Regeneration Control Device for Electric Vehicles
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Solution Overview
Problem
The existing systems for controlling regenerative braking in electric vehicles require frequent operation of the regeneration level selecting unit to change the regeneration level, which burdens the driver and degrades operability and comfort.
Innovation Solution
A regeneration control device that allows the regeneration level to be changed to the highest stage with a single operation on the paddle switch device, either by sequential steps or within a predetermined time, reducing the number of operations needed to select the highest regeneration level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the regeneration level is set into multiple stages, then the regenerative braking force can be adjusted to suit different driving conditions, but the number of operations on the regeneration level selecting unit increases, degrading operability
Solution Approach 1:
The system pre-sets multiple regeneration levels (first through fourth levels) with progressively stronger deceleration forces. When the regeneration level selecting unit is operated, the system automatically progresses through these pre-configured levels in sequence, eliminating the need for the driver to perform multiple separate operations to achieve maximum regeneration. The preliminary arrangement of hierarchical levels resolves the contradiction by making the system adaptable while reducing operational burden.
2Reliability
If the driver operates the regeneration level selecting unit multiple times to change regeneration levels, then the desired deceleration level can be achieved, but the frequent operations burden the driver and degrade comfortability
Solution Approach 1:
The system implements periodic progression through regeneration levels based on operation count. Each operation on the regeneration level selecting unit triggers advancement to the next predefined level in the sequence (first → second → third → fourth level). This periodic action pattern ensures reliable regeneration control while minimizing the frequency and burden of driver operations, thereby improving comfortability.
3Measurement precision
If sequential operation is required to reach the highest regeneration level, then precise control over deceleration stages is achieved, but the time and operations required increase
Solution Approach 1:
The system pre-configures four distinct regeneration levels with progressively increasing deceleration forces. When the regeneration level selecting unit is operated, the system automatically progresses through these pre-established levels in a single sequential action rather than requiring multiple separate operations. This preliminary arrangement maintains precise deceleration control while significantly reducing the time required to reach maximum regeneration level.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution improves operability by allowing the driver to quickly adjust the regeneration level to the highest stage with fewer operations, enhancing the comfort and usability of the vehicle during regeneration operations.
Implementation Method 1
a rotary electric motor is controlled to generate electric power during deceleration of the vehicle etc., that is, regeneration operation is executed so that braking force can be obtained while a battery is charged with the generated electric power
Data Source
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AI summary
A regeneration control device of an electrically driven vehicle configured to control regeneration operation in which rotational energy of wheels is converted and regenerated into electric energy by a rotary electric motor, includes: a regeneration level selecting unit manually operated to select a regeneration level in the regeneration operation; a regeneration level setting unit changing the regeneration level to a stage in accordance with the operation on the regeneration level selecting unit; and a regeneration executing unit executing the regeneration operation in accordance with the stage of the regeneration level changed by the regeneration level setting unit. When a specific operation is performed on the regeneration level selecting unit, the regeneration level setting unit changes the regeneration level to a highest stage in one of an up direction and a down direction.