Motorcycle ABS Control Unit Dynamic Pressure Increase
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Solution Overview
Problem
Conventional motorcycle braking systems with ABS mechanisms face challenges in achieving high braking force, especially on varying road surfaces, due to unexpected activation and slow pressure increase after wheel lock release, leading to inefficient braking performance.
Innovation Solution
A braking system for motorcycles that includes a hydraulic pressure supply mechanism, braking force generating mechanism, operation member, ABS mechanism, locked state detection, and a control unit that adjusts hydraulic pressure based on wheel acceleration and operation amount to swiftly increase pressure when the locked state is released, ensuring high braking force generation irrespective of road conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydraulic pressure is increased gently after wheel lock release, then the risk of repeated wheel locking is reduced, but the braking force recovery is delayed
Solution Approach 1:
The system dynamically adjusts the pressure increase speed based on real-time wheel acceleration detection. When wheel acceleration exceeds a threshold indicating unexpected ABS activation, the system switches to high-speed pressure increase; otherwise, it uses gentle pressure increase to prevent repeated locking.
Solution Approach 2:
The control unit changes the hydraulic pressure increase parameter (speed) based on the detected wheel acceleration condition. The pressure increase speed is set to a first speed under normal conditions and a second speed (higher than the first) when unexpected activation is detected, optimizing both safety and performance.
2Productivity
If hydraulic pressure is increased quickly after wheel lock release, then braking force is recovered rapidly, but the wheel may be repeatedly locked
Solution Approach 1:
The system uses wheel acceleration detection as feedback to determine the appropriate pressure increase strategy. By monitoring whether wheel acceleration exceeds the threshold, the system receives real-time feedback on road conditions and adjusts pressure increase speed accordingly, preventing repeated locking while enabling rapid recovery when appropriate.
Solution Approach 2:
The pressure increase strategy is made dynamic rather than fixed. The system transitions between two pressure increase modes (first speed and second speed) based on real-time detection of wheel acceleration, allowing optimal performance across varying road conditions.
3Reliability
If ABS mechanism is activated on bad roads with large wheel speed variations, then wheel lock is prevented, but braking performance is reduced due to unexpected activation
Solution Approach 1:
The system changes the hydraulic pressure control parameter based on detected wheel acceleration characteristics. When large speed variations are detected but acceleration remains within normal ranges, the system identifies this as unexpected activation and applies high-speed pressure increase to maintain braking performance while preventing actual wheel locking.
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 effectively generates a high braking force by rapidly increasing hydraulic pressure when the locked state is released, preventing wheel re-locking and improving braking performance on all road surfaces, even during unexpected ABS activation.
Implementation Method 1
a hydraulic pressure supply mechanism (40a, 40b), a braking force generating mechanism (35, 36) which generates a braking force by being supplied with hydraulic pressure from the hydraulic pressure supply mechanism (40a, 40b)
Implementation Method 2
an ABS mechanism (24, 26) which reduces hydraulic pressure supplied to the braking force generating mechanism (35, 36)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A control unit (28) causes ABS mechanisms (24), (26) to reduce hydraulic pressure supplied to braking force generating mechanisms (35), (36) when a locked state of wheels (17), (15) is detected. When the locked state of the wheels (17), (15) is released during driving of the ABS mechanisms (24), (26), the control unit (28) causes the ABS mechanisms (24), (26) to increase hydraulic pressure supplied to the braking force generating mechanisms (35), (36). If an operation amount of operation members (18), (13) is equal to or less than a predetermined operation amount when the locked state of the wheels (17), (15) is released during driving of the ABS mechanisms (24), (26), the control unit (28) increases hydraulic pressure supplied to the braking force generating mechanisms (35), (36) at higher pressure-increase speed than that when the operation amount of the operation members (18), (13) is greater than the predetermined operation amount.