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Method and control apparatus for operating reciprocating piston type internal combustion engine

A technology of reciprocating pistons and internal combustion engines, applied in engine control, internal combustion piston engines, combustion engines, etc., can solve problems such as reducing full-load lubrication, and achieve the effects of reducing CO2 emissions, water consumption, and fuel consumption.

Pending Publication Date: 2019-12-20
BAYERISCHE MOTOREN WERKE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to measures for reducing full load lubrication (e.g. Miller combustion method) or water injection with only limited potential

Method used

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  • Method and control apparatus for operating reciprocating piston type internal combustion engine

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] figure 1 Typical operating characteristic curves for a reciprocating internal combustion engine are shown graphically. On the Y-axis the torque M of the internal combustion engine is shown d (unit is Nm). The rotational speed n of the internal combustion engine (in 1 / min) is shown on the X-axis. The characteristic curve is divided into three approximate regions.

[0026] The first zone 1 from the minimum speed n of the reciprocating internal combustion engine min Extended up to the maximum rotational speed n of the reciprocating internal combustion engine max and from the minimum torque Md min Extend approximately until medium torque Md mittel .

[0027] In the diagram, the second zone 2 is approximately from the medium torque Md mittel Extended up to the maximum torque Md max And from the minimum speed n min Extend approximately up to medium rpm n mittel .

[0028] In the diagram, the third zone 3 is approximately from medium speed n mittel Extended up to ...

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Abstract

The invention relates to a method for operating a reciprocating piston type internal combustion engine with a variable compression ratio. From an idle rotation speed to a maximal rotation speed, during the period when the low load is increased to a middle load, the reciprocating piston type internal combustion engine is operated under a high compression ratio; from an idle rotation speed to a middle rotation speed, during the period when the middle load is increased to a maximal load, the reciprocating piston type internal combustion engine is operated under a low compression ratio; and from the middle rotation speed, during the period when the middle load is increased to the maximal load, the reciprocating piston type internal combustion engine is operated under a high compression ratio.When the reciprocating piston type internal combustion engine is operated according to the technical scheme mentioned above, the specific power of stoichiometric combustion is improved. The inventionalso relates to a control apparatus.

Description

technical field [0001] The invention relates to a method for operating a reciprocating piston internal combustion engine. Background technique [0002] For the technical context of internal combustion engines with variable compression ratios, reference is made, for example, to German laid-open document DE 10 2016 200 190 A1. Said publication describes a method for function monitoring of a device for variable setting of cylinder compression in a reciprocating piston internal combustion engine. The method has the following steps: [0003] - determining the value of a motor parameter indicating the position of the internal combustion engine at a defined cylinder compression, [0004] - comparing the value sought with another value of the motor parameter, and [0005] - According to the result of said comparison, [0006] - Determining whether the device for variably adjusting the cylinder compression is functioning correctly. [0007] In addition, reference is made to Germ...

Claims

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Application Information

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IPC IPC(8): F02D15/00
CPCF02D15/00F02D2200/101Y02T10/12
Inventor C·罗伊莱因M·韦策尔
Owner BAYERISCHE MOTOREN WERKE AG
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