Method for the combined identification of phase differences of the inlet valve stroke and of the outlet valve stroke
US10711717B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 2017 |
| Grant date | Jul 14, 2020 |
| Priority date | — |
| Expiry date | Aug 10, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Various embodiments include a method for identifying valve stroke phase differences during operation comprising: measuring dynamic pressure oscillations in the air intake tract; generating a corresponding signal; acquiring a crankshaft phase angle; acquiring the phase position and the amplitude of a signal frequency of the oscillations based on the pressure oscillation using discrete Fourier transformation; acquiring a line of an equal phase position and of equal amplitude of the signal frequency reflecting the inlet and the outlet stroke phase difference using reference lines; acquiring a common intersection point of a line of equal phase position and a line of equal amplitude by projection into a common plane; and determining the stroke phase differences and from the common intersection point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.