AVH Brake Force Monitoring With Hydraulic Compensation
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Solution Overview
Problem
Conventional vehicle brake systems face challenges in accurately determining brake force and efficiently compensating for it, leading to reduced braking efficiency and potential malfunctions in automatic vehicle hold (AVH) devices.
Innovation Solution
A vehicle control apparatus and method that includes an inputter to receive signals from an AVH device and sensing devices to determine abnormal brake force states, using a determiner to assess vehicle movement and brake force values, and a controller to supply target hydraulic pressure to wheels for compensation, while also managing the AVH device's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional brake control methods are used, then the brake system can operate, but the accuracy of determining brake force is insufficient
Solution Approach 1:
The patent implements a feedback mechanism where the controller continuously monitors vehicle movement during AVH operation and compares it against expected stationary conditions. When movement is detected, the system feeds back an abnormal brake force determination and activates compensation. This closed-loop feedback improves measurement precision by continuously verifying brake force effectiveness and correcting deviations.
Solution Approach 2:
The patent replaces conventional mechanical brake force measurement methods with an electronic detection system. The controller uses electronic sensors to detect vehicle movement and electronically determines brake force abnormality, substituting traditional mechanical measurement approaches with electronic control and detection mechanisms to achieve higher precision.
2Productivity
If conventional brake compensation methods are used, then brake force can be adjusted, but the efficiency of compensation is insufficient
Solution Approach 1:
The patent applies preliminary action by pre-establishing target hydraulic pressure values for brake compensation. When abnormal brake force is detected, the controller immediately supplies the predetermined target pressure to the brake device without delay, enabling rapid compensation and reducing time loss during brake force correction.
Solution Approach 2:
The patent uses hydraulic principles to compensate for brake force by supplying target hydraulic pressure to the brake device. The controller regulates hydraulic pressure in the brake system to achieve precise and efficient brake force adjustment, leveraging the rapid response characteristics of hydraulic systems for effective compensation.
3Reliability
If AVH device operates without monitoring, then the system remains simple, but malfunction can occur during brake force compensation
Solution Approach 1:
The patent implements monitoring feedback by detecting vehicle movement during AVH operation and feeding this information back to the controller. The system monitors brake force effectiveness continuously and activates compensation mechanisms when abnormalities are detected, improving AVH device reliability through systematic monitoring and feedback control.
4Productivity
If brake force is not accurately determined, then the control system remains simple, but braking efficiency is reduced
Solution Approach 1:
The patent replaces simple mechanical brake control with an electronic control system that uses sensors to detect vehicle movement and electronically determines brake force effectiveness. This substitution of mechanical systems with electronic control mechanisms enables accurate brake force determination and improves braking efficiency despite increased system complexity.
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 solution enhances brake force accuracy, improves compensation efficiency, prevents AVH device malfunctions, increases vehicle reliability, and reduces overall braking time by effectively managing brake force and AVH operations.
Implementation Method 1
a sensing device configured to sense a current vehicle movement value
Implementation Method 2
a brake device configured to generate a current vehicle brake force value
Implementation Method 3
a compensator configured to supply a target hydraulic pressure value established in response to the current vehicle movement value to one or more wheels
Data Source
AI summary
A vehicle control apparatus and a method for controlling the same are disclosed. The vehicle control apparatus includes an inputter, a determiner, and a controller. The inputter receives an automatic vehicle hold (AVH) switch operation signal from an AVH device, and receives a current vehicle movement value sensed by a sensing device and a current vehicle brake force value of a brake device that generates brake force in response to activation of the AVH device. The determiner determines whether the received AVH switch operation signal transitions from an ON state to an AVH entry state, determines whether vehicle movement occurs on the basis of the received current vehicle movement value during an AVH retention time in the AVH entry state, and determines that the current vehicle brake force value is in an abnormal state when vehicle movement occurs. The controller receives the current vehicle movement value and the current vehicle brake force value, and transmits a command for judgment to the determiner.