US 11,951,973 B2
Technical field of method of controlling electric vehicle and drive system of electric vehicle
Takayuki Kagaya, Kanagawa (JP); Masato Koga, Kanagawa (JP); Yuuki Nakajima, Kanagawa (JP); Katsunori Tanaka, Kanagawa (JP); and Tetsuya Iwasaki, Kanagawa (JP)
Assigned to Nissan Motor Co., Ltd., Kanagawa (JP)
Appl. No. 17/280,617
Filed by Nissan Motor Co., Ltd., Kanagawa (JP)
PCT Filed Sep. 26, 2018, PCT No. PCT/JP2018/035812
§ 371(c)(1), (2) Date Mar. 26, 2021,
PCT Pub. No. WO2020/065800, PCT Pub. Date Apr. 2, 2020.
Prior Publication US 2022/0118966 A1, Apr. 21, 2022
Int. Cl. B60W 20/20 (2016.01); B60K 6/442 (2007.10); B60W 20/40 (2016.01)
CPC B60W 20/20 (2013.01) [B60K 6/442 (2013.01); B60W 20/40 (2013.01); B60W 2510/0208 (2013.01); B60W 2520/10 (2013.01); B60W 2520/105 (2013.01); B60W 2520/12 (2013.01); B60W 2520/125 (2013.01); B60W 2540/12 (2013.01); B60Y 2200/92 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A control method of an electric vehicle provided with:
an internal combustion engine;
a generating motor provided configured to generate electricity by receiving motive force from the internal combustion engine; and
a travel motor configured to be driven by electric power generated by the generating motor,
wherein the internal combustion engine and a drive wheel are linked via a first clutch so as to be unlinkable/linkable, and the travel motor and the drive wheel are connected with a motive force transmission path on which a second clutch is located, and a travel motor side of the motive force transmission path and a drive wheel side of the motive force transmission path are linked via the second clutch so as to be unlinkable/linkable, and and
the electric vehicle being configured to switch between a series hybrid mode and an engine direct connected mode, the series hybrid mode being a mode in which the travel motor is used as a drive power source such that the electric vehicle travels by transmitting motive force from the travel motor to the drive wheel, the engine direct connected mode being a mode in which at least one of the internal combustion engine and the generating motor is used as a drive power source such that the electric vehicle travels by transmitting motive force from the drive power source to the drive wheel,
wherein
at a mode switching time from the engine direct connected mode to the series hybrid mode, starting a rotation synchronization matching a rotation speed of the travel motor side of the motive force transmission path and a rotation speed of the drive wheel side of the motive force transmission path, and engaging the travel motor side of the motive force transmission path and the wheel side of the motive force transmission path by the second clutch after completing the rotation synchronization, and wherein
at the mode switching time involving deceleration, when the rotation synchronization or an engagement by the second clutch is not completed before a vehicle speed is decelerated to a predetermined vehicle speed, the first clutch is disengaged before the engagement by the second clutch is completed.