The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 2015
Filed:
Jul. 19, 2012
J. Michael Gwidt, Brighton, MI (US);
Karen Margaret-bell Gwidt, Brighton, MI (US);
J. Michael Gwidt, Brighton, MI (US);
Karen Margaret-Bell Gwidt, Brighton, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A stochastic pre-ignition (SPI) mitigation system includes a detection module, an engine load module, and an evaluation module. The detection module generates a pre-ignition determination signal indicating detection of a SPI event in a cylinder of an engine. The engine load module determines load on the engine and generates an engine load signal based on the load. The evaluation module determines whether to operate in a single-pulse mode or a multi-pulse mode and generating a mode signal to operate in a selected one of the single-pulse mode and the multi-pulse mode based on the pre-ignition determination signal and the engine load signal. The single pulse mode includes injecting a single pulse of fuel into the cylinder during a first per combustion cycle of the cylinder. The multi-pulse mode includes injecting multiple pulses of fuel into the cylinder during a second combustion cycle of the cylinder.