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:
Feb. 27, 2001
Filed:
Mar. 29, 2000
Shigehisa Takase, Kanagawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
Disclosed a common-rail fuel-injection system employing an auxiliary injection such as a pilot injection system, in which when a desired amount of fuel to be injected in the auxiliary injection is less than a set value, the feedback control ceases to keep the combustion against becoming unstable. When a desired amount of fuel to be injected in the auxiliary injection is proved on comparison at step,to be less than a minimum amount of fuel injected, which is the lower limit detectable according to both of the common-rail pressure and a pressure drop in the common-rail pressure owing to the fuel injection, the minimum amount of fuel injected serves on step,as a corrected, desired amount of fuel to be injected in the auxiliary injection. Thus, the fuel injection is achieved in accordance with the corrected, desired amount of fuel to be injected in the auxiliary injection, thereby keeping the feedback control at the auxiliary injection from becoming unstable. As an alternative, the minimum amount of fuel injected may be replaced with a set value, which is defined on the basis of the minimum amount of fuel injected.