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Method and device for operating an internal combustion engine with a variable injection profile

A technology of internal combustion engine and profile, applied in the direction of fuel injection control, mechanical equipment, engine control, etc., which can solve the problems of increased pollutant emissions

Active Publication Date: 2022-03-01
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This can lead to an increase in pollutant emissions

Method used

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  • Method and device for operating an internal combustion engine with a variable injection profile
  • Method and device for operating an internal combustion engine with a variable injection profile
  • Method and device for operating an internal combustion engine with a variable injection profile

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Embodiment Construction

[0032] exist figure 1 , schematically shows an engine system with an internal combustion engine 1 having a plurality of cylinders 2 (four cylinders in the present exemplary embodiment). The internal combustion engine 1 can be designed as a diesel engine or a gasoline engine and can be driven accordingly in four-stroke operation.

[0033] The cylinders 2 of the internal combustion engine 1 are supplied with fresh air via an air supply system 3 . The supply of fresh air enters an injection valve 7 in each cylinder 2 via an intake manifold 6 . In the air supply system 3, a charging device (e.g. a turbocharger), a throttle valve and an exhaust gas recirculation device can optionally be provided, so that the amount of fresh air flowing into the cylinder 2 and its composition can be adjusted respectively (for example, oxygen concentration).

[0034] Combustion exhaust gases can be removed from the cylinders 2 by means of the exhaust gas removal system 4 . For this purpose, the c...

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PUM

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Abstract

The invention relates to a method for operating an internal combustion engine (1) with a predetermined injection profile defined by adapted injection parameters ( ), the method having the following steps: State-injection profile characteristic field to obtain the steady-state injection parameter (); -Refer to the predetermined corrected injection parameter model to obtain the corrected-injection parameter (), the corrected injection parameter model is based on the internal combustion engine (1) one or more state quantities of the air supply system (3) and / or exhaust gas removal system (4) to provide a correction-injection parameter ( ); parameters() in order to obtain the adapted injection parameters().

Description

technical field [0001] The invention relates to an internal combustion engine, in particular an internal combustion engine in which fuel can be operated with one or more pilot injections and one or more main injections, depending on a predetermined injection profile. In particular, the invention relates to measures for adapting the injection profile during transient engine operation. Background technique [0002] In one or more pilot injections and one or more main injections, fuel injection into the cylinders of the internal combustion engine can be carried out corresponding to a predeterminable injection profile. Depending on, for example, the current engine speed and the required load of the internal combustion engine, the injection profile can be predetermined by a characteristic field. [0003] During dynamic engine operation, the state variables of the air system of the internal combustion engine generally only follow the set, corresponding setpoint value of the air s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/24F02D41/26F02D41/40F02D41/30F02D41/14F02D41/00
CPCF02D41/008F02D41/1444F02D41/2406F02D41/30F02D2041/1434F02D2200/0406F02D2200/0414F02D2200/0602F02D2200/1004
Inventor W.菲舍尔M.比策尔S.格罗德P.科特曼T.马科维基
Owner ROBERT BOSCH GMBH