The pumping process can be divided in the suction action and the pumping action. During the suction action oil is supplied at a low pressure with the help of a small 0.2-liter accumulator. This accumulator is needed to avoid cavitation in the system. The supply pressure is about 5 bar. The oil passes the suction valves. These are simple non-return valves, designed to be positioned close to the hydraulic cylinder, minimizing the dead volume in this cylinder.
On the other side of the hydraulic pump cylinder the oil passes for the second time through the non-return valves, which direct the oil towards the high-pressure side of the system. The Chiron delivers oil to the high-pressure side both during the compression stroke and during the expansion stroke.