Regenerative Braking Coordination Device with Dynamic Operation Amount Absorber
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing regenerative braking systems face challenges in rapidly responding to high braking forces, as they often delay the generation of hydraulic braking force, leading to reduced braking efficiency and responsiveness when the brake pedal operation speed is high.
Innovation Solution
A regenerative braking coordination device that includes an operation amount absorber with a cylinder and orifice, which adjusts the absorption of the operation amount based on the brake pedal speed, allowing for earlier generation of both regenerative and hydraulic braking forces, thereby enhancing braking force response and electric power recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If regenerative braking and friction braking are both performed for high braking force, then braking force is improved, but braking response time deteriorates when brake pedal operation speed is high
Solution Approach 1:
The operation amount absorber dynamically adjusts its absorption characteristics based on the brake pedal operation speed. When operation speed is high, the absorber provides less absorption, allowing faster transmission of operation amount to the hydraulic braking device for quicker response. When operation speed is low, the absorber provides more absorption to extend the operation amount and prioritize regenerative braking. This dynamic adaptation resolves the contradiction between braking force and response time.
Solution Approach 2:
The system changes the parameter of operation amount absorption based on the detected brake pedal operation speed. The operation amount absorber modifies its absorption ratio according to the operation speed parameter, enabling the system to optimize the balance between regenerative braking and hydraulic braking in real-time, thus achieving both sufficient braking force and appropriate response time under different operating conditions.
2Speed
If friction braking proportion is increased for high operation speed, then braking response is improved, but regenerative braking efficiency deteriorates
Solution Approach 1:
The operation amount absorber dynamically adjusts the absorption ratio based on brake pedal operation speed. At high operation speeds, it reduces absorption to enable faster hydraulic braking response. At low operation speeds, it increases absorption to extend the operation amount and maximize regenerative braking efficiency, thereby reducing energy loss. This dynamic adjustment optimizes the trade-off between response speed and energy recovery.
Solution Approach 2:
The system changes the operation amount absorption parameter according to the detected operation speed, enabling optimal distribution between regenerative and friction braking across different speed ranges, thus minimizing energy loss while maintaining adequate braking response.
3Loss of energy
If operation amount is absorbed more when brake pedal speed is low, then regenerative braking efficiency is improved, but hydraulic braking force generation is delayed
Solution Approach 1:
The operation amount absorber dynamically adjusts its absorption characteristics based on the detected brake pedal operation speed. When operation speed is low, it absorbs more operation amount to extend the duration for regenerative braking. When operation speed is high, it absorbs less operation amount to enable faster transmission to the hydraulic braking device, ensuring timely hydraulic braking force generation. This dynamic adjustment resolves the contradiction between regenerative braking efficiency and hydraulic braking response time.
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
The device ensures high braking force generation with excellent responsiveness by increasing the hydraulic braking force when the brake pedal speed is high and maximizing regenerative braking force when the speed is low, improving overall braking efficiency and electric power recovery.
Implementation Method 1
a piston dividing an interior of the cylinder into a first hydraulic chamber and a second hydraulic chamber and an orifice connecting the first hydraulic chamber and the second hydraulic chamber
Data Source
AI summary
A regenerative braking coordination device has a braking operating member receiving an input from a driver in the form of an operation amount, an input shaft operable for transmitting the operation amount, and a braking force boosting device operable to generate a hydraulic braking pressure corresponding to the operation amount transmitted by the input shaft. The device further includes a hydraulic pressure braking device to generate a braking force and an operation amount absorber for absorbing the operation amount of the input shaft. The operation amount absorber includes a cylinder, a piston dividing the interior of the cylinder into first and second hydraulic chambers and an orifice connecting the first and second hydraulic chambers. The orifice can be in the piston or in a flow channel.