Patent ID: 11904684
Assignee: HYUNDAI MOTOR COMPANY
Field: Transport (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 0:
1. A system for controlling switching of an electric vehicle to four-wheel drive comprising:
a first motor connected to main drive wheels and configured to output a first torque;
a second motor connected to subsidiary drive wheels and configured to output a second torque;
a disconnector mounted on an axle shaft for the subsidiary drive wheels;
a driver requested torque detector configured to detect a driver requested torque; and
a controller configured to:
release a set output limit of the first motor for a designated time and simultaneously release a set output limit of the second motor when the driver requested torque is greater than or equal to a reference requested torque; and
control the first motor to output a maximum torque exceeding the set output limit to the main drive wheels until the disconnector is engaged.