Browse Prior Art Database

VARYING AIR SPRING RATE WITH VOLUME SPACER

IP.com Disclosure Number: IPCOM000248539D
Publication Date: 2016-Dec-14
Document File: 2 page(s) / 198K

Publishing Venue

The IP.com Prior Art Database

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 85% of the total text.

1

VARYING AIR SPRING RATE WITH VOLUME SPACER

Air springs have two major dimensions that must be met for a given application. The area of the piston

determines the pressure required in the spring for a given load on the spring. The volume of the spring

determines the spring rate of the spring. The issue is that spring rate needs to vary with different weights

of the vehicle due to the need to have a constant ride frequency regardless of loading.

In a typical vehicle design the air spring design would have to change for each increment in loading

cases. This results in a large amount of complexity and cost due to increased tooling for every sub-

component in an air spring. This problem increases as more vehicles are coming with optional hybrid or

electric powertrain which has increases weight from the batteries required.

The solution to this problem is to have a spacer that displaces the volume within the air spring and allows

for a range in spring rates. This is shown in Figure 1 as the Volume Spacer (4). This Volume Spacer (4)

could be placed anywhere within the air spring that wouldn’t have any contact issues with spring travel.

The Air Spring Upper Structure (1) moves separate from the Air Spring Lower Structure (3) with the

Bellow (2) connecting the two. The Volume Spacer (4) would be attached to either the Air Spring Upper

Structure (1) or Air Spring Lower Structure (3) and not contact the other structural component during

motion.

2

Figure 1

The Volume Spacer (4) would al...