Gaseous Engine Fuel Delivery

Patent metadata

Field	Value
Publication number	US-2016153402-A1
Application number	US-201615013555-A
Country	US
Kind code	A1
Filing date	Feb 2, 2016
Priority date	Aug 28, 2013
Publication date	Jun 2, 2016
Grant date	—

Abstract

A fuel delivery system may be utilized in an internal combustion engine or a generator engine. The fuel delivery system includes a fuel injector and a venturi. The venturi provides a force for delivering the fuel into the manifold of the engine, and the fuel injector provides metering to control the amount of fuel delivered into the manifold of the engine. In one example, the fuel delivery system includes a first chamber configured to enclose a gaseous fuel, a second chamber configured to direct a flow of air through the venturi, and a plunger. The plunger is controlled to selectively connect and disconnect the first chamber and the second chamber to control the flow of the gaseous fuel into the second chamber under a differential pressure of the venturi.

First claim

We claim:

1 . A gaseous engine fuel delivery system, comprising:
a first chamber configured to enclose a gaseous fuel; a second chamber configured to direct a flow of air through a venturi; and a plunger configured to selectively connect and disconnect the first chamber and the second chamber to control the flow of the gaseous fuel into the second chamber under a differential pressure of the venturi.

2 . The gaseous engine fuel delivery system of claim 1 , wherein the venturi is downstream of a throttle with respect to the flow of air.

3 . The gaseous engine fuel delivery system of claim 2 , wherein the flow of air downstream of the throttle and upstream of the venturi includes a level of fuel below a minimum level.

4 . The gaseous engine fuel delivery system of claim 1 , comprising:
a pressure regulator configured to supply the gaseous fuel to the first chamber.

5 . The gaseous engine fuel delivery system of claim 1 , comprising:
a controller configured to generate a drive signal for the plunger according to an input signal.

6 . The gaseous engine fuel delivery system of claim 5 , wherein the input signal is generated by a manifold pressure sensor.

7 . A control system comprising:
a communication interface configured to receive input data; and a controller configured to generate, in response to the input data, at least one control signal for a gaseous engine to move a plunger to mix a flow of air and gaseous fuel by selectively connecting a venturi pressure from the flow of air through an intake manifold to a chamber of the gaseous engine.

8 . The control system of claim 7 , wherein the at least one control signal specifies a ratio for the gaseous fuel and the flow of air.

9 . The control system of claim 7 , wherein the at least one control signal includes a first component for a first cylinder and a second component for a second cylinder, and the first component is different than the second component.

10 . The control system of claim 7 , wherein the at least one control signal includes data indicative of a pressure in the intake manifold of the gaseous engine.

11 . A gaseous engine fuel delivery system, comprising:
a first chamber configured to enclose a gaseous fuel; a second chamber configured to direct a flow of air; and a plunger configured to selectively connect and disconnect the first chamber and the second chamber to control the flow of the gaseous fuel into the second chamber under a differential pressure; and a controller configured to generate at least one drive signal for the plunger, wherein the at least one drive signal includes a plurality of drive signals, and each of the plurality of drive signals is associated with a cylinder.

12 . The gaseous engine fuel delivery system of claim 11 , wherein a venturi is downstream of a throttle with respect to the flow of air.

13 . The gaseous engine fuel delivery system of claim 12 , wherein the flow of air downstream of the throttle and upstream of the venturi includes a level of fuel below a minimum level.

14 . The gaseous engine fuel delivery system of claim 11 , comprising:
a pressure regulator configured to supply the gaseous fuel to the first chamber.

15 . The gaseous engine fuel delivery system of claim 11 , wherein at least one of the plurality of drive signals is generated based on data from a manifold pressure sensor.

16 . The gaseous engine fuel delivery system of claim 15 , wherein the data from the manifold sensor indicates an increase in pressure, the at least one of the plurality of driving signals activates the plunger.

17 . The gaseous engine fuel delivery system of claim 11 , wherein a first signal of the plurality of drive signals includes a first duty cycle and a second signal of the plurality of drive signals includes a second duty cycle.

18 . The gaseous engine fuel delivery system of claim 17 , wherein the first duty cycle corresponds to a first cylinder and the second duty cycle corresponds to a second cylinder.

19 . The gaseous engine fuel delivery system of claim 11 , wherein at least one of the plurality of drive signals is configured to energize a solenoid for the plunger.

20 . The gaseous engine fuel delivery system of claim 11 , wherein at least one of the plurality of drive signals is generated based on sensor data.

Assignees

• Kohler Co

Inventors

• Frampton Isaac S
• Danforth Iii Robert J

Classifications

• F02M35/10118

  with variable cross-sections of intake ducts along their length; Venturis; Diffusers · CPC title

• F02M35/10262

  Flow guides, obstructions, deflectors or the like (for generating a charge motion in the cylinder F02B31/00; for re-atomising condensed fuel or homogenising fuel-air mixture F02M29/00) · CPC title

• F02M21/047 Primary

  Venturi mixer · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title

• Y02T10/30

  Use of alternative fuels, e.g. biofuels · CPC title