Electric Brake Caliper Circuit Sharing for Twin-Bore EPB
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Solution Overview
Problem
The direct application of electric parking brake (EPB) systems from passenger vehicles to large vehicles results in increased costs due to the need for four drive circuits and potential inefficiencies with higher battery voltages, requiring redesigns of motor components.
Innovation Solution
An electric brake device configuration where two electric mechanisms are driven by a single drive circuit output, allowing for shared components and efficient voltage utilization across varying battery voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two EPBs for a passenger vehicle are directly applied to the large vehicle, then component sharing and cost reduction are expected, but four drive circuits are required which increases the cost
Solution Approach 1:
The patent combines multiple electric mechanisms (brake actuators) into a single caliper assembly, where one drive circuit controls multiple electric mechanisms through a differential gear mechanism. This merging approach reduces the total number of drive circuits required while maintaining the braking functionality of each wheel.
Solution Approach 2:
The single drive circuit is designed to perform multiple functions by controlling different electric mechanisms within the same caliper. The differential gear mechanism enables one drive circuit to independently actuate multiple brake pistons, providing universal control capability that reduces system complexity.
2Adaptability or versatility
If EPBs for a passenger vehicle are applied to a large vehicle with higher battery voltage, then the system can be reused, but the input voltage cannot be effectively used and motor redesign is required
Solution Approach 1:
The patent modifies the electrical parameters of the motor by changing the series/parallel connection configuration of the armature windings. This allows the same motor to operate efficiently at different voltages (e.g., 12V or 24V) without physical redesign, simply by reconfiguring the electrical connections to match the available battery voltage.
Data Source
AI summary
Provided is an electric brake device including one caliper including at least two electric mechanisms each configured to apply a braking force to a vehicle and to maintain the braking force. The at least two electric mechanisms are to be driven by one drive circuit output, that is, one output from one drive circuit. In this manner, for example, even when it is required to control a large number of electric mechanisms as in a case in which the electric brake device is applied to a twin-bore caliper, the number of drive circuits for driving the electric mechanisms can be reduced, thereby being capable of reducing cost.