Headlamp Light Module Holder Thermal Compensation Link
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Solution Overview
Problem
Existing headlamp holder arrangements fail to accurately compensate for thermally induced position changes of the light module in the housing, leading to deviations in the cut-off line alignment due to temperature fluctuations, which cannot be corrected by existing adjustment devices.
Innovation Solution
A holder arrangement with a connecting link as part of the adjustment device that compensates for thermal changes by acting like a manual readjustment of the headlamp leveling actuator, using a thermo-compensation section that expands or contracts to maintain accurate light module positioning, allowing for effective thermo-compensation without altering existing headlamp leveling designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rigid holder arrangement is used to maintain light module position, then manufacturing precision is improved, but thermal expansion causes positional deviation
Solution Approach 1:
The patent applies thermal expansion by incorporating a compensating element made of material with different thermal expansion characteristics than the holder arrangement. This element is designed to expand or contract in response to temperature changes, thereby compensating for the thermal expansion of the rigid holder and maintaining the light module's positional accuracy throughout the operating temperature range.
2Manufacturing precision
If manual adjustment device is provided for position correction, then positional accuracy can be restored, but transient thermal changes cannot be compensated
Solution Approach 1:
The patent implements self-service by designing an automatic compensation system that actively responds to thermal changes without requiring manual intervention. The compensating element automatically adjusts the light module position in real-time based on temperature variations, making the system self-regulating and eliminating the need for manual adjustment devices to handle transient thermal changes.
3Manufacturing precision
If headlamp leveling actuator is used for position adjustment, then cut-off line alignment is improved, but thermal changes cause inadmissible position deviations
Solution Approach 1:
The patent uses an intermediary compensating element that is inserted between the holder arrangement and the light module. This intermediary component absorbs and compensates for thermal expansion effects, acting as a buffer that protects the precise positioning system from thermal disturbances and maintains reliable position stability under varying thermal conditions.
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 connecting link effectively compensates for thermal changes, maintaining the accuracy of the light module's position and preventing inadmissible deviations in the cut-off line alignment, similar to manual adjustments, without affecting the operation of the headlamp leveling device.
Implementation Method 1
A holder arrangement with a connecting link as part of the adjustment device that compensates for thermal changes by acting like a manual readjustment of the headlamp leveling actuator, using a thermo-compensation section that expands or contracts to maintain accurate light module positioning
Data Source
AI summary
A holder arrangement of a light module in the housing of a headlamp includes a headlamp leveling actuator being arranged between the light module and the housing for the adjustment of the position of the light module in the housing, wherein the position of the headlamp leveling actuator can be changed in the housing by means of an adjustment device. The adjustment device may include a connecting link which is embodied for the compensation of thermally induced changes of the position of the light module in the housing of the headlamp.