Internal combustion engine with igniter cooling sleeve
AssigneePratt & Whitney Canada Corp.
InventorsMichael Lanktree, Edwin Schulz
Life of this patent
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Abstract
An internal combustion engine including an igniter disposed at least partially within an aperture defined in a housing of the engine, the igniter having a body including a tip supporting portion and having a tip extending from the tip supporting portion. A cooling sleeve is disposed around the tip supporting portion, and the cooling sleeve defines a path of heat transfer between the tip supporting portion and the housing. The engine may be a rotary engine. A method for cooling an igniter of an internal combustion engine is also discussed.
Claims18
A method for cooling an igniter of an internal combustion engine, comprising:
- transferring heat from the igniter to a cooling sleeve disposed around the igniter;
- transferring heat through the cooling sleeve;
- transferring heat from the cooling sleeve to a housing of the internal combustion engine;
- and
- wherein the internal combustion engine is a Wankel rotary engine, including a rotor having three apex portions mounted for eccentric revolutions within an internal cavity defined in the housing, the internal cavity having an epitrochoid shape with two lobes.
A rotary engine comprising:
- a housing having an internal cavity;
- a rotor received in the internal cavity and cooperating with the housing to define combustion chambers of variable volume in the internal cavity;
- a fuel injector communicating with the combustion chambers;
- an igniter disposed at least partially within an aperture defined in the housing, the igniter having a body including a tip supporting portion and having a tip extending from the tip supporting portion, the tip configured to ignite fuel injected by the fuel injector;
- and
- a cooling sleeve received in the aperture and disposed around the tip supporting portion, the cooling sleeve defining a path of heat transfer between the tip supporting portion and the housing.
An internal combustion engine comprising a housing defining a cavity and an inner body sealingly moving inside the cavity for defining at least one combustion chamber of variable volume, the internal combustion engine further comprising an igniter disposed at least partially within an aperture extending through the housing, the igniter having a body including a tip supporting portion and having a tip extending from the tip supporting portion, the tip configured to ignite fuel injected by a fuel injector, and a cooling sleeve disposed around the tip supporting portion, the cooling sleeve defining a path of heat transfer between the tip supporting portion and the housing;
- wherein the housing includes a pilot subchamber in communication with the at least one combustion chamber, the fuel injector is a pilot fuel injector communicating with the pilot subchamber, and the tip of the igniter is in communication with the pilot subchamber.
Dependencies are inferred from the claim text.