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Method and device for operating a transfer pump

A technology of electric transmission and operation mode, which is applied in the direction of electric control of exhaust devices, noise reduction devices, exhaust treatment devices, etc., can solve the problems of difficult measurement and evaluation of current signals, and achieve the effect of reducing sound emissions

Active Publication Date: 2022-06-14
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] For such mode of operation also known as acoustic function or NVH ( N oise- V ibration- H arshness, that is to say the avoidance of noise, vibrations and jerky running), it is problematic that the current signal generated in this manipulation is difficult to communicate between the armature movement and otherwise for pump operation and for the The information aspect of the pump control is evaluated

Method used

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  • Method and device for operating a transfer pump
  • Method and device for operating a transfer pump
  • Method and device for operating a transfer pump

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Embodiment Construction

[0041] figure 1 The technical environment in which the method according to the invention can be used is shown by way of example. Here, the illustration is limited to the components necessary to explain the invention.

[0042] exist figure 1 By way of example, an internal combustion engine 1 designed as a diesel motor is shown in FIG. 2 , which includes a motor block 10 and an exhaust duct 30 in which an exhaust gas flow 20 is guided. The exhaust duct 30 has an exhaust gas purification device which, in the exemplary embodiment shown, has an SCR catalytic converter 40 and an SCR catalytic converter 40 as a catalytically coated component arranged along the flow direction of the exhaust gas. Diesel Particulate Filter 50 (DPF). Before the SCR catalyst 40 , an injection unit 70 , with which the urea-water solution can be injected, is arranged on the exhaust tract 30 . Together with the dosing unit 80 , the injection unit 70 belongs to a dosing system 60 which can be actuated b...

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Abstract

The invention relates to a method and a device, in particular to a control unit, for operating an electric delivery pump configured as a reciprocating diaphragm pump or a reciprocating piston pump, wherein in order to carry out a delivery stroke by partial actuation within the total cycle duration, in During the actuation phase, an actuation voltage is applied to the solenoid coil of the delivery pump in the range of such a long pulse duration that an armature strike of the delivery pump takes place in the time interval following the actuation phase, and by The moment at which the armature strikes is determined by evaluating the current characteristic curve of the coil current flowing through the solenoid coil, wherein the duration of the time interval is predetermined and the end of the pulse duration is selected such that the predetermined given time interval. As a result, a control strategy for the delivery pump that serves to avoid noise, vibrations and rough operation can be optimized with respect to delivery performance and / or noise generation.

Description

technical field [0001] The invention relates to a method for operating an electric delivery pump in the form of a reciprocating diaphragm pump or a reciprocating piston pump, wherein during the actuation phase, in order to carry out the delivery stroke by means of a partial actuation within the total cycle duration, An actuating voltage is applied to the solenoid coil of the feed pump in the range of such a long pulse duration that the armature strike of the feed pump takes place in the time interval (Δt) following the actuation phase, and the The moment when the armature strikes is determined by evaluating the current characteristic curve of the coil current flowing in the electromagnetic coil. [0002] Furthermore, the invention relates to a device, in particular a control unit, for carrying out the method according to the invention. Background technique [0003] In order to meet current exhaust gas legislation, for example, by means of a metering system, a nitrogen oxide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/06F01N3/20F01N9/00
CPCF01N3/2066F01N3/208F04B49/06F01N2610/144F01N2610/02H01F7/18F04B13/00F04B17/04Y02T10/12F01N3/10F01N9/00
Inventor R.约希C.拜尔J.马克坦德
Owner ROBERT BOSCH GMBH