EGR Venturi Diesel Injection
First Claim
1. An arrangement for pre-mixing gas flow and fuel in a diesel engine, comprising:
- an air conduit having an inlet for a first gas flow and through which air flows to the engine, said air conduit having a reduced portion;
a valve body arranged to be displaced in a longitudinal direction of the air conduit in order to achieve a variable venturi effect and in this way a variable suction; and
one or more fuel injectors for injecting fuel in the air conduit, the one or more fuel injectors positioned at or upstream from the valve body;
wherein fuel injected into the air conduit mixes with the gas flow to create a mixture before said mixture flows to the engine for combustion; and
wherein the fuel is diesel fuel.
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Accused Products
Abstract
An arrangement for mixing a first and a second gas flow, for example, an inlet flow with an exhaust gas return flow in a diesel engine. An air conduit has an inlet for the first flow and an inlet for the second flow, in order to achieve the mixing. A valve body is arranged to be displaced in the longitudinal direction of the air conduit at the inlet for the second flow in order to achieve a variable venturi effect and in this way a variable suction effect and mixture of the mixed flow. One or more fuel injectors inject fuel into the air conduit to pre-mix fuel with the first and second gas flows before reaching the engine cylinders for combustion.
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Citations
36 Claims
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1. An arrangement for pre-mixing gas flow and fuel in a diesel engine, comprising:
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an air conduit having an inlet for a first gas flow and through which air flows to the engine, said air conduit having a reduced portion; a valve body arranged to be displaced in a longitudinal direction of the air conduit in order to achieve a variable venturi effect and in this way a variable suction; and one or more fuel injectors for injecting fuel in the air conduit, the one or more fuel injectors positioned at or upstream from the valve body; wherein fuel injected into the air conduit mixes with the gas flow to create a mixture before said mixture flows to the engine for combustion; and wherein the fuel is diesel fuel. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 34)
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2. (canceled)
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18. An arrangement for pre-mixing gas flow and fuel in a diesel engine, comprising:
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an air conduit having an inlet for a first gas flow and through which air flows to the engine, said air conduit having a reduced portion; a valve body arranged to be displaced in a longitudinal direction of the air conduit in order to achieve a variable venturi effect and in this way a variable suction; a supply part having an inlet adjacent to the air conduit for introducing a second gas flow into the air conduit, the supply part positioned at or upstream from the valve body; and one or more fuel injectors for injecting fuel in the air conduit, the one or more fuel injectors positioned at or upstream from the valve body; wherein fuel injected into the air conduit mixes with the gas flows to create a mixture before said mixture flows to the engine for combustion; and wherein the fuel is diesel fuel. - View Dependent Claims (20, 21, 22, 23, 24, 25, 35)
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19. (canceled)
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26. A method for pre-mixing gas flow and fuel in a diesel engine, comprising the steps of:
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supplying a first gas flow to an engine through an air conduit having a reduced portion; positioning a valve body in a longitudinal direction within the air conduit in order to achieve a variable venturi effect and in this way a variable suction; and injecting fuel in the air conduit at a position at or upstream from the valve body; wherein the fuel injected into the air conduit mixes with the gas flow to create a mixture before said mixture flows to the engine for combustion; and wherein the fuel is diesel fuel. - View Dependent Claims (27, 28, 30, 31, 32, 33, 36)
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29. (canceled)
Specification