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:
Jul. 19, 2005
Filed:
Jul. 08, 2003
Frank Warren Hunt, West Bloomfield, MI (US);
Ayumu Miyajima, Farmington Hills, MI (US);
George Saikalis, West Bloomfield, MI (US);
Jonathan Borg, Livonia, MI (US);
Shigeru Oho, Farmington Hills, MI (US);
Frank Warren Hunt, West Bloomfield, MI (US);
Ayumu Miyajima, Farmington Hills, MI (US);
George Saikalis, West Bloomfield, MI (US);
Jonathan Borg, Livonia, MI (US);
Shigeru Oho, Farmington Hills, MI (US);
Hitachi, Ltd., Tokyo, JP;
Abstract
A cold start fuel control system is disclosed for use with an internal combustion engine having a plurality of combustion chambers, a source of fuel and an intake manifold having an inlet and an outlet port connected to each combustion chamber. The system includes a cold start fuel injector assembly having an inlet and an outlet to provide a vapor fuel charge during a cold start engine condition. The cold start fuel injector assembly inlet is fluidly connected to the source of fuel. An auxiliary intake manifold has an internal chamber and the cold start fuel injector assembly outlet is fluidly connected to the auxiliary intake manifold chamber. The auxiliary intake manifold chamber is then fluidly connected through a control orifice to each of the combustion chambers at a position downstream from the inlet of the primary intake manifold. A control circuit optionally controls the area of the control orifice to minimize noxious emissions from the engine and a shroud is optionally associated with each control orifice to enhance mixing of the vapor fuel with the inducted airflow to also minimize noxious emissions from the engine.