Quiescent chamber hot gas igniter
An engine has an ignition source in a combustion chamber of the engine. An inner housing is provided that includes one or more jet apertures and defines an inner chamber containing the ignition source. An outer housing (or pre-chamber) is provided that includes one or more jet apertures in communication with the main combustion chamber and defines an outer chamber containing the inner housing.
1. A method of igniting an air-fuel mixture in an internal combustion engine, the method comprising:
feeding a first portion of air-fuel mixture from a main combustion chamber of the internal combustion engine into an inner housing of a pre-chamber chamber of the internal combustion engine through an aperture extending through a valve closure in the pre-chamber, the valve closure sealing a jet aperture between the inner housing and an outer housing of the pre-chamber;
igniting the first portion of air-fuel mixture in the inner housing;
retaining the ignited first portion of air-fuel mixture in the inner housing with the sealed jet aperture;
moving the valve closure with respect to the jet aperture to open the jet aperture, the open jet aperture releasing the ignited first portion of air-fuel mixture from the inner housing into the outer housing;
igniting a second portion of air-fuel mixture in the outer housing with the ignited first portion of air-fuel mixture from the inner housing; and
igniting a third portion of air-fuel mixture in the main combustion chamber with the ignited second portion of air-fuel mixture from within the outer housing.
2. The method of claim 1 , further comprising igniting the first portion of air-fuel mixture in the inner housing with heat from a heated surface in the inner housing.
3. The method of claim 2 , where retaining the ignited first portion of air-fuel mixture in the inner housing further comprises maintaining the ignited first portion of air-fuel mixture in the inner housing in a relatively more quiescent state than air-fuel mixture outside of the inner housing.
4. The method of claim 1 , where feeding the first portion of air-fuel mixture into the inner housing comprises feeding the first portion of air-fuel mixture into the inner housing from the outer housing through the aperture of the valve closure.
5. The method of claim 1 , where the inner housing comprises an inner housing of an igniter plug; and
where the outer housing comprises an outer housing of the igniter plug.
6. The method of claim 1 , further comprising moving the valve closure to seal the jet aperture.
7. The method of claim 1 where feeding the first portion of air-fuel mixture into the inner housing comprises feeding the first portion of air-fuel mixture into the inner housing from the main combustion chamber through a central jet tunnel of the outer housing and the aperture of the valve closure.