Vehicle Head Lamp Module Solenoid Shield Mechanism
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Solution Overview
Problem
Existing head lamp modules for vehicles, which rely on expensive stepping motors and complex control systems, fail to adequately implement a fail-safe low beam mode when the high beam or adaptive driving beam mode fails, leading to potential dazzling of oncoming drivers and reduced safety due to insufficient or excessive downward rotation of the beam pattern.
Innovation Solution
A head lamp module utilizing solenoids instead of stepping motors, with a shield operation mechanism that includes return springs and plungers to adjust the beam pattern between low, high, and adaptive driving beam modes, allowing for cost reduction and improved fail-safe functionality by ensuring the beam pattern remains within the low beam limits during failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a stepping motor is used to operate the shield for implementing beam patterns, then the rotation angle of the shield can be accurately adjusted, but the manufacturing cost increases and the device complexity increases
Solution Approach 1:
The patent replaces the expensive stepping motor with a solenoid, which is a cheaper actuator. The solenoid operates by electromagnetic attraction to move the shield between predetermined positions (low beam, high beam, ADB modes) without requiring precise rotational control, thereby reducing manufacturing cost while maintaining functional accuracy.
Solution Approach 2:
The patent substitutes the mechanical stepping motor system with an electromagnetic solenoid system. The solenoid uses electromagnetic force to directly actuate the shield operation mechanism, eliminating the need for complex mechanical gear mechanisms and rotational positioning systems, thus reducing device complexity and cost.
2Ease of operation
If a stepping motor with complex control logic is used to operate the shield, then the beam pattern can be precisely controlled, but the device complexity increases
Solution Approach 1:
The patent replaces the complex stepping motor control system with a simpler solenoid control system. The solenoid requires only basic on/off control to activate the fail-safe function, eliminating the need for complex control logic, sensors, and communication protocols, thereby reducing device complexity.
Solution Approach 2:
The fail-safe mechanism is designed to automatically activate when the solenoid receives a control signal indicating a failure condition. The solenoid automatically adjusts the shield to the low beam position without requiring complex control algorithms or continuous monitoring, enabling self-service operation that reduces control system complexity.
3Reliability
If the case is rotated downward to perform fail-safe function in high beam mode, then the beam pattern extends along the road surface, but the visual range of the driver is narrowed
Solution Approach 1:
The patent pre-configures the shield with specific protrusion shapes and positions that automatically create the appropriate beam pattern when the shield is in the low beam position. When the fail-safe function activates, the shield is returned to this predetermined low beam position, which inherently provides both road surface illumination and adequate driver visual range without requiring excessive downward rotation of the case.
Solution Approach 2:
The patent uses locally differentiated protrusions on the shield (different shapes and positions for low beam, high beam, and ADB modes) to control the beam pattern distribution. The fail-safe function utilizes the low beam protrusions that are specifically designed to illuminate the road surface while maintaining driver visibility, achieving localized light distribution that balances safety and visibility.
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 solenoid-based head lamp module reduces manufacturing costs, enhances safety by ensuring the beam pattern transitions effectively to a low beam mode during failures, preventing driver dazzling and maintaining adequate visual range, thus improving driving safety.
Implementation Method 1
a first solenoid and a second solenoid which are respectively fixed at portions corresponding to both end portions of the shield in the shield housing
Implementation Method 2
a first return spring and a second return spring with both ends fixed to the first and second shield operation mechanism and the shield housing and configured to accumulate an elastic force when the shield is rotated in a first direction
Data Source
AI summary
A head lamp module for a vehicle is provided. The head lamp module includes a shield that is configured to be rotated by operations of first and second solenoids and first and second shield operation mechanisms and a beam pattern of a low beam mode, a beam pattern of a high beam mode, or a beam pattern of an ADB mode that is implemented based on a rotation angle of the shield. The beam pattern of the low beam mode is implemented when a fail safe function is performed based on a failure occurrence in the high beam mode or ADB mode state.