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Method for isolating quantity errors of a fuel amount and an air amount supplied to at least one cylinder of an internal combustion engine

A technology of internal combustion engine and fuel quantity, applied in the direction of internal combustion engine testing, internal combustion piston engine, analysis of materials, etc., can solve the problems of inaccurate pre-control, burden, etc.

Inactive Publication Date: 2016-03-02
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the motor is operated with an inaccurate pilot control, which can lead to a burden on the environment

Method used

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  • Method for isolating quantity errors of a fuel amount and an air amount supplied to at least one cylinder of an internal combustion engine
  • Method for isolating quantity errors of a fuel amount and an air amount supplied to at least one cylinder of an internal combustion engine
  • Method for isolating quantity errors of a fuel amount and an air amount supplied to at least one cylinder of an internal combustion engine

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Embodiment Construction

[0032] exist figure 1 , a section of an internal combustion engine, for example a gasoline motor or a diesel motor, is shown schematically and designated 100 . Internal combustion engine 100 has a computing unit designed as controller 110 , which is set up to carry out an embodiment of the method according to the invention. Additionally, the internal combustion engine 100 includes multiple cylinders, of which only the first cylinder 102 is shown for clarity. The first cylinder block 102 of the internal combustion engine 100 includes a combustion chamber 101 , which is supplied with a fresh air volume via a throttle flap 112 and an intake line 114 arranged between the throttle flap 112 and an inlet valve 115 . Arranged in the suction pipe is an air quality sensor 124 which detects fresh air as the supplied gas mass or gas quantity. The air quality sensor 124 transmits the measured value for the supplied air quantity to the controller 110 .

[0033] Furthermore, a fuel quanti...

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Abstract

The invention relates to a method for determining quantity errors of a fuel quantity and an air quantity supplied to at least one cylinder (102) of an internal combustion engine (100). In a first phase, a cylinder equalization of the internal combustion engine is performed, and an error of the fuel quantity supplied to the at least one cylinder is determined therefrom. In a second phase, the internal combustion engine (100) is operated with a stoichiometric ratio of air quantity and fuel quantity, a characteristic of the at least one cylinder that correlates with an indicated medium pressure is detected, and an error in the air amount supplied to the at least one cylinder is determined from the characteristic that correlates with the indicated medium pressure.

Description

technical field [0001] The invention relates to a method for determining a quantity error of a fuel quantity and an air quantity supplied to at least one cylinder of an internal combustion engine. Background technique [0002] In internal combustion engines, in particular gasoline motors, a fresh air quantity or an air quantity and a fuel quantity are supplied to the individual cylinders of the internal combustion engine during a combustion cycle. The air volume is measured here by means of measurement technology. The dosing of the fuel quantity takes place by means of a suitable pilot control as a function of the air quantity, so that a stoichiometric combustion is set. Possible discrepancies in the air quantity and / or fuel quantity are detected by a lambda sensor and compensated by a lambda regulation of the fuel quantity. This intervention of the lambda control can be adapted and used for improved pilot control, ie to generate a more precise fuel quantity for the determ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/00F02D41/14F02D41/24F02D41/22
CPCF02D41/0085F02D41/1498F02D41/221Y02T10/40G01N33/0009G01N33/225G01M15/08
Inventor A.哈斯登托伊费尔G.波滕M.瓦尔茨U.米勒A.富克斯鲍尔
Owner ROBERT BOSCH GMBH
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