Vehicle Brake Input Device Layout via Segmentation
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Solution Overview
Problem
The existing electric vehicle brake booster systems tend to increase in size due to the integration of brake pedal thrust and electric motor booster thrust mechanisms, limiting the layout possibilities of the vehicle brake system, particularly in compact spaces like the engine room.
Innovation Solution
A separate input device for the vehicle brake system is designed, comprising a master cylinder and a stroke simulator integrated as a compact unit, with a component storage box and a vent hole configuration that allows for downsizing and improved layout flexibility, including remote placement from the driver seat to reduce noise and oscillation impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the brake pedal thrust mechanism and electric motor booster thrust mechanism are integrated as a single unit, then the structural completeness is improved, but the device size increases and layout flexibility deteriorates
Solution Approach 1:
The brake system is divided into two independent units: the input device (master cylinder assembly) and the electric brake actuator. This segmentation allows each unit to be optimized separately and installed in different locations, reducing overall system complexity while maintaining functional completeness.
Solution Approach 2:
The electric brake actuator is extracted from the traditional integrated booster structure and positioned separately. This extraction enables the input device to be downsized and simplifies the overall system architecture by separating the hydraulic generation function from the electric actuation function.
2Adaptability or versatility
If the input device is disposed as a separate unit from the electric brake actuator, then the layout flexibility is improved, but the device complexity increases
Solution Approach 1:
The input device is designed as a universal assembly that can be independently integrated with different electric brake actuator models. The standardized interface and separate configuration allow the same input device to work with various actuator types, enhancing system adaptability without increasing complexity.
3Volume of moving object
If components are stored in a component storage box attached to the master cylinder, then the space utilization is improved, but the reliability may deteriorate due to potential foreign matter intrusion
Solution Approach 1:
The component storage box is nested within the space between the master cylinder body and the dashboard, utilizing otherwise wasted space. This nesting approach stores components close to their usage point without increasing the overall system footprint or compromising protection.
Solution Approach 2:
A vent hole is introduced as an intermediary structure that allows air circulation between the component storage box and the external environment. This mediator prevents pressure buildup and temperature extremes while the dashboard physically blocks direct foreign matter intrusion, balancing ventilation needs with protection requirements.
Data Source
AI summary
The present invention provides an input device of a vehicle brake system, the input device being a separate unit from an electric brake actuator, the electric brake actuator for generating a first fluid pressure, the input device of the vehicle brake system comprising: a master cylinder for generating a second fluid pressure; a stroke simulator for applying a simulated reaction force, the stroke simulator and the master cylinder forming an attachment body, with the stroke simulator disposed in communication with the master cylinder; and a component storage box provided on the attachment body for a component of either one of the master cylinder and the stroke simulator, wherein the attachment body has a vent hole with a first end in communication with the component storage box and a second end in communication with a space formed before a surface of a dashboard having the input device mounted thereon.