Vehicle Window Speed Control via Activation State Detection
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Solution Overview
Problem
Existing window control systems in vehicles lack efficient speed control mechanisms, particularly when transitioning from manual to automatic or remote operation, which can lead to inconsistent window movement and potential obstacles during closure.
Innovation Solution
A system comprising a window actuator with a motor and power source, controlled by a controller that detects activation states from switches and sensors to adjust speed, allowing for variable speed control between manual and remote operations, and reverses direction upon encountering obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the window is moved at a constant high speed during closure, then the productivity of window operation is improved, but the reliability is worsened due to potential obstacles in the path of window travel
Solution Approach 1:
The window control system dynamically adjusts the motor speed based on real-time conditions. The controller monitors window position and activation state, switching between high speed (first rate) for efficiency during most of the travel, and low speed (second rate) when approaching the closed position or when obstacles are detected. This dynamic speed adjustment maintains productivity while ensuring safety and reliability.
Solution Approach 2:
The system implements feedback control by continuously monitoring window position and activation state, then adjusting motor speed accordingly. The controller receives feedback about window travel progress and automatically reduces speed near the closed position to prevent obstacles. This feedback mechanism resolves the contradiction by enabling high-speed operation when safe and low-speed operation when necessary.
2Reliability
If the window control system uses variable speed operation with multiple rates, then the reliability is improved by preventing obstacles, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The control system is designed to perform multiple functions using a single integrated controller. The same controller that manages window position monitoring also handles speed adjustment, activation state detection, and obstacle prevention. This multi-functional approach improves reliability through comprehensive control while minimizing the increase in device complexity by avoiding separate dedicated components for each function.
Solution Approach 2:
The system changes operational parameters (motor speed rate) based on window position and activation state rather than using physically different control mechanisms. The controller adjusts the electrical parameters supplied to the motor, switching between first and second rates as needed. This parameter-based control achieves reliable obstacle prevention while keeping the device complexity relatively low.
3Ease of operation
If the window is raised using express up function with continuous motor operation, then the ease of operation is improved, but the energy consumption increases during the closure process
Solution Approach 1:
The window closure operation uses periodic action by switching between two distinct speed phases: a first high-speed phase for the majority of the travel distance, and a second low-speed phase when approaching the closed position. This periodic speed variation maintains ease of operation (the window still closes automatically without continuous user input) while reducing overall energy consumption compared to maintaining constant high speed throughout the entire closure 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
Ensures smooth and controlled window movement, reducing the risk of obstacles during closure by adjusting speed based on activation states, enhancing user safety and operational efficiency.
Implementation Method 1
The window actuator includes a power source and a motor operatively connected to the window and to the power source, wherein the motor is configured to move the window relative to the window opening in response to the first and second control signals from the controller
Data Source
AI summary
A system and method for controlling movement of a window in a vehicle door assembly h includes a window actuator operable to move a window relative to a window opening in the door between a first position and at least one second position. The controller is configured monitor the position of the window relative to the window frame and transmit at least one control signal to the window actuator to move the window relative to the window opening in response to activation of the one or more devices. The controller transmits a first control signal to the window actuator to move the window at a first speed in response to detection of a first activation state and a second control signal to the window actuator to move the window at a second speed that is reduced relative to the first speed in response to detection of a second activation state.