Two-Wheeled Brake Control Device for Natural Lever Feel
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing two-wheeled motor vehicle braking systems, particularly those with front-and-rear-wheel-interlocked braking, often result in unnatural operation feelings for the driver due to pressure imbalances and complex circuit configurations, leading to suboptimal braking experiences.
Innovation Solution
A braking control system that separates the interlocked brake from the non-interlocked brake within the hydraulic circuit, allowing for improved pressure response characteristics and natural operation feelings by directly transmitting hydraulic pressure to the non-interlocked brake without changing valve states, thus enhancing the driver's braking experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a front-and-rear-wheel-interlocked braking system is implemented, then balance of braking force between front and rear wheels is controlled, but pressure in the front-wheel-side master cylinder is increased causing unnatural braking feeling
Solution Approach 1:
The front-wheel brake circuit is divided into two independent parts: an interlocked brake circuit (front-wheel-side first brake circuit) and a non-interlocked brake circuit (front-wheel-side second brake circuit). This segmentation allows the interlocked braking function to maintain braking force balance while the non-interlocked circuit preserves natural brake lever operation feeling by not being affected by the pressure increase from interlocked braking.
2Ease of operation
If a reaction generator is added to simulate braking operation feeling, then variation in hydraulic pressure is not transmitted to the driver, but the system becomes more complicated with more components
Solution Approach 1:
The non-interlocked brake circuit extracts and isolates the brake lever operation function from the interlocked braking system. By providing a separate circuit path that bypasses the interlocked braking pressure control, the system maintains simple direct transmission of brake lever operation to the front-wheel brake without requiring complex reaction generators or simulation mechanisms.
3Ease of operation
If the brake lever operation is separated from the interlocked brake circuit, then operation feeling is improved, but the interlocked braking function may be compromised
Solution Approach 1:
Different parts of the front-wheel brake system are given different functions: the interlocked brake circuit (first brake circuit) is optimized for maintaining braking force balance and preventing wheel lock, while the non-interlocked brake circuit (second brake circuit) is optimized for providing natural brake lever operation feeling. Both circuits work together on the same front-wheel brake to achieve both goals simultaneously.
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 system provides a more natural operation feeling for the driver by reducing pressure volume increases in the front-wheel hydraulic circuit and improving response characteristics, ensuring a smoother and more intuitive braking experience during both front-and-rear-wheel-interlocked operations.
Implementation Method 1
a front-wheel hydraulic circuit 100... a hydraulic pump 119... when the front-wheel hydraulic circuit 100 is increased in pressure
Implementation Method 2
backflow check means such as a check valve is provided in a pipeline for connecting between two wheel cylinders
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An object of the invention is to provide a braking control system of a two-wheeled motor vehicle, by which when a front-and-rear-wheel-interlocked brake operates, operation feeling of a brake lever is improved, and consequently more natural operation feeling may be provided. A braking control system of a two-wheeled motor vehicle according to the invention performs front-and-rear-wheel-interlocked braking control that allows a front-wheel brake and a rear-wheel brake to operate in an interlocked manner. The front-wheel brake is configured of a front-wheel first brake and a front-wheel second brake. ECU 400 controls a front-wheel hydraulic circuit 100 so that the first brake operates according to the front-and-rear-wheel-interlocked braking control. Furthermore, the ECU 400 controls the front-wheel hydraulic circuit 100 so that the front-wheel second brake receives hydraulic pressure caused along with operation of a brake lever 101 during performing the front-and-rear-wheel-interlocked braking control. Thus, operation feeling of the brake lever 101 is improved.