Torch passage construction for stratified charge engine

Claim 2

In an internal combustion piston engine, the combination of: walls forming a main combustion chamber, a piston forming one wall of said chamber, means forming an auxiliary combustion chamber, a spark plug having electrodes communicating with said auxiliary combustion chamber, means including a main intake passage for supplying a relatively lean air-fuel mixture to said main combustion chamber, means including an auxiliary intake passage for supplying a relatively rich air-fuel mixture to said auxiliary combustion chamber, a relatively long torch passage extending from said auxiliary combustion chamber to said main combustion chamber and having an outlet end positioned near the center of said main combustion chamber, said torch passage being positioned at a location remote from said spark plug electrodes, and a relatively short suction conduit intersecting said torch passage at a location between its ends and extending to a peripheral zone of said main combustion chamber, the cross section area of said torch passage being greater than that of said suction conduit, whereby movement of burning air-fuel mixture through said torch passage aspirates a flow of air-fuel mixture from said main combustion chamber through said suction conduit into said torch passage.

Claim 3

In an internal combustion piston engine, the combination of: walls forming a main combustion chamber, a piston forming one wall of said chamber, means forming an auxiliary combustion chamber, a spark plug having electrodes communicating with said auxiliary combustion chamber, means including a main intake passage for supplying a relatively lean air-fuel mixture to said main combustion chamber, means including an auxiliary intake passage for supplying a relatively rich air-fuel mixture to said auxiliary combustion chamber, a torch passage extending from said auxiliary combustion chamber to said main combustion chamber and having an outlet end positioned near the center of the main combustion chamber, the torch passage having a short cylindrical portion adjacent said auxiliary chamber and having a long tapered portion flaring therefrom toward said main chamber, said torch passage being located at a position remote from said spark plug electrodes, and a suction conduit intersecting said tapered portion of said torch passage at a location adjacent said cylindrical portion and extending to a peripheral zone of said main combustion chamber, said torch passage being longer than said suction conduit, the cross section area of said torch passage being greater than that of said suction conduit, whereby movement of burning air-fuel mixture through said torch passage aspirates a flow of air-fuel mixture from said main combustion chamber through said suction conduit into said torch passage.

Claim 4

In an internal combustion piston engine, the combination of: walls forming a main combustion chamber, a piston forming one wall of said chamber, means forming an auxiliary combustion chamber, a spark plug having electrodes communicating with said auxiliary combustion chamber, means including a main intake passage for supplying a relatively lean air-fuel mixture to said main combustion chamber, means including an auxiliary intake passage for supplying a relatively rich air-fuel mixture to said auxiliary combustion chamber, a torch passage extending from said auxiliary combustion chamber to said main combustion chamber and having an outlet end positioned near the center of the main combustion chamber, the torch passage having a short cylindrical portion adjacent said auxiliary chamber and having a long tapered portion flaring therefrom toward said main chamber, said torch passage being located at a position remote from said spark plug electrodes, and a suction conduit intersecting said tapered portion of said torch passage at a location adjacent said cylindrical portion and extending to a peripheral zone of said main combustion chamber, said torch passage being longer than said suction conduit, the cross section area of said torch passage being greater than that of said suction conduit, whereby movement of burning air-fuel mixture through said torch passage aspirates a flow of air-fuel mixture from said main combustion chamber through said suction conduit into said torch passage.

Claim 5

In an internal combustion piston engine, the combination of: walls forming a main combustion chamber, a piston forming one wall of said chamber, means forming an auxiliary combustion chamber, a spark plug having electrodes communicating with said auxiliary combustion chamber, means including a main intake passage for supplying a relatively lean air-fuel mixture to said main combustion chamber, means including an auxiliary intake passage for supplying a relatively rich air-fuel mixture to said auxiliary combustion chamber, a torch passage extending from said auxiliary combustion chamber to said main combustion chamber and having an outlet end positioned near the center of said main combustion chamber, the torch passage having a short cylindrical portion adjacent said auxiliary chamber and having a long tapered portion flaring therefrom toward said main chamber, said torch passage being positioned at a location remote from said spark plug electrodes, and a suction conduit intersecting said torch passage at the junction of the cylindrical portion and the tapered portion, and extending to a peripheral zone of said main combustion chamber, said torch passage being longer than said suction conduit, the cross section area of said torch passage being greater than that of such suction conduit, whereby movement of burning air-fuel mixture through said torch passage aspirates a flow of air-fuel mixture from said main combustion chamber through said suction conduit into said torch passage.

Claim 6

In an internal combustion piston engine, the combination of: walls forming a main combustion chamber, a piston forming one wall of said chamber, means forming an auxiliary combustion chamber, a spark plug having electrodes communicating with said auxiliary combustion chamber, means including a main intake passage for supplying a relatively lean air-fuel mixture to said main combustion chamber, means including an auxiliary intake passage for supplying a relatively rich air-fuel mixture to said auxiliary combustion chamber, a torch passage extending from said auxiliary combustion chamber to said main combustion chamber and having an outlet end positioned near the center of said main combustion chamber, the torch passage having a short cylindrical portion adjacent said auxiliary chamber and having a long tapered portion flaring therefrom toward said main chamber, said torch passage being positioned at a location remote from said spark plug electrodes, and a suction conduit intersecting said torch passage at the junction of the cylindrical portion and the tapered portion, and extending to a peripheral zone of said main combustion chamber, said torch passage being longer than said suction conduit, the cross section area of said torch passage being greater than that of such suction conduit, whereby movement of burning air-fuel mixture through said torch passage aspirates a flow of air-fuel mixture from said main combustion chamber through said suction conduit into said torch passage.

Claim 7

In an internal combustion piston engine, the combination of: walls forming a main combustion chamber, a piston forming one wall of said chamber, means forming an auxiliary combuston chamber, a spark plug having electrodes communicating with said auxiliary combustion chamber, means including a main intake passage for supplying a relatively lean air-fuel mixture to said main combustion chamber, means including an auxiliary intake passage for supplying a relatively rich air-fuel misture to said auxiliary combustion chamber, a torch passage extending from said auxiliary combustion chamber to said main combustion chamber and having an outlet end positioned near the center of said main combustion chamber, the torch passage having a short cylindrical portion adjacent said auxiliary chamber and having a long tapered portion flaring therefrom toward said main chamber, said torch passage being positioned at a location remote from said spark plug electrodes, and a plurality of diverging suction conduits each intersecting said torch passage at a junction of the cylindrical portion and the tapered portion, and extending to a peripheral zone of said main combustion chamber, said torch passage being longer than said suction conduits, the cross section area of said torch passage being greater than that of such suction conduits, whereby movement of burning air-fuel mixture through said torch passage aspirates a flow of air-fuel mixture from said main combustion chamber through said suction conduits into said torch passage.

Claim 8

In an internal combustion piston engine, the combination of: walls forming a main combustion chamber, a piston forming one wall of said chamber, means forming an auxiliary combuston chamber, a spark plug having electrodes communicating with said auxiliary combustion chamber, means including a main intake passage for supplying a relatively lean air-fuel mixture to said main combustion chamber, means including an auxiliary intake passage for supplying a relatively rich air-fuel misture to said auxiliary combustion chamber, a torch passage extending from said auxiliary combustion chamber to said main combustion chamber and having an outlet end positioned near the center of said main combustion chamber, the torch passage having a short cylindrical portion adjacent said auxiliary chamber and having a long tapered portion flaring therefrom toward said main chamber, said torch passage being positioned at a location remote from said spark plug electrodes, and a plurality of diverging suction conduits each intersecting said torch passage at a junction of the cylindrical portion and the tapered portion, and extending to a peripheral zone of said main combustion chamber, said torch passage being longer than said suction conduits, the cross section area of said torch passage being greater than that of such suction conduits, whereby movement of burning air-fuel mixture through said torch passage aspirates a flow of air-fuel mixture from said main combustion chamber through said suction conduits into said torch passage.

Claim 9

In an internal combustion piston engine, the combination of: walls forming a main combustion chamber, a piston forming one wall of said chamber, means forming an auxiliary combustion chamber, a spark plug having electrodes communicating with said auxiliary combustion chamber, means including a main intake passage for supplying a relatively lean air-fuel mixture to said main combustion chamber, means including an auxiliary intake passage for supplying a relatively rich air-fuel mixture to said auxiliary combustion chamber, a torch passage extending from said auxiliary combustion chamber to said main combustion chamber and having an outlet end positioned near the center of said main combustion chamber, the torch passage having a relatively small-diameter short cylindrical portion adjacent said auxiliary chamber and an aligned relatively large-diameter long cylindrical portion extending therefrom to said main chamber, said torch passage being positioned at a location remote from said spark plug electrodes, and a suction conduit intersecting said large-diameter portion of said torch passage at a location between its ends and extending to a peripheral zone of said main combustion chamber, the cross section area of said torch passage being greater than that of said suction conduit, whereby movement of burning air-fuel mixture through said torch passage aspirates a flow of air-fuel mixture from said main combustion chamber through said suction conduit into said torch passage.

Claim 10

In an internal combustion piston engine, the combination of: walls forming a main combustion chamber, a piston forming one wall of said chamber, means forming an auxiliary combustion chamber, a spark plug having electrodes communicating with said auxiliary combustion chamber, means including a main intake passage for supplying a relatively lean air-fuel mixture to said main combustion chamber, means including an auxiliary intake passage for supplying a relatively rich air-fuel mixture to said auxiliary combustion chamber, a torch passage extending from said auxiliary combustion chamber to said main combustion chamber and having an outlet end positioned near the center of said main combustion chamber, the torch passage having a relatively small-diameter short cylindrical portion adjacent said auxiliary chamber and an aligned relatively large-diameter long cylindrical portion extending therefrom to said main chamber, said torch passage being positioned at a location remote from said spark plug electrodes, and a suction conduit intersecting said large-diameter portion of said torch passage at a location between its ends and extending to a peripheral zone of said main combustion chamber, the cross section area of said torch passage being greater than that of said suction conduit, whereby movement of burning air-fuel mixture through said torch passage aspirates a flow of air-fuel mixture from said main combustion chamber through said suction conduit into said torch passage.

Claim 11

In an internal combustion piston engine, the combination of: walls forming a main combustion chamber, a piston forming one wall of said chamber, means forming an auxiliary combustion chamber, a spark plug having electrodes communicating with said auxiliary combustion chamber, means including a main intake passage for supplying a relatively lean air-fuel mixture to said main combustion chamber, means including an auxiliary intake passage for supplying a relatively rich air-fuel mixture to said auxiliary combustion chamber, a torch passage extending from said auxiliary combustion chamber to said main combustion chamber and having an outlet end positioned near the center of said main combustion chamber, said torch passage having a restricted portion between its ends and a suction conduit intersecting said torch passage at said restricted portion and extending to a peripheral zone of said main combustion chamber, said torch passage being positioned at a location remote from said spark plug electrodes, the cross section area of said torch passage being greater than that of said suction conduit, whereby movement of burning air-fuel mixture through said torch passage aspirates a flow of air-fuel mixture from said main combustion chamber through said suction conduit into said torch passage.

Claim 12

In an internal combustion piston engine, the combination of: walls forming a main combustion chamber, a piston forming one wall of said chamber, means forming an auxiliary combustion chamber, a spark plug having electrodes communicating with said auxiliary combustion chamber, means including a main intake passage for supplying a relatively lean air-fuel mixture to said main combustion chamber, means including an auxiliary intake passage for supplying a relatively rich air-fuel mixture to said auxiliary combustion chamber, a torch passage extending from said auxiliary combustion chamber to said main combustion chamber and having an outlet end positioned near the center of said main combustion chamber, said torch passage having a restricted portion between its ends and a suction conduit intersecting said torch passage at said restricted portion and extending to a peripheral zone of said main combustion chamber, said torch passage being positioned at a location remote from said spark plug electrodes, the cross section area of said torch passage being greater than that of said suction conduit, whereby movement of burning air-fuel mixture through said torch passage aspirates a flow of air-fuel mixture from said main combustion chamber through said suction conduit into said torch passage.