Vehicle Headlamp Leveling via Pulse Width Control
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Solution Overview
Problem
Existing headlamp leveling systems for vehicles require a mechanical switch for adjusting the light-illumination angle, leading to increased vehicle and headlamp leveling device costs.
Innovation Solution
A headlamp leveling device and method utilizing a pulse width control system, which includes a control voltage generator, a control IC, a shaft position detector, and a feedback voltage generator, to adjust the light-illumination angle of the headlamp without the need for a mechanical switch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a mechanical switch is installed in the vehicle to adjust the light-illumination angle, then the driver can manually control the headlamp leveling, but the vehicle cost and headlamp leveling device cost increase
Solution Approach 1:
The patent replaces the mechanical switch system with an electronic control system. The control IC receives pulse width signals from the vehicle system and converts them to control voltages, eliminating the need for a mechanical switch. This substitution reduces device complexity and cost while maintaining the headlamp adjustment functionality through electronic means.
Solution Approach 2:
The patent introduces a control IC as an intermediary component between the vehicle system and the headlamp leveling motor. The control IC translates pulse width signals into appropriate control voltages, serving as a mediator that enables communication between different system components without requiring direct mechanical interaction.
2Ease of operation
If a mechanical switch is installed in the vehicle to adjust the light-illumination angle, then the driver can manually control the headlamp leveling, but the vehicle cost increases
Solution Approach 1:
The patent replaces the mechanical switch system with an electronic control system. The control IC receives pulse width signals from the vehicle system and converts them to control voltages, eliminating the need for a mechanical switch. This substitution reduces device complexity and cost while maintaining the headlamp adjustment functionality through electronic means.
Solution Approach 2:
The patent utilizes the existing vehicle pulse width control system, which is already present for other vehicle functions, to also control the headlamp leveling. This multi-functional use of the existing control infrastructure eliminates the need for separate mechanical switches and reduces overall vehicle cost.
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 pulse width control system effectively adjusts the light-illumination angle of the headlamp, reducing costs by eliminating the need for a mechanical switch while maintaining driving convenience and visibility.
Implementation Method 1
a headlamp leveling device and a headlamp leveling method capable of adjusting a light-illumination angle of a headlamp using a pulse width control method used in a vehicle system
Implementation Method 2
the voltage smoothing device may include a first resistor connected to an output terminal of the voltage applying device at one end of the first resistor, and a first capacitor connected to another end of the first resistor at one end of the first capacitor
Implementation Method 3
the hysteresis device may include a resistor that receives a smoothed voltage from the voltage smoothing device at one end of the hysteresis device and outputs the control voltage at another end of the hysteresis device
Implementation Method 4
a shaft position detector that generates a voltage corresponding to a position of the shaft moving with rotation of the motor
Data Source
AI summary
A headlamp leveling device and a headlamp leveling method. The headlamp leveling device may include a control voltage generator that generates a control voltage based on a width of a pulse, a control integrated circuit (IC) that controls a rotation direction of a motor by comparing a voltage level of a feedback voltage with a voltage level of the control voltage, a shaft position detector that generates a voltage corresponding to a position of the shaft moving with rotation of the motor, and a feedback voltage generator that generates the feedback voltage based on a voltage generated to correspond to the position of the shaft.