Hydraulic Bicycle Brake Linkage to Prevent Front Wheel Lockup
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Solution Overview
Problem
Existing brake systems for two-wheeled vehicles risk causing the front wheel to lock up during braking, leading to loss of control and potential accidents, as the rider must carefully balance braking forces to avoid skidding and tipping over.
Innovation Solution
A hydraulic brake system that couples the rear and front brakes, where the rear brake actuation compresses a hydraulic piston, pressurizing fluid to engage the front brake, which automatically adjusts to prevent the front wheel from locking up by reducing pressure when the rear wheel loses traction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the rider presses the brake lever hard to increase braking force, then the braking effectiveness is improved, but the front wheel may lock up causing loss of control and potential tipping over
Solution Approach 1:
The system uses the rear wheel's rotational movement as feedback to automatically control front brake activation. When the rear wheel rotates (indicating traction), the front brake is activated; when the rear wheel stops rotating (indicating loss of traction), the front brake is automatically deactivated, preventing wheel lockup and maintaining vehicle control stability
Solution Approach 2:
The system monitors the rear wheel's own rotational state and uses this information to self-regulate the front brake application. The rear wheel's movement directly controls the hydraulic actuator that applies or releases the front brake, creating a self-regulating mechanism that prevents excessive braking force without external intervention
2Speed
If the front brake is applied strongly to stop the vehicle quickly, then the stopping distance is reduced, but the vehicle may tip over forward due to locked front wheel
Solution Approach 1:
The system prevents the harmful effect of tip-over by automatically deactivating the front brake before the wheel can lock up and cause the vehicle to tip. The condition for front brake activation (rear wheel rotation) is removed in advance when traction is lost, counteracting the potential tipping force before it occurs
Solution Approach 2:
The system continuously monitors rear wheel rotation as feedback to determine when to reduce or eliminate front brake force. When the rear wheel stops rotating (indicating impending tip-over condition), the feedback mechanism automatically reduces front brake pressure, preventing the vehicle from tipping forward
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
This system ensures the front wheel does not lock, maintaining control during braking by automatically adjusting the braking force based on rear wheel traction, preventing skidding and tipping over.
Implementation Method 1
the movement of the structure compresses the hydraulic piston into the cylinder which results in compressed hydraulic fluid in a second hydraulic line which actuates the front brake
Data Source
AI summary
The present invention is directed towards a disk braking system for a bicycle having a rear disk coupled to a rear wheel. A rear brake caliper is coupled to a rear brake lever and the rear brake caliper is also coupled to a hydraulic actuator which has a piston that slides within a cylinder filled with hydraulic fluid and hydraulic tubing coupled to the cylinder and a front brake. When the rear wheel and rear disk are rotating, the rear brake caliper can be actuated which causes compresses rear brake caliper against the rear disk to slow the rotation of the rear wheel. The movement of the rear brake caliper can actuate the hydraulic actuator which causes hydraulic fluid to flow through the hydraulic tubing to actuate a front brake.