Premixed fuel and gas method and apparatus for a compression ignition engine
AssigneeCaterpillar Inc.
InventorDavid L Lehman
Life of this patent
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Abstract
A method and apparatus for delivering a mixture of fuel and gas to a combustion chamber of a compression ignition engine. The method and apparatus includes compressing a gas to a pressure sufficient to initiate combustion of a fuel, delivering a stream of the gas toward the combustion chamber, injecting a quantity of fuel into the stream of gas to create a near homogeneous fuel and gas mixture, and delivering the fuel and gas mixture to the combustion chamber such that combustion occurs substantially within the combustion chamber.
Claims23
A method for delivering a mixture of fuel and gas to a combustion chamber of a compression ignition engine, comprising the steps of:
- compressing a gas to a pressure sufficient to initiate combustion of a fuel;
- delivering a stream of the gas toward the combustion chamber;
- injecting a quantity of fuel into the stream of gas to create a near homogeneous fuel and gas mixture;
- and
- delivering the fuel and gas mixture to the combustion chamber such that combustion occurs substantially within the combustion chamber.
An apparatus for delivering a mixture of fuel and gas to a combustion chamber of a compression ignition engine, comprising:
- a compressor;
- an accumulator for storing a quantity of gas compressed by the compressor at a pressure sufficient to initiate combustion of a fuel;
- a passageway from the accumulator to the combustion chamber for delivering a quantity of compressed gas to the combustion chamber at a desired velocity;
- and
- a fuel injector located in the passageway for injecting a quantity of fuel into the quantity of compressed gas.
An apparatus for delivering a mixture of fuel and gas to a combustion chamber of a compression ignition engine, comprising:
- an intake valve providing an inlet for air to the combustion chamber;
- an exhaust valve providing an outlet for exhaust gas from the combustion chamber;
- an outlet port from the combustion chamber having a check valve located therein;
- an accumulator connected to the outlet port for receiving at least one of compressed air and exhaust gas from the combustion chamber;
- and
- a passageway from the accumulator to the combustion chamber for delivering a mixture of compressed gas and fuel to the combustion chamber.
Dependencies are inferred from the claim text.