Patent ID: 7788901
Filing Date: 2010-09-07
Classification: F01N,F02B,F02D,F02M

Abstract:
1. A method for increasing the temperature of an engine exhaust treatment device comprising: a. selectively providing incomplete combustion of an air/fuel mixture in a cylinder of an internal combustion engine without increasing a cylinder pressure of the cylinder, said incomplete combustion comprising introducing into said cylinder a quantity of fuel (Q) wherein products of said incomplete combustion comprise (0.5-1.0)(Q); b. directing products of said incomplete combustion to an engine exhaust treatment device, said engine exhaust treatment device comprising a catalyst; c. exposing said engine exhaust treatment device to said products of incomplete combustion, wherein said products comprise a non-combusted hydrocarbon compound; and d. increasing the temperature of said engine exhaust treatment device in an amount of about 200° to about 500° C. due to exposure of said engine exhaust treatment device to the non-combusted hydrocarbon compound and reacting therein, wherein the temperature of said exhaust treatment device is increased to a temperature suitable for a regeneration of said catalyst.