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:
Oct. 03, 2017
Filed:
May. 05, 2016
Applicant:
Tula Technology, Inc., San Jose, CA (US);
Inventors:
Masaki Nagashima, Pacific Grove, CA (US);
Mohammad R. Pirjaberi, San Jose, CA (US);
Louis J. Serrano, Los Gatos, CA (US);
Assignee:
Tula Technology, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D 41/04 (2006.01); F02D 41/14 (2006.01); F02D 41/18 (2006.01);
U.S. Cl.
CPC ...
F02D 41/1401 (2013.01); F02D 41/04 (2013.01); F02D 41/18 (2013.01); F02D 2041/141 (2013.01);
Abstract
A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire operation of an engine in order to help reduce undesirable NVH consequences and otherwise smooth the transitions. In general, both feed forward and feedback control are utilized in the determination of the firing fractions during transitions such that the resulting changes in the firing fraction better track cylinder air charge changing dynamics associated with the transition.