Motorcycle Brake Control Modulating Pressure Rise Rate
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Solution Overview
Problem
Existing motorcycle braking devices with interlocking brake systems face challenges in providing smooth and natural brake operation, especially when the rear-wheel brake is actuated, leading to unintentional abrupt operations due to the difficulty in delicate control with a foot-operated pedal, and require costly and time-consuming adjustments for different vehicle types.
Innovation Solution
A braking device with a hydraulic pressure detector, determining portion, and controller that adjusts the rising rate of rear-wheel brake hydraulic pressure and controls front-wheel brake pressure to prevent excessive force, allowing for smoother operation and reducing manufacturing costs by optimizing control settings without altering vehicle-specific parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a brake pedal is operated by pushing with a foot in an interlocking brake system, then the rear-wheel brake and front-wheel brake are both actuated, but a large braking force is applied unintentionally due to difficulty in delicate control
Solution Approach 1:
The patent replaces the purely mechanical brake pedal operation with an electro-hydraulic control system. A sensor detects pedal operation and converts it to an electrical signal, which is then processed by a control unit that modulates hydraulic pressure through a motor-driven pump. This substitution allows for precise electronic control of braking force, enabling delicate control that was impossible with direct mechanical linkage alone.
Solution Approach 2:
The patent implements a feedback control mechanism where sensors continuously monitor brake pedal position, hydraulic pressure, and wheel speed. The control unit processes this feedback information and dynamically adjusts the hydraulic pressure applied to both rear and front brakes. This closed-loop feedback system prevents unintentional abrupt braking by continuously comparing actual braking force with desired braking force and making real-time corrections.
2Reliability
If optimization of specifications for brake pedal input mechanism or physical specifications for front-wheel brake is performed, then brake control is improved, but manufacturing man-hours and cost increase due to change of parts for every vehicle type
Solution Approach 1:
The patent achieves vehicle-specific brake optimization through software parameter configuration rather than hardware modification. The control unit contains adjustable parameters that define braking force distribution ratios, pressure rise rates, and threshold values for different vehicle types. Manufacturers can optimize brake performance for each vehicle model by simply programming different parameter sets into the same standardized control unit, eliminating the need to physically redesign brake components for each vehicle type.
Solution Approach 2:
The patent designs a universal brake control system that can serve multiple vehicle types with different weight, size, and performance requirements. The same standardized control unit, sensor assembly, and hydraulic components are used across different motorcycle models, with versatility achieved through reconfigurable control software. This multi-functional design allows a single brake control system to be adapted to various vehicle specifications without requiring vehicle-specific custom parts.
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 solution provides a more natural and smooth brake operation performance, reduces wheel locking, and minimizes manufacturing costs by allowing versatile control settings across various motorcycle models without changing vehicle-specific parts, enhancing brake control performance and reducing man-hours.
Implementation Method 1
a hydraulic pressure detector that detects a rear-wheel brake hydraulic pressure caused by the operation of the rear-wheel brake operating unit
Implementation Method 2
a hydraulic pressure controller that, when it is determined by the determining portion that the detected value is the predetermined value or more, changes a rising rate of the rear-wheel brake hydraulic pressure
Implementation Method 3
when a brake operating unit (such as a brake lever or a brake pedal) on either of the front and rear wheels is operated, hydraulic pressure is allowed to act on a brake of the wheel on the operated side
Data Source
AI summary
A braking device for the motorcycle is configured to permit actuation control in an interlocking manner of a rear-wheel brake caliper and a front-wheel brake caliper based on an operation of a brake pedal. The braking device includes a hydraulic pressure detector for detecting rear-wheel brake hydraulic pressure caused by the operation of the brake pedal; a determining portion that determines whether or not a detected value by the hydraulic pressure detector is a predetermined value or more; and a hydraulic pressure controller that, when it is determined by the determining portion that the detected value is the predetermined value or more, changes a rising rate of the rear-wheel brake hydraulic pressure to a value lower than a rising rate during a period until the time when the rear-wheel brake hydraulic pressure reaches the predetermined value to control the rear-wheel brake hydraulic pressure, and also controls front-wheel brake hydraulic pressure.