Method and device for controlling internal combustion engine

A technology for control devices and internal combustion engines, applied in engine control, fuel injection control, internal combustion piston engines, etc., can solve problems such as black smoke emissions, system errors, and unsatisfactory emissions, and achieve reduced system dispersion, high dynamic accuracy, Effect of High Static Accuracy

Inactive Publication Date: 2008-10-01
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the limitation of the fuel quantity to be injected based on the air quantity signal of a corresponding sensor has a systematic error when the charge pressure changes
As a result, either there is a corresponding black smoke emission in some acceleration situations, or there is a loss of power, so that it is no longer possible to accelerate accordingly
In addition to this systematic error, dispersion in the fuel injection system and in the area of ​​the air mass measurement leads to undesired emissions or power losses

Method used

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  • Method and device for controlling internal combustion engine
  • Method and device for controlling internal combustion engine
  • Method and device for controlling internal combustion engine

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Embodiment Construction

[0015] Hereinafter, the method of the present invention will be described by taking the amount of fuel to be injected as an example. Instead of oil volume, other parameters that characterize oil volume can also be used. In particular, the torque value, fuel volume and / or control time of the corresponding control device can be used.

[0016] In FIG. 1, the main components of the internal combustion engine control device are shown as a block diagram. The controller is represented by 100. The controller also has an adjustment value setter 110 and a model 120. The output signal of the first sensor 130 and the output signal of the second sensor 140 are input into the controller 100. The first sensor mainly transmits signals to the adjustment value setter 110, and the second sensor mainly transmits signals to the model 120. Here, the drawings are only examples, because various sensors can not only send signals to the adjustment value setter 110, but also send signals to the model 120.

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Abstract

Disclosed are a method and a device for controlling an internal combustion engine, in which a limiting value to which a variable characterizing the quantity of fuel to be injected is limited, can be predefined based on operating parameters. Said limiting value can be predefined according to an output signal of an air system model.

Description

Technical field [0001] The invention relates to a control method and device for an internal combustion engine. Background technique [0002] A control method and device for an internal combustion engine, especially a compression ignition internal combustion engine, are disclosed, in which a limit value is predetermined based on an operating characteristic parameter and a parameter that characterizes the amount of fuel to be injected is limited to the limit value. This limit value is referred to as the maximum allowable oil quantity below. This limit value is determined, for example, in relation to the normally measured incoming fresh air volume, so that no unacceptable smoke emission occurs. Afterwards, select the amount of fuel to be injected, which does not exceed the maximum allowable fuel amount in relation to the working conditions. In this way, it is possible to avoid the generation of black smoke that is clearly visible especially when accelerating at full load. [0003] I...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): F02D41/18F02D41/10F02D41/38F02D45/00F02D41/04F02D41/14F02D41/40
CPCF02D41/40F02D2041/1433Y02T10/44F02D2250/38F02D41/1454F02D41/182F02D41/38F02D41/10F02D2200/703F02D2250/32Y02T10/40
InventorT·布莱勒A·米查尔斯克B·克劳斯A·鲁普R·克尼茨C·梅德尔
OwnerROBERT BOSCH GMBH