Vehicle Brake Modulator Centralized Control via Data Bus
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Solution Overview
Problem
Current vehicle brake systems are complex and costly due to the need for intelligent wheel modules and central modules, leading to high manufacturing costs, complex maintenance, and limited reuse of components.
Innovation Solution
A modulator with a simplified design that centralizes computing operations in a central module, using an ASIC with integrated processor and output stages, connected via a high-speed data bus, allowing for decentralized signal collection and actuation of solenoid valves, reducing the need for multiple intelligent components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If wheel modules are designed with high intelligence (microprocessor circuits) to process signals directly, then signal processing capability is improved, but manufacturing cost and device complexity increase significantly
Solution Approach 1:
The patent extracts the intelligence and signal processing functions from the distributed wheel modules and concentrates them in a central control unit. The wheel modules are reduced to simple sensor interfaces that only collect wheel speed data, while all complex calculations and control decisions are performed centrally by the control unit connected via data bus.
Solution Approach 2:
The patent merges multiple intelligent functions into a single central control unit. Instead of having separate microprocessors in each wheel module, all processing capabilities are combined in one centralized location, reducing overall system complexity while maintaining full signal processing capability.
2Extent of automation
If multiple intelligent components are used in the brake system, then processing capability is improved, but maintenance complexity and spare parts requirements increase
Solution Approach 1:
The patent extracts intelligence from multiple distributed components and consolidates it in a single central unit. This eliminates the need for multiple complex assemblies, reducing spare parts inventory requirements and simplifying maintenance procedures since only one type of intelligent component (the central control unit) needs to be maintained.
3Adaptability or versatility
If complex assemblies are fabricated in low numbers, then customization capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent segments the brake system into simple, identical wheel module units and a single central control unit. The wheel modules are standardized components with uniform interfaces, allowing them to be manufactured in large quantities at low cost using assembly line production, while the central unit handles all customization and control logic.
Solution Approach 2:
The patent creates universal wheel modules that can be used on any vehicle platform with the same interface standards. These standardized modules serve multiple functions (sensing, basic signal conditioning) and can be mass-produced, while the central control unit provides the necessary adaptability for different applications.
Data Source
AI summary
A modulator for a vehicle brake system connected to a central module via a data bus, includes at least one input for capturing measured values and at least one output for controlling at least one electromagnetic valve. A control circuit for actuating the valve is connected by the bus such that the measured values are transmitted to the central module. Control commands for actuating the valve are calculated from the measured values in the central module, and are transmitted via the data bus to the modulator so that the it selects the valve as a function of the commands. A vehicle system has at least two modulators and a central module integrated in a modulator. The modulator can be used as a pressure modulator in an air suspension system or in an electronic braking system or in a conventional braking system with an anti-lock braking system or an electronic stability program.