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Method and an apparatus for controlling glow plugs in a diesel engine

A technology of glow plugs and engine cylinders, which is applied to incandescent ignition of engines, mechanical equipment, engine ignition, etc., can solve problems such as affecting connectors and inaccurate temperature control.

Inactive Publication Date: 2012-06-20
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, another voltage drop V across resistor R2 representing the impedance of conductor 8 d2 Also affects the connection between the "Battery" terminal BGND and the "Internal Ground" terminal IGND
This means that the voltage used to energize the glow plugs GP1-GP4 is affected by errors caused by ground drift between the "engine ground" terminal EGND and the "internal ground" terminal IGND of the electronic control system 10, so that the temperature control is not correct. accurate

Method used

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  • Method and an apparatus for controlling glow plugs in a diesel engine
  • Method and an apparatus for controlling glow plugs in a diesel engine
  • Method and an apparatus for controlling glow plugs in a diesel engine

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Embodiment Construction

[0039] figure 2 is a circuit diagram of a device for controlling a diesel engine glow plug according to the invention. and figure 1 The similar elements bear similar reference numerals.

[0040] The unit 20 has a first series of 4 inputs, each connected to a respective terminal 1-4, providing said unit with an analog signal representative of the voltage on the corresponding glow plug GP1-GP4. Alternatively, the voltage measured at node A may be used.

[0041] The unit 20 has a second series of 4 inputs, each connected to a respective current sensing device S1-S4, such as a shunt resistor, providing said unit 20 with a signal representative of the current flowing through each glow plug GP1-GP4 during operation.

[0042] exist figure 2 In the arrangement shown, the current sensing devices S1-S4 are arranged between the electronic switches M1-M4 and the glow plugs GP1-GP4. In a substantially equivalent arrangement, the sensor may be arranged between the electronic switches...

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Abstract

A method is provided for controlling a glow plug (GP) associated with a cylinder chamber of a Diesel engine. The method includes, but is not limited to the steps of driving in an on-off manner in a period of time an electronic switch (M) connected essentially in series with the glow plug (GP) between the terminals of a d.c. voltage supply (B), sensing the voltage (V) across the glow plug (GP) and the current (I) flowing through the glow plug (GP) and performing a voltage closed loop control for controlling the temperature of the glow plug (GP). The method further includes, but is not limited to the steps of calculating a normalized current error (epsilonI) as a function of the sensed current (I), calculating a normalized voltage error (epsilonV) as a function of the sensed voltage (V), calculating a weight function (K) as a function of predetermined parameters (alpha, beta, n) and calculating a global error (epsilon) as a function of the normalized current error (epsilonI), normalized voltage error (epsilonV) and weight function (K). Finally, the method includes, but is not limited to the step of combining the voltage closed loop control with a current closed loop control according to the value of the global error (epsilon).

Description

technical field [0001] The present invention relates to a method of controlling a glow plug associated with a diesel engine cylinder chamber, the method comprising the steps of: [0002] - switching an electronic switch connected in series with said glow plug between terminals of a direct voltage supply for a period of time; [0003] - sensing the voltage across said glow plug and the current flowing through said glow plug; and [0004] - Implementing a voltage closed loop control to control the temperature of the glow plug. [0005] The invention also relates to a device for controlling a glow plug associated with a diesel engine cylinder chamber, the device comprising: [0006] An electronic switch substantially in series with a glow plug between the terminals of a DC voltage supply; [0007] sensing means for providing signals representative of the current flowing through said glow plug and the voltage across said glow plug, respectively; and [0008] electronic control...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02P19/02
CPCF02P19/022F02P19/023
Inventor 保罗·卡萨索安杰洛·阿金托菲利波·帕里西斯蒂法诺·尼杜
Owner GM GLOBAL TECH OPERATIONS LLC