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Method for monitoring a controller for an injection system in a motor vehicle

A technology of injection device and controller, which is applied in the direction of fuel injection control, engine control, electrical control, etc., and can solve the problem of no monitoring of overload protection controller

Active Publication Date: 2016-08-03
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Previously, depending on the boundary conditions or limiting factors, the efficiency of the corresponding controllers was calculated very precisely by means of the corresponding modules; however, at present there is no reasonable monitoring in the sense of overload protection controllers

Method used

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  • Method for monitoring a controller for an injection system in a motor vehicle
  • Method for monitoring a controller for an injection system in a motor vehicle
  • Method for monitoring a controller for an injection system in a motor vehicle

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Embodiment Construction

[0034] exist figure 1 A possible embodiment of the functions implemented in the control module according to the invention for the final stage of the piezo valve is shown in detail in . The shown function first calculates the maximum permissible actuation frequency shown in level 11 , which the piezo valve final stage can adjust taking into account all constraints. The internal variable is present in the unit "Number of activations per unit time", which corresponds to the technical requirements of the final stage of the piezo valve, until at the output of the function in the unit "Number of activations per cylinder and load cycle" in the same Speed-dependent factor S rescaled (Umskalierung) expressed as N MAX .

[0035] figure 1 Basically divided into two parts. In the upper half (above the dotted line) the limiting factor according to the maximum permissible effective current load of the controller is shown. Here, the maximum frequency depends on the so-called rail pressu...

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Abstract

The invention relates to a method for monitoring a control unit for an injection system in a motor vehicle, wherein a maximum permissible triggering frequency for the control unit is determined and monitored during the operating time of the control unit, wherein in the The factor limiting the maximum triggering frequency is determined in the corresponding operating point of the controller and is directly entered into the determination of the maximum permissible triggering frequency. Furthermore, the invention relates to a corresponding control module and a controller with such a control module.

Description

technical field [0001] The invention relates to a method for monitoring the configuration of a controller for an injection system in a motor vehicle, in particular for a solenoid valve injector and / or a piezo valve injector. Furthermore, the invention relates to a suitable control module for carrying out the method provided according to the invention and to a controller in which such a control module is integrated. Background technique [0002] For the injection final stages in control units for so-called common-rail solenoid valve injectors and piezo valve injectors, there are different limitations or limitations with regard to the maximum output power available. The limiting elements or factors here are: [0003] a) The maximum output power of the DC voltage converter to be used or the DC / DC converter that is part of the corresponding controller, or the capacity of the connected buffer capacitor (also called damping capacitor). Such converters are required in piezoelectr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D35/00F02D41/22
CPCF02D35/0007F02D41/22Y02T10/40
Inventor J-H.巴特S.舍姆普E.通纳B.奥斯滕多夫
Owner ROBERT BOSCH GMBH