Motorcycle Brake Control Device for Lateral Sliding Inhibition
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Solution Overview
Problem
Existing brake control systems for motorcycles fail to effectively inhibit lateral sliding during turning on varying road surfaces and wheel conditions, requiring skilled rider input and compromising brake force consistency.
Innovation Solution
A brake control device that includes longitudinal and lateral sliding detection systems, which adjust the antilock brake operation to maintain optimal brake force by correcting the target slip ratio based on detected sliding degrees, ensuring adequate brake force and preventing lateral sliding regardless of tilt state or road surface conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ABS is controlled by decreasing the sliding threshold value or target slip ratio as the tilt angle increases, then lateral sliding is inhibited, but brake force decreases significantly
Solution Approach 1:
The patent changes the control parameters (sliding threshold value and target slip ratio) dynamically based on the detected lateral sliding degree rather than statically based on tilt angle. This allows the system to maintain appropriate brake force while inhibiting lateral sliding by adjusting parameters according to actual sliding conditions.
Solution Approach 2:
The patent introduces a feedback mechanism where the lateral sliding detection device continuously monitors the lateral sliding degree and feeds this information back to the controller. The controller then adjusts the brake force accordingly, creating a closed-loop control system that maintains both lateral sliding inhibition and sufficient brake force.
2Reliability
If the brake pressure is gradually decreased before the tilt becomes larger, then lateral sliding is prevented, but brake operation becomes complex and requires skilled input
Solution Approach 1:
The patent enables the brake system to automatically adjust and correct brake force based on detected lateral sliding conditions without requiring rider intervention. The correction process operates autonomously, detecting lateral sliding and automatically modifying brake force to maintain stability, thereby simplifying rider operation while ensuring safety.
Data Source
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AI summary
A brake control device is provided in a straddled vehicle having a wheel. The brake control device includes a fluid pressure control unit, a lateral sliding acceleration detection device and an ECU for ABS. The fluid pressure control unit supplies brake force to the wheel of the straddled vehicle. The ECU for ABS includes a CPU. The CPU detects longitudinal sliding of the wheel, and performs an antilock brake operation. In the antilock brake operation, the fluid pressure control unit is controlled such that a longitudinal sliding degree of the wheel becomes close to target magnitude. The lateral sliding acceleration detection device detects lateral sliding of the wheel. The CPU corrects the antilock brake operation to inhibit the lateral sliding of the wheel based on a result of detection of the lateral sliding of the wheel.