Method and device for reducing running roughness in an internal combustion engine

An internal combustion engine, stability technology, applied in the direction of internal combustion piston engine, combustion engine, mechanical equipment, etc., can solve the problem of increased running instability, and achieve the effect of good running stability

Active Publication Date: 2019-04-09
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the downside, these measures can lead to increased operational instability

Method used

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  • Method and device for reducing running roughness in an internal combustion engine
  • Method and device for reducing running roughness in an internal combustion engine
  • Method and device for reducing running roughness in an internal combustion engine

Examples

Experimental program
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Embodiment Construction

[0038] figure 1 The dependence of the torque 11 on the ignition angle 12 for a constant lambda value 13 is shown schematically in a first flow diagram 10 .

[0039] exist figure 2 The torque 11 as a function of the lambda value 13 for a constant ignition angle 12 is shown schematically in the second flow diagram 10 .

[0040] The speed-dependent function for lambda regulation utilizes the relationship between the generated torque 11(T) and the injected fuel quantity and the ignition angle 12 or the resulting position of the combustion center of gravity, which is injected The fuel quantity corresponds to a lambda value 13 . Since, in addition to the lambda value 13 and the ignition angle 12, the rotational speed and the actual air quantity also have an influence on the generated torque 11, it is important to always use a constant operating point for different ignition angles 12 and / or for The resulting torques 11 for different lambda values ​​13 are compared.

[0041] By c...

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PUM

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Abstract

The invention relates to a method for adjusting an air-fuel ratio for operating an internal combustion engine, a fuel injection quantity is varied from one combustion cycle to a directly or indirectly following the next combustion cycle. The invention further provides a corresponding apparatus, in particular to an engine control unit having at least one controller unit and a memory unit for implementing the method. According to the invention, in order to counteract running non-smoothness, periodic matching of the ignition angle is performed. If the method is used in single-cylinder internal combustion engines of motorcycles, power can be increased, pollutant emissions can be reduced, and a possible optimal compromise between all criteria can be achieved. Furthermore, the running non-smoothness caused by the injection quantity variation can be reduced, thereby resulting in a higher customer acceptability.

Description

[0001] TECHNICAL FIELD The present invention relates to a method for regulating the air-fuel ratio for operating an internal combustion engine, in which the injected fuel quantity changes from one combustion cycle to the directly or indirectly subsequent combustion cycle. [0002] Furthermore, the invention relates to a device, in particular a motor control unit, for carrying out the method. Background technique [0003] In order to reduce emissions in cars with gasoline engines, three-way catalytic converters (3-Wege-Katalysatoren) are usually used as exhaust gas cleaning devices. In the case of a ratio λ, enough exhaust gas can be converted. For this purpose, the air-to-fuel ratio λ is determined by means of an exhaust gas probe arranged upstream of the exhaust gas cleaning device. [0004] For the application case of two-wheeled vehicles with a single-cylinder internal combustion engine, especially low-priced motorcycles such as mopeds (Moped) or low-seat motorcycles (Moto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02P5/145F02D41/00
CPCF02D41/1498F02D41/34F02D2200/1004F02P5/045Y02T10/40
Inventor H·海克斯W·菲舍尔B·赖内克C·施泰因布雷歇尔
Owner ROBERT BOSCH GMBH
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