Patent · US Active

Algorithm to diagnose leaks or blockages downstream of the secondary air injection reaction (SAIR) pressure sensor

US8136347B2 · kind B2 · utility

3Cited by

3References

13Claims

0Family size

Assignee

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

Ian J. Mac Ewen · White Lake, US
Martin L. Hall · Holly, US
Lawrence O. Murray · White Lake, US
Julia C. Grow · Iron River, US
Richard A. Van Camp · Brighton, US
David Edward Prout · Linden, US
Igor Anilovich · Gaylord, US

Key dates

Filing date	Sep 5, 2008
Grant date	Mar 20, 2012
Priority date	—
Expiry date	Aug 5, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02A50/20
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

A control module and method for an exhaust system of an engine can include a secondary air intake (SAI) pressure module that monitors SAI pressure. An accumulation module can accumulate an SAI string length based on the monitored SAI pressure. A calculation module can determine an average SAI string length based on the accumulated SAI string length. A determination module can determine an operating characteristic of the vehicle exhaust based on the average SAI string length.

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