Patent ID: 7261556

Claim:
A combustion apparatus comprising: a pre-combustion chamber comprising an ignition zone and an exit, said pre-combustion chamber further comprising a fuel inlet and a first oxidizer inlet adjacent said ignition zone, said first oxidizer inlet providing a first oxidizer flow rate proximate said ignition zone insufficient to combust all of said fuel provided by said fuel inlet proximate said ignition zone, a second oxidizer inlet providing a second oxidizer flow rate into said pre-combustion chamber adjacent said exit, and a third oxidizer inlet providing a third oxidizer flow rate into said pre-combustion chamber between said ignition zone and said second oxidizer inlet, wherein said first oxidizer inlet accounts for between about 5-10% of total oxidizer inlet, said second oxidizer inlet accounts for between about 50-80% of total oxidizer inlet, and said third oxidizer inlet accounts for between about 10-40% of total oxidizer inlet; and a combustion chamber comprising an entrance and an exhaust, said entrance in communication with said pre-combustion chamber exit.