Electrified Vehicle Mode Switching for Stable Auxiliary Operation
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Solution Overview
Problem
Drivers of electrified vehicles experience a feeling of strangeness due to rapid changes in electric power consumption modes, particularly when auxiliary machines like air-conditioning devices are quickly turned on and off.
Innovation Solution
Implementing a control device that manages mode switches in an electrified vehicle to prevent immediate transitions to power-restricted modes unless a predetermined time has elapsed since the last switch operation, ensuring stable operation of auxiliary machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the mode switch is operated to switch between first mode, third mode and second mode in order, then electric power consumption is restricted in the third mode, but the auxiliary machine is quickly turned on and off causing driver strangeness
Solution Approach 1:
The control device checks whether the mode switch has been operated within a predetermined time period before executing the mode switch instruction. This preliminary check prevents rapid consecutive switching that would cause the auxiliary machine to turn on and off quickly, thereby avoiding driver strangeness while still allowing power consumption restriction when appropriately requested
2Productivity
If the mode switch operates consecutively to switch from first mode to third mode and then to second mode, then power consumption is restricted and quickly cancelled, but the auxiliary machine operation becomes unstable
Solution Approach 1:
Before executing the mode switch from first mode to third mode, the control device preliminarily determines whether the mode switch operation occurred within the predetermined time period. This prevents unstable rapid switching that would cause the auxiliary machine to frequently turn on and off, ensuring stable operation while maintaining responsive mode switching when appropriate
Data Source
AI summary
An electrified vehicle includes: a mode switch that gives an instruction of switching being performed in order of a first mode, a third mode and a second mode, among the first mode, the second mode and the third mode; and a control device that sets a traveling mode to one of the modes in accordance with the mode switch operation and controls a motor and an auxiliary machine in accordance with the traveling mode. When the mode switch has been operated while the traveling mode is the first mode, the control device switches the traveling mode from the first mode to the second mode without the switching to the third mode, if the mode switch has been operated again within a predetermined time, and switches the traveling mode from the first mode to the third mode, if the mode switch has not been operated again within the predetermined time.