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1. (WO2017148599) METHOD FOR CONTROLLING AN ELECTROMAGNETICALLY CONTROLLABLE SUCTION VALVE

Pub. No.:    WO/2017/148599    International Application No.:    PCT/EP2017/050070
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Wed Jan 04 00:59:59 CET 2017
IPC: F02M 59/36
F02D 41/38
F02D 41/20
F02D 41/06
F02D 41/40
F02D 41/22
Applicants: ROBERT BOSCH GMBH
Inventors: NECKER, Frieder
Title: METHOD FOR CONTROLLING AN ELECTROMAGNETICALLY CONTROLLABLE SUCTION VALVE
Abstract:
The invention relates to a method for controlling an electromagnetically controllable suction valve (1) for a high-pressure pump (2) in a fuel injection system, wherein, in order to close the suction valve (1), current is supplied to a solenoid (3) such that a magnetic field is built up, the magnetic force of which acts on an armature (5), which is coupled to a valve piston (4), in such a way that the armature moves against the spring force of a spring (6) toward a stroke stop (7) and causes relief of the valve piston (4), which thereupon is pulled into a valve seat (9) by the spring force of a valve spring (8). According to the invention, in the time period between two current supply phases for closing the suction valve (1), current is supplied to the solenoid (3) at times such that the armature (5) is uncoupled from the valve piston (4) and performs a free stroke in order to deaerate a working air gap (10), which is formed between the armature (5) and the stroke stop (7).