Vehicle Braking Control Device Mode Selection
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Solution Overview
Problem
Hydraulic braking systems often generate undesirable noises and lack optimal control strategies for energy efficiency and comfort, limiting dynamic and accurate pressure settings in vehicle braking systems.
Innovation Solution
A control device that selects an optimized operating mode from multiple strategies to manage brake pressures in vehicle braking systems, utilizing existing hydraulic components like plungers, pumps, and valves to minimize noise and maximize energy efficiency, allowing for targeted use of components based on vehicle type, driving conditions, and component states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If hydraulic components (pump, plunger, valves) are used to build up or reduce brake pressure, then pressure control capability is improved, but undesirable noises are generated
Solution Approach 1:
The control device dynamically selects between different operating modes (first and second modes) depending on the braking situation. In the first operating mode, the pump is used for pressure buildup while the plunger remains inactive. In the second operating mode, the plunger is used for pressure reduction while the pump remains inactive. This dynamic switching avoids simultaneous operation of noisy components and optimizes noise reduction based on actual braking requirements.
Solution Approach 2:
The system changes the operational parameters of hydraulic components by selectively activating or deactivating the pump and plunger based on the braking situation. The control device adjusts which component is active (pump for pressure buildup, plunger for pressure reduction) to minimize noise generation while maintaining effective brake pressure control.
2Measurement precision
If multiple hydraulic components are used for pressure control, then pressure setting accuracy and dynamic performance are improved, but device complexity increases
Solution Approach 1:
The braking system is segmented into distinct functional components with specialized roles: the pump is dedicated to pressure buildup operations, while the plunger is dedicated to pressure reduction operations. This segmentation allows each component to be optimized for its specific function, improving overall pressure control accuracy while managing complexity through clear functional division rather than requiring all components to perform all functions.
Solution Approach 2:
Both the pump and plunger are integrated into a single braking system that can operate in multiple modes. The control device universally manages both components, selecting the appropriate one based on the braking situation. This multi-functional integration allows the system to achieve high pressure control accuracy through component selection while avoiding the complexity of having separate independent systems.
3Speed
If hydraulic components operate at high output for rapid pressure changes, then braking response time is improved, but noise generation increases
Solution Approach 1:
The control device dynamically adapts the operating mode based on the braking situation and required response speed. When rapid pressure changes are needed, the system selects the appropriate component (pump for buildup, plunger for reduction) that can deliver the required response speed with minimal noise. This dynamic adaptation ensures high braking response speed while minimizing noise generation through intelligent component selection.
Data Source
AI summary
A control device for a vehicle braking system including an electronic device to control at least one first hydraulic component and second hydraulic component of the braking system so that a first brake pressure in at least one first wheel brake cylinder of a first brake circuit of the braking system is settable corresponding to a predefined first setpoint brake pressure or a setpoint brake pressure profile, and a second brake pressure is settable in at least one second wheel brake cylinder of a second brake circuit of the braking system corresponding to a predefined second setpoint brake pressure or setpoint brake pressure profile, the electronic device being configured to select an operating mode to be performed from at least two workable operating modes based on at least one provided specified variable. Also described is a braking system for a vehicle and a method for operating a vehicle braking system.