Technique and method to measure and calculate particulates output from gasoline engines

A method to determine soot mass of a gasoline engine powered automobile vehicle, comprising:

• predefining a time period between approximately 50 seconds to 200 seconds defining a cold start operation of a gasoline engine;
• determining an engine coolant temperature at a time defining a start of the cold start operation;
• identifying a cold start soot mass value from a lookup table based on the predefined time period and the engine coolant temperature;
• calculating a hot engine soot mass value for a hot engine operating time;
• repeating the calculating step for at least one next successive hot engine operating time;
• and
• adding the cold start soot mass value to the hot engine soot mass value for the hot engine operating time and the at least one next successive hot engine operating time to define a total soot mass value.

A soot mass determination system for a gasoline engine powered automobile vehicle, comprising:

• a cold start operation of a gasoline engine having a predefined time period between approximately 50 seconds to 200 seconds;
• an engine cold start critical temperature determined at a time defining a start of the cold start operation;
• a cold start soot mass value identified from a lookup table based on the predefined time period and the engine cold start critical temperature including a piston surface temperature, an ambient temperature, a coolant temperature, and an oil temperature;
• a hot engine soot mass value calculated for a hot engine operating time and for at least one next successive hot engine operating time;
• and
• a total soot mass value identified by adding the cold start soot mass value to the hot engine soot mass value for the hot engine operating time and the at least one next successive hot engine operating time.