APPARATUS FOR AUTOMATICALLY DRAINING WATER ACCUMULATED IN A FUEL FILTER OF A VEHICLE, PARTICULARLY FOR DIESEL ENGINES

摘要

An automatic bleed unit for a fuel filter typically for diesel engines, comprises sensor means (220, 230) associated with the chamber (5) of the filter (1) where the water present in the fuel accumulates, a withdrawal device (7) provided for discharging said water when this reaches a predetermined level and a microprocessor (14) connected to said sensor means and to said withdrawal device such as to activate this latter, with the vehicle engine at rest and the relative electrical system live. Said sensor means comprises a differential level reading and monitoring system comprising two measurement members, each sensitive to a level between said predetermined level and the depth of said accumulation chamber and is connected to said microprocessor. When the water reaches the predetermined level said microprocessor energizes said withdrawal device in response to the signal emitted by one or the other of said measurement members.