Method for operating switching valve of fuel conveying device of combustion engine mounted in motor car, involves changing amplitude and/or duration and/or timing of control until change of voltage falls below threshold value

摘要

#CMT# #/CMT# The method involves controlling the actuator device (9) temporarily such that a movable armature of the actuator device before reaching an end position is braked. The control for braking of the armature is determined so that change of applied voltage of the coil of electromagnetic actuator device in a time interval is determined so that the armature reached the end position. The amplitude and/or duration and/or timing of the control are changed until the change of voltage falls below the threshold value. #CMT# : #/CMT# An independent claim is included for computer program for operating switching valve. #CMT#USE : #/CMT# Method for operating switching valve of fuel conveying device of combustion engine mounted in motor car, using control and/or regulating device (all claimed). #CMT#ADVANTAGE : #/CMT# The operation noise of the switching valve over entire service life independent of manufacturing tolerances is significantly reduced, since optimum deceleration can be achieved independent of the service life and the manufacturing tolerances. The crash energy when reaching the end position, which corresponds to rest chair and/or stroke stop of the armature and/or valve element, is reduced. The positional accuracy of the switching valve is increased. The amplitude and/or duration and/or timing of the control are changed so that braking is changed. The wear of the switching valve showing over the service life can be accounted and the operation noise be permanently lowered. Since the quantity control valve is switched with a relatively high frequency, the operating noise of the flow control valve is significantly reduced. The optimum control of the quantity control valve in each case can take place in operation for rotation speeds above idling speed. The defined controllable operating areas are no longer required due to a very high switching frequency of the quantity control valve, so that end position of the armature and/or of valve element is no longer reached. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of the fuel conveying device of combustion engine. 1 : Fuel conveying device 2 : Combustion engine 9 : Actuator device 11 : High pressure pump 16 : Control and/or regulating device.