Cl. B60W 20/15 (2016.01); B60W 10/02 (2006.01); B60W 10/08 (2006.01); B60W 10/26 (2006.01)
CPC B60W 20/15 (2016.01) [B60W 10/02 (2013.01); B60W 10/08 (2013.01); B60W 10/26 (2013.01); B60W 2510/0676 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A hybrid electric vehicle comprising:
an engine;
a motor provided on a power transmission path from the engine to a drive wheel;
a clutch provided between the engine and the motor on the power transmission path;
a battery configured to charge regenerative electric power of the motor; and
a control device configured to control the engine, the motor, and the clutch, the control device includes:
a charge determination unit configured to determine whether the battery is chargeable when there is a deceleration request due to an accelerator being turned off, the charge determination unit making a first negative determination being the charge determination unit determining that the battery is not chargeable, the charge determination unit making a first positive determination being the charge determination unit determining that the battery is chargeable;
a deceleration control unit configured to:
execute, when the charge determination unit makes the first negative determination, a first deceleration process for decelerating the hybrid electric vehicle by friction torque of the engine by executing a fuel cut in the engine while the clutch is engaged and the motor is stopped,
execute, when the charge determination unit makes the first positive determination, a second deceleration process for decelerating the hybrid electric vehicle by regenerative torque of the motor while the clutch is released, and
cause, in the second deceleration process, the motor to output the friction torque at a rotational speed of the engine corresponding to a rotational speed of the motor as the regenerative torque; and
a stop determination unit configured to determine whether an intermittent stop of the engine is possible when there is the deceleration request, the stop determination unit making a second positive determination being the stop determination unit determining that the intermittent stop of the engine is possible, the stop determination unit making a second negative determination being the stop determination unit determining that the intermittent stop of the engine is not possible,
wherein the deceleration control unit is configured to:
execute the second deceleration process when the charge determination unit makes the first positive determination, and the stop determination unit makes the second positive determination;
execute, when the charge determination unit makes the first positive determination and the stop determination unit makes the second negative determination, a third deceleration process for decelerating the hybrid electric vehicle by the regenerative torque of the motor in a state where the clutch is engaged and the engine outputs idle torque; and
cause, in the third deceleration process, the motor to output a total value of negative torque having an amount corresponding to the idle torque and the friction torque as the regenerative torque.