Patent · US Active

System and method for knock detection based on ethanol concentration in fuel

US8478511B2 · kind B2 · utility

10Cited by

6References

20Claims

0Family size

Assignee

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

Wajdi B. Hamama · Iron River, US
Craig M. Sawdon · Williamston, US
Eric Ferch · Westland, US
Matthew David Defever · Farmington Hills, US
Hillary L. Broadus · Wixom, US

Key dates

Filing date	Oct 6, 2010
Grant date	Jul 2, 2013
Priority date	—
Expiry date	Jan 17, 2032

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2200/0611
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A knock detection system for an engine includes an intensity module, a knock threshold module, and a detection module. The intensity module determines an engine vibration intensity during a first period of engine operation. The knock threshold module determines a knock threshold based on an ethanol concentration in a fuel supplied to the engine. The detection module determines whether engine knock has occurred during the first period by comparing the knock threshold and the engine vibration intensity.

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