US 12,415,501 B2
Method of controlling hybrid vehicle and control system
Masakazu Ohsako, Aki-gun (JP); and Keisuke Tanaka, Aki-gun (JP)
Assigned to Mazda Motor Corporation, Hiroshima (JP)
Filed by Mazda Motor Corporation, Hiroshima (JP)
Filed on Mar. 23, 2023, as Appl. No. 18/188,748.
Claims priority of application No. 2022-074193 (JP), filed on Apr. 28, 2022.
Prior Publication US 2023/0347874 A1, Nov. 2, 2023
Int. Cl. B60W 10/30 (2006.01); B60K 6/26 (2007.10); B60K 6/387 (2007.10); B60W 10/02 (2006.01); B60W 20/40 (2016.01); B60W 30/194 (2012.01)
CPC B60W 20/40 (2013.01) [B60K 6/26 (2013.01); B60K 6/387 (2013.01); B60W 10/02 (2013.01); B60W 10/30 (2013.01); B60W 30/194 (2013.01); B60W 2510/0208 (2013.01); B60W 2510/0657 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of controlling a hybrid vehicle including an engine, a motor, a starter configured to start the engine, a friction engagement element provided between the engine and the motor so as to be engageable and disengageable, a mechanical oil pump configured to be driven by the motor and supply oil to the friction engagement element, and an electric oil pump configured to supply oil to the friction engagement element, separately from the mechanical oil pump, wherein when the friction engagement element is in a disengaged state, a first traveling mode in which the hybrid vehicle travels using torque of the motor without using torque of the engine is performed, and when the friction engagement element is in an engaged state, a second traveling mode in which the hybrid vehicle travels at least using the torque of the engine is performed, the method comprising steps of:
determining whether the first traveling mode is performable during a startup of the hybrid vehicle;
starting the engine by the starter to perform the second traveling mode, when the first traveling mode is determined to be unperformable;
activating the motor after starting the engine; and
performing a hydraulic pressure control for applying a hydraulic pressure to the friction engagement element so that the friction engagement element shifts from the disengaged state to the engaged state after starting the engine,
wherein performing the hydraulic pressure control uses a hydraulic pressure from the mechanical oil pump driven by activating the motor and a hydraulic pressure from the electric oil pump,
wherein performing the hydraulic pressure control is started substantially at the same time as start of activation of the motor, and
wherein the electric oil pump is activated before the mechanical oil pump is activated.