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2015-18 CHEVROLET CITY EXPRESS CARGO VAN BODY BUILDER MANUAL
Analysis Method
1.
Plot the relation between the lift height (E) and the load on rear wheels (W RO) for raising the front wheels and the relation
between the lift (E) and the load on the front wheels (W FO) for raising the rear wheels. Draw a regression line for both cases with
front or rear wheels raised.
2.
Obtain the shifted load (∆ W RO and ∆ W FO) for the lift (E) according to the graph. ∆ W RO and ∆ W FO with E = 0.5 m (1.6 ft.)
shall be representative value.
3.
Calculate the CG height by using the following equations:
Results
The center of gravity height (GC V) obtained is theoretically the same for both cases with the front or rear wheels
raised. The accuracy of the results should be verified by performing several tests and averaging the results.
Vehicle Center of Gravity Envelope — Unloaded Vehicle Weight (UVW)
The diagrams below show the vehicle center of gravity envelope. [The center of gravity (CG) envelopes are not
restrictive as long as the accessory reserve capacity (ARC) weight is lower than the envelope restriction weight]
The CG zone shall not be exceeded by any upfitter package.
Pa g e | 53
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