|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||60/274 ; 60/295 ; 60/299|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 56 인용 특허 : 4|
Emissions of pollutants from diesel engines are reduced by a combination of mechanical devices and fuel additives. In one series of embodiments, diesel emissions of NO.sub.x and particulates are reduced, simultaneously with gaseous hydrocarbons and carbon monoxide, by the combined use of exhaust gas recirculation or engine timing modification, with a particulate trap and a platinum group metal catalyst composition. In another embodiment, a multi-metal catalyst composition, comprising a combination of a platinum metal catalyst composition and at least one...
[ We claim:] [1.] A method for improving the operation of a diesel engine equipped with a diesel trap, comprising:adding a platinum group metal composition and a cerium compound to a diesel fuel in an effective amount to lower the emissions of unburned hydrocarbons and carbon monoxide and to lower the temperature at which particulates are burned from the trap;operating the diesel engine by burning the fuel over a sufficient period of time to produce exhaust gases and achieve a sustained reduction in unburned hydrocarbons and carbon monoxide; andpassing t...