Brake Control Apparatus Backup Pressure Regulator Malfunction
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Solution Overview
Problem
Existing brake control systems fail to maintain effective braking force when the booster system malfunctions, leading to instability and safety concerns.
Innovation Solution
A brake control apparatus with a master cylinder, a booster system, a pressure regulator, and a control section that includes controllers to detect malfunctions and switch to backup modes, allowing the pressure regulator to independently control wheel cylinder pressure, ensuring suitable braking force even when the booster system is malfunctioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the booster system is used to raise wheel cylinder pressure, then braking force is improved, but reliability deteriorates when the booster malfunctions
Solution Approach 1:
The patent implements a backup pressure regulator system that is prepared in advance to take over wheel cylinder pressure control when the booster system malfunctions. This redundant system ensures continuous braking capability, preventing total system failure and maintaining reliability even when the primary booster system fails.
Solution Approach 2:
The control section dynamically changes the operational parameters of the braking system by switching between booster-based pressure generation and pressure regulator-based pressure control based on system status. When the booster is functioning normally, it provides primary braking force; when malfunctioning, the system transitions to using the pressure regulator to maintain braking force through alternative means.
2Reliability
If the booster system malfunctions, then reliability deteriorates, but the system should maintain braking capability
Solution Approach 1:
The control section automatically detects booster system malfunctions and switches to the backup pressure regulator system without requiring driver intervention. The system serves itself by monitoring its own status and autonomously transitioning to an alternative operating mode, maintaining braking control ease of operation even during failure conditions.
Solution Approach 2:
The control section continuously monitors the booster system status and uses this feedback to determine when to switch between the booster system and the pressure regulator system. This closed-loop control ensures that the system maintains reliability by automatically adapting to failure conditions while preserving ease of operation through automated mode switching.
3Reliability
If backup modes are implemented for malfunction detection, then reliability is improved, but device complexity increases
Solution Approach 1:
The pressure regulator system serves multiple functions: it acts as a backup when the booster fails, provides supplemental pressure control, and enables alternative braking modes. This multi-functionality justifies the added complexity by providing enhanced reliability and versatile operating capabilities from a single integrated system.
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
The system effectively maintains a suitable braking force and ensures safety, ease of operation, and comfort by allowing the pressure regulator to control wheel cylinder pressure independently in case of booster system failures.
Implementation Method 1
a master cylinder arranged to raise an internal pressure of a wheel cylinder (wheel cylinder pressure) of a vehicle in accordance with operation of an input device of the vehicle
Implementation Method 2
a booster system for raising the wheel cylinder pressure by operating the master cylinder independently of operation of the input device
Implementation Method 3
a pressure regulator system with a hydraulic pressure source for raising the wheel cylinder pressure independently of operation of the master cylinder
Data Source
AI summary
A brake control apparatus for a vehicle includes: a master cylinder for raising a wheel cylinder pressure according to operation of a brake pedal; a booster for raising the wheel cylinder pressure by operating the master cylinder independently of operation of the brake pedal; a pressure regulator provided with a hydraulic pump for raising the wheel cylinder pressure independently of operation of the master cylinder; and a control section including: a first controller for controlling the booster; and a second controller for controlling the pressure regulator. The control section detects that at least one of the booster and the first controller is in a state of malfunction; selects one of backup modes according to the state of malfunction, wherein the backup modes restrict operation of at least one of the booster and the pressure regulator in different manners; and controls the wheel cylinder pressure in the selected backup mode.