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:
Nov. 20, 2018
Filed:
Apr. 02, 2013
Applicant:
Regents of the University of Minnesota, St. Paul, MN (US);
Inventors:
Assignee:
Regents of the University of Minnesota, Minneapolis, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02B 71/00 (2006.01); F02B 71/04 (2006.01); F02B 63/06 (2006.01); F02D 35/02 (2006.01); F02D 41/14 (2006.01);
U.S. Cl.
CPC ...
F02B 71/00 (2013.01); F02B 63/06 (2013.01); F02B 71/04 (2013.01); F02B 71/045 (2013.01); F02D 35/02 (2013.01); F02D 35/023 (2013.01); F02D 35/025 (2013.01); F02D 41/1497 (2013.01);
Abstract
Motion control of a hydraulic free-piston engine is achieved in order to enable advanced combustions such as low temperature combustion. To accomplish this, an active controller acts as a virtual crankshaft, which causes a piston to follow a reference trajectory using energy from a storage element. Given the periodic nature of free-piston engine motion, an advanced controller of the present invention is preferably of robust repetitive type that is capable of tracking periodic reference signals.