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Method for regulating the lambda value of an internal combustion engine

An internal combustion engine, amplitude technology, applied in the direction of mechanical equipment, engine components, engine control, etc.

Inactive Publication Date: 2011-01-12
VITESCO AUTOMOTIVE ELECTRONICS (CHANGCHUN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the disadvantage of this control system is that in the event of unforeseen changes, the mixture continues to become richer or leaner after the predetermined step-by-step increase or decrease of the lambda value until the exhaust gas detector detects a change from lean to lean again. Rich or change of state from rich to lean
The control loop thus reacts to changes with a delay

Method used

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  • Method for regulating the lambda value of an internal combustion engine
  • Method for regulating the lambda value of an internal combustion engine
  • Method for regulating the lambda value of an internal combustion engine

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Embodiment Construction

[0019] figure 1 Firstly, an internal combustion engine 10 can be seen, which has a crankcase 1 , an inlet duct 2 and an outlet duct 3 . A catalytic converter 4 is arranged in the outlet channel 3 , in which the exhaust gas produced by the internal combustion engine 10 is post-treated so that predetermined HC values, NOx values ​​and CO values ​​are observed. Arranged upstream of the catalytic converter 4 in the flow direction of the exhaust gas is a dual-element lambda probe 6 which serves to measure the composition of the exhaust gas upstream of the catalytic converter 4 . Arranged downstream of the catalytic converter 4 in the direction of flow of the exhaust gas is a second binary detector 5 , by means of which the composition of the exhaust gas after-treatment by the catalytic converter 4 is measured.

[0020] FIG. 2 a shows the control method according to the invention with a subsequent jump part Ps. The exhaust gas composition is shown on the time axis in the upper dia...

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Abstract

The invention relates to a method for regulating the lambda value of an internal combustion engine with a catalytic converter for subsequently treating the exhaust gases of the internal combustion engine, with a binary lambda probe (6), which is mounted upstream from the catalytic converter and which senses the composition of the exhaust gases. According to the invention, the lambda set value is superimposed with a lean / rich amplitude. This lean / rich amplitude has an integral component (I) and a discontinuous component (P) leading back to the lambda set value. When a change (D) that differs from the change in the exhaust gas composition caused by the lean / rich amplitude is detected, the coefficient of the integral component (I) is modified and / or a discontinuous component (P) is added to the integral component or subtracted therefrom.

Description

technical field [0001] The invention relates to a method for regulating the lambda value of an internal combustion engine using a catalytic converter for aftertreatment of exhaust gases and using a dual element lambda probe arranged upstream of the catalytic converter, wherein the light amplitude / rich amplitude (Mager - / Fett-Amplitude) superimposes the theoretical value of lambda. Background technique [0002] In such a control system (preferably a cascade control system), the exhaust gas composition is detected upstream or downstream of the catalytic converter by means of a lambda probe, and the fuel injection quantity of the internal combustion engine is controlled accordingly, so that the desired exhaust gas composition is finally achieved again. This ensures that the lambda value is within the desired range, thereby minimizing the content of HC, NOx and CO. [0003] The exhaust gas emission values ​​depend on the control speed in the control loop, especially in the warm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/14
CPCF02D2041/1409F02D41/1483F02D41/1402F02D41/14F02D43/00F01N9/00
Inventor B·马修斯G·罗塞尔张宏
Owner VITESCO AUTOMOTIVE ELECTRONICS (CHANGCHUN) CO LTD
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