Coal-water slurry fuel internal combustion engine and method for operating same
First Claim
1. An internal combustion engine fueled with a coal-water slurry comprising in combination an engine block having a cylinder with a reciprocating piston therein, a cylinder head attached to the engine block for defining with the cylinder and the piston a main combustion chamber, means for introducing a charge of air into the main combustion chamber, first fuel injecting means supported by the cylinder head and in registry with the main combustion chamber for directly injecting into the combustion chamber a major portion of a coal-water slurry charge required for a power cycle of the engine, and ignition means for the major portion of the coal-water slurry charge provided by pilot chamber means supported by the cylinder head and comprising wall means defining and enclosing a pilot combustion chamber at a location spaced from the main combustion chamber, passageway means interconnecting the pilot combustion chamber and the main combustion chamber, and second fuel injecting means supported by the pilot chamber means and in registry with the pilot combustion chamber for injecting a minor portion of the coal-water slurry charge into the pilot combustion chamber for combustion thereof with a portion of the air introduced into the main combustion chamber and conveyed into the pilot combustion chamber through said passageway means to provide a stream of hot combustion gases conveyable through said passageway means into the main combustion chamber for effecting the ignition of the major portion of said coal-water slurry charge injected into the main combustion chamber, and means associated with said pilot combustion chamber for heating the portion of air conveyed into the pilot combustion chamber to a temperature adequate to ignite said minor portion of the coal-water slurry charge upon the admixture therewith in the pilot combustion chamber.
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Accused Products
Abstract
An internal combustion engine fueled with a coal-water slurry is described. About 90 percent of the coal-water slurry charge utilized in the power cycle of the engine is directly injected into the main combustion chamber where it is ignited by a hot stream of combustion gases discharged from a pilot combustion chamber of a size less than about 10 percent of the total clearance volume of main combustion chamber with the piston at top dead center. The stream of hot combustion gases is provided by injecting less than about 10 percent of the total coal-water slurry charge into the pilot combustion chamber and using a portion of the air from the main combustion chamber that has been heated by the walls defining the pilot combustion chamber as the ignition source for the coal-water slurry injected into the pilot combustion chamber.
24 Citations
14 Claims
- 1. An internal combustion engine fueled with a coal-water slurry comprising in combination an engine block having a cylinder with a reciprocating piston therein, a cylinder head attached to the engine block for defining with the cylinder and the piston a main combustion chamber, means for introducing a charge of air into the main combustion chamber, first fuel injecting means supported by the cylinder head and in registry with the main combustion chamber for directly injecting into the combustion chamber a major portion of a coal-water slurry charge required for a power cycle of the engine, and ignition means for the major portion of the coal-water slurry charge provided by pilot chamber means supported by the cylinder head and comprising wall means defining and enclosing a pilot combustion chamber at a location spaced from the main combustion chamber, passageway means interconnecting the pilot combustion chamber and the main combustion chamber, and second fuel injecting means supported by the pilot chamber means and in registry with the pilot combustion chamber for injecting a minor portion of the coal-water slurry charge into the pilot combustion chamber for combustion thereof with a portion of the air introduced into the main combustion chamber and conveyed into the pilot combustion chamber through said passageway means to provide a stream of hot combustion gases conveyable through said passageway means into the main combustion chamber for effecting the ignition of the major portion of said coal-water slurry charge injected into the main combustion chamber, and means associated with said pilot combustion chamber for heating the portion of air conveyed into the pilot combustion chamber to a temperature adequate to ignite said minor portion of the coal-water slurry charge upon the admixture therewith in the pilot combustion chamber.
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10. A method for operating an internal combustion engine on a coal-water slurry fuel, comprising the steps of:
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providing a main combustion chamber defined by a cylinder, piston and cylinder head; providing a wall-defined pilot combustion chamber in the cylinder head; providing a passageway interconnecting the pilot combustion chamber and the main combustion chamber; introducing a charge of air into the main combustion chamber; injecting a first charge of coal-water slurry corresponding to a minor portion of the total charge of coal-water slurry used in a power cycle in the engine into the pilot combustion chamber for mixing with a portion of the charge of air entering the pilot combustion chamber through the passageway; heating the portion of the charge of air entering and within the pilot combustion chamber to a temperature adequate to effect ignition of the first charge of the coal-water slurry upon the injection thereof into the heated air for providing a stream of hot combustion gases; and injecting a second charge of coal-water slurry into the main combustion chamber in the presence of the balance of the charge of air for the ignition of the resulting air-fuel mixture upon contact with a stream of hot combustion gases conveyed into the main combustion chamber from the pilot combustion chamber through the passageway. - View Dependent Claims (11, 12, 13, 14)
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Specification