Air noise reducing structure of front pillar

Abstract

The invention relates to an air noise reducing structure of a front pillar. The air noise reducing structure reduces air noise of the front pillar of a vehicle with a large rising angle of a windshield. The air noise reducing structure extends perpendicularly along both side edges of the windshield. The front pillar comprises: a vertical wall which rises from both sides of the windshield in a thickness direction of the windscreen; a pillar rib portion extending along the front end of the vertical wall; and a pillar surface extending along the rear side of the pillar rib portion and forming a part of a vehicle body surface. The front pillar has a rising angle equal to or greater than 50 degrees with respect to the horizontal direction. A pillar fitting, which is attached to a surface side of both side edges of the windshield extending along the vertical wall, is substantially square-shaped in the cross section orthogonal to the longitudinal direction. The width of the vertical wall to a front end edge is in a range of 1.5 to 3 times of the height of the pillar rib portion based on the surface of the windshield. The ratio of the height of the front end edge to the width from the vertical wall to the front end edge is in a range of 0.2 to 0.4.

Description

technical field [0001] The present invention relates to an air noise reduction structure of a front pillar portion of a vehicle. Background technique [0002] In small vehicles, etc., where rideability and compactness are emphasized, the rising angles of the front pillars and the windshield are set to be large. When the vehicle is running, the windshield received air flow from the front to the roof side and the sides of the body, but when the front pillars and the windshield are upright, the air flow tends to detour from the front pillars to the side of the body. significantly. [0003] At this time, in the front pillar portion, the airflow flowing in the vehicle width direction separates from the vehicle body surface while rapidly deflecting rearward over the step from the windshield, and vortices are generated on the side of the vehicle body. [0004] When the eddy current collides with the main flow flowing rearward of the side portion of the vehicle body, air noise is ...

AI Technical Summary

Problems solved by technology

In such a vehicle, since the air detours less to the side of the vehicle body, the air noise as described above is small, but the air itself can be suppressed by increasing the step from the windshield to the front pillar. Detour to the side of the body, but this countermeasure cannot be taken in vehicles with a large windshield rise angle

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