초록 ▼

The present invention relates to a method and apparatus for removing hydrocarbons from the exhaust stream of a diesel engine prior to cooling the exhaust for recycling through the intake manifold. A filter is used to remove hydrocarbon combustion products, including particulate matter, from the exha

The present invention relates to a method and apparatus for removing hydrocarbons from the exhaust stream of a diesel engine prior to cooling the exhaust for recycling through the intake manifold. A filter is used to remove hydrocarbon combustion products, including particulate matter, from the exhaust at a point after the exhaust gasses leave the exhaust manifold and before the exhaust gasses enter an exhaust gas cooler. Reduction of the hydrocarbon levels in the exhaust gasses slows or prevents buildup of hydrocarbon residue downstream of the filter, such as in the exhaust gas cooler, reducing the frequency of the requirement for cleaning or replacing the filter and effectively extending the life of the exhaust system.

대표청구항 ▼

1. A system for reducing hydrocarbon deposits in an exhaust gas recirculation cooler in an internal combustion engine, comprising:an air intake; an internal combustion engine connected in fluidic communication with the air intake; an exhaust manifold connected in fluidic communication with the inter

1. A system for reducing hydrocarbon deposits in an exhaust gas recirculation cooler in an internal combustion engine, comprising:an air intake; an internal combustion engine connected in fluidic communication with the air intake; an exhaust manifold connected in fluidic communication with the internal combustion engine; a hydrocarbon filter connected in fluidic communication with the exhaust manifold further comprising: a porous refractory substrate adapted to allow, fluidic communication therethrough; and a catalytic metal coating at least some of the pores; an exhaust gas recirculation cooler connected in fluidic communication with the hydrocarbon filter and connected in fluidic communication to the air intake; and a valve operationally connected in fluidic communication with ,the hydrocarbon filter and the exhaust gas recirculation cooler; wherein the exhaust manifold is adapted to emit exhaust gasses containing hydrocarbons when the engine is actuated; wherein the valve is adapted to control the fluid flow between the hydrocarbon filter and the exhaust gas recirculation cooler; wherein hydrocarbon-containing exhaust gasses exiting the exhaust manifold are routed through the hydrocarbon filter; wherein at least some of the hydrocarbons passing through the hydrocarbon filter are removed from the exhaust gas; wherein the filtered exhaust gasses exiting the hydrocarbon filter are circulated through the exhaust gas recirculation cooler and into the air intake for recirculation through the engine; wherein removing the at least some of the hydrocarbons from the exhaust gasses retards buildup of hydrocarbon residue in the exhaust gas recirculation cooler; wherein removal of the at least some of the hydrocarbons from the exhaust gasses reduces hydrocarbon emissions from the engine; and wherein hydrocarbons flowing through the coated pores are catalytically oxidized.