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Method and device for lambda adjustment and ignition angle adjustment

A technology of ignition angle and operating point, applied in fuel injection control, engine control, machine/engine, etc., can solve problems such as limiting analysis scheme, and achieve the effect of good robustness, improved robustness, and increased power

Active Publication Date: 2015-03-25
ROBERT BOSCH GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the analysis options are strongly limited due to the superposition of cylinder effects

Method used

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  • Method and device for lambda adjustment and ignition angle adjustment
  • Method and device for lambda adjustment and ignition angle adjustment
  • Method and device for lambda adjustment and ignition angle adjustment

Examples

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Embodiment Construction

[0039] figure 1 The graph 10 schematically shows the torque 11 as a function of the ignition angle 12 for a constant lambda value 13 .

[0040] exist figure 2 A further diagram 10 schematically shows the torque 11 as a function of the lambda value 13 for a constant ignition angle 12 .

[0041] The speed-dependent function for lambda control and ignition angle control uses the resulting torque 11 (T) with the injected fuel quantity corresponding to the lambda value 13 and the ignition angle 12 or the resulting center of gravity of the combustion positional relationship. Since, in addition to the lambda value 13 and the ignition angle 12, the rotational speed 16(n) and the actual air quantity also have an influence on the resulting torque 11, it is important that the resulting torque 11 for different ignition angles 12 and / or The torques 11 of different lambda values ​​13 are always compared while the operating point remains the same.

[0042] By varying the ignition angle ...

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PUM

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Abstract

The invention relates to a method for lambda adjustment and ignition angle adjustment of combustion in an internal combustion engine provided with at least one cylinder. The optimum air-fuel ratio or the optimum ignition angle is determined by the following features. The features can be used for determining an estimated value of torque and are based on analysis on the rotation speed of a crankshaft in the internal combustion engine. The invention also provides a corresponding device, especially an engine control unit provided with at least one adjusting unit and a storage unit to implement the method. As an adjusting parameter, the injected fuel amount or the ignition angle changes among different values from a next combustion circle to a directly or indirectly followed combustion circle, and changes of the features based on the rotation speed are analyzed to estimate the torque. By utilization of the method and the device, the efficiency or the maximum power is increased or discharge of harmful compounds is reduced, or a trade-off scheme for achieving all standards as good as possible can be obtained.

Description

technical field [0001] The invention relates to a method for lambda regulation and ignition angle regulation of combustion in an internal combustion engine having at least one cylinder, wherein an optimum air-fuel ratio or an optimum ignition angle is determined by means of which An estimated value for the torque can be determined and the characteristic is based on an analysis of the rotational speed of the crankshaft in the internal combustion engine. [0002] Furthermore, the invention relates to a device, in particular an engine control unit, for carrying out the method. Background technique [0003] In order to reduce emissions in vehicles with gasoline engines, 3-way catalytic converters are usually used as exhaust gas purification devices, which reform the exhaust gases sufficiently only when the air-fuel ratio λ is set with high precision. For this purpose, the air-fuel ratio λ is measured by means of an exhaust gas sensor mounted upstream of the exhaust gas purifica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/00
CPCF02D37/02F02D41/0097F02D41/1497F02D2200/1004F02D2200/101
Inventor C.施泰因布雷歇尔B.赖内克H.海克斯W.菲舍尔D.罗斯H.哈梅多维奇L.纳克
Owner ROBERT BOSCH GMBH
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