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:
Apr. 30, 2013
Filed:
Jan. 04, 2011
Tenghua Tom Shieh, Ann Arbor, MI (US);
Shohei Nomura, Ann Arbor, MI (US);
Kyle Thomas Bernier, Clarkston, MI (US);
Wei Liu, Canton, MI (US);
Tenghua Tom Shieh, Ann Arbor, MI (US);
Shohei Nomura, Ann Arbor, MI (US);
Kyle Thomas Bernier, Clarkston, MI (US);
Wei Liu, Canton, MI (US);
Toyota Motor Engineering & Manufacturing, Erlanger, KY (US);
Abstract
In one embodiment, a method for determining a blow-by gas species concentration may include calculating one-dimensional engine performance data with a one-dimensional engine performance model. The one-dimensional engine performance data may be based at least in part upon an engine operating condition. The one-dimensional engine performance data may be transformed, automatically with a processor executing a two-dimensional ring dynamics model, into piston ring motion data. The two-dimensional ring dynamics model simulates geometrical changes to a piston-ring pack flow path. The blow-by gas species concentration may be determined with a network model including the one-dimensional engine performance model and a two-dimensional ring pack model. The two-dimensional ring pack model simulates species concentration change in the piston-ring pack flow path. The blow-by gas species concentration may be determined using the engine operating condition and the piston ring motion data.