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Method and control device for adjusting a temperature of a glow plug

A technology for controlling equipment and glow plugs, which is applied to mechanical equipment, incandescent ignition of engines, engine components, etc., and can solve problems such as adjustment errors

Active Publication Date: 2013-10-30
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the input variables for regulation are ascertained during fluctuations, this leads to errors in the subsequent regulation

Method used

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  • Method and control device for adjusting a temperature of a glow plug
  • Method and control device for adjusting a temperature of a glow plug
  • Method and control device for adjusting a temperature of a glow plug

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Embodiment Construction

[0022] Cooled internal combustion engines, especially diesel engines, require starting aids when the ambient temperature is less than 40°C in order to ignite the fuel-air mixture introduced into the diesel engine. Therefore, the preheating system is used as a starting auxiliary device. The preheating system is composed of a glow plug, a preheating time control device, and a preheating software. The preheating software is stored in the engine control device or the preheating time control device. . In addition, the preheating system is also used to improve vehicle emissions. Other application fields of the preheating system are in combustion exhaust gas systems, in parking heating, in preheating of fuel (flex fuel), or in preheating of cooling water.

[0023] figure 1 Such a preheating system 1 is shown. Here, the glow plug 2 extends into the combustion chamber 3 of the diesel engine 4. The glow plug 2 is connected to the warm-up time control device 5 on the one hand, and is gui...

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PUM

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Abstract

The invention relates to a method for adjusting a temperature of a glow plug, in particular for igniting a fuel / air mixture in an internal combustion engine, wherein the temperature (Tm) of the glow plug (2) is adjusted by means of a regulating system dependent on a resistance (Rm) of the glow plug (2). The aim of the invention is to prevent the occurrence of temperature overhoots during the pre-heating phase of the glow plug. This is achieved in that the temperature (Tm) is regulated using a predictive model (8) in a pre-heating phase in which an overvoltage is applied to the glow plug (2).

Description

Technical field [0001] The invention relates to a method for adjusting the temperature of a glow plug, in particular for igniting the temperature of a fuel-air mixture in an internal combustion engine, wherein the temperature of the glow plug is adjusted by means of a regulating device according to the resistance of the glow plug The invention also relates to a control device for implementing the method. Background technique [0002] Glow plugs are used in internal combustion engines. The glow plugs are used to ignite the fuel-air mixture. The glow plugs are preheated in a cooling state before their temperature is high enough to ignite the fuel-air mixture. In this regard, the glow plug has a heater, which loads the cooled glow plug with excessive thermal stress at a short time interval of 1 to 2 seconds, so that the glow plug is overloaded at this moment. After the mentioned Push-Phase ends, the tip of the glow plug reaches a temperature exceeding 1000°C, while the rest of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02P19/02
CPCF02P19/025F02P19/023F02P19/021
Inventor S.约斯E.扬岑H.里尔
Owner ROBERT BOSCH GMBH
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