Vehicle Bonnet Cooling Device with Lateral Air Passages
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Solution Overview
Problem
Existing engine compartment cooling systems for vehicles, particularly sports vehicles, face challenges in effectively evacuating heat while preventing water ingress during rain, as ventilation openings can lead to water entry.
Innovation Solution
A cooling device with strategically designed air passages and water collectors integrated into the bonnet, featuring external and internal openings with baffles and gutters to manage hot air flow and rainwater, ensuring efficient heat evacuation and water exclusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If ventilation openings are created at the top of the hood for heat dissipation, then heat evacuation from the engine compartment is improved, but water leakage risk increases during rain
Solution Approach 1:
The patent transforms the traditional top-down ventilation approach by creating openings in the side walls of the engine compartment. This dimensional shift allows hot air to escape laterally while the hood remains closed, eliminating the direct path for rainwater entry that exists with top openings. The side openings are positioned to exploit natural convection currents for heat removal without compromising water protection.
Solution Approach 2:
The ventilation system is segmented into multiple side openings distributed along the hood's side walls rather than a single top opening. This segmentation allows for distributed heat evacuation while maintaining the integrity of the hood structure and preventing water ingress. Each opening acts as an independent ventilation point that contributes to overall heat removal without creating a direct water entry path.
2Weight of moving object
If the hood is made from composite materials like carbon fiber for weight reduction, then vehicle performance is improved, but thermal stress and ventilation requirements increase
Solution Approach 1:
The patent addresses thermal management in composite hood structures by implementing lateral ventilation through side wall openings rather than traditional top openings. This approach removes hot air that accumulates in the engine compartment without requiring additional hood weight or complex active cooling systems, thereby maintaining the weight advantages of composite materials while effectively managing thermal stress.
3Object-affected harmful factors
If a protective grille is added to filter air flow through openings, then contamination protection is improved, but aerodynamic drag increases during vehicle movement
Solution Approach 1:
The patent applies protective grilles selectively at specific locations and orientations on the side openings rather than uniformly across all surfaces. The grille design and placement are optimized to minimize interference with natural airflow patterns while providing necessary filtration. This localized approach protects against contamination at the opening level without significantly increasing overall aerodynamic drag on the vehicle.
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 solution effectively cools the engine compartment by convective heat exchange while preventing water ingress, enhancing the performance and durability of vehicle components by maintaining a dry environment and reducing aerodynamic drag.
Implementation Method 1
The invention relates to a cooling device, particularly for convection cooling, for the engine compartment of a vehicle
Implementation Method 2
each opening being formed by at least one external opening through the outer skin of the hood and at least one internal opening through the hood lining, the external opening extending in a plane approximately perpendicular to the plane of the internal opening. Such a design makes it possible to create a hot air flow path incorporating a baffle that prevents water from entering
Implementation Method 3
The water collector includes at least one channel, in particular with a substantially longitudinal orientation, intended for the flow of the collected water towards the outside of the engine compartment
Data Source
Figure 1~3
Figure 4~5
Figure 6
AI summary
The invention relates to a cooling device (1), in particular by convection, for an engine compartment of a vehicle, comprising at least one passage (3) for the flow of an air stream, in particular a hot air stream from the engine, said passage being partly made by an opening (31, 32, 33) through a hood (2) for closing the engine compartment, each opening (3) being made by at least one external opening (311, 321, 331) made through the outer skin (6) of the hood and at least one internal opening (312, 322, 332) made through the lining (7) of the hood, the external opening (311, 321, 331) extending in a plane approximately perpendicular to the plane of the internal opening (312, 322, 332). The invention also relates to a hood having such a device, as well as a vehicle having such a hood.