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:
Sep. 23, 2003
Filed:
Sep. 25, 2001
Koichiro Yomogida, Fujisawa, JP;
Kazutaka Ohishi, Fujisawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
When common rail pressure Pr is predetermined pressure Prai, which is low such that it is lower than the pressure for the initiation of fuel injection by the injectors (step ), air-extraction pulse width Pwai, which is elected in accordance with a fixed value or the engine rotation speed (step ), is elected as the final pulse width Pwf (step ). Also, since air that is entrained with fuel is discharged at low pressure, along with fuel, from the pressure control chamber of the injectors, via a open/close valve, which opens based on pulse width Pwai, and via a discharge path, it is possible to avoid the effect, on the combustion characteristic, that arises due to the injection of entrained air, along with fuel, from nozzle holes into the combustion chamber.