| abstract |
The present invention relates to an apparatus and method for delivering tungsten into a fuel combustion system or to the exhaust therefrom. By the present invention, tungsten from the lubricant or the fuel will interact with combustion products and, in particular, phosphorus, sulfur, and/or lead from the combustion products. In this manner, the tungsten scavenges or inactivates harmful mabrials which have migrated into the fuel or combustion products, and which can otherwise poison catalytic converters, sensors and/or automotive on-board diagnostic devices. The present invention can also lead to improved durability of exhaust after treatment systems. A lubricant in accordance with the present invention is also disclosed. |