A support system for stabilizing a high-pressure feed line in a high-speed water jet food portioner, comprising a rigid span assembly connected at one end to an extendable universal joint that provides rotational motion around two axes as well as linear freedom along a third axis, and at the other end to a rod-end bearing that permits motion about two axes at a fixed attachment point. The cup portion can include a porous metal outer layer having a first thickness and a solid titanium inner layer having a second thickness. For different combustion modes, different system states, control variables, and actuators are carefully chosen for different controllers based on the characteristics of the corresponding combustion mode as well as sensor and measurement limitations. When computing a size of the parked vehicle from the advance distance data items, the size of the parked vehicle is determined to be shorter than an aggregated distance corresponding to the advance distance data items. Closed valves 12 and 13 are on chambers 6 and 7 and suction tubes 18a and 18b are connected to inflow passages 16a and 16b of members 14 and 15 and, at another end, are connected to common suction tube 18.