Michael A Jacobs

US Patent:

56787693, Oct 21, 1997

Filed:

Dec 19, 1995

Appl. No.:

8/575048

Inventors:

Michael A. Jacobs - Yorktown VA

Assignee:

Siemens Automotive Corporation - Auburn Hills MI

International Classification:

B05B 130

US Classification:

2395851

Abstract:

A thermostatic air control for assist air to a fuel injector utilizes a bi-metallic ring to seal the air inlets when the engine temperature has increased. This in effect prevents the flow of assist air when the engine is warm and the need for assist air is not required. The bi-metallic ring can have either a positive or negative temperature coefficient and is positioned either on the inside or the outside, respectively of the air assist shroud of either a top or bottom feed fuel injector. A small orifice having a predetermined size and discharge coefficient provides a constant air flow to the output of the injector.

US Patent:

59342510, Aug 10, 1999

Filed:

May 15, 1998

Appl. No.:

9/079345

Inventors:

Michael Alan Jacobs - Yorktown VA

Assignee:

Siemens Automotive Corporation - Auburn Hills MI

International Classification:

F02M 3704

US Classification:

123447

Abstract:

A fuel system damper includes a damper diaphragm, a damper spring, a vacuum bias diaphragm, and a vacuum bias spring. The damper spring is biased between the damper diaphragm and the vacuum bias diaphragm, and the vacuum bias spring is biased against the vacuum bias diaphragm in the top chamber of the damper. A bottom chamber below the damper diaphragm is open to allow fuel from the fuel rail into the chamber so that the damper diaphragm can respond to pressure pulsations in the fuel. The top chamber has an opening that communicates with an engine intake manifold so that when engine intake manifold pressure decreases to very low levels, the vacuum bias diaphragm will travel up. This upward motion reduces the pressure in the fuel rail by removing load from the damper spring. When the pressure regulation setpoint is reached, the regulator will supply fuel to maintain pressure.