Vehicle Engine Head Cover Flow Redirecting and Shielding
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Solution Overview
Problem
Existing vehicle engine upper structures face challenges in cooling the exhaust device effectively while protecting parts on the upper surface from hot air, as they either compromise cooling efficiency or allow hot air to expose these parts to erosion when the vehicle is stationary.
Innovation Solution
The proposed solution involves a flow redirecting member and a shield cover configuration, where the flow redirecting member guides air streams to the exhaust device during travel, and the shield cover blocks hot air from entering the gap between the head cover and design cover when the vehicle is stationary, protecting the upper surface parts by directing hot air towards the hood.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the gap between the design cover and head cover is blocked to prevent hot air from flowing into the gap, then parts on the upper surface are protected from hot air erosion, but the exhaust device cannot be effectively cooled by air streams during vehicle travel
Solution Approach 1:
The design cover is divided into two functional regions: a front portion with a lower surface that redirects air streams toward the exhaust device for cooling, and a rear portion with a shield cover that blocks hot air from entering the gap and damaging parts. This segmentation allows simultaneous achievement of cooling and protection functions.
Solution Approach 2:
Different regions of the design cover are given different functional properties: the front region has an inclined lower surface for air stream redirection and cooling, while the rear region has a shield cover for hot air blocking and part protection. Each local region is optimized for its specific function.
2Temperature
If the gap between the design cover and head cover is left open to allow air stream cooling of the exhaust device, then cooling efficiency is improved, but hot air can flow into the gap and expose parts to erosion when the vehicle is stationary
Solution Approach 1:
The design cover is segmented into functional regions: the front portion maintains an open gap with an inclined lower surface for air stream access and cooling, while the rear portion incorporates a shield cover to block hot air intrusion and protect parts during stationary conditions.
Solution Approach 2:
The design cover exhibits local quality differentiation: the front region is configured for maximum cooling efficiency with an open structure and inclined surface, while the rear region is configured for part protection with a shield cover that blocks hot air flow.
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
This configuration effectively cools the exhaust device with air streams produced during vehicle travel while preventing hot air from exposing upper surface parts to erosion, maintaining both cooling efficiency and part protection.
Implementation Method 1
an air stream which is produced by a traveling vehicle and which has flowed into the engine compartment flows through the gap between the flow redirecting member disposed above the rear portion of the head cover and the hood
Implementation Method 2
hot air rising from the exhaust device may flow into the gap between the design cover and the head cover
Data Source
AI summary
In a rear exhaust engine, an upper portion of a rear portion of a head cover is provided with a first flow redirecting member facing upward and extending rearward and downward toward an exhaust device. A shield cover extending in a width direction of a vehicle is provided behind the first flow redirecting member. The shield cover has a shield surface extending from an upper end portion of the head cover toward a hood and directed rearward. The shield cover is designed such that its upper end is located below a rear end of the first flow redirecting member.