Hydraulic Brake Bleeding Control for Wire-Controlled Vehicles
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Solution Overview
Problem
Manual operation of the brake pedal is not applicable to wire-controlled brake systems, particularly in autonomous vehicles, necessitating an alternative method for gas exhaust in hydraulic brake systems.
Innovation Solution
A hydraulic brake system with a pressurizing assembly, brake fluid transmission assembly, and a controller that uses a motor and piston to automatically control brake fluid flow and connection to exhaust gas, allowing precise control without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If manual operation of brake pedal is used for gas exhaust, then gas can be exhausted from hydraulic brake system, but manual operation is not applicable to wire-controlled brake systems
Solution Approach 1:
The patent replaces the manual mechanical operation of the brake pedal with an automated motor-driven piston system. The motor (11) drives the piston (12) to move within the pressurizing cylinder (13), automatically pressurizing and circulating brake fluid to exhaust gas from the hydraulic brake system, eliminating the need for manual intervention while maintaining effective gas removal.
2Extent of automation
If motor-driven pressurizing assembly is used for automatic exhaust, then automation is achieved, but system complexity increases
Solution Approach 1:
The pressurizing assembly with motor-driven piston serves multiple functions: it pressurizes brake fluid for gas exhaust, circulates fluid through the hydraulic system, and can operate in different modes (pressurizing mode and suction mode) by reversing piston direction. This multi-functionality reduces the need for separate dedicated components for each operation.
Solution Approach 2:
The patent combines the pressurizing function and suction function into a single motor-driven piston system. The same piston (12) moving in opposite directions within the pressurizing cylinder (13) can both pressurize brake fluid for exhaust operations and suction fluid for system filling or refilling, merging multiple operations into one integrated mechanism.
3Reliability
If brake fluid is pressurized to exhaust gas, then gas is removed from system, but brake fluid may be wasted
Solution Approach 1:
The controller (40) monitors the gas exhaust process and controls the motor-driven piston operations accordingly. By detecting when gas has been successfully exhausted from the hydraulic brake system, the controller can terminate the pressurizing operation, preventing unnecessary continued pressurization that would waste brake fluid. The system provides feedback-based control to optimize the exhaust process.
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
Enables efficient and precise gas exhaust in wire-controlled brake systems, ensuring stable operation and preventing fluid waste, with the ability to detect and respond to pressure fluctuations for enhanced safety.
Implementation Method 1
The motor is separately connected to a first end of the piston and the controller, a second end of the piston is located in the pressurizing cylinder
Implementation Method 2
The hydraulic brake system can transfer, through brake fluid, pressure of a driver stepping on a brake pedal
Implementation Method 3
Because liquid is incompressible and gas can be compressed, to achieve effective pressure transfer, it is necessary to ensure that the hydraulic brake system is a system full of brake fluid and free of gas
Data Source
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AI summary
This application provides a hydraulic brake system, an exhaust control method thereof, a controller, and a vehicle, and relates to the field of electronic technologies in the field of automobiles. In the hydraulic brake system provided in this application, a pressurizing assembly can output brake fluid to a brake fluid transmission assembly under control of a controller. The brake fluid transmission assembly can connect the pressurizing assembly to a brake control assembly or a brake assembly under control of the controller, so as to exhaust gas in the assembly connected to the pressurizing assembly. Because the controller can control the pressurizing assembly and the brake fluid transmission assembly to automatically perform an exhaust operation, and the exhaust process does not require manually stepping on a brake pedal, the controller is applicable to a wire-controlled brake system of a future vehicle (for example, an intelligent driving vehicle). Moreover, because the pressurizing assembly is realized by using a motor, a piston and a pressurizing cylinder, fine control of an outlet amount of the brake fluid can be realized.