Patent · US Active

Method for calculating a residual gas mass in a cylinder of an internal combustion engine and controller

US10612477B2 · kind B2 · utility

0Cited by

6References

3Claims

0Family size

Assignee

VOLKSWAGEN AKTIENGESELLSCHAFT · DE

Inventors

Elmar Millich · Berlin, DE
Lars Petersen · Meinersen, DE
Andre Shurkewitsch · Calberlah, DE

Key dates

Filing date	Jan 30, 2017
Grant date	Apr 7, 2020
Priority date	—
Expiry date	Jan 30, 2037

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method of calculating a residual gas mass in a cylinder of an internal combustion engine, wherein the cylinder has at least one intake valve and one exhaust valve, comprising: obtaining a cylinder residual gas mass base value that is based on a predefined model; determining a first cylinder residual gas mass value that indicates a cylinder residual gas mass remaining in the cylinder clearance volume after an expulsion of exhaust gas; determining a second cylinder residual gas mass value that indicates a cylinder residual gas mass flowing into the cylinder due to a valve overlap of the intake valve and the exhaust valve, wherein the second cylinder residual gas mass value is determined based on the cylinder residual gas mass base value and the first cylinder residual gas mass value; and calculating the residual gas mass in the cylinder, based on the first and second cylinder residual gas mass values.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.