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Method for heating and regenerating a particulate filter in the exhaust gas of a gasoline engine

A particle filter, gasoline engine technology, applied to machines/engines, mechanical equipment, exhaust devices, etc., can solve problems such as insufficient accuracy and unsatisfactory

Active Publication Date: 2021-12-03
ROBERT BOSCH GMBH
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Problems solved by technology

[0008] A prerequisite for optimal operation is that there is a definite relationship between λ at the installation location of the second oxygen sensor and the signal of this second oxygen sensor, since otherwise the exact regulation of the air quantity λ is based on this signal. resistance is not sufficient and cannot tolerate higher emissions or damage to the particulate filter
Because usually the signal of the second oxygen sensor is affected by the different sensitivity of the second oxygen sensor to oxygen and the relative sensitivity of the second oxygen sensor to different exhaust gas components (such as CO, CO 2 、H 2 、H 2 O, HC, NO X ) and since the exhaust gas composition can differ under different operating conditions even at the same exhaust gas lambda, this precondition is generally not fulfilled for broadband oxygen sensors and jump oxygen sensors

Method used

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  • Method for heating and regenerating a particulate filter in the exhaust gas of a gasoline engine
  • Method for heating and regenerating a particulate filter in the exhaust gas of a gasoline engine
  • Method for heating and regenerating a particulate filter in the exhaust gas of a gasoline engine

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Embodiment Construction

[0027] figure 1Otto engine 10 with air introduction system 12 , first exhaust system 14 . 1 and controller 16 is shown in detail. In the air introduction system 12, an air mass meter 18 and a throttle valve 19 arranged downstream of the air mass meter 18 are arranged. The air flowing into the gasoline engine 10 through the air introduction system 12 is mixed with gasoline in the combustion chamber 20 of the gasoline engine 10, and the gasoline is directly injected into the combustion chamber 20 through the injection valve 20 or in the combustion chamber 20. Injection before the intake valve of the chamber. The resulting combustion chamber filling is ignited and combusted by means of an ignition device 24 , for example a spark plug. Angle of rotation sensor 25 detects the angle of rotation of the shaft of internal combustion engine 10 and thus allows controller 16 to trigger the ignition in a predetermined angular position of the shaft. A driver desire sensor 38 detects the ...

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Abstract

A method is described for heating and regenerating a particle filter (26) which is arranged downstream of a catalytic converter (30) in the exhaust gas flow of an Otto engine (10), wherein the Otto engine (10) has A device (50) for introducing secondary air into the exhaust gas flow between the catalytic converter (30) and the particle filter (26). The method is characterized in that the lateral sensitivity of an oxygen sensor arranged between the catalytic converter and the particle filter is compensated for a further exhaust gas component than oxygen. Further dependent claims relate to a gasoline engine, a computer program product and a machine-readable medium.

Description

technical field [0001] The invention relates to a method for heating and regenerating a particle filter which is arranged downstream of a catalytic converter in the exhaust gas flow of an Otto engine, wherein the Otto engine has a device for regenerating a secondary Air is introduced into the exhaust gas flow between the catalytic converter and the particulate filter. [0002] Furthermore, the invention relates to an internal combustion engine with such a device, a computer program product and a computer-readable medium. Background technique [0003] This method and this internal combustion engine are assumed to be known per se. In modern engine control systems, an oxygen sensor is used for detecting the oxygen concentration in the exhaust gas and for lambda regulation of the gasoline engine. Broadband oxygen sensors (Breitband-Lambdasonden) and jump oxygen sensors (Sprung-Lambdasonden) are used here. [0004] Broadband oxygen sensors are generally used where rich or lean...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N9/00F01N11/00F01N3/30
CPCF01N3/30F01N9/00F01N11/007F01N3/101F01N3/2033F01N3/22F01N9/002F01N3/023F01N3/025F01N2250/02F01N2260/04F01N2430/06F01N2560/022F01N2560/024F01N2560/025F01N2610/03F01N2900/1402
Inventor M.普法伊尔M.布莱M.法伊
Owner ROBERT BOSCH GMBH
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