Automotive diesel exhaust HC dosing valve for use with diesel particulate filter systems
First Claim
1. A dosing valve assembly for administering a reducing agent into an exhaust stream from an internal combustion engine upstream of a catalytic converter and a diesel particulate filter, comprising:
- a control valve coupled to a source of fuel; and
a delivery valve constructed and arranged for coupling to the exhaust stream at a location upstream of the catalytic converter and the diesel particulate filter to enable a reducing agent to be administered into the exhaust stream, the delivery valve including an inlet communicating with an elongated conduit connecting the control valve and delivery valve for fluidly communicating the reducing agent from the control valve to the delivery valve.
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Accused Products
Abstract
A dosing valve assembly is disclosed for administering a reducing agent into an exhaust stream from an internal combustion engine upstream of a catalytic converter and diesel particulate filter. The dosing valve assembly includes a control valve coupled to a source of reducing agent, a delivery valve constructed and arranged for coupling to the exhaust stream to enable a quantity of reducing agent to be administered into the exhaust stream, and an elongated conduit connecting the control valve and delivery valve for fluidly communicating reducing agent from the control valve to the fuel delivery valve. The disclosed arrangement enables the control valve to be displaced from the delivery valve and thus away from the high temperature environment proximal to the exhaust stream.
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Citations
19 Claims
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1. A dosing valve assembly for administering a reducing agent into an exhaust stream from an internal combustion engine upstream of a catalytic converter and a diesel particulate filter, comprising:
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a control valve coupled to a source of fuel; and
a delivery valve constructed and arranged for coupling to the exhaust stream at a location upstream of the catalytic converter and the diesel particulate filter to enable a reducing agent to be administered into the exhaust stream, the delivery valve including an inlet communicating with an elongated conduit connecting the control valve and delivery valve for fluidly communicating the reducing agent from the control valve to the delivery valve. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A dosing valve assembly for administering fuel into an exhaust stream from an internal combustion engine upstream of a catalytic converter and a diesel particulate filter, comprising:
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an electronic fuel injector coupled to a source of fuel; and
a poppet valve constructed and arranged for coupling to the exhaust stream at a location upstream of a catalytic converter and a diesel particulate filter to enable fuel to be administered into the exhaust stream, the poppet valve including an inlet communicating with an elongated conduit connecting the electronic fuel injector and poppet valve for fluidly communicating fuel from the electronic fuel injector to the poppet valve. - View Dependent Claims (9, 10, 11, 12)
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13. A dosing valve assembly for administering diesel fuel into an exhaust stream from an internal combustion engine upstream of a catalytic converter and a diesel particulate filter, comprising:
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a control valve coupled to a source of diesel fuel;
a delivery valve constructed and arranged for coupling to the exhaust stream to enable diesel fuel to be administered into the exhaust stream upstream of the catalytic converter and diesel particulate filter, the delivery valve including an inlet communicating with an elongated conduit connecting the control valve and delivery valve for fluidly communicating diesel fuel from the control valve to the delivery valve, the elongated conduit displacing the control valve from the fuel delivery valve. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification