System for controlling air/fuel ratio in a gas flow containing gaseous fuel
AssigneeOdena Engineering
InventorLars Svensson
Life of this patent
Estimating the term…
Abstract
A system for controlling air/fuel ratio in an air/fuel mixture supplied to a premix burner for gaseous fuels includes a blower (310) for inducting and pressurising combustion air, a Venturi-pipe (330) for governing a rate of gas to be mixed into the combustion air, and a pressure regulator (230) interconnecting a source of gaseous fuel to a supply point in the Venturi pipe (330). A preheated reaction chamber (500) and a lambda sond (620) are connected to a controller (350) controlling an amount of air bypassing said Venturi-pipe (330).
Claims7
System for controlling an air/fuel ratio in an air/fuel mixture delivered to a premix burner, the system comprising:
- a blower for inducting and pressurizing combustion air,
- a feed system for fuel,
- a Venturi-pipe connected to the blower and the feed system, wherein a flow of air through the Venturi-pipe controls a flow of fuel through the feed system,
- a preheated reaction chamber connected to a lambdasond, and
- a bypass duct for combustion air, wherein a flow of air through the bypass duct is controlled responsive to a signal from the lambdasond, and wherein the air flow through the bypass duct does not pass through the Venturi-pipe.
Dependencies are inferred from the claim text.