Method and device for charge detection in a cylinder of an internal combustion engine

An internal combustion engine and cylinder technology, applied in electrical control, mechanical equipment, engine control, etc., can solve the problems of limited charge detection accuracy and large amount of calculation, and achieve the effect of reducing errors and improving stability
CN106460711BActive Publication Date: 2020-03-06VOLKSWAGEN AG
7 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
VOLKSWAGEN AG
Publication Date
2020-03-06

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a method (10) for charge detection in a cylinder of an internal combustion engine, wherein the cylinder is connected to an intake manifold via an intake valve and to an exhaust duct via an exhaust valve. The method (10) includes the step of providing (102) a database having information related to the exhaust gas back pressure (p ag ) data sets related to the amount of aeration components, wherein the step of providing (102) the database comprises: providing (100) measurement data (30) measured at the test bench, and providing (101) the calculated by means of ventilation calculations The simulated data (31) of , determine (103) the basic function (20) that qualitatively describes the relationship between the amount of charge components and the exhaust back pressure (p ag ) and adapt (104) the base function (20) to at least one data set of the database by appropriate selection of variable parameters of the base function (20).
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a method and a device for charge detection in a cylinder of an internal combustion engine. Background technique

[0002] In order to operate the internal combustion engine of a motor vehicle with lower fuel consumption and reduced emissions of pollutants, the proportions of fresh air, residual gas and scavenging gas for the cylinder charge are adjusted by appropriately adjusting the intake and exhaust valves. For this purpose, in a four-stroke engine, for example, the four process steps of intake, compression, power and exhaust are traversed. During intake, the intake valve is opened just before the piston reaches top dead center, wherein the exhaust valve remains open. After passing top dead center, close the exhaust valve. The intake valve is not closed again until the piston has reached bottom dead center and has moved partially upwards again. Especially for internal combustion engines based on the Miller cycle method, th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More