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:
Dec. 11, 2007
Filed:
Sep. 28, 2005
Hikari Todoroki, Fujisawa, JP;
Hiroyuki Itoyama, Yokohama, JP;
Hikari Todoroki, Fujisawa, JP;
Hiroyuki Itoyama, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
A controller () controls the boost pressure of an internal combustion engine () comprising two intake/exhaust units, each intake/exhaust unit comprising a turbocharger () which supercharges intake air in an intake passage () using exhaust energy in an exhaust passage (), and an exhaust gas recirculating device () which recirculates a part of the exhaust gas in the exhaust passage to the intake passage. The controller () calculates an opening difference between valves in the two units (S), and controls a regulating device () in each of the two units on the basis of this opening difference (S-S). As a result, the boost pressures of the turbochargers () match, and hence an equal amount of NOx can be discharged from each exhaust passage (), and the NOx can be purified favorably by a catalyst.