US 8,977,416 B2 · Electric vehicle and method for controlling emergency thereof

Abstract

An electric vehicle includes a sensor unit for measuring a vehicle state, an interface unit for receiving vehicle control setting parameters from a vehicle driver, a main controller for operating and controlling the electric vehicle in response to input data from the sensor unit and the interface unit, and a sub controller for diagnosing the main controller in response to state information and driving information received from the main controller, and performing emergency control of the vehicle when a malfunction occurs in the main controller, instead of the main controller, The sub controller, under the emergency control, controls acceleration and deceleration of the vehicle, establishes a limit range of speed and torque of the vehicle, and controls the vehicle to be driven within the limit range.

Claims22

Dependent claims

An electric vehicle comprising:

a sensor unit for measuring a vehicle state;
an interface unit for receiving vehicle control setting parameters from a vehicle driver;
a main controller for operating and controlling the electric vehicle in response to input data from the sensor unit and the interface unit;
and
a sub controller for diagnosing the main controller in response to state information and driving information received from the main controller, and performing emergency control of the vehicle when a malfunction occurs in the main controller, instead of the main controller,
wherein the sub controller, under the emergency control, controls acceleration and deceleration of the vehicle, establishes a limit range of speed and torque of the vehicle, and controls the vehicle to be driven en within the limit range.

3 more elements

A method for performing emergency control of an electric vehicle comprising:

generating, by each of the main controller and the sub controller, control information for vehicle control according to input data from at least one sensor, and outputting the generated control information to a motor control unit;
determining whether a malfunction occurs in the motor control unit according to whether there is a response from the motor control unit;
when the motor control unit normally operates, allowing control information to be communicated between the main controller and the sub controller, comparing the received control information with the generated control information, and outputting an operation stop command to the motor controller when there is a difference in control information between the main controller and the sub controller;
and
when a malfunction occurs in the motor control unit, cutting off power supplied to the motor control unit through power relay assembly (PRA) control such that the vehicle performs emergency stop.

2 more elements

Dependencies are inferred from the claim text.

Electric vehicle and method for controlling emergency thereof

Life of this patent

Electric vehicle and method for controlling emergency thereof

Life of this patent

Abstract

Claims22