Research on Modeling of Hydropneumatic Suspension Based on Fractional Order

Table 1

Working states of each valve in compression and rebound strokes.

	Piston velocity	Working valves
Compression stroke	Low	Throttle 4
	High	Throttle 4 + relief valve 5
Rebound stroke	Low	Throttle 4
	High	Throttle 4 + relief valve 6