Engine Fan Belt Drive Layout for Flexible Cooling Module Positioning
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Solution Overview
Problem
Conventional internal combustion engines face challenges in adaptively positioning the fan relative to the cooling module, particularly in all-terrain and sports car applications, due to rigid coupling with the water pump, which limits flexibility and increases power output on the basic drive.
Innovation Solution
The internal combustion engine employs a secondary wraparound drive system with multiple wheels and belts to independently drive the fan, allowing for flexible positioning and reducing the power load on the water pump, enabling modular design and reduced installation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the fan is rigidly coupled to the water pump shaft, then the structure is simplified, but the fan positioning flexibility is reduced and power load on the water pump increases
Solution Approach 1:
The drive system is segmented into two independent parts: the basic drive (water pump driven by first wraparound means) and the auxiliary drive (fan driven by second wraparound means). This segmentation allows the fan to be positioned independently from the water pump, resolving the contradiction between structural simplicity and positioning flexibility.
Solution Approach 2:
The second wraparound means acts as an intermediary drive system that transfers power from the output shaft to the fan through intermediate wraparound wheels. This intermediary mechanism enables flexible fan positioning without requiring rigid coupling to the water pump shaft.
2Device complexity
If the fan is driven by the same wraparound means as the water pump, then the drive system is simplified, but the positioning adaptability for different vehicle variants is reduced
Solution Approach 1:
The wraparound drive system is divided into a basic drive portion (first wraparound means for water pump) and an auxiliary drive portion (second wraparound means for fan). This segmentation enables the auxiliary drive to be adapted or removed for different vehicle variants without affecting the basic drive, thus improving positioning adaptability while maintaining reasonable drive system complexity.
Solution Approach 2:
The auxiliary drive system is designed to be dynamically configurable - it can be installed or removed depending on vehicle variant requirements. The second wraparound means and associated wraparound wheels can be positioned flexibly to accommodate different cooling module positions in various vehicle applications.
3Ease of manufacture
If a rigid transmission is used between water pump and fan, then the coupling is simple, but the fan cannot be adapted to specific vehicle variants
Solution Approach 1:
The second wraparound means serves as an intermediary transmission mechanism between the output shaft and the fan, replacing the rigid water pump-fan coupling. This intermediary belt drive allows the fan to be positioned independently and adapted to specific vehicle variants while maintaining a relatively simple coupling approach.
Solution Approach 2:
The auxiliary drive system allows for parameter changes in fan positioning and orientation through the flexible wraparound means and intermediate wheels. Different wraparound wheel positions, belt routing configurations, and mounting locations can be selected to adapt the fan to specific vehicle variant requirements.
Data Source
AI summary
An internal combustion engine includes an output shaft, fan, auxiliary unit, and wraparound drive. The drive has a first wraparound wheel which is drivable by the output shaft and a first wraparound belt which wraps around the first wraparound wheel, which is drivable by the output shaft via the first wraparound wheel, and via which the auxiliary unit is drivable by the output shaft. The drive has a second wraparound wheel, a third wraparound wheel, a second wraparound belt which wraps around the first wraparound wheel and the second wraparound wheel where the second wraparound wheel is drivable by the output shaft via the second wraparound belt and the first wraparound wheel, and a third wraparound belt which wraps around the second wraparound wheel and the third wraparound wheel such that the fan is drivable by the second wraparound wheel via the third wraparound wheel and the third wraparound belt.