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. 14, 2005
Filed:
Jul. 07, 2004
Takao Maitani, Isehara, JP;
Masayuki Tomita, Yokohama, JP;
Tsutomu Kikuchi, Tokyo, JP;
Masahiko Yuya, Yokohama, JP;
Takao Maitani, Isehara, JP;
Masayuki Tomita, Yokohama, JP;
Tsutomu Kikuchi, Tokyo, JP;
Masahiko Yuya, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
During start-up of an in-cylinder fuel injection spark ignition engine (), an engine controller () calculates a start-up fuel injection pulse width TIST on the basis of a cooling water temperature Tw, an engine rotation speed Ne, and a fuel supply pressure Pf to a fuel injector () (S). When the fuel supply pressure Pf exceeds a required fuel pressure, the engine controller () executes stratified combustion by means of compression stroke fuel injection. By setting the required fuel pressure precisely in accordance with a start-up condition defined by the start-up fuel injection pulse width TIST and the engine rotation speed Ne, the opportunities for stratified combustion during start-up increase, and the amount of hydrocarbon discharge decreases.