Patent ID: 6718251
Filing Date: 2004-04-06
Classification: F02D,Y02T

Abstract:
System for controlling exhaust emissions produced by an internal combustion engine, the system comprising:an engine speed sensor sensing a rotational speed of an internal combustion engine and producing a speed signal corresponding thereto; means for determining an altitude of said engine and producing an altitude value corresponding thereto; means for determining an ambient temperature external to said engine and producing a temperature value corresponding thereto; means for determining an output torque produced by said engine and producing a torque value corresponding thereto; and a control computer determining a maximum allowable emission level as a function of said speed signal, said altitude value, said temperature value and said torque value, said computer controlling an air handling system of said engine as a function of said maximum allowable emission level such that exhaust emissions produced by said engine are limited to said maximum allowable emission level.