Regenerative Brake Control Device with Automatic Stage Adjustment
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Solution Overview
Problem
Existing regenerative brake control systems for electric vehicles require time-consuming operations to adjust regeneration amounts, affecting drivability and operability due to the need for manual selection of regeneration stages and time-dependent operations.
Innovation Solution
A regenerative brake control device that includes a selecting section for manually choosing regeneration stages and a control section that automatically changes the current regeneration stage to a target stage upon a predetermined operation, such as a double-click, allowing for quicker adjustment of regenerative brake force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the regeneration amount is adjusted by manual operation on the selecting section, then the driver can control the deceleration state, but it takes time to obtain the desired deceleration feeling
Solution Approach 1:
The control section automatically changes the regeneration stage in advance based on detected deceleration conditions, so that when the driver operates the selecting section, the desired regeneration amount is already available or closer to available, reducing the time to achieve desired deceleration feeling
Solution Approach 2:
The control section continuously monitors deceleration conditions and provides feedback by automatically adjusting the regeneration stage, creating a closed-loop system that responds to driving conditions and driver input more quickly than manual adjustment alone
2Adaptability or versatility
If the regeneration stage is changed in accordance with operation time on the selecting section, then the regeneration amount can be adjusted, but the operation time is required to obtain the desired deceleration feeling
Solution Approach 1:
The control section performs preliminary automatic adjustment of the regeneration stage based on detected deceleration conditions before or during driver operation, so that less operation time is needed to reach the desired regeneration amount
Solution Approach 2:
The control section serves itself by automatically detecting deceleration conditions and autonomously changing the regeneration stage, reducing the burden on the driver and eliminating the need for prolonged manual operation to achieve the desired effect
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 and drivability by reducing the time needed to achieve desired deceleration feelings and allows for more efficient control of regenerative brake force, enhancing the overall driving experience, especially during sporty traveling and cornering.
Implementation Method 1
the rotary electric motor is regeneratively driven during deceleration to obtain regenerative brake force. In addition, kinetic energy of the vehicle is recovered as electric energy into the battery due to regenerative power generation
Data Source
AI summary
A regenerative brake control device of a vehicle, which is configured to control a rotary electric motor that is configured to drive wheels at a regeneration ratio corresponding to a selected regeneration stage to thereby obtain a regenerative brake force, includes: a selecting section which is manually operated to select a regeneration stage from a plurality of regeneration stages which have been set; and a control section which is configured to make control so that, when a predetermined operation is performed on the selecting section, a regeneration stage in which the predetermined operation has not been performed on the selecting section is automatically changed to another regeneration stage.