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:
Nov. 10, 1987
Filed:
Jun. 03, 1986
Nippon Soken, Inc., Nishio, JP;
Abstract
In a fuel injection control for diesel engine, in order to eliminate engine noise, particularly, the 'idling knocking' noise occurring during engine idling, by controlling a pilot injection, a method for controlling the fuel injection includes the steps of: detecting an idling state of the diesel engine, pressure in a combustion chamber, engine rotational speed and crank angle to obtain a reference position; selecting a valve opening pressure of a fuel injection nozzle at a relatively low level when the idling state is detected, thereby setting a two peaks characteristic of a fuel injection rate within an extent of the idling rotational speed; and controlling a pressure increment rate in the combustion chamber to within a predetermined value by changing a fuel injection quantity of a pilot injection.