Coupled Parking Brake Control for Slope Hold and Overheat Prevention
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Solution Overview
Problem
Existing vehicle parking systems, such as hydraulic and electronic parking brake systems, face challenges in providing simultaneous quick response and pressure build-up control, especially in scenarios with slopes, leading to issues like slippage and overheating.
Innovation Solution
A vehicle control method that couples the hydraulic and electronic parking systems by sending specific output signals based on control instructions, allowing the hydraulic system to initiate pressure build-up and the electronic system to be pulled up or released accordingly, thereby implementing a functional backup and preventing overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a hydraulic parking system is used to implement vehicle braking, then the response speed is fast and pressure build-up control with slope capability is achieved, but maintaining high hydraulic pressure for a long time causes overheating of brake motor and functional safety backup requirement is not met
Solution Approach 1:
The patent combines the hydraulic parking system and electronic parking system into a coupled control system. The hydraulic system provides fast response and pressure build-up control, while the electronic system provides functional backup and can take over when hydraulic pressure needs to be released, preventing brake motor overheating from prolonged high pressure maintenance.
2Reliability
If an electronic parking system is used to implement parking braking, then functional safety backup is provided, but the response time is relatively long and pressure build-up control with slope capability is not achieved
Solution Approach 1:
The patent merges the electronic parking system with the hydraulic parking system in a coupled control architecture. The electronic system ensures functional safety backup and reliability, while the hydraulic system compensates for the slow response time and lack of pressure build-up control with slope capability, achieving both reliability and performance.
3Device complexity
If only an electronic parking system is used, then the system structure is simpler, but slippage occurs and response time is long
Solution Approach 1:
The patent couples the hydraulic parking system with the electronic parking system to prevent slippage. The hydraulic system provides immediate pressure build-up control and slope capability that the electronic system alone cannot achieve, thereby preventing slippage while maintaining a relatively simple overall system structure through integrated control.
Data Source
AI summary
The disclosure relates to a vehicle control method. The vehicle control method includes: receiving a first control instruction; sending a first output signal based on the first control instruction, where the first output signal is used to instruct a hydraulic parking system to start pressure build-up; and sending a second output signal upon the hydraulic parking system reaching a predetermined first state, where the second output signal is used to instruct an electronic parking system to start to be pulled up or released. The disclosure further relates to a vehicle control device, a computer-readable storage medium, and a vehicle. According to the vehicle control solution provided in the disclosure, a hydraulic parking system and an electronic parking system are controlled in a coupled manner in vehicle starting and stopping conditions, thereby providing a user with highly comfortable, reliable, and safe vehicle starting and stopping experience.