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. 01, 1992
Filed:
Nov. 14, 1990
Dietmar Henkel, Neumarkt, DE;
MAN Nutzfahrzeuge AG, Munich, DE;
Abstract
The invention relates to a method and a device for intermittently injecting fuel into a combustion chamber of a combustion engine. Efforts to reduce the emission of pollutants and the noise level of Diesel engines are geared towards a control of the heating process. According to the present invention this is achieved by employing the valve needle of the injection valve as a control member for the fuel supply into the pressure chamber of the valve body, whereby the valve needle is actuated to open and close the valve at a high frequency in short intervals. In conjuction with the high fuel pressure, a good droplet size distribution is realized which leads to a homogeneous fuel-air mixture. Dividing the fuel injection process into short intervals by relatively simple design measures results in an extended heating period which positively influences the NO.sub.x contents.