Cargo Cycle ABS Actuator Layout for Load-Adaptive Front Braking

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Solution Overview

Problem

Cargo bicycles face significant safety issues due to varying vertical load on the front wheel, affecting adherence and braking performance, especially under low load conditions, and existing ABS systems are not effectively adapted for these cycles.

Innovation Solution

The ABS actuator device is positioned below the luggage compartment container, configured to adapt to both full and empty load conditions, with sensors detecting unsafe braking conditions to adjust hydraulic pressure, and is protected from impacts during maximum lateral inclination.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of repair

If the ABS actuator device is mounted on the front fork for easy access, then ease of maintenance is improved, but the device becomes subject to displacements during steering and potential damage

Engineering Contradiction:

Improveaccessibility of ABS actuatorVSAvoidstability of ABS actuator position

Core Design Contradiction:

Ease of repairVSReliability

Solution Approach 1:

The ABS actuator device is relocated from the traditional horizontal mounting on the front fork to a vertical mounting position below the cargo container. This dimensional change in mounting location provides both protection from steering displacements and impacts while maintaining accessibility for maintenance through the bottom of the container structure

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Reliability

If the ABS actuator device is positioned below the cargo container for protection, then protection from impacts is improved, but accessibility for maintenance deteriorates

Engineering Contradiction:

Improveprotection of ABS actuatorVSAvoidaccessibility of ABS actuator

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The bottom structure of the cargo container serves multiple functions: it provides structural support for the container, acts as a protective enclosure for the ABS actuator device, and simultaneously serves as an access point for maintenance operations. This multi-functional design eliminates the need for separate access mechanisms while ensuring both protection and serviceability

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Ensures maximum riding safety during braking by adapting to load variations without structural modifications, maintaining accessibility and ease of maintenance.

Implementation Method 1

an ABS hydraulic actuator device (A) arranged in the connection between the master cylinder and the front brake caliper (221)

Methodology Applied

Scientific EffectHydraulic pressure control: Hydraulic Press

Data Source

PatentUS12600329B2ABS actuator device unit for a cargo cycle and a cargo cycle provided with such device

Publication Date: 2026.04.14 BLUBRAKE SRL

AI summary

A pedal-assisted cargo bicycle, includes a front extension of the frame which rotatably supports a front fork shaft around an axis-spaced forward with respect to the rotation axis of the bicycle handlebar, and a luggage compartment container mounted on said front extension of the frame. The cycle has an ABS hydraulic actuator device interposed in the connection between a master hydraulic cylinder associated with the lever for actuating the front brake, and an actuator hydraulic cylinder of a brake caliper associated with the front wheel unit. The ABS actuator device and the electronic control unit associated therewith are mounted on a support plate which is in turn mounted on a side wall of a lower portion of the luggage compartment container, so as to be protected from impacts against the ground even in a condition of maximum lateral inclination of the bicycle.