| 摘要 |
<p>The invention relates to a fuel flowmeter (110) for being fed by a pump (112) having an inlet (112a) and an outlet (112b), said flowmeter comprising: • a metering valve (114) having an inlet (114a) and an outlet (114b), said valve being arranged downstream from the outlet of the pump; • a return circuit (122) connecting the inlet of the metering valve to the inlet of the pump; and a pressure regulator device (116) comprising a movable valve member suitable for closing and opening the return circuit, a pressure difference detection surface (118) fastened to the valve member (124) and axially separating a first chamber (126) in communication with the inlet of the metering valve from a second chamber (130) in communication with the outlet from the metering valve, a piston (150) axially separating the second chamber (130) from a third chamber (152) connected to the outlet of the metering valve, said piston including a coupling member (170) suitable for co-operating with the valve member, a second spring (164) arranged in the third chamber while exerting axial thrust on the piston tending to keep the piston decoupled from the valve member, the regulator device also including a channel (154) putting the second chamber (130) in communication with the third chamber (152) .</p> |
