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Method, data processing system and computer program product for calculating motor characteristic parameters

A data processing system and characteristic parameter technology, applied in special data processing applications, mechanical equipment, engine control, etc., can solve complex computing storage capacity and computing power, difficult to see the relationship, etc.

Active Publication Date: 2018-04-13
ROLLS ROYCE SOLUTIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In addition to the mentioned disadvantages of complex calculations and a high demand for memory capacity and computing power, it also occurs in the known approaches that it can be difficult to see the course of the combustion curve in the calculated or equivalent combustion curve Direct correlation with the motor characteristic parameters accepted in the model

Method used

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  • Method, data processing system and computer program product for calculating motor characteristic parameters
  • Method, data processing system and computer program product for calculating motor characteristic parameters
  • Method, data processing system and computer program product for calculating motor characteristic parameters

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Embodiment Construction

[0036] figure 1 a) shows a schematic representation of the equivalent injection curve towards EV. The injection curve course EV is plotted on the ordinate, which typically specifies the injected fuel mass per time unit, in particular in kg / s. The crank angle φ of the internal combustion engine, which is typically specified in °KW (crank angle), is plotted as a scale of time on the abscissa. The injection curve EV has an essentially trapezoidal curve shape, which is described by four control points E1 , E2 , E3 , E4 , wherein they are connected to one another by straight line sections. In an alternative embodiment of the method, preferably at least one straight line segment (which connects two control points to one another) is replaced by another function, preferably by a rounded and / or weighted function. Particularly preferably, all essentially trapezoidal equivalent injection curve profiles EV are described by a profile weighted with a predetermined function. In particular...

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Abstract

A method for calculating the motor characteristic parameters of an internal combustion engine is proposed, with the following steps: The equivalent injection curve course (KV ), that is, the control points (E1, E2, E3, E4) are calculated from at least one first motor characteristic parameter, and the control points (B1, B2, B3, B4, B5, B6, B7, B8 ) to determine the equivalent combustion curve trend (BV), that is, at least one control point (B1, B2, B3, B4 is calculated from the equivalent injection curve trend (EV) and at least one second motor characteristic parameter ,B5,B6,B7,B8).

Description

technical field [0001] The invention relates to a method for calculating motor characteristic parameters of an internal combustion engine according to claim 1 , a data processing system according to the preamble of claim 12 and a computer program product according to claim 13 . Background technique [0002] Methods of the type mentioned here are known. In this method, at least one motor characteristic parameter of the internal combustion engine is calculated with the aid of a combustion model, which allows zero-dimensional (OD) calculation of the energy release rate, ie the so-called combustion profile of the internal combustion engine. The expression “zero-dimensionally” is here understood to mean that the complete combustion curve course is calculated purely as a function of time for the cylinder in question. The dependence of the course of the combustion curve on the position in the combustion chamber of the cylinder is therefore not taken into account. In this case, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/24F02D41/14
CPCF02D41/2406F02D2041/1433G06F30/20G06F17/10
Inventor R.施佩岑Y.布龙纳
Owner ROLLS ROYCE SOLUTIONS GMBH