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:
Oct. 07, 1997
Filed:
Apr. 30, 1996
Niels John Beck, Bonita, CA (US);
Servojet Products International, San Diego, CA (US);
Abstract
A gaseous fuel injection system for a cylinder of an internal combustion engine assures uniform mixing of the gaseous fuel with an air stream being inducted into the cylinder by injecting the gaseous fuel into the air stream at a relatively high velocity, preferably of between a Mach number of 0.5 and a Mach number of 1.0. High Mach injection can be achieved in a remarkably simple and effective manner by 1) using a single or at most a few injection conduit(s) and discharge orifice(s) for each intake port as opposed to a configuration having multiple discharge orifices at a single point in the air intake system upstream of the intake manifold, 2) by setting the relative effective flow areas of the injector metering orifice C.sub.d A1 and conduit discharge orifice C.sub.d A2 such that C.sub.d A2 is between 2 and 5 times greater than C.sub.d A1, and by 3) setting the gas supply pressure to be more than four times the air intake manifold absolute pressure. The resulting system is not only simpler and less expensive than supply systems having a high number of discharge orifices at a single upstream point, but also provides more uniform mixing and permits pulsating injection so that a stratified fuel charge can be supplied to the cylinders.