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US 5,070,833 AGranted
Heat-insulating engine with swirl chamber
AssigneeIsuzu Motors Limited
InventorHiroshi Matsuoka
Life of this patent
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AssigneeIsuzu Motors Limited
InventorHiroshi Matsuoka
Estimating the term…
In a heat-insulating swirl chamber engine, subsidiary fuel is injected from subsidiary nozzles along the inner wall surfaces of swirl chambers of a heat-insulating structure from the second half of an intake stroke to the first half of a compression stroke, so that a lean mixture formed in the swirl chambers does not diffuse into cylinders, deterioration of hydrocarbon components can be prevented and moreover, since the fuel comes into contact with the wall surfaces of the swirl chambers, heat energy can be recovered from the wall surfaces. Next, main fuel is injected from main nozzles into the swirl chambers from the second half of the compression stroke to the first half of an expansion stroke, so that the inside of the swirl chambers becomes fuel-rich due to the lean mixture formed in advance in the swirl chambers and the fuel by the main injection, combustion is effected in the fuel-rich state to restrict the generation of NOx and moreover, cycle efficiency can be improved because the main combustion period is shortened.
A heat-insulating swirl chamber engine which includes a cylinder block having cylinders, a cylinder head fitted to said cylinder block, pistons reciprocating inside said cylinders, swirl chamber blocks of a heat-insulating structure disposed inside said cylinder head and swirl chambers formed in said swirl chamber blocks, and which is sequentially operated in four-stroke cycle of an intake stroke, a compression stroke, an expansion stroke and an exhaust stroke;
A heat-insulating swirl chamber engine which includes a cylinder block, holes formed in said cylinder block, cylinder liners fitted into said holes, main combustion chambers formed inside said cylinder liners, a cylinder head fitted to said cylinder block, intake/exhaust ports formed in said cylinder head, intake/exhaust valves for opening and closing said intake/exhaust ports, pistons reciprocating inside said cylinder liners, swirl chamber blocks of a heat-insulating structure disposed in said cylinder head, swirl chambers formed in said swirl chamber blocks, and communication ports for communicating said swirl chambers with said main chambers, and which is operated sequentially in four-stroke cycle of an intake stroke, a compression stroke, an expansion stroke and an exhaust stroke;
A heat-insulating swirl chamber engine which includes a cylinder block having cylinders, a cylinder head fitted to said cylinder block, pistons reciprocating inside said cylinders, swirl chamber blocks of a heat-insulating structure disposed in said cylinder head and swirl chambers formed in said swirl chamber blocks, and which is sequentially operated in four-stroke cycle of an intake stroke, a compression stroke, an expansion stroke and an exhaust stroke;
A heat-insulating swirl chamber engine which includes a cylinder block having cylinders, a cylinder head fitted to said cylinder block, pistons reciprocating inside said cylinders, crank shafts for reciprocating said pistons inside said cylinders, swirl chamber blocks of a heat-insulating structure disposed in said cylinder head and swirl chambers formed in said swirl chamber blocks, and which is sequentially operated in four-stroke cycle of an intake stroke, a compression stroke, an expansion stroke and an intake stroke;
Dependencies are inferred from the claim text.